Patent Application
20210245003
The present invention relates to a portable device for strengthening leg muscles.
When a person is unwell or injured and is immobile for a period, they can lose up to 20% of muscle strength within the first 7 days. It is common for patients in hospital to be in bed for extended periods of time, especially those who are more elderly and frail, have suffered fractures or have complex multi pathologies. The significant and rapid reduction of muscle strength otherwise known as the de-conditioning effect, can be extreme for bed ridden patients and can have life changing effects. Physiotherapists have limited time and are under a huge amount of pressure to successfully rehabilitate these patients and get them home quickly. There is limited effective strengthening equipment available to use with patients and there is a need for a better solution to speed up the rehabilitation process.
In order to treat de-conditioned muscles, leg muscles in particularly, physiotherapists require a muscle strengthening machine that is safe and effective and can be used in the correct manner by the patient independently. They need to be able to set a patient up on a device and be confident that the patient can utilise the equipment easily so that they can manage their own exercises safely and well. This will allow the Physiotherapist the ability to treat another patient nearby, therefore optimising their time allowing more patients to be treated.
Known strengthening equipment currently available for use by Physiotherapists include resistance bands, which are elastic bands typically held in place during exercise to increase the resistance experienced by the exerciser to increase strength of the exercised muscle. However, whilst resistance bands are portable and inexpensive, many patients find them too difficult to hold in the correct position for doing leg strengthening exercises. Furthermore, injuries have been reported, whereby the band may snap, causing injury to the skin or eyes, the band may dig into fragile skin on the outside edge of the foot causing pressure damage or the user may also become tired and release a grip on one side of the band thus incurring injury. It is also easy for an inexperienced user to use the resistance band incorrectly, applying resistance to an incorrectly executed exercise rendering the exercise ineffective and potentially damaging.
Alternative forms of rehabilitation are available for example the use of ankle weights in combination with physical activity or use of a static bicycle or pedals. However, such weights applied for example around a user's ankle can damage fragile patient's skin. Static bicycles are expensive, heavy and awkward to move longer distances and these gym-style apparatuses require a user to perform the exercise with both lower limbs together. There are many patients for example, those with lower limb fractures in plaster, splints or external fixators, spinal injuries, stroke, those lacking core stability and control, that these are not suitable for and are better served by equipment that enables the use of one leg at a time. It is a further problem that some patients need to be restricted to bed rest due to their condition, this causes complications to be able to exercise the leg muscles sufficiently as they cannot weight bear or do standing exercises. Known static gym-style devices cannot be used on a bed or whilst the user is sitting in a chair.
Strengthening equipment in the form of exercise devices which employ movement along a horizontal plane against resistance are known. However, these are not lightweight, and due to having irregular metal edges can incur tissue damage from sharp edges, increasing the risk of infection by users. Such devices are not safe enough for unsupervised use for many patient groups.
It is a problem with known strengthening exercises which employ movement along a horizontal plane against resistance that the machines only have a foot plate and do not support the leg adequately to allow for unsupervised use by weaker patients. To achieve the desired strengthening results, the lower leg needs to be maintained in a safe, stable position. It is advantageous to have the calf and ankle supported to maintain a correct position throughout the exercise period to avoid any misalignment of the lower leg occurring due to fatigue or user error. Therefore, there is a need for a piece of equipment which can be used unsupervised, which maintains and supports the position of the lower leg in relation to the angle of the foot, that will address the problem of unsupervised strengthening patients leg muscles whilst fully supporting the patients leg in a safe and comfortable way. Further, because people have varying degrees of flexibility of their ankles such apparatus need to be able to accommodate variability in the angle of ankle movement to ensure that all users can perform the exercise comfortably.
Known exercising equipment has a flat foot plate that the user places their feet on whilst performing the exercise. This is problematic since the force exerted by a user transfers pressure through the heel area which is at risk of breaking down in those that are frail and on sustained bed rest. There is a need for a device which ensures that no pressure goes through the heel area of the user, to avoid the potential for skin destruction and long-term complications of such an event. For those users who already have broken skin on their heels or pressure sores, they need to be able to use leg strengthening equipment safely without any further risk or damage to their skin condition.
It is a further problem with prior art exercise devices which employ movement along a horizontal plane against resistance that they do not include stops or means to limit the user's joint movement when using the device. Thus, a user can engage in physical movement of their leg beyond what is appropriate for their condition thus potentially causing muscle or joint damage.
Known devices are typically configured to exercise either the quadriceps or the hamstrings and lack the versatility to be used interchangeably for both.
Accordingly, there is a need for an inexpensive, lightweight and portable, exercising device which can be used interchangeably to exercises either the hamstring or quadriceps and which can be used unsupervised for treatment of lower limb de-conditioning. The apparatus should be versatile so that users in bed or in a chair can perform the exercises equally as effectively and there is a necessity for the device to be simple to set up and use independently. The apparatus needs to be safe for those with pressure sores to use and prevent damaging heel tissue whilst performing their required exercises. It needs to be easy to use and easy to store so that hospitals and independent users at home can get benefit from use of the device.
Accordingly, it is the primary goal of the present invention to provide a portable, safe and effective device for leg muscle strengthening. According to a first aspect there of the present invention, there is provided a portable therapeutic leg strengthening apparatus comprising:
a longitudinal body having first and second ends;
a guide member moveable between said first and second ends in a direction substantially parallel to a main length of said longitudinal body;
a footplate pivotally connected to said guide member;
a calf support adjustably connected to said footplate;
one or a plurality of resiliently biased means; and
a connecting means for connecting said one or a plurality of resiliently biased means to said guide member;
said one or a plurality of resiliently biased means providing variable resistance to said connecting means to increase or decrease the force required by said user to move said guide member between said first and second ends of said longitudinal body;
wherein an angle of connection between the footplate and the calf support is adjustable; and
wherein said footplate and said calf support form a leg rest, configurable between first and second configurations, such that:
in said first configuration the leg rest is arranged such that the guide member is pushed against the resistance generated by said one or more resiliently biased means between said first and second ends of the device to exercise the quadriceps and in said second configuration the guide member is pulled against the resistance generated by said one or more resiliently biased means between said first and second ends of the device to exercise the hamstring.
Advantageously the guide member is rotatable by substantially 180° relative to the longitudinal body of the device about a pivot point.
Preferably, the angle of the footplate and the calf support are adjustably joined by a hinge.
It is envisaged that the footplate is a two-part assembly for ease of manufacture and/or storage and transportation.
Preferably, the apparatus further comprises a removable heel support locatable within said footplate, configurable between first and second positions, such that:
in a first position the footplate is arranged such that a user exerts pressure though the ball of the foot to move the guide member between first and second ends of the longitudinal body and in a second position the footplate is arranged so that the user exerts pressure through their heel to move the guide member between first and second ends of the longitudinal body.
Advantageously, the removable heel support allows the area through which a user of the apparatus exerts force to be adjusted. In the presence of the heel support pressure can be exerted through the heel. The ability to apply full pressure through the heel to the device is important for individuals with for example neurological conditions who need to exercise their limbs without increasing tone in the leg muscles. When the device is used without the heel support pressure is exerted through the ball of the foot rather than the heel. The absence or significant reduction of pressure through the heel area is particularly advantageous to patients who have pressure sores or fragile skin on their heels but still require action of movement of the device. The adjustability of the device allowing pressure to be exerted either through the ball of the foot or the heel allows the device to be adapted to an individual patient's needs.
It is envisaged that the device will include a removable liner which assists in the comfort of the user. Furthermore, because of the removable nature of the liner, the device can be used by multiple individuals changing the internal liner for hygiene purposes between users.
Preferably the removable liners will be magnetically aligned with the footplate and calf support for easy fitting.
It is envisaged that the footplate and calf support will be replaceable with a gripping portion to allow the device to be used to exercise the upper body and/or arms or a smaller ‘leg rest’ for use by children.
Advantageously the device will include a manual or electronic counter since there is a need when exercising to accurately record the number of repetitions that the user has performed so the therapist and user can keep track of easily, see progress and assess improvement.
Preferably the connecting means will be a steel cable which is hard wearing and durable.
The present invention has a foot support and calf support otherwise referred to as a ‘leg rest’. The foot support and calf support are attached to a sliding element or guide member that moves longitudinally along the body of the device. The calf support has a shaped length of plastic material; covered by pressure relieving material; which supports the patient's calf in a comfortable relaxed position. The foot support is attached to the calf support piece by a hinged joint to allow for changes of angle of user's foot position. The foot and calf support has no material that comes into contact with the user's heel. All pressure from the user is through the forefoot to push the siding element along the body of the device. The sliding element or guide member may be a nylon slide plate, an aluminium slide plate or a trolley
Having a ‘leg rest’ ensures that the therapist and patient are confident that the entire set of exercises will be done correctly as it will not allow the user's leg to drift out of alignment as the muscles fatigue. The ‘leg rest’ also enables the user's leg to be supported against gravity allowing the user to perform more exercises before the leg muscles fatigue.
The ‘leg rest’ of the present invention will be designed to not allow the user to put any pressure through the heel area of their foot. This will ensure safe use by those users with heel sores and prevent other users damaging the delicate skin on their heels. The material used in the lining of the ‘leg rest’ will have pressure relieving qualities and comply with tissue viability and infection control global policy.
The ‘leg rest’ of the present invention will also have an adjustable ankle position, to allow for individual setting for each user to ensure comfort of foot position throughout the movement/exercise period. This is due to all people having different degrees of available movement of their ankles.
The entire ‘leg rest’ of the present invention can tilt in the longitudinal plane. This enables maintenance of support of the user's lower leg as the user extends the knee out along the length of the device and flexion of the leg as the user returns the sliding element back to the start position at the rear of the device. The present invention will also therefore help to improve range of movement of the hip and knee due to the movement of the sliding element and ‘leg rest’ along the length of the device.
The present invention has a sliding element on which sits the pivoting ‘leg rest’. The friction free property of the sliding element is such that the user can move the trolley with using minimal exertion for those who have extremely weak muscles and just starting their rehabilitation. The friction free sliding element will ensure a quiet, smooth movement without jarring effect on the limb whist in use.
To achieve the versatility desired for the apparatus to be used by a wide variety of patients including those on the bed or for users sitting in a chair, the present invention has support legs that can be rotated out from under the device and locked into position for use in a chair or the legs can be folded/rotated away under the device and clipped into place to allow for use on a bed.
The present invention is lightweight and portable enough to carry easily. It has a handle on its side elevation for carrying. The leg rest folds down flat against the device and the legs will rotate away under the device and secure for optimal ease of transportation and portability.
The present invention is manufactured out of material that complies with infection control and tissue viability policy and will not be damaged by the necessary cleaning processes. Clinicians and users will be able to wipe the machine down easily due to the shape and design of the body of the device this having smooth lines and surfaces and no cracks or indentations for dirt or dust to gather.
To comply with infection control policy the device is designed so that the internal mechanical workings are at least partially, preferably fully covered. This is to minimise the accumulation of dust and skin cells around the workings and also assists in maintaining the cleanliness of the device and reduces the likelihood of cross infection between users. The sliding element with the ‘leg rest’ a top will stand minimally proud of the cover on the longitudinal body to allow for smooth movement and effective use of the device.
The device may be used in either a seated position in a chair on by a user on a bed. The position of the legs relative to the body determines the way the device is used. When the legs are substantially perpendicular to the body of the device the device is elevated from the floor and suitable for use by an individual seated in a chair. When the legs of the device at folded flat, the device may be used by an individual on a bed. An additional adjustable stop prevents the device from moving forwardly and sliding along the bed when in use.
To operate the device from a seated position the current invention will have a securing mechanism that attaches to the legs of the user's chair or around the body of a larger recliner chair. This will ensure stability of the device when in use and prevent forward movement away from the chair.
To operate the current invention whilst the user is on the bed, the legs will be folded under the body of the device and secured in place and there will be an adjustable mechanism by means of an adjustable bar, which will extend from the front of the device to butt up against the bed end. This will prevent movement of the device down the bed whilst in use.
Behind the sliding element securing the leg rest, is a flexion block which itself also comprises a sliding element and fixing clip. This block will be required if there needs to be any restriction of knee or hip flexion movement for the user. This is to ensure that there is no possibility of over flexing the joints if there is a medical reason to prevent this i.e. post knee replacement stitches or early post-surgical repair of anterior cruciate ligament. The flexion block can be moved longitudinally along the device to be positioned where is appropriate for individual users.
The present invention incorporates a contact sensor within the apparatus which relays information to a digital display at the rear of the apparatus. This shows the number of full repetitions of movement that have been achieved by the user.
The present invention uses resistance material by means of elastic or rubber cords or springs to create the resistive forces required to enable strengthening of the muscles. There are a plurality of cords or springs available to be used in the present invention. These springs have varying resistance quality. The user is able to have no springs resisting the longitudinal movement for free solely active movement or add in single springs at a time as the muscle strength improves to facilitate effective muscle strengthening through progressive resistance exercise. A steel cable is secured to the back of the sliding element and goes into the device via an aperture at the rear end of the device. Within the body of the device the steel cable is affixed to a metal plate upon which are affixed the resistance providing springs. A plurality of mechanical plungers situated on the top surface of stated device that individually raise or lower into or out of said device to engage or disengage the required and appropriate resistance springs via the loop attachment on the springs. The plunger is raised and lowered manually, but there is no contact between the springs (resistance means) and the user. The resistance of the device can be adjusted by depressing the organ stop type buttons atop the device at the front end to engage the required number of springs and achieve the required level or resistance. The stop mechanically engages and disengage the connections between the resistance means and the connecting means attached to the trolley. This allows a range of adjustment of the resistance rate without any other intervention from the user, e.g.: swapping springs/bands or having to pull and secure extra tension media manually
It is envisaged that the extension of the resiliently biased means is regulated by a block and tackle mechanism. Preferably, the block and tackle mechanism comprises three pulleys.
The one or a plurality of resiliently biased means are elastic or rubber cords or the one or a plurality of resiliently biased means are springs.
The apparatus further comprises a means to engage said one or a plurality of springs and said connecting means. Preferably, the means for engaging one or a plurality of springs with the connecting means is a stop.
The footplate and calf support each further comprise a removable liner. Said removable liners are magnetically aligned with the footplate and calf support to prevent loss.
The connecting means is a steel cable.
The apparatus comprises a bed end stop to stabilize the device in use on a bed. Preferably, the bed end stop comprises two elongate support rods. The bed end stop further comprises a bridging piece between said two elongate support rods.
The footplate and calf support are joined by a hinge.
The footplate may comprise a two-part assembly.
The apparatus may include a manual or electronic counter.
Other aspects are as set out in the claims herein, the features of which are incorporated into this summary of invention by reference.
For a better understanding of the invention and to show how the same may be carried into effect, there will now be described by way of example only, specific embodiments, methods and processes according to the present invention with reference to the accompanying drawings in which:
There will now be described by way of example a specific mode contemplated by the inventors. In the following description numerous specific details are set forth in order to provide a thorough understanding. It will be apparent however, to one skilled in the art, that the present invention may be practiced without limitation to these specific details. In other instances, well known methods and structures have not been described in detail so as not to unnecessarily obscure the description.
The present invention is to be used for strengthening the leg muscles, specifically the quadriceps and can be used whilst sitting in a chair as shown in
Referring to
The friction-free rail is affixed inside the device under a wipeable external cover 109. Attachment of the leg rest 102 to the friction-fee rail 108 mounted within the elongate body 101 is via pivot joint 110. The leg rest 102 has an angle adjusting mechanism 111 to alter the angle between the foot rest 104 and the calf support 103. The angle adjuster 111 is connected to a mechanism 112 that on rotation widens or narrows the heel area 113 between the foot rest 104 and the calf support 103. This ensures individual user specifications depending on the ankle range of movement of each user. In the embodiment shown the heel area 113 does not allow contact with the heel tissue of the user, this is to prevent pressure sores. The user pushes with their forefoot onto the foot rest 104 to propel the trolley 107 that the leg rest 102 is attached to forward along the rail 108 against the resistance of the resistance cords illustrated in
In use, the trolley 107 is moved forwardly and backwardly by the extension and retraction respectively of a user's leg located in the leg rest 102. A contact sensor 115 located at the front of the friction-free rail 108 relays digital information regarding number of repetitions of full leg extension movements achieved by the user to the screen (403;
The extent of movement of the user's knee and hip can be limited if necessary by use of flexion block 116. The block being attached to the rail 108 behind the mobile trolley 107 and the leg rest 102 and being able to move longitudinally and be secured in place where appropriate for the individual user.
The apparatus is configured to be used by someone sitting in a chair, as illustrated by the supporting legs 117 being rotated outwardly from under the body 101 by way of pivoting struts 118. A non-slip material 119 is applied to the floor contacting area of the support legs 117 to avoid movement of the device when in use in the chair configuration. The device further comprises a carry handle 120 located on the base of the elongate body 101.
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Attachment of the leg rest 102 to the friction-fee rail 108 mounted within the elongate body 101 is via pivot joint 110. The leg rest 102 has an angle adjusting mechanism 111 to alter the angle between the foot rest 104 and the calf support 103. The angle adjuster 111 is connected to a mechanism (see
The friction-free rail is affixed inside the device under a wipeable external cover 109. A groove 203 in the top surface of the outer wipeable cover 109 allows contact between the hinged pivot joint 110 of the leg rest 102 and the friction-free rail 108, such that the trolley 107 can be moveably mounted to the rail 108. The groove 203 has an enclosing flap e.g. a rubber or brush strip, to prevent skin cells and debris from falling into the device and onto the rail 108.
In use, the trolley 107 is moved forwardly and backwardly by the extension and retraction respectively of a user's leg located in the leg rest 102.
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The contact sensor (115
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The upper surface of the elongate body 701 is a molded plastic shell of polyurethane or an aluminium extrusion 708 over which a nylon slide plate or trolley 709 is located. The nylon slide plate 709 provides a pivotal anchor point 710 for footplate 711, allowing the angle of the footplate to move freely relative the longitudinal axis L of the device. The footplate 711 may further comprise a removable heel pad 712, by adjusting the point of contact between the foot and the footplate the precise position though which a user has to exert force and thus the area of the user's anatomy which experiences pressure can be adjusted. Thus, when the removable heel pad 712 is absent, the device is driven by pressure through the ball of the user's foot and there is no pressure on the user's heel. Hence, the apparatus is operable without the need for a foot to be flat on the footplate i.e. it avoids pressure going through the heel portion. When the heel pad 712 is present, pressure is exerted through the user's heel via the removable heel pad into the footplate 711 of the device.
A calf support 713 is adjustably connected to the footplate 711. The calf support is molded to reflect the anatomical shape of a user's calf to provide an ergonomic support to ensure that unsupervised patients maintain their leg in the correct orientation when utilising the device. Both the footplate 711 and calf support 713 are lined in foam or soft material to aid the comfort of the user. The angle between the footplate 711 and calf support 713 is adjustable via knob 714 so that the angle of the ankle in said foot and calf support to account for the varying degree of flexibility each user has in their ankle joint. Counter clockwise movement of knob 714 reduces the angle between the footplate and the calf support 713, whilst clockwise rotation of knob 714 increases the angle between the footplate and the calf support 713.
Anchor point 710 also joins the nylon slide plate or trolley 709 bearing the footplate 711 and calf support 713 to a connecting member in the form of steel cable 715. Steel cable 715 runs along a part of the length of the body of the device 701 over and around a wheel (see W in
The resistance of the device and thus the energy required to be exerted by a user pushing though the footplate 711 is adjusted through resistance switches 716 located on the upper surface of the first end 702 of the body of the device 701. A spring-loaded release lever 717 is also provided to disengage the bed end stop (
The number of full leg extensions made is recorded by a digital or manual counter 718. Whilst an end stop clamp 719 is provided to limit the retraction of nylon slide plate or trolley 709 and thus restrict the extent of the user's movement when using the device.
The legs of the apparatus 704 are moveable between first (1), second (2) and third (3) orientations as determined by the height of the ground level or surface the device is being used upon. In use, a bed end stop 803, which comprises a pole 804 extending along the inner length of the device provides stability allowing the device to rest against a bed footboard or headboard when used on a bed.
When not in use the adjustable calf support 713 can be folded forward in the direction of the arrow for storage. The device further comprises a carry handle 805 on its underside so that the device can be carried and a hanging loop 806 for hanging the device.
The organ stop structure 1000 is shown in vertical cross section in
Each organ stop 716 is coupled to the loop end 1001 of a steel spring 801 so that when the corresponding knob, stop or plunger 716 is depressed and pushed downwardly a lower end of the knob, stop or plunger engaged with the central aperture of the loop end of the spring(s) so that the springs are engaged thus increasing the tension experienced by the sliding element, increasing the resistance required by a user to move the footplate of the device in a forward motion.
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The upper surface of the elongate body 1701 is an aluminium extruded body 1708 over which an aluminium slide plate or trolley 1709 is located. The aluminium slide plate 1709 provides a pivotal anchor point 1710 for footplate 1711, allowing the angle of the footplate to move freely relative the longitudinal axis L of the device. The footplate 1711 may further comprise a removable heel pad 1712, by adjusting the point of contact between the foot and the footplate the precise position though which a user has to exert force and thus the area of the user's anatomy which experiences pressure can be adjusted. Thus, when the removable heel pad 1712 is absent, the device is driven by pressure through the ball of the user's foot and there is no pressure on the user's heel. Hence, the apparatus is operable without the need for a foot to be flat on the footplate i.e. it avoids pressure going through the heel portion. When the heel pad 1712 is present, pressure is exerted through the user's heel via the removable heel pad into the footplate 1711 of the device.
A calf support 1713 is adjustably connected to the footplate 1711. The calf support is molded to reflect the anatomical shape of a user's calf to provide an ergonomic support to ensure that unsupervised patients maintain their leg in the correct orientation when utilising the device. Both the footplate 1711 and calf support 1713 are lined in foam or soft material to aid the comfort of the user. The angle between the footplate 1711 and calf support 1713 is adjustable via adjusting means 1714 so that the angle of the ankle in said foot and calf support to account for the varying degree of flexibility each user has in their ankle joint. Counterclockwise movement of adjusting means 1714 reduces the angle between the footplate and the calf support 1713, whilst clockwise rotation of knob 1714 increases the angle between the footplate and the calf support 1713. The user's foot and leg are held in position by silicone straps ‘S’ attached to the footplate 1711 and calf support 1713 respectively. The strap bindings ‘S’ are adjusted by a CAM locks ‘C’ to ensure the user's foot and leg are held in place in the device.
Anchor point 1710 also joins the aluminium slide plate or trolley 1709 bearing the footplate 1711 and calf support 1713 to a connecting member in the form of steel cable 1715. Steel cable 1715 runs along a part of the length of the body of the device 1701 over and around a wheel (see W in
The resistance of the device and thus the energy required to be exerted by a user pushing though the footplate 1711 is adjusted through resistance switches 1716 located on the upper surface of the first end 1702 of the body of the device 1701. A spring-loaded release lever 1717 is also provided to disengage the bed end stop when the device is no longer in use.
The number of full leg extensions made is recorded by a digital counter 1718. Whilst an end stop clamp 1719 is provided to limit the retraction of aluminium slide plate or trolley 1709 and thus restrict the extent of the user's movement when using the device. The device 1700 further includes a start line 1720 to denote the beginning position for the aluminium trolley 1709 when in use by a patient.
In contrast to embodiment two, the device has a substantially rectangular flat end piece which forms an elongate bed stop 1721 and is shown in retracted configuration in
The bed end stop 1721 comprises two elongate poles 1803 which run through the body of the device 1701. Having two supports for the end stop provide greater stability to the device in use and also prevent the device from twisting. A spring-loaded release lever 1804 is operable to disengage the bed end stop and allow the rods 1803 to retract within the body of the device. The trolley 1709 must be at the start line 1720 before adjusting the resistance.
Greater details of the organ stop arrangement of the third embodiment is illustrated in
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The legs have stoppers or feet 1706 shown in
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The upper surface of the elongate body 2602 is a molded plastic shell of polyurethane or an aluminium extrusion over which a nylon slide plate or trolley 2606 is located. All moving parts are located within the body 2602 of the device, to provide a smooth other shell which enhances the slidability of the device. Further the containment of all moving parts within the device prevents the collection of skin debris within said moving parts and minimizes the risk of cross contamination between patients allowing the cover to be cleaned effectively and the device to be shared by several users.
A footplate 2608 is mounted via pivotal anchor point 2607 to the body of the device 2602 by a gantry or nylon slide plate 2606 which can slide back and forth a distance of approximately 380 mm along the longitudinal body of the device. The pivotal anchor point 2607 for footplate 2608, allows the angle of the footplate to move freely relative the longitudinal axis L of the device. The footplate 2608 further comprises a removable heel support or pad 2609, which is a ‘U’ shaped block which sits within the footplate 2608. The outer limits of the ‘U’ shaped heel pad 2609 are in contact with the lower most portion of the footplate 2608 whilst the base of the ‘U’ provides a support to a cushioned insert 2610 located on the footplate 2608. When the heel pad 2609 is present in this orientation, pressure is exerted through the user's heel via the removable heel pad into the footplate 2608 of the device.
By adjusting the orientation of the heel insert 2609 the point of contact between the foot and the footplate the device which determined the contact point though which a user has to exert force and thus the area of the user's anatomy which experiences pressure can be adjusted. The heel support 2609 can be turned upside down to reduce the pressure on the user's heel. The removable heel support 2609 can be stowed in the footplate in as per
A calf support 2611 is adjustably connected to the footplate 2608, together the calf support 2611 and footplate 2608 form a leg rest 2616. The angle between the footplate 2608 and the calf support 2611 is adjustable between 75° and 180°. The calf support is molded to reflect the anatomical shape of a user's calf to provide an ergonomic support to ensure that unsupervised patients maintain their leg in the correct orientation when utilising the device. Both the footplate 2608 and calf support 2611 are lined in foam or soft material to aid the comfort of the user. The angle between the footplate 2608 and calf support 2611 is adjustable via adjustment means 2612 so that the angle of the ankle in said foot and calf support to account for the varying degree of flexibility each user has in their ankle joint. The angle between the footplate 2608 and the calf support 2611 is adjustable between 75° and 180°. Counterclockwise movement of the adjustment means which is a knob 2612 reduces the angle between the footplate 2608 and the calf support 2611, whilst clockwise rotation of knob 2612 increases the angle between the footplate and the calf support 2611.
Anchor point 2607 also joins the gantry or nylon slide plate 2606 bearing the footplate 2608 and calf support 2611 to a connecting member in the form of steel cable 2613. The gantry 2606 is tethered by the steel cable 2613 to a spring assembly (resistance means) inside the housing 2602. The steel cable 2613 runs along a part of the length of the body of the device 2602 over and around a wheel (see W) to anchor the cable to a plurality of springs 2614 which provide variable resistance and form the inner workings of the device analogous to the second embodiment of the invention discussed in detail in
The resistance of the device and thus the energy required to be exerted by a user pushing though the footplate 2608 is adjusted through resistance switches 2615 located on the upper surface of the first end 2603 of the body of the device 2602. Further features including the spring-loaded release lever, bed end stop and digital or manual counter as detailed in the second embodiment are also common to this embodiment.
Referring to
In a first orientation, for exercising the quadriceps the open side of the gantry or trolley 2606 and footplate 2608 assembly is facing towards the first end of the apparatus 2603 bearing the resistance switches 2615. Movement of the trolley 2606 from the second 2604 to the first end 2603 of the body 2602 is a result of the application of force by the quadriceps pushing through the knee joint to propel the trolley 2606. The force applied by the user is a pushing force against the resistance applied by the resistance members 2614. The user's leg is extended to drive movement of the trolley away from the user.
In a second orientation, the rear of the trolley 2606 and footplate 2608 assembly R faces towards the first end of the device 2603 bearing the resistance switches 2615. Movement of the trolley 2606 from the second 2604 to the first end 2603 of the body 2602 is a result of the application of force by the user's hamstrings pulling the trolley 2606 against the resistance means to propel the trolley 2606. Thus, the device can be interchangeably used to exercise both the quadriceps in a pushing action and the hamstrings via a pulling action. The user's leg is bent to cause movement of the trolley towards the user. The force required by the hamstrings or the quadriceps is variable and is determined by the number of resistance means engaged by the steel cable connected to the gantry 2606.
Once the orientation of the device has been selected according to the exercise required by the user, the footplate 2608 position is secured to the gantry 2606 by a lift plunger 2617. When aligned according to the usage required by the user, the plunger 2617 will automatically locate in the corresponding hole located on the gantry 2606. An adjustable strap may be provided with the fourth embodiment of the invention for securing the device at its second end 2604 to a chair when the device is being use for pushing exercises to propel the gantry/trolley 2606 away from the user by action of their quadriceps. Alternatively, the adjustable strap may be used to secure the device at the first end 2603 to a bed end. The strap may also be positioned around the end of a bed when the device is in use in folded leg configuration on top of said bed and is being used to work the hamstrings by the pulling movement of the patient whose flexing of the leg would pull the trolley 2606 towards the user against resistance to work the hamstrings.
Referring to
With the weak spring connected (user's right hand plunger down) there is a force of 6.6 kg; with the medium spring connected (user's left hand plunger engaged) there is a force of 10 kg and with the strong spring connected (middle plunger engaged) there is a force of 13 kg. When all spring are connected (all plungers are down) there is a force of 23.6 kg.
In the embodiments disclosed herein, the footrest has adjustability to have either no pressure on the heel area, or full pressure on the heel area, depending upon the individual patient's needs. The devices may allow no pressure during the action of the movement of the device for those patients who have pressure sores or fragile skin on their heels or full pressure for those for example with neurological conditions to avoid an increase in tone and the leg muscles.
In prior art devices, these have the disadvantages that there is no way to stop those devices from moving about as they are being used. However various ones of the present embodiments have the following advantageous features:
It will be understood that various modifications will be apparent to those skilled in the art. For example the nylon slide plate or trolley may be replaced by any other form of moveable mechanism anchorable to the base of the footplate. The steel cable may be replaced with an alternative reinforced connecting means e.g. a chain or reinforced fibers.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1809564.6 | Jun 2018 | GB | national |
| 1816842.7 | Oct 2018 | GB | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/GB2019/000060 | 4/17/2019 | WO | 00 |
