Scrollable user support device

Abstract

A rollable user support device operable between a first chair mode and a second roller mode, the user support device comprising a frame, a seat, a backrest, a backrest folding mechanism and a seat folding mechanism wherein the seat is attached to the frame and can be placed in a seat deployed position and a seat folded position, the backrest is operably connected to the frame separately from the seat so that the backrest can be brought into a backrest unfolding position and a backrest folding position, and the backrest folding mechanism is operable to move the backrest between the backrest unfolding position and the backrest folding position. A seat folding mechanism attaches the seat to the frame and is indirectly activated at least by the backrest folding mechanism and is operable to move the seat to a seat folded position when the backrest is placed in the backrest folded position and to move the seat to a seat deployed position when the backrest is placed in the backrest deployed position.

Description

[0001] This application is a divisional application of the invention patent application with application number 202180043539.3, application date May 19, 2021, entitled "Rollable User Support Device". Technical Field

[0002] This invention belongs to the field of physical assistive devices, and in particular to a device that can be configured for various functions, such as a sitting aid and a walking aid. Background Technology

[0003] To help people with disabilities, there are several types of rolling chairs and wheelchairs, including those that can transform into rollators (walkers). (Envy) U.S. Patent 7,669,863 discloses a walking aid having a seat assembly that assists a user in rising from a seated position or sitting down from a standing position. The seat assembly is mounted in a frame and includes a gas spring that deflects the seat assembly when the user rises from the seat or reduces the deflection of the seat when the user is seated.

[0004] U.S. Patent 9,877,175 discloses a seating and walking wheelchair with a movable seat and frame. The movable seat is configured to move from a seated position to a standing position. The movable seat includes a seat back with upper and lower ends, and a seat base with a front and rear end. The rear end of the seat base is rotatable about a movable pivot.

[0005] U.S. Patent 8,973,997 discloses a chair operated by a pair of helical shaft-type linear actuators extending from a frame. The chair may have a split seat with a drop-away front portion. One or more motors operate the helical shafts to raise the rear seat portion without changing its angular orientation. A connector connects the frame to the front seat portion, causing it to descend below the user's thighs, while the rear seat portion rises to assist the user in standing.

[0006] US Patent 6,619,681 discloses a seating and walking wheelchair device that can also function as a stand and a hands-free walker. The device lifts the user from a seated position to a standing position, allowing the user to push the device with their legs and feet. When the seat is raised, it swings from a generally horizontal first position to a generally vertical second position, and vice versa.

[0007] U.S. Patent Application 2006 / 022517 discloses a mobility-assistance apparatus including a wheelchair with a seat and frame, and a walking aid connected to and integrated into the wheelchair. The walking aid has a seat lifting mechanism.

[0008] U.S. Patent Application 2007 / 278761 discloses a wheelchair having a frame, a seat, and means for moving the seat between lowered and higher positions. A translation mechanism is connected to the frame and the seat and provides forward and upward translational movement of the seat. An auxiliary device generates a force that moves the seat from a lower position to a higher position. The seat supports the user in a seated position; while in the raised position, the occupant is in a fixed position supported by the weight of the occupant's main body.

[0009] U.S. Patent Application 2005 / 236812 discloses a device for moving a wheelchair seat between lowered and higher positions via a translation mechanism that moves the seat forward and upward.

[0010] The teachings of the aforementioned publications will be taken into consideration as they are fully expounded in this text. Summary of the Invention

[0011] According to a first aspect of the currently disclosed subject matter, a scrollable user support device is provided, configured to scroll on a surface, the device comprising: A rigid frame having a pair of first legs and a pair of second legs, each first leg having a first leg distal end and at least one first wheel connected thereto, thereby being rollable and rotatable; each second leg having a rear leg distal end and at least one second wheel attached thereto. A seat, operably connected to the frame, and positionable relative to the frame in at least two positions via a seat operating and / or folding mechanism: a lower rear seat position, a higher front seat position, and a folded seat position; and At least one wheel control mechanism, which may be at least indirectly activated by a plurality of mechanical elements, the plurality of mechanical elements optionally being at least partially positioned within the frame by the seat control and / or folding mechanism, and comprising at least one (optionally two) of the following: a rolling prevention mechanism operable to prevent the first wheel from rolling on the ground when the seat is in the raised seat position in front of it; at least one first rotation prevention mechanism operable to prevent the rotation of the first wheel when the seat is brought into its higher front seat position; and at least one second rotation prevention mechanism operable to prevent the rotation of the first wheel when the seat is brought into its folded position.

[0012] The above features enable the device to be used as a bidirectional scrollable user support device, operating in at least two of the following three modes: A neutral mode, wherein the seat is in a higher front seat position and the first wheel cannot roll or rotate; A first chair configuration, wherein the seat is in a lower rear seat position and allows the first wheels to roll and rotate, thus forming the front wheels of the chair, enabling the device to roll in a first direction, while the user is seated on the seat and facing the first direction; and A second roller mode, wherein the seat is in a folded position, the first wheel is prevented from rotating, and the second wheel constitutes the front wheel of the roller, enabling the device to roll in a second direction opposite to the first direction, with the standing user facing the second direction.

[0013] Therefore, according to the second aspect of the currently disclosed subject matter, a scrollable user support device configured to scroll on the ground is provided, the device comprising: A rigid frame having a pair of first legs and a pair of second legs, each first leg having a first leg distal end and at least one first wheel connected thereto, thereby being rollable and rotatable; each second leg having a rear leg distal end and at least one second wheel attached thereto, thereby being rollable and rotatable. A seat, operably connected to the frame and capable of being positioned in a lower rear seat position, a higher front seat position, and a folded position; A seat folding mechanism operable to manipulate the seat between a folded position and an open position, the open position being the higher front seat position, the seat being laterally oriented in the folded position to a plane, the plane being thus in the lower rear seat position; A seat control mechanism operable to move the seat between a lower rear seat position and a higher front seat position, wherein a user is seated in the seat; At least one roll-off prevention mechanism, which is indirectly activated at least by the seat operating mechanism and is operable to prevent the plurality of first wheels from rolling on the ground when the seat is brought into its higher front seat position; The device includes at least one first rotation prevention mechanism, which can be indirectly activated by the seat operating mechanism and is operable to prevent the rolling of the plurality of first wheels, wherein the rolling is prevented at least after the rolling is in the higher front seat position of the seat, and the device further includes at least one second rotation prevention mechanism, which can be activated by the seat folding mechanism and is operable to prevent the rotation of the plurality of first wheels of the seat in the folded position; The device is a bidirectional scrollable user support device that can operate in the following three modes: A neutral mode, wherein in the neutral mode, the seat is located in the higher front seat position, and the plurality of first wheels are prevented from rolling and rotating; A first chair mode, wherein in the first chair mode, the seat is located in the lower rear seat position and allows the plurality of first wheels to roll and rotate, thereby forming a plurality of chair front wheels, enabling the device to roll in a first direction, while a user is seated on the seat and facing the first direction; and A second roller mode, wherein in the second roller mode, the seat is in the folded position, the plurality of first wheels are prevented from rotating, and the plurality of second wheels constitute a plurality of roller front wheels, enabling the device to roll in a second direction opposite to the first direction, with a standing user facing the second direction.

[0014] According to a third aspect of the currently disclosed subject matter, a user support device is provided, configured to roll on a surface, the device comprising: A frame having a pair of front legs and a pair of hind legs, each front leg having a distal end and at least one rotatable and swivelable front wheel attached thereto, and each hind leg having a distal end and at least one rear wheel attached thereto, the rear wheel being at least rotatable. A seat, said seat being operably connected to the frame; A seat control mechanism operable to move the seat between a lower rear seat position and a higher front seat position, wherein a user is seated in the seat; At least one roll-off prevention mechanism, said at least one roll-off prevention mechanism being operable to prevent the plurality of front wheels from rolling on the ground when the seat is in its said higher front seat position; and At least one first rotation prevention mechanism, said at least one first rotation prevention mechanism being operable to prevent rotation of the plurality of front wheels, at least after they have rolled.

[0015] According to the fourth aspect of the currently disclosed subject matter, a user support device is provided, configured to roll on the ground, the device comprising: A frame having a pair of front legs and a pair of hind legs, each front leg having a distal end and at least one front wheel attached thereto for rolling and rotation; each hind leg having a distal end and at least one rear wheel thereon. A seat, operably connected to the frame, and available in a lower rear seat position and a higher front seat position; A safety arrangement that performs the following three steps in any order in the device: (a) positioning the seat in a higher front seat position, which may also reduce the seat length; (b) preventing the front wheels from rolling on the ground, at least when the seat is in the higher front seat position; and (c) preventing the front wheels from rotating, at least while preventing the front wheels from rolling. The safety arrangement includes a mechanism that performs at least any two of the above three steps while allowing the remaining third step to be performed.

[0016] In this type of device, the safety device may include an operable seat control mechanism that moves the seat in which the user is seated between a lower rear seat position and a higher front seat position, wherein the seat length in the front area is shorter than the seat length in the lower rear seat position to facilitate the user standing up from their seat position. Alternatively or as a supplement, the safety device may include one or both of the following: at least one roll-off prevention mechanism to prevent the front wheels from rolling on the ground, and at least one roll-off prevention mechanism to prevent the front wheels from rotating when the seat is in the raised front seat position.

[0017] All of the above-mentioned devices can be bidirectional rolling user support devices, and have rolling and rotating front and rear wheels.

[0018] The seats in all of the above-mentioned devices can be moved from a forward-raised seat position to a folded position, with at least some of the seats facing a different orientation than the forward-raised seat position and the rearward-lower seat position.

[0019] Therefore, the devices in all of the above aspects can have a seat folding mechanism to fix the seat to the frame and to move the seat between the folded position and the unfolded position, i.e., the higher front seat position.

[0020] The devices described above may include a second rotation prevention mechanism that is at least indirectly activated by the seat folding mechanism and is operable to prevent first rotation of the seat folding mechanism when it is in the folded position.

[0021] Therefore, the devices described above can operate in the following three modes: Neutral mode, in which the seat is in an elevated position in front, and the front wheels cannot roll or rotate; The first chair mode, in which the seat is in a lower rear position and allows the front wheels to roll and rotate, enabling the device to roll in a first direction, while the user is seated on the seat facing the first direction; and In the second roller mode, the seat is in a folded position, the front wheels act as the rear wheels of the rollers and are prevented from rotating, while the rear wheels act as the front wheels of the rollers, enabling the device to roll in a second direction opposite to the first direction, with the standing user facing the second direction.

[0022] According to a fifth aspect of the currently disclosed subject matter, a bidirectional user support device is provided, characterized in that it can be operated and manipulated between a first chair mode and a second roller mode. In the first chair mode, the device can roll in a first direction while a user sits on it; in the second roller mode, the device can roll in a second direction opposite to the first direction while a standing user faces the second direction. The device includes: A frame having a pair of first legs and a pair of second legs connected thereto, wherein when the device is in the first mode, the plurality of first legs constitute a plurality of front legs, and when the device is in the second mode, the plurality of second legs constitute the plurality of front legs; At least one first wheel, said at least one first wheel being attached to a distal end of each of the first legs and capable of rolling and rotating; At least one second wheel, said at least one second wheel being attached to a distal end of each of the second legs and being capable of rolling and rotating; A seat, which can be positioned in an unfolded position, wherein it can at least partially accommodate a seated user facing the first direction, and in a folded position, wherein in the folded position, at least a portion of the seat has an orientation different from that of the unfolded position of the seat; A seat folding mechanism that secures the seat to the frame and can move the seat to the folded position when the device is brought from a first mode to a second mode, and move the seat to the unfolded position when the device is brought from the second mode to the first mode; and A rotation prevention mechanism is operable to prevent the plurality of first-round rotations when the seat is brought into the folded position.

[0023] In the aforementioned devices, when the seat is in a higher front seat position, the seat length in the front area of ​​the seat may be shorter compared to when the seat is in a lower rear seat position.

[0024] More specifically, the seat may have a main rear seat portion and an auxiliary front seat portion, and can operate between the following three positions: A lower rear seat position, in which the main seat and auxiliary seat sections are adjacent to each other and aligned horizontally, to provide a predetermined seat length; The higher seat position allows the main seat portion to maintain its orientation when moved from a lower rear seat position; and at least most of the auxiliary seat portion is lower relative to the main seat portion and oriented laterally towards it, thereby reducing the seat length; and In the folded position, the main seat and auxiliary seat parts change their orientation relative to the lower seat position, and their total projected length on the horizontal plane is less than the seat length reduced when the seat is in the elevated position.

[0025] In the aforementioned devices, the seat operating mechanism and the seat folding mechanism can be regarded as a single seat operating and folding mechanism, which can operate to move the seat between a lower seat state and a higher seat state, and between a higher seat state and a foldable seat state.

[0026] According to the sixth aspect of the currently disclosed subject matter, a foldable user support device is provided, configurable for placement on the ground, comprising: A seat having a main rear seat portion and an auxiliary front seat portion, and operable between three positions: A lower rear seat position, wherein the main seat portion and the auxiliary seat portion are arranged adjacent to each other and aligned to a lower rear seat position, wherein the main seat portion and the auxiliary seat portion are arranged adjacent to each other and aligned, and a predetermined seat length is provided along a horizontal plane; A higher seating position, wherein the main seat portion maintains its orientation when moved from a lower rear seat position; and at least a majority of the auxiliary seat portions are lower relative to the main seat portion and laterally oriented thereto, thereby reducing the seat length; and In a folded position, wherein the main seat portion and the auxiliary seat portion have changed their orientation relative to the lower seat position, and their total projected length on the horizontal plane is less than the seat length reduced in the higher position; and A seat operating and folding mechanism configured to move the seat between a lower seat state and a higher seat state, and between the higher seat state and the folded state.

[0027] The apparatus of each of the above aspects may further have each of the features described below.

[0028] When the seat is in the lower rear seat position, the main seat portion and the auxiliary seat portion are arranged side-by-side, allowing both portions to accommodate a seated user in the lower rear seat position. The auxiliary portion is at least indirectly operable via the seat control mechanism to change its orientation to reduce the seat length. When the seat is moved to the higher front seat position, only the main portion is allowed to accommodate a seated user in the higher front seat position.

[0029] The main seat portion may have the same orientation in both the higher and lower positions, enabling it to support a user in both positions.

[0030] When the seat is in the higher front seat position, the auxiliary seat portion can be positioned lower than the main seat portion and oriented laterally thereto.

[0031] The seat control mechanism may include at least one piston configured to store energy when the seat is moved to the lower rear seat position and to release the stored energy when the seat is moved to its higher front seat position.

[0032] The at least one roll-off prevention mechanism includes a roll-off prevention member and a roll-off prevention triggering member, the roll-off prevention member being associated with each of the first wheels and operable between a rollable state in which the front wheels are rollable and a roll-off braking state in which the front wheels are prevented from rolling; when the seat is thus brought to the higher front seat position, it can be activated at least indirectly through the seat operating mechanism and is operable to put the roll-off prevention triggering member into the roll-off braking state.

[0033] At least one rotation prevention mechanism is operable to change the state of the first wheel from a rotatable state when the seat is in a lower rear seat position to a rotation braking state, in which the first wheel is prevented from rotating when the seat is in a higher front seat position.

[0034] At least one first rotation prevention mechanism may include a rotation braking mechanism associated with a first wheel and operable between a rotatable state and a rotation braking member, the rotatable state allowing the first wheel to rotate, and the rotation braking member preventing the first wheel from rotating. At least one first rotation prevention mechanism may include a rotation prevention trigger member, the rotation prevention trigger member being at least indirectly activated when the rotation prevention trigger member brings the rotation prevention member into the rotation prevention state, and the rotation prevention trigger member being operable to bring the rotation braking member into the rotation braking state.

[0035] The frame may be rigid, at least its legs may be optional, and the entire frame may be non-foldable.

[0036] The seat control mechanism can be connected to the first leg of the frame.

[0037] The roll-off prevention mechanism and the rotation prevention mechanism may include several activation elements extending into the foreleg, which are connected to the seat control mechanism via the activation elements.

[0038] The lower portion includes the first leg and the second leg, as well as a reinforcing rod connecting the plurality of second legs.

[0039] The frame includes a right frame member and a left frame member, each having a lower frame member portion and an upper frame member portion, the lower frame member portion having a first and a second leg.

[0040] The device also includes a pair of expandable user support arms connected to the upper portion of the plurality of frame members and switchable between a lower arm position and an extended arm position, in which a portion of the plurality of arms is located on the upper portion of the plurality of frames for use when the device is in the first mode, and in the extended arm position for use at least when the device is in the second mode.

[0041] All mechanisms of the device can be operated without electrical connections and power supply.

[0042] With the seat folded down, at least most of the seat can extend along the frame on the side of the unit.

[0043] The at least one rolling prevention mechanism and the at least one first rotation prevention mechanism can be executed simultaneously.

[0044] The device may include a backrest that maintains its orientation when the seat is in a lower rear seat position and a higher front seat position, wherein the seat is positioned further away from the backrest than in the lower rear seat position.

[0045] The backrest is operatively connected to the frame to move between: a backrest position in which the backrest is spaced rearward from the seat and is at least substantially above the plane defined by the seat, with the seat laterally oriented toward said plane when the seat is in the rear-lower position; and a backrest folded position in which the backrest is positioned beside the seat and extends along the seat when the seat is in the folded position.

[0046] The device may further include a backrest folding mechanism operable to move the backrest between an unfolded state and a folded state. The backrest folding mechanism may be operatively connected to the seat folding mechanism, thereby activating the seat folding mechanism when the backrest folding mechanism is actuated.

[0047] When the frame includes frame members having the above-described upper and lower portions, the backrest can be connected to at least the upper portion of the frame members.

[0048] The backrest and backrest folding mechanism allow the backrest to form a plane defined by the seat when in the unfolded position; when in the position behind and below the seat, the angle is a first angle; when in the folded state, the backrest forms a second acute angle with the plane, the second acute angle being smaller than the first angle. In the folded position, most of the backrest extends along the frame in the side view of the device.

[0049] According to the seventh aspect of the currently disclosed subject matter, a bidirectional user support device is provided, operable between a first chair mode and a second roller mode, wherein in the first chair mode, the device can roll in a first direction with a user seated thereon; and in the second roller mode, the device can roll in a second direction opposite to the first direction with a standing user facing the second direction, the device comprising: A frame having an upper portion and a lower portion, wherein when in a first mode, a pair of first legs constitute a plurality of front legs of the device, and when in a second mode, a pair of second legs constitute the plurality of front legs of the device, the plurality of legs having a plurality of wheels at their distal ends, and the plurality of legs extending downward from the upper portion; A seat attached to the frame and capable of being positioned in an unfolded position and a folded position, wherein in the unfolded positions it can at least partially accommodate a seated user facing the first direction, and in the folded position at least a portion of the seat has an orientation different from that of the unfolded position. A backrest, operably separately connected to the frame from the seat, such that the backrest can be brought into an extended position and a folded position to provide back support for the user, wherein in the extended position at least most of the backrest is positioned above the frame and the seat, and in the folded position at least most of the backrest extends along the frame in a side view of the device; and A backrest folding mechanism, operable to fold the backrest between an unfolded position and a folded position, wherein the unfolded position is when the device is in a first mode, and the folded position is when the device is in a second mode; and A seat folding mechanism that attaches a seat to the frame and is activated at least indirectly through the backrest folding mechanism, and is operable to move the seat to the folded position when the backrest is in its folded position, and to move the seat to the unfolded position when the backrest is in its unfolded position.

[0050] When the backrest of the sixth aspect device is in the unfolded position, it can form a first angle with the plane defined by the seat. When the backrest is in the lower rear seat position, in the folded state, the backrest forms a second acute angle with the plane, the second acute angle being smaller than the first angle. When the backrest is in the folded position, at least most of it can extend along the frame.

[0051] In the sixth aspect of the device, the first wheel of the first and second legs can roll and rotate.

[0052] The device may also include a seat control mechanism operable to move the seat between a higher front seat position and a lower rear seat position, in which the user sits, the higher front seat position constituting the unfolded position of the seat, which may be in an unfolded position.

[0053] The device may further include at least one roll-off prevention mechanism to prevent the first wheel from rolling on the ground when the seat is in its higher forward position. Optionally or additionally, the device may include at least one first rotation prevention mechanism operable to prevent rotation of the first wheel when the seat is in its higher forward position. In both cases In this type of device, the orientation of the seat in the folded position differs from that in the forward-facing, higher seat position and the lower rear seat position.

[0054] In this device, when the seat folding mechanism is in the folded position, the seat folding mechanism can activate the second rotation prevention mechanism to prevent the first rotation.

[0055] Therefore, this device can operate in the following three modes: In a neutral mode, the seat is positioned in a higher rear seat position, the backrest is in the unfolded position, and the front wheels cannot roll or rotate. A first chair mode, in which the seat is located in a lower, rearward position, the backrest is in the same unfolded position as in the neutral mode, and the front wheels are allowed to roll and rotate, enabling the device to roll in a first direction, while the user sits in the seat facing that first direction; and A second roller mode, in which the seat and backrest are in a folded position, the front wheel acts as the rear wheel of the roller and is prevented from rotating, while the rear wheel acts as the front wheel of the roller, enabling the device to roll in a second direction opposite to the first direction, with the standing user facing the second direction.

[0056] In this type of device, when the seat is in a higher forward position, its length can be shorter in the front area compared to when it is in a lower rear position. More specifically, the seat may have a main rear seat portion and an auxiliary front seat portion, and can operate between three positions: A lower rear seat position, in which the main seat portion and the auxiliary seat portion are adjacent to each other and aligned horizontally to provide a predetermined seat length; A higher seating position allows the main seat portion to maintain its orientation when moved from a lower rear seat position; and at least most of the auxiliary seat portion is lower relative to the main seat portion and oriented laterally towards it, thereby reducing the seat length; and In the folded position, the main seat and auxiliary seat parts change their orientation relative to the lower seat position, and their total projected length on the horizontal plane is less than the seat length reduced when the seat is in the elevated position.

[0057] In this device, the seat operating mechanism and the seat folding mechanism can be regarded as a single seat operating and folding mechanism, operable to move the seat between a lower seat state and a higher seat state, and between a higher seat state and a foldable seat state.

[0058] As described above, in each of the aforementioned aspects, the mechanisms can be interconnected individually or at least primarily through mechanical connections, such that each mechanism is mechanically activated or is mechanically activated by at least one other mechanism of the device, or at least indirectly and simultaneously by at least one other mechanism of the device, thereby making the device easy to use. That is, the user does not need to coordinate / control the operation of the mechanisms in different operating modes of the device. In particular, the backrest folding mechanism can be operated to mechanically activate the seat folding mechanism to bring the seat from its higher forward seat position into its folded state, or vice versa, so that the device can be used in roller mode. One of these two mechanisms is activated first, bringing the device into the folded state, and can be manually activated, for example, by the user pulling the backrest or pushing the seat, or using control buttons. The backrest folding mechanism or seat folding mechanism can be operated to mechanically activate the corresponding anti-rotation mechanism, preventing the first / front leg of the device from rotating in the folded state, facilitating its use as a roller. The seat control mechanism can be activated by the user lifting themselves up with the help of the device's arm or by pressing the control button. It can mechanically activate the roll prevention mechanism and the corresponding anti-rotation mechanism. When the seat is in a high front seat position, it brakes / locks the first / front wheel, thus providing the user with safe support when sitting or standing.

[0059] As described above, in each of the above aspects, at least some of the mechanical components connecting different mechanisms, such as components involving anti-rolling and anti-rotation, can be configured within the frame.

[0060] In all the above aspects, each first wheel of the device, i.e. a wheel that can be operated as a front wheel when the device is in a neutral or first chair mode, can be associated with a caster assembly including a rotating caster support wheel and is operable to allow the wheel to rotate; including an assembly comprising at least one rolling prevention mechanism configured to prevent the wheel from rolling and at least one rolling prevention mechanism operable to prevent the wheel from rotating.

[0061] In the caster assembly described above, the at least one rotation prevention mechanism may be a first rotation prevention mechanism, and the assembly may further include at least one second rotation prevention mechanism, which may be executed independently of the first rotation prevention mechanism.

[0062] Each of the first and second anti-rotation mechanisms is operable, and after its portion rotates to the first and second predetermined angles, it locks the caster in the rolling direction, respectively. The first and second angles are different.

[0063] Therefore, according to a further aspect of the currently disclosed subject matter, a caster assembly is provided for securing a wheel assembly consisting of swivel casters configured to connect to a wheel and operable to allow the wheel to rotate; the assembly includes at least one roll-off prevention mechanism configured to prevent the wheel from rolling and at least one roll-off prevention mechanism operable to prevent the wheel from rotating.

[0064] The at least one rotation prevention mechanism may be a first rotation prevention mechanism, and the component further includes at least one second rotation prevention mechanism, which may be performed individually and independently of the first rotation prevention mechanism.

[0065] Each of the first and second anti-rotation mechanisms is operable, and after its portion rotates to the first and second predetermined angles, it locks the caster in the rolling direction, respectively. The first and second angles are different.

[0066] The at least one rolling prevention mechanism and the at least one first rotation prevention mechanism can be executed simultaneously. Attached Figure Description

[0067] To better understand the subject matter disclosed herein and to illustrate how it can be implemented in practice, several embodiments are described hereby with reference to the accompanying diagrams, by way of unrestricted examples, wherein: Figure 1 This is a perspective view of a scrollable user support device located at a lower seating position according to several exemplary embodiments of the present invention.

[0068] Figure 2 Is it like this? Figure 1 The view shown depicts the device in a higher seating position.

[0069] Figure 3 Is it like this? Figure 2 The view shown indicates that the device includes a backrest and armrests.

[0070] Figure 4 yes Figure 3 Side view.

[0071] Figure 5 This is a perspective view of the device in a roller mode.

[0072] Figure 6 yes Figure 5 Side view.

[0073] Figures 7-9 This is a side / interior view of one embodiment of the device in its three modes; wherein the three modes are low chair mode, high chair mode, and wheel mode.

[0074] Figure 10This is a perspective view showing the device at its central fold position.

[0075] Figure 11 yes Figure 10 Side view.

[0076] Figure 12 In scroll wheel mode, for example Figure 1 and Figure 2 The view shown.

[0077] Figures 13-15 This is a side / interior view of one embodiment of the device in its three modes: low chair mode, high chair mode, and wheel mode.

[0078] Figure 16A and Figure 16B These are perspective and side views of an embodiment of a caster of the device in rolling and rotating states, respectively.

[0079] Figure 17A and Figure 17B They are Figure 18A and Figure 18B Perspective and side views of the casters in the enabled rolling and anti-rotation state, wherein the casters are configured to be aligned with the rolling direction of the device.

[0080] Figure 18A and Figure 18B They are Figure 18A and Figure 18B Perspective and side views in scroll-preventing and rotation-preventing states.

[0081] Figures 19-21 This is a side / interior view showing several folding mechanisms of one embodiment of the device.

[0082] The following detailed description of several embodiments of the present invention refers to the accompanying drawings. The dimensions of the components and features shown in the drawings are chosen for convenience or clarity and are not necessarily shown to scale. Where possible, the same reference numerals will be used throughout the drawings and in the following description to refer to the same and similar components. Detailed Implementation

[0083] The following describes illustrative embodiments of the invention. For clarity, it is not necessary to describe all features / components in the actual implementation.

[0084] Figure 1 and Figure 2 A scrollable user support device is shown, which can be designed to support a user in a (“lower”) chair seating position. Figure 1or an elevated sitting position ( Figure 2 A lower seating position can be used in a variety of implementations, including as a rolling and swivel chair, as an office chair and a conveniently mobile chair, and in compact spaces such as bathrooms. This can be useful for positioning people with disabilities or mobility issues near toilets or car seats. A higher seating position helps support users who wish to be in a relatively elevated position, such as when talking to someone standing, or facing a kitchen or bathroom sink or talking to someone nearby. A higher position also helps users stand up.

[0085] Alternatively or additionally, the rollable user support device may be designed to allow specific control of the wheels, front wheels, and / or rear wheels. In particular, the user support device may be configured to allow combinations of rolling and / or rotation options, especially through one or more wheel control mechanisms, in some designs the wheels are associated with specific seat positions.

[0086] The rollable user support device includes a rigid frame 20 comprising left and right frame members fixedly connected to each other (e.g., by frame reinforcing rods), having an upper portion and a lower portion, the lower portion consisting of front legs 22 and rear legs 24. Each front leg has a distal end 26, wherein at least one front wheel 28 is disposed at these distal ends. Each rear leg 24 has a distal end 26, wherein at least one rear wheel 32 is disposed at these distal ends. These wheels are described as single wheels; however, they may consist of a set of wheels, such as a pair of wheels. At least the front wheels 28 can be configured to be both rollable and rotatable, as will be described in further detail below, see Figure 18- Figure 21 For example, the front legs 22 and rear legs 24 may include swivel casters 34 to provide rolling and swivel functions, as is well known; however, at least one particular caster design will refer to Figure 18- Figure 21 This will be explained in detail below.

[0087] Frame 20 has a seat 36 operably connected thereto. Seat 36 can be a single seat or a multi-part seat, such as the two-part seat illustrated. Seat 36 can be configured to be positioned in a lower rear seat position. Figure 1 ) and higher front seat position ( Figure 2In this design, the device includes a seat operating mechanism 100 configured to adjust the seat between a lower rear seat position and a higher front seat position. The seat operating mechanism 100 can be electrically operated; however, in certain designs, it can be operated entirely mechanically. The initial position of the device (specifically seat 36) is a higher seat position, ready for the device to be seated in a lower seat position (chair mode) and ready to fold into a folded position (roller mode). The initial position can be lowered to the lower seat position via the seat operating mechanism 100, and once the user is seated, it can be actuated by the user's weight / force.

[0088] In the case of a two-part seat 36, the seat includes a rear seat portion 38 (which may be alternately referred to as the main seat portion 38 in this specification and claims) for supporting the user's hips; and a forward seat portion 40 (which may be alternately referred to as the auxiliary seat portion 40 in this specification and claims) designed to provide support for the user's thighs in a lower sitting position. In this two-part configuration, in the higher position ( Figure 2 The forward-facing seat section 40 is designed to fold downwards. As can be seen, the rear seat section 38 maintains its orientation relative to the ground while moving from its lower position to its higher position (and vice versa) – typically horizontal. In a special design, the seat operating mechanism 100 is configured to fold the two sections of the seat, as described below, see [link to relevant documentation]. Figures 7-9 .

[0089] The device may also include at least one rotation prevention mechanism 300 configured to prevent the front wheels 28 from rotating (in some designs this is independent, in some designs it is integrated with the position of the seat 36, particularly when the seat is in the raised position, as described below). The rotation prevention mechanism 300 may be composed of known methods or may use specific designs, as described below, see Figures 16-18.

[0090] The device may also include at least one roll-off prevention mechanism 200 configured to prevent the front wheels 28 from rolling when the seat is in the raised position. Such a configuration may be advantageous in providing a stable base for a user in a higher position, such as when near a kitchen / bathroom sink or similar location. The roll-off prevention mechanism 200 may employ known methods or a specially designed, fully mechanical approach, as described below, see Figures 16-18.

[0091] In some designs, the rollable user support device is configured to include a seat operating mechanism 100 and a roll-off prevention mechanism 300. In some designs, the rollable user support device is configured to include a seat operating mechanism 100 and a roll-off prevention mechanism 200. In some designs, the rollable user support device is configured to include a seat operating mechanism 100; an anti-rotation mechanism 300; and a roll-off prevention mechanism 200.

[0092] Any one or all three of the above mechanisms can be operated electrically. However, in a particular design, at least one of the three mechanisms is entirely mechanical; in some particular designs, at least two of the three mechanisms are entirely mechanical; and in some particular designs, all three mechanisms are entirely mechanical.

[0093] In a specific example, the seat control mechanism 100 is user-operable, while the roll-off prevention mechanism 200 and the anti-rotation mechanism 300 are directly or indirectly operated by the seat control mechanism 100. Therefore, changes in seat position trigger changes in the state of the front wheels 28. Thus, when the device is in its initial state (“elevated seat,” neutral / ready-to-use mode), with the seat 36 in a raised forward position, at least the front wheels 28 cannot roll or rotate until the seat is lowered to a lowered position (as a normal rollable seat), where the front wheels are rollable and rotatable (released from their anti-roll and anti-rotation states). When the user (e.g., by shifting their center of gravity forward and rising) causes the seat control mechanism 100 to begin raising the seat 36, the seat control mechanism at least indirectly causes the roll-off prevention mechanism 200 and the anti-rotation mechanism 300 to prevent the device from rolling and rotating. The seat control mechanism 100 can be controlled by the user's center of gravity and / or system.

[0094] like Figure 2 and Figures 7-9 As shown, the seat control mechanism 100 includes a pair of seat portion accessory brackets 102 connected between the rear seat portion 38 and the front seat portion 40. The seat portion accessory brackets 102 are rotatably attached to the rear seat portion 38 at a relatively forward position. The seat control mechanism 100 also includes rotation prevention triggering components (104) in the form of a pair of forward seating portion-to-frame connection brackets 104, rotatably attached at their upper ends to the front or side of the forward seat portion 40, for example, to the pivot points of the seat portion accessory brackets 102. At their lower ends, the brackets 104 are rotatably attached to the frame 20.

[0095] The seat control mechanism 100 also includes a pair of frame-to-rear seating linkages 106 that rotatably connect the frame 20 to the rear seat portion 38, located behind the seat portion accessory bracket 102. Linkages 106 may include a set of pivotally connected link segments (shown in three numbers), including a lower link portion 110; an intermediate link 112; and an upper link 114, wherein the intermediate link is pivotally connected at its respective ends to the lower and upper links.

[0096] A seat accessory bracket 102 of appropriate length can be selected, combined with a front seat section to frame connecting bracket 104 of appropriate length and frame to rear seat link 106, to ensure that when the seat 36 is operated, the rear seat section 38 remains in a roughly horizontal position, as described above, the seat 36 moves from a lower rear position to a higher forward position (and vice versa).

[0097] The seat control mechanism 100 can be driven manually, for example by a crank or similar device; or it can be driven mechanically, for example by a spring.

[0098] However, in certain special designs, the seat control mechanism 100 includes a pneumatic seat motion assist mechanism, which includes at least one piston 108. Figure 3 Typically, this consists of a pair of pistons 108. The pistons 108 can store energy in their contracted state, which can be used to lift the seat 36, thereby helping the user rise from the seat or reach their seat position. Conversely, relatively elongated pistons 108 are also useful in helping the user sit in a lower position, as the pistons can be configured to compress slowly, thus alleviating the need for the user to support their weight with their legs and / or arms when entering a lower (normal) sitting position.

[0099] The piston 108 is rotatably attached to the lower end of the frame 20 and rotatably attached to the upper end of the side or bottom of the rear seat portion 38, typically located at the opposite rear of the rear seat portion.

[0100] The above reference Figure 1 and Figure 2The illustrated device converts a chair into a roller / walking aid by functioning the front wheels of the chair as rear wheels in roller mode. This is functionally operable in conjunction with the foldability of the seat. Specifically, the device may include an operable seat folding mechanism to cause the seat (particularly its rear seat portion) to fold from a higher position when the front wheels are stopped, wherein the seat, or at least its rear seat portion, is folded in a position substantially parallel to the upper part of the frame. The seat folding mechanism may be at least indirectly connected to a wheel control mechanism to prevent the roller wheels (now acting as rear wheels) from rotating when the seat enters the folded state. In particular, when the rollers are rolling, the rear wheels of the rollers are aligned with the frame.

[0101] Figures 3-6 A bidirectional scrollable user support device is shown, which can be in an elevated seating position (configured to face the user in the first direction 42) (see...). Figure 2 The device can be adjusted between a first mode (chair) and a second mode (wheel / walking aid) (configured so that the user can walk upright and receive support while facing a second direction 44 opposite to the first direction). In other words, the two-way user support device can operate and manipulate in both the first mode (chair) and the second mode (wheel / walking aid). The first mode (chair) allows the user to sit in their seat or in a higher position. Figure 2 The middle wheel is fixed; or the seating position is low. Figure 1 In one mode, the bidirectional rollable user support device can roll on the ground along a first direction 42, on which the user sits. In the second mode (roller / walking aid), the bidirectional rollable user support device can be rolled on the ground along a second direction 44 by a standing user.

[0102] The bidirectional rollable user support device is configured to operate and manipulate between a first mode (chair) and a second mode (roller / walking aid). In the first mode, the device can roll on the ground in a first direction 42 while the user sits on it. In the second mode, the device can be rolled by a user standing on the ground in a second direction 44, which is opposite to the first direction.

[0103] Two-way scrollable user support device includes reference Figure 1 and Figure 2 The components include: frame 20; front legs 22; rear legs 24; swivel casters 34, having a rollable and rotatable front wheel 28 and a rollable rear wheel 32 (also rotatable in this case); and seat 36.

[0104] Since the device is bidirectional, the "front wheel" will be referred to as the "first wheel" 28a; the "rear wheel" will be referred to as the "second wheel" 32a.

[0105] When the two-way scrollable user support device is in the first mode (chair or elevated chair); Figure 3 and Figure 4 The "first wheel" 28a serves as the "front wheel" and is configured to roll and rotate, with the user seated and facing the first direction 42.

[0106] When the two-way scrollable user support device is in the second mode (roller / walking aid); Figure 5 and Figure 6 Now, the "second wheel" 32a acts as the "front wheel" and is configured to roll and rotate, with the user standing and facing the second direction 44.

[0107] Although frame 20 can be designed to provide support for the user when standing (e.g., for relatively short users to use the wheels); Figure 12 (or in which the frame is relatively high), for ease of roller / walker configuration, bidirectional rollable user support devices typically include a pair of upwardly extending user support arms 46 with handles 48. In one particular design, the frame 20 includes a pair of extended arm receiving recesses 50 ( Figure 6 The arm is configured to receive arm 46 and to have a mechanism for allowing the arm to extend and locking the arm at a selected extension position. Such an arm locking mechanism is well known and will not be described here.

[0108] The bidirectional rollable user support device includes a seat operation and folding mechanism 400, which operably attaches the seat 36 to the frame 20. Mechanism 400 is configured in a first (expanded) state. Figure 3 and Figure 4 ) and the second (folded) state ( Figure 5 and Figure 6 The seat 36 is moved between the two positions. The first (unfolded) state is the first mode of the device when the seat is in the raised position, and the second (folded) state is the second mode of the device (roller / walking aid).

[0109] The seat operating and folding mechanism 400 can be configured in known ways, including electrically or through a specific fully mechanical design. In such a mechanical design (where there is no backrest), the same seat operating mechanism 100 can be used. To fold the seat, the user can press the forward-facing seat portion 40 backward in the direction of arrow 402. Figure 8 Therefore, the rear seat section 38 will fold like a book, along with the forward seat section ( Figure 9 All of them were moved to a non-horizontal direction.

[0110] The bidirectional rollable user support device also includes a wheel control mechanism 300, which is configured to rotate at least the first wheel 28a when the device is in the initial mode. Figure 3 and Figure 4 ); and cause the second wheel 32a to rotate, while preventing the first wheel from rotating when the device is in roller / walking aid mode. Figure 5 and Figure 6 The wheel control mechanism 300 can be configured in known ways, including electrically, or through a specific fully mechanical design, as described below, with reference to Figures 16A-18B . Figure 3 and Figure 4 The device shown has a backrest 52 and armrests 54, which may or may not be part of the device, and may be in the position of the seat when folded or not.

[0111] Figures 7-13 A bidirectional rollable user support device is shown, wherein the backrest 52 can be folded together with the seat. The bidirectional rollable user support device is configured to operate and be operable between a first mode (chair) and a second mode (rollers). In the first mode (chair), the device is configured to accommodate a seated user facing a first direction; in the second mode (rollers), the device can roll in a second direction opposite to the first direction and is configured to support a standing user. Specifically, the position of the seat 36 and backrest 52 relative to the frame 20 is controlled. This positioning of the seat and backrest may be advantageous to the user, for example, but not limited to any practical implementation, providing better visibility and / or a more compact folding, which may be useful for the storage and / or transport of the device.

[0112] The bidirectional rollable user support device includes a frame 20 having front legs 22 and rear legs 24 connected thereto. At least one first wheel 28a is attached to the distal end 26 of each front leg 22, configured at least for rolling and optionally for rotating. At least one second wheel 32a is attached to the distal end 26 of each rear leg 24, configured for both rolling and rotating. A seat 36 is operatively attached to the frame 20. A backrest 52 is operatively connected to the frame 20, either directly (i.e., the frame may be suitably configured) or via armrests 54 or other means.

[0113] The bidirectional rollable folding seat support device also includes a seat and backrest folding mechanism 600 configured to fold and unfold the seat 36 and backrest 52, and operably attach the seat 36 and backrest 52 to the frame 20. The backrest 52 is configured to be at least indirectly connected to the seat and backrest folding mechanism 600, operable to move the backrest 52 between a first (unfolded, user backrest) state in a first mode (chair) of the device, wherein the backrest is at least partially positioned above the frame 20. Figure 7 and Figure 8 The second (folded) state of the device (walking aid) in its second mode, wherein at least a portion of the frame 20 is above the backrest. Figure 9 ).

[0114] Figure 10 and Figure 11The seat and backrest folding mechanism 600 shown is in an intermediate state between its elevated seat position and its folded position in the bidirectional rollable seat folding user support device. It can be observed that as the seat 36 is folded, the backrest 52 is lowered and also moves to a position substantially parallel to the seat, and to the upper part of the frame 20, as... Figure 5 and Figure 6 As shown.

[0115] The seat back folding mechanism 600 can be operated electrically; however, in certain designs, the mechanism 600 is entirely mechanical. In such a mechanical design, the seat and back folding mechanism 600 may include a seat operating mechanism 100 and components configured to arrange the backrest position 52.

[0116] Reference Figures 19-21 The illustration depicts a seat back folding mechanism 600, which includes a seat operating mechanism 100, wherein the seat operating mechanism 100 is part of the mechanism 600.

[0117] Figure 19 The diagram illustrates the initial state of the seat and backrest folding mechanism 600 before folding, with the seat 36 in its raised position and the backrest 52 in the user backrest support position. The backrest 52 is rotatably connected to the armrest 54, and the armrest 54 is rotatably connected to the frame 20. Figure 20 In the middle, seat 36 and backrest 52 are in the early stages of folding and conversion. Figure 21 In the middle, the seat 36 and backrest 52 are fully folded and are placed in a substantially parallel arrangement (at a 20-degree angle in some designs), and are also substantially parallel (at a 20-degree angle in some designs) with the upward extension 21 of the upper part of the frame 20. Figures 7-9 A similar folding position is illustrated. In a design without a backrest 52 or armrests 54, the folding position of the device is as follows: Figure 12 As shown.

[0118] The seat and backrest folding mechanism 600 includes multiple linkages, such as three linkages, including an upper linkage 602 rotatably connected at its upper end to the frame 20 and fixedly connected to the armrest 54. An intermediate linkage 604 rotatably connects at its upper end to the lower end of the upper linkage 602. The upper end of a lower linkage 606 is rotatably connected to the lower end of the intermediate linkage 604, and its lower end is connected to a connecting bracket 104 of the seat operating mechanism 100. The intermediate linkage 604 has an elongated slot 608 that receives a pivot pin 610, which is fixed to an upwardly extending portion 21 of the frame 20.

[0119] The connecting bracket 104 has a folding mechanism pin 612 ( Figure 19The pin 612 is configured to slide along the upper edge of the lower link portion 110 between the bend or curve of the lower link portion 110 and the pin receiving groove 614 at the upper end of the lower link portion 110. In the elevated seat position, the pin 612 is located near the bend / curve of the lower link portion 110, and in the folded state (roller) of the device, the pin 612 is positioned in the groove 614.

[0120] For the folding mechanism, namely the folding seat 36 and backrest 52 (and armrests 54), the user pulls the backrest upwards in the normal direction 601 ( Figure 19 Therefore, the upper link 602 moves clockwise 603, causing the upper end of the middle link 604 to move in a direction similar to 601, thereby rotating clockwise about the rotating pin 610. Consequently, the lower end of the middle link 604 moves in the opposite direction (to the left in the figure), thereby pulling the lower link 606. Since the lower link 606 is connected to the connecting bracket 104, which is rotatably connected to the frame 20 at its lower end, the bracket 104 turns towards the backrest 52. When in the fully folded state, the pin 612 is received in the groove 614, thereby reversibly securing the folded state, and the device is ready for use as a roller.

[0121] Figures 13-15 This displays a foldable user support unit including a frame 20; front legs 22; rear legs 24; and a seat 36 operably connected to the frame. The seat 36 has a rear seat portion 38 and a front seat portion 40, and is configured to be maneuverable between three states: (a) a lower seat state (… Figure 13 (a) The rear seat portion 38 and the front seat portion 40 are substantially aligned; (b) Elevated seat position ( Figure 14 ), wherein the rear seat portion 38 and the front seat portion 40 form an angle with each other at a first angle 56; and (c) folded state ( Figure 15 ), wherein the rear seat portion 38 and the front seat portion 40 are at a second angle 58 to each other, and the second angle 58 is smaller than the first angle 56.

[0122] The foldable user support unit also includes a seat folding mechanism 700, configured to be in a lower seat position ( Figure 13 ) and higher seat position ( Figure 14 The seat 36 can be moved between the higher seat position and the foldable seat position. Figure 15 Move the seats 36 between each other.

[0123] Figures 16-18 show a caster assembly including a swivel caster 34 with a caster axle 62, wherein the caster assembly is configured to allow the wheel to rotate. The caster assembly includes a rolling and rotation control mechanism 800 configured to allow the wheel 28 to roll and prevent its rotation. In a particular design, the rotation control mechanism 800 is configured to prevent both rolling and rotation of the wheel 28.

[0124] The roll control mechanism 800 can be composed of an electronically controlled mechanism; however, in certain designs, it is a completely mechanical mechanism, such as... Figures 16A-16B As shown in Figures 17a-17b and 18a-18b, the rolling and rotation control mechanism 800 includes a rolling prevention mechanism 200 and a rotation prevention mechanism 300. Furthermore, the fully mechanical rotation control mechanism 300 may consist of a mechanism configured to immediately prevent wheel rotation, for example, by means of a clamp or other such means.

[0125] The roll-off prevention mechanism 200 is integrated with and / or associated with the swivel caster 34 and the caster axle 62. The caster axle 62 has a longitudinal tunnel 202 extending therethrough and is configured to receive a roll brake lever 204, which may resemble a woodworking nail with heads on both sides. At its lower end, the roll brake lever 204 is attached to the proximal end of the roll-off prevention member 206 in the form of a roll brake lever 206. At its upper end, the roll brake lever 204 is connected to a roll brake actuator 208.

[0126] An example of a rolling brake lever 206 is a seesaw-like lever rotatably attached to a swivel caster 34, for example, around the midpoint of the lever, with a brake pad 210 at the free end of the lever 206. At its upper end, a rolling brake actuator 208 is attached to one end of a rolling brake actuator cable 212 (the right end of cable 212 in the diagram). The lower part of the rolling brake actuator 208 is rotatably attached to a frame 20.

[0127] The roll-off prevention mechanism 200 also includes a roll-off brake spring 214 (described below) located between the roll-off brake actuator 208 and the rotary pin insertion lever 310, the rotary pin insertion lever 310 being designed to drive a mechanism that restricts wheel rotation, as described below. A cable 212 may pass longitudinally through the (coil) spring 214.

[0128] exist Figure 16B and Figure 17BIn this configuration, the rolling brake spring 214 causes the rolling brake actuator 208 to rotate downwards (clockwise in the diagram), thereby lowering the rolling brake lever 204. Consequently, the rolling brake lever 206 swings (counterclockwise in the diagram), creating a gap between the brake pads 210 and the wheel 28. Therefore, the wheel 28 may roll.

[0129] Conversely, when cable 212 pulls the rotary rolling brake actuator 208 to rotate the rolling brake actuator (counterclockwise in the diagram) and raise the top of the rolling brake actuator (compressing spring 214), it prevents wheel 28 from rolling. This causes rolling brake lever 204 to move upward, so brake lever 206 swings (clockwise in the diagram) forcing brake pad 210 downward to prevent wheel 28 from rolling.

[0130] Cable 212 is attached at its distal end (left end in the figure) to a roll-off prevention triggering member 218 (in the form of a roll-off prevention drive member 218), which is fixed at a predetermined angle relative to the linkage portion 110 of the seat operating mechanism 100.

[0131] Reference Figures 7-9 Now, the relationship between the height of the seat 36 and the rolling of the wheel 28 is described. When the seat 36 (particularly the rear portion 38) moves from its lower rear position ( Figure 7 Move it to its higher front position. Figure 8 When the rolling prevention mechanism 200 is activated, it prevents the wheel 28 from rolling.

[0132] Moving to a higher seating position, i.e., when the user rises from a fully seated position to a semi-seated position, link 106 moves from... Figure 7 Move the position in the middle to Figure 8 The position in the middle. This movement causes the connecting rod 110 to rotate clockwise and pulls the cable 212, preventing the wheel 28 from rolling. Figure 18B When moving from a higher seat position to a lower seat position, the linkage portion 110 moves counterclockwise, thus allowing the wheel 28 to roll. Figure 18B and Figure 19 ).

[0133] Referring now to Figures 16-18, the rotation prevention mechanism 300 is described. In a particular design, the rotation prevention mechanism 300 can be configured to provide two levels of rotation prevention. The first level of rotation prevention is provided by a first rotation prevention mechanism 300a, in which the caster 34 can only rotate a relatively limited amount, for example, up to 30 degrees, before being stopped. The second level of rotation prevention is provided by a second rotation prevention mechanism 300b, in which the caster can be rotated to align with the direction of rotation and then further rotation is prevented. Limited rotation can be useful for safety purposes because it restricts the movement of the front end of the device when the seat 36 is raised, so that the device stably supports the user.

[0134] First, the rotation prevention mechanism 300a will be described, wherein the caster axle 62 has a plurality (e.g., 12) rotation limiting grooves 302 equally spaced around the axle. For this purpose, the caster axle 62 may include a larger diameter portion 304, wherein the rotation limiting grooves 302 are disposed on a substantially horizontal plane. The rotation limiting grooves 302 are sized to receive rotation prevention members 306 in the form of rotation limiting pins 306, the distal ends of which are adapted to the grooves. The rotation limiting pins 306 are horizontally slidably secured to the same plane as the grooves 302 by pin seats 308.

[0135] At its proximal end, the rotary stop pin 306 interface is connected to the lower end of the rotary stop pin insertion lever 310, so that the insertion lever can push the stop pin into either of the recesses 302 when aligned with it. The rotary pin insertion lever 310 is rotatably connected to the pin seat 308 in a seesaw manner. The upper end of the rotary pin insertion lever 310 interfaces with the roller brake spring 214.

[0136] As described above, when seat 36 is raised, cable 212 is pulled up. In addition to driving the roll-stopping mechanism 200, pulling in cable 212 also drives a limited rotation component. Cable 212 pulls on the roll-stopping actuator 208, which compresses spring 214 to force the rotating pin inserted into the upper end of lever 310 outwards (to the left in the diagram). The rotating pin insertion lever 310 thus rotates (counterclockwise in the diagram), causing the rotation-limiting pin 306 to enter the rotation-limiting groove 302. If the caster 34 rotates to 30 degrees, one of the rotation-limiting recesses will align with the rotation-limiting pin 306, and the pin will enter the aligned groove. Therefore, rotation will be prevented from exceeding a limit, for example, 30 degrees in the exemplary design, where the caster axle 62 has 12 equally spaced grooves 302. Thus, the user will have a stable elevated seat position.

[0137] In this context, the term "swivel prevention" and its derivatives, as used in this specification and claims, and in other similar terms, will be understood as swivel arresting after a predetermined swivel limit (spinning of wheel 28). This predetermined swivel limit is a function of the number of grooves 302.

[0138] The second rotation prevention mechanism 300b will now be described, in which the swivel caster 34 can be rotated until aligned with the rolling direction. Here, the rotation prevention mechanism 300b includes a rotation prevention cable 350 connected to the upper end of a rotation alignment lever 352. The rotation alignment lever 352 is rotatably connected to a pin seat 308 in a seesaw manner, for example, at the same pivot point as the lever 310. The lower end of the rotation alignment lever 352 interfaces with a rotation alignment and prevention pin 354, generally in a horizontal direction. The rotation alignment and prevention pin 354 is disposed on the same plane as a single pin receiving groove 356, wherein the groove 356 is disposed in a larger diameter portion 304. The single pin receiving groove 356 is located in portion 304 so that when aligned with the rotation alignment and prevention pin 354, the wheel 28 tracks the axle 62 behind it. Therefore, in the roller configuration, the wheel 28 rolls parallel (aligned) to the forward movement of the device and is prevented from rotating within a 180-degree range of wheel rotation.

[0139] In this context, the term "swivel prevention" and its derivatives, when used in other or similar terms, will be understood in this specification and claims as swivel arresting after a predetermined swivel limit (rotation of wheel 28). This predetermined swivel limit is no greater than 180 degrees, particularly before the caster 34 of the first wheel 28a is aligned with the frame 20.

[0140] In summary, Figure 16A and Figure 16B The diagram illustrates the state of the rotation and rolling control mechanism 800 in the rotation and rolling start state, i.e., neither the rotation prevention mechanism 300 nor the rolling prevention mechanism 200 is activated. Figure 17A and Figure 17B The illustration shows the situation where the rolling and rotation control mechanism 800 is in the rolling-only state (rotation brake / lock), that is, when the rotation prevention mechanism 300 is operating. Figure 18A and Figure 18BThe diagram shows a roll and rotation control mechanism 800 (roll and rotation brake / lock) in a locked / braked state, which simultaneously drives the rotation prevention mechanism 300 and the roll prevention mechanism 200.

[0141] The bidirectional scrollable user support device with all the above mechanisms will now be described with reference to the above figures.

[0142] This bidirectional rollable device features an "all-inclusive" design with the following characteristics: Three possible seating configurations: (a) lower rear seats (chairs); (b) higher front seats (high chairs); and (c) folding seats and backrests 52 (rollers); these configurations are controlled by mechanisms 600 and 100; and Three possible front wheel states: (a) rolling and fully rotatable (when the seat (36) is in a lower reclined position); (b) the front wheel stops rotating completely after the first wheel 28a has rotated to a predetermined degree (no tilting or swerving; in the seat-raised position); and (c) when the first wheel 28a is aligned with the frame 20, the first wheel initially rolls in the second direction, i.e., the first wheel rotates no more than 180 degrees, until the first wheel is prevented from rotating; the first three wheel states are controlled by mechanisms 200 and 300.

[0143] The movement between the three possible seat states operatively affects three possible first wheel states: (a) the step of moving seat 36 from its lower rear position to its higher front position drives mechanism 100, causing the first wheel state to change from a rollable and rotatable state to a rotation-preventing state (when the seat moves from a higher front position to a lower rear position, and vice versa); (b) the step of moving backrest 52 from its user backrest position to its folded position (roller) drives mechanism 600, causing the first wheel 28 to change from a non-rollable and non-rotatable state to a rollable but non-rotatable state, with the first wheel acting as a rear wheel. Conversely, moving backrest 52 from its folded position (roller) to its unfolded, supported state causes the first wheel 28 to revert to its front wheel function, while these wheels are in an anti-rotation state.

[0144] Specifically, a scrollable user support device is provided, the device including all of the above mechanisms, as shown in the above figures.

[0145] Specifically, the rollable user support device is configured to roll on the ground and includes a rigid frame 20 having a pair of first legs 22 and a pair of second legs 24 (as described above). Each first leg 22 has a first leg distal end 26 to which at least one first wheel 28a is attached, and these wheels are both rollable and rotatable (as described above). Each second leg 24 has a rear leg distal end 26 to which at least one second wheel 32a is attached, and these wheels are both rollable and rotatable (as described above).

[0146] The rollable user support device includes a seat 36 (as described above), operably attached to the frame 20, and positionable in three positions: a lower rear seat position; a forward-raised seat position; and a folded position. A seat folding mechanism (as described above with reference to mechanism 600) is operable to manipulate the seat 36 between the folded and unfolded positions (forward-raised seat position). A seat manipulation mechanism 100 (as described above) is operable to move the seat 36 so that the user sits on it between the lower rear seat position and the higher front seat position.

[0147] At least one roll-off prevention mechanism 200 (as described above) is activated, at least indirectly, by the seat operating mechanism 100, and is operable to prevent the first wheel 28a from rolling on the ground when the seat 36 is raised to the forward elevated seat position. At least one first rotation prevention mechanism 300a (as described above) is activated, at least indirectly, by the seat operating mechanism 100, and is operable to prevent the rotation of the first wheel 28a, at least after preventing the first wheel from rolling in the forward raised seat position. At least one second rotation prevention mechanism 300b (as described above) is driven by the seat operating mechanism 100 in the mechanism 600 and is capable of preventing the first wheel 28a from rotating when the seat 36 is in the folded position.

[0148] The scrollable user support device is a two-way scrollable user support device that can operate in the following three modes: (a) Neutral mode, in which seat 36 is in the front elevated position and first wheel 28a cannot roll or rotate; (b) First mode (chair mode), wherein the seat 36 is in a downward rearward position, the first wheel 28a allows rolling and rotation (thus forming the chair front wheel 28), enabling the device to roll in the first direction 42, while the user is accommodated in the seat 36 facing the first direction; and (c) Second mode (roller mode), wherein the seat 36 is in the folded position, the first wheel 28a is prevented from rotating, and the second wheel 32a acts as the front wheel of the roller, enabling the device to roll in the second direction 44 opposite to the first direction 42, with the standing user facing the second direction.

[0149] In some designs, the backrest 52 (as described above) is operatively connected to the frame 20 to move between (a) an unfolded position and (b) a folded position, wherein in (a) the unfolded position, the backrest is rearwardly spaced from the seat 36, and at least a majority of the backrest is positioned above the plane defined by the seat, with the backrest laterally facing said plane when the seat is lowered. In (b) the folded position, the backrest is positioned beside the seat, and extends along the plane of the seat when the seat is folded. A backrest folding mechanism 600 is operable to move the backrest 52 between the unfolded and folded states.

[0150] In some designs, a backrest folding mechanism (as described in mechanism 600 above) is operatively connected to a seat folding mechanism (as described in mechanism 100 above) so that the seat folding mechanism is driven when the backrest folding mechanism is driven. The backrest folding mechanism is operatively connected to the seat folding mechanism so that the backrest folding mechanism drives the folding of the backrest 52 and the seat 36.

[0151] The seat 36 can be positioned in a raised position in front of the seat back 52, rather than in a lowered position behind the seat back 52. The seat length of the seat 36 can be shorter when the front position of the seat is lower than the rear position. The seat 36 can have a main seat portion 38 (as described above) and an auxiliary seat portion 40 (as described above), and its orientation relative to the main seat portion 38 can be operably changed when the seat 36 moves between the lowered rear position and the higher front position.

[0152] When seat 36 is in the rearward lowered position, the main seat portion 38 and the auxiliary seat portion 40 can be arranged side by side, so that both portions together accommodate a user in a seated position with seat 36 in a rearward lowered position. The auxiliary seat portion (40) can be indirectly changed in direction at least through the seat operation mechanism 100 to reduce the seat length of seat 36. When seat (36) moves to its forward raised seat position, only the main seat portion 38 is allowed to accommodate a user seated in the forward raised seat position.

[0153] The main seat portion 38 may have the same orientation in both the higher and lower positions, enabling it to support users in both positions. The auxiliary seat portion 40 may be installed in a lower position than the main seat portion 38 and is laterally positioned relative to the main seat portion 38 when the seat 36 is in the forward elevated position.

[0154] The seat control mechanism 100 may include at least one piston 108 (as described above), which is configured to store energy when the seat 36 is moved to a lower rear position and to release the stored energy when the seat 36 is moved to a higher forward position.

[0155] The roll-off prevention mechanism 200 may include a roll-off prevention member 206 (as described above) associated with each first wheel 28a and is operable between a rollable state and a roll-off braking state, wherein the rollable state makes the front wheels 28 rollable and the roll-off braking state prevents the front wheels from rolling. The roll-off prevention trigger member 218 (as described above) may be indirectly activated at least via the seat operating mechanism 100 when the seat 36 is pulled to the raised seat position in front of it and may be operable to put the roll-off prevention trigger member 206 into the roll-off braking state.

[0156] The rotation prevention mechanism 300 (as described above) can change the state of the first wheel 28a from a state in which it can rotate (when the seat 36 is in a lower rear seat position) to a state in which it cannot rotate (when the seat 36 is in a higher front seat position, the first wheel 28a cannot rotate).

[0157] The rotation prevention mechanism 300 may include a rotation brake member 306 (as described above) associated with the front wheel 28, and can operate between a rotation-enabled state that allows the front wheel to rotate and a rotation brake state that prevents the front wheel 28 from rotating. When the rotation prevention trigger member 104 causes the rotation prevention member 206 to enter the rotation brake state, the rotation prevention trigger member 104 (as described above) can be activated and operable to cause the rotation brake member 306 to enter the rotation brake state.

[0158] Each first wheel 28a may take the form of a caster 34 (as described above) and be attached to the first leg 22 via a caster axle 62 (as described above). The second rotation prevention mechanism 300b is operable to prevent the caster 34 from rotating more than 180 degrees around the caster axle 62 in a rolling state only.

[0159] The anti-roll mechanism 200 and the anti-rotation mechanism 300 may include activation elements extending into the front leg 28, which are connected to the seat control mechanism 100 via the activation elements.

[0160] The frame 20 may be rigid, and its legs 28, 32 may be non-foldable. The seat operating mechanism 100 may be connected to the first leg 28a of the frame 20. The frame 20 may include a lower portion and an upper portion extending upward therefrom. The lower portion may include a first leg 22, a second leg 24, and frame reinforcing rods connecting the plurality of second legs 24.

[0161] Frame 20 may include a right frame member and a left frame member, each member having a lower portion of the frame member, the lower portion having a first pillar 22, a second pillar 24, and an upper portion of the frame member. Backrest 52 may be connected to the upper portion of the frame member.

[0162] The device may include a pair of extendable user support arms 46 connected to the upper part of a frame member. The arms 46 are operably switchable between a lower arm position and an extended arm position. In the lower arm position, a portion of the arm is located on the upper part of the frame for use when the device is in a first mode. The extended arm position is used at least when the device is in its second mode.

[0163] It should be understood that the above description is merely exemplary, and various embodiments of the present invention can be designed under necessary conditions. The features described in the above embodiments and features not described in the present invention can be used alone or in any suitable combination. Furthermore, the present invention can be designed based on embodiments that are not necessarily described above.

Claims

1. A two-way user support device, characterized in that, The bidirectional user support device is operable between a first chair mode and a second wheel mode, wherein in the first chair mode, the device is configured to accommodate a seated user facing the first direction; and in the second wheel mode, the device can roll in a second direction opposite to the first direction via a standing user facing the second direction. The device includes: A frame having an upper portion and a lower portion, wherein when in a first chair mode, a pair of first legs constitute a plurality of front legs of the device, and when in a second roller mode, a pair of second legs constitute the plurality of front legs of the device, the first legs and the second legs having corresponding wheels at their distal ends, and the first legs and the second legs extending downward from the upper portion; A seat, the seat being attached to the frame and capable of being positioned in an unfolded position and a folded position, wherein in the unfolded position it can at least partially accommodate a seated user facing the first direction, and in the folded position at least a portion of the seat has an orientation different from that in the unfolded position; A backrest, operably separately connected to the frame from the seat, such that the backrest can be brought into an extended position and a folded position to provide back support for the user, wherein in the extended position at least most of the backrest is positioned above the frame and the seat, and in the folded position at least most of the backrest extends along the frame in a side view of the device; and A backrest folding mechanism operable to move the backrest between a backrest extended position and a backrest folded position, wherein the backrest extended position is when the device is in a first chair mode, and the backrest folded position is when the device is in a second roller mode; and A seat folding mechanism that attaches the seat to the frame and is indirectly activated at least indirectly through the backrest folding mechanism, and is operable to move the seat to the seat folding position when the backrest is in the backrest folding position, and to move the seat to the seat unfolding position when the backrest is in the backrest unfolded position.

2. The apparatus as described in claim 1, characterized in that, In the backrest extended position, the backrest forms a first angle with the plane defined by the seat in the seat extended position; in the backrest folded position, the backrest forms a second acute angle with the plane, the second acute angle being smaller than the first angle.

3. The apparatus as described in claim 2, characterized in that, In the folded position of the backrest, it extends at least most of the way along the frame in a side view of the device.

4. The apparatus as claimed in claim 1, characterized in that, When the seat is in the folded position, at least most of the seat extends along the frame in a side view of the device.

5. The apparatus as claimed in claim 1, characterized in that, Each mechanism is connected to at least one other mechanism of the device to be activated and / or thereby activated by connection to the frame and / or by several mechanical elements disposed within the frame.

6. The apparatus as claimed in claim 1, characterized in that, The device further includes: A seat control mechanism operable to move the seat between a higher front seat position and a lower rear seat position, wherein a user sits in the seat, the higher front seat position constituting the seat unfolded position in which the seat can be unfolded.

7. The apparatus as claimed in claim 6, characterized in that, The orientation of the seat in the folded position is different from its orientation in the higher front seat position and the lower rear seat position.

8. The apparatus as claimed in claim 6, characterized in that, The device can operate in the following three modes: A neutral mode in which the seat is located in the higher front seat position, the backrest is located in the seat unfolded position, and the front wheels are prevented from rolling and rotating; In the first chair mode, the seat is located in the lower rear seat position, the backrest is in the same backrest unfolded position as in the neutral mode, and the front wheels are allowed to roll and rotate, enabling the device to roll in the first direction, while the user sits on the seat facing the first direction; and In the second roller mode, the seat is in the seat folded position and the backrest is in the backrest folded position. The front wheel is prevented from rotating as the rear roller, while the rear wheel constitutes the front roller, enabling the device to roll in the second direction opposite to the first direction, with the standing user facing the second direction.

9. The apparatus as claimed in claim 1, characterized in that, When the seat is in the higher front seat position, the seat length in the front region of the seat is shorter than the seat length when it is in the lower rear seat position.

10. The apparatus as claimed in claim 7, characterized in that, The backrest folding mechanism operably and mechanically drives the seat folding mechanism to fold the seat from the higher front seat position to the seat folding position, thereby enabling the device to be used in the second roller mode.

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