Mechanism for adjusting a carrier wheel and method for positioning the same

Abstract

The technical solution describes a mechanism for deploying and retracting adjustable transport wheels from a floor-based device or furniture of different types, such as a chair, a medical chair, a baby chair, an examination chair (hereinafter collectively referred to as a chair), a bedside table, a bed without a chassis, a cabinet, etc. The solution presented in this patent application uses a very simple mechanism of adjustable transport wheels hidden in the bottom of the device or furniture, which makes it possible to very easily transport and move the furniture from one place to another.

Description

Technical Field

[0001] The technical solution describes a mechanism for unfolding and retracting adjustable transport wheels from various types of equipment or furniture placed on the ground, such as chairs, medical chairs, baby chairs, examination chairs (hereinafter collectively referred to as chairs), bedside tables, baseless beds, cabinets, etc. The solution proposed in this patent application uses a very simple mechanism with adjustable transport wheels hidden under the equipment or furniture, making it very easy to move the furniture from one place to another. Background Technology

[0002] Existing types of medical chairs, such as gynecological chairs, dental chairs, infant chairs, and examination chairs (hereinafter collectively referred to as chairs), are mostly stationary and heavy. Therefore, they are difficult to move and usually require several people or any transport equipment such as a trolley to move such chairs to another location.

[0003] Some medical or infant chairs, tables, or beds may be equipped with two or four wheels for transport or movement. Because the wheels are visible, existing technology recognizes that small-diameter, visible wheels cause as little obstruction as possible. Furthermore, such wheels need to be equipped with brakes to prevent any unintended movement of the chair or bed during patient examination, or to prevent them from passing under the patient and causing a fall and other injury. Visible wheels are prone to accumulating dust because they are not frequently used, thus becoming a source of dirt, which presents another problem for caregivers.

[0004] As mentioned earlier, a disadvantage of these wheels is the necessity of brakes. If a chair or any other piece of equipment has four wheels or casters, at least two wheels need to be braked, and ideally all four wheels should be equipped with brakes. If a caregiver forgets to brake the wheels, for example, due to uneven ground, the chair may unexpectedly begin to move on its own. Furthermore, if a caregiver forgets to brake the chair's wheels and someone leans against the chair, the chair may move on its own, leading to a dangerous situation and potentially causing injury. These braked wheels often have small, hard-to-reach brakes, formed as easily damaged small plastic fasteners, and then, depending on the location of the brake control mechanism failure, the wheel may not be able to brake or may not brake at all.

[0005] Existing solutions are described, for example, in document US5845471(A), which illustrates an adjustable rangefinder wheel assembly for a rotary lawnmower platform. The wheel and its axle are carried on an arm, which is pivotally supported by a bracket mounted on the platform. The pivot support is adapted to allow the arm to move toward and away from the bracket. The axle includes a portion projecting through the arm for insertion into one of a plurality of vertically spaced openings in the bracket during arm movement. Thus, the bracket provides vertical adjustment of the rangefinder wheel and direct support for loads encountered by the rangefinder wheel. An eccentric locking mechanism is provided to lock the arm in its adjusted position. A disadvantage of this assembly is that each time the user wants to change the wheel's position, he / she needs to release the wheel from a given opening, move it to another opening, and re-secure it in that position via the locking mechanism. To make this change, the user needs to have the necessary tools available and carry them with him / her.

[0006] Document US 3972544 describes an amphibious structure with a retractable suspension system, in which the lever mechanism pulls the wheels from one position to another as the transport wheels move from the chassis toward the floor. The disadvantages of this solution are that it is very difficult to operate, technically complex, requires sufficient surrounding space, and ultimately has high financial requirements.

[0007] Document US 4840020 describes the rear wheels of a lawnmower or harvester whose height is adjusted using an adjusting element having numerous openings in the bottom portion of a tube connected to the lawnmower frame. To change the wheel position, the user needs to use the relevant tool again, whereas the innovative solution described in this document eliminates this tool. Although the wheel height position can be adjusted in this prior art document, the solution is, in principle, highly impractical. Each time a change is made, the position needs to be manually adjusted within the given openings and secured with screws.

[0008] The technical solution proposed in this paper aims to deploy or release wheels from under the base frame, allowing the chair to be moved from one location to another. The mechanism is designed for easy transport without the need for any additional tools, and is inexpensive and structurally simple. The target mechanism operates according to the changing position of the equipment beneath it. Summary of the Invention

[0009] The proposed concealed transport or maneuvering wheels address the aforementioned major drawbacks. Concealed transport wheels are ideally suited for use with any static standing equipment or furniture, such as baby supports and medical patient supports, any type of medical and examination chair, etc. They can also be used with other types of furniture outside the medical field, such as chairs, beds, bedside tables, tables, boxes, cabinets, sofas, etc. Concealed transport wheels are used to easily transport any equipment from one place to another or to partially move it aside.

[0010] The mechanism for the adjustable transport wheel includes a base frame; a support member, which in a preferred embodiment may be part of the base frame; and two arms, at least one of which is a support arm to which the transport wheel is attached, and the other arm is a transport arm that includes a shaped slotted link.

[0011] Adjustable transport wheels are attached to a base frame via support arms. The support arms are fixed to the base frame at one end by a pin, and the transport wheels are fixed to the other end by a pivot or screw. The support arms are also pinned to a second arm, which is a control arm. The control arm includes a slotted link with a groove in which a sliding member is located, through which a pin from the support arm passes. The pin of the support arm is pivotally fixed in the slotted link of the sliding member of the control arm, and the control arm is attached to the base frame at least at one end. Preferably, both arms are attached to a support member, which can be, for example, any profile fixed to the top side of the base frame, such that the wheels become part of the base in the retracted position, i.e., the non-transporting position.

[0012] The fundamental component of the innovative solution proposed in this paper is the positioning mechanism of the transport wheels. The support arm of the adjustable transport wheel moves via a pin located in a sliding member, which is part of a slotted link in the control arm. The base frame of the chair or any equipment is kinematically tilted according to the position of the sliding member. In the first retracted position, i.e., the non-transporting position, the pin in the slotted link is at its highest position. If the transport wheels need to be used and thus activated, the base of the chair or similar equipment needs to be raised to one side to become tilted, and the pin of the support arm, including the sliding member in the slotted link, can move due to gravity to a pre-activated position, reaching approximately the middle of the slotted link, where the pin falls into the activation point of the slotted link. The pin, together with the sliding member, engages in this activation point of the slotted link, locking or securing the wheel in the active position, i.e., the transporting position, according to the weight of the chair or other equipment. The active position, i.e., the transporting position, allows the chair or other equipment to be lifted above the ground and facilitates moving or transporting the chair from one place to another, or moving the chair to the desired location. If the wheels need to be deactivated again and reach the retracted position (non-carrying position), the chair needs to be easily raised again so that the pin in the support arm, which includes a sliding member in the slotted linkage, can move to its lowest position due to gravity, the so-called pre-deactivation position, where the pin is released. When the chair or other equipment is moved back to a horizontal plane, the pin moves to its highest position in the slotted linkage of the control arm due to the chair's own weight; this highest position is the retracted position (non-carrying position), where the pin remains. The adjustable transport wheels change their position to the retracted position (non-carrying position) until the chair is reactivated by changing its position or tilting it.

[0013] In a preferred embodiment, two concealed adjustable casters are located beneath the chair or any other equipment, abutting each other in the middle of the base frame. Optionally, at least one adjustable caster is located beneath the chair or any other equipment, allowing the chair or equipment to be moved to any desired location. In another preferred embodiment, any number of such adjustable casters can be attached to the base frame, depending on the size of the chair or equipment used, and the dimensions of the adjustable caster mechanism will then be proportionally corresponding to the given chair or equipment. The adjustable casters are preferably made of metal components, but may also be made of metal alloys, plastic materials, or a combination of plastic and metal materials with sufficient rigidity and load-bearing capacity. Attached Figure Description

[0014] Figure 1 A side view of the baby chair is shown, in which a cross-section of the base portion shows the adjustable carrying wheels visible to be fixed to the chair's base frame.

[0015] Figure 2 An axonometric projection of the mechanism supporting and securing the adjustable transport wheels, viewed from the outside of the frame, is shown.

[0016] Figure 3 An axonometric projection of the mechanism supporting and securing the adjustable transport wheels, viewed from the inside of the frame, is shown.

[0017] Figure 4 A side view of the mechanism of the adjustable transport wheels in the retracted position, i.e., the non-transporting position, is shown.

[0018] Figure 5 A side view of the mechanism of the adjustable transport wheel in the pre-activated position is shown.

[0019] Figure 6 A side view of the mechanism with adjustable transport wheels in the active position, i.e., the transport position, is shown.

[0020] Figure 7 A side view of the mechanism with adjustable transport wheels in a ready-to-use position for storing chairs or any other equipment is shown.

[0021] Figure 8 A side view of the mechanism with the adjustable transport wheels in the retracted position, i.e., the non-transporting position, is shown.

[0022] Figure 9 Side views of the adjustable handling wheel mechanism at various positions are shown. Detailed Implementation

[0023] Figure 1A side view of device 1, in this case a chair, is shown. It includes a support platform 2 divided into a seat portion and a backrest portion, the backrest portion having a positioning mechanism 3 for the chair's backrest; a lifting mechanism 4, in a preferred embodiment a telescopic column; and a chair base 5, which, together with the motor of the telescopic column of the lifting mechanism 4, is covered by a cover 6. A cross-sectional projection of the cover 6 of the base 5 shows adjustable transport wheels 7 fixed to an elevated support member 8 on the upper side of the base 5. The support member 8 is in the form of a profile or tube. In a preferred embodiment, the support member 8 is part of the base frame 5, or alternatively, the support member 8 may be attached to the base frame 5 by means of pins, rivets, screws, welded joints, or any other convenient method. The mechanism of the adjustable transport wheels 7 is fixed to the elevated support member 8. In a preferred embodiment, the mechanism of the adjustable transport wheels 7 includes two arms, with a first arm, i.e., a support arm 9, attached to the support member 8 at least at one end and the adjustable transport wheel 7 attached to the other end of the support arm 9. The first support arm 9 is attached to the support member 8 of the base frame 5 and the adjustable transport wheel 7 by means of pins 10. In a preferred embodiment, the support arm 9 includes three types of such pins 10, wherein a first pin 10a connects the support arm 9 to the support member 8, a second pin 10b connects the support arm 9 to the adjustable transport wheel 7, and a third pin 10c connects the support arm 9 to the control arm 11. The first support arm 9 is connected to the second arm, i.e., the control arm 11, by pin 10c, which reaches the second control arm 11 via a slotted link 12 and a sliding member 13 of the second control arm 11. The second control arm 11 is attached to the support member 8 of the base frame 5 at at least one end by means of a fourth pin 10a, and at the other end, the control arm 11 includes a slotted link 12 in which the sliding member 13 moves freely. The pin 10c of the first support arm 9 of the adjustable transport wheel 7 passes through the sliding member 13. Figure 1 The adjustable transport wheel 7 is shown in the retracted position, i.e., the non-operating position 1A, where the base frame 5 of the chair 1 is in a stationary position and does not need to be moved or transferred.

[0024] Figure 2 An axonometric projection of a portion of a base 5 having a mechanism for securing the adjustable transport wheels 7 in a pre-disuse position 1D is shown. Figure 2 The base frame 5 of the chair 1 is clearly shown to include a support member 8 on the upper side, which is in the form of a profile or tube. In a preferred embodiment, the support member 8 is part of the base frame 5, or alternatively, the support member 8 may be attached to the base frame 5 by means of pins, rivets, screws, welded joints, or any other convenient method. The support member 8 is attached to the support arm 9 at at least one end by means of a first pin 10a, and at the other end, the support member 8 is secured to the control arm 11 by means of a fourth pin 10a. Figure 2The diagram shows that the support arm 9 includes three pins, with at least two pins 10a and 10b located at opposite ends of the middle portion of the support arm 9. At least one of these pins 10a and 10b is connected at one end to the support member 8, and at the other end to an adjustable transport wheel 7 via a second pin 10b. Furthermore, Figure 2 The support arm 9 is shown to include a third pin 10c, located on the upper side of the support arm 9, above the second pin 10b of the adjustable transport wheel 7. The third pin 10c connects the support arm 9 of the adjustable transport wheel 7 to the second control arm 11. This third pin 10c of the support arm 9 is floatingly connected to a sliding member 13 in the slotted link 12 of the control arm 11. The control arm 11 is in the form of a metal profile, including the slotted link 12 and the sliding member 13, one end of which is freely movable with the third pin 10c of the support arm 9, and the sliding member 13 is locked in the profile by a stop 14 at least at one end of the sliding member 13. At the other end, the control arm 11 is connected to the support member 8 by a fourth pin 10a, located at the opposite end of the control arm 11. The two arms, namely the support arm 9 and the control arm 11, form an inverted isosceles triangle in this pre-disuse position 1D, with the adjustable transport wheel 7 at the vertex of the triangle.

[0025] Figure 3The adjustable transport wheel 7 is shown attached to at least one arm, namely a support arm 9 or a control arm 11. In a preferred embodiment, the adjustable transport wheel 7 is attached to the support arm 9 by means of a third pin 10c. In a preferred embodiment, the support arm 9 includes at least three types of pins, with at least two pins 10a and 10b, namely a first pin 10a and a second pin 10b, located at opposite ends of the middle of the support arm 9. The first pin 10a connects the support arm 9 to the support member 8 of the base frame 5 at one end, although optionally it may only connect to the base frame 5. The support arm 9 includes a third pin 10c, which is fixed to the upper side of a profile above the second pin 10b of the adjustable transport wheel 7. The third pin 10c connects the support arm 9 to the second control arm 11 in a freely movable sliding member 13, which is located in a slotted connecting rod 12 of the control arm 11. Optionally, the third pin 10c may also be located on the underside of the profile of the support arm 9 below the second pin 10b of the adjustable transport wheel 7. Optionally, the third pin 10c of the adjustable transport wheel 7 may be parallel to the pin 10b to secure the adjustable transport wheel 7 to the control arm 11. The sliding member 13 is secured in the profile of the control arm 11 by a stop 14 located on the underside of the profile of the control arm 11. In a preferred embodiment, the stop 14 is a rivet; however, it may also be a profile plug, screw, or any other form of stop suitable and sufficiently rigid to retain the sliding member 13 in the slotted link 12 of the control arm 11. The control arm 11 is a positionable arm, and in a preferred embodiment, it is also a support arm. The control arm 11 can change the position of the adjustable transport wheel from the retracted position, i.e., the non-transport position 1A, to the ready-to-activate position 1B, then to the activated position, i.e., the transport position 1C, then to the ready-to-deactivate position 1D, and finally return to the retracted position, i.e., the non-transport position 1A, by means of the kinematically moving sliding member 13 in the slotted link 12 of the control arm 11.

[0026] Figure 4 A side view of the mechanism of the adjustable transport wheel 7 is shown, where the adjustable transport wheel 7 is shown in the retracted position, i.e., the non-transporting position 1A, in other words, in a hidden position where the wheel is not visible. In this position, the adjustable transport wheel 7 cannot be used to move the chair 1 or any other equipment from one place to another. The mechanism of the adjustable transport wheel 7 includes two arms, arm 9 and arm 11, wherein the support arm 9 carries the adjustable transport wheel 7 and is connected to the second control arm 11, the control arm including a slotted link 12 with a sliding member 13, the sliding member being connected to a third pin 10c of the support arm 9, such that the adjustable transport wheel 7 can be positioned from the retracted position, i.e., the non-transporting position 1A, to the active position, i.e., the transporting position 1C. Figure 4Not shown in the figure. Between these retracted positions, i.e., non-transfer position 1A and active position, i.e., transfer position 1C, there is another position called pre-activation position 1B, to actuate the adjustable transfer wheel 7 to the active position, i.e., transfer position 1C. The transition to said positions 1B and 1C is shown in the figure below. After the active position, i.e., transfer position 1C, is the pre-deactivation position 1D, to deactivate the adjustable transfer wheel 7. All positions 1B, 1C, and 1D are shown and described in the following figures. The specific position of the adjustable transfer wheel 7 is defined by the third pin 10c of the support arm 9 according to the position of the pin 10c in the slotted link 12 of the control arm 11. The schematic arrows indicate the direction in which the third pin 10c will move in the sliding member 13 to use the adjustable transfer wheel 7.

[0027] along with Figure 4 after, Figure 5 Another position of arms 9 and 11 is shown, wherein support arm 9 is fixed to support member 8 at at least one end and attached to adjustable transport wheel 7 at the other end. Above this attachment point of adjustable transport wheel 7, support arm 9 includes a third pin 10c for attachment to another control arm 11, which is also attached to support member 8 at one end (not shown herein), and at the other end, control arm 11 is attached to sliding member 13 by means of the third pin 10c of support member 9. Sliding member 13 moves in a slotted link 12 of control arm 11. The pin 10c is firmly fixed at the opposite end of support arm 9, to which adjustable transport wheel 7 is attached. This position is referred to as the intermediate position or pre-activated position 1B, to which adjustable transport wheel 7 turns if the position of chair 1 or any other equipment is changed by tilting to one side (tilting). At this time, the chair 1 is in a tilted or inclined horizontal position, the sliding member 13 in the slotted link 12 changes position, and the pin 10c, together with the sliding member 13 in the slotted link 12 of the control arm 11, moves to the properly prepared activated position 1B due to gravity. In this position, the adjustable transport wheel 7 is not yet ready to move.

[0028] Figure 6The active position, i.e., the transport position 1C, is shown, in which the position of pin 10c is visibly changed from the intermediate position of pre-activated 1B (not shown) to the active position, i.e., the transport position 1C, where pin 10c is locked approximately in the middle of the slotted link 12 by means of sliding member 13 and slotted link 12. In such a position, chair 1 or any other equipment can be easily moved. To secure and lock the active position, i.e., the transport position 1C, pin 10c is locked in a slot of slotted link 12 by means of sliding member 13, which provides locking of chair 1 or any other equipment above the ground, and pin enables chair 1 to be moved to another location. When pin 10c is locked in the slot of slotted link 12 by sliding member, the weight of the entire chair 1 or any other equipment is transferred to adjustable transport wheels 7, and the base or frame of chair 1 is raised above the ground frame, and chair 1 can be moved easily. Similar to the pre-activated intermediate position 1B, when the chair 1 tilts, due to gravity, the retracted position, i.e. the non-transfer position 1A, changes to the active position, i.e. the transfer position 1C, via the pre-activated intermediate position 1B. When the chair 1 reaches the desired position 1C, the weight of the chair 1 keeps the chair 1 horizontal above the ground.

[0029] Figure 7 The mechanism of arms 9 and 11 of the adjustable transport wheel 7 is shown again in another position of the adjustable transport wheel 7, namely the pre-disengagement position 1D. When the chair 1 or any other equipment is moved to another desired position and raised or tilted again on one side after the adjustable transport wheel 7 has been used in the active position, i.e., transport position 1C, the position changes such that the position of pin 10c is kinematically altered along the axis of the slotted link 12 of the control arm 11 by means of the sliding member 13. Pin 10c reaches its lowest position via the sliding member 13, which is the pre-disengagement position 1D shown herein. This pre-disengagement position 1D is used to return the adjustable transport wheel 7 to its original position, see below. Figure 8 When pin 10c moves to the lowest position in the slotted link 12 of the control arm 11 by means of sliding member 13, the unfolding and movement of the adjustable transport wheel 7 is caused by gravity, which affects the third pin 10c in the sliding member 13 of the slotted link 12.

[0030] Therefore, as mentioned above, Figure 8 The mechanism of arms 9 and 11 is shown, in which the adjustable transport wheel 7 is again in the retracted position, i.e., the non-transport position 1A. Figure 8The positional changes of the support arm 9 and control arm 11, as well as the positional change of the third pin 10c, are shown. In a preferred embodiment, the control arm 11 can also be a support arm. The third pin 10c is again in the retracted position, i.e., the non-carrying position 1A, as previously described. The third pin 10c of the support arm 9 moves from the previous pre-deactivation position 1D in the slotted link 12 of the control arm 11 to the highest position in the slotted link 12, which is achieved by the free-moving sliding member 13. Along with the positional change of the third pin 10c, the position of the support arm 9 to which the adjustable carrying wheel 7 is fixed also changes, and therefore the position of the adjustable carrying wheel 7 also changes. When the weight helps to move the third pin 10c together with the sliding member 13 to the highest position in the slotted link 12 of the control arm 11, the change from the pre-deactivation position 1D to another deactivation position is caused by the weight of the chair 1 or any other equipment, and the adjustable carrying wheel 7 returns to the retracted position, i.e., the non-carrying position 1A, via the control arm 11.

[0031] at last Figure 9 A portion of chair 1 is shown, specifically a portion of the base frame 5 with arms 9 and 11 and adjustable transport wheels 7. The control arm 11, including a slotted link 12 and a sliding member 13, is freely connected to the support arm 9 by means of a pin 10c, which moves together with the sliding member in the slotted link 12 to various positions of the adjustable transport wheels 7.

[0032] Figure 1 A shows the adjustable transport wheel 7 in the retracted position, i.e., the non-transporting position, including the base 5 of the adjustable transport wheel 7 of the chair 1 being at the same level as the ground. When the retracted position, i.e., the non-transporting position 1A, is changed to the pre-activation position 1B, the sliding member 13 will move together with the third pin 10c in the slotted link 12 due to the gravity affecting the free support sliding member 13 and the third pin 10c in the slotted link 12, which enables the position to be changed from one position to another, the pre-activation position 1B.

[0033] Figure 1 B shows the adjustable transport wheels 7 in a pre-activation position, including the base 5 of the adjustable transport wheels 7 in an inclined position after the chair 1 or any other equipment is raised above the ground. By raising the chair 1 above the ground, the third pin 10c of the support arm 9 is released in the slotted link 12 of the control arm 11, and the pin 10c moves to the pre-activation position 1B due to the free-moving sliding member 13 and the influence of the weight of the chair 1 in the inclined position above the ground.

[0034] Figure 9The active position of the adjustable transport wheels 7, namely transport position 1C, is also shown. In this position, the adjustable transport wheels 7 are in contact with the ground and the base frame 5 of the chair 1 or any other equipment is raised above the ground. The adjustable transport wheels 7 can be used to move or transport the chair 1 or any other equipment to a desired location. Also in this case, the movement of the pin 10c together with the sliding member 13 in the slotted link 12 of the control arm 11 is caused by gravity, which affects the adjustable transport wheels 7 as the pin 10c moves with the sliding member 13 to the middle portion of the slotted link 12 and moves parallel to it. The weight of the chair 1 or any other equipment in this active position 1C affects the pin 10c and the adjustable transport wheels 7.

[0035] Another position 1D shown for the adjustable transport wheels 7 of chair 1 or any other equipment is the pre-deployment position 1D, where the base frame 5 is tilted as the third pin 10c moves into the lowest part of the slotted link 12 or control arm 11 via the sliding member 13 in the slotted link 12. In this position, the base frame 5 of chair 1 returns to position 1A, which means entering the retracted position, i.e., the non-transportation position 1A, where chair 1 stands statically on the ground to which chair 1 has moved. The movement of pin 10c and the sliding member 13 in the slotted link 12 to the pre-deployment position 1D is again affected by gravity, and the change in movement back to the retracted position, i.e., the non-transportation position 1A, is caused by the weight of chair 1 or any other equipment, which is transferred to the mechanism of the control arm 11, in which the third pin 10c of the support arm 9 moves together with the sliding member 13 into the highest part of the slotted link 12, which means moving to the initial retracted non-transportation position 1A.

[0036] List of reference numerals

[0037] 1) Chair (equipment)

[0038] 2) Support platform

[0039] 3) Positioning mechanism for the backrest

[0040] 4) Chair lifting mechanism

[0041] 5) Base frame (base frame)

[0042] 6) Base frame cover

[0043] 7) Carrying wheels

[0044] 8) Supporting components

[0045] 9) Support arm

[0046] 10a), 10b), 10c) First and fourth pins, second pin, third pin

[0047] 11) Control arm

[0048] 12) Slotted connecting rod

[0049] 13) Sliding members

[0050] 14) Stop components

[0051] 1A – Deployment position, i.e., non-transportation position

[0052] 1B - Preparatory Activation Position

[0053] 1A – Activation location, i.e., the transport location.

[0054] 1D - Preparatory Deactivation Position

Claims

1. An adjustable wheel mechanism for handling and moving furniture, comprising a support member (8) attachable to a base frame (5) and at least two arms (9, 11), characterized in that, At least one arm is a support arm (9) of the adjustable transport wheel (7), and at least one arm is a control arm (11) including a slotted link (12) at at least one end, in which a sliding member (13) moves freely. The two arms (9) and (11) are interconnected. The support arm (9) is attached to the support member (8) at at least one end using a first pin and to the adjustable transport wheel (7) at its other end using a second pin. Above the joint, the support arm (9) is connected to the control arm (11) using a third pin. The control arm (11) is connected to the support member (8) at opposite ends of the control arm (11) by a fourth pin, wherein the support arm (9) carries the adjustable transport wheel (7), which is moved from at least one position to another by a third pin in the sliding member (13) of the slotted link (12) of the control arm (11), wherein the specific position of the adjustable transport wheel (7) is defined by the third pin of the support arm (9) according to the position of the third pin in the slotted link (12) of the control arm (11).

2. The adjustable transport wheel mechanism for transporting and moving furniture as described in claim 1, characterized in that, The support arm (9) is attached to the base frame (5) at at least one end using a first pin and to the adjustable transport wheel (7) at the other end using a second pin. Above the second pin, the support arm (9) is connected to the control arm (11) using a third pin via the sliding member (13) of the slotted link (12). The control arm (11) is connected to the base frame (5) at the opposite end of the control arm (11) using a fourth pin.

3. The adjustable handling wheel mechanism for transporting and moving furniture as described in claim 1, characterized in that, The support arm (9) and the control arm (11) are connected to the base frame (5) on the support member (8) using a first pin and a fourth pin, wherein each of the arms (9, 11) is located at opposite ends of the support member (8).

4. The adjustable handling wheel mechanism for transporting and moving furniture as described in claim 1, characterized in that, The support arm (9) is connected to the adjustable transport wheel (7) by a second pin, and the support arm (9) is connected to the base frame (5) and attached to the support member (8) at the opposite end by a first pin. The support arm (9) also includes a third pin located above the second pin of the fixed adjustable transport wheel (7), such that the third pin is movably attached to the control arm (11) in the slotted link (12).

5. The adjustable handling wheel mechanism for transporting and moving furniture as described in claim 1, characterized in that, The control arm (11) includes a slotted link (12) having a freely movable sliding member (13) at at least one end, and at the other end it includes a fourth pin for attaching the control arm (11) to the support member (8).

6. The adjustable transport wheel mechanism for transporting and moving furniture as described in claim 1, characterized in that, The support arm (9) includes three pins, wherein the first pin fixes the support arm (9) to the support member (8), the second pin fixes the adjustable transport wheel (7), and the third pin fixes the support arm (9) to the control arm (11).

7. A method for positioning an adjustable handling wheel mechanism for carrying and moving furniture, characterized in that, The support arm (9) uses the control arm (11) to move the adjustable transport wheel (7), wherein, when lifting the device (1), the third pin of the support arm (9) connected to the sliding member (13) in the slotted link (12) of the control arm (11) moves from the highest retracted position, i.e., the non-transporting position (1A), to the pre-activation position (1B), and then to the activation position, i.e., the transporting position (1C), wherein the third pin of the support arm (9) is located in the middle in the slotted link (12) of the control arm (11), and when the device (1) is subsequently lifted, the position changes to the pre-deactivation position (1D), in which the third pin is released in the slotted link (12) so that the third pin can be positioned to return to the retracted position, i.e., the non-transporting position (1A).

8. The method for positioning an adjustable handling wheel mechanism for transporting and moving furniture as described in claim 7, characterized in that, The position of the adjustable transport wheel (7) changes according to the position of the support arm (9) in the control arm (11).

9. The method for positioning an adjustable handling wheel mechanism for transporting and moving furniture as described in claim 7, characterized in that, The third pin in the slotted link (12) includes at least three positions, wherein the first position is a retracted position, i.e., a non-transporting position (1A), in which the third pin of the support arm (9) is located in the highest part of the slotted link (12) of the control arm (11), and wherein the second position is an activated position, i.e., a transporting position (1C), in which the third pin of the support arm (9) is located in the middle part of the slotted link (12) of the control arm (11), wherein the third pin moves from the transporting position to a pre-deactivation position (1D), in which, before the third pin moves back to the retracted position, i.e., the non-transporting position (1A), the third pin of the support arm (9) is located in the lowest part of the slotted link (12) of the control arm (11).

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