A desk system including desktop, legs, and foot elements is presented. Each leg is rotatably attached at one end to the desktop and attached at another end to one foot element which is also rotatable. The system is disposed in a stowed configuration when legs and foot elements are substantially parallel to the desktop and legs are disposed between and substantially parallel to foot elements. The system is disposed in an upright configuration when legs are substantially perpendicular to the desktop and each leg is substantially perpendicular to one foot element. The system is configured from stowed to upright by separately rotating legs about a minor axis in opposite directions away from one another and by separately rotating foot elements about a major axis in opposite directions toward one another. The system is configured from upright to stowed by separately rotating foot elements about the major axis in opposite directions away from one another and by separately rotating legs about the minor axis in opposite directions toward one another.

An adjustable table leg which includes an inner lead screw linking an inner lead screw nut to move an outer lead screw nut along an outer lead screw, so that the inner lead screw nut drives a lead screw outer pipe to link a leg middle pipe and the outer lead screw nut to drive a lead screw inner pipe to move an leg outer pipe up and down synchronously. Therefore, the upward and downward transmission is more stable, the upward and downward adjustment is smoother, the phenomenon of jamming does not occur, the adjustment precision is higher, the stress of the inner lead screw nut and the outer lead screw nut is more uniform, the fatigue degree is reduced, and the service life is increased.

An adjustable table leg which includes an inner lead screw linking an inner lead screw nut to move an outer lead screw nut along an outer lead screw, so that the inner lead screw nut drives a lead screw outer pipe to link a leg middle pipe and the outer lead screw nut to drive a lead screw inner pipe to move an leg outer pipe up and down synchronously. Therefore, the upward and downward transmission is more stable, the upward and downward adjustment is smoother, the phenomenon of jamming does not occur, the adjustment precision is higher, the stress of the inner lead screw nut and the outer lead screw nut is more uniform, the fatigue degree is reduced, and the service life is increased.

A length-adjustable support having a telescopic column assembly that includes a rotatable spindle rod configured to telescope an interior tube into and out of an exterior tube, or vice versa, of the telescopic column assembly in order to adjust the length of the length-adjustable support. The column assembly is illustratively attached to a motor housing containing a motor that rotates the spindle rod. In illustrative embodiments, a portion of the spindle rod is attached to the motor housing via a bushing member comprising two complimentary bushing components that surround the spindle rod and support a spindle plate that mates with the spindle rod to rotate therewith. The motor assembly is configured to substantially float within the motor housing and is attached to a flange of the housing by a clip or grommet that retains an attachment arm of the motor assembly.

A length-adjustable support having a telescopic column assembly that includes a rotatable spindle rod configured to telescope an interior tube into and out of an exterior tube, or vice versa, of the telescopic column assembly in order to adjust the length of the length-adjustable support. The column assembly is illustratively attached to a motor housing containing a motor that rotates the spindle rod. In illustrative embodiments, a portion of the spindle rod is attached to the motor housing via a bushing member comprising two complimentary bushing components that surround the spindle rod and support a spindle plate that mates with the spindle rod to rotate therewith. The motor assembly is configured to substantially float within the motor housing and is attached to a flange of the housing by a clip or grommet that retains an attachment arm of the motor assembly.

A three-segment electric lifting desk includes a desktop and supporting legs. The supporting legs are connected to the bottom of the desktop. A main beam is provided at a bottom of the desktop, and two ends of the main beam are respectively connected to one supporting leg. The supporting leg is formed by connecting three tubes of different diameters, and the three tubes are a first tube, a second tube and a third tube, respectively. The three tubes are sequentially nested and connected to each other, and an interconnected cavity is formed inside the tubes. An electric pushing rod is provided in the cavity. The three-segment electric lifting desk has the characteristics of simple structure, stable lifting process, freely space retracting and expanding, stable driving of lifting and lowering, etc.

A three-segment electric lifting desk includes a desktop and supporting legs. The supporting legs are connected to the bottom of the desktop. A main beam is provided at a bottom of the desktop, and two ends of the main beam are respectively connected to one supporting leg. The supporting leg is formed by connecting three tubes of different diameters, and the three tubes are a first tube, a second tube and a third tube, respectively. The three tubes are sequentially nested and connected to each other, and an interconnected cavity is formed inside the tubes. An electric pushing rod is provided in the cavity. The three-segment electric lifting desk has the characteristics of simple structure, stable lifting process, freely space retracting and expanding, stable driving of lifting and lowering, etc.

In a furniture piece including a furniture support part and an adjustable furniture part which is movable relative to the furniture support part by an electric drive motor, the electric drive motor is operable by a power supply at the power supply net voltage without galvanic separation between the power supply and the electric drive motor. The furniture pieces also include sensors for sensing motions of the furniture parts which motions are analyzed and compared with reference patterns to determine an occupation state of the furniture pieces.

In a furniture piece including a furniture support part and an adjustable furniture part which is movable relative to the furniture support part by an electric drive motor, the electric drive motor is operable by a power supply at the power supply net voltage without galvanic separation between the power supply and the electric drive motor. The furniture pieces also include sensors for sensing motions of the furniture parts which motions are analyzed and compared with reference patterns to determine an occupation state of the furniture pieces.

Four types of telescoping modules are disclosed wherein the first type has a pair of opposed female ends, the second type has a pair of opposed female ends, and the third type has a female end and an opposed male end. The fourth type has two opposed male ends between which a positionable threaded rod and retaining components stably extend the length between the male ends of the telescoping module. Alternatively, the fourth type of telescoping module may have a female end and a male end. Each of the male ends of the second, third, and fourth types of telescoping modular components comprises a cylindrical body with one or more linear set(s) of two or more spaced-apart prongs on the circumferential surface of the cylindrical body. Each of the female ends has a cylindrical receptacle with one or more linear channels and/or prong-retaining slots for receiving therein the cylindrical body.