A mechanism for raising and lowering an armrest for a seat includes an armrest, a rotatable hub, and an actuating linkage between the armrest and the hub, the rotatable hub having a cam that operates the actuating linkage to raise the armrest wherein the cam can rotate through a first angle of rotation where the actuating linkage is not operated a second angle of rotation where the actuating linkage is operated. The cam can rotate through a third angle of rotation where the actuating linkage is not operated, this angle being different to the first angle of rotation. The cam is torsionally linked to the rotation of a seat member.

An arm assembly includes an arm support configured to support an arm of a seated user, an arm stalk extending downwardly from and supporting the arm support, an arm base telescopingly receiving the arm stalk between a first position and a second position and a bearing arrangement positioned between the arm stalk and the arm base. The bearing arrangement includes a bearing member configured to abut the arm base, and a biasing member configured to bias the bearing member from the arm stalk and into abutment with the arm base.

An office chair has an armrest. In order to provide an armrest which is of particularly simple construction, the armrest contains an armrest column and an arm support which is mounted on the armrest column and is rotatable about a rotation axis and which is linearly displaceable relative to the armrest column. A rotary mechanism for the rotation of the arm support is arranged substantially fully within the armrest column.

An armchair includes a base, a backrest pivotally connected to the base by a first rotating shaft, an armrest connected to the base and an elastic assembly fixed on the armrest. The backrest and the elastic assembly are pivotally connected by a second rotating shaft. The elastic assembly is configured to provide elastic force when the backrest swings around the first rotating shaft. The elastic assembly arranged between the backrest and the armrest permits the backrest to be able to swing relative to the base. In use, the elastic assembly controls the swing amplitude of the backrest according to the pressure exerted by the user's back on the backrest. When the user reclines backward, the elastic assembly acts as a cushion to support the backrest to slowly swing backward due to the elastic force. When the user rises, the elastic force of the elastic assembly urges the backrest to reset.

An adjustment mechanism is adapted to be installed in an armrest that includes a support member and an arm member disposed over and mounted rotatably to the support member. The adjustment mechanism includes a fixed unit adapted to be fixedly mounted in the support member, and a rotating unit adapted to be co-rotatable with the arm member. The fixed unit includes an elastic plate formed with a plurality of notches, and a joint block having a plurality of concavities. The rotating unit includes a linking plate having two rotating columns, and an engaging component. The rotating columns removably engage two corresponding ones of the notches, and the engaging component removably engages one of the concavities of the joint block.

A nursing chair includes a seat and one or more adjustable armrests for supporting an infant. The adjustable armrests are repositionably movable in various directions to suitably position the infant and facilitate comfort of a mother and the infant during breastfeeding. The nursing chair may also include a privacy screen for selectively obscuring the mother and/or infant.

An armrest may comprise a first casing and a second casing coupled to the first casing. An angular armrest adjustment assembly may be located between the first casing and the second casing. The angular armrest adjustment assembly may comprise a hub coupled the first casing, a lever ring configured to engage a splined surface of the hub, and a biasing member configured to bias the second casing away from the lever ring.

A method of controlling an adjustable chair comprising the steps of measuring the height of a person, entering the height of the person into a software application on a mobile device, taking a photograph of the person with a mobile device, analyzing the photograph to determine physical measurements of the person, storing the measurements in the mobile device; calculating optimum ergonomic adjustment of the chair based upon the stored measurements; and, transmitting signals to a controller in the chair to control actuators and adjust various components in the chair to achieve optimum ergonomic adjustment. The technology also includes the ergonomic task chair adjusted by the aforementioned method.

An apparatus that supports a user in a variety of positions to comfortably perform tasks, such as applying one or more tattoos to skin of a subject is herein disclosed. The apparatus can be reconfigured to optimally position and support the arms and/or chest of the user. The apparatus includes a vertically movable armrest assembly. Armrests can support the user's forearms while supporting the users chest such that the user can comfortably perform tasks in front of a chest support of the stool. The armrest assembly can be translated vertically to accommodate the user's body to achieve desired positioning.

The present invention relates to a chair for supporting a person feeding a baby. The chair includes a seat. The chair includes an armrest operatively connected to the seat. The armrest is selectively rotatable about a vertical axis, and moveable forward/rearward, laterally inward/outward and vertically relative to the seat. The armrest is shaped to receive a baby thereon.