The present invention relates to a chair which includes a subframe, a seat element, a back element, a spring mechanism and an adjustment device, wherein the spring mechanism includes a leaf spring which is clamped on one side in the subframe and a support which is movable on a track between the leaf spring and the subframe and wherein the adjustment device includes an adjustment member and a transmission mechanism. In this connection, a movement of the adjustment member is translated into a movement of the support at a transmission ratio of between 1:0.5 and 1:4.

An office seat is disclosed. The office seat includes a seat body; an adjustment mechanism for adjusting a sitting posture of a user by adjusting a state of the seat body, and the adjustment mechanism being provided on the seat body; an image capture device for detecting the contour of the user's body; a controller, the controller being connected to the adjustment mechanism and the image capture device, respectively, and controlling the adjustment mechanism to adjust the seat body according to the detection result of the image capture device. In certain embodiments the office seat may be able to adjust the user's sitting posture, protect the user's physical health, be comfortable in use.

A method of mathematically defining seat surface contours from quantitative definitions of relevant back, buttock and under-thigh surfaces of a sample of individuals, the method including adjusting a mathematical summary of the surfaces of the sample of individuals by means of a mathematical function of a summary statistic of the surfaces of the sample of individuals.

A panel assembly includes a frame and a textile panel. The frame has a first member and a second member spaced apart from each other. The textile panel is attached to and extends between the first member and the second member. A tension controlling system is attached to the textile panel. The tension controlling system is reconfigurable between a first state for tensioning the textile panel to provide a first tensile force and a first maximum sag distance, and a second state for tensioning the textile panel to provide a second tensile force and a second maximum sag distance. The first tensile force is greater than the second tensile force, and the first maximum sag distance is less than the second maximum sag distance.

A support mechanism supports a user taking a nap or resting in an upright position. The first support member supports the human body from below by contacting the knee and lower leg; the second support member supports the human body from below by contacting one of buttocks and upper legs; the third support member that contacts one of upper limbs and head of the human body and supports the human body from at least one of the front and rear directions; the fourth support member supports the human body from below by contacting the sole so that the human body's foot is in an inclined posture with respect to the up and down directions; and a moving mechanism moves one or two of the first support member, the second support member, and the fourth support member relative to the other one in the up and down directions.

A chair, comprising, a backrest, a seat coupled with the backrest, a column coupled with the seat, a linkage statically attached to the backrest and rotatably attached below the seat, a leaf spring statically attached at one end and in direct contact with the linkage to provide a resistance to tilting of the backrest relative to the column. A first structure fixed to the column, where a portion of the first structure has an arc shape that includes one or more teeth, and a second structure in contact with the first structure, wherein a portion of the second structure includes one or more teeth. The chair is configured such that, when a weight is applied to the seat, the one or more teeth of the second structure, a pivot point at which the backrest is configured to tilt relative to the column, and the linkage are configured to move together.

An electrically adjustable seating device includes at least one sensor element, a processor, a memory unit and at least one electromechanical actuator. The at least one sensor element is designed to detect predetermined seating parameter data relating to a person sitting on the seating device and to transmit the data to the processor. The processor is designed to determine person parameter data, relating to the person, from the seating parameter data, to extract control data, which are associated with the person parameter data, from the memory unit and to control the at least one electromechanical actuator on the basis of the control data.

An active chair system incorporates a tilt sensor to detect and measure the tilt of the seat above a pivot point and displays data about that tilt to the user to enable posture corrections to address subtle posture issues that a user might not otherwise recognize.

A method of detecting and correcting a user's posture through use of a mobile posture-detection cushion for a chair or any other seating apparatus. The cushion contains individual support modules that actively monitor a user's current seated position and adjust the user to attain an optimum sitting posture in response to individual pressure sensors within the cushion, and provides user-specific feedback to each individual user over a period of time of use of the cushion.

A pressure-sensing chair according to one embodiment of the present invention comprises: a first electrode having a first conductive region formed in a first direction; a second electrode having a second conductive region formed in a second direction; a sensing sheet including an intermediate layer arranged between the first electrode and the second electrode; a first elastic body arranged on the sensing sheet and having a first elastic modulus; and a plurality of second elastic bodies arranged in the first elastic body and having a second elastic modulus, which is greater than the first elastic modulus.