Novel sit-stand seating devices, more particularly, to sit-stand seats or stools that can tilt forward to provide balanced support for seated to near-standing postures and methods of their use are disclosed. The sit-stand devices are useful, inter alia, to provide stabilized worker positioning to carry out a task for a range of sitting through standing postures in an environment associated with a task for a worker in need thereof.

An ergonomic chair comprising a seat, a lower leg support, a chest support and a hip support. The seat is configured to support the posterior thigh and/or buttocks of a seated user, the seat being configured to urge the hip of the seated user in a forward direction. The lower leg support is configured to support the anterior side of the lower legs of the seated user. The chest support is configured to support the chest of the seated user in a forward leaning position of the seated user. The hip support is configured to support the anterior hip of a seated user as the seat urges the seated user’s hip forwardly towards the hip support.

A pelvic tilt detecting chair is provided to a user to sit and configured to detect a pelvic angle of the pelvis of the user in sitting position. The pelvic tilt detecting chair comprises a base, a supporting component, a carrying component and a detector. The base has a horizontal surface. The supporting component comprises a first end connected to the base and a second end. The carrying component is moveably configured and comprises an installing surface coupled to the second end and a chair surface configured to contact the pelvis of the user. The chair surface and the horizontal surface form a tilt angle when the user sits on the carrying component. The detector stores a tilt angle threshold value and is configured to the carrying component to detect the tilt angle. The detector generates a warning signal when the tilt angle is not matched up with the tilt angle threshold value.

A height adjusting mechanism for a dentistry stool comprises a support member, a movable height adjusting assembly and a pushbutton actuator. The support member is coupleable to the stool adjacent a seat of the stool. The movable height adjusting assembly is selectively movable up and down relative to the support member. The pushbutton actuator is positionable on a side of the movable height adjusting assembly adjacent a seated user, and is manually actuatable by the seated user to release the movable height adjusting assembly from a locked position at a current height to allow the movable height adjusting assembly to be moved to a new height. The height adjusting mechanism can be implemented to provide a height-adjustable seat back and/or a height-adjustable torso bar.

A collapsible desk system is provided. The desk system may include first and second elongate members having a common central pivot and being pivotal relative to one another in a scissor-like manner. A seat may be attached to one of the elongate members. A support member may be cooperable with the elongate members to selectively retain the elongate members in one or more orientations. A desk top may be pivotally attached to a column. The members, seat, column, and desk top may be arranged with one another to transition between at least a collapsed and an expanded position. A knee support may be mounted to one of the elongate members. The desk top may define a side face having a groove extending about at least a portion of a perimeter of the desk top and the groove may be sized to receive a first fastener tab of an accessory.

A surgeon support system comprising a base having a foot platform with an appropriate angle adapted to support a user's feet. The base surface may be lifted using a jack pedal and the height is adjusted by a base handle. A knee pad is supported by a knee support bar which is attached to the base. The knee pad is pivotally connected to a seat pad and a chest pad support bar. The seat pad is supported by a seat pad height-adjusting strut and the height is adjustable by a seat pad height-adjusting handle. The chest pad support bar supports a chest pad for forward and backward movement of the user. The angle position of the chest pad is adjusted and released by an angle-adjusting knob on a chest pad angle-adjusting bar. The surgeon support system stabilizes a user close to a workspace for extended periods of time.

The invention relates to a chair for accommodating a person. The chair includes an upper body section having an upper body contact surface adapted or adaptable to at least parts of a front of a torso or a rear of a torso of a person placed on the chair, and a lower body section having a lower body contact surface adapted or adaptable to at least parts of at least a front of a thigh of the person, wherein the upper body section and the lower body section are arranged or arrangeable and fixable in a position relative to each other such that the upper body contact surface and the lower body contact surface cause a hyperextension posture of the hip joint of the person with a predetermined hyperextension angle. By forming the hyperextension angle of the hip on the chair, shortening of the anterior thigh and hip muscles can be counteracted. Also disclosed are a pressing device for application to the human body, which is adapted for use on a chair and which includes one or more pressure units each having at least one pressure head adapted to apply local or point pressure at a predetermined pressure location on the body of a person accommodated on the chair, and a chair having such a pressing device.

An adjustable chair, belonging to the field of office furniture, comprising a base frame. A chair back is disposed at the rear end of the base frame. A lifting assembly is disposed on the base frame and provided with a seat, and comprises a bottom frame and a top frame formed with sliding slots. The seat is disposed on the top frame and the seat angle can be adjusted. By adjusting the height of the chair through the lifting assembly and adjusting the rotation angle of the seat, users not only can stand and lean against the chair, but also can normally sit on the chair.

An assistive device for standing tasks allows for a reduction of effort on the part of a user while engaged in tasks or activities that are stationary or nearly stationary that lessens the strain on the bones, joints, and muscles normally used for standing while ensuring a proper alignment of the pelvis and spine.

A posture correcting chair having a back rest assembly providing mounting attachments for a head or neck rest, a lumbar support, at least one arm rest, and a posture retainer and supported by a seat assembly. The headrest, lumbar, seat and back support all adjust to allow a user to distribute their weight about a greater number of surfaces for adaptive comfort. A posture retainer affixed to the back rest assembly dynamically adjusts to the contour of a user's body based on force and pressure created while seated to provide active posture correction for a user to prevent slumping or slouching. A knee rest assembly is attached to rail system on a lower end of chair the base platform to provide additional support surfaces. The seat and knee rest assembly include heating, cooling or vibrating or massaging.