Joint arrangement (10) has a hollow cylindrical receiving cylinder (20) that extends in a cylinder axis direction (Z) and receives one end of a chair column (30) of an active-dynamic wobble chair, the latter movably mounted in a substantially hollow cylindrical outer joint shell (40) composed of joint shell segments (45). Movable mounting of receiving cylinder (20) is achieved by deformable elastic elements (50) arranged to be variable in shape and position in a bearing gap (60) between an outer wall portion (21, 22) of the receiving cylinder (20) and an inner wall portion (41, 42) of the joint shell (40). Receiving cylinder (20) is actuated in a force-dependent manner, whereby shape and/or position of the elastic elements (50) change as viewed in a radial direction (Rs) from changing, preferably reducing, clearance of the bearing gap (60) when the receiving cylinder (20) is actuated in a cylinder axis direction (Z).

There is noticed a dynamic frame of the chair, which comprises a seat holder (1), to which a swivel sleeve (3) is demountably attached from one side, into which a spherical head (41) of a spherical thread swivel (4) with a threaded end piece (42) is tightly seated, to which a nut (7) is demountably attached and to which a silent block bushing (2) is demountably attached from the other side, to which an annular locking ring (6) with four locking undercuts (61) and four locking noses (62) is demountably attached from one side and a frame sleeve (5) with a sliding hole (53) and four sleeve noses (51) and four sleeve reinforcement pieces (52) is detachably fastened from the other side.

The invention discloses a device for correcting the position of the heart when measuring blood pressure, which comprises a base, and a first support unit, a second support unit and a third support unit are arranged in parallel on the upper part of the base. The present invention adopts an integrated design, which makes the structure of the whole device relatively stable, and can avoid accidents that medical staff and patients fall when measuring blood pressure, especially for hypertensive patients over 75 years old. It directly threatens its life safety, thereby effectively ensuring the safety of the patient at the time of the visit; it can proofread the patient's heart position when measuring blood pressure, which can ensure that the patient's right arm elbow is on the same level as the patient's heart, thereby making the patient

A balance chair, comprising a seat, an in substance vertical height element supporting the seat, and a base supporting the height element and seat, distinctive in that the balance chair comprises a rotation and tilt element, arranged in a position in substance midway between the seat and a lower end of the base.

The invention relates to a piece of seating and supporting furniture with a seating and supporting body, comprising: a height-adjustable column; a seating and supporting body, which is mounted pivotably about at least one horizontal axis between a first end position and a second end position at a first end of the height-adjustable column; a stopping mechanism, which is situated at a second end of the height-adjustable column; and a locking mechanism for releasably locking the stopping mechanism. A seating and supporting piece of furniture which allows reliable and user-friendly operation is created according to the invention in that a transfer device is used to release the locking of the stopping mechanism by the locking mechanism via the pivoting of the seating and supporting body between the first end position and the second end position.

A guide spring for a seating device has an inner portion, an outer portion, and a spiral coiled portion extending more than one convolution between the inner portion and the outer portion. The inner portion is firmly attached to a rod and the outer portion is firmly attached to a body. The guide spring thereby secures a radial position of the rod within the body, allowing the rod to move axially relative to the body when a load is placed onto the seating device. When in use, the guide spring deforms from a flat spiral shape to a conical spiral shape with axial movement of the rod relative to the body.

A balance chair, comprising a seat, an in substance vertical height element supporting the seat, and a base supporting the height element and seat, distinctive in that the balance chair comprises a rotation and tilt element, arranged in a position in substance midway between the seat and a lower end of the base.

The invention relates to a piece of seating and supporting furniture with a seating and supporting body, comprising: a height-adjustable column; a seating and supporting body, which is mounted pivotably about at least one horizontal axis between a first end position and a second end position at a first end of the height-adjustable column; a stopping mechanism, which is situated at a second end of the height-adjustable column; and a locking mechanism for releasably locking the stopping mechanism. A seating and supporting piece of furniture which allows reliable and user-friendly operation is created according to the invention in that a transfer device is used to release the locking of the stopping mechanism by the locking mechanism via the pivoting of the seating and supporting body between the first end position and the second end position.

A guide spring for a seating device has an inner portion, an outer portion, and a spiral coiled portion extending more than one convolution between the inner portion and the outer portion. The inner portion is firmly attached to a rod and the outer portion is firmly attached to a body. The guide spring thereby secures a radial position of the rod within the body, allowing the rod to move axially relative to the body when a load is placed onto the seating device. When in use, the guide spring deforms from a flat spiral shape to a conical spiral shape with axial movement of the rod relative to the body.

A chair comprises a seat with a seat carrier comprising a buttock section at the rear and a knee section at the front, a height adjustment device coupled to the seat, and a foot part configured to be placed on a surface. The height adjustment device is configured to change the distance between the seat and the foot part. The seat is designed in such a manner that a height of the buttock section of the seat carrier and a height of the knee section of the seat carrier can be changed relative to one another. The chair further comprises a blocking structure configured to block the height adjustment device when the height of the buttock section of the seat carrier and the height of the knee section of the seat carrier are in a target position relative to one another.