A complex spring unit (10) comprises at least a first spring portion (12) and a second spring portion (14), which first and second spring portions are integrally formed, wherein the first spring portion is arranged in use to be placed under compression, and the second spring portion is arranged in use to be placed under tension, during compression of the complex spring unit.

A deformable body, wherein the body is constructed from a multiplicity of layers of a polymer construction material and in which a construction direction is defined perpendicular to the layers. The body preferably comprises layers with a multiplicity of curve pairs (10) which are formed by the construction material and which run in the same direction as one another, the curve pairs comprise in each case two periodic curves (20, 30) running oppositely with respect to one another, and the curve pairs comprise portions of maximum spacing to one another (40, 41, 60, 61) and portions of minimum spacing to one another (50, 51, 70, 71). In one part of the layers, in adjacent curve pairs (10), at least one portion of maximum spacing (41) of one curve is connected to a portion of maximum spacing (60) of an adjacent curve, in a further part of the layers, in adjacent curve pairs (10), at least one portion of maximum spacing (41) of one curve is not connected to a portion of maximum spacing (60) of an adjacent curve, in a further part of the layers, in adjacent curve pairs (10), at least a part of the portions of minimum spacing (50, 51) are connected to one another, and in a further part of the layers, in adjacent curve pairs (10), at least a part of the portions of minimum spacing (50, 51) are not connected to one another. The invention also relates to a method for producing the body and to a device for supporting and/or bearing a person having the body according to the invention. The boy may be used inter alia as a mattress or as a vehicle seat.

A posturized comfort layer for a bedding or seating product has different sections of different firmness due to different mini coil springs within the sections. The springs may be individually pocketed between two sheets of non-woven polypropylene fabric joined with circular or rectangular weld seams. Regardless of the shape of the weld seams, the different firmness of the different sections of the comfort layer may be due to different mini coil springs contained in the pockets. All pockets may have the same spring, the springs may be contained in different size weld seams to create pockets of different heights.

Disclosed is an arcuate pocketed spring (1), comprising a plurality of individual springs (12) connected at intervals, wherein the individual springs (12) are packaged in an arcuate manner in a cloth-like material (13). Compared with traditional pocketed springs, the arcuate pocketed spring has better flexibility. In addition to better flexibility, a pocketed spring mattress formed by combining the pocketed springs (1) of such a structure has more space inside for filling with other functional materials.

A mattress comprising a first layer comprising at least one trench extending laterally from a first side of the layer to an opposite side of the layer; a plurality of support members disposed in each trench; and a second layer disposed over at least the at least one trench. Another mattress comprising a first layer comprising at least one channel extending laterally from a first side of the layer to an opposite side of the layer; a plurality of support members disposed in each channel; and a second layer encompassing the first layer. A mattress assembly comprising one of the mattresses and a mattress foundation.

A mattress comprising a first layer comprising at least one channel extending laterally from a first side of the layer to an opposite side of the layer, and a plurality of foam spheres or hemispheres disposed in each channel. A mattress assembly comprising the mattress and a mattress foundation.

A high tension coil spring structure for a bed mattress includes spring bodies and exposed wiring portions which absorb an external load. Diameter-increasing portions (A) are formed on at least one of upper and/or lower end wiring portions (14, 14) of body wiring portions (12), and provide spaces in which upper and/or lower exposure start wiring portions (16-5, 16-5) move upward and downward. Rigid support ends (18) are formed on at least one of the body wiring portions (12) and upper and lower exposed wiring portions (16, 16), and absorb a compressive load. The diameter-increasing portions and the rigid ends of the coil spring structure fundamentally prevent noise caused by friction between the exposed wiring portions and surrounding wiring portions when the exposed wiring portions are compressed and significantly increase the elasticity of the exposed wiring portions.

The invention relates to the field of beds or seats. In particular, the invention relates to a flexible element (10) stiffness that is adjustable stiffness along a compression axis (Z), the element including a compression spring (50). In order to enable the stiffness of the stiffness element (10) to be adjusted, it further comprises both a mechanism (150) coupled to the compression spring (50) so as to be actuated by compression of the compression spring (50) along the compression axis (Z) to move in a direction other than the direction of the compression axis (Z), and also an adjustment device for selectively restricting or releasing the movement of the mechanism (150). The invention also provides a unit (200) comprising a plurality of such flexible elements (10), and a method of adjusting the stiffness of the flexible element (10).

A mattress comprising at least one support layer comprising at least one non-linear channel extending laterally from a first side to an opposite side, and a plurality of support members disposed in the channel. The mattress may comprise a comfort layer, such as a viscoelastic foam layer, above the support layer. A mattress assembly comprising the mattress and a mattress foundation.

A coil-in-coil spring is provided that exhibits a variable and non-linear loading response upon compression. The spring comprises a continuous wire including a first spring portion having a first spring constant, a second spring portion having a second spring constant less than the first spring constant, and a third spring portion having a third spring constant less than the first spring constant and less than the second spring constant. In the coil-in-coil spring, the first spring portion forms an outer coil of the coil-in-coil spring and the second spring portion, the third spring portion, or both the second spring portion and the third spring portion are positioned within the first spring portion and form an inner coil of the coil-in-coil spring. A multi-coil spring is also provided that includes an outer coil, an intermediate coil positioned within the outer coil, and an inner coil positioned with the intermediate coil.