The present disclosure relates to the field of kitchen appliances, and has disclosed a microwave oven, which comprises a cabinet and a door, a damper assembly is mounted on one side of the cabinet facing the door in a way that it produces damping force for preventing the door from closing when the door approaches to a closed position. In the present disclosure, a damper assembly is arranged on one side of the cabinet facing the door; thus, the damper assembly can effectively decrease the speed of collision of the door with the cabinet in the closing process when the door approaches to a closed position, and thereby greatly reduce the noise generated when the door is closed. In that way, not only the grade of the product is improved, but also the user experience and satisfaction is improved.

The present disclosure provides a rotational spring dampener that has a compression limiter, a first disk, and a second disk. The first disk is disposed at a first end of the compression limiter and the second disk is disposed at a second end of the compression limiter, where the second end is opposite the first end. The rotational spring dampener also has a tensile member. The tensile member is connected to the first disk and the second disk. The tensile member is composed of a block copolymer

The present disclosure provides a rotational spring dampener that has a compression limiter, a first disk, and a second disk. The first disk is disposed at a first end of the compression limiter and the second disk is disposed at a second end of the compression limiter, where the second end is opposite the first end. The rotational spring dampener also has a tensile member. The tensile member is connected to the first disk and the second disk. The tensile member is composed of a block copolymer

A multi-dimensional magnetic negative-stiffness mechanism and a multi-dimensional magnetic negative-stiffness vibration isolation system composed thereof are provided. The multi-dimensional damping system is composed of a positive-stiffness mechanism, a multi-dimensional negative-stiffness mechanism, a floating frame, a vibration isolated body, and a mounting base. The positive-stiffness mechanism is a traditional elastic element connected to the vibration isolated body and the mounting base, and provides supporting forces in an X direction, a Y direction, and a Z direction, and a basic vibration isolation function. The multi-dimensional negative-stiffness mechanism is composed of at least two negative-stiffness magnetic groups. Each negative-stiffness magnetic group may provide one-dimensional or two-dimensional negative stiffness. Through a series connection of the at least two negative-stiffness magnetic groups, a two-dimensional or three-dimensional negative-stiffness effect may be implemented to improve the vibration isolation performance of the system in multiple dimensions.

A multi-dimensional magnetic negative-stiffness mechanism and a multi-dimensional magnetic negative-stiffness vibration isolation system composed thereof are provided. The multi-dimensional damping system is composed of a positive-stiffness mechanism, a multi-dimensional negative-stiffness mechanism, a floating frame, a vibration isolated body, and a mounting base. The positive-stiffness mechanism is a traditional elastic element connected to the vibration isolated body and the mounting base, and provides supporting forces in an X direction, a Y direction, and a Z direction, and a basic vibration isolation function. The multi-dimensional negative-stiffness mechanism is composed of at least two negative-stiffness magnetic groups. Each negative-stiffness magnetic group may provide one-dimensional or two-dimensional negative stiffness. Through a series connection of the at least two negative-stiffness magnetic groups, a two-dimensional or three-dimensional negative-stiffness effect may be implemented to improve the vibration isolation performance of the system in multiple dimensions.

A coupling-damping thin layer of gap-filling material to be used at interfaces under compression and the thickness control techniques. The thickness of the layer is proposed to be controlled by an insertion of an elastic material into the gap-filling material. By selection of appropriate stiffness of the elastic material and the viscosity of the gap-filling material, the dynamic properties of the layer can be controlled to optimise vibration dissipation through hysteresis loop damping.

A coupling-damping thin layer of gap-filling material to be used at interfaces under compression and the thickness control techniques. The thickness of the layer is proposed to be controlled by an insertion of an elastic material into the gap-filling material. By selection of appropriate stiffness of the elastic material and the viscosity of the gap-filling material, the dynamic properties of the layer can be controlled to optimise vibration dissipation through hysteresis loop damping.

A spring for a spring shoe, the spring including a conical disk, the conical disk having a flexible flange around the perimeter of the conical disk. A spring comprising a conical disk and a ring spring around the conical disk, the ring spring being movable up and down relative to the conical disk to adjust the spring force of the spring. A threaded engagement between the ring spring and the conical disk so that rotation of the conical disk moves the ring spring up or down relative to the conical disk. A damper ring around the perimeter of the conical disk to resist the expansion of the circumference of the conical disk. An eccentric ring or cam to adjust the position of the apex of the conical disk relative to an insole by rotating the eccentric ring or cam. An asymmetric conical disk to adjust the position of the apex of the conical disk by rotating the conical disk. A damper for a spring shoe comprising a flexible container containing a material with little or no propensity to return to its original shape. A spring array for a spring shoe, the springs of the spring array having a reducing force resisting compression over at least a portion of the spring range of travel as the spring compresses, and there being a damper associated with the array to oppose compression of the array towards maximum compression.

A spring for a spring shoe, the spring including a conical disk, the conical disk having a flexible flange around the perimeter of the conical disk. A spring comprising a conical disk and a ring spring around the conical disk, the ring spring being movable up and down relative to the conical disk to adjust the spring force of the spring. A threaded engagement between the ring spring and the conical disk so that rotation of the conical disk moves the ring spring up or down relative to the conical disk. A damper ring around the perimeter of the conical disk to resist the expansion of the circumference of the conical disk. An eccentric ring or cam to adjust the position of the apex of the conical disk relative to an insole by rotating the eccentric ring or cam. An asymmetric conical disk to adjust the position of the apex of the conical disk by rotating the conical disk. A damper for a spring shoe comprising a flexible container containing a material with little or no propensity to return to its original shape. A spring array for a spring shoe, the springs of the spring array having a reducing force resisting compression over at least a portion of the spring range of travel as the spring compresses, and there being a damper associated with the array to oppose compression of the array towards maximum compression.

The invention relates to the field of transport mechanical engineering and concerns friction shock absorbers for vehicles. The object of the invention is to improve the operational life, performance and reliability of a friction shock absorber. The friction shock absorber comprises housing (1) with bottom (2) and with orifice (3) formed by walls (4), internal surfaces (fv) whereof form alternating working beds (V1) and connecting beds (V2), and further comprises friction assembly (5) consisting of pressure wedge (6) and stay wedges (7) in contact with same, said stay wedges being provided with friction surfaces (fp), while return-and-retaining device (8) is located between bottom (2) and friction assembly (5). In addition, the area (S1) of contact between friction surfaces (fp) of stay wedges (7) and internal surfaces (fv) of walls (4) of orifice (3) in working beds (V1) exceeds the corresponding area (S2) of contact in the connecting beds (V2). The internal surfaces (fv) may be straight, while the values of angles (θ1) between adjacent internal surfaces (fv), which form working beds (V1), are lower than the values of angles (θ2) between adjacent internal surfaces (fv), which form the connecting beds (V2). The thickness of walls (4) of the orifice (3) is variable with an increase in the direction from the working bed (V1) to the connecting bed (V2). The contact between pressure wedge (6) and stay wedges (7) is provided along linked curved surfaces (fκ).