The invention relates to a roller wrench comprising: a body with a circular chamber; a driving member being a regular polygonal component capable of rotating in the chamber; a plurality of rollers installed in the chamber, each of the rollers is located between a side of the driving member and a peripheral wall of the chamber;

and a reversing knob capable of driving the rollers to move in the chamber so that each of the rollers moves between two edges of each of the sides of the driving member; each of the sides of the driving member has a central area, a concave latching surface is respectively provided on two sides of the central area, and a concave state of each of the latching surfaces is gradually concaved inwardly from an inner side to an outer side; when each of the rollers is located on one edge of each of the sides, a peripheral surface of the roller contacts with the latching surface and the peripheral wall of the chamber, so that the body, the rollers and the driving member are latched with one another.

The invention relates to a roller wrench comprising: a body with a circular chamber; a driving member being a regular polygonal component capable of rotating in the chamber; a plurality of rollers installed in the chamber, each of the rollers is located between a side of the driving member and a peripheral wall of the chamber; a reversing knob capable of driving the rollers to move in the chamber so that each of the rollers moves between two edges of each of sides of the driving member; and at least one elastic positioning component installed on one of the sides of the driving member, and capable of elastically moving into the driving member or protruding from a peripheral surface of the driving member; the elastic positioning component is moved into the driving member when being compressed; and is protruded from the driving member when not being acted on by an external force; and each of the elastic positioning components limits one of the rollers, thereby positioning the rollers and the reversing knob.

The invention relates to a roller wrench comprising: a body with a circular chamber; a driving member being a regular polygonal component capable of rotating in the chamber; a plurality of rollers installed in the chamber, each of the rollers is located between a side of the driving member and a peripheral wall of the chamber; a reversing knob capable of driving the rollers to move in the chamber so that each of the rollers moves between two edges of each of sides of the driving member; and at least one elastic positioning component installed on one of the sides of the driving member, and capable of elastically moving into the driving member or protruding from a peripheral surface of the driving member; the elastic positioning component is moved into the driving member when being compressed; and is protruded from the driving member when not being acted on by an external force; and each of the elastic positioning components limits one of the rollers, thereby positioning the rollers and the reversing knob.

A multi-directional adjustable armrest pad and a chair armrest device with an armrest pad are disclosed and three embodiments are provided. In an embodiment, the pad body can be adjusted to move in a longitudinal direction and a lateral direction, and rotate relative to the chair armrest, and the pad body can be lifted by controlling a regulating assembly, and the regulating assembly is also rotatable and pivotally swingable, so as to make the armrest pad suit placement of a user's hand when the user sits on the chair.

A drive device capable of allowing a brake operation of a braking mechanism of the drive device to suppress a mechanical load applied to a mechanism unit (i.e., a robot mechanical section) provided with the drive device. The drive device includes a first braking mechanism provided in a first motor to execute a first brake operation on an operation shaft, a second braking mechanism provided in a second motor to execute a second brake operation on the operation shaft, and a brake controller configured to control the first braking mechanism and the second braking mechanism to allow the first brake operation and the second brake operation to be continuously executed after starting the first brake operation before starting the second brake operation.

A drive device capable of allowing a brake operation of a braking mechanism of the drive device to suppress a mechanical load applied to a mechanism unit (i.e., a robot mechanical section) provided with the drive device. The drive device includes a first braking mechanism provided in a first motor to execute a first brake operation on an operation shaft, a second braking mechanism provided in a second motor to execute a second brake operation on the operation shaft, and a brake controller configured to control the first braking mechanism and the second braking mechanism to allow the first brake operation and the second brake operation to be continuously executed after starting the first brake operation before starting the second brake operation.

The invention relates to a fluid coupling (1) with tolerance compensation for the flexible connection of two media-conducting elements. The invention was based on the object of improving a fluid coupling (1) of the described type in such a manner that the use of complicated latching systems for transport can be omitted. This object is achieved in that the fluid coupling (1) has at least one transport securing device (8, 12), by means of which a separation of the components (2, 3) of the fluid coupling (1) from one another prior to installation can be prevented.

A rotary device includes a rotatable member and a limiting member. The rotatable member includes a positioning mechanism, the positioning mechanism includes a stopping member and a positioning member. When the rotatable member rotates along a first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move away from the stopping portion and rotate relative to the stopping member, so that the positioning member to passes through the limiting member; when the rotatable member rotates along a second rotation direction opposite to the first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move close to the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion, to position the rotatable member.

A rotary device includes a rotatable member and a limiting member. The rotatable member includes a positioning mechanism, the positioning mechanism includes a stopping member and a positioning member. When the rotatable member rotates along a first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move away from the stopping portion and rotate relative to the stopping member, so that the positioning member to passes through the limiting member; when the rotatable member rotates along a second rotation direction opposite to the first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move close to the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion, to position the rotatable member.

A drive device capable of allowing a brake operation of a braking mechanism of the drive device to suppress a mechanical load applied to a mechanism unit (i.e., a robot mechanical section) provided with the drive device. The drive device includes a first braking mechanism provided in a first motor to execute a first brake operation on an operation shaft, a second braking mechanism provided in a second motor to execute a second brake operation on the operation shaft, and a brake controller configured to control the first braking mechanism and the second braking mechanism to allow the first brake operation and the second brake operation to be continuously executed after starting the first brake operation before starting the second brake operation.