A mechanism to prevent an adjustment knob associated with a piece of equipment (e.g. musical instrument or amplifier) from being moved accidentally includes an inner hub held in place on an adjustable shaft. An knob body fits concentrically over the inner hub, and is biased into position over the hub. The bottom of the knob body has locking structure which lockingly but releasingly cooperates with locking structure associated with the piece of equipment to which the shaft is affixed. A biasing structure such as a spring retains the knob body in a first, locked, position, in which the knob body is prevented from rotating, which in turn prevents rotation of the adjustable shaft. However, when the knob body is pulled away from the locking structure against the spring force, the knob body can be rotated, which in turn rotates the hub and shaft shaft. Releasing the knob body allows the biasing structure to urge the knob body back into engagement with the locking structure.

A locking mechanism for a control device which utilizes rotation motion of a shaft as a means of actuation, such as a potentiometer. The locking mechanism includes a tubular body, an actuation shaft, a plurality of splines, a plurality of spline-receiving cavities, and a push-lock mechanism. The actuation shaft transfers rotation motion from a user to the control device and is slidably and rotatably positioned within the tubular body. The splines are radially distributed about the actuation shaft to interlock with the plurality of spline-receiving cavities. The spline-receiving cavities are radially positioned around the tubular body with each cavity traversing into the tubular body from an inner surface. The push-lock mechanism locks the actuation shaft relative to the tubular body and is mounted offset to a second end of the tubular body. An output coupling end of the actuation shaft is bistably coupled to the push-lock mechanism.

Embodiments of the present technology relate to safety knobs. An example automatic locking knob assembly includes a knob, a base, an adapter, and a locking sub-assembly. The locking sub-assembly is configured to automatically lock the knob into place when a valve stem of a stove is in an off position. The locking sub-assembly also allows for controlled rotation of the valve stem of the stove by actuation of buttons associated with the knob.

A rotary controller selectively-disengageable locking knob assembly, having a hub having a longitudinal axis and an axial bore extending at least partially through the inner hub along the longitudinal axis, wherein the axial bore is configured to receive a shaft of the rotary controller arranged in or on a device surface. The assembly also includes a knob concentrically disposed about at least a portion of the hub, wherein the knob includes a first engagement arrangement. A post is threadedly engaged with the radial bore so as to secure the hub to the shaft of the rotary controller, and projecting radially outwardly through the radial slot, such that rotation of the knob induces a rotation of the hub via contact of the post with the radial slot. The knob is axially moveable on the hub to selectively disengage the first engagement arrangement from contact with a second engagement arrangement.

A potentiometer device has a tubular body, an actuation shaft, splines, spline-receiving cavities, a potentiometer, a tubular housing, first and second annular cavities and retention balls. The splines are externally positioned about the actuation shaft. The spline-receiving cavities are internally positioned around the tubular body. The potentiometer has a housing body and a wiper pin. The tubular body is connected to the housing body. The tubular housing and the wiper pin are positioned within the housing body. The tubular housing is connected to the housing body. The wiper pin is mechanically coupled to the actuation shaft. The actuation shaft is removably positioned within the tubular body and the housing body. The first annular cavity internally and radially traverses into the tubular housing. The second annular cavity externally and radially traverses into an output coupling end of the actuation shaft. The retention balls are engaged within the first annular cavity.

Embodiments of the present technology relate to safety knobs. An example automatic locking knob assembly includes a knob, a base, an adapter, and a locking sub-assembly. The locking sub-assembly is configured to automatically lock the knob into place when a valve stem of a stove is in an off position. The locking sub-assembly also allows for controlled rotation of the valve stem of the stove by actuation of buttons associated with the knob.

Embodiments of the present technology relate to safety knobs. An example automatic locking knob assembly includes a knob, a base, an adapter, and a locking sub-assembly. The locking sub-assembly is configured to automatically lock the knob into place when a valve stem of a stove is in an off position. The locking sub-assembly also allows for controlled rotation of the valve stem of the stove by actuation of buttons associated with the knob.

An operating element for a domestic appliance includes a main body which is made of a material comprised of plastic and a filler admixed to the plastic. The filler has a thermal conductivity which is higher than a thermal conductivity of the plastic. The filler can be present in particle form, e.g. as spheres, grains, fibers or as powder.

An operation member for an electronic device is provided. The electronic device includes a casing having portions defining an opening and a circuit module having a circuit board. The circuit board includes a controller. The operation member includes a body including an operating end and a coupling end, and a skirt member. The body is configured to partially protrude through the opening of the casing for operating. The skirt member is arranged at the coupling end. The skirt member includes a base plate outwardly extending from the coupling end, a wall upwardly extending from peripheral portions of the base plate, and a groove defined between the wall and the body. The operation member is configured to associate with the electronic device, and the operation member with the body and the skirt is completely separated from the casing.

A valve comprises a housing, a control handle rotatable relative to the housing, a flow control mechanism in the housing and connected with the control handle, stop seats formed on the housing, a locking body in contact with the control handle, stopping portions formed in the locking body and movable between a locking position in which the stopping portions engage the stop seats and a release position in which the stopping portions are moved away from the stop seats, a control surface formed in the handle. The handle is movable between a lowered position towards the housing and a position raised from the housing. In the raised position, the control surface pushes the stopping portions in the locking position and, in the lowered position, the control surface allows the stopping portions to return in the release position.