A key, a lock core and a lock, relating to a key, a lock core and a lock are provided. The key includes: a column body, a first end of the column body being provided with a light emitting component; a first cathode component disposed on the column body and connected to one end of the light emitting component to be mated with a second cathode component in the lock core; a first piezoelectric electrode disposed on the column body and connected to the other end of the light emitting component to be pressed against a second piezoelectric electrode in the lock core. When the first cathode component is mated with the second cathode component in the lock core, and the first piezoelectric electrode is pressed against the second piezoelectric electrode in the lock core, a piezoelectric current is generated, to cause the light emitting component to emit light.

A door-locking module for a door of a household appliance includes a housing; a printed circuit board (PCB), received within the housing and further includes at least one first actuator switch adapted to open and close a predetermined first circuit of the PCB. A locking pin is configured to move between a locked position, affecting the door into a locked state, and an unlocked position, affecting the door into an unlocked state. An actuator is operably coupled to the locking pin so as to controllably move the locking pin between the unlocked position and the locked position. A locking ring is operably coupled between the actuator and the at least one first actuator switch and includes a trigger member adapted to operably engage with the signal actuator, and at least one cam guide adapted to cooperate with a corresponding cam follower of the locking pin.

A method and apparatus for determining whether a door is closed and locked. A door lock system includes a bolt, transmitter circuitry, and receiver circuitry. The bolt includes a first end that is extendible to engage a strike plate. The first end includes an opening, and channel extends from the opening longitudinally through the bolt. The transmitter circuitry is coupled to the bolt, and is configured to transmit a signal into the channel. The receiver circuitry is coupled to the bolt, and is configured to detect a reflection of the signal returned through the channel.

A piezoelectric energy harvester system for collecting kinetic energy is provided, wherein the kinetic energy is converted into electrical energy, and wherein at least a portion of the converted electrical energy is utilized to operate a load. The system comprises an energy input portion and an energy harvesting portion. The energy input portion includes an input member configured to be actionable by an outside force. The energy harvesting portion includes a capture member, a sprocket portion, and a piezoelectric energy harvester. The capture member is adapted for receiving mechanical input from the input member. The sprocket portion is disposed for movement with the capture member. The sprocket portion includes at least one radially disposed sprocket actuator configured for making contact with and exciting the piezoelectric energy harvester. The piezoelectric energy harvester is excited by the contact to produce the kinetic energy.

A piezoelectric energy harvester system for collecting kinetic energy is provided, wherein the kinetic energy is converted into electrical energy, and wherein at least a portion of the converted electrical energy is utilized to operate a load. The system comprises an energy input portion and an energy harvesting portion. The energy input portion includes an input member configured to be actionable by an outside force. The energy harvesting portion includes a capture member, a sprocket portion, and a piezoelectric energy harvester. The capture member is adapted for receiving mechanical input from the input member. The sprocket portion is disposed for movement with the capture member. The sprocket portion includes at least one radially disposed sprocket actuator configured for making contact with and exciting the piezoelectric energy harvester. The piezoelectric energy harvester is excited by the contact to produce the kinetic energy.

The present invention relates to a closure guard for a bottle, comprising a first housing part and a second housing part, which are configured to non-releasably enclose an upper portion of the neck of the bottle to be secured, including the bottle closure, when in a securing state, wherein the first housing part and the second housing part are interconnected so as to be movable relative to one another and are transferable between the securing state and a release state, in which the closure guard can be released from the neck, and a locking mechanism which is associated with either the first housing part or the second housing part and is configured to lock the first housing part and the second housing part in the securing state.

The present disclosure relates generally to accessories for containers. More specifically, but without limitation, the present disclosure relates to a locking module for a container, for example insulated container, which allows access to store goods, such as delivered goods, but alternately denies access to those who are not intended to have access.