A rocker arm structure of a hand-operated bean grinder includes a crank rocker arm and a folding mechanism. The crank rocker arm has first and second sections of rod body, and the folding mechanism is assembled between the first and second sections of rod body. The folding mechanism includes a first and second bodies assembled with each other. A spring is assembled between the first and second rod bodies, and a guide rail seat and a guide pin are respectively arranged on the first and second bodies. The guide rail seat is arranged on the second assembly port, and is arranged with a guide rail, a positioning groove, and at least one assembly notch. The guide rail has a position for guiding the first section of rod body to rotate 180 degrees from the position to be ground.

An electric grinder is provided that includes a shell. The shell accommodates a grinding mechanism, a reducing mechanism and a power mechanism. The electric grinder also comprises a grinding chamber, where said grinding mechanism is at one end of said grinding chamber, said power mechanism and said reducing mechanism are at the other end of said grinding chamber. The grinding chamber is provided with a filling hole, and a chamber cover is provided opposite to said filling hole. The filling hole of said grinding chamber can be opened or closed by turning said chamber cover. The electric grinder is designed so that the filling hole of the grinding chamber can be easily opened or closed by turning the chamber cover. After the chamber cover rotates and closes the filling hole, the grinding chamber is sealed and no material will flow out easily, and the chamber cover will not fall off.

An electric grinder is provided that includes a shell. The shell accommodates a grinding mechanism, a reducing mechanism and a power mechanism. The electric grinder also comprises a grinding chamber, where said grinding mechanism is at one end of said grinding chamber, said power mechanism and said reducing mechanism are at the other end of said grinding chamber. The grinding chamber is provided with a filling hole, and a chamber cover is provided opposite to said filling hole. The filling hole of said grinding chamber can be opened or closed by turning said chamber cover. The electric grinder is designed so that the filling hole of the grinding chamber can be easily opened or closed by turning the chamber cover. After the chamber cover rotates and closes the filling hole, the grinding chamber is sealed and no material will flow out easily, and the chamber cover will not fall off.

An apparatus for containing a material, such as coffee beans, that may be used with a grinding apparatus. The apparatus may have a directing component to guide a controlled dose of material toward the grinding apparatus. In one embodiment, the apparatus has a container with a base portion that engages a grinding apparatus. The container, when engaged with the grinding apparatus, can direct coffee beans toward the grinding apparatus and has a door that releases a controlled dose of beans. The grinding apparatus may have a movable tongue to cause excess grounds caught on interior components of the grinding apparatus to exit the grinding apparatus. The apparatus, systems, and methods reduce labor associated with grinding the material and allow a user, such as a barista, to more efficiently prepare brewed beverages, such as single-cup portions of coffee.

An apparatus for containing a material, such as coffee beans, that may be used with a grinding apparatus. The apparatus may have a directing component to guide a controlled dose of material toward the grinding apparatus. In one embodiment, the apparatus has a container with a base portion that engages a grinding apparatus. The container, when engaged with the grinding apparatus, can direct coffee beans toward the grinding apparatus and has a door that releases a controlled dose of beans. The grinding apparatus may have a movable tongue to cause excess grounds caught on interior components of the grinding apparatus to exit the grinding apparatus. The apparatus, systems, and methods reduce labor associated with grinding the material and allow a user, such as a barista, to more efficiently prepare brewed beverages, such as single-cup portions of coffee.

A electronic grinder includes a base and a cup, the cup defining a pulverization chamber. A drive shaft connected to an electric motor terminates inside the pulverization chamber at a blade group. The blade group is magnetically removable from the end of the drive shaft for easy cleaning and replacement. The end of the cup opposite from the base in includes a fixed ring and a moveable cap that rotates or swivels about a pin connecting the two components for easy access to the contents of the pulverization chamber. The electric motor is controlled by a microcontroller operable by a power button and a control button. An inductive switch configured as a triggering member is disposed between the base and cup to detect whether the two components are connected in order to prevent inadvertent use of the grinder.

A handheld kitchen appliance assembly including a drive unit having a housing, a rechargeable battery disposed within the housing, and a motor disposed within the housing and powered by the battery. The handheld appliance assembly also includes a tool having an attachment portion for releasably connecting the tool to the drive unit. The tool is selectively driven by the drive unit when the tool is connected to the drive unit. A charging unit includes a cavity sized and shaped to receive a portion of the drive unit. The charging unit includes a power supply and is configured to send a charging current to the battery of the drive unit to recharge the battery when the drive unit is received within the cavity. A cradle includes an opening sized and shaped to support the tool when the tool is disconnected from the drive unit. The cradle includes a linkage that is engagable with the charging unit for selectively connecting the cradle to the charging unit.

A handheld kitchen appliance assembly including a drive unit having a housing, a rechargeable battery disposed within the housing, and a motor disposed within the housing and powered by the battery. The handheld appliance assembly also includes a tool having an attachment portion for releasably connecting the tool to the drive unit. The tool is selectively driven by the drive unit when the tool is connected to the drive unit. A charging unit includes a cavity sized and shaped to receive a portion of the drive unit. The charging unit includes a power supply and is configured to send a charging current to the battery of the drive unit to recharge the battery when the drive unit is received within the cavity. A cradle includes an opening sized and shaped to support the tool when the tool is disconnected from the drive unit. The cradle includes a linkage that is engagable with the charging unit for selectively connecting the cradle to the charging unit.

A method for actuating an electric motor includes modulating a drive power provided to the electric motor by using a ramp function for a change in rotational speed of the electric motor from a starting rotational speed to a target rotational speed. The target rotational speed is only reached after at least 200 ms, starting from the starting rotational speed. An apparatus, a fully automatic coffee machine having the apparatus, a computer program product and a computer-readable storage medium are also provided.