A safety mechanism for medical treatment devices includes a switch actuator that depresses a power activation switch after movement in a first direction followed movement in a second direction. The safety mechanism thus prevents accidental or unintentional delivery of power to a heating segment of the medical treatment device.

A remote control device is disclosed. A single-piece casing has a first opening at one end, a second opening at another end, an inner cavity between the first and second openings, and a front opening and key openings in a front surface. A keypad is disposed within the inner cavity and has keys arranged on a surface of the keypad which extend through the key openings. A chassis body is inserted into the inner cavity though the first opening and below the keypad. The chassis has an end part located outside of the casing. An edge of the end part is configured to abut against one end of the casing. An end insert body is inserted into the inner cavity though the second opening, below the body of the chassis. The end insert has an end part located at the another end of the casing.

A portable electronic device includes a casing with a casing pivotal portion and a key device. The key device is installed on the casing and includes a button cap. The button cap includes a cap pivotal portion, a first cap body and a second cap body. The cap pivotal portion is pivoted to the casing pivotal portion. The first cap body extends from the cap pivotal portion along a first axis. The second cap body extends from the first cap body along a second axis. The button cap rotates in an activating direction when the first cap body is applied by an external force along the first axis or when the second cap body is applied by the external force along the second axis.

A switch assembly is adapted to be disposed in a holding portion of a hand-held device. The switch assembly includes first and second keys, first and second connecting portions, a switch element and a plunger. The first and second keys are exposed on the surface of the holding portion and respectively disposed on the opposite sides thereof. The first and second connecting portions respectively connect the first and second keys and the holding portion. The first and second connecting portions are disposed for allowing the first key having a displacement toward the second key along their connecting direction. The switch element is located inside of the holding portion, and the first key has a first backside toward the second key. The second key has a second backside toward the first key. The plunger is adapted to press and activate the switch element through the displacement.

The computer keyboard operable in motion includes keys and control circuitry, and communication means to connect the keyboard to an in-motion operable mobile computer. The keyboard has one key column for the thumb; one key column for the index finger; and one key column for the middle finger; one key column for the ring finger; one key column for the little finger. The keys on which the tips of the fingers rest at the same time do not form a straight row of keys. The keyboard enables not only touch typing but also voice/key interface mode operation of the smartphone to which the keyboard is connected. In the voice/key interface mode, the computer uses voice and the user uses key inputs to interact each other.

A control device may include a removable faceplate, a planar printed circuit board (PCB), a structure located between the faceplate and the PCB, one or more LEDs (e.g., side firing LEDs) mounted to the PCB, and a light-guiding component. The structure may include an antenna configured to transmit or receive radio frequency signals. The faceplate may be configured to be mounted to the control device, and may include a light-conductive body and an opaque material provided on a front surface of the faceplate. At least one indicia may be engraved in the opaque material. The light-guiding component may include a planar portion and a curved portion. The planar portion may be located between the faceplate and the structure. The curved portion may extend between the LEDs on the printed circuit board and the planar portion to transmit light generated by the LEDs to the faceplate to illuminate the indicia.

A trigger assembly and scanner terminal are described. The trigger assembly includes two parts. A rigid first part stores a pressure sensitive switch and a printed circuit board. An elastic second part contacts the pressure sensitive switch in response to a level of pressure applied to the trigger assembly. The first part and second part are formed from a continuous piece.

A portable electronic device includes a casing with a casing pivotal portion and a key device. The key device is installed on the casing and includes a button cap. The button cap includes a cap pivotal portion, a first cap body and a second cap body. The cap pivotal portion is pivoted to the casing pivotal portion. The first cap body extends from the cap pivotal portion along a first axis. The second cap body extends from the first cap body along a second axis. The button cap rotates in an activating direction when the first cap body is applied by an external force along the first axis or when the second cap body is applied by the external force along the second axis.

This application provides a button, at least a part of an end of an inner button close to an outer button is built into the outer button, the inner button is disposed on a back surface of the outer button, a size of the outer button in a width direction of the button is the same as a size of at least a part of a function part of the inner button in the width direction of the button, one outer side wall of the outer button in a length direction of the button is flush to one outer side wall of the function part in the length direction of the button, and the other outer side wall of the outer button in the length direction of the button is flush to the other outer side wall of the function part in the length direction of the button.