The present disclosure relates to a protective relay. According to the present disclosure, the handle is fixed or separated by a lever structure rather than a gear structure, so that the user may easily fix or separate the handle to or from the outer casing. Therefore, convenience and operability of the user are improved.

A neuromuscular stimulation device is described having a plastic casing housing a printed circuit board bearing control electronics, with the casing including an external integral flexible portion which is capable of being flexed into the interior of the casing so as to cause an electrically insulative substrate on which is carried an electrically conductive pathway to be pushed into contact with the PCB in order to complete an electrical circuit. Such a switch is relatively inexpensive to produce, as it has few moving parts, can be formed in a usual manufacturing process, and is robust.

An electronic device, according to one embodiment of the present invention, can comprise: a housing which has an opening part penetrating through the inside and the outside of the electronic device and forms the outside of the electronic device; a key button inserted into the opening part so as to be movable; a sealing member which is disposed such that the sealing member slidably contacts the outer surface of the key button, and prevents communication between the inside and the outside of the electronic device through the inner surface of the opening part and the outer surface of the key button; and a push switch accommodated in the housing and pressed by an inward movement of the key button. Various other embodiments are possible.

A keyboard device includes a supporting plate, a keycap, a stopping structure and a switching module. The stopping structure is arranged between the supporting plate and the keycap, and located near an outer edge of the keycap. The switching module is located under the keycap and connected with the stopping structure. While the switching module is moved relative to the supporting plate in a second axial direction, the stopping structure is correspondingly moved. When the switching module is in a first status, the stopping structure is located near the outer edge of the keycap. When the switching module is in a second status, the stopping structure is moved to a position under the first outer edge of the keycap to stop the movement of the keycap.

An electric power tool has a tool housing, and a trigger switch fixed inside the tool housing. The tool housing internally has a trigger switch fixing unit configured to fix the trigger switch. The trigger switch fixing unit is provided with a vibration damping elastic body interposed between the trigger switch fixing unit and the trigger switch.

A key button and a method of manufacturing the same are provided. The key button includes an upper surface, a side surface formed at a certain height along a border of the upper surface, and at least two worked surfaces formed to have a certain slope in a boundary portion between the side surface and the upper surface, wherein at least one first worked surface and at least one second worked surface are formed such that a shortest distance between the upper surface and the side surface differs from each other.

A button structure includes a button and a fixing portion; wherein the fixing portion is configured for fixing the button, the fixing portion includes a first latching portion and a second latching portion, and the first latching portion includes a first latching opening, and the second latching portion includes a second latching opening, and the first latching opening has an opening direction substantially perpendicular to an opening direction of the second latching opening, and the first latching opening and the second latching opening are engaged with the button. An electronic device is also provided. The electronic device includes a housing and the button structure, the button structure is received in the housing.

An electronic device controller assembly for ergonomic dual-handed control of the electronic device includes a housing. At least one circuit board is positioned in the housing. The at least one circuit board is configured to selectively and operationally couple to the electronic device. Each of a pair of sticks is pivotally coupled to and extends between the upper face of the housing and a bottom of a respective plate. Each plate is configured to position a respective hand of a user. A plurality of first buttons is coupled to the plates. The sticks and the first buttons are operationally coupled to the at least one circuit board. Each first button is configured to be depressed to selectively control a respective function of the electronic device. Each plate is positioned to compel an associated stick to pivot relative to the housing to signal a directional movement.

A handheld transmitter includes a housing having at least one key a key cover and a switch that can be actuated by the key. The switch is located inside the housing, wherein a flexible membrane is arranged between the key cover and switch. The membrane includes a reinforcement in a contact area between the key cover and switch.

An electronic device, according to one embodiment of the present invention, can comprise: a housing which has an opening part penetrating through the inside and the outside of the electronic device and forms the outside of the electronic device; a key button inserted into the opening part so as to be movable; a sealing member which is disposed such that the sealing member slidably contacts the outer surface of the key button, and prevents communication between the inside and the outside of the electronic device through the inner surface of the opening part and the outer surface of the key button; and a push switch accommodated in the housing and pressed by an inward movement of the key button. Various other embodiments are possible.