A keyboard device includes a key, a base plate, a membrane circuit board and a buffering part. The membrane circuit board is disposed on the base plate. The key includes a keycap and a stabilizer bar. The stabilizer bar is connected between the keycap and the base plate. The stabilizer bar includes a main bar part, a first linking part and a first insertion part. The first linking part is connected between the main bar part and the first insertion part. The buffering part is disposed on the base plate or the membrane circuit board and located under the first linking part. While a keycap is moved downwardly relative to the base plate, the linking part of the stabilizer bar is contacted with the buffering part. The contact point between the linking part of the stabilizer bar and the buffering part is used as a fulcrum.

A keyboard device includes a key, a base plate, a membrane circuit board and a buffering part. The membrane circuit board is disposed on the base plate. The key includes a keycap and a stabilizer bar. The stabilizer bar is connected between the keycap and the base plate. The stabilizer bar includes a main bar part, a first linking part and a first insertion part. The first linking part is connected between the main bar part and the first insertion part. The buffering part is disposed on the base plate or the membrane circuit board and located under the first linking part. While a keycap is moved downwardly relative to the base plate, the linking part of the stabilizer bar is contacted with the buffering part. The contact point between the linking part of the stabilizer bar and the buffering part is used as a fulcrum.

A steering wheel horn assembly having two sections with an annular electrical circuit board member interposed and disposed between the sections and electrically coupled to a power source, an electrical ground, and an electrical horn. Also disposed within the two sections is an annular button membrane with a plurality of deformably resilient horn buttons, wherein each of the plurality of deformably resilient horn buttons have a terminal front surface and a rear surface opposing the terminal front surface and that is disposed adjacent to the annular electrical circuit board member, have a static position along a button translation path projecting through one of the plurality enclosed apertures, and have a depressed position with the rear surface directly coupled to the annular electrical circuit board member and electrically completing a circuit on the annular electrical circuit board member and causing the electrical horn to generate the audible sound.

A steering wheel horn assembly having two sections with an annular electrical circuit board member interposed and disposed between the sections and electrically coupled to a power source, an electrical ground, and an electrical horn. Also disposed within the two sections is an annular button membrane with a plurality of deformably resilient horn buttons, wherein each of the plurality of deformably resilient horn buttons have a terminal front surface and a rear surface opposing the terminal front surface and that is disposed adjacent to the annular electrical circuit board member, have a static position along a button translation path projecting through one of the plurality enclosed apertures, and have a depressed position with the rear surface directly coupled to the annular electrical circuit board member and electrically completing a circuit on the annular electrical circuit board member and causing the electrical horn to generate the audible sound.

A membrane digital analog switch includes an input button surface adapted to receive an input pressure from a user, and a digital switch positioned below the input button surface to generate a digital switch activation signal when the received pressure on the input button surface is greater than or equal to a specified digital pressure threshold. The membrane digital analog switch also includes an analog switch adapted to generate an analog switch activation signal when the received pressure on the input button surface is greater than or equal to a specified analog pressure threshold. The specified analog pressure threshold is greater than the specified digital pressure threshold, the digital switch activation signal is a binary digital signal, and the analog switch activation signal is variable and corresponds to an analog sensed value of the received pressure on the input button surface.

A steering wheel horn assembly having two sections with an annular electrical circuit board member interposed and disposed between the sections and electrically coupled to a power source, an electrical ground, and an electrical horn. Also disposed within the two sections is an annular button membrane with a plurality of deformably resilient horn buttons, wherein each of the plurality of deformably resilient horn buttons have a terminal front surface and a rear surface opposing the terminal front surface and that is disposed adjacent to the annular electrical circuit board member, have a static position along a button translation path projecting through one of the plurality enclosed apertures, and have a depressed position with the rear surface directly coupled to the annular electrical circuit board member and electrically completing a circuit on the annular electrical circuit board member and causing the electrical horn to generate the audible sound.

A steering wheel horn assembly having two sections with an annular electrical circuit board member interposed and disposed between the sections and electrically coupled to a power source, an electrical ground, and an electrical horn. Also disposed within the two sections is an annular button membrane with a plurality of deformably resilient horn buttons, wherein each of the plurality of deformably resilient horn buttons have a terminal front surface and a rear surface opposing the terminal front surface and that is disposed adjacent to the annular electrical circuit board member, have a static position along a button translation path projecting through one of the plurality enclosed apertures, and have a depressed position with the rear surface directly coupled to the annular electrical circuit board member and electrically completing a circuit on the annular electrical circuit board member and causing the electrical horn to generate the audible sound.

A switch unit includes a wiring board, a spacer, a movable contact element, a pressing element, and a protective sheet. A first stationary contact element and a second stationary contact element having rectangular shapes are provided on an upper surface of the wiring board. A contact section includes the movable contact element, the first stationary contact element, and the second stationary contact element. The movable contact element is mounted on a portion of the upper surface of the wiring board that is exposed from an inside of an opening of the spacer so that an outer edge of the movable contacts the second stationary contact element. The first stationary contact element continuously extends from a region of the wiring board facing a movable contact portion of the movable contact element to a region of the wiring board outside a region of the wiring board onto which the movable contact element is projected.

A power supply includes a main body having a coupling face and a handlebar. The coupling face includes a first end and a second end forming a power socket. The handlebar includes a first beam coupled to the first end and a second beam. The first beam extends a tab outwardly. The handlebar defines a window configured to expose the power socket. The handlebar is transitionable between: (i) a first configuration in which the second beam couples the second end, the window corresponds and exposes the power socket, the tab extends toward a first direction, and (ii) a second configuration in which the second beam is remote from the second end, the window is remote from the power socket, and the tab extends toward a second direction different from the first direction. A method for removing the power supply from a case of an electronic device is also provided.

Systems and methods for a hack-proof security keyboard are described. In some embodiments, a keyboard module may include a first circuit configured to detect activation of a plurality of keys and a second circuit configured to detect activation of a subset of the plurality of keys, where the second circuit overlies the first circuit. In other embodiments, a method may include detecting an electrical signal received from a secondary membrane of a keyboard, where the keyboard includes a primary membrane configured to detect individual activation of any of a plurality of keys, and where the secondary membrane is configured to output the electrical signal in response to concurrent activation of a subset of the plurality of keys. The method may also include performing a selected action in response to the detection.