5 results about "Key switch" patented technology

A key switch arrangement is able to accomplish the compatibility with a normal keyboard in respect of profile without increasing the height of the keyboard and reduce the cost without adding new members for a light source. The key switch arrangement includes a key-top having an optically transparent key-top having a cutout letter part formed thereon, an optically transparent membrane sheet having a contact, an optically transparent plate member arranged under the membrane sheet, and a light source arranged in the membrane sheet. The light source emits light to pass the plate member and the membrane sheet to illuminate the cutout letter part on the key-top.

A light emitting sheet module includes a light guiding sheet to cover a plurality of key switches, at least one LED disposed on at least one end portion of the light guiding sheet, and a circuit board disposed on the one end portion of the light guiding sheet on which the LED is disposed. When the light emitting sheet module is, mounted on a switch board, it is capable of adaptation to key switches in a wide variety of forms and to illuminate the key switches with light emission of high brightness.

The invention relates to a touch-control-based one-key switching method and device for transparency and non-transparency of an intelligent vehicle window. The method comprises the following steps thata touch screen is clicked, a first signal is generated and transmitted to a main board, and when a touch drive board on the touch screen judges that the clicking position is the position where a one-key switching button is located, the content of the first signal is a one-key transparent signal; after receiving the first signal, the main board identifies the content of the first signal, and whenthe main board identifies that the content of the first signal is a one-key transparent signal, a corresponding second signal is generated and sent to the screen driving board; and after receiving thesecond signal, the screen driving board controls the display screen to be in a fully transparent state according to the second signal. The one-key switching button is arranged in the display area ofthe car window, when passengers need to appreciate scenery outside the car window, the one-key switching button is clicked, the display area of the car window is in a transparent state, and it is guaranteed that the passengers can clearly appreciate the scenery outside the car window on the premise that the car window is not powered off.

The invention relates to the technical field of power supply protection circuits, in particular to a control system of a battery protection circuit, which is characterized in that the input end of a battery protection unit is connected with a battery pack; an electronic switch unit is respectively connected with the battery pack and the battery protection unit and is used for cutting off the battery pack when the battery pack works abnormally; the input end of the control unit is connected with the power supply unit, and the output end of the control unit is connected with the electronic switch unit for controlling start and stop of the electronic switch unit; the control unit specifically comprises a key switch, a control circuit and a micro-control chip, and the micro-control chip controls the electronic switch unit to be started and stopped according to the pressing state of the key switch after being powered on. The advantages are that the starting and stopping of the battery protection circuit are controlled so as to reduce static power consumption of an electronic product and prolong service time of a battery; in addition, the control system has a reset function, so that the system can be forcibly reset through the key switch when the system crashes or breaks down.

The invention provides a key type stop valve good in airtightness. The key type stop valve good in airtightness comprises a valve body, a valve deck, a valve disk, a valve clack, a valve rod and a keyswitch, wherein the valve disk is located between the valve deck and the valve body; the key switch is fixed to the top of the valve deck through a reset tenon, and the lower end of the key switch isconnected with the top end of the valve rod; the lower end of the valve rod is connected with the valve clack located in the valve body; the valve body is a transparent body, a pressure relief hole is formed in the valve body, and a pressure relief block is located in the pressure relief hole; and a sealing layer is arranged on the valve body and located on the contact surface between the valve body and the valve clack. The key type stop valve good in airtightness has the beneficial effects that the sealing layer is additionally arranged on the contact surface between the valve body and the valve clack so that friction between the lower portion of the valve body and the valve clack can be reduced, abrasion is reduced, and meanwhile, the airtightness between the valve body and the valve clack is improved; and the pressure relief hole is formed in a valve seat, the pressure relief block is arranged in the pressure relief hole and moves backwards when the pressure in a pipeline is too high, then the pressure relief hole can be opened, and media are discharged to the lower portion of the pipeline through the pressure relief hole.