A button for a drug delivery device with a reduced operating loudness includes a plate-like button body forming a touch surface, wherein the plate-like button body is coupled by an axial supporting member to a noise-generating interface of the drug delivery device and movable into a longitudinal direction of the drug delivery device, wherein the plate-like button body includes a material composite with at least one first component consisting of a first material and at least one second component consisting of a second material different from the first material, wherein the at least one first component and the at least one second component are coupled via at least one coupling plane that is at least section wise slanted or perpendicular to the longitudinal direction. Further, the disclosure describes a button assembly for a drug delivery device which is shock resistant.

A key structure is stacked on a display panel. The key structure includes a trigger plate, a frame, at least an elastic triggering member, and at least a key. The trigger plate is formed with at least a hollow area for the display panel to partially expose and a solid area. The frame is disposed on the trigger plate and is formed with at least an opening opposite the hollow area. The key includes a key cap and a scissor member connected to the key cap, wherein the key cap has a cap body which is located in the opening and helps directly observing the hollow area and at least two skirts which extend from sides of the cap body and are covered by the frame.

Techniques and devices provide backlighting for keys of a keyboard or keypad.

A keyswitch device includes a base plate, a hook, a scissors-like linkage mechanism, a keycap, and a blocking structure. The hook is located on the base plate. The scissors-like linkage mechanism is located on the base plate and includes a connection member. The connection member includes a shaft rotatably engaged with the hook. The keycap is engaged with the scissors-like linkage mechanism and configured to move relative to the base plate with the guidance of the scissors-like linkage mechanism. The blocking structure is located on the base plate. When the keycap is located at a highest position relative to the base plate, the blocking structure and a part of the connection member abut against each other.

A keyboard structure and assembling method thereof are provided. The keyboard structure includes a baseplate, a keycap and a frame having a hook body. The keycap can be inserted into the frame and restricted by the hook body, so that the range of movement of the keycap is restricted. The keycap cannot be separated from the frame so that the coupling of the frame and the baseplate is not interfered by the keycap. Thus, the present invention can effectively simplify the assembling process of the keyboard.

A cap structure is combined with a lifting mechanism to be movable between a pressed position and a non-pressed position. The cap structure includes a first circuit, a second circuit, a flexible circuit board and a cap having a top surface, a bottom surface and an engaging structure. The engaging structure protrudes from the bottom surface for engaging with the lifting mechanism. The first circuit is laid out on the top surface for connecting to a sensing device or a display device attached on the top surface. The second circuit is laid out on the bottom surface and avoids the engaging structure. The second circuit passes through the cap to be connected to the first circuit. The flexible circuit board is connected to the second circuit for performing signal transmission of the sensing device or the display device via the first and second circuits.

A key structure of an electronic device includes a connecting portion and a key portion. The connecting portion includes two electrode plates cooperatively defining an accommodating space. The key portion, when pressed, is moved toward the accommodating space and partially received within the accommodating space, thereby changing a capacitance between the two electrode plates. The key portion partially protrudes from the housing.

An electronic device having a button assembly fitted with an enclosure of the electronic device is disclosed. The button assembly may include a button connected to a first protrusion and a second protrusion, both of which extend through a first through hole and a second through hole, respectively, of the enclosure. The electronic device may include a liquid-resistant electronic device. The button assembly may include sealing elements fitted on the protrusions to plug, or seal, the through holes. The button assembly may include a clip that secures the button assembly with the enclosure. The button assembly may include a bar secured with the first protrusion and the second protrusion. When an off-center force is applied to an end of the button, the bar is designed to distribute the force so that the other end of the button is actuated and the button remains generally parallel with respect to the enclosure.

A linkage assembly is provided for guiding movement of a key cap relative to a support board between a normal position and a pressed position. The linkage assembly includes a left modular linking member, a right modular linking member, and a pair of synchronizing units for synchronize movement of the left and right modular linking members. Each of the synchronizing units has a first pin, a second pin, a first hole, and a second hole. In the normal position, the first and second pins are in substantially full frictional engagement within the first and second holes, respectively. In the pressed position, the first and second pins are in loose frictional engagement within the first and second holes, respectively.

A key structure includes a base plate, a structural plate, a sound generation assembly and a keycap. The structural plate is installed on the base plate. The sound generation assembly includes a shaft body and a cantilever element. The cantilever element is protruded from a side of the shaft body. The structural plate is covered by the keycap. The keycap includes a first protrusion post and a second protrusion post. A first space and a second space are formed between the first protrusion post and the second protrusion post. The first space and the second space are not aligned with each other. The cantilever element is movable within the first space and the second space. Consequently, the feedback of a click sound is generated.