A membrane circuit board includes a first film substrate, a second film substrate, an insulating spacer substrate and a waterproof structure. The first circuit layer is installed on the first film substrate. A second circuit layer is installed on the second film substrate. The insulating spacer substrate arranged between the first film substrate and the second film substrate. The first circuit layer is arranged between the first film substrate and the insulating spacer substrate. The second circuit layer is arranged between the second film substrate and the insulating spacer substrate. The waterproof structure includes a first welding layer and a second welding layer. The first welding layer is arranged between the first film substrate and the insulating spacer substrate. The second welding layer is arranged between the second film substrate and the insulating spacer substrate.

Embodiments are directed to a sensing membrane that is coupled with electrical terminals of a key switch and a light source. This may allow the membrane to be both configured to transmit a signal in response to actuation of keyboard key cap and illuminate an illuminable symbol of key cap. In one aspect, the membrane includes a set of deformable layers separated by a spacer layer. Terminals of the key switch are connected to distinct ones of the set of deformable layers and positioned within a cavity defined by the spacer layer. A light assembly may be positioned along and configured to move with one of the set of deformable layers. Depression of a key cap toward the set of deformable layers causes the set of terminals to move and initiate a switch event.

Embodiments are directed to a sensing membrane that is coupled with electrical terminals of a key switch and a light source. This may allow the membrane to be both configured to transmit a signal in response to actuation of keyboard key cap and illuminate an illuminable symbol of key cap. In one aspect, the membrane includes a set of deformable layers separated by a spacer layer. Terminals of the key switch are connected to distinct ones of the set of deformable layers and positioned within a cavity defined by the spacer layer. A light assembly may be positioned along and configured to move with one of the set of deformable layers. Depression of a key cap toward the set of deformable layers causes the set of terminals to move and initiate a switch event.

The disclosure provides a keyboard includes a bottom plate, a key unit and a shielding layer. The bottom plate includes a body part and a through hole. The key unit is disposed on the body part. The shielding layer covers a portion of the bottom plate and comprising a main part disposed on the body part and an extension part extending from the main part toward the through hole, wherein the extension part has a hole with a size larger than or substantially equal to a size of the through hole.

The disclosure provides a keyboard includes a bottom plate, a key unit and a shielding layer. The bottom plate includes a body part and a through hole. The key unit is disposed on the body part. The shielding layer covers a portion of the bottom plate and comprising a main part disposed on the body part and an extension part extending from the main part toward the through hole, wherein the extension part has a hole with a size larger than or substantially equal to a size of the through hole.

A key structure includes a base plate, a key cap, a supporting member, a link member, and a buffer member. The base plate includes a body portion and a protrusion portion protruding upward from the body portion. The body portion has an accommodating hole, the accommodating hole corresponds to the protrusion portion, and the protrusion portion has an opening. The key cap is disposed above the base plate. The supporting member is disposed between the key cap and the base plate. The link member includes a main body portion and an end portion. The main body portion is pivotally connected to the key cap, and the end portion is disposed at the opening of the protrusion portion. The buffer member is located below the end portion, and the end portion leans against the buffer member.

A key structure includes a base plate, a key cap, a supporting member, a link member, and a buffer member. The base plate includes a body portion and a protrusion portion protruding upward from the body portion. The body portion has an accommodating hole, the accommodating hole corresponds to the protrusion portion, and the protrusion portion has an opening. The key cap is disposed above the base plate. The supporting member is disposed between the key cap and the base plate. The link member includes a main body portion and an end portion. The main body portion is pivotally connected to the key cap, and the end portion is disposed at the opening of the protrusion portion. The buffer member is located below the end portion, and the end portion leans against the buffer member.

A keyboard device with a protecting function and a manufacturing method of the keyboard device are provided. Firstly, a mold is provided. Then, a frame material is placed into the mold to form a frame body, and a film material is placed into the mold to form a protective film. Consequently, the protective film is fixed on the frame body. After the mold is removed, a keyboard module is assembled with the frame body. Consequently, the keyboard device is manufactured. The protective film includes a sheet-like portion, plural connection portions and plural covering portions. The frame body includes plural spacer structures and plural perforations. The sheet-like portion is fixed on the plural spacer structures. The keyboard module includes a base plate and plural keys. The keycap is penetrated through the corresponding perforation and contacted with the corresponding covering portion.

A keyboard device with a protecting function and a manufacturing method of the keyboard device are provided. Firstly, a mold is provided. Then, a frame material is placed into the mold to form a frame body, and a film material is placed into the mold to form a protective film. Consequently, the protective film is fixed on the frame body. After the mold is removed, a keyboard module is assembled with the frame body. Consequently, the keyboard device is manufactured. The protective film includes a sheet-like portion, plural connection portions and plural covering portions. The frame body includes plural spacer structures and plural perforations. The sheet-like portion is fixed on the plural spacer structures. The keyboard module includes a base plate and plural keys. The keycap is penetrated through the corresponding perforation and contacted with the corresponding covering portion.

A membrane circuit board includes a first film substrate, a second film substrate, an insulating spacer substrate and a waterproof structure. The first circuit layer is installed on the first film substrate. A second circuit layer is installed on the second film substrate. The insulating spacer substrate arranged between the first film substrate and the second film substrate. The first circuit layer is arranged between the first film substrate and the insulating spacer substrate. The second circuit layer is arranged between the second film substrate and the insulating spacer substrate. The waterproof structure includes a first welding layer and a second welding layer. The first welding layer is arranged between the first film substrate and the insulating spacer substrate. The second welding layer is arranged between the second film substrate and the insulating spacer substrate.