Keyboard device and electronic apparatus
A keyboard device includes a light source and a plurality of keycaps that is capable of emitting light with light emitted from the light source. The keyboard device includes a base plate configured to support the keycaps on a top surface side and a membrane sheet that has a top contact sheet, a bottom contact sheet, and a spacer sheet interposed between the top contact sheet and the bottom contact sheet, and that is laminated on a top surface of the base plate, in which the top contact sheet, the bottom contact sheet, and the spacer sheet have light transmittance, a light reflecting layer is provided on a top surface of the top contact sheet, and the membrane sheet has a part of at least one sheet of the top contact sheet, the bottom contact sheet, and the spacer sheet disposed below the keycaps.
1 . A keyboard device comprising:
a light source and a plurality of keycaps that is capable of emitting light emitted from the light source;
a base plate configured to support the keycaps on a top surface side; and
a membrane sheet that has a top contact sheet, a bottom contact sheet, and a spacer sheet interposed between the top contact sheet and the bottom contact sheet, and that is laminated on a top surface of the base plate,
wherein the top contact sheet, the bottom contact sheet, and the spacer sheet have light transmittance,
a light reflecting layer is provided on a top surface of the top contact sheet, and
the membrane sheet has a part of at least one sheet of the top contact sheet, the bottom contact sheet, and the spacer sheet disposed below the keycaps, and a light diffusion pattern on a surface of the part disposed below the keycaps.
2 . The keyboard device according to claim 1 , further comprising:
a hole portion configured to open to a bottom surface of the membrane sheet and penetrate the base plate,
wherein the light source is inserted into the hole portion, and
the light source has a lateral light emission surface facing an inner wall surface of the hole portion formed on the membrane sheet.
3 . The keyboard device according to claim 2 ,
wherein the hole portion penetrates the base plate, the bottom contact sheet, and the spacer sheet, and
an inner side of the hole portion is closed by the top contact sheet.
4 . The keyboard device according to claim 3 ,
wherein the light emission surface faces end surfaces of the bottom contact sheet and the spacer sheet forming the inner wall surface of the hole portion.
5 . The keyboard device according to claim 3 ,
wherein a thickness of the bottom contact sheet is greater than a thickness of the top contact sheet.
6 . The keyboard device according to claim 3 ,
wherein the top contact sheet has a bulging portion in which a part forming an inner surface of the hole portion bulges upward,
a top portion of the light source is inserted into the bulging portion, and
in a case where a vertical direction of the keyboard device is used as a reference, a top surface of the light source is located at a height position equal to or higher than the top surface of the top contact sheet excluding the bulging portion.
7 . The keyboard device according to claim 3 ,
wherein the membrane sheet has a bent portion that is formed by bending a part of the spacer sheet and the bottom contact sheet forming the inner wall surface of the hole portion downward to form a gap between the spacer sheet and the top contact sheet, and
the light emission surface of the light source faces the bent portion.
8 . The keyboard device according to claim 2 , further comprising:
a flexible printed circuit on which the light source is mounted,
wherein the flexible printed circuit is laminated on a bottom surface of the base plate.
9 . The keyboard device according to claim 2 ,
wherein in the membrane sheet, the top contact sheet, the bottom contact sheet, and the spacer sheet are disposed below the keycaps, and
light diffusion patterns are provided on surfaces of the top contact sheet, the bottom contact sheet, and the spacer sheet disposed below the keycaps, respectively.
10 . The keyboard device according to claim 1 , further comprising:
a light guide member that is laminated on a bottom surface side of the base plate,
wherein the membrane sheet has a through-hole below the keycaps for passing through light guided by the light guide member to the keycaps, and
the membrane sheet has an extending portion in which at least one sheet of the top contact sheet, the bottom contact sheet, and the spacer sheet extends inside the through-hole and the light diffusion pattern is provided on the extending portion.
11 . The keyboard device according to claim 10 , further comprising:
a hole portion that is configured to penetrate the light guide member and the base plate and that has an inner surface formed of the membrane sheet,
wherein the light source is inserted into the hole portion.
12 . The keyboard device according to claim 11 ,
wherein a plurality of the light sources is provided, and
a part of the plurality of light sources is inserted into the hole portion and has an upward light emission surface facing the inner surface of the hole portion.
13 . An electronic apparatus comprising:
a chassis; and
a keyboard device including a light source and a plurality of keycaps that is capable of emitting light with light emitted from the light source and facing a top surface of the chassis,
wherein the keyboard device includes
a base plate configured to support the keycaps on a top surface side, and
a membrane sheet that has a top contact sheet, a bottom contact sheet, and a spacer sheet interposed between the top contact sheet and the bottom contact sheet, and that is laminated on a top surface of the base plate,
the top contact sheet, the bottom contact sheet, and the spacer sheet have light transmittance,
a light reflecting layer is provided on a top surface of the top contact sheet, and
the membrane sheet has a part of at least one sheet of the top contact sheet, the bottom contact sheet, and the spacer sheet disposed below the keycaps, and a light diffusion pattern on a surface of the part disposed below the keycaps.
14 . The electronic apparatus according to claim 13 ,
wherein the keyboard device includes a hole portion configured to open to a bottom surface of the membrane sheet and penetrate the base plate,
the light source is inserted into the hole portion, and
the light source has a lateral light emission surface facing an inner wall surface of the hole portion formed on the membrane sheet.
15 . The electronic apparatus according to claim 14 ,
wherein in the membrane sheet, the top contact sheet, the bottom contact sheet, and the spacer sheet are disposed below the keycaps, and
the light diffusion patterns are provided on surfaces of the top contact sheet, the bottom contact sheet, and the spacer sheet disposed below the keycaps, respectively.
16 . The electronic apparatus according to claim 13 ,
wherein a light guide member that is laminated on a bottom surface side of the base plate is provided,
the membrane sheet has a through-hole below the keycaps for passing through light guided by the light guide member to the keycaps, and
the membrane sheet has an extending portion in which at least one sheet of the top contact sheet, the bottom contact sheet, and the spacer sheet extends inside the through-hole and the light diffusion pattern is provided on the extending portion.
17 . The electronic apparatus according to claim 16 ,
wherein a hole portion that is configured to penetrate the light guide member and the base plate and that has an inner surface formed of the membrane sheet is provided, and
the light source is inserted into the hole portion.