1. A luminescent keyswitch module comprising:
a base plate having a through hole;
a keyswitch disposed on the base plate;
a light guide plate disposed under the base plate and having an accommodating space, wherein the accommodating space is communicated with the through hole;
a light source passing through the through hole and accommodated in the accommodating space, the light source having a first light exit surface and emitting light from the first light exit surface, and the light leaving the first light exit surface having a first divergence angle;
a diffusion structure accommodated in the accommodating space and located between the light source and the light guide plate, the diffusion structure having a light entrance surface and a second light exit surface, the light leaving the first light exit surface then entering the diffusion structure from the light entrance surface and leaving the diffusion structure from the second light exit surface, wherein the light leaving the second light exit surface has a second divergence angle, and the second divergence angle is larger than the first divergence angle; and
a reflector disposed under the light guide plate, so as to reflect the light to sequentially pass through the light guide plate and the base plate to the keyswitch.
2. The luminescent keyswitch module of claim 1, wherein the shape of the diffusion structure substantially matches the accommodating space, and the light source is sleevedly disposed in the diffusion structure.
3. The luminescent keyswitch module of claim 1, wherein the radius of curvature of the second light exit surface is smaller than the radius of curvature of the light entrance surface.
4. The luminescent keyswitch module of claim 3, wherein the light entrance surface is a planar surface, and the second light exit surface is a curved surface.
5. The luminescent keyswitch module of claim 1, wherein the second divergence angle is smaller than or equal to 160 degrees.
6. The luminescent keyswitch module of claim 1, wherein the reflector is flatly attached to the bottom of the light guide plate and mounted to the bottom of the light source.
7. The luminescent keyswitch module of claim 1, further comprising a circuit board disposed on the base plate and covering the through hole for electrically connecting the light source.
8. The luminescent keyswitch module of claim 7, wherein the circuit board is a flexible printed circuit board.
9. The luminescent keyswitch module of claim 1, further comprising a circuit board disposed on the base plate and covering the through hole for generating a trigger signal according to a trigger action of the keyswitch and supplying power to the light source.
10. The luminescent keyswitch module of claim 9, wherein the circuit board is a membrane circuit board.
11. A keyboard comprising:
a base plate having a through hole;
a plurality of keyswitches disposed on the base plate;
a light guide plate disposed under the base plate and having an accommodating space, wherein the accommodating space is communicated with the through hole;
a light source passing through the through hole and accommodated in the accommodating space, the light source having a first light exit surface and emitting light from the first light exit surface, and the light leaving the first light exit surface having a first divergence angle;
a diffusion structure accommodated in the accommodating space and located between the light source and the light guide plate, the diffusion structure having a light entrance surface and a second light exit surface, the light leaving the first light exit surface then entering the diffusion structure from the light entrance surface and leaving the diffusion structure from the second light exit surface, wherein the light leaving the second light exit surface has a second divergence angle, and the second divergence angle is larger than the first divergence angle; and
a reflector disposed under the light guide plate, so as to reflect the light to sequentially pass through the light guide plate and the base plate to the keyswitches.
12. The keyboard of claim 11, wherein the shape of the diffusion structure substantially matches the accommodating space, and the light source is sleevedly disposed in the diffusion structure.
13. The keyboard of claim 11, wherein the radius of curvature of the second light exit surface is smaller than the radius of curvature of the light entrance surface.
14. The keyboard of claim 13, wherein the light entrance surface is a planar surface, and the second light exit surface is a curved surface.
15. The keyboard of claim 11, wherein the second divergence angle is smaller than or equal to 160 degrees.
16. The keyboard of claim 11, further comprising a circuit board disposed on the base plate and covering the through hole for electrically connecting the light source.
17. The keyboard of claim 16, wherein the circuit board is a flexible printed circuit board.
18. The keyboard of claim 11, further comprising a circuit board disposed on the base plate and covering the through hole for electrically connecting the light source.
19. The keyboard of claim 18, wherein the circuit board is a flexible printed circuit board.
20. The keyboard of claim 11, wherein the base plate has at least one extension portion outside of the peripheral edge of the light guide plate, and the reflector is flatly attached to the light guide plate and mounted to the extension portion.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A dampening water spraying device for a dampening arrangement for spraying dampening water from a nozzle onto a printing plate surface or onto a peripheral surface of a roller leading to the printing plate, the spraying device comprising:
a nozzle for spraying dampening water;
a nozzle holder including, an end surface connectable to said nozzle, and an outer peripheral portion provided with at least one groove; and
a nozzle fixing member including, an opening portion adapted to expose at least a spout of said nozzle, and an inner peripheral portion provided with an adjustable nozzle attachmentdetachment moving portion opposed to and engageable with said groove, said nozzle fixing member being adapted to be fastened to said nozzle holder while clamping said nozzle between said nozzle fixing member and said nozzle holder;
wherein said nozzle fixing member includes an outer peripheral portion provided with a handhold portion for making it possible to manually rotate said nozzle fixing member; and
wherein said nozzle fixing member is capable of fixing said nozzle to said nozzle holder by manually rotating said nozzle fixing member in one direction relative to said nozzle holder, and is capable of detaching said nozzle from said nozzle holder by manually rotating said nozzle fixing member in the other direction relative to said nozzle holder.
2. A dampening water spraying device for a dampening arrangement for spraying dampening water from a nozzle onto a printing plate surface or onto a peripheral surface of a roller leading to the printing plate, the spraying device comprising:
a nozzle for spraying dampening water;
a nozzle holder including, an end surface connectable to said nozzle, and an outer peripheral portion having at least one adjustable nozzle attachmentdetachment moving portion; and
a nozzle fixing member including, an opening portion adapted to expose at least a spout of said nozzle, and an inner peripheral portion provided with a groove opposed to and engageable with said nozzle attachmentdetachment moving portion, said nozzle fixing member being adapted to be fastened to said nozzle holder while clamping said nozzle between said nozzle fixing member and said nozzle holder;
wherein said nozzle fixing member includes an outer peripheral portion provided with a handhold portion for making it possible to manually rotate said nozzle fixing member; and
wherein said nozzle fixing member is capable of fixing said nozzle to said nozzle holder by manually rotating said nozzle fixing member in one direction relative to said nozzle holder, and is capable of detaching said nozzle from said nozzle holder by manually rotating said nozzle fixing member in the other direction relative to said nozzle holder.
3. The dampening water spraying device of claim 1 or 2,
wherein said nozzle attachmentdetachment moving portion is a protruded body, and
wherein said groove to be engaged with said nozzle attachmentdetachment moving portion is a helical groove shorter than the circumference of a peripheral portion to be provided with said helical groove.
4. The dampening water spraying device of claim 1 or 2,
wherein said nozzle attachmentdetachment moving portion and said groove to be engaged with said nozzle attachmentdetachment moving portion are threaded members, respectively.
5. The dampening water spraying device of claim 1 or 2,
wherein said opening portion of said nozzle fixing member has a shape formed to enable said nozzle to pass through said opening portion when said opening portion and said nozzle are placed in a predetermined phase relationship.
6. The dampening water spraying device of claim 1 or 2,
wherein said nozzle is incorporated in said nozzle fixing member in a manner to be allowed to move relative to said nozzle fixing member, and to be prevented from separating from said nozzle fixing member.
7. The dampening water spraying device of claim 1 or 2,
wherein said outer peripheral portion of said nozzle holder comprises a cylindrical member provided integrally with said nozzle holder.
8. The dampening water spraying device of claim 1 or 2,
wherein said inner peripheral portion of said nozzle fixing member comprises a cylindrical member provided integrally with said nozzle fixing member.
9. The dampening water spraying device of claim 1 or 2,
wherein said handhold portion comprises at least one projected portion projected from said outer peripheral portion of said nozzle fixing member.
10. A dampening water spraying device for a dampening arrangement for spraying dampening water from a nozzle onto a printing plate surface or onto a peripheral surface of a roller leading to the printing plate, the spraying device comprising:
a nozzle for spraying dampening water;
a nozzle holder including, an end surface connectable to said nozzle, and an outer peripheral portion provided with at least one groove;
a nozzle fixing member including, an opening portion adapted to expose at least a spout of said nozzle, and an inner peripheral portion provided with a nozzle attachmentdetachment moving portion opposed to and engageable with said groove, said nozzle fixing member being adapted to be fastened to said nozzle holder while clamping said nozzle between said nozzle fixing member and said nozzle holder; and
positioning means capable of fixingly restricting an attached relationship of said nozzle relative to said nozzle holder;
wherein said nozzle fixing member includes an outer peripheral portion provided with a handhold portion for making it possible to manually rotate said nozzle fixing member; and
wherein said nozzle fixing member is capable of fixing said nozzle to said nozzle holder by manually rotating said nozzle fixing member in one direction relative to said nozzle holder, and is capable of detaching said nozzle from said nozzle holder by manually rotating said nozzle fixing member in the other direction relative to said nozzle holder.
11. A dampening water spraying device for a dampening arrangement for spraying dampening water from a nozzle onto a printing plate surface or onto a peripheral surface of a roller leading to the printing plate, the spraying device comprising:
a nozzle for spraying dampening water;
a nozzle holder including, an end surface connectable to said nozzle, and an outer peripheral portion having at least one nozzle attachmentdetachment moving portion;
a nozzle fixing member including, an opening portion adapted to expose at least a spout of said nozzle, and an inner peripheral portion provided with a groove opposed to and engageable with said nozzle attachmentdetachment moving portion, said nozzle fixing member being adapted to be fastened to said nozzle holder while clamping said nozzle between said nozzle fixing member and said nozzle holder; and
positioning means capable of fixingly restricting an attached relationship of said nozzle relative to said nozzle holder;
wherein said nozzle fixing member includes an outer peripheral portion provided with a handhold portion for making it possible to manually rotate said nozzle fixing member; and
wherein said nozzle fixing member is capable of fixing said nozzle to said nozzle holder by manually rotating said nozzle fixing member in one direction relative to said nozzle holder, and is capable of detaching said nozzle from said nozzle holder by manually rotating said nozzle fixing member in the other direction relative to said nozzle holder.