TWM536330U - Light guide structure for light-emitting keyboard - Google Patents

Description

Light guiding structure of illuminated keyboard

The present invention relates to a light guiding structure, and more particularly to a light guiding structure of an illuminated keyboard.

The keyboard is an indispensable peripheral product for computer use. Each light-transmissive keycap of the keyboard is marked with a symbol for identifying the function of each light-transmitting keycap. When the keyboard is operated in a dimly lit environment with weak light intensity, if the symbol of each transparent keycap on the keyboard cannot be clearly identified, it will cause difficulty in operating the keyboard. Therefore, no one has designed an illuminated keyboard. The current illuminated keyboard includes a light-transmitting keycap, a keyboard bottom plate, and a light source from top to bottom.

The existing illuminating keyboard is mainly used for soldering a plurality of illuminating sources such as a light emitting diode (LED) on a printed circuit board, and then bonding the elastic body to the printed circuit board (PCB), and then entering the soldering furnace. . However, since the elastomer material itself cannot withstand a high temperature exceeding 200 ° C during the soldering and solidification process, it is easy to be damaged due to the inability to withstand high temperatures. Furthermore, when the elastic body is adhered to the printed circuit board, the blade must be glued to the printed circuit board, but since the light-emitting diode is soldered to the printed circuit board, the blade is easily touched when the glue is brushed. The light-emitting diode causes damage to the light-emitting diode, thereby affecting the service life of the illuminated keyboard.

In view of this, the creator has in-depth discussion on the above issues. Through years of experience in R&D and manufacturing of related industries, he actively seeks solutions. After long-term research and development, he has successfully developed this creation to improve. The problem of custom creation.

One of the purposes of the present invention is to provide a light guiding structure of an illuminated keyboard that makes the light-emitting element less susceptible to damage and effectively improves the life of the illuminated keyboard.

To achieve the above object, the present invention provides a light guiding structure for an illuminated keyboard, comprising an insulating sheet, an elastic body and a printed circuit board. The insulating sheet defines a through hole. The elastic body is attached to one side of the insulating sheet and disposed opposite to the transparent hole. The elastic body includes a trigger portion and a conductive layer disposed at the end of the trigger portion. The printed circuit board is stacked on the other side of the insulating sheet. The printed circuit board is electrically coupled to a switch and a light emitting component adjacent to the switch.

The present invention also has the following effects: the light-emitting element is disposed adjacent to the switch, and the light-emitting element is disposed more toward the direction of the transparent hole, so that the light-emitting direction of the light-emitting element can be directly diverged in the direction of the transparent hole. Therefore, the light guiding structure of the present invention is simple, and the light guiding structure is not easily damaged by high temperature during the manufacturing process.

The detailed description and technical content of the present invention are described below with reference to the drawings, but the drawings are only for reference and explanation, and are not intended to limit the creation.

As shown in FIG. 1 to FIG. 3, the present invention provides a light guiding structure 100 for an illuminated keyboard, comprising an insulating sheet 110, an elastic body 130, and a printed circuit board (PCB). The insulating sheet 110 in this embodiment preferably includes, but is not limited to, a polyester film (Mylar; Mylar), a rubber sheet, a film, or other suitable insulating material. The insulating sheet 110 defines a through hole 120.

The elastic body 130 is attached to one side of the insulating sheet 110 and disposed opposite to the through hole 120. The material of the elastic body 130 can be, but not limited to, plastic or rubber, and includes a triggering portion 140 and a conductive layer 150 disposed at an end of the triggering portion 140. The conductive layer 150 preferably includes a plurality of conductive particles (not shown), and the conductive particles are metal, nano metal, metal alloy or a combination thereof, but are not limited thereto.

The printed circuit board 200 is electrically coupled to the other side of the insulating sheet 110. The printed circuit board 200 is electrically coupled to a switch 210 and a light emitting element 220 disposed adjacent to the switch 210. The conductive layer 150 of the triggering portion 140 is preferably disposed corresponding to the switch 210. When the elastic body 130 is pressed down, the conductive layer 150 at the end of the triggering portion 140 can trigger the switch 210 on the printed circuit board 200 to generate an electron. Signal.

The light emitting element 220 is disposed adjacent to the switch 210, and the light emitting element 220 includes, but is not limited to, a light emitting diode (LED). In this embodiment, the light-emitting element 220 is disposed in the transparent hole 120. Therefore, the light emitted by the light-emitting element 220 can be diverged from the direction of the transparent hole 120, and then the light passes through the elastic body 130 to reach the transparent keycap 180. (Figure 4), the light-emitting keycap of the illuminated keyboard is illuminated. In other embodiments, the light-emitting element 220 can also be electrically connected to the printed circuit board 200 and disposed outside the transparent hole 120. This portion is not limited. As shown in FIG. 4 , the elastic body 130 further includes an annular support portion 160 attached to the insulating sheet 110 and a recess 170 disposed opposite the trigger portion 140 . The trigger portion 140 is located in the middle of the annular support portion 160 . The annular support portion 160 and the trigger portion 140 are preferably integrally formed with the elastic body 130. The annular support portion 160 is disposed outside the transparent hole 120. The length of the trigger portion 140 is smaller than the height of the annular support portion 160. The annular support portion 160 is pressed and deformed to cause the conductive layer 150 of the trigger portion 140 to touch the switch 210 to output. The electronic signal.

In this embodiment, a light-transmitting keycap 180 assembled in the recess 170 and a connecting member 190 disposed between the transparent keycap 180 and the insulating sheet 110 are further included. As shown in FIG. 4, the light-transmitting keycap 180 further includes a positioning block 182 disposed opposite the recess 170 to enable the light-transmitting keycap 180 to be positioned on the elastic body 130 and to improve the stability of the device. The connecting member 190 is connected between the transparent keycap 180 and the bottom plate (or the printed circuit board 200), and is pivotally connected by the two links, thereby driving and guiding the transparent keycap 180 opposite to the bottom plate (or the printed circuit board) 200) Carry out the lifting action. In some embodiments, the connector 190 can also be replaced with other support structures having similar functions, such as a V-shaped, A-shaped or two-parallel link structure, which is not limited.

The related process steps of the present light guiding structure 100 are further described below. As shown in FIG. 1, an adhesive (not labeled) is applied between the elastic body 130 and the insulating sheet 110 to adhere the elastic body 130 to the insulating sheet 110. Then, the adhered elastic body 130 and the insulating sheet 110 are baked in a soldering furnace to firmly adhere the elastic body 130 to the insulating sheet 110. It is worth noting that since the temperature of the tin furnace is less than or equal to 150 ° C, the elastomer 130 is not damaged by overheating.

As shown in FIG. 2 and FIG. 3, the switch 210 and the light-emitting element 220 are preferably placed in a predetermined circuit layout of the printed circuit board 200, and baked by the tin furnace to complete the soldering switch 210 of the printed circuit board 200. The operation of the light-emitting element 220. Finally, the assembly of the elastic body 130 and the insulating sheet 110 is attached or superposed on the printed circuit board 200, that is, the light guiding structure 100 of the illuminated keyboard shown in FIG. 3 is completed.

According to the concept of the present invention, the process of the elastic body 130 and the insulating sheet 110, and the process of soldering the light-emitting element 220 (and the switch 210) to the printed circuit board 200 are performed separately. Therefore, regardless of whether the above two processes are performed synchronously or sequentially, after the two processes are completed, the two are stacked to complete the light guiding structure 100 of the illuminated keyboard. Therefore, by adding an insulating sheet 110, the elastic body 130 can be first adhered to the insulating sheet 110 and assembled to the printed circuit board 200, so that the elastic body 130 is not required to be glued on the printed circuit board 200 via the doctor blade. The utility model effectively overcomes the problem that the conventional scraper scrapes or damages the light-emitting component when the printed circuit board is brushed, and further improves the service life of the illuminated keyboard.

In other embodiments, as shown in FIG. 5, the elastic body 130 may be integrally formed with the insulating sheet 110, and then bonded to the printed circuit board 200 of the switch 210 and the light-emitting element 220 that have been soldered. In order to achieve the light guiding structure 100 in the illuminated keyboard. In the light guiding structure 100 of FIG. 5, the integrally formed elastic body 130 can be quickly superposed on the printed circuit board 200, which effectively improves the manufacturing time and assembly efficiency of the illuminated keyboard.

In summary, the embodiments disclosed herein are to be considered as illustrative of the present invention and are not intended to limit the present invention. The scope of this creation is defined by the scope of the appended patent application and covers its legal equivalents and is not limited to the foregoing description.

100‧‧‧Light guiding structure

110‧‧‧Insulation sheet

120‧‧‧through holes

130‧‧‧ Elastomers

140‧‧‧Trigger

150‧‧‧ Conductive layer

160‧‧‧Ring support

170‧‧‧ Groove

180‧‧‧Lighting keycap

182‧‧‧ Positioning block

190‧‧‧Connecting parts

200‧‧‧Printed circuit board

210‧‧‧ switch

220‧‧‧Lighting elements

FIG. 1 is an exploded cross-sectional view showing the inventive elastomer-attached insulating sheet.

2 is an exploded cross-sectional view showing the light guiding structure of the present illuminated keyboard.

3 is a cross-sectional view showing the laminated structure of the light guiding structure of the present illuminated keyboard.

4 is a cross-sectional view showing the present combined key and connector.

FIG. 5 is a view showing another embodiment of a light guiding structure of the present illuminated keyboard.

100‧‧‧Light guiding structure

110‧‧‧Insulation sheet

120‧‧‧through holes

130‧‧‧ Elastomers

140‧‧‧Trigger

150‧‧‧ Conductive layer

160‧‧‧Ring support

170‧‧‧ Groove

200‧‧‧Printed circuit board

210‧‧‧ switch

220‧‧‧Lighting elements

Claims (10)

A light guiding structure of an illuminated keyboard, comprising: an insulating sheet, a through hole; an elastic body attached to a side of the insulating sheet and disposed opposite to the transparent hole, the elastic body comprising a trigger portion and a setting And a printed circuit board electrically coupled to the other side of the insulating sheet, the printed circuit board electrically coupled to a switch and a light emitting component adjacent to the switch. The light guiding structure of the illuminated keyboard according to claim 1, wherein the light emitting element is disposed in the transparent hole. The light guiding structure of the illuminated keyboard according to claim 1, wherein the conductive layer corresponds to a switch, and when the elastic body is pressed, the conductive layer triggers the switch to generate an electronic signal. The light guiding structure of the illuminated keyboard of claim 1, wherein the elastic body further comprises an annular supporting portion attached to the insulating sheet and a groove disposed opposite to the triggering portion, the triggering portion is located at the annular support In the middle of the ministry. The light guiding structure of the illuminated keyboard according to claim 4, further comprising a light-transmitting keycap assembled in the groove and a connecting member disposed between the light-transmitting keycap and the insulating sheet. The light guiding structure of the illuminated keyboard according to claim 4, wherein the annular supporting portion and the triggering portion are integrally formed with the elastic body. The light guiding structure of the illuminated keyboard of claim 5, wherein the transparent keycap further comprises a positioning block disposed opposite the groove. The light guiding structure of the illuminated keyboard according to claim 1, wherein the elastic body is further integrally formed with the insulating sheet. The light guiding structure of the illuminated keyboard of claim 1, wherein the conductive layer comprises a plurality of conductive particles, each of the conductive particles being a metal, a nano metal or a metal alloy. The light guiding structure of the illuminated keyboard according to claim 1, wherein the insulating sheet is a Mylar, a rubber sheet or a film.