TWI607465B - Keyboard structure - Google Patents

Description

Keyboard structure

The present invention relates to a keyboard structure, and more particularly to a keyboard structure having a discharge path.

The keyboard is easy to receive static electricity from your fingers. Static electricity is attracted to the electronic components closest to the keycap, and the electronic components and components electrically connected thereto, such as a circuit board, are destroyed, thereby causing damage to the components. In addition, after the completion of the keyboard, static electricity is easily transmitted to the membrane switch layer via the light-emitting elements of the keyboard during the electrostatic test, thereby causing damage to the membrane switch layer and the components electrically connected thereto. Therefore, it is urgent to propose a solution that can divert static electricity.

Therefore, the present invention provides a keyboard structure that provides a discharge path that can conduct static electricity to a ground potential to avoid damage caused by static electricity.

According to an embodiment of the invention, a keyboard structure is proposed. The keyboard structure comprises a conductive bottom plate, a key cap, a thin film circuit layer, a light emitting component and a conductive cover. The conductive bottom plate is electrically connected to a ground potential, and the conductive bottom plate has an electrostatic conduction portion. The key cap is disposed on the conductive bottom plate, and the key cap is movable up and down with respect to the conductive bottom plate. The thin film circuit layer is disposed between the conductive backplane and the keycap. The light emitting element is disposed on the thin film circuit layer and is configured to emit a light. The conductive cover is disposed on the thin film circuit layer And covering the light-emitting element, the conductive cover has a light-transmissive area, and the light can pass through the light-transmitting area to reach the keycap. The conductive cover body is adjacent to the static electricity guiding portion. When an external static electricity occurs, the static electricity can be electrically connected to the ground through the conductive cover body, the electrostatic shielding portion and the conductive bottom plate.

According to another embodiment of the present invention, a keyboard structure is proposed. The keyboard structure comprises a conductive bottom plate, an electrostatic shielding portion, a key cap, a thin film circuit layer, a light emitting component and a conductive coating and a cover. The conductive backplane is electrically connected to a ground potential. The electrostatic shielding portion is connected to the conductive substrate. The thin film circuit layer is disposed on the conductive substrate. The key cap is disposed on the conductive bottom plate, and the key cap is movable up and down with respect to the conductive bottom plate. The light emitting element is disposed on the thin film circuit layer and is configured to emit a light. A conductive coating is applied over the thin film circuit layer and adjacent to the via. The cover body is disposed on the conductive coating and covers the light emitting element, and the cover body has a light transmitting area, and the light can pass through the light transmitting area to reach the key cap. The conductive coating is disposed in a coating area on the thin film circuit layer, and the coating area extends from the adjacent cover to the adjacent electrostatic conduction portion. When an external static electricity occurs, the static electricity may be electrically connected to the ground through the conductive coating, the electrostatic shielding portion, and the conductive bottom plate.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

100, 200, 300, 400‧‧‧ keyboard structure

110‧‧‧Key Cap

110a‧‧‧Light transmission area

120‧‧‧conductive bottom plate

121‧‧‧ board

122, 395‧‧‧Electrical Dispersal Department

122’a‧‧‧lateral edge

1221‧‧‧ root

1222‧‧‧End

130‧‧‧Lighting elements

140‧‧‧Electrical cover

140a‧‧‧Lighting area

150‧‧‧film circuit layer

150a, 150a’‧‧‧through

150a1‧‧‧through hole perimeter

150a11‧‧‧ first side

150a12‧‧‧ second side

150b‧‧‧ opening

151‧‧‧ lines

160‧‧‧Keycap support structure

170‧‧‧Package

180‧‧‧Adhesive layer

240‧‧‧ cover

290‧‧‧ Conductive coating

291‧‧‧First edge

292‧‧‧second edge

293‧‧‧ Third edge

L‧‧‧Light

P1‧‧‧First electrostatic conduction path

P2‧‧‧Second electrostatic conduction path

P3‧‧‧ third electrostatic conduction path

P4‧‧‧4th electrostatic conduction path

FIG. 1A is a partial external view of a keyboard structure according to an embodiment of the invention.

Fig. 1B is a cross-sectional view showing the keyboard structure of Fig. 1A in the direction 1B-1B'.

2A is a partial external view of a keyboard structure in accordance with another embodiment of the present invention.

Fig. 2B is a cross-sectional view showing the keyboard structure of Fig. 2A in the direction 2B-2B'.

FIG. 3A is a partial perspective view showing a keyboard structure of another embodiment of the balance bar according to the present invention.

Fig. 3B is a cross-sectional view showing the keyboard structure of Fig. 3A in the direction 3B-3B'.

FIG. 4A is a partial perspective view showing a keyboard structure of another embodiment of the balance bar according to the present invention.

Figure 4B is a cross-sectional view of the keyboard structure of Figure 4A taken along direction 4B-4B'.

Referring to FIGS. 1A and 1B, FIG. 1A is a partial perspective view of a keyboard structure 100 according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the keyboard structure 100 of FIG. 1A along the direction 1B-1B'.

The keyboard structure 100 includes a key cap 110 (shown only in FIG. 1B), a conductive substrate 120, a light-emitting element 130 (only shown in FIG. 1B), a conductive cover 140, a thin film circuit layer 150, and a key cap support structure 160 ( Only shown in Figure 1B), encapsulant 170 (shown only in Figure 1B) and adhesive layer 180 (shown only in Figure 1B). In order to make the relative relationship between the conductive bottom plate 120 and the conductive cover 140 clear, the components of the keycap 110, the light-emitting element 130, and the keycap support structure 160 are not shown in FIG.

As shown in FIG. 1B, the key cap 110 is disposed above the conductive bottom plate 120 and is movable up and down with respect to the conductive bottom plate 120. The conductive bottom plate 120 is electrically connected to the ground potential, so that the static electricity can be grounded through the conductive bottom plate 120. In this way, the thin film circuit layer 150 can be avoided by using different electrostatic conduction paths described later. The light-emitting element 130 and an element (such as a circuit board) electrically connected thereto are electrostatically destroyed.

As shown in FIG. 1B, the light-emitting element 130 is disposed on the thin film circuit layer 150 and emits light L. The conductive cover 140 is disposed on the thin film circuit layer 150 and covers the light emitting element 130. The conductive cover 140 has a light-transmissive region 140a, so that the light L can pass through the light-transmitting region 140a to reach the keycap 110, and is emitted from the light-transmitting region 110a of the keycap 110 to display the pressed state of the keycap 110.

The thin film circuit layer 150 is disposed between the conductive backplane 120 and the keycap 110. The conductive bottom plate 120 includes a connected plate body 121 and an electrostatically-dissipating portion 122. The plate body 121 and the static electricity guiding portion 122 may be an integrally formed structure (such as a stamping member). The thin film circuit layer 150 has a uniform hole 150a that extends from bottom to top through the through hole 150a to be adjacent to the conductive cover 140. "Proximity" herein refers to "contact" or "close to but not in contact." Since the electrostatic shielding portion 122 is adjacent to the conductive cover 140, an external static electricity is easily guided from the conductive cover 140 to the electrostatic shielding portion 122, and is electrically connected to the ground via the plate 121. That is, the conductive cover 140, the electrostatically-dissipating portion 122, and the plate body 121 form a first electrostatic conduction path P1, so that when static electricity occurs, static electricity can be conducted through the first electrostatic conduction path P1 to be grounded.

As shown in FIG. 1A, the electrostatic distraction portion 122 has a root portion 1221 and an end portion 1222. The outer diameter of the end portion 1222 of the electrostatic distraction portion is smaller than the outer diameter of the root portion 1221, and even if the surface curvature of the end portion 1222 of the electrostatic distraction portion is higher than the surface curvature of the root portion 1221, static electricity is easily made from the conductive cover 140 according to the principle of tip discharge. Discharge to the end portion 1222 having a smaller outer diameter. In another embodiment, the specific structure of the electrostatic shielding portion 122 may be a hook structure, and the tail end of the hook structure has a tip end and the tip end is adjacent to the tip end. And extending toward the conductive cover 140. In another embodiment, the outer diameter of the electrostatic shielding portion 122 is tapered from the root portion 1221 toward the end portion 1222, that is, the surface curvature of the electrostatically-distributing portion 122 gradually increases from the root portion 1221 toward the end portion 1222, so that the end portion is increased. The surface curvature of 1222 is higher than the surface curvature of root 1221.

As shown in FIG. 1B, the thin film circuit layer 150 includes openings 150b and a plurality of lines 151 that are exposed in the openings 150b. The light emitting element 130 is electrically connected to the lines 151 via the opening 150b to receive external electrical energy.

As shown in FIG. 1B, the keycap support structure 160 connects the keycap 110 to the conductive backplane 120. In detail, the key cap 110 can be coupled to the upper end of the keycap support structure 160. The electrostatic distraction portion 122 is a first bottom plate fixing mechanism, and the lower end of the keycap support structure 160 can be coupled to the first bottom plate fixing mechanism. The keycap support structure 160 can lift the keycap 110 to move the keycap 110 up and down between the unpressed position and the pressed position. As shown in FIG. 1B, the keycap support structure 160 is, for example, a scissor foot mechanism.

As shown in FIG. 1B, the encapsulant 170 covers the light emitting element 130 and the opening 150b to protect the light emitting element 130. The encapsulant 170 may be a light transmissive glue having fluorescent particles, such that the wavelength of the light L emitted by the light emitting element 130 can be converted. In another embodiment, the encapsulant 170 can be a light transmissive glue that does not have fluorescent particles. The adhesive layer 180 is formed between the conductive cover 140 and the thin film circuit layer 150 to bond the conductive cover 140 and the thin film circuit layer 150.

2A and 2B, FIG. 2A is a partial external view of a keyboard structure 200 according to another embodiment of the present invention, and FIG. 2B is a cross-sectional view of the keyboard structure 200 of FIG. 2A along the direction 2B-2B'. . In order to avoid the complexity of the illustration, Figure 2A does not show the keycap Support structure 160.

The keyboard structure 200 includes a keycap 110, a conductive substrate 120, a light emitting element 130, a cover 240, a thin film circuit layer 150, a keycap support structure 160, an encapsulant 170, an adhesive layer 180, and a conductive coating 290.

Unlike the keyboard structure 100, the cover 240 of the present embodiment is an insulating cover. In addition, the conductive coating 290 is coated in a coating region of the thin film circuit layer 150, and the coating region extends from the adjacent cover 240 to the through hole 150a adjacent to the thin film circuit layer 150 to be adjacent to the electrostatic shielding portion 122. As shown in Figure 2A. The conductive coating 290 is located between the thin film circuit layer 150 and the cover 240. The cover 240 is disposed on the conductive coating 290. The adhesive layer 180 is formed between the cover 240 and the conductive coating 290 to bond the cover 240 and the conductive coating 290. In addition, as shown in FIG. 2A, although the cover 240 is an insulating cover, since the conductive coating 290 is disposed around the entire cover 240, the static electricity close to the cover 240 can be located on the side of the cover 240. The conductive substrate 120 is conducted through the conductive coating 290.

In this embodiment, as shown in FIG. 2A, the conductive coating 290 and the electrostatically-distributing portion 122' form a second electrostatic conduction path P2 with the body 121. In detail, the through hole 150a' of the thin film circuit layer 150 has a uniform hole periphery 150a1, and the electrostatic stripping portion 122' (the second bottom plate fixing mechanism) has a substantially vertical extending side edge 122'a through which the electrostatically conductive portion 122' passes. The through hole 150a', and the side edge 122'a is adjacent to the through hole periphery 150a1; and the coated area of the conductive coating 290 extends to the through hole periphery 150a1, so that the static electricity can be sequentially passed through the conductive coating 290 shown in FIG. 2A, The through hole peripheral edge 150a1 and the static distraction portion 122' are separated from the second static conduction path P2 formed by the body 121. To the ground.

In detail, as shown in FIG. 2A, the through hole peripheral edge 150a1 has a first side 150a11 and a second side 150a12. The conductive coating 290 includes a first edge portion 291, a second edge portion 292, and a third edge portion 293, wherein the first edge portion 291 and the third edge portion 293 are not adjacent to each other. The first edge portion 291, the second edge portion 292, and the third edge portion 293 are sequentially arranged in a U shape, and the electrostatic shielding portion 122 (first bottom plate fixing mechanism) is located in the U-shaped notch. The first edge portion 291 of the conductive coating 290 abuts the first side 150a11 of the through hole circumference 150a1, the second edge portion 292 of the conductive coating 290 abuts the second side 150a12 of the through hole circumference 150a1, and the third side of the through hole periphery 150a1 The edge portion 293 is adjacent to the electrostatically-distributed portion 122'. The cover 240 is disposed adjacent to the first edge portion 291 of the conductive coating 290. When static electricity is generated from the outside, the static electricity can be sequentially transmitted to the ground through the first edge portion 291, the second edge portion 292, the third edge portion 293, and the static conduction portion 122'.

In another embodiment, the insulating cover 240 of FIG. 2B can also be replaced by the conductive cover 140, so that static electricity can be simultaneously transmitted to the ground through the first electrostatic conduction path P1 and the second electrostatic conduction path P2 to increase the electrostatic conduction. effect.

Referring to FIGS. 3A and 3B , FIG. 3A is a partial external view of a keyboard structure 300 according to another embodiment of the present invention, wherein FIG. 3B illustrates a keyboard structure 300 of FIG. 3A. A cross-sectional view of direction 3B-3B'. To avoid over-complicating the illustration, the keycap support structure 160 is not shown in FIG. 3A.

The keyboard structure 300 includes a key cap 110, a conductive bottom plate 120, a light emitting element 130, a conductive cover 140, a thin film circuit layer 150, a key cap support structure 160, and a cover. The glue 170, the adhesive layer 180 and the static electricity guiding portion 395 are installed. The electrostatic distraction portion 395 of this embodiment is a balance bar.

The upper end of the electrostatic shielding portion 395 can be connected to the keycap 110. The lower end of the electrostatic shielding portion 395 can be connected to the pivoting portion 123 of the conductive bottom plate 120. The electrostatic shielding portion 395 extends above the conductive bottom plate 120 and adjacent to the conductive cover 140.

In this embodiment, the conductive cover 140, the electrostatic shielding portion 395, and the pivoting portion 123 of the conductive bottom plate 120 form a third static conduction path P3 with the plate 121. When static electricity is generated outside and the electrostatic position is close to the conductive cover 140, the static electricity can be grounded through the third electrostatic conduction path P3.

Please refer to FIG. 4A and FIG. 4B , FIG. 4A is a partial external view of a keyboard structure 400 according to another embodiment of the present invention, and FIG. 4B is a view along the keyboard structure 400 of FIG. A cross-sectional view of direction 4B-4B'. To avoid over-complicating the illustration, the keycap support structure 160 is not shown in FIG. 4A.

The keyboard structure 400 includes a keycap 110, a conductive bottom plate 120, a light emitting element 130, a cover 240, a thin film circuit layer 150, a keycap support structure 160, an encapsulant 170, an adhesive layer 180, a conductive coating 290, and an electrostatic distraction portion 395.

In this embodiment, the conductive coating 290, the electrostatic shielding portion 395, the pivoting portion 123 of the conductive bottom plate 120 and the plate body 121 form a fourth static conduction path P4. When static electricity is generated outside and the electrostatic position is close to the cover 240, the static electricity can be electrically grounded through the fourth static conduction path P4.

In another embodiment, the static electricity can also be diverted to the ground through the third electrostatic conduction path P3 and the fourth electrostatic discharge path P4, thereby increasing the electrostatic discharge effect. fruit.

In summary, the static electricity can be conducted to the ground through the conductive cover 140 or the conductive coating 290 to avoid electrostatic damage to the light-emitting element 130 or/and electronic components electrically connected to the light-emitting element 130, such as a circuit board. The electrostatic dispersing portion of the bottom plate may be (1) an electrostatic dispersing portion 122 (first bottom plate fixing mechanism) protruding upward from the bottom plate, or (2) an electrostatic dispersing portion 395 (balanced connecting rod) that is pivotally connected to the bottom plate; In terms of dissipating static electricity through the conductive cover 140, the static conduction path may be the conductive cover 140 → the electrostatic shielding portion 122 → the plate body 121 and/or the conductive cover 140 → the electrostatic conduction portion 395 → the plate body 121 . In terms of dissipating static electricity through the conductive coating 290, the static conduction path may be the conductive coating 290 → the electrostatic shielding portion 122 → the plate body 121 and/or the conductive coating 290 → the electrostatic shielding portion 395 → the plate body 121 .

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧ keyboard structure

120‧‧‧conductive bottom plate

121‧‧‧ board

122‧‧‧Electrical Dispersal Department

1221‧‧‧ root

1222‧‧‧End

140‧‧‧Electrical cover

150‧‧‧film circuit layer

Claims (8)

A keyboard structure comprising: a conductive bottom plate electrically connected to a ground potential; an electrostatic stripping portion connected to the conductive bottom plate; a thin film circuit layer disposed on the conductive bottom plate; and a key cap disposed on the conductive bottom plate The key cap is movable up and down with respect to the conductive bottom plate; a light emitting element is disposed on the thin film circuit layer for emitting a light; a cover body covers the light emitting element, and the cover body has a light transmitting area The light can pass through the transparent region to reach the key cap; and a conductive coating, the cover is disposed on the conductive coating, and the conductive coating is disposed on a coating region of the thin film circuit layer The coating region extends from adjacent to the cover to be adjacent to the electrostatic shielding portion; wherein the thin film circuit layer has a consistent hole, the through hole has a consistent hole circumference, the through hole periphery has a first side and a a second side; the conductive coating includes a first edge portion, a second edge portion and a third edge portion, the first edge portion and the third edge portion are not adjacent to each other; the first edge portion is adjacent to The first side, the second edge Adjacent to the second side, the third edge portion is adjacent to the electrostatic shielding portion, and the cover body is disposed adjacent to the first edge portion; and when an electrostatic force is externally generated, the static electricity may sequentially pass through the first cover body The edge portion, the second edge portion, the third edge portion, and the electrostatically-dissipating portion are groomed to The ground terminal. The keyboard structure as claimed in claim 1, further comprising a keycap support structure, the key cap is coupled to the upper end of the keycap support structure, and the electrostatic shielding portion is a first bottom plate fixing mechanism, the key cap The lower end of the support structure is coupled to the first bottom plate fixing mechanism. The keyboard structure of claim 1, further comprising a keycap support structure, the keycap is coupled to the upper end of the keycap support structure, the bottom plate further has a second bottom plate fixing mechanism, the keycap support structure The lower end is coupled to the second bottom plate fixing mechanism, and the second bottom plate fixing mechanism passes through the through hole. The keyboard structure of claim 1, wherein the first edge portion, the second edge portion and the third edge portion sequentially have a U-shaped arrangement, and the electrostatic shielding portion is located in the U-shaped gap. in. The keyboard structure of claim 3, wherein the third edge portion extends between the second bottom plate fixing mechanism and the static electricity guiding portion. The keyboard structure according to claim 1, wherein the electrostatic shielding portion is a hook-shaped structure, and the tail end of the hook structure has a tip end adjacent to the cover body. The keyboard structure of claim 6, wherein the hook-shaped structure has a portion and an end portion, and an outer diameter of the electrostatically-distributing portion is tapered from the root portion toward the end portion, so that the end portion is The surface curvature is higher than the surface curvature of the root. The keyboard structure of claim 1, wherein the cover is disposed in the coating area, and the conductive coating is disposed around the cover.