TWM505048U - Light-emitting key button device - Google Patents

Description

Illuminated button device

The present invention relates to a button device applied to a keyboard, and more particularly to a button device having a light emitting function.

Referring to FIG. 1, the illuminated button device of the prior keyboard has a function of emitting light, which can indicate the operating state of each button of the user. The light-emitting button device comprises a substrate 91, a thin film circuit board 92 on the top surface of the substrate 91, a key cap 93 located above and spaced apart from the thin film circuit board 92, and a top surface of the thin film circuit board 92. The elastic member 94 between the key caps 93, a scissor bracket 95 connecting the substrate 91 and the key cap 93, and a light emitting unit 96 disposed on the top surface of the thin film circuit board 92 and located under the key cap 93. When the keycap 93 is pressed, the keycap 93 interlocks the scissor bracket 95 and compresses the elastic member 94 to cause the membrane circuit board 92 to generate a correspondingly pressed circuit signal.

The light-emitting unit 96 includes a light-emitting diode 961 disposed on a top surface of the thin film circuit board 92 and facing the keycap 93, and a light shield 962 covering the light-emitting diode 961. The hood 962 is adhered to the top surface of the film circuit board 92 by adhesive bonding. The top end of the hood 962 has a through hole 963, and the position of the through hole 963 is aligned with a position of a through hole 931 of the key cap 93. The light generated by the LED 961 passes through the through hole 963 and the through hole 931 in sequence. Irradiation to the outside of the keycap 93, whereby the light exposed by the keycap 93 allows the user to recognize the symbol or numeral indicated on the outer surface of the keycap 93 in a dim environment.

Since the hood 962 is generally larger in volume than the illuminating diode 961, and a gap is formed between the hood 962 and the illuminating diode 961, when the user presses the keycap 93 to move the keycap 93 downward, the key The cap 93 will be blocked by the hood 962, so that the key cap 93 cannot smoothly press the elastic member 94 and the scissor bracket 95 downward, so that a contact protrusion 941 of the elastic member 94 cannot be The conductive portion 921 of the thin film circuit board 92 is in contact with the conduction. Furthermore, if the bonding of the hood 962 and the film circuit board 92 is offset or detached, the effect of concentrating the light-emitting diode 961 is affected, thereby reducing the manufacturing yield of the light-emitting button device.

Therefore, the object of the present invention is to provide a light-emitting button device capable of effectively reducing the height of the light-emitting unit by forming a light-shielding layer on the outer surface of the light-emitting element, so that the light-emitting button device can be applied to a thin product.

Therefore, the novel light-emitting button device comprises a circuit board assembly, a pressing component and a lighting unit. The pressing component is disposed on the circuit substrate assembly and includes a key cap spaced above the circuit substrate, the key cap including a light transmitting portion. The light emitting unit is disposed on the circuit board assembly and located under the keycap, and includes a light emitting component electrically connected to the circuit substrate assembly, and a light shielding layer having an outer surface, the light shielding layer being formed on the light shielding layer The outer surface, the light shielding layer has a face facing the keycap and is used The light generated by the light-emitting element is exposed and irradiated to the through hole of the light transmitting portion.

In some embodiments, the outer surface has an upper light emitting surface, and the light shielding layer has an upper light shielding portion formed on the upper light emitting surface, the upper light shielding portion defining the through hole.

In some embodiments, the outer surface further has a peripheral surface connected to the outer periphery of the upper light emitting surface, and the light shielding layer further has a surrounding light shielding portion formed on the peripheral surface and connected to the periphery of the upper light shielding portion.

In some embodiments, the key cap is formed with a groove through which the light emitting unit can pass, and the height of the groove is greater than the height of the light emitting unit.

The effect of the novel is that the height of the light-emitting unit can be effectively reduced by forming the light-shielding layer on the outer surface of the light-emitting element, and the light-emitting unit is suitable for a thin product.

10‧‧‧Circuit board assembly

1‧‧‧Substrate

2‧‧‧Film board

21‧‧‧Circuit board

211‧‧‧Training Department

22‧‧‧Insulation surface

221‧‧‧ first opening

222‧‧‧ second opening

30‧‧‧ Pressing components

3‧‧‧Key Cap

31‧‧‧Cap

32‧‧‧Cap

33‧‧‧ Groove

34‧‧‧Transmission Department

4‧‧‧Flexible components

41‧‧‧Flexible Department

42‧‧‧Touching convex

5‧‧‧Lighting unit

51‧‧‧Lighting elements

511‧‧‧ outer surface

511a‧‧‧ week face

511b‧‧‧Glowing face

52‧‧‧Lighting layer

521‧‧‧through hole

522‧‧‧ Around the sunshade

523‧‧‧Upper shade

6‧‧‧Link bracket

7‧‧‧Base plate

H1‧‧‧ Height

H2‧‧‧ Height

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a side cross-sectional view showing a conventional illuminating button device having a hood; FIG. 2 is a perspective view, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is an exploded perspective view of the preferred embodiment; FIG. 4 is a side cross-sectional view showing the preferred embodiment in an initial position; and FIG. Side view of the cross-sectional view showing the preferred embodiment in a lower pressure position And FIG. 6 is a partial enlarged view of FIG. 5 illustrating the light path of the light emitting unit of the preferred embodiment.

Referring to FIG. 2 and FIG. 3, a preferred embodiment of the novel light-emitting button device comprises a circuit substrate assembly 10, a pressing assembly 30, and a light-emitting unit 5. The circuit board assembly 10 includes a substrate 1, a thin film circuit board 2 disposed on a top surface of the substrate 1, and a bottom plate 7 disposed under the substrate 1 for covering the substrate 1. The pressing assembly 30 includes a key cap 3 located above the thin film circuit board 2 and spaced apart from the thin film circuit board 2, a connecting bracket 6 connecting the substrate 1 and supporting the keying cap 2, and a film disposed on the film An elastic member 4 between the top surface of the circuit board 2 and the keycap 3. The light emitting unit 5 is disposed on the top surface of the thin film circuit board 2 and below the keycap 3.

The thin film circuit board 2 includes a circuit board body 21 disposed on a top surface of the substrate 1 and an insulating surface layer 22 disposed on a top surface of the circuit board body 21. The circuit board body 21 has a conductive portion 211 under the elastic member 4. The conductive portion 211 can be a membrane switch or other trigger switch. The light emitting unit 5 is disposed on the circuit board body 21. The insulating surface layer 22 has a first opening 221 corresponding to the position of the conductive portion 211 and through which the conductive portion 211 is disposed, and a position corresponding to the position of the light emitting unit 5 and the light emitting unit 5 is disposed therein. The second opening 222.

Referring to Fig. 3, the elastic member 4 is disposed on the insulating surface layer 22 of the film circuit board 2, and the elastic member 4 is made of an elastic material such as rubber. The elastic member 4 has a fixing on the insulating surface layer 22 and is pre-arrived The elastic portion 41 of the keycap 31 and a contact convex portion 42. The elastic portion 41 has a cap shape, and the contact convex portion 42 protrudes from the inner surface of the elastic portion 41 and is spaced above the conductive portion 211 for contacting the conductive portion 211.

Referring to FIG. 4, the key cap 3 includes a cap body 31 disposed at the top end of the elastic member 4, a cap 32 extending from the periphery of the cap body 31 toward the film circuit board 2, and a cap body 31 and the cap 32. The groove 33 is defined together, and a light transmitting portion 34 is formed on the cap body 31. In the preferred embodiment, the light transmitting portion 34 is a through hole for light to pass through. It should be noted that the light transmitting portion 34 is not limited to the perforated form, for example, in other embodiments. The light transmitting portion 34 may also be a light transmissive material. Further, the shape of the light transmitting portion 34 may be a character, a symbol, a pattern or a number.

The connecting bracket 6 is a scissor bracket connecting the keycap 3 and the substrate 1. The key cap 3 can be moved up and down relative to the substrate 1 through an initial position and a pressing position through the connecting bracket 6. The above embodiment provides an exemplary guiding bracket 6 , which is not limited to the connecting bracket 6 . For example, in other embodiments, the connecting bracket 6 can be connected to the key cap 3 and the substrate 1 respectively. The link structure is not limited to the scissor bracket.

Referring to FIGS. 4 and 5, if no external force is applied to the keycap 3, the elastic portion 41 keeps the keycap 3 in an initial position with respect to the thin film circuit board 2. When the keycap 3 is pressed by an external force, the keycap 3 moves the connecting bracket 6 toward the substrate 1, and the elastic portion 41 is deformed by the cap body 31 to be deformed when the keycap 3 is moved to the When the position is depressed, the contact protrusion 42 touches the conduction portion 211 to cause the film circuit board 2 to generate a corresponding circuit signal. When the external force disappears, the elastic portion 41 is accumulated by deformation. The positional force drives the keycap 3 to move up and return to the initial position.

Referring to FIG. 6, the light emitting unit 5 includes a light emitting element 51 electrically connected to the circuit board body 21 of the thin film circuit board 2, and a light shielding layer 52 having a through hole 521. Specifically, the light-emitting element 51 is a light-emitting diode having an outer surface 511. The light-shielding layer 52 is made of a material having a light-shielding effect. The light-shielding layer 52 of the embodiment is, for example, painted, plated. A metal or other surface treatment is formed on the outer surface 511, and the through hole 521 is cut in the light shielding layer 52 by laser engraving. The outer surface 511 of the light-emitting element 51 has a peripheral surface portion 511a, and an upper light-emitting surface portion 511b at the top end of the circumferential surface portion 511a. The light-shielding layer 52 has a surrounding light-shielding portion 522 formed on the circumferential surface portion 511a, and a The upper light-emitting surface portion 511b is connected to the upper light-shielding portion 523 surrounding the top end of the light-shielding portion 522, and the upper light-shielding portion 523 defines the through hole 521. Since the light shielding layer 52 is directly formed on the outer surface 511 of the light-emitting element 51, no gap is formed between the surrounding light-shielding portion 522 and the upper light-shielding portion 523 and the circumferential surface portion 511a and the upper light-emitting surface portion 511b. The height H1 of the light emitting unit 5 can be effectively reduced.

The light-emitting unit 5 corresponds to the position of the recess 33 of the keycap 3, and since the height H2 of the recess 33 is larger than the height H1 of the light-emitting unit 5, when the keycap 3 is pressed from the initial position to the depressed position At this time, the light-emitting unit 5 will penetrate into the recess 33 without blocking the keycap 3. Therefore, when the keycap 3 is pressed, the elastic member 4 and the connecting bracket 6 can be smoothly pressed and moved to the depressed position, so that the contact convex portion 42 of the elastic member 4 can be surely touched to the conductive portion 211. .

Referring to FIG. 6, when the light-emitting element 51 emits light, since the circumferential surface portion 511a of the light-emitting element 51 is completely shielded by the light-shielding portion 522 of the light-shielding layer 52, the upper light-emitting surface portion 511b is partially shielded by the upper light-shielding portion 523. Therefore, the light emitted from the upper surface 511b (the arrow in FIG. 6) is sequentially irradiated to the outside of the keycap 3 through the through hole 521 and the light transmitting portion 34, whereby the light exposed by the key cap 3 is emitted. The user can recognize the operating state of the illuminated button device.

In summary, the illuminating unit 5 omits a conventional hood covering the illuminating diode, and is replaced by a light shielding layer 52 formed on the outer surface 511 of the illuminating element 51, which occupies less space. The key cap 3 can thus smoothly press the elastic member 4 and the connecting bracket 6 to move to the depressed position, so that the contact convex portion 42 can reliably touch the conductive portion 211 and generate a corresponding electrical signal. The illuminating button device of the embodiment can be applied to a product having a thin thickness. In addition, the present embodiment eliminates the problem of offset or shedding caused by the conventional hood attachment, thereby improving the manufacturing yield, and also eliminating the process of the hood and the hood, and reducing the cost. Therefore, the purpose of this new type can be achieved.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

10‧‧‧Circuit board assembly

1‧‧‧Substrate

2‧‧‧Film board

21‧‧‧Circuit board

211‧‧‧Training Department

22‧‧‧Insulation surface

30‧‧‧ Pressing components

3‧‧‧Key Cap

31‧‧‧Cap

32‧‧‧Cap

33‧‧‧ Groove

34‧‧‧Transmission Department

4‧‧‧Flexible components

41‧‧‧Flexible Department

42‧‧‧Touching convex

5‧‧‧Lighting unit

51‧‧‧Lighting elements

511‧‧‧ outer surface

511a‧‧‧ week face

511b‧‧‧Glowing face

52‧‧‧Lighting layer

521‧‧‧through hole

522‧‧‧ Around the sunshade

523‧‧‧Upper shade

6‧‧‧Link bracket

7‧‧‧Base plate

Claims (4)

An illuminating button device comprising: a circuit board assembly; a pressing component disposed on the circuit board assembly and including a key cap spaced above the circuit board assembly, the key cap comprising a light transmitting portion; and a light emitting unit The light-emitting unit includes a light-emitting element electrically connected to the circuit board assembly, and a light-shielding layer having an outer surface, the light-shielding layer being formed on the circuit board assembly and disposed under the keycap In the outer surface, the light shielding layer has a through hole facing the key cap and for emitting light generated by the light emitting element and irradiating the light transmitting portion. The illuminating button device of claim 1, wherein the outer surface has an upper illuminating surface, and the opaque layer has an upper opaque portion formed on the upper illuminating portion, the upper illuminating portion defining the through hole. The illuminating button device of claim 2, wherein the outer surface further has a peripheral surface connected to an outer periphery of the upper illuminating surface, the light shielding layer further having a peripheral surface formed on the peripheral surface and connected to the periphery of the upper opaque portion Around the sunshade. The illuminating button device of 2 or 3, wherein the key cap is formed with a groove through which the illuminating unit can pass, the height of the groove being greater than the height of the illuminating unit.