CN115458356A - Luminous key - Google Patents

Luminous key Download PDF

Info

Publication number
CN115458356A
CN115458356A CN202110642027.0A CN202110642027A CN115458356A CN 115458356 A CN115458356 A CN 115458356A CN 202110642027 A CN202110642027 A CN 202110642027A CN 115458356 A CN115458356 A CN 115458356A
Authority
CN
China
Prior art keywords
light
guide plate
elastic body
light guide
broken hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110642027.0A
Other languages
Chinese (zh)
Inventor
谢德勋
陈兆俞
陈晏彰
林坤德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Dafang Electronics Co ltd
Darfon Electronics Corp
Original Assignee
Chongqing Dafang Electronics Co ltd
Darfon Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Dafang Electronics Co ltd, Darfon Electronics Corp filed Critical Chongqing Dafang Electronics Co ltd
Priority to CN202110642027.0A priority Critical patent/CN115458356A/en
Publication of CN115458356A publication Critical patent/CN115458356A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H01H13/7065—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/84—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
    • H01H13/85—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback characterised by tactile feedback features

Landscapes

  • Push-Button Switches (AREA)

Abstract

The invention discloses a luminous key, which comprises a bottom plate, a thin film switch layer, a keycap, a lifting mechanism, a backlight device and at least one elastic body. The bottom plate is provided with at least one first broken hole. The membrane switch layer is provided with at least one second broken hole. The membrane switch layer is arranged on the upper surface or the lower surface of the bottom plate to enable each second broken hole to be located above or below the corresponding first broken hole. The lifting mechanism is arranged between the bottom plate and the keycap. The lifting mechanism comprises at least one protruding structure. At least one elastomer is formed on the backlight device. The backlight device is arranged below the bottom plate so that each elastic body penetrates through the corresponding first broken hole and the corresponding second broken hole. When the keycap is located at the pressing position, each protruding structure extends into the corresponding first broken hole and the corresponding second broken hole and is compressed and arranged in the corresponding elastic body. The present invention utilizes an elastomer formed on the backlight to help eliminate noise and improve tactile feedback of depression.

Description

Luminous key
Technical Field
The present invention relates to a light-emitting key, and more particularly, to a light-emitting key capable of improving the tactile feedback of pressing and eliminating noise during operation.
Background
Keyboards are already a common input peripheral device in the market. In order to eliminate the noise generated during the operation and improve the feedback of the pressing touch feeling, the prior art key includes a membrane switch layer, an elastic dome sheet forming a buffer structure relative to a base plate to absorb the impact energy of a keycap, a lifting mechanism, a balance rod, etc. when the key is pressed, thereby eliminating the noise.
However, the prior art key structure for eliminating noise is quite complicated. Moreover, when the key is designed to be a thin key, part of the lifting mechanism extends into the broken hole of the bottom plate, so that certain parts of the lifting mechanism tend to impact the bottom plate. Therefore, the membrane switch layer or the bottom plate of the thin key cannot provide enough buffer space, and the structure of the prior art key for eliminating noise is difficult to be implemented on the thin key. In addition, no technique for using a backlight device to assist in noise reduction has been proposed for a light-emitting key using a backlight device including a light guide plate.
Disclosure of Invention
Therefore, the present invention is directed to a light-emitting key with a backlight device to eliminate noise and improve tactile feedback. The structure of the luminous key for eliminating noise can be implemented on a thinned luminous key.
In order to achieve the above object, the present invention provides a light-emitting key, which includes a bottom plate, a thin-film switch layer, a key cap, a lifting mechanism, a backlight device, and at least one elastic body. The bottom plate is provided with at least one first broken hole; the membrane switch layer is provided with at least one second broken hole, each second broken hole corresponds to one first broken hole in the at least one first broken hole, and the membrane switch layer is arranged on the upper surface of the bottom plate so that each second broken hole is positioned above the corresponding first broken hole or arranged on the lower surface of the bottom plate so that each second broken hole is positioned below the corresponding first broken hole; the keycap is arranged above the bottom plate and can vertically move relative to the bottom plate; the lifting mechanism is arranged between the base plate and the keycap and limits the keycap to move between an unpressed position and a pressed position, the lifting mechanism comprises at least one protruding structure, and each protruding structure corresponds to one second broken hole in the at least one second broken hole; at least one elastic body is formed on the backlight device, each elastic body corresponds to one first broken hole in the at least one first broken hole, the backlight device is arranged below the bottom plate, so that each elastic body is arranged in the corresponding first broken hole and the corresponding second broken hole, and when the keycap is positioned at the pressing position, each protruding structure extends into the corresponding first broken hole and the corresponding second broken hole and compresses the corresponding elastic body.
As an optional technical solution, the backlight device includes a light guide plate, a light reflecting sheet, and a light shielding film. The light guide plate is provided with a front surface and a back surface; the light reflecting sheet is arranged on the back surface of the light guide plate; the light shielding film is provided with at least one third broken hole, each elastic body corresponds to one third broken hole in the at least one third broken hole, the at least one elastic body is formed on the front surface of the light guide plate, and the light shielding film is arranged on the front surface of the light guide plate so that each elastic body penetrates through the corresponding third broken hole.
As an optional technical solution, the backlight device includes a light guide plate, a light reflecting sheet, and a light shielding film. The light guide plate is provided with a front surface and a back surface; the light reflecting sheet is arranged on the back surface of the light guide plate; the shading film is arranged on the front surface of the light guide plate, wherein the at least one elastomer is formed on the shading film.
As an optional technical solution, at least one non-light guiding region is defined on the back surface of the light guide plate, each non-light guiding region corresponds to one of the at least one elastic body and is located below the corresponding elastic body, the backlight device further includes a plurality of light turning structures, the plurality of light turning structures are formed on other regions of the back surface of the light guide plate except the at least one non-light guiding region, and the plurality of light turning structures are used for guiding the light rays emitted to the plurality of light turning structures to the front surface of the light guide plate.
As an optional technical solution, the light shielding film has a top surface and a bottom surface, the top surface of the light shielding film defines at least one light shielding region, each light shielding region corresponds to one of the at least one elastic body and is located below the corresponding elastic body, the bottom surface of the light shielding film defines at least one light reflecting region, each light reflecting region corresponds to one of the at least one elastic body and is located below the corresponding elastic body, the backlight device further includes at least one light shielding film and at least one light reflecting film, each light shielding film corresponds to one of the at least one light shielding region and is formed on the corresponding light shielding region, and each light reflecting film corresponds to one of the at least one light reflecting region and is formed on the corresponding light reflecting region.
As an optional technical solution, the backlight device includes a light guide plate, a light reflecting sheet, and a light shielding film. The light guide plate is provided with a front surface and a back surface; the light reflecting sheet is arranged on the back surface of the light guide plate; the shading film is provided with at least one first protruding part protruding upwards, each elastic body corresponds to one first protruding part of the at least one first protruding part, the at least one elastic body is formed on the front surface of the light guide plate, and the shading film is arranged on the front surface of the light guide plate so that each elastic body is sleeved into the corresponding first protruding part.
As an optional technical solution, the backlight device includes a light guide plate, a light reflecting sheet, and a light shielding film. The light guide plate is provided with a front surface and a back surface; the light reflecting sheet is arranged on the back surface of the light guide plate; the shading film is provided with at least one second protruding part protruding upwards, the at least one second protruding part serves as the at least one elastic body, and the shading film is arranged on the front face of the light guide plate.
As an optional technical solution, the back surface of the light guide plate defines at least one non-light guiding region, each non-light guiding region corresponds to one of the at least one second protruding portion and is located below the corresponding second protruding portion, the backlight device further includes a plurality of light turning structures, the plurality of light turning structures are formed on other regions of the back surface of the light guide plate except the at least one non-light guiding region, and the plurality of light turning structures are used for guiding the light rays emitted to the plurality of light turning structures to the front surface of the light guide plate.
As an optional technical solution, the backlight device includes a light guide plate, a light reflecting sheet, and a light shielding film. The light guide plate is provided with a front surface and a back surface, and the at least one elastomer is formed on the front surface of the light guide plate; the light reflecting sheet is arranged on the back surface of the light guide plate; the shading film is arranged on the front surface of the light guide plate and covers the at least one elastic body.
As an optional technical solution, the back surface of the light guide plate defines at least one non-light guiding region, each non-light guiding region corresponds to one of the at least one elastic body and is located below the corresponding elastic body, the backlight device further includes a plurality of light turning structures, the plurality of light turning structures are formed on other regions of the back surface of the light guide plate except the at least one non-light guiding region, and the plurality of light turning structures are used for guiding the light rays emitted to the plurality of light turning structures to the front surface of the light guide plate.
In addition, the invention also provides a light-emitting key which comprises a bottom plate, a thin film switch layer, a keycap, a lifting mechanism, a backlight device and at least one elastic body. The bottom plate is provided with at least one first broken hole; the membrane switch layer is arranged on the upper surface or the lower surface of the bottom plate; the keycap is arranged above the bottom plate and can vertically move relative to the bottom plate; the lifting mechanism is arranged between the base plate and the keycap and limits the keycap to move between an unpressed position and a pressed position, and the lifting mechanism comprises at least one protruding structure; at least one elastic body is formed on the backlight device and corresponds to the at least one protruding structure, wherein when the keycap is located at the pressing position, the at least one protruding structure penetrates through the bottom plate and the thin film switch layer and compresses the at least one elastic body on the backlight device.
Unlike the prior art, the light-emitting key according to the present invention does not form a buffer structure on the membrane switch layer relative to the bottom plate, but uses an elastic body formed on the backlight device to help eliminate noise and improve the press touch feedback.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a perspective view illustrating an appearance of a light-emitting key according to a preferred embodiment of the invention.
Fig. 2 is an expanded view of the elements and components of the light-emitting key according to the preferred embodiment of the invention.
FIG. 3 isbase:Sub>A cross-sectional view of the illuminated key of FIG. 2, as assembled and in an un-depressed position, taken along line A-A.
FIG. 4 isbase:Sub>A cross-sectional view of the illuminated key of FIG. 2 shown in an assembled and depressed position and taken along line A-A.
Fig. 5 is a partial cross-sectional view of an embodiment of a backlight device and an elastic body of a light-emitting key according to the present invention.
FIG. 6 is a partial cross-sectional view of another embodiment of the backlight device and the elastic body of the luminescent key according to the present invention.
FIG. 7 is a partial cross-sectional view of another embodiment of a backlight device and an elastic body of a luminescent key according to the present invention.
FIG. 8 is a partial cross-sectional view of another embodiment of a backlight device and an elastic body of a luminescent key according to the present invention.
Fig. 9 is a partial cross-sectional view of another embodiment of the backlight device and the elastic body of the luminescent key according to the present invention.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, 2, 3 and 4, a light-emitting key 1 according to a preferred embodiment of the present invention is schematically illustrated. Fig. 1 is an external perspective view schematically showing a light-emitting key 1 according to a preferred embodiment of the invention. Fig. 2 schematically shows a light-emitting key 1 according to a preferred embodiment of the present invention in an element-member expanded view. Fig. 3 isbase:Sub>A cross-sectional view along linebase:Sub>A-base:Sub>A of the fig. 2 light-emitting key 1 in an assembled and non-depressed position. Fig. 4 isbase:Sub>A cross-sectional view along linebase:Sub>A-base:Sub>A of the light-emitting key 1 of fig. 2, after assembly and inbase:Sub>A depressed position.
As shown in fig. 1, 2 and 3, the light-emitting key 1 according to the preferred embodiment of the present invention includes a base plate 10, a membrane switch layer 11, a key cap 12, a lifting mechanism 13, a backlight device 14 and at least one elastic body 15.
The base plate 10 has at least one first hole 104. The membrane switch layer 11 has at least one second hole 112. Each second hole 112 corresponds to one first hole 104 of the at least one first hole 104. The membrane switch layer 11 is disposed on the upper surface 100 or the lower surface 102 of the base plate 10, such that each second via 112 is located above or below its corresponding first via 104. In the examples shown in fig. 2, 3 and 4, the membrane switch layer 11 is disposed on the upper surface 100 of the base plate 10.
The keycaps 12 are disposed above the base plate 10 and are capable of vertical movement relative to the base plate 10. The lifting mechanism 13 is disposed between the base plate 10 and the key cap 12. The lift mechanism 13 limits the movement of the key cap 12 between the non-depressed position (shown in fig. 3) and the depressed position (shown in fig. 4). The lifting mechanism 13 includes at least one protrusion 136. Each of the protruding structures 136 corresponds to one of the at least one first hole 104. In the example shown in fig. 2, 3 and 4, the lifting mechanism 13 includes a first connecting member 132 and a second connecting member 134. The first connecting member 132 and the second connecting member 134 are combined into a so-called scissor lift mechanism 13, but the invention is not limited thereto. In the light-emitting key 1 of the present invention, the lifting mechanism 13 may be a butterfly lifting mechanism 13, a magnetic lifting mechanism 13, or the like. It is emphasized that in the examples shown in fig. 3 and 4, the luminescent key 1 according to the invention belongs to a thinned luminescent key 1.
At least one elastic body 15 is formed on the backlight device 14. Each of the resilient bodies 15 corresponds to one of the at least one first hole 104. The backlight device 14 is disposed below the bottom plate 10, such that each elastic body 15 is disposed in the corresponding first hole 104 and the corresponding second hole 112. In the example shown in fig. 2, two elastic bodies 15 are shown as a representative.
In one embodiment, the at least one elastic body 15 may be formed of an ultraviolet curable resin, a water gel, a silicone gel, or other commercially available polymer materials with high elastic modulus.
As shown in fig. 4, when the key cap 12 is located at the pressing position, each protruding structure 136 extends into its corresponding first hole 104 and its corresponding second hole 112, and compresses the elastic body 15 disposed in its corresponding hole. Thus, when the key cap 12 is pressed, the elastic body 15 can absorb the impact energy of the lifting mechanism 13, thereby eliminating noise and improving the feedback of the pressing touch.
In one embodiment, the top view of the elastic body 15 may be circular, oval, rectangular, etc. In one example, the top view of the elastic body 15 is circular, the height of the elastic body 15 is 0.25mm, and the diameter of the elastic body 15 is 2.00mm.
In the present invention, the light-emitting key 1 includes a bottom plate 10, a thin film switch layer 11, a key cap 12, a lifting mechanism 13, a backlight device 14, and at least one elastic body 15. The bottom plate 10 has at least one first hole 104; the membrane switch layer 11 is arranged on the upper surface or the lower surface of the bottom plate 10; the keycap 12 is arranged above the base plate 10, and the keycap 12 can vertically move relative to the base plate 10; the lifting mechanism 13 is disposed between the base plate 10 and the key cap 12, and the lifting mechanism 13 restricts the movement of the key cap 12 between the non-pressed position and the pressed position. The lifting mechanism 13 comprises at least one protrusion structure 136; at least one elastic body 15 is formed on the backlight device 14, and the at least one elastic body 15 corresponds to the at least one protrusion structure 136. Wherein, when the keycap 12 is located at the pressing position, the at least one protruding structure 136 penetrates through the base plate 10 and the membrane switch layer 11 and compresses the at least one elastic body 15 on the backlight device 14.
Referring to fig. 5, fig. 5 is a partial cross-sectional view of a backlight device 14 and an elastic body 15 of the light-emitting key 1 according to an embodiment of the invention.
As shown in fig. 5, in one embodiment, the backlight device 14 includes a light guide plate 140, a reflector 142 and a light shielding film 143. The light guide plate 140 has a front surface 1402 and a back surface 1404. The reflector 142 is disposed on the back 1404 of the light guide plate 140. The light shielding film 143 has at least one third hole 1434. Each resilient body 15 corresponds to one of the at least one third break 1434. At least one elastic body 15 is formed on the front surface 1402 of the light guide plate 140. The light shielding films 143 are disposed on the front surface 1402 of the light guide plate 140 such that each of the elastic bodies 15 passes through its corresponding third broken hole 1434.
In one embodiment, the light guide plate 140 may be made of acryl, silicone, thermoplastic Polyurethane (TPU), or other commercial polymer materials with good light guiding property.
In one embodiment, the reflective sheet 142 may be formed of a white polyester film, but the invention is not limited thereto.
In the above embodiment, the light of the light guide plate 140 corresponding to the region of the at least one elastic body 15 is not utilized because it is shielded by the at least one elastic body 15, and in order to reduce the light guide energy loss of the region, as also shown in fig. 5, further, at least one non-light guide region 1406 is defined on the back 1404 of the light guide plate 140. Each of the non-light guiding regions 1406 corresponds to one of the at least one elastic body 15, and is located below the corresponding elastic body 15. The backlight 14 also includes a plurality of light turning structures 144. The light diverting structures 144 are formed on the back 1404 of the light guide plate 140 except for at least one unlighted region 1406. The backlight 14 also includes a plurality of light emitting elements 146. In the example shown in fig. 2, the plurality of light emitting elements 146 are disposed adjacent to a side surface of the light guide plate 140 (the light guide plate 140 is not labeled in fig. 2), and light emitted by the plurality of light emitting elements 146 is incident into the light guide plate 140 from the side surface of the light guide plate 140, but the invention is not limited thereto. The placement of the light emitting elements 146 can have many different designs, which are not described herein. The light emitted from the plurality of light emitting elements 146 is incident into the light guide plate 140. The plurality of light redirecting structures 144 are configured to direct light directed toward the plurality of light redirecting structures 144 toward the front 1402 of the light guide plate 140. The plurality of light redirecting structures 144 may be formed by printing a light-colored (e.g., white) dot ink on the back surface 1404 of the light guide plate 140, may be micro-structures (micro-lenses), or may be integrally formed with the light guide plate 140 by plating. However, the formation of the plurality of light redirecting structures 144 is not limited to the above-described process.
Referring to fig. 6, fig. 6 is a partial cross-sectional view of another embodiment of the backlight device 14 and the elastic body 15 of the light-emitting key 1 according to the present invention.
As shown in fig. 6, in another embodiment, the backlight device 14 includes a light guide plate 140, a reflector 142 and a light shielding film 143. The light guide plate 140 has a front surface 1402 and a back surface 1404. The reflective sheet 142 is disposed on the back surface 1404 of the light guide plate 140. The light shielding film 143 is disposed on the front surface 1402 of the light guide plate 140. At least one elastic body 15 is formed on the light shielding film 143.
In the above embodiments, also in order to reduce the light guiding energy loss of the light guiding plate 140, as shown in fig. 6, at least one non-light guiding region 1406 is further defined on the back surface 1404 of the light guiding plate 140. Each of the non-light guiding regions 1406 corresponds to one of the elastic bodies 15, and is located below the corresponding elastic body 15. The backlight 14 also includes a plurality of light turning structures 144. The light diverting structures 144 are formed on the back 1404 of the light guide plate 140 except for at least one unlighted region 1406. Similarly, the light emitted from the light emitting elements 146 is incident into the light guide plate 140 and is guided by the light guide plate 140. The plurality of light redirecting structures 144 are configured to direct light directed toward the plurality of light redirecting structures 144 toward the front 1402 of the light guide plate 140.
In the above embodiment, also in order to reduce the light guiding energy loss of the light guiding plate 140, as shown in fig. 6, the light shielding film 143 further has a top surface 1430 and a bottom surface 1432. The top surface 1430 of the light-shielding film 143 defines at least one light-shielding region 1436. Each light-shielding region 1436 corresponds to one elastic body 15 of the at least one elastic body 15 and is located below the corresponding elastic body 15. The bottom surface 1432 of the light shielding film 143 defines at least one light reflecting area 1437. Each light reflection region 1437 corresponds to one elastic body 15 of the at least one elastic body 15 and is located below the corresponding elastic body 15. The backlight device 14 further comprises at least one light-shielding film 147 and at least one light-reflecting film 148. Each light-shielding film 147 corresponds to one light-shielding region 1436 of the at least one light-shielding region 1436, and is formed on the light-shielding region 1436 corresponding thereto. The at least one light-shielding film 147 is used to shield light emitted to the at least one light-shielding film 147. Each retroreflective film 148 corresponds to one retroreflective region 1437 of the at least one retroreflective region 1437 and is formed on its corresponding retroreflective region 1437. The at least one reflective film 148 is used for reflecting light rays emitted to the at least one reflective film 148. The at least one light-shielding film 147 may be formed by coating black or dark ink, but the present invention is not limited thereto. The at least one light-reflecting film 148 may be formed by coating white or light-colored ink, but the invention is not limited thereto.
Referring to fig. 7, fig. 7 is a partial cross-sectional view of another embodiment of the backlight device 14 and the elastic body 15 of the light-emitting key 1 according to the present invention.
As shown in fig. 7, in another embodiment, the backlight device 14 includes a light guide plate 140, a reflector 142 and a light shielding film 143. The light guide plate 140 has a front surface 1402 and a back surface 1404. The reflector 142 is disposed on the back 1404 of the light guide plate 140. The light shielding film 143 has at least one first protrusion 1438 protruding upward. Each resilient body 15 corresponds to one first projection 1438 of the at least one first projection 1438. The light shielding film 143 may be formed with at least one first protrusion 1438 by a stamping process. At least one elastic body 15 is formed on the front surface 1402 of the light guide plate 140. The light shielding film 143 is disposed on the front surface 1402 of the light guide plate 140 such that each elastic body 15 is sleeved into its corresponding first protrusion 1438.
In the above embodiment, also in order to reduce the light guiding energy loss of the light guiding plate 140, as shown in fig. 7, further, at least one non-light guiding region 1406 is defined on the back surface 1404 of the light guiding plate 140. Each of the non-light guiding regions 1406 corresponds to one of the elastic bodies 15, and is located below the corresponding elastic body 15, and the backlight device 14 further includes a plurality of light diverting structures 144. The light diverting structures 144 are formed on the back 1404 of the light guide plate 140 except for at least one unlighted region 1406. Similarly, the light emitted from the light emitting elements 146 is incident into the light guide plate 140 and is guided by the light guide plate 140. The plurality of light redirecting structures 144 are configured to direct light directed toward the plurality of light redirecting structures 144 toward the front 1402 of the light guide plate 140.
Referring to fig. 8, fig. 8 is a partial cross-sectional view of another embodiment of the backlight device 14 and the elastic body 15 of the light-emitting key 1 according to the present invention.
As shown in fig. 8, in another embodiment, the backlight device 14 includes a light guide plate 140, a reflector 142 and a light shielding film 143. The light guide plate 140 has a front surface 1402 and a back surface 1404. The reflective sheet 142 is disposed on the back surface 1404 of the light guide plate 140. The light shielding film 143 has at least one second protrusion 1439 protruding upward. The at least one second protrusion 1439 serves as the at least one elastic body 15. The light shielding film 143 may be formed with at least one second protrusion 1439 by a stamping process. The light shielding film 143 is disposed on the front surface 1402 of the light guide plate 140.
In the above embodiments, also in order to reduce the light guiding energy loss of the light guiding plate 140, as shown in fig. 8, at least one non-light guiding region 1406 is further defined on the back surface 1404 of the light guiding plate 140. Each of the non-light guiding regions 1406 corresponds to one of the second protrusions 1439 and is located below the corresponding second protrusion 1439. The backlight 14 also includes a plurality of light turning structures 144. The light diverting structures 144 are formed on the back 1404 of the light guide plate 140 except for at least one light non-guiding region 1406. Similarly, the light emitted from the light emitting elements 146 is incident into the light guide plate 140 and is guided by the light guide plate 140. The plurality of light redirecting structures 144 are configured to direct light toward the front surface 1402 of the light guide plate 140 via the plurality of light redirecting structures 144.
Referring to fig. 9, fig. 9 is a partial cross-sectional view of another embodiment of the backlight device 14 and the elastic body 15 of the light-emitting key 1 according to the present invention.
As shown in fig. 9, in another embodiment, the backlight device 14 includes a light guide plate 140, a reflector 142 and a light shielding film 143. The light guide plate 140 has a front surface 1402 and a back surface 1404. At least one elastic body 15 is formed on the front surface 1402 of the light guide plate 140. The reflective sheet 142 is disposed on the back surface 1404 of the light guide plate 140. The light shielding film 143 is disposed on the front surface 1402 of the light guide plate 140 and covers the at least one elastic body 15.
In the above embodiments, also in order to reduce the light guiding energy loss of the light guiding plate 140, as shown in fig. 9, at least one non-light guiding region 1406 is further defined on the back surface 1404 of the light guiding plate 140. Each of the non-light guiding regions 1406 corresponds to one of the at least one elastic body 15 and is located below the corresponding elastic body 15. The backlight 14 also includes a plurality of light turning structures 144. The light diverting structures 144 are formed on the back 1404 of the light guide plate 140 except for at least one unlighted region 1406. Similarly, the light emitted from the light emitting elements 146 is incident into the light guide plate 140 and is guided by the light guide plate 140. The plurality of light redirecting structures 144 are configured to direct light directed toward the plurality of light redirecting structures 144 toward the front 1402 of the light guide plate 140.
In one embodiment, as shown in FIG. 2, the membrane switch layer 11 includes a switch 114. The switch 114 is located below the keycap 12. The light-emitting key 1 according to the preferred embodiment of the present invention further comprises a resilient actuating element 16. The resilient actuating element 16 comprises an actuating post (not shown). The resilient actuation element 16 is disposed between the keycap 12 and the membrane switch layer 11, and is located above the switch 114. When the key cap 12 is pressed and moved to the pressed position, the resilient actuation member 16 is deformed and turned on by the plunger actuation switch 114. When the key cap 12 is released, the resilient actuation element 16 provides the restoring force required to return the key cap 12 to the un-depressed position, and closes the switch 114.
From the above description of the present invention, it can be clearly understood that the light-emitting key according to the present invention does not form a buffer structure on the membrane switch layer relative to the bottom plate, but uses the elastic body formed on the backlight device to help eliminate noise and improve the press touch feedback. The structure of the light-emitting key for eliminating noise according to the present invention can be implemented on a thinned light-emitting key.
The foregoing detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the invention. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. The scope of the invention should, therefore, be determined with reference to the above description, but should not be construed as being limited to the specific embodiments set forth herein.

Claims (11)

1. A light-emitting key, comprising:
the bottom plate is provided with at least one first broken hole;
the membrane switch layer is arranged on the upper surface of the bottom plate so that each second broken hole is positioned above the corresponding first broken hole or arranged on the lower surface of the bottom plate so that each second broken hole is positioned below the corresponding first broken hole;
the keycap is arranged above the bottom plate and can vertically move relative to the bottom plate;
the lifting mechanism is arranged between the base plate and the keycap and limits the keycap to move between an unpressed position and a pressed position, the lifting mechanism comprises at least one protruding structure, and each protruding structure corresponds to one second broken hole in the at least one second broken hole;
a backlight device; and
at least one elastic body formed on the backlight device, each elastic body corresponding to one of the first broken holes, wherein the backlight device is arranged below the bottom plate so that each elastic body is arranged in the corresponding first broken hole and the corresponding second broken hole,
when the keycap is located at the pressing position, each protruding structure extends into the corresponding first broken hole and the corresponding second broken hole and compresses the corresponding elastic body.
2. The illuminated key of claim 1, wherein the backlight assembly comprises:
a light guide plate having a front surface and a back surface;
a light reflecting sheet disposed on the back surface of the light guide plate; and
the light shielding film is provided with at least one third broken hole, each elastic body corresponds to one third broken hole in the at least one third broken hole, the at least one elastic body is formed on the front surface of the light guide plate, and the light shielding film is arranged on the front surface of the light guide plate so that each elastic body penetrates through the corresponding third broken hole.
3. The illuminated key of claim 1, wherein the backlight assembly comprises:
a light guide plate having a front surface and a back surface;
a light reflecting sheet disposed on the back surface of the light guide plate; and
and the shading membrane is arranged on the front surface of the light guide plate, wherein the at least one elastomer is formed on the shading membrane.
4. The illuminated key of claim 3, wherein the back surface of the light guide plate defines at least one non-light guiding region, each non-light guiding region corresponds to one of the at least one elastic body and is located under the corresponding elastic body, the backlight device further comprises a plurality of light diverting structures formed on other regions of the back surface of the light guide plate except the at least one non-light guiding region, the plurality of light diverting structures are configured to direct light directed toward the plurality of light diverting structures toward the front surface of the light guide plate.
5. The light-emitting key as claimed in claim 4, wherein the light-shielding film has a top surface and a bottom surface, the top surface of the light-shielding film defines at least one light-shielding region, each light-shielding region corresponds to and is located under one of the at least one elastic body, the bottom surface of the light-shielding film defines at least one light-reflecting region, each light-reflecting region corresponds to and is located under one of the at least one elastic body, the backlight device further comprises at least one light-shielding film and at least one light-reflecting film, each light-shielding film corresponds to and is formed on one of the at least one light-shielding regions, and each light-reflecting film corresponds to and is formed on one of the at least one light-reflecting region.
6. The illuminated key of claim 1, wherein the backlight assembly comprises:
a light guide plate having a front surface and a back surface;
a light reflecting sheet disposed on the back surface of the light guide plate; and
the light shielding film is provided with at least one first protruding part protruding upwards, each elastic body corresponds to one first protruding part of the at least one first protruding part, the at least one elastic body is formed on the front surface of the light guide plate, and the light shielding film is arranged on the front surface of the light guide plate so that each elastic body is sleeved in the corresponding first protruding part.
7. The illuminated key of claim 1, wherein the backlight assembly comprises:
a light guide plate having a front surface and a back surface;
a light reflecting sheet disposed on the back surface of the light guide plate; and
the shading film is provided with at least one second protruding part protruding upwards, the at least one second protruding part serves as the at least one elastic body, and the shading film is arranged on the front face of the light guide plate.
8. The illuminated key of claim 7, wherein the back surface of the light guide plate defines at least one non-light guiding region, each non-light guiding region corresponds to one of the at least one second protrusion and is located below the corresponding second protrusion, the backlight device further comprises a plurality of light-turning structures formed on other regions of the back surface of the light guide plate except the at least one non-light guiding region, the plurality of light-turning structures are configured to guide light emitted toward the plurality of light-turning structures to the front surface of the light guide plate.
9. The illuminated key of claim 1, wherein the backlight device comprises:
the light guide plate is provided with a front surface and a back surface, and the at least one elastomer is formed on the front surface of the light guide plate;
a light reflecting sheet disposed on the back surface of the light guide plate; and
and the shading film is arranged on the front surface of the light guide plate and covers the at least one elastic body.
10. The illuminated key according to claim 2, 6 or 9, wherein the back surface of the light guide plate defines at least one non-light guiding region, each non-light guiding region corresponding to one of the at least one elastic body and being located under the corresponding elastic body, the backlight device further comprises a plurality of light-turning structures formed on other regions of the back surface of the light guide plate except the at least one non-light guiding region, the plurality of light-turning structures being configured to direct light directed toward the plurality of light-turning structures toward the front surface of the light guide plate.
11. A light-emitting key, comprising:
the bottom plate is provided with at least one first broken hole;
the membrane switch layer is arranged on the upper surface or the lower surface of the bottom plate;
the keycap is arranged above the bottom plate and can vertically move relative to the bottom plate;
the lifting mechanism is arranged between the base plate and the keycap, the lifting mechanism limits the keycap to move between an unpressed position and a pressed position, and the lifting mechanism comprises at least one protruding structure;
a backlight device; and
at least one elastic body formed on the backlight device, the at least one elastic body corresponding to the at least one protruding structure,
when the keycap is located at the pressing position, the at least one protruding structure penetrates through the bottom plate and the thin film switch layer and compresses the at least one elastic body on the backlight device.
CN202110642027.0A 2021-06-09 2021-06-09 Luminous key Pending CN115458356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110642027.0A CN115458356A (en) 2021-06-09 2021-06-09 Luminous key

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110642027.0A CN115458356A (en) 2021-06-09 2021-06-09 Luminous key

Publications (1)

Publication Number Publication Date
CN115458356A true CN115458356A (en) 2022-12-09

Family

ID=84294757

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110642027.0A Pending CN115458356A (en) 2021-06-09 2021-06-09 Luminous key

Country Status (1)

Country Link
CN (1) CN115458356A (en)

Similar Documents

Publication Publication Date Title
US9214301B2 (en) Luminous keyboard device
CN111508753B (en) Backlight module and luminous keyboard
US9213416B2 (en) Illuminated keyboard
US8581127B2 (en) Key structure with scissors-type connecting member
US11048336B2 (en) Luminous keyboard
EP2439759A1 (en) Illuminated keyboard
US20120286976A1 (en) Illuminated keyboard
EP2437276A1 (en) Illuminated keyboard
US9142370B2 (en) Illuminated keyboard
TW201316368A (en) Illuminating keyboard
US10020139B2 (en) Key structure
US20130114287A1 (en) Illuminated keyboard
CN103515135A (en) Thin keyboard
US8536476B2 (en) Illuminated keyboard
CN115458356A (en) Luminous key
US10242820B1 (en) Luminous keyboard
US20190148091A1 (en) Luminous keyboard
JP2012089135A (en) Light emission keyboard
TWI763537B (en) Illuminated keyswitch
TWI768897B (en) Illuminated keyswitch
JPH06275169A (en) Keyboard switch
US20180143698A1 (en) Keyboard
KR100689393B1 (en) Key pad assembly
CN215220579U (en) Thin type key
CN115410851A (en) Luminous key

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination