CN113936948A

CN113936948A - Self-light-guiding interlayer sheet type luminous key core module

Info

Publication number: CN113936948A
Application number: CN202111376009.9A
Authority: CN
Inventors: 丁进新; 张家文; 林懋瑜
Original assignee: Shenzhen Shenshan Special Cooperation Zone Huichuangda Electronic Intelligent Technology Co ltd
Current assignee: Shenzhen Shenshan Special Cooperation Zone Huichuangda Electronic Intelligent Technology Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-01-14

Abstract

The invention discloses a self-light-guiding interlayer sheet type light-emitting key core module, which comprises a supporting structure, an insulating layer, a circuit layer, a partition sheet layer, a light-guiding film, a composite film, an elastic conducting piece, an LED lamp and a key cap, wherein a switch is arranged on the circuit layer corresponding to the position of the key cap, a first through hole is arranged on the partition sheet layer corresponding to the position of the key cap, the elastic conducting piece is arranged corresponding to the position of the first through hole, a conducting sheet is fixedly arranged below the light-guiding film corresponding to the position of the elastic conducting piece, the conducting sheet is arranged corresponding to the first through hole, a light-guiding net point is arranged on the light-guiding film corresponding to the position of the key cap, a second through hole is arranged on the composite film corresponding to the position of the key cap, the LED lamp is arranged on the circuit layer and corresponding to the position of the key cap, a third through hole is arranged on the partition sheet layer corresponding to the position of the LED lamp, a fourth through hole is arranged on the light-guiding film corresponding to the position of the LED lamp, the LED lamp is installed in third through-hole and fourth through-hole, and the key cap setting switches on the piece top at the elasticity.

Description

Self-light-guiding interlayer sheet type luminous key core module

Technical Field

The invention relates to a key core module, in particular to a self-light-guiding interlayer sheet type light-emitting key core module which is applied to the field of computer accessories.

Background

At present, the keyboard is the most common and the most main input device, and English letters, Chinese characters, numbers, punctuations and the like can be input into a computer through the keyboard, so that commands, data input and the like are sent to the computer. It can be said that since the date of computer generation, keyboards are one of the essential peripherals of computers.

Along with the continuous development of keyboard, in order to make the keyboard have better result of use, luminous keyboard (or called as keyboard in a poor light) just should be transported and come, and it designs into light-transmitting structure with the key cap, utilizes the illumination bright key cap that backlight unit sent, more is applicable to the input use at night on the one hand, conveniently sees the word on the key cap clearly, and on the other hand also can produce the cool effect more. The luminous keyboard structure among the prior art all sets up a backlight unit in that the keyboard is inside, gives out light through backlight unit, illuminates the key cap, and backlight unit generally includes that photomask, leaded light membrane, reflectance coating and LED constitute, and photomask, leaded light membrane and reflectance coating are range upon range of and are set up, and LED sets up in leaded light membrane side, and the light that LED sent is penetrated in the leaded light membrane, leads to each key cap department through the leaded light membrane and passes through to illuminate the key cap. The current common backlight keyboard has the inherent disadvantages due to the structural limitation: (1) due to the limitation of the backlight module, especially the LEDs in the backlight module, the thickness of the whole backlight module is more than 0.5mm, so that the light and thin of the whole keyboard are influenced; (2) the structure that it adopted leaded light membrane cooperation LED to give out light, then its LED need select to adopt high-power high bright LED, high-power high bright LED can cause its consumption too high on the one hand, cause power consumptive height, on the other hand, high-power high bright LED calorific capacity is very high in the use, because LED only sets up one or several, it is concentrated to generate heat, can cause the radiating effect not good, keyboard local heating scheduling problem, influence customer's use experience, especially when it is used in notebook computer, still can influence notebook computer's self radiating effect.

Disclosure of Invention

Aiming at the defects of thicker thickness, high power consumption and poor heat dissipation of the light-emitting keyboard in the prior art which are mentioned above, the invention provides a self-light-guiding sandwich-layer-type light-emitting key core module which adopts a specially-made light-emitting key core module and directly illuminates a key cap area by using an LED (light-emitting diode) arranged corresponding to the key cap so as to solve the problems.

The technical scheme adopted by the invention for solving the technical problems is as follows: a self-light-conducting sandwich-type luminous key core module comprises a supporting structure, an insulating layer, a circuit layer, a partition layer, a light-conducting film, a composite film, an elastic conducting piece, an LED lamp and a key cap, wherein the insulating layer is arranged on the supporting structure, the circuit layer is arranged on the insulating layer, a switch is arranged on the circuit layer corresponding to the position of the key cap, the partition layer is arranged above the insulating layer, a first through hole is formed in the partition layer corresponding to the position of the key cap, the elastic conducting piece is arranged corresponding to the position of the first through hole, the light-conducting film is arranged above the partition layer, a conducting piece is fixedly arranged below the light-conducting film corresponding to the position of the elastic conducting piece, the conducting piece is arranged corresponding to the first through hole, a light-conducting dot is arranged on the light-conducting film corresponding to the position of the key cap, the elastic conducting piece is arranged on the light-conducting film, the composite film is arranged above the light-conducting film, a second through hole is arranged at the position of the composite film corresponding to the key cap, the LED lamp is installed on the circuit layer, and is located to set up corresponding to the key cap, has seted up the third through-hole corresponding to LED lamp position department on the separation piece layer, has seted up the fourth through-hole corresponding to LED lamp position department on the leaded light membrane, and the LED lamp is installed in third through-hole and fourth through-hole, and the key cap setting is in elasticity conduction piece top.

Furthermore, the support structure adopts a steel sheet, and the thickness of the steel sheet is 0.10-0.25 mm.

Furthermore, the insulating layer is fixedly installed with the supporting structure by adopting an adhesive layer, and the thickness of the insulating layer is 0.02 mm-0.05 mm.

Furthermore, the thickness of the spacer layer is 0.02-0.07 mm.

Furthermore, the thickness of the light guide film is 0.08-0.12 mm.

Furthermore, the thickness of the composite film is 0.020-0.30 mm.

Furthermore, 1-4 LEDs can be arranged at the position corresponding to each keycap.

Furthermore, a scissor pin is arranged between the keycap and the elastic conduction piece, and the keycap and the scissor pin are respectively arranged on the steel sheet.

Furthermore, the steel sheet is provided with mounting holes corresponding to the positions of the scissor feet, and the scissor feet are inserted into the mounting holes.

Further, the mounting holes are four, and openings between the two mounting holes are opposite or oppositely arranged.

The invention has the beneficial effects that: the invention provides a self-light-guiding sandwich-sheet type light-emitting key core module, which utilizes an LED (light-emitting diode) arranged corresponding to a key cap to directly illuminate a key cap area, thereby omitting a backlight module structure, reducing the thickness of a keyboard as a whole and being more beneficial to the light and thin design of the keyboard; on the other hand, adopt LED directly to illuminate the key cap district, LED can select for use low-power consumption component, not only is favorable to reducing the consumption on the whole, still can reduce its self calorific capacity, simultaneously, because LED adopts distributed design, be favorable to the heat dissipation more, especially use in notebook computer, can also give off through the supplementary heat that produces notebook self (mainly CPU) of keyboard.

Drawings

Fig. 1 is a schematic structural diagram of a partially exploded solid state of a single keycap of a self-light-guiding sandwich-sheet type light-emitting key core module provided by the invention;

FIG. 2 is a schematic diagram of a partially exploded cross-sectional structure of a single key cap of a self-light-guiding sandwich-type light-emitting key core module according to the present invention;

FIG. 3 is a schematic top view of a single key cap of a self-light-guiding sandwich-type light-emitting key core module according to the present invention;

fig. 4 is a schematic structural diagram of a partial steel sheet of a single keycap of the self-light-guiding sandwich-sheet type light-emitting key core module provided by the invention.

Reference numerals: 1-steel sheet, 2-adhesive layer, 3-insulating layer, 4-circuit layer, 5-separator layer, 6-light guide film, 7-composite film, 8-scissor feet, 9-keycap and 10-mounting hole. 11-elastic conducting piece, 12-LED lamp, 13-switch, 14-conducting strip, 15-first through hole, 16-second through hole, 17-third through hole, 18-fourth through hole and 19-projection.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-4, the key core module of the present invention comprises a supporting structure, an insulating layer 3, a circuit layer 4, a spacer layer 5, a light guiding film 6, a composite film 7, an elastic conductive member 11, an LED lamp 12 and a key cap 9, wherein the insulating layer 3 is disposed on the supporting structure, the circuit layer 4 is disposed on the insulating layer 3, a switch 13 is disposed on the circuit layer 4 corresponding to the key cap 9, the spacer layer 5 is disposed above the insulating layer 3, a first through hole 15 is disposed on the spacer layer 5 corresponding to the key cap 9, the elastic conductive member 11 is disposed corresponding to the first through hole 15, the light guiding film 6 is disposed above the spacer layer 5, a conductive sheet 14 is fixedly disposed below the conductive sheet 6 corresponding to the conductive sheet 11, the conductive sheet 14 is disposed corresponding to the first through hole 15, and a light guiding dot (which can be coated, or coated) is disposed on the light guiding film 6 corresponding to the key cap 9, Silk screen printing, dot printing, conventional modes such as UV glue or impression generate), can make the illumination that LED lamp 12 sent go into in leaded light membrane 6, jet out from leaded light dot department again, thereby illuminate key cap 9, elasticity switches on 11 and installs on leaded light membrane 6, leaded light membrane 6 top is provided with complex film 7 (because it has two kinds of functions of reflection and shading, so define it as the complex film), complex film 7 sets up second through-hole 16 corresponding to key cap 9 position department, LED lamp 12 is installed on circuit layer 4, and set up corresponding to key cap 9 department, third through-hole 17 has been seted up corresponding to LED lamp 12 position department on the spacer layer 5, fourth through-hole 18 has been seted up corresponding to LED lamp 12 position department on the leaded light membrane 6, LED lamp 12 is installed in third through-hole 17 and fourth through-hole 18, key cap 9 sets up in elasticity switches on 11 top. In this embodiment, the conductive sheet 14 is formed on the light guiding film 6 by coating with silver paste, in this embodiment, the elastic conducting member 11 is an elastic sheet, which may also be called a rubber dome or a dome sheet, and in specific implementation, a rubber or silicone key form may also be used, which mainly plays roles of elastic support and hand feeling enhancement. In this embodiment, insulating layer 3 chooses polyimide insulating material for use and makes for adhering to and fixed line layer 4 uses, and during the concrete implementation, insulating layer 3 and line layer 4 also can adopt other circuit board structures among FPC structure or the prior art, and insulating layer 3 also can choose for use other insulating materials that can adapt to adhere to line layer 4 to make. The thickness of the insulating layer 3 is 0.02 mm-0.05 mm, and the requirement of the circuit layer 4 for adhesion is met. In this embodiment, the circuit layer 4, i.e., the copper foil circuit, is attached to the insulating layer 3 and may be formed by a conventional circuit board processing process such as etching, silk-screen printing or pasting, the circuit structure of the circuit layer 4 is a conventional keyboard circuit and a conventional LED lamp driving circuit structure, which are not limited in the present invention, and a switch 13, i.e., a keyboard key switch, is disposed on the circuit layer 4 at a position corresponding to the key cap, and the switch 13 has the same structure as a conventional keyboard.

In the embodiment, the support structure adopts the steel sheet 1, and the thickness of the steel sheet is 0.10 mm-0.25 mm. Not only can meet the strength requirement, but also can not make the whole body too thick. When the invention is applied to a scissor-foot type keyboard, the steel sheet 1 is also provided with a mounting structure, such as: the mounting holes, the hooks and the like are used for mounting scissors feet, key caps and the like, and the mounting structure of the keyboard is the same as that of a conventional keyboard structure and is not described again.

In this embodiment, the insulating layer 3 is fixedly mounted with the supporting structure by using the adhesive layer 2, and the thickness of the insulating layer 3 is 0.02mm to 0.05 mm. The adhesive layer 2 is preferably thermosetting adhesive, so that the processing is convenient, materials such as adhesive sticker can be selected during specific implementation, the thickness of the adhesive layer 2 can be ignored, and only the bonding requirement is met. Or, during production and processing, the adhesive layer 2 is not arranged, and other fixing structures are selected to fixedly install the insulating layer 3 and the steel sheet 1 together, or the insulating layer 3 is directly arranged on the steel sheet 1.

In the embodiment, the thickness of the spacer layer 5 is 0.02-0.07 mm. The spacer layer 5 is made of PET (polyethylene terephthalate), preferably 0.05mm, and mainly plays a role in insulation, and in particular, other materials with insulating property can be used.

In this embodiment, the thickness of the light guide film 6 is 0.08-0.12 mm. The light guide film 6 is made of PET (polyethylene terephthalate), preferably 0.10mm, and other materials may be used in specific implementation.

In this embodiment, the thickness of the composite film 7 is 0.020-0.30 mm. Preferably 0.025mm, and in particular embodiments, other materials may be used. 7 lower floors of complex film are provided with white printing ink, be used for the reflection of light, can make during the light reflection of upwards that LED lamp 12 sent goes back leaded light membrane 6, in order to strengthen its luminance, 7 upper strata of complex film are provided with black printing ink, be used for the shading, in order to prevent other regional printing opacity that remove the key cap 9 position, influence the whole result of use of keyboard, in this embodiment, white printing ink and black printing ink adopt the printing mode to set up on complex film 7, during concrete implementation, also can choose other mode settings for use, if: spraying, silk-screen printing and the like. The composite film 7 is not provided with ink at the position corresponding to the keycap 9, so that light in the light guide film 6 can be emitted from the position to illuminate the keyboard keys. During specific implementation, composite film 7 also can select for use self to be white membrane, at top layer printing black ink, perhaps selects for use self to be black membrane, at bottom layer printing white ink, and has seted up the through-hole corresponding to key cap 9 position department to make light pass through.

In this embodiment, 1 to 4 LEDs may be disposed at positions corresponding to each keycap 9. Generally, 1 or 2 LED lamps 12 can be arranged on a common key, and 2-4 LED lamps 12 are correspondingly arranged on larger and longer keys such as 'enter', 'shift', 'blank', and the like, so that the illumination requirement is met, and more LEDs can be arranged corresponding to one keycap according to the actual requirement. No LEDs may be provided under key caps that do not need to be illuminated.

In this embodiment, the scissors feet 8 are installed between the key cap 9 and the elastic conduction piece 11, and the key cap 9 and the scissors feet 8 are respectively installed on the steel sheet 1. Press key cap 9, extrude scissors foot 8 through key cap 9, continue to push down then press elasticity and switch on a 11, elasticity switches on 11 and takes place deformation, elasticity switches on 11 and pushes down complex film 7 and leaded light membrane 6, 7 leaded light membranes of complex film 6 take conducting strip 14 downstream together, see through first through-hole 15 on the spacer layer 5, 14 contact switch of conducting strip 13, switch on it, in order to realize the button effect, loosen key cap 9, scissors foot 8 and elasticity switch on 11 kick-backs, 14 break away from switch 13 of conducting strip, break off it.

In the embodiment, the stability of the scissor legs 8 is ensured, the steel sheet 1 is provided with mounting holes 10 corresponding to the scissor legs 8, and the scissor legs 8 are inserted into the mounting holes 10. Scissor feet 8 are inserted in the mounting holes 10, so that the scissor feet 8 are connected with the steel sheet 1 in the rebounding process, the stability of a single key is improved, an upward protruding part 19 is arranged on the edge of the mounting hole 10, the protruding part 19 of the mounting hole 10 supports the scissor feet 8, and the stability of the single key in use is improved

In this embodiment, when the scissors are installed, the four mounting holes 10 are arranged, two mounting holes 10 under the same horizontal line form a group, and openings between the two mounting holes 10 are arranged oppositely or oppositely, so that the scissors pins 8 are clamped in the group of mounting holes 10, the fastening type of the scissors pins is increased, and the scissors pins 8 are prevented from falling off.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims

1. A self-light-guide interlayer sheet type luminous key core module is characterized by comprising a support structure, an insulating layer (3), a circuit layer (4), a spacer layer (5), a light guide film (6), a composite film (7), an elastic conducting piece (11), an LED lamp (12) and a key cap (9), wherein the insulating layer (3) is arranged on the support structure, the circuit layer (4) is arranged on the insulating layer (3), a switch (13) is arranged on the circuit layer (4) corresponding to the position of the key cap (9), the spacer layer (5) is arranged above the insulating layer (3), a first through hole (15) is arranged on the spacer layer (5) corresponding to the position of the key cap (9), the elastic conducting piece (11) is arranged corresponding to the position of the first through hole (15), the light guide film (6) is arranged above the spacer layer (5), a conducting sheet (14) is fixedly arranged below the light guide film (6) corresponding to the position of the elastic conducting piece (11), conducting strip (14) set up corresponding to first through-hole (15), be provided with the leaded light site corresponding to key cap (9) position department on leaded light membrane (6), elasticity switches on piece (11) and installs on leaded light membrane (6), leaded light membrane (6) top is provided with complex film (7), complex film (7) set up second through-hole (16) corresponding to key cap (9) position department, install on circuit layer (4) LED lamp (12), and set up corresponding to key cap (9) department, third through-hole (17) have been seted up corresponding to LED lamp (12) position department on the separation lamella (5), fourth through-hole (18) have been seted up corresponding to LED lamp (12) position department on leaded light membrane (6), install in third through-hole (17) and fourth through-hole (18) LED lamp (12), key cap (9) set up in elasticity switches on piece (11) top.

2. The light-emitting key core module of the self-light-guiding sandwich plate type as claimed in claim 1, wherein the support structure is a steel plate (1), and the thickness of the steel plate (1) is 0.10mm to 0.25 mm.

3. The sandwich plate type luminous key core module of claim 1, wherein the insulating layer (3) is fixedly mounted with the supporting structure by the adhesive layer (2), and the thickness of the insulating layer (3) is 0.02mm to 0.05 mm.

4. The light-emitting key chip module of the sandwich plate type as claimed in claim 1, wherein the thickness of the spacer layer (5) is 0.02-0.07 mm.

5. The sandwich plate type light-emitting key core module of claim 1, wherein the light guiding film (6) has a thickness of 0.08-0.12 mm.

6. The keypad module of claim 1, wherein the composite film (7) has a thickness of 0.020-0.30 mm.

7. The light-emitting key core module of the sandwich plate type of self-light guide as claimed in claim 1, wherein 1-4 LEDs are disposed at the position corresponding to each key cap (9).

8. The light-emitting key core module of self-light-guiding sandwich plate type as claimed in claim 2, wherein a scissor pin (8) is installed between the key cap (9) and the elastic conducting piece (11), and the key cap (9) and the scissor pin (8) are respectively installed on the steel plate (1).

9. The self-light-guide sandwich plate type luminous key core module as claimed in claim 8, wherein the steel plate (1) is provided with mounting holes (10) corresponding to the scissor legs (8), and the scissor legs (8) are inserted into the mounting holes (10).

10. A self-leaded sandwich chip type luminous key core module as set forth in claim 9, wherein the number of the mounting holes (10) is four, and the openings between the two mounting holes (10) are oppositely arranged.