CN114242500B

CN114242500B - Keyboard and electronic equipment that can give out light

Info

Publication number: CN114242500B
Application number: CN202210174431.4A
Authority: CN
Inventors: 李海涛; 王晓光; 霍国亮
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2023-03-14
Anticipated expiration: 2042-02-25
Also published as: CN114242500A; WO2023160125A1

Abstract

The application provides a keyboard and an electronic device capable of emitting light. The keyboard that can give out light includes: the film circuit board, the keycap, the transparent elastic piece and the light-emitting device; the keycaps and the light-emitting devices are respectively positioned on two sides of the thin film circuit board in the thickness direction; the key cap has a light-transmitting portion, the key cap being movable in a thickness direction of the thin-film circuit board with respect to the thin-film circuit board to switch between a pressed position and a released position; the elastic piece is abutted between the keycap and the film circuit board and comprises a trigger part; the thin film circuit board comprises a light-transmitting substrate and a light-transmitting switch, and the switch is arranged on the substrate and is opposite to the trigger part; at least part of the light generated by the light emitting device passes through the switch and the elastic component and is emitted into the light transmission part; wherein, at the pressed position of the keycap, the trigger part is contacted with the film circuit board to trigger the switch; in the released position of the key cap, the trigger portion is spaced apart from the membrane circuit board. In the keyboard of the application, the backlight effect is good.

Description

Keyboard and electronic equipment that can give out light

Technical Field

The present application relates to the field of electronic technologies, and in particular, to a keyboard and an electronic device capable of emitting light.

Background

Due to its portability and powerful processing power, notebook computers have become the most important office tool in everyday life. In order to improve the good visual experience of the keyboard in the notebook computer and facilitate the user to accurately press the position of the keycap in the environment with poor illumination so as to avoid input errors, the keyboard can also have the light-emitting function. For the keyboard capable of emitting light, the light refracted to the keycap of the keyboard is weak, so that the brightness of characters on the keycap is uneven, the characters are not displayed clearly, the backlight effect of the keycap is poor, and the false triggering operation of a user is easily caused.

In the related art, the problem of poor backlight effect of the keyboard is generally solved by increasing the number of the light emitting devices. However, the overall layout of the keyboard needs to be adjusted, which results in a thicker keyboard and is not favorable for the slim design of the electronic device.

Disclosure of Invention

The embodiment of the application provides a keyboard and electronic equipment that can give out light, under the prerequisite that does not increase the thickness of keyboard, can improve the effect of being shaded of keyboard, improves the printing opacity effect of printing opacity portion on the key cap to improve the effect of being shaded of keyboard.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, an embodiment of the present application provides a keyboard capable of emitting light, including: the film circuit board, the keycap, the transparent elastic piece and the light-emitting device are arranged on the transparent elastic piece; the keycaps and the light-emitting devices are respectively positioned on two sides of the thin film circuit board in the thickness direction; the key cap has a light-transmitting portion, the key cap being movable in a thickness direction of the thin-film circuit board with respect to the thin-film circuit board to switch between a pressed position and a released position; the elastic piece is abutted between the keycap and the film circuit board and comprises a triggering part; the thin film circuit board comprises a light-transmitting substrate and a light-transmitting switch, and the switch is arranged on the substrate and is opposite to the trigger part; at least part of the light generated by the light-emitting device passes through the switch and the elastic part and is incident into the light-transmitting part; wherein, at the pressed position of the keycap, the trigger part is contacted with the film circuit board to trigger the switch; in the released position of the key cap, the trigger portion is spaced apart from the membrane circuit board.

In the keyboard of this application embodiment, the base plate printing opacity to the switch that corresponds with the key cap is also printing opacity, so, under the prerequisite that does not increase luminescent device's quantity, can be favorable to more light to propagate the key cap, the light of reinforcing key cap department improves the homogeneity of key cap department light, thereby improves the effect of being shaded of keyboard.

In some embodiments provided by the first aspect of the present application, the thin film wiring board comprises: a first circuit trace and a second circuit trace. The first circuit wire is arranged on the substrate and comprises a first conductive contact; the second circuit is arranged on the substrate and spaced from the first circuit, the second circuit comprises a second conductive contact, the first conductive contact and the second conductive contact form a switch, and the first conductive contact and the second conductive contact form electrical conduction at the pressed position of the keycap.

In some embodiments provided by the first aspect of the present application, the thin film circuit board includes a first insulating thin film layer, the first circuit trace and the second circuit trace are both formed on a surface of the first insulating thin film layer facing the keycap; the triggering portion is provided with a light-transmitting conductive portion, and the conductive portion is contacted with the first conductive contact and the second conductive contact to form electric conduction at the pressed position of the keycap. The structure is simple and the processing is convenient.

In some embodiments provided by the first aspect of the present application, the conductive portion is a conductive layer attached to at least a portion of a surface of the trigger portion facing the switch.

In some embodiments provided in the first aspect of the present application, the conductive layer is made of silver nanowires and/or graphene.

In some embodiments provided by the first aspect of the present application, the conductive portion is defined by at least a portion of the trigger portion. Therefore, the structure is simple, and the cost is low.

In some embodiments provided in the first aspect of the present application, the triggering portion includes a main body portion abutting against the key cap, and an abutting convex portion protruding from a side surface of the main body portion facing the switch, and the conductive portion is formed on the abutting convex portion. Therefore, the structure is simple, and the cost is low.

In some embodiments provided in the first aspect of the present application, the elastic member includes an abutting ring, the abutting ring is disposed around the edge of the main body, and the abutting ring abuts between the key cap and the film circuit board. For the elastic element, the abutting ring abuts between the keycap and the film circuit board and is arranged around the edge of the body part. That is, the abutting ring surrounds the abutting convex part and the periphery of the switch, so that the conductive part and the switch can be protected by the integral structure formed by the abutting ring and the body part, and the waterproof and dustproof effects are improved.

In some embodiments provided in the first aspect of the present application, the elastic element is integrally conductive, and the elastic element and the conductive portion are made of the same material.

In some embodiments provided by the first aspect of the present application, the conductive portion comprises: the light-transmitting substrate comprises a light-transmitting substrate and a light-transmitting conductive material, wherein the conductive material is uniformly distributed in the substrate.

In some embodiments provided by the first aspect of the present application, the conductive material is silver nanowires and/or graphene. Thus, the conductive portion can have good light transmittance and conductivity.

In order to improve the light transmittance of the substrate and reduce the cost of the substrate, the material of the substrate may be rubber or silica gel.

In order to improve the light transmittance of the main body and reduce the cost of the main body, the main body may be made of rubber or silicone.

In order to improve the light transmittance of the abutting ring and reduce the cost of the abutting ring, the abutting ring may be made of rubber or silica gel.

In order to simplify the processing of the elastic member and improve the connection reliability between the structures of the elastic member, the material of the main body and the abutting ring may be the same as the material of the base material.

In order to improve the structural strength of the elastic part and simplify the processing technology of the elastic part, the elastic part can be an integrally formed part.

In some embodiments provided in the first aspect of the present application, the thin film circuit board includes a second insulating thin film layer, the second insulating thin film layer is disposed on a surface of the first insulating thin film layer facing the key cap and covers the first circuit trace and the second circuit trace, and the second insulating thin film layer has a avoiding hole opposite to the switch.

In some embodiments provided by the first aspect of the present application, the substrate comprises: the key cap comprises a first insulating film layer, an insulating isolation layer and a second insulating film layer, wherein the first insulating film layer, the insulating isolation layer and the second insulating film layer are sequentially stacked in the moving direction of the key cap; and at the pressed position of the keycap, the first conductive contact and the second conductive contact are contacted in the avoiding channel to form electric conduction.

In some embodiments provided in the first aspect of the present application, the first circuit trace is transparent, that is, the first circuit trace is entirely transparent. Therefore, more light rays can be conveniently transmitted to the keycap, the first circuit wiring is processed by utilizing one material, the first circuit and the first conductive contact are not required to be processed by utilizing two different materials, and the processing technology of the first circuit wiring is simplified.

In some embodiments provided in the first aspect of the present application, the second circuit trace is transparent, that is, the second circuit trace is entirely transparent. Therefore, more light rays can be conveniently transmitted to the keycap, the second circuit wiring is processed by utilizing one material, the second circuit and the second conductive contact are not required to be processed by utilizing two different materials, and the processing technology of the second circuit wiring is simplified. Illustratively, both the first circuit trace and the second circuit trace are optically transparent.

In some embodiments provided in the first aspect of the present application, the material of the first circuit trace is a silver nanowire and/or graphene. This makes it possible to achieve both light transmittance and electrical conductivity.

In some embodiments provided in the first aspect of the present application, the second circuit trace is made of silver nanowires and/or graphene. This makes it possible to achieve both light transmittance and electrical conductivity.

In order to further simplify the processing technology, the first circuit trace and the second circuit trace are made of the same material.

In some embodiments provided in the first aspect of the present application, a lighted keypad includes: the backlight module is stacked on one side, away from the keycap, of the thin film circuit board, and the backlight module is used for guiding light generated by the light emitting device to the switch.

In some embodiments provided by the first aspect of the present application, the backlight module includes: a light guide sheet and a reflective sheet. The light guide sheet is used for guiding the light generated by the light emitting device to the switch; the reflector plate is arranged on one side of the light guide plate, which is far away from the thin film circuit board. Thus, the light emitting device can provide light to the light guide plate. When the light is injected into the light guide sheet, the light can be diffused to the whole light guide sheet. And a part of light can be shot to the switch under the action of the light guide plate. Part of the light is scattered on the reflecting sheet, and the part of the light radiated on the reflecting sheet is reflected towards the switch under the action of the reflecting sheet, so that at least part of the light is emitted to the switch. Therefore, under the action of the reflector plate, the utilization rate of light provided by the light-emitting device is improved, and more light can be reflected to the keycap.

In some embodiments provided in the first aspect of the present application, in order to improve the light guiding effect, light guiding bumps are disposed at positions of the light guiding sheet corresponding to the light holes, and the light guiding bumps protrude out of the surface of the light guiding sheet.

Exemplarily, the light guide salient points and the light guide sheet are integrally formed, so that the light guide effect is improved, the connection strength of the light guide sheet and the light guide salient points can be improved, the processing technology of the light guide sheet and the light guide salient points is simplified, and the production cost is reduced.

For example, in order to further improve the light guiding effect of the light guiding bumps, the light guiding bumps may extend into the light transmitting holes.

For example, the reflective sheet may be a reflective layer formed on a surface of a side of the light guide sheet facing away from the keycap. The material of the reflective layer includes, but is not limited to, metal (e.g., silver, copper, etc.).

Illustratively, the reflective sheet includes a reflective substrate sheet and a reflective layer disposed on the substrate sheet. The material of the reflective layer includes, but is not limited to, metal (e.g., silver, copper, etc.).

In some embodiments provided by the first aspect of the present application, the reflective sheet is provided with mounting holes, and at least a part of the light emitting device is located in the mounting holes. Therefore, the space occupied by the light-emitting device and the backlight module can be saved, the compactness of the keyboard structure is realized, and the light generated by the light-emitting device is guided to the keycap.

In some embodiments provided by the first aspect of the present application, the light guide plate has a light guide hole opposite to the mounting hole, and the light emitting end of the light emitting device is located in the light guide hole. Therefore, the structure of the keyboard can be further simplified, the structural layout of the keyboard is reasonably optimized, and the light guide effect of the light guide sheet is improved.

For example, in order to further improve the utilization rate of the light emitted from the light emitting device, the light guide hole and the switch may be aligned.

In some embodiments provided in the first aspect of the present application, the backlight module further includes a light shielding sheet, the light shielding sheet is disposed between the light guiding sheet and the thin film circuit board, and the light shielding sheet has a light leakage portion facing the switch.

In some embodiments provided in the first aspect of the present application, the keyboard further includes a bottom plate fixed between the film circuit board and the backlight module, the bottom plate has a light hole facing the switch, and the key cap is movably connected to the bottom plate.

In a second aspect, the present application provides an electronic device comprising: mainboard and the keyboard that can give out light in any one of the above-mentioned embodiments. Wherein, the film circuit board and the light-emitting device are electrically connected with the mainboard.

It can be understood that the electronic device of the second aspect provided above includes the light-permeable keyboard in any of the embodiments described above, and therefore, the beneficial effects achieved by the electronic device can refer to the beneficial effects of the keyboard provided above, and the details are not repeated herein.

Drawings

Fig. 1 is a perspective view of an electronic device provided in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a keyboard host in the electronic device shown in FIG. 1;

FIG. 3 is a schematic diagram of a keyboard in the keyboard host according to FIGS. 1 and 2;

FIG. 4 is an exploded view of the keyboard shown in FIG. 3;

FIG. 5 isbase:Sub>A schematic view, partly in section, in the direction A-A of the keyboard according to FIG. 3;

FIG. 6 is a schematic view, partly in section, of the keyboard shown in FIG. 3 in the B-B direction;

FIG. 7 is an enlarged view of the circled portion at C in the keyboard of FIG. 6;

FIG. 8 is a schematic cross-sectional view of the membrane wiring board according to FIGS. 3-7;

FIG. 9 is an exploded view of the thin film wiring board according to FIG. 8;

FIG. 10 is a schematic partially cross-sectional view of the keyboard of FIG. 6 with the lift member omitted, wherein the keycap is in a released state;

FIG. 11 is a schematic partial cross-sectional view of the keyboard of FIG. 6 with the lift member omitted, wherein the keycap is in a depressed state;

fig. 12 is a perspective view of the elastic member according to the keypad shown in fig. 10-11;

FIG. 13 is an exploded view of a thin film circuit board according to other embodiments of the present application;

FIG. 14 is a schematic partial cross-sectional view of a keyboard employing the membrane wiring board of FIG. 13, wherein the keycap is in a released state;

FIG. 15 is a schematic partial cross-sectional view of a keyboard employing the membrane wiring board of FIG. 13, wherein the keycaps are in a depressed state;

fig. 16 is a schematic diagram illustrating the first circuit trace, the second circuit trace and the conductive portion of the thin film circuit board shown in fig. 13-14 being mated under a pressed state;

fig. 17 is a schematic view illustrating a first circuit trace, a second circuit trace and a conductive portion of a thin film circuit board according to still another embodiment of the present application in a pressed state;

FIG. 18 is a perspective view of a spring for the keyboard shown in FIGS. 14-15 provided in accordance with some embodiments of the present application;

FIG. 19 is a perspective view of a spring for the keyboard shown in FIGS. 14-15 according to other embodiments of the present application;

FIG. 20 is a perspective view of a spring for the keyboard shown in FIGS. 14-15 according to still other embodiments of the present application;

FIG. 21 is a perspective view of a spring for the keyboard shown in FIGS. 14-15 according to some other embodiments of the present application;

FIG. 22 is a perspective view of a spring for the keyboard shown in FIGS. 14-15 provided in accordance with other embodiments of the present application;

FIG. 23 is a partially cut-away schematic view of a keyboard according to some other embodiments.

Reference numerals:

an electronic device 1000;

a keyboard host 100;

a keyboard 10; a base plate 1; a light-transmitting hole 11; a keycap 2; a lifting member 3; the first lifter 31; a second lifting member 32;

a thin film wiring board 4; a yielding hole 4a; a substrate 41; a first insulating film layer 411; an insulating isolation layer 413; an avoidance channel 4131; a second insulating film layer 412; an avoidance hole 4121; a first circuit trace 414; a first circuit 4141; a first conductive contact 4142; a second circuit trace 415; a second circuit 4151; a second conductive contact 4152; a contact 41521; a switch 42; an elastic member 5; a trigger section 51; a body portion 511; an interference protrusion 512; the abutment ring 52; a conductive portion 53; a base material 531; a conductive material 532; a backlight module 6; a light guide sheet 61; a light guide hole 611; a reflective sheet 62; a mounting hole 621; a light-shielding sheet 63; a light leakage portion 631; a light emitting device 7; an electrical connection structure 8; a housing 20; a C shell 201; an avoidance port 201a; d shell 202; a main board 40;

a display 200.

Detailed Description

In the embodiments of the present application, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and mean that, for example, "connected" may or may not be detachably connected; may be directly connected or indirectly connected through an intermediate. The term "fixedly connected" means that they are connected to each other and their relative positional relationship is not changed after the connection. "rotationally coupled" means coupled to each other and capable of relative rotation after being coupled. "slidably connected" means connected to each other and capable of sliding relative to each other after being connected.

The directional terms used in the embodiments of the present application, such as "inner", "outer", etc., are used solely in reference to the orientation of the figures, and thus, are used for better and clearer illustration and understanding of the embodiments of the present application, rather than to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated in a particular orientation, and therefore should not be considered limiting of the embodiments of the present application. In addition, the term "plurality" as used herein means two or more unless otherwise specified in the present application.

In the description of the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

In the embodiment of the present application, "and/or" is only one kind of association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone.

The application provides an electronic device. The electronic device is a type of electronic device having a keypad that can emit light. Specifically, the electronic device includes, but is not limited to, a tablet personal computer (tablet personal computer), a laptop computer (laptop computer), a Personal Digital Assistant (PDA), a personal computer, a notebook computer (notebook), and an in-vehicle device.

Referring to fig. 1, fig. 1 is a perspective view of an electronic device 1000 according to an embodiment of the disclosure. In this embodiment, the electronic device 1000 is a notebook computer. Specifically, the electronic device 1000 includes a display 200 and a keyboard host 100.

The display 200 is used to display images, video, and the like. The display 200 may be, but is not limited to, an organic light-emitting diode (OLED) display, an active matrix organic light-emitting diode (AMOLED) display, a mini light-emitting diode (mini-OLED) display, a micro light-emitting diode (micro-OLED) display, a quantum dot light-emitting diode (QLED) display, and the like.

The keyboard main body 100 is rotatably connected with the display 200. The keyboard host 100 is used for inputting instructions and data and controlling the display 200 to display images and videos according to the inputted instructions and data. Meanwhile, the keyboard host 100 is also used to play voice or music.

The electronic device 1000 is capable of switching between an open state and a closed state. When the electronic device 1000 is in the open state (as shown in fig. 1), the display 200 and the keyboard host 100 form an angle greater than 0 ° and less than 180 °. When the electronic device 1000 is in the closed state, the display 200 covers the keyboard host 100, and a display surface of the display 200 is opposite to a keyboard surface of the keyboard host 100.

For convenience of the following description of the embodiments, an XYZ coordinate system is established for the keyboard host 100. Specifically, the extending direction of the rotation axes of the keyboard main body 100 and the display 200 is defined as an X-axis direction, the thickness direction of the keyboard main body 100 is defined as a Z-axis direction, and the direction perpendicular to both the X-axis direction and the Z-axis direction is defined as a Y-axis direction. It is understood that the coordinate system of the keyboard host 100 can be flexibly configured according to actual needs, and is not limited in particular.

Referring to fig. 2, fig. 2 is a schematic cross-sectional structure diagram of the keyboard host 100 in the electronic device 1000 shown in fig. 1. In the present embodiment, the keyboard host 100 includes a housing 20, a motherboard 40, and a keyboard 10.

It should be noted that fig. 2 only schematically shows some components included in the keyboard host 100, and the actual shape, the actual size, the actual position and the actual configuration of these components are not limited by fig. 2 and the following drawings.

The housing 20 serves to protect the internal structure of the keyboard main unit 100. The material of the housing 20 includes, but is not limited to, plastic and metal. The housing 20 may be a unitary structure or may be formed from a plurality of assembled parts. In some embodiments, referring to fig. 2, the housing 20 includes a C-shell 201 and a D-shell 202. The C-shell 201 is mated with the D-shell 202 to enclose an inner receiving space of the housing 20. Specifically, the C shell 201 and the D shell 202 are aligned in the Z direction to enclose the internal receiving space of the housing 20. The C shell 201 and the D shell 202 may be fixed by clamping, or may be fixed by gluing, or may be fixed by screwing, and is not limited specifically herein.

The main board 40 is fixed in the housing 20. The motherboard 40 is secured within the housing 20 by indirect or direct means. Illustratively, the main board 40 may be secured within the housing 20 by a threaded connection, snap fit, welding, or the like.

The main board 40 is used for integrating a control chip. The control chip may be, for example, an Application Processor (AP), a double data rate synchronous dynamic random access memory (DDR), a universal flash memory (UFS), and the like.

The main board 40 may be a hard circuit board, a flexible circuit board, or a rigid-flexible circuit board. The main board 40 may be an FR-4 dielectric board, a Rogers (Rogers) dielectric board, a hybrid FR-4 and Rogers dielectric board, or the like. Here, FR-4 is a code for a grade of flame-resistant material, and the Rogers dielectric plate is a high-frequency plate.

The keyboard 10 is used for inputting instructions and data. The keyboard 10 is electrically connected to the main board 40, and the main board 40 is used for receiving commands and data input by the keyboard 10. Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of the keyboard 10 in the keyboard host 100 shown in fig. 1 and 2; fig. 4 is an exploded view of the keyboard 10 according to fig. 3. The keyboard 10 includes: the key comprises a bottom plate 1, a key cap 2, a lifting component 3, a light-transmitting film circuit board 4, a light-transmitting elastic component 5, a backlight module 6 and a light-emitting device 7.

It should be noted that fig. 3-4 only schematically illustrate some components included in the keyboard 10, and the actual shape, actual size, actual position and actual configuration of these components are not limited by fig. 3-4.

The bottom plate 1 serves as a structural "skeleton" of the keyboard 10, and is mainly used for supporting and fixing the backlight module 6, the light-emitting device 7, the keycap 2, the lifting component 3 and the thin film circuit board 4. The base plate 1 is located in the inner receiving space of the housing 20. Specifically, the base plate 1 may be fixed to the C-shell 201. Illustratively, the bottom plate 1 is fixed to the C-shell 201 by gluing, snapping, screwing, riveting, or the like. Of course, in other examples, the bottom plate 1 may be fixed to the D-shell 202.

The base plate 1 has a substantially rectangular flat plate shape. The material of the bottom plate 1 includes, but is not limited to, metal, plastic and a combination thereof. The base plate 1 has a light-transmitting hole 11 penetrating the base plate 1 in the thickness direction (i.e., Z-axis direction) of the base plate 1.

The keycap 2 is connected with the bottom plate 1. Specifically, the key cap 2 has a pressed position and a released position. The key cap 2 is movable relative to the base plate 1 in the thickness direction of the base plate 1 (i.e., in the Z-axis direction) to switch between a pressed position and a released position. The distance between the keycap 2 and the base plate 1 in the release position is greater than the distance between the keycap 2 and the base plate 1 in the pressed position. The key cap 2 may be plural. In the following description, the key cap 2 is taken as an example for explanation.

An avoidance opening 201a (see fig. 2) is formed in the C-shell 201 at a position corresponding to each key cap 2. The keycap 2 extends out of the C shell 201 through the avoiding opening 201 a. The key cap 2 has a light-transmissive portion (not shown). And the key cap 2 is opposite to the light transmission hole 11. In this way, the light transmitted from the light transmitting hole 11 can be transmitted to the light transmitting portion and pass through the light transmitting portion, so that the user can select the key cap 2 to be pressed according to the graph displayed by the light transmitted from the light transmitting portion in a dark environment, and the accuracy of inputting information by the user using the keyboard 10 can be improved.

Exemplary shapes of the light-transmitting portion include, but are not limited to, english alphabet style, punctuation mark style, chinese radical style, animal figure style, or other figure style for reminding or decoration. The material of the key cap 2 includes, but is not limited to, plastic.

Referring to fig. 5 and 6, fig. 5 isbase:Sub>A schematic partial cross-sectional view of the keyboard 10 shown in fig. 3 inbase:Sub>A directionbase:Sub>A-base:Sub>A; fig. 6 is a partial cross-sectional schematic view of the keyboard 10 shown in fig. 3 in the direction B-B. The lifting member 3 is connected between the key cap 2 and the base plate 1. The key cap 2 moves between a pressed position and a released position with respect to the base plate 1 via the elevating member 3. Specifically, the lifting member 3 is constructed in a scissor-type structure. Specifically, the lifting member 3 includes a first lifter 31 and a second lifter 32. The first lifter 31 and the second lifter 32 are disposed to cross, and the first lifter 31 and the second lifter 32 are pivotally connected at a crossing position. The first lifting member 31 is movably connected between the key cap 2 and the bottom plate 1, and the second lifting member 32 is movably connected between the key cap 2 and the bottom plate 1. Thereby, the key cap 2 can be moved between the pressed position and the released position with respect to the base plate 1 by the scissor-foot connection design of the first and

second lifters

31, 32.

Illustratively, a plurality of lifting members 3 are arranged between each key cap 2 and the base plate 1. For example, as shown in fig. 5, two elevating members 3 are disposed between each key cap 2 and the base plate 1. Of course, the present application is not limited thereto, and in other examples, one elevating member 3 is disposed between each key cap 2 and the base plate 1. The present application is not limited with respect to the specific number of the elevation members 3 between each of the keyboards 10 and the base plate 1.

With continued reference to fig. 5 and 6, the backlight module 6 is located on a side of the bottom plate 1 away from the keycap 2. The backlight module 6 is stacked on the chassis 1. The backlight assembly 6 is used to guide the light generated by the light emitting devices 7 to the light transmission holes 11. Thus, light can be refracted through the light-transmitting hole 11 onto the key cap 2, thereby allowing the keyboard 10 to emit light. It is understood that when the backlight module 6 is included in the electronic device 1000, the electronic device 1000 may not include the bottom board 1, but the backlight module 6 is used to support the film circuit board 4, the key cap 2, the elastic member 5, and the like. In other examples, the electronic device 1000 may not include the backlight module 6.

Specifically, with continued reference to fig. 5 and 6, the backlight module 6 includes a light guide plate 61 and a reflector plate 62. Light guide sheet 61 and reflection sheet 62 are stacked. The reflective sheet 62 is provided on the side of the light guide sheet 61 facing away from the key cap 2. The light emitting device 7 may provide light to the light guide sheet 61. When light is incident on the light guide sheet 61, the light can be diffused throughout the light guide sheet 61. And a portion of the light may be directly injected into the light-transmitting hole 11 upward by the light guide sheet 61. A portion of the light is scattered downward onto the reflective sheet 62, and the portion of the light radiated onto the reflective sheet 62 is reflected upward by the reflective sheet 62, so that at least a part of the portion of the light enters the light-transmitting hole 11. Therefore, under the action of the reflector plate 62, the utilization rate of the light provided by the light-emitting device 7 is improved, and more light can be refracted to the keycap 2 through the light-transmitting holes 11.

The material of the light guide plate 61 includes, but is not limited to, polycarbonate and/or acrylic plastic.

In order to improve the light guiding effect, light guiding protrusions are disposed on the light guiding sheet 61 at positions corresponding to the light holes 11, and the light guiding protrusions protrude out of the surface of the light guiding sheet 61. Exemplarily, the light guide bumps and the light guide sheet 61 are integrally formed, which is favorable for improving the light guide effect, and can also improve the connection strength of the light guide sheet 61 and the light guide bumps, simplify the processing technology of the light guide sheet 61 and the light guide bumps, and reduce the production cost. Of course, the present application is not limited thereto, and in other examples, the light guide protrusions and the light guide sheet 61 may be adhesively connected by a light-transmitting adhesive layer.

In order to further improve the light guiding effect of the light guiding bumps, the light guiding bumps may extend into the light holes 11. Of course, it is understood that in other examples, the light guide bumps may not extend into the light transmissive holes 11. Alternatively, in order to simplify the structure of the light guide sheet 61, the light guide sheet 61 may not be provided with the light guide protrusions.

The reflective sheet 62 may be a reflective layer formed on a surface of the light guide sheet 61 on a side facing away from the key cap 2. The material of the reflective layer includes, but is not limited to, metal (e.g., silver, copper, etc.). Alternatively, in other examples, the reflective sheet 62 includes a reflective substrate sheet and a reflective layer disposed on the substrate sheet. The material of the reflective layer includes, but is not limited to, metal (e.g., silver, copper, etc.).

To simplify the structure of the keyboard 10 and optimize the structural layout of the keyboard 10 reasonably, please refer to fig. 7, in which fig. 7 is an enlarged view of a circled portion at C in the keyboard 10 shown in fig. 6. The reflection sheet 62 is provided with a mounting hole 621 penetrating the reflection sheet 62 in the thickness direction of the reflection sheet 62. At least part of the light emitting device 7 is located in the mounting hole 621. Thus, the space occupied by the light emitting device 7 and the backlight module 6 can be saved, the compactness of the structure of the keyboard 10 is realized, and the light generated by the light emitting device 7 is favorably guided to the keycap 2. It should be noted that the layout of the light emitting devices 7 and the backlight module 6 is not limited to the above-mentioned manner, and in other examples, the light emitting devices 7 may be located on the side facing the peripheral edge of the backlight module 6. As long as it is ensured that the light emitting device 7 is located at the side of the base plate 1 facing away from the key cap 2.

Further, in order to further simplify the structure of the keyboard 10, reasonably optimize the structural layout of the keyboard 10, and simultaneously improve the light guiding effect of the light guiding sheet 61, the light guiding sheet 61 is provided with a light guiding hole 611 facing the mounting hole 621, and the light emitting end of the light emitting device 7 is located in the light guiding hole 611.

For example, in order to further improve the utilization rate of the light emitted from the light emitting device 7, the light guide hole 611 and the light transmission hole 11 may be aligned. Of course, the present application is not limited thereto, and the light guide hole 611 and the light transmission hole 11 may be staggered with reference to fig. 5 and 6.

On this basis, in order to further improve the light guiding effect of the backlight module 6, please continue to refer to fig. 5 and 6, the backlight module 6 further includes a light shielding sheet 63. The light shielding sheet 63 is disposed between the light guiding sheet 61 and the bottom plate 1, and the light shielding sheet 63 has a light leakage portion 631 facing the light transmission hole 11. Thus, the light provided by the light emitting device 7 to the light guide plate 61 is continuously reflected between the light shielding plate 63 and the reflection plate 62, so that more light can be emitted into the light hole 11 after passing through the light leakage part 631, the utilization rate of the light provided by the light emitting device 7 is improved, and more light can be refracted to the key cap 2 through the light hole 11.

For example, the light shielding sheet 63 may be a light shielding layer formed on a surface of the light guiding sheet 61 facing the key cap 2. The material of the light shielding layer includes, but is not limited to, black ink. The light shielding layer is hollowed out at a position corresponding to the light hole 11 to form a light leakage part 631. Alternatively, in other examples, the light-shielding sheet 63 includes a light-transmissive substrate plate and a light-shielding layer disposed on the substrate plate, and the material of the light-shielding layer includes, but is not limited to, black ink. The light shielding layer is hollowed out at a position corresponding to the light transmitting hole 11, so that the part of the substrate board facing the light transmitting hole 11 and the hollowed-out part of the light shielding layer define the light leakage part 631 together.

Note that, the backlight unit 6 may not be provided with the light-shielding sheet 63, and the bottom plate 1 having a light-shielding function may function as the light-shielding sheet 63. Therefore, the thickness of the backlight module 6 can be reduced, thereby being beneficial to reducing the whole thickness of the keyboard 10 and reducing the manufacturing cost of the keyboard 10.

In some examples, the light emitting device 7 and the backlight assembly 6 may be integrated. For example, the backlight module 6 may be a backlight module including led lamps or an RGB module including electro-luminescent sheets.

Of course, it is understood that the light emitting device 7 and the backlight module 6 may be independent. With reference to fig. 5 and fig. 6, the light emitting device 7 can be electrically connected to the main board 40 through the trace structure 9, and the light emitting device 7 is fixed on the trace structure 9. Illustratively, the light emitting device 7 can be fixed on the routing structure 9 by soldering, clipping, or gluing. Illustratively, the routing structure may be a flexible circuit board. The light emitting device 7 includes, but is not limited to, an LED lamp.

With reference to fig. 5 and fig. 6, the thin film circuit board 4 is disposed on a side of the bottom plate 1 away from the backlight module 6, and is stacked with the bottom plate 1 and the backlight module 6. That is, the base plate 1 is located between the thin film circuit board 4 and the backlight module 6, and the base plate 1, the thin film circuit board 4 and the backlight module 6 are stacked. Thus, the film wiring board 4 can be supported and fixed by the chassis base 1. The connection between the film circuit board 4 and the bottom plate 1 includes but is not limited to gluing, clamping, screwing or welding.

The film wiring board 4 is provided with a relief hole 4a (see fig. 4) penetrating through the film wiring board 4. The keycap 2 is located on one side of the film circuit board 4 far away from the backlight module 6. The abdicating hole 4a is used for the lifting component 3 to pass through so as to realize the connection between the keycap 2 and the bottom plate 1. The thin film circuit board 4 is electrically connected to the main board 40 through an electrical connection structure 8 (see fig. 4).

Referring to fig. 8 and 9, fig. 8 is a schematic cross-sectional view of the thin film circuit board 4 shown in fig. 3-7; fig. 9 is an exploded view of the thin film wiring board 4 according to fig. 8. The thin film wiring board 4 includes: a light-transmissive switch 42 and a light-transmissive substrate 41. The switch 42 is provided on the substrate 41. The switch 42 is opposite to the light-transmitting hole 11.

In some examples, the substrate 41 includes a first insulating thin film layer 411, an insulating isolation layer 413, and a second insulating thin film layer 412. The first insulating film layer 411, the insulating separator 413, and the second insulating film layer 412 are sequentially stacked in the moving direction (i.e., the Z-axis direction) of the key cap 2. The insulation separation layer 413 is located at the first insulation film layer 411 and the second insulation film layer 412 to separate the first insulation film layer 411 and the second insulation film layer 412. The second insulating film layer 412 is located on a side of the first insulating film layer 411 away from the base plate 1.

The first insulating film layer 411, the insulating isolation layer 413, and the second insulating film layer 412 may be made of the same material or different materials. Specifically, the first insulating film layer 411, the insulating isolation layer 413, and the second insulating film layer 412 may be made of plastic. For example, the first insulating film layer 411, the insulating separator layer 413, and the second insulating film layer 412 may be a Polyethylene terephthalate (PET) film or a Polycarbonate (PC) film. As long as the material used for manufacturing the first insulating thin film layer 411, the insulating isolation layer 413, and the second insulating thin film layer 412 has translucency.

With reference to fig. 8 and fig. 9, the thin film circuit board 4 further includes a first circuit trace 414 and a second circuit trace 415. One of the first circuit trace 414 and the second circuit trace 415 is a positive trace, and the other is a negative trace. The first circuit trace 414 is formed on a surface of the first insulating thin film layer 411 facing the second insulating thin film layer 412. The second circuit trace 415 is formed on a surface of the second insulating thin film layer 412 facing the first insulating thin film layer 411. Therefore, the first circuit trace 414 and the second circuit trace 415 are respectively formed on different thin film layers, so that the first circuit trace 414 and the second circuit trace 415 are spaced apart by using the insulating isolation layer 413, and the working reliability of the thin film circuit board 4 is improved.

Specifically, the first circuit trace 414 includes a first circuit 4141 and a first conductive contact 4142. Wherein the first conductive contact 4142 is electrically connected to the first circuit 4141. The second circuit trace 415 includes a second circuit 4151 and a second conductive contact 4152. The second conductive contact 4152 is electrically connected to the second circuit 4151. The first conductive contact 4142 and the second conductive contact 4152 are oppositely disposed in the moving direction of the key cap 2 (i.e., the Z-axis direction). As such, the corresponding first and second

conductive contacts

4142, 4152 may form the switch 42.

By way of example, the shape of the first conductive contact 4142 includes, but is not limited to, circular, scalloped, semicircular, rectangular, oval, or contoured. The shape of the second conductive contact 4152 includes, but is not limited to, circular, scalloped, semi-circular, rectangular, oval, or contoured. In order to improve the contact reliability of the first conductive contact 4142 and the second conductive contact 4152, the first conductive contact 4142 and the second conductive contact 4152 are identical in shape.

To achieve contact conduction between the first conductive contact 4142 and the second conductive contact 4152, an escape channel 4131 is provided on the insulating isolation layer 413 corresponding to the switch 42. Thus, when a user presses the key cap 2 towards the bottom plate 1, the first insulating film layer 411 and the second insulating film layer 412 are forced to be relatively close to each other, and when the key cap 2 moves to the pressed position, the first conductive contact 4142 and the second conductive contact 4152 are contacted in the avoiding channel 4131 to form electrical conduction. When the user no longer presses the key cap 2, the first conductive contact 4142 and the second conductive contact 4152 are insulated apart.

Referring to fig. 10 and 11, fig. 10 is a schematic partial cross-sectional view of the keyboard 10 shown in fig. 6 with the lifting member 3 omitted, wherein the key cap 2 is in a released state; fig. 11 is a partially cross-sectional schematic view of the keyboard 10 shown in fig. 6 with the lifting member 3 omitted, wherein the key cap 2 is in a depressed state. The elastic piece 5 is abutted between the keycap 2 and the film circuit board 4.

Please continue to refer to fig. 10 and fig. 11 in combination with fig. 12, wherein fig. 12 is a perspective view of the elastic member 5 in the keyboard 10 shown in fig. 10-fig. 11. The elastic member 5 includes: a trigger part 51 and an abutment ring 52. The abutting ring 52 is provided around the periphery of the trigger 51.

The abutting ring 52 abuts between the key cap 2 and the film wiring board 4. The trigger 51 faces the switch 42. In the release position of the key top 2, the trigger portion 51 is spaced apart from the film wiring board 4, and in the pressed position of the key top 2, the trigger portion 51 contacts the film wiring board 4 to trigger the switch 42.

Specifically, referring to fig. 11, when the user presses the key cap 2 from the side toward which the key cap 2 faces, the elastic member 5 is elastically deformed to facilitate the key cap 2 to further move toward the bottom plate 1. When the key cap 2 moves to the pressed position, the elastic member 5 may deform to a predetermined degree to enable the triggering portion 51 to press the film circuit board 4, so that the position of the first insulating film layer 411 corresponding to the triggering portion 51 and the position of the second insulating film layer 412 corresponding to the triggering portion 51 are forced to be relatively close to each other, and the first conductive contact 4142 and the second conductive contact 4152 are contacted in the avoiding channel 4131 to form electrical conduction, so as to achieve the purpose of triggering the switch 42. Referring to fig. 10, after the user releases the pressing action on the key cap 2, the elastic member 5 returns to the original shape under the action of its own resilience, and in the process, the elastic member 5 drives the key cap 2 to move away from the base plate 1 to the release position, and the trigger portion 51 is spaced apart from the film circuit board 4, so that the position of the first insulating film layer 411 corresponding to the trigger portion 51 is spaced apart from the position of the second insulating film layer 412 corresponding to the trigger portion 51, and the first conductive contact 4142 is spaced apart from the second conductive contact 4152.

Specifically, the trigger 51 includes a body 511 and an interference protrusion 512. The body portion 511 has a sheet shape. The body portion 511 and the film wiring board 4 are arranged substantially in parallel (some tolerance is also allowed in an actual product, for example, the included angle between the body portion 511 and the film wiring board 4 is within ± 10 °). The abutment ring 52 is disposed around the edge of the body 511. The interference protrusion 512 protrudes from a surface of the body 511 facing the switch 42. The interference protrusion 512 faces the switch 42. Thus, in the pressed position of the key top 2, the abutting projection 512 can contact the thin film circuit board 4 to trigger the switch 42. By providing the abutting protrusion 512 on the body 511, the switch 42 can be triggered under the condition that the elastic element 5 is deformed relatively slightly, which is beneficial to improving the service life of the elastic element 5. Of course, it is understood that, in other examples, the trigger portion 51 may be provided with no interference protrusion 512, and the body portion 511 may be used to trigger the switch 42.

Specifically, with continued reference to fig. 11, the direction indicated by the arrow in fig. 11 is the propagation direction of the light. The light emitted from the light emitting device 7 is guided to the light transmission hole 11 by the light guide sheet 61, the reflector sheet 62 and the light shielding sheet 63, and the light entering the light transmission hole 11 is emitted to the thin film circuit board 4. Since the substrate 41 of the thin film circuit board 4 transmits light and the switches 42 (i.e., the first conductive contact 4142 and the second conductive contact 4152) in the thin film circuit board 4 transmit light, light from the light-transmitting hole 11 can more transmit upwards through the thin film circuit board 4 and pass through the light-transmitting elastic member 5 to reach the light-transmitting portion of the keyboard 10.

In the related art, in order to save material cost, opaque materials are usually selected to process the first circuit trace 414 and the second circuit trace 415, which often results in that a part of light transmitted by the light-transmitting hole 11 is shielded by a part of circuit traces directly opposite to the light-transmitting hole 11 and cannot reach the light-transmitting portion, so that less light can be actually transmitted to the light-transmitting portion of the key cap 2, and light at the key cap 2 is weak and uneven. In the keyboard 10 of the embodiment of the present application, the substrate 41 is transparent, and the switch 42 (i.e., the first conductive contact 4142 and the second conductive contact 4152) corresponding to the key cap 2 is also transparent, so that on the premise of not increasing the number of the light emitting devices 7, more light can be transmitted to the key cap 2, the light at the key cap 2 is enhanced, the uniformity of the light at the key cap 2 is improved, and the backlight effect of the keyboard 10 is improved.

In some examples, the first circuit trace 414 is entirely optically transmissive. Therefore, more light can be conveniently transmitted to the keycap 2, the first circuit trace 414 can be processed by using one material, the first circuit 4141 and the first conductive contact 4142 do not need to be processed by using two different materials, and the processing technology of the first circuit trace 414 is simplified.

Illustratively, the material of the first circuit trace 414 is silver nanowire. The silver nanowire is a nano-sized silver wire. Has good conductivity and light transmission. Of course, the present application is not limited thereto, and in other examples, the material of the first circuit trace 414 may also be graphene. The graphene has better conductivity and light transmittance.

In some examples, the second circuit trace 415 is entirely light transmissive. Therefore, more light can be conveniently transmitted to the keycap 2, the second circuit wiring 415 is processed by using one material, the second circuit 4151 and the second conductive contact 4152 do not need to be processed by using two different materials, and the processing technology of the second circuit wiring 415 is simplified.

Illustratively, the material of the second circuit trace 415 is a silver nanowire. The silver nanowire is a nano-sized silver wire. Has good conductivity and light transmission. Of course, the present application is not limited thereto, and in other examples, the material of the second circuit trace 415 may also be graphene. The graphene has better conductivity and light transmittance.

In order to further simplify the manufacturing process, the first circuit trace 414 and the second circuit trace 415 are made of the same material.

Referring to fig. 13 and 14, fig. 13 is an exploded view of a thin film circuit board 4 according to another embodiment of the present application; fig. 14 is a partially cross-sectional schematic view of the keyboard 10 employing the membrane wiring board 4 shown in fig. 13, wherein the key cap 2 is in a released state. The embodiment shown in fig. 13 and 14 differs from the embodiment shown in fig. 1-12 in that the first circuit trace 414 and the second circuit trace 415 are formed on the surface of the first insulating film layer 411 facing the key cap 2 at intervals. And the surface of the first insulating film layer 411 facing the keycap 2 is covered by the insulating isolation layer 413, and the first circuit trace 414 and the second circuit trace 415 are covered by the insulating isolation layer 413, and the surface of the insulating isolation layer 413 facing the keycap 2 is covered by the second insulating film layer 412, and the first circuit trace 414 and the second circuit trace 415 are covered, so that the first circuit trace 414 and the second circuit trace 415 are protected, and the working reliability of the thin film circuit board 4 is improved.

With continued reference to fig. 13 and 14, the second insulating film layer 412 is provided with an avoiding hole 4121 corresponding to the avoiding channel 4131, and the avoiding channel 4131 and the avoiding hole 4121 together define an avoiding space. The trigger portion 51 is provided with a light-transmitting conductive portion 53. When the key cap 2 is in the releasing position, the conductive part 53 is spaced apart from the thin film circuit board 4, and the first conductive contact 4142 and the second conductive contact 4152 are spaced apart and are not electrically conductive. Referring to fig. 15 and 16, fig. 15 is a schematic partial cross-sectional view of a keyboard 10 using the thin film circuit board 4 shown in fig. 13, wherein the key cap 2 is in a pressed state; fig. 16 is a schematic diagram illustrating the first circuit trace 414, the second circuit trace 415 and the conductive part 53 of the thin film circuit board 4 shown in fig. 13-14 in a pressed state. When the keycap 2 is at the pressed position, due to the avoiding function of the avoiding space, the conducting part 53 extends into the avoiding space to be in contact with the corresponding first conducting contact 4142 and the second conducting contact 4152, so that the conducting function of the conducting part 53 can be utilized to realize the electrical conduction of the first conducting contact 4142 and the second conducting contact 4152, and the purpose of triggering the switch 42 is achieved.

Specifically, with continued reference to fig. 15, the direction indicated by the arrow in fig. 15 is the propagation direction of the light. The light emitted from the light emitting device 7 is guided to the light transmission hole 11 by the light guide sheet 61, the reflector sheet 62 and the light shielding sheet 63, and the light entering the light transmission hole 11 is emitted to the thin film circuit board 4. And the part of the light reaches the light-transmitting part of the keycap 2 after passing through the first insulating film layer 411, the first circuit trace 414, the second circuit trace 415, the avoiding channel 4131, the avoiding hole 4121 and the elastic member 5 in sequence.

Thus, in the embodiment of the present application, by disposing the first circuit trace 414 and the second circuit trace 15 on the surface of the first insulating thin film layer 411 facing the key cap 2 at a distance, the light generated by the light emitting device 7 can simultaneously pass through the first circuit trace 414 and the second circuit trace 415, and compared with the case where the light generated by the light emitting device 7 shown in fig. 11 sequentially passes through the first circuit trace 414 and the second circuit trace 415, the light can pass through one layer of the second circuit trace 415 less in the path reaching the light-transmitting portion, so that more light can reach the elastic member, more light can reach the light-transmitting portion, and the utilization rate of the light is improved. In addition, by providing the light-transmitting conductive portion 53, not only can the conductive portion 53 be used to electrically connect the first conductive contact 4142 and the second conductive contact 4152 in the pressed state of the key cap 2, but also the propagation of light is not affected.

In some examples, referring to fig. 16, the first conductive contact 4142 and the second conductive contact 4152 are each in the shape of a small semicircle, and the first conductive contact 4142 and the second conductive contact 4152 are oppositely disposed in the plane of the first insulating film layer 411.

In still other examples, in order to improve the reliability of the conduction of the first conductive contact 4142 and the second conductive contact 4152 at the pressed position, please refer to fig. 17, fig. 17 is a schematic diagram illustrating the first circuit trace 414, the second circuit trace 415, and the conductive portion 53 in the thin film circuit board 4 according to still other embodiments of the present application in a pressed state; the second conductive contacts 4152 include two contacts 41521 spaced apart in the plane of the first insulating film layer 411 with the first conductive contact 4142 interposed between the two contacts 41521. This can facilitate improvement in reliability of electrical conduction of the conductive portion 53 with the first conductive contact 4142 and the second conductive contact 4152. Illustratively, referring to FIG. 17, the contact 41521 has a fan shape. Of course, the contact 41521 may have other shapes such as rectangular, diamond, oblong, or oval. The first conductive contact 4142 has a combination of a fan shape and a rectangular shape.

In some examples, referring to fig. 18, fig. 18 is a perspective view of a spring 5 for the keyboard 10 shown in fig. 14-15, provided according to some embodiments of the present application. The conductive portion 53 may be defined by the interference protrusion 512 described above. Thus, the structure is simple and the cost is low. In addition, the abutting ring 52 of the elastic member 5 abuts between the key cap 2 and the film circuit board 4 and surrounds the edge of the trigger part 51. That is, the abutting ring 52 surrounds the abutting protrusion 512 and the switch 42, so that the conductive portion 53 and the switch 42 can be protected by the integral structure formed by the abutting ring 52 and the body portion 511, and the waterproof and dustproof effects can be improved.

Specifically, with continued reference to fig. 18, the conductive portion 53 includes a light-transmissive substrate 531 and a light-transmissive conductive material 532, wherein the conductive material 532 is uniformly distributed in the substrate 531.

In order to improve the conductivity and light transmittance of the conductive portion 53, the conductive material 532 is silver nanowire and/or graphene. Of course, it is understood that the conductive material 532 may be other materials as long as the light transmittance and the electrical conductivity of the conductive material 532 are ensured.

In order to improve the light transmittance of the substrate 531 and reduce the cost of the substrate 531, the substrate 531 may be made of rubber or silica gel.

In order to improve the light transmittance of the main body 511 and reduce the cost of the main body 511, the main body 511 may be made of rubber or silicone.

In order to improve the light transmittance of the abutting ring 52 and reduce the cost of the abutting ring 52, the abutting ring 52 may be made of rubber or silicone.

The material of the main body 511 and the abutting ring 52 may be the same as the material of the base 531 in order to simplify the processing of the elastic element 5 and to improve the connection reliability between the structures of the elastic element 5.

In order to improve the structural strength of the elastic member 5 and simplify the processing of the elastic member 5, the elastic member 5 may be an integrally formed member.

In other examples, referring to fig. 19, fig. 19 is a perspective view of a spring 5 for keyboard 10 shown in fig. 14-15, according to other embodiments of the present application. The conductive portion 53 is defined by the trigger portion 51. That is, the conductive portion 53 may be defined by the interference protrusion 512 and the body portion 511.

On the basis, in some embodiments, in order to simplify the processing of the elastic element 5 and improve the connection reliability between the structures of the elastic element 5, the material of the base material 531 in the conductive portion 53 and the material of the abutting ring 52 may be the same.

In still other examples, referring to fig. 20, fig. 20 is a perspective view of a spring 5 for the keyboard 10 shown in fig. 14-15 provided in accordance with still other embodiments of the present application. The elastic member 5 may be conductive as a whole. The material of the elastic member 5 is the same as that of the conductive portion 53. Thus, it is possible to facilitate the simultaneous processing of the elastic element 5 and the conductive portion 53 by the integral molding process, or the direct formation of the conductive portion 53 by the elastic element 5, which is advantageous in simplifying the processing and manufacturing of the elastic element 5 and the conductive portion 53 as a whole, and reducing the cost.

In still other examples, referring to fig. 21, fig. 21 is a perspective view of a spring 5 for the keyboard 10 shown in fig. 14-15 according to some other embodiments of the present application. The conductive portion 53 may be a structure independent of the elastic member 5. Specifically, the conductive part 53 may be a conductive layer attached to at least a part of a surface of the trigger part 51 facing the switch 42. For example, the conductive layer may be processed on the elastic member 5 by a printing process. In order to improve the light transmittance of the conductive layer, the material of the conductive layer includes, but is not limited to, silver nanowires and/or graphene.

For example, with continued reference to fig. 21, the conductive layer is attached to the surface of the interference protrusion 512 facing the switch 42. Thus, the structure is simple and the cost is low. In addition, the abutting ring 52 of the elastic member 5 abuts between the key cap 2 and the film circuit board 4 and surrounds the edge of the trigger part 51. That is, the abutting ring 52 surrounds the abutting protrusion 512 and the switch 42, so that the conductive portion 53 and the switch 42 can be protected by the integral structure formed by the abutting ring 52 and the body portion 511, and the waterproof and dustproof effects can be improved.

For further example, referring to fig. 22, fig. 22 is a perspective view of a spring 5 for keyboard 10 shown in fig. 14-15, according to other embodiments of the present application. The conductive layer is attached to the surface of the interference protrusion 512 facing the switch 42 and the surface of the body portion 511 facing the switch 42.

Referring to fig. 23, fig. 23 is a partial cross-sectional view of a keyboard 10 according to some other embodiments. The embodiment shown in fig. 23 differs from the embodiments shown in fig. 13-22 in that: the thin film wiring board 4 does not include the insulating isolation layer 413. But covers the surface of the first insulating film layer 411 facing the key cap 2 and covers the first circuit trace 414 and the second circuit trace 415 with a second thin film insulating layer. And the second insulating film layer 412 is provided with an escape hole 4121 corresponding to the switch 42. When the key cap 2 is at the pressed position, the electric part 53 extends into the avoiding hole 4121 to contact with the corresponding first conductive contact 4142 and the second conductive contact 4152, so as to trigger the switch 42.

Of course, it is understood that in other examples, the second thin film insulating layer may not be disposed in the substrate 41, but the surface of the first insulating thin film layer 411 facing the elastic member 5 is covered by only the insulating isolation layer 413, and the first circuit trace 414 and the second circuit trace 415 are covered; alternatively, the substrate 41 may include only the first insulating film layer 411 and not the insulating spacer layer 413 and the second film insulating layer.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A lighted keypad, comprising: the film circuit board, the keycap, the transparent elastic piece, the backlight module, the bottom plate and the light-emitting device;

the keycaps and the light-emitting devices are respectively positioned on two sides of the thin film circuit board in the thickness direction;

the key cap has a light-transmitting portion, the key cap being movable in a thickness direction of the thin-film circuit board with respect to the thin-film circuit board to switch between a pressed position and a released position; the elastic piece is abutted between the keycap and the film circuit board and comprises a triggering part;

the thin film circuit board comprises a light-transmitting substrate and a light-transmitting switch, and the switch is arranged on the substrate and is opposite to the trigger part; at least part of the light generated by the light emitting device passes through the switch and the elastic member and is emitted into the light transmitting part; wherein, at the pressed position of the keycap, the trigger part is contacted with the film circuit board to trigger the switch; in the release position of the keycap, the trigger part is spaced apart from the thin film circuit board;

the thin film circuit board includes: the first circuit wire is arranged on the substrate and comprises a first conductive contact; the second circuit trace is arranged on the substrate, the second circuit trace and the first circuit trace are arranged at intervals, the second circuit trace comprises a second conductive contact, the first conductive contact and the second conductive contact form the switch, the first conductive contact and the second conductive contact form electrical conduction at the pressed position of the keycap, the first circuit trace and the second circuit trace are both transparent, the first circuit trace is made of silver nanowires and/or graphene, and the second circuit trace is made of silver nanowires and/or graphene;

the substrate comprises a first insulating film layer, and the first circuit trace and the second circuit trace are formed on the surface, facing the keycap, of the first insulating film layer; the triggering part is provided with a light-transmitting conductive part, and the conductive part is contacted with the first conductive contact and the second conductive contact to form electrical conduction at the pressed position of the keycap;

the backlight module is stacked on one side of the thin film circuit board, which is far away from the keycap, and is used for guiding light rays generated by the light-emitting device to the switch, and the backlight module comprises: the light guide sheet is used for guiding light rays generated by the light-emitting device to the switch, and the reflector sheet is arranged on one side of the light guide sheet, which is far away from the thin film circuit board;

the bottom plate is fixed in between the film circuit board and the backlight module, the bottom plate has the light trap just right with the switch, the key cap with the movably continuous of bottom plate, the position department that corresponds to the light trap of leaded light piece is equipped with the leaded light bump, leaded light bump protrusion in the surface of leaded light piece, and stretch into in the light trap.

2. The illuminable keyboard of claim 1, wherein the electrically conductive portion is an electrically conductive layer attached to at least a portion of a surface of the trigger portion facing the switch.

3. The illuminable keyboard according to claim 2, wherein the conductive layer is made of silver nanowires and/or graphene.

4. The illuminable keyboard of claim 2, wherein the electrically conductive portion is defined by at least a portion of the trigger portion.

5. The illuminable keyboard according to claim 3 or 4, wherein the triggering portion comprises a main body portion abutting against the key cap, and an abutting protrusion protruding from a side surface of the main body portion facing the switch, and the conductive portion is formed on the abutting protrusion.

6. The illuminable keyboard according to claim 5, wherein the resilient member comprises an abutting ring, the abutting ring surrounds the edge of the main body, and the abutting ring abuts between the keycap and the film circuit board.

7. The illuminable keyboard according to claim 1, wherein the elastic member is electrically conductive as a whole, and the elastic member and the electrically conductive portion are made of the same material.

8. The illuminable keyboard of claim 7, wherein the conductive portion comprises: the light-transmitting substrate comprises a light-transmitting substrate and a light-transmitting conductive material, wherein the conductive material is uniformly distributed in the substrate.

9. The illuminable keyboard according to claim 8, wherein the electrically conductive material is silver nanowires and/or graphene.

10. The illuminable keyboard according to claim 1, wherein the thin film circuit board comprises a second insulating thin film layer, the second insulating thin film layer is disposed on the surface of the first insulating thin film layer facing the keycap and covers the first circuit traces and the second circuit traces, and the second insulating thin film layer is provided with avoiding holes opposite to the switches.

11. The illuminable keyboard as recited in claim 1, wherein the reflective sheet is provided with mounting holes, and at least a portion of the light-emitting devices are located in the mounting holes.

12. The illuminable keyboard of claim 11, wherein the light guide plate has a light guide hole opposite to the mounting hole, and the light-emitting end of the light-emitting device is located in the light guide hole.

13. The keyboard of claim 1, wherein the backlight module further comprises a light shielding sheet disposed between the light guide sheet and the thin film circuit board, the light shielding sheet having a light leakage portion facing the switch.

14. An electronic device, comprising:

a main board;

the illuminable keyboard as claimed in any one of claims 1-13, wherein the thin-film circuit board and the light-emitting device are electrically connected to the main board.