M408732 五、新型說明： 【新型所屬之技術領域】 本創作關於-種發光鍵盤，尤指—種適於薄型化之發光鍵盤。 【先前技術】 就目前電腦的使用習慣而言，鍵盤為不可或缺的輸入設備之 魯-’用讀人文字、符號或數字。隨著電腦逐漸普及，今日鍵盤的 發展除了-般的輸入功能外，亦強調視覺上的訴求。於是，一種可 在使用時發光的鍵盤便成為鍵盤業界新的發展方向。 習知發光鍵盤大多是利用-背光模組作為光源，以達到發光的 功能。一般而言，習知發光鍵盤之背光模組係由遮光板、導光板、 反射板以及發光二極體所組成。此外，有些發光鍵盤會在背光模組 背後加上一金屬板（例如’鋁箔）’以避免發光鍵盤因靜電放電 • ( electrostatic discharge，ESD )而損壞。然而，鋁箔的設置會導致發 光鍵盤的整體厚度增加，使得發光鍵盤不利於薄型化設言十。 【新型内容】 因此’本創作的目的之一在於提供一種適於薄型化之發光鍵 盤，以解決上述問題。 根據一實施例，本創作之發光鍵盤包含一底板、複數個按鍵以 3 M408732 及一背光模組。複數個按鍵設置於底板上。背光模組包含一遮光板、 一導光板、一金屬板以及一反射層。遮光板設置於底板下，導光板 設置於遮光板下，金屬板設置於導光板下，反射層則塗佈於金屬板 上且位於導光板下。於此實施例中，由於本創作係在金屬板上塗佈 反射層，以取代習知的反射板，因此，發光鍵盤之整體厚度可減少 習知的反射板的厚度，使得本創作之發光鍵盤適於薄型化設計。 根據另-實施例，本創作之發光鍵盤包含一底板、複數個按鍵 以及一皮光模組。複數個按鍵設置於底板上。背光模組包含一遮光 板、-導光板以及-反射板，光板設置於底板下，導光板設置於 遮光板下’且反雜設置於導光板下。導光板具有複數個孔洞，且 反射板具有複數個突出部。每—個突出部分別穿過該等孔洞的其中 之-而固定於遮級之-下表面。於此實施例中，由於本創作係將 反射板的突出部_導趣軌洞直翻定於遮光板之下表面，因 此，反射板不需藉由額外的黏膠與導光板進行蚊，亦即發光鍵盤 1 整體厚度可減少郷的厚度，使得本創作之發光鍵盤適於薄型化 三π三十1 0 可以藉由以下的創作詳述及所附圖式 關於本創作之優點與精神 得到進一步的瞭解。 【實施方式】 請參閱第1圖，第1圖Μ 為根據本創作一實施例之發光鍵盤1的 M408732 剖面不意圖。如第1圖所示，發光鍵盤）包含一底板1〇、減個按 鍵12以及一背光模組14。每—個按鍵12設置於底板1〇上，以供 使用者按壓’進而執行使用者所欲輸人的功能。背細組M設置於 底板10下，以提供發光鍵盤1發光的光源。 於此實施例中’發光鍵盤1可另包含一電路板16，且按鍵12 可包含-鍵帽120、-升降支撐裝置122以及—彈性件124。電路板 16設置於底板1〇上。升降支撐裝置122與彈性件124皆設置於鍵 帽120與底板10之間。當按鍵12之鍵帽12〇被按壓時，鍵帽12〇 n伴升降支稽裝置122朝底板1〇的方向垂直移動。彈性件I% 即作為鍵帽12G減絲H)上下軸_需_力來源。彈性件 124可為橡膠塾圈（rubber d〇me)，但不以此為限。電路板^上具 有與按鍵12對應的開關，例如薄膜開關（membraneswitch)或其 匕觸發性開關。當鍵帽120被按壓時，彈性件124會觸發電路板16 上的開關’進而執行使用者所欲輸入的功能。 如第1圖所示，背光模組14包含一遮光板140、一導光板142、 一金屬板144、一反射層146以及一發光單元148。遮光板14〇設置 於底板10下，導光板M2設置於遮光板14〇下，金屬板144設置於 導光板142下’反射層146則塗佈於金屬板144上且位於導光板142 下。發光單元148設置於導光板142之一側，使得發光單元148發 射之光線可透過導光板142朝底板1〇的方向投射出。於實際應用 中，發光單元148可為一發光二極體，但不以此為限。 M408732 於此實施例中，可預先將反射層146塗佈於金屬板144上，再 將金屬板1Φ4貼設於導光板142下。於實際應用中，金屬板144可 為鋁箔’且反射層146可為反光油墨（例如，白色油墨），但不以此 為限。金屬板144係用以避免發光鍵盤1因靜電放電（electr〇static discharge，ESD)而損壞。此外反射層146係用以反射發光單元148 發出之光線’進iij增加發光鍵盤1的發光效果。 於此實施例中，由於本創作係在金屬板144上塗佈反射層146， 以取代習知的反射板，因此，發光鍵盤丨之整體厚度可減少習知的 反射板的厚度，使得本創作之發光鍵盤丨適於薄型化設計。 〇月多閱第2圖，第2圖為根據本創作另一實施例之發光鍵盤丄， 的剖面示意圖。如第2圖所示，發光鍵盤Γ與上述之發光鍵盤1的 要不同之處在於，發光鍵盤i，之背光模組14，之導光板⑷,具有複 孔洞1420且金屬板144,具有複數個突出部144〇。此外，可預 先在，光板MG之上表面贈形成複數_補記1撕，其中每 可·M ^ J心。己1404分別對應孔洞1420的其中之一。於實際應用中， 土 P製私於金屬板144,上壓印出突出部1440，且識別標記 1404可為油墨。 上冷估光模且14時’可先在金屬板144,的每-個突出部1440 上主佈轉’再將金屬板撕的每一個突出部洲分別穿過導光板 M408732 • 142的對應孔洞測。接著，將遮光板140設置在導光板142，上。 此％’每一個識別標記14〇4分別位於對應的孔洞142〇上方。接著， 對每-個識別標記MG4進行壓著 藉此，即可將金屬板144,的突出 邛1440固疋於遮光板之下表面14〇〇，進而將導光板ία，固定 於金屬板144’與遮光板14〇之間。需說明的是，第2.圖中與第i圖 中所不相關制元件，其仙原理冑相同，在此不再資述。 _ π參閱第3圖，第3圖為根據本創作另一實施例之發光鍵盤3 的剖面示意圖。如第3圖所示，發光鍵盤3與上述之發光鍵盤1的 主要不同之處在於背光模組的設計。因此，以下僅針對發光鍵盤3 之背光模組34作說明。 如第3圖所示’發光鍵盤3之背光模組34包含一遮光板34〇、 一導光板342、一反射板344、金屬板346以及一發光單元348。遮 光板340 .设置於底板3〇下，導光板342設置於遮光板340下，反射 鲁板344 δ又置於導光板342下，且金屬板346設置於反射板344下。 金屬板344係用以避免發光鍵盤3因靜電放電而損壞。於實際應用 中，金屬板344可為鋁箔，但不以此為限。發光單元348設置於導 光板342之一侧，使得發光單元348發射之光線可透過導光板342 朝底板30的方向投射出。於實際應用中，發光單元148可為一發光 二極體，但不以此為限。於此實施例中，導光板342具有複數個孔 洞3420，且反射板344具有複數個突出部3440。此外，可預先在遮 光板340之上表面3402形成複數個識別標記3404，其中每一個識 7 M408732 別標記3404分別對應孔洞3420的其中之一。於實際應用中，可藉 由壓印製程於反射板344上壓印出突出部3440，且識別標記3404 可為油墨。 於組裝背光模組34時’可先在反射板344的每一個突出部3440 上塗佈黏膠，再將反射板344的每一個突出部3440分別穿過導光板 342的對應孔洞3420。接著，將遮光板34〇設置在導光板342上。 此時’每一個識別標記3404分別位於對應的孔洞3420上方。接著， 對每一個識別標記3404進行壓著。藉此，即可將反射板344的突出 部3440固定於遮光板340之下表面34〇〇，進而將導光板342固定 於反射板344與遮光板340之間。 於此實施射，由於本創作係將反射板344的突出部344〇通過 導光板342的孔洞3420直接固定於遮光板340之下表面3400，因 此，反射板344不需藉由額外的师與導光板342進行固定，亦即 發光鍵盤3之整體厚度可減少轉的厚度，使得本創作之發光鍵盤 3適於薄型化設計。 【圖式簡單說明】 第1圖為根據本創作—實施例之發光鍵盤的剖面示意圖 =圖為根據本創作另-實施例之發光_的剖面示意圖。 圖為根據本創作另一實施例之發光鍵盤的剖面示意圖。 要元件符號說明】 1、1丨、3 發光鍵盤 10、30 底板 12 按鍵 14、14,、34 背光模組 16 電路板 120 鍵帽 122 升降支撐裝置 124 彈性件 140 、 340 遮光板 142、142’、342 導光板 144、144'、346 金屬板 146 反射層 148、348 發光單元 344 反射板 1400、3400 下表面 1402 ' 3402 上表面 1404、3404 識別標記 1420 、 3420 孔洞 1440、3440 突出部 .M408732 V. New description: [New technical field] This creation is about a kind of illuminated keyboard, especially a kind of illuminated keyboard suitable for thinning. [Prior Art] As far as the current computer usage habits are concerned, the keyboard is an indispensable input device for the user's text, symbols or numbers. With the gradual popularization of computers, today's keyboard development, in addition to the general input function, also emphasizes visual appeal. Therefore, a keyboard that can be illuminated when in use has become a new development direction of the keyboard industry. Most of the conventional illuminated keyboards use a backlight module as a light source to achieve the function of illumination. In general, the backlight module of the conventional illuminated keyboard is composed of a light shielding plate, a light guiding plate, a reflecting plate and a light emitting diode. In addition, some illuminated keyboards have a metal plate (such as 'aluminum foil') attached to the back of the backlight module to prevent the illuminated keyboard from being damaged by electrostatic discharge (ESD). However, the arrangement of the aluminum foil causes an increase in the overall thickness of the illuminating keyboard, making the illuminating keyboard unfavorable for thinning. [New content] Therefore, one of the objects of the present invention is to provide a light-emitting keyboard suitable for thinning to solve the above problems. According to an embodiment, the illuminated keyboard of the present invention comprises a bottom plate, a plurality of buttons, 3 M408732 and a backlight module. A plurality of buttons are disposed on the bottom plate. The backlight module comprises a visor, a light guide plate, a metal plate and a reflective layer. The visor is disposed under the bottom plate, the light guide plate is disposed under the visor, the metal plate is disposed under the light guide plate, and the reflective layer is coated on the metal plate and under the light guide plate. In this embodiment, since the present invention applies a reflective layer on a metal plate to replace the conventional reflective plate, the overall thickness of the illuminated keyboard can reduce the thickness of the conventional reflective plate, so that the illuminated keyboard of the present invention Suitable for thin design. According to another embodiment, the illuminated keyboard of the present invention comprises a bottom plate, a plurality of buttons, and a skin light module. A plurality of buttons are disposed on the bottom plate. The backlight module comprises a visor, a light guide plate and a reflection plate, the light plate is disposed under the bottom plate, the light guide plate is disposed under the visor, and the anti-hybrid is disposed under the light guide plate. The light guide plate has a plurality of holes, and the reflection plate has a plurality of protrusions. Each of the projections passes through each of the holes - and is fixed to the lower surface of the shield. In this embodiment, since the present invention separates the protruding portion of the reflecting plate from the guiding hole of the reflecting plate to the lower surface of the light shielding plate, the reflecting plate does not need to carry out mosquitoes by using the additional adhesive and the light guiding plate. That is, the overall thickness of the illuminated keyboard 1 can reduce the thickness of the cymbal, so that the illuminating keyboard of the present invention is suitable for thinning. The π3030 can be further improved by the following details of the creation and the advantages and spirit of the drawing. Understanding. [Embodiment] Please refer to Fig. 1, and Fig. 1 is a cross-sectional view of the M408732 of the illuminated keyboard 1 according to an embodiment of the present invention. As shown in FIG. 1 , the illuminated keyboard includes a bottom plate 1 , a minus button 12 , and a backlight module 14 . Each of the buttons 12 is disposed on the bottom plate 1 , for the user to press 'and thereby perform the function desired by the user. The back set M is disposed under the bottom plate 10 to provide a light source for the illuminated keyboard 1 to emit light. In this embodiment, the illuminated keyboard 1 can further include a circuit board 16, and the button 12 can include a - key cap 120, a lifting support device 122, and an elastic member 124. The circuit board 16 is disposed on the bottom plate 1A. The lifting support device 122 and the elastic member 124 are disposed between the key cap 120 and the bottom plate 10. When the keycap 12 of the button 12 is pressed, the keycap 12〇n is vertically moved in the direction of the bottom plate 1 with the lifting and lowering device 122. The elastic member I% serves as the source of the keycap 12G minus the wire H) the upper and lower shafts. The elastic member 124 may be a rubber d〇me, but is not limited thereto. The circuit board has a switch corresponding to the button 12, such as a membrane switch or its trigger switch. When the keycap 120 is depressed, the resilient member 124 triggers the switch on the circuit board 16 to perform the function desired by the user. As shown in FIG. 1 , the backlight module 14 includes a light shielding plate 140 , a light guide plate 142 , a metal plate 144 , a reflective layer 146 , and a light emitting unit 148 . The light shielding plate 14 is disposed under the bottom plate 10, the light guide plate M2 is disposed under the light shielding plate 14, and the metal plate 144 is disposed under the light guide plate 142. The reflective layer 146 is coated on the metal plate 144 and under the light guide plate 142. The light emitting unit 148 is disposed on one side of the light guide plate 142, so that the light emitted by the light emitting unit 148 can be projected through the light guide plate 142 toward the bottom plate 1 。. In an actual application, the light-emitting unit 148 can be a light-emitting diode, but is not limited thereto. M408732 In this embodiment, the reflective layer 146 may be applied to the metal plate 144 in advance, and the metal plate 1Φ4 may be attached to the light guide plate 142. In practical applications, the metal plate 144 may be an aluminum foil and the reflective layer 146 may be a reflective ink (for example, a white ink), but is not limited thereto. The metal plate 144 is used to prevent the illuminated keyboard 1 from being damaged by electrostatic discharge (ESD). In addition, the reflective layer 146 is used to reflect the light emitted by the light-emitting unit 148 to increase the light-emitting effect of the illuminated keyboard 1. In this embodiment, since the present invention applies a reflective layer 146 on the metal plate 144 instead of the conventional reflective plate, the overall thickness of the illuminated keyboard can reduce the thickness of the conventional reflective plate, so that the creation The illuminated keyboard 丨 is suitable for thin design. FIG. 2 is a cross-sectional view of the illuminated keyboard 根据 according to another embodiment of the present invention. As shown in FIG. 2, the illuminated keyboard Γ is different from the above-mentioned illuminated keyboard 1 in that the light-emitting keyboard i, the backlight module 14, the light guide plate (4) has a double hole 1420 and a metal plate 144, which has a plurality of The protrusion 144〇. In addition, it can be pre-formed on the upper surface of the light board MG to form a complex number _ complement 1 tear, each of which can be M ^ J heart. Each of 1404 corresponds to one of the holes 1420. In practical applications, the soil P is private to the metal plate 144, the protrusion 1440 is stamped on, and the identification mark 1404 can be ink. The upper and lower embossing modes of the light guide plates M408732 • 142 are respectively passed through each of the protruding portions of the metal plate 144. Measurement. Next, the light shielding plate 140 is disposed on the light guide plate 142. This %' each identification mark 14〇4 is located above the corresponding hole 142〇, respectively. Then, by pressing each of the identification marks MG4, the protruding protrusions 1440 of the metal plate 144 can be fixed to the lower surface 14 of the light shielding plate, thereby fixing the light guide plate ία to the metal plate 144'. Between the visor 14 〇. It should be noted that the components in the second figure and the components not related to the i-th figure have the same principle and are not described here. _ π Referring to FIG. 3, FIG. 3 is a cross-sectional view of the illuminating keyboard 3 according to another embodiment of the present creation. As shown in Fig. 3, the main difference between the illuminated keyboard 3 and the above illuminated keyboard 1 is the design of the backlight module. Therefore, the backlight module 34 of the illuminated keyboard 3 will be described below. As shown in FIG. 3, the backlight module 34 of the illuminated keyboard 3 includes a light shielding plate 34, a light guide plate 342, a reflection plate 344, a metal plate 346, and a light emitting unit 348. The light shielding plate 340 is disposed under the bottom plate 3, the light guiding plate 342 is disposed under the light shielding plate 340, the reflective sliding plate 344 δ is placed under the light guiding plate 342, and the metal plate 346 is disposed under the reflecting plate 344. The metal plate 344 is used to prevent the illuminated keyboard 3 from being damaged by electrostatic discharge. In practical applications, the metal plate 344 may be aluminum foil, but not limited thereto. The light emitting unit 348 is disposed on one side of the light guide plate 342 such that light emitted from the light emitting unit 348 can be projected through the light guide plate 342 toward the bottom plate 30. In an actual application, the light-emitting unit 148 can be a light-emitting diode, but is not limited thereto. In this embodiment, the light guide plate 342 has a plurality of holes 3420, and the reflection plate 344 has a plurality of protrusions 3440. In addition, a plurality of identification marks 3404 may be formed in advance on the upper surface 3402 of the visor 340, wherein each of the identifications M408732 and 3404 respectively correspond to one of the holes 3420. In a practical application, the protrusions 3440 can be embossed on the reflector 344 by an imprint process, and the identification mark 3404 can be ink. When the backlight module 34 is assembled, the adhesive may be applied to each of the protrusions 3440 of the reflection plate 344, and then each of the protrusions 3440 of the reflection plate 344 may be respectively passed through the corresponding holes 3420 of the light guide plate 342. Next, the light shielding plate 34 is placed on the light guide plate 342. At this time, each of the identification marks 3404 is located above the corresponding hole 3420. Next, each of the identification marks 3404 is pressed. Thereby, the protruding portion 3440 of the reflecting plate 344 can be fixed to the lower surface 34 of the light shielding plate 340, thereby fixing the light guiding plate 342 between the reflecting plate 344 and the light shielding plate 340. In this embodiment, since the protrusion 344 of the reflector 344 is directly fixed to the lower surface 3400 of the visor 340 through the hole 3420 of the light guide plate 342, the reflector 344 does not need to be supplemented by an additional teacher and guide. The light plate 342 is fixed, that is, the overall thickness of the illuminated keyboard 3 can reduce the thickness of the turn, so that the illuminated keyboard 3 of the present invention is suitable for a thin design. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view of an illuminated keyboard according to the present creation embodiment. The figure is a schematic cross-sectional view of the illumination according to another embodiment of the present invention. The figure is a schematic cross-sectional view of an illuminated keyboard according to another embodiment of the present invention. Explanation of component symbols] 1, 1丨, 3 illuminated keyboard 10, 30 bottom plate 12 buttons 14, 14, 34, backlight module 16 circuit board 120 key cap 122 lifting support device 124 elastic member 140, 340 light shielding plate 142, 142' 342 Light guide plates 144, 144', 346 Metal plates 146 Reflective layers 148, 348 Light-emitting unit 344 Reflecting plates 1400, 3400 Lower surface 1402' 3402 Upper surface 1404, 3404 Identification marks 1420, 3420 Holes 1440, 3440 Projections.