JP3633177B2

JP3633177B2 - Method for manufacturing decorative member

Info

Publication number: JP3633177B2
Application number: JP02309397A
Authority: JP
Inventors: 俊二南; 博行園田
Original assignee: Casio Computer Co Ltd
Current assignee: Casio Computer Co Ltd
Priority date: 1997-01-23
Filing date: 1997-01-23
Publication date: 2005-03-30
Anticipated expiration: 2017-01-23
Also published as: JPH10206560A

Description

【０００１】
【発明の属する技術分野】
この発明は、化粧部材の製造方法に関する。
【０００２】
【従来の技術】
従来、光透過性部材の表面に金属薄膜を形成し、レーザー照射機を用いて金属薄膜面にレーザー光線を照射して微細な凹凸状のマーキングを行ったり、時計用文字盤の表面に金属薄膜を重ねてポンチ工具を用いてドット状の凹窪を形成したりするものがあった。
【０００３】
【発明が解決しようとする課題】
しかしながら、光透過性部材の表面に金属薄膜を形成し、レーザー照射機を用いて金属薄膜面にレーザー光線を照射して微細な凹凸状のマーキングを行う場合は、大掛かりな製造装置が必要となり製造コストも掛かるという欠点があった。また、時計用文字盤の表面に金属薄膜を重ねてポンチ工具を用いてドット状の凹窪を形成するものは、手作業により均等な製品が得られずコストも掛かるという欠点があった。
この発明の課題は、簡単に凹凸を形成して装飾性のあるものを得ることができるようにすることである。
【０００４】
【課題を解決するための手段】
請求項１記載の発明は、裏面に発光部材が設けられた光透過性部材の表面を凹凸形状に形成し、この光透過性部材の凹凸形状の全表面に光反射被膜を形成した後、凹凸形状の凸部の先端部のみを光反射被膜と共にカットして凸部の先端部を平坦面に形成して露出させるとともに、凹凸形状の凹部に光反射被膜を光反射被膜部として残すことを特徴とする。
この請求項１記載の発明によれば、光透過性部材の裏面に発光部材を設けることができる。そして、光透過性部材の凹凸形状の全表面に光反射被膜を形成した後、凹凸形状の凸部の先端部のみを光反射被膜と共にカットすることにより、凸部の先端部を平坦面に形成して露出させることができるとともに、凹部に光反射被膜を光反射被膜部として残すことができるので、照明機能を有するとともに装飾性のある化粧部材を簡単に製造することができる。
また、請求項２記載の発明は、前記凹凸形状は、凹凸形状の溝であり、この溝は、縦横格子状に形成されていることを特徴とする。この請求項２記載の発明によれば、光透過性部材の上面に規則的な凹凸形状を形成することができる。
更に、請求項３記載の発明は、前記凹凸形状は、 V 字状の溝であり、この溝は、縦横格子状に形成されていることを特徴とする。この請求項３記載の発明によれば、光透過性部材の上面に規則的な V 字形状の溝を形成することができる。
【０００５】
請求項４記載の発明は、光透過性部材の表面を凹凸形状に形成し、この光透過性部材の凹凸形状の全表面に光反射被膜を形成した後、凹凸形状の凸部の先端部のみを光反射被膜と共にカットして凸部の先端部を平坦面に形成して露出させるとともに、凹凸形状の凹部に光反射被膜を光反射被膜部として残すことを特徴とする。
この請求項４記載の発明によれば、光透過性部材の凹凸形状の全表面に光反射被膜を形成した後、凹凸形状の凸部の先端部のみを光反射被膜と共にカットすることにより、凸部の先端部を平坦面に形成して露出させることができるとともに、凹部に光反射被膜を光反射被膜部として残すことができるので、装飾性のある化粧部材を簡単に製造することができる。
また、請求項５記載の発明は、前記凹凸形状は、凹凸形状の溝であり、この溝は、縦横格子状に形成されていることを特徴とする。この請求項５記載の発明によれば、光透過性部材の上面に規則的な凹凸形状を形成することができる。
更に、請求項６記載の発明は、前記凹凸形状は、 V 字状の溝であり、この溝は、縦横格子状に形成されていることを特徴とする。この請求項６記載の発明によれば、光透過性部材の上面に規則的な V 字形状の溝を形成することができる。
【０００６】
【発明の実施の形態】
［第１実施形態］
以下、図１〜図５を参照して、この発明の化粧部材を電子腕時計に適用した第１実施形態について説明する。
図１は電子腕時計の要部拡大断面図である。この図において、１は腕時計ケースである。この腕時計ケース１の上面には時計ガラス２が装着され、腕時計ケース１の内部には時計モジュール３が収納され、腕時計ケース１の下面には裏蓋４が防水リング４ａを介して取り付けられている。
時計モジュール３は、ハウジング５を備え、このハウジング５の上面に文字板としての化粧板（化粧部材）６が押え板７によって取り付けられ、ハウジング５内にアナログムーブメント８が設けられ、このアナログムーブメント８の指針軸９が化粧板６に形成された貫通孔６ａを通してその上方に突出し、この突出した指針軸９の上部に時針および分針などの指針１０が取り付けられた構造になっている。この場合、化粧板６の上面の周縁部には、１時〜１２時などを表す文字や図形などの時字（マーク部）１６が設けられている。
【０００７】
化粧板６は、図２に示すように、上面が凹凸形状に形成された光透過性部材１１と、この光透過性部材１１の凹凸形状の凹部１２に形成された光反射被膜部である金属被膜部１３と、光透過性部材１１の下面に設けられたＥＬパネル（発光部材）１５とからなっている。光透過性部材１１は、透明または半透明のガラスや合成樹脂からなる板状のもので、その上面に図２および図３に示すように断面「Ｖ」字状の溝が縦横格子状に形成され、これにより上面が凹部１２と凸部１４とからなる凹凸形状に形成され、この凹凸形状の凸部１４の先端部が平坦面１４ａに形成された構造になっている。光反射被膜部である金属被膜部１３は、アルミニウムやクロムなどの金属からなり、光透過性部材１１の断面「Ｖ」字状の凹部１２の内面のみにほぼ均一な膜厚で形成され、これにより凸部１４の平坦面１４ａを露出させる構造になっている。ＥＬパネル１５は、電界の印加によって発光する有機物または無機物のＥＬ層を電極板間に設けた電界発光素子である。
【０００８】
次に、このような化粧板６の製造方法について、図４（ａ）および図４（ｂ）を参照して説明する。
まず、図４（ａ）に示すように、光透過性部材１１の上面に断面「Ｖ」字状の溝を縦横に格子状に形成することにより、光透過性部材１１の上面に断面「Ｖ」字状の凹部１２、およびこの凹部１２によって囲われた四角錐状の凸部１４を形成する。そして、これら凹部１２および凸部１４が形成された光透過性部材１１の上面、つまり凹部１２および凸部１４の全表面にアルミニウムやクロムなどの金属を蒸着して金属被膜１７をほぼ均一な膜厚で形成する。
この後、図４（ｂ）に示すように、凸部１４の先端部のみを金属被膜１７と共に研磨作業などによりカットして、凸部１４の先端部を平坦面１４ａに形成する。これにより、凸部１４の平坦面１４ａが上方に露出し、凹部１２の内面のみに金属被膜１７が金属被膜部１３として残る。なお、この後は、光透過性部材１１の下面にＥＬパネル１５を取り付ければ良い。
【０００９】
このような指針式時計の化粧板６では、ＥＬパネル１５を点灯させると、図５（ａ）に示すように、ＥＬパネル１５の光が光透過性部材１１の凸部１４の平坦面１４ａから上方に出射する。このとき、凹部１２が断面「Ｖ」字状に形成されているため、ＥＬパネル１５の光が金属被膜部１３によって遮られることが少なく、しかも金属被膜部１３に遮られても、この金属被膜部１３で反射され、この反射光がＥＬパネル１５の上面で再び反射され、この反射を繰り返して凸部１４の平坦面１４ａから出射される。このため、光透過部材１１の上面に金属被膜部１３を形成しても、出射光量の低下が少なく、ＥＬパネル１５の光を効率良く出射させることができる。これにより、指針１０を良好に照明することができ、暗い所でも確実に時刻を目視することができる。また、明るい所でＥＬパネル１５を消灯させた場合には、図５（ｂ）に示すように、光透過性部材１１の上面に形成された金属被膜部１３によって外部光が反射されるため、光透過性部材１１の上面が金属的に見え、このため金属感のある文字板を得ることができ、高級感の高い電子腕時計を得ることができる。
【００１０】
この場合、光透過性部材１１は、凹凸形状の凸部１４の先端部が平坦面１４ａに形成されているので、化粧板６の上面が全体的にほぼフラットな平面となり、このため光透過性部材１１の上面に文字や図形などの時字１６を印刷や貼付などによって良好に設けることができる。
また、この化粧板６は、光透過性部材１１の凹凸形状の上面全体に金属被膜１７を形成した後、凹凸形状の凸部１４の先端部を金属被膜１７と共にカットすることにより、凸部１４の先端部を平坦面１４ａに形成して露出させることができるとともに、凹部１２に金属被膜１７を金属被膜部１３として残すことができるので、研磨などの簡単な作業で容易に製造することができる。
【００１１】
なお、上記第１実施形態では、光透過性部材１１の前面全体を凹凸形状に形成したが、これに限らず、例えば図６（ａ）〜図６（ｃ）に示すように、凹凸形状に形成される光透過性部材１１の表面に時字形成領域１８を設け、この時字形成領域１８を平坦面に形成し、この時字形成領域１８に時字１６を印刷により形成しても良い。この場合には、図６（ａ）に示すように、光透過性部材１１の表面を凹凸形状に形成するとともに、この表面に予め平坦な時字形成領域１８を形成し、この光透過性部材１１の全表面に金属被膜１７を形成する。この後、図６（ｂ）に示すように、凹凸形状の凸部１４の先端部および時字形成領域１８の表面を金属被膜１７と共にカットし、凸部１４の先端部および時字形成領域１８の表面を平坦面に形成して露出させるとともに、凹部１２に金属被膜１７を金属被膜部１３として残す。そして、図６（ｃ）に示すように、平坦面に形成された時字形成領域１８の表面に時字１６を印刷により形成すれば良い。このようにすれば、時字１６を時字形成領域１８に良好に印刷することができる。
【００１２】
［第２実施形態］
次に、図７〜図１０を参照して、この発明の化粧部材の第２実施形態について説明する。なお、図１〜図５に示された第１実施形態と同一部分には同一符号を付し、その説明は省略する。
この化粧板（化粧部材）２０は、図７に示すように、上面が凹凸形状に形成された光透過性部材２１と、この光透過性部材２１の凹凸形状の凹部２２に形成された光反射被膜部である金属被膜部２３と、光透過性部材２１の下面に設けられたＥＬパネル１５とからなっている。光透過性部材２１は、第１実施形態と同様、透明または半透明のガラスや合成樹脂からなる板状のもので、その上面に図７および図８に示すように断面が矩形状をなす溝が縦横格子状に形成され、これにより上面が凹部２２と凸部２４とからなる凹凸形状に形成され、この凹凸形状の凸部２４の先端部が平坦面２４ａに形成された構造になっている。金属被膜部２３は、第１実施形態と同様、アルミニウムやクロムなどの金属からなり、光透過性部材２１の凹部２２の内面のみにほぼ均一な膜厚で形成され、これにより凸部２４の平坦面２４ａが露出した構造になっている。
【００１３】
このような化粧板２０の製造方法について、図９（ａ）および図９（ｂ）を参照して説明する。
まず、図９（ａ）に示すように、光透過性部材２１の上面に断面矩形状の溝を縦横に格子状に形成することにより、光透過性部材２１の上面に断面矩形状の凹部２２、およびこの凹部２２によって囲われた四角柱状の凸部２４を形成する。そして、これら凹部２２および凸部２４が形成された光透過性部材２１の上面、つまり凹部２２および凸部２４の全表面にアルミニウムやクロムなどの金属を蒸着して金属被膜１７をほぼ均一な膜厚で形成する。
この後、図９（ｂ）に示すように、凸部２４の先端部のみを金属被膜１７と共に研磨作業などによりカットして、凸部２４の先端部を平坦面２４ａに形成する。これにより、凸部２４の平坦面２４ａが上方に露出し、凹部２２の内面のみに金属被膜１７が金属被膜部２３として残る。なお、この後は、光透過性部材２１の下面にＥＬパネル１５を取り付ければ良い。
【００１４】
このような化粧板２０では、第１実施形態と同様、ＥＬパネル１５を点灯させると、図１０（ａ）に示すように、ＥＬパネル１５の光が光透過性部材２１の凸部２４の平坦面２４ａから上方に出射する。このとき、ＥＬパネル１５の光が金属被膜部２３に遮られても、この金属被膜部２３で反射され、反射された一部の光はそのまま凸部２４の平坦面２４ａから出射され、また他の一部の反射光はＥＬパネル１５の上面で再び反射され、この反射を繰り返して凸部２４の平坦面２４ａから出射される。このため、光透過部材２１の上面に金属被膜部２３を形成しても、第１実施形態と同様、出射光量の低下が少なく、ＥＬパネル１５の光を効率良く出射させることができ、これにより指針１０を良好に照明することができ、暗い所でも確実に時刻を目視することができる。また、明るい所でＥＬパネル１５を消灯させた場合には、図１０（ｂ）に示すように、光透過性部材２１の上面に形成された金属被膜部２３によって外部光が反射されるため、光透過性部材２１の上面が金属的に見え、金属感のある化粧板６を得ることができる。
【００１５】
このような化粧板２０を電子腕時計の文字板として用いれば、第１実施形態と同様、金属感のある文字板を得ることができ、高級感の高い電子腕時計を得ることができる。
また、この化粧板２０は、光透過性部材２１の凹凸形状の上面全体に金属被膜１７を形成した後、凹凸形状の凸部２４の先端部を金属被膜１７と共にカットすることにより、凸部２４の先端部を平坦面２４ａに形成して露出させることができるとともに、凹部２２に金属被膜１７を金属被膜部２３として残すことができるので、第１実施形態と同様、研磨などの簡単な作業で容易に製造することができる。
【００１６】
なお、上記第１、第２実施形態では、光透過性部材１１、２１の上面に溝を縦横格子状に形成して、上面を規則的な凹凸形状に形成したが、これに限らず、光透過性部材の上面に凹部と凸部とを不規則に形成することにより、光透過性部材の上面を不規則な凹凸形状に形成しても良い。
また、上記第１、第２実施形態では、凹凸形状に形成された光透過性部材１１、２１の凹部１２、２２の内面に金属被膜部１３、２３を形成したが、これに限らず、凸部の表面に金属被膜部１３、２３を形成し、凹部１２、２２の底部を露出させても良い。
また、上記第１、第２実施形態では、光透過性部材１１、２１の表面に金属被膜部１３、２３を設けたが、必ずしも金属被膜部１３、２３である必要はなく、光を反射する被膜部であれば、どのような素材であっても良い。
【００１７】
また、上記第１、第２実施形態では、発光部材として、ＥＬパネル１５を用いた場合について述べたが、これに限らず、例えばプラズマ方式の平面発光パネル、蓄光材を用いた平面発光パネル、発光ダイオードを配列した平面発光パネルなどでも良く、また平面発光パネルに限らず、蛍光管やランプなどを用いても良い。
さらに、上記第１、第２実施形態では、化粧板６、２０を電子腕時計の文字板として用いた場合について述べたが、これに限らず、例えばトラベルウオッチ、置き時計、掛け時計などにも適用できるほか、特に広告用の文字や図形などのマーク部を化粧板６、２０に設けることにより、ネオンサインや看板などの広告装置としても広く適用することができる。
【００１８】
【発明の効果】
以上説明したように、請求項１記載の発明によれば、光透過性部材の裏面に発光部材を設けることができる。そして、光透過性部材の表面を凹凸形状に形成し、この光透過性部材の凹凸形状の全表面に光反射被膜を形成した後、凹凸形状の凸部の先端部のみを光反射被膜と共にカットすることにより、凸部の先端部を平坦面に形成して露出させることができるとともに、凹部に光反射被膜を光反射被膜部として残すことができるので、照明機能を有するとともに装飾性のある化粧部材を簡単に製造することができる。
また、請求項２記載の発明によれば、光透過性部材の上面に規則的な凹凸形状を形成することができる。
また、請求項３記載の発明によれば、光透過性部材の上面に規則的な V 字形状の溝を形成することができる。
【００１９】
また、請求項４記載の発明によれば、光透過性部材の表面を凹凸形状に形成し、この光透過性部材の凹凸形状の全表面に光反射被膜を形成した後、凹凸形状の凸部の先端部のみを光反射被膜と共にカットすることにより、凸部の先端部を平坦面に形成して露出させることができるとともに、凹部に光反射被膜を光反射被膜部として残すことができるので、装飾性のある化粧部材を簡単に製造することができる。
また、請求項５記載の発明によれば、光透過性部材の上面に規則的な凹凸形状を形成することができる。
更に、請求項６記載の発明によれば、光透過性部材の上面に規則的な V 字形状の溝を形成することができる。
【図面の簡単な説明】
【図１】この発明の化粧部材を電子腕時計に適用した第１実施形態の要部拡大断面図。
【図２】図１の化粧板の要部拡大断面図。
【図３】図２の要部拡大平面図。
【図４】図２の化粧板の製造方法を示し、（ａ）は光透過性部材の凹凸形状の表面に金属被膜を形成した状態の断面図、（ｂ）は光透過性部材の凸部の先端部を金属被膜と共にカットした状態の断面図。
【図５】図２の化粧板の使用状態を示し、（ａ）はＥＬパネルを点灯させたときの光路状態を示した図、（ｂ）はＥＬパネルを消灯させたときの外部光の光路状態を示した図。
【図６】第１実施形態の光透過性部材の変形例を示し、（ａ）は凹凸形状に形成された光透過西部材の表面に時字形成領域を平坦に形成し、その全表面に金属被膜を形成した状態の断面図、（ｂ）は光透過性部材の凸部の先端部および時字形成領域の表面を金属被膜と共にカットした状態の断面図、（ｃ）はその時字形成領域の表面に時字を形成した状態の断面図。
【図７】この発明の化粧部材の第２実施形態を示した要部拡大断面図。
【図８】図７の要部拡大平面図。
【図９】図７の化粧板の製造方法を示し、（ａ）は光透過性部材の凹凸形状の表面に金属被膜を形成した状態の断面図、（ｂ）は光透過性部材の凸部の先端部を金属被膜と共にカットした状態の断面図。
【図１０】図７の化粧板の使用状態を示し、（ａ）はＥＬパネルを点灯させたときの光路状態を示した図、（ｂ）はＥＬパネルを消灯させたときの外部光の光路状態を示した図。
【符号の説明】
６、２０化粧板
１１、２１光透過性部材
１２、２２凹部
１３、２３金属被膜部
１４、２４凸部
１５ＥＬパネル
１６時字
１７金属被膜
１８時字形成領域[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a decorative member.
[0002]
[Prior art]
Conventionally, a metal thin film is formed on the surface of a light-transmitting member, and a laser beam is used to irradiate the metal thin film surface with a laser beam to perform fine uneven marking, or a metal thin film is formed on the surface of a watch dial. Some have formed a dot-like depression using a punch tool.
[0003]
[Problems to be solved by the invention]
However, if a metal thin film is formed on the surface of the light-transmitting member and a laser beam is irradiated on the surface of the metal thin film to perform fine uneven marking, a large manufacturing device is required and the manufacturing cost There was a drawback that it also took. In addition, when a metal thin film is overlapped on the surface of the timepiece dial and a dot-like depression is formed using a punch tool, there is a drawback that an equal product cannot be obtained manually and costs are increased.
An object of the present invention is to make it possible to easily form irregularities and obtain a decorative one.
[0004]
[Means for Solving the Problems]
In the invention according to claim 1, the surface of the light transmissive member having the light emitting member provided on the back surface is formed in a concavo-convex shape, and the light reflecting film is formed on the entire surface of the concavo-convex shape of the light transmissive member. Only the tip of the convex part of the shape is cut with the light reflecting film to form and expose the tip part of the convex part on a flat surface, and the light reflecting film is left as the light reflecting film part in the concave and convex part And
According to the first aspect of the present invention, the light emitting member can be provided on the back surface of the light transmitting member. Then, after forming a light-reflective coating on the entire concave-convex surface of the light transmitting member, only the tip of the concave-convex convex portion is cut together with the light-reflective coating to form the convex portion on a flat surface. In addition, since the light reflecting coating can be left as a light reflecting coating in the recess, it is possible to easily manufacture a decorative member having an illumination function and a decorative property.
The invention according to claim 2 is characterized in that the concavo-convex shape is a concavo-convex groove, and the groove is formed in a vertical and horizontal lattice shape. According to the second aspect of the present invention, a regular uneven shape can be formed on the upper surface of the light transmitting member.
Furthermore, the invention according to claim 3 is characterized in that the concavo-convex shape is a V -shaped groove, and the groove is formed in a vertical and horizontal lattice shape. According to the third aspect of the present invention, regular V -shaped grooves can be formed on the upper surface of the light transmitting member .
[0005]
In the invention according to claim 4, after the surface of the light transmissive member is formed in a concavo-convex shape and a light reflecting film is formed on the entire surface of the concavo-convex shape of the light transmissive member, only the tip of the concavo-convex convex portion is formed. Is cut together with the light-reflecting film to form and expose the tip of the convex part on a flat surface, and the light-reflecting film is left as a light-reflecting film part in the concave and convex portions.
According to the fourth aspect of the present invention, after the light reflecting film is formed on the entire surface of the concavo-convex shape of the light transmitting member, only the tip of the concavo-convex convex portion is cut together with the light reflecting coating, thereby Since the tip part of the part can be formed and exposed on a flat surface, and the light reflecting film can be left as a light reflecting film part in the recess, a decorative decorative member can be easily manufactured.
The invention according to claim 5 is characterized in that the uneven shape is a groove having an uneven shape, and the grooves are formed in a vertical and horizontal lattice shape. According to the fifth aspect of the present invention, a regular uneven shape can be formed on the upper surface of the light transmissive member.
Further, the invention according to claim 6 is characterized in that the uneven shape is a V -shaped groove, and the groove is formed in a vertical and horizontal lattice shape. According to the sixth aspect of the present invention, regular V -shaped grooves can be formed on the upper surface of the light transmitting member .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
Hereinafter, a first embodiment in which the decorative member of the present invention is applied to an electronic wristwatch will be described with reference to FIGS.
FIG. 1 is an enlarged cross-sectional view of a main part of an electronic wristwatch. In this figure, 1 is a wristwatch case. A watch glass 2 is mounted on the upper surface of the watch case 1, a watch module 3 is housed inside the watch case 1, and a back cover 4 is attached to the lower surface of the watch case 1 via a waterproof ring 4a. .
The timepiece module 3 includes a housing 5, a decorative plate (decorative member) 6 as a dial plate is attached to the upper surface of the housing 5 by a presser plate 7, an analog movement 8 is provided in the housing 5, and the analog movement 8 The pointer shaft 9 protrudes upward through a through hole 6a formed in the decorative plate 6, and a pointer 10 such as an hour hand and a minute hand is attached to the upper portion of the protruding pointer shaft 9. In this case, a time letter (mark part) 16 such as a character or a figure representing 1 o'clock to 12 o'clock or the like is provided on the peripheral edge of the upper surface of the decorative board 6.
[0007]
As shown in FIG. 2, the decorative plate 6 is a metal that is a light-reflective coating formed on a light-transmitting member 11 having an uneven upper surface and a concave-convex recess 12 of the light-transmitting member 11. The coating part 13 and an EL panel (light emitting member) 15 provided on the lower surface of the light transmissive member 11 are formed. The light transmissive member 11 is a plate made of transparent or translucent glass or synthetic resin, and grooves having a V-shaped cross section are formed in a vertical and horizontal lattice pattern on the upper surface thereof as shown in FIGS. As a result, the upper surface is formed in a concavo-convex shape composed of the concave portion 12 and the convex portion 14, and the tip portion of the concavo-convex convex portion 14 is formed on the flat surface 14a. The metal coating portion 13 which is a light reflecting coating portion is made of a metal such as aluminum or chromium, and is formed with a substantially uniform film thickness only on the inner surface of the concave portion 12 having a “V” -shaped cross section of the light transmitting member 11. Thus, the flat surface 14a of the convex portion 14 is exposed. The EL panel 15 is an electroluminescent element in which an organic or inorganic EL layer that emits light when an electric field is applied is provided between electrode plates.
[0008]
Next, the manufacturing method of such a decorative board 6 is demonstrated with reference to Fig.4 (a) and FIG.4 (b).
First, as shown in FIG. 4A, grooves having a V-shaped cross section are formed in a lattice shape vertically and horizontally on the upper surface of the light transmissive member 11, thereby forming a cross section “V” on the upper surface of the light transmissive member 11. ”-Shaped concave portion 12 and a quadrangular pyramid-shaped convex portion 14 surrounded by the concave portion 12 are formed. Then, a metal film 17 is formed by depositing a metal such as aluminum or chromium on the upper surface of the light-transmitting member 11 on which the concave portions 12 and the convex portions 14 are formed, that is, on the entire surfaces of the concave portions 12 and the convex portions 14. Form with thickness.
Thereafter, as shown in FIG. 4B, only the tip of the convex portion 14 is cut together with the metal film 17 by a polishing operation or the like to form the tip of the convex portion 14 on the flat surface 14a. Thereby, the flat surface 14 a of the convex portion 14 is exposed upward, and the metal coating 17 remains as the metal coating portion 13 only on the inner surface of the concave portion 12. After that, the EL panel 15 may be attached to the lower surface of the light transmissive member 11.
[0009]
In the decorative plate 6 of such a pointer type timepiece, when the EL panel 15 is turned on, the light of the EL panel 15 is transmitted from the flat surface 14a of the convex portion 14 of the light transmitting member 11 as shown in FIG. Emits upward. At this time, since the concave portion 12 is formed in a “V” cross section, the light of the EL panel 15 is hardly blocked by the metal coating portion 13, and even if the metal coating portion 13 blocks the light, Reflected by the portion 13, the reflected light is reflected again by the upper surface of the EL panel 15, and this reflection is repeated and emitted from the flat surface 14 a of the convex portion 14. For this reason, even if the metal coating portion 13 is formed on the upper surface of the light transmission member 11, the amount of emitted light is hardly reduced and the light of the EL panel 15 can be emitted efficiently. Thereby, the pointer 10 can be illuminated well, and the time can be reliably visually observed even in a dark place. Further, when the EL panel 15 is turned off in a bright place, as shown in FIG. 5B, the external light is reflected by the metal coating portion 13 formed on the upper surface of the light transmissive member 11, The upper surface of the light-transmitting member 11 looks metallic, so that a dial with a metallic feeling can be obtained, and a high-quality electronic wristwatch can be obtained.
[0010]
In this case, in the light transmissive member 11, since the tip of the concavo-convex convex portion 14 is formed on the flat surface 14 a, the upper surface of the decorative plate 6 becomes a substantially flat plane as a whole. Time characters 16 such as letters and figures can be satisfactorily provided on the upper surface of the member 11 by printing or pasting.
Further, the decorative plate 6 is formed by forming the metal film 17 on the entire upper surface of the concavo-convex shape of the light transmitting member 11, and then cutting the tip of the concavo-convex convex portion 14 together with the metal coating 17, thereby forming the convex portion 14. Can be formed and exposed on the flat surface 14a, and the metal coating 17 can be left as the metal coating 13 in the recess 12, so that it can be easily manufactured by a simple operation such as polishing. .
[0011]
In addition, in the said 1st Embodiment, although the whole front surface of the light transmissive member 11 was formed in uneven | corrugated shape, it is not restricted to this, For example, as shown to Fig.6 (a)-FIG.6 (c), it is uneven | corrugated shape. A time character forming region 18 may be provided on the surface of the light transmissive member 11 to be formed, the time character forming region 18 may be formed on a flat surface, and the time character 16 may be formed in the time character forming region 18 by printing. . In this case, as shown in FIG. 6 (a), the surface of the light transmissive member 11 is formed in a concavo-convex shape, and a flat time character forming region 18 is formed in advance on this surface. A metal film 17 is formed on the entire surface 11. Thereafter, as shown in FIG. 6B, the tip of the concavo-convex convex portion 14 and the surface of the time character forming region 18 are cut together with the metal film 17, and the tip portion of the convex portion 14 and the time character forming region 18 are cut. The metal film 17 is left as a metal film portion 13 in the recess 12. Then, as shown in FIG. 6C, the time characters 16 may be formed by printing on the surface of the time character forming region 18 formed on the flat surface. In this way, it is possible to print the time character 16 in the time character forming region 18 satisfactorily.
[0012]
[Second Embodiment]
Next, with reference to FIGS. 7-10, 2nd Embodiment of the decorative member of this invention is described. In addition, the same code | symbol is attached | subjected to the same part as 1st Embodiment shown by FIGS. 1-5, and the description is abbreviate | omitted.
As shown in FIG. 7, the decorative plate (decorative member) 20 includes a light-transmitting member 21 having an uneven upper surface and a light reflecting member formed in the concave-convex concave portion 22 of the light-transmitting member 21. The metal film part 23 which is a film part, and the EL panel 15 provided on the lower surface of the light transmissive member 21 are included. As in the first embodiment, the light transmissive member 21 is a plate-shaped member made of transparent or translucent glass or synthetic resin, and has a rectangular cross section on its upper surface as shown in FIGS. Is formed in a vertical and horizontal lattice shape, whereby the upper surface is formed in a concavo-convex shape composed of the concave portion 22 and the convex portion 24, and the tip of the concavo-convex convex portion 24 is formed on the flat surface 24a. . As in the first embodiment, the metal coating portion 23 is made of a metal such as aluminum or chromium, and is formed with a substantially uniform film thickness only on the inner surface of the concave portion 22 of the light transmissive member 21, thereby flattening the convex portion 24. The surface 24a is exposed.
[0013]
The manufacturing method of such a decorative board 20 is demonstrated with reference to Fig.9 (a) and FIG.9 (b).
First, as shown in FIG. 9A, a groove having a rectangular cross section is formed on the upper surface of the light transmissive member 21 in the form of a grid in the vertical and horizontal directions. , And a quadrangular prism-shaped convex portion 24 surrounded by the concave portion 22. Then, a metal film 17 is formed by depositing a metal such as aluminum or chromium on the upper surface of the light-transmitting member 21 in which the concave portions 22 and the convex portions 24 are formed, that is, on the entire surfaces of the concave portions 22 and the convex portions 24. Form with thickness.
Thereafter, as shown in FIG. 9B, only the tip of the convex portion 24 is cut together with the metal film 17 by a polishing operation or the like to form the tip of the convex portion 24 on the flat surface 24a. Thereby, the flat surface 24 a of the convex portion 24 is exposed upward, and the metal coating 17 remains as the metal coating portion 23 only on the inner surface of the concave portion 22. After this, the EL panel 15 may be attached to the lower surface of the light transmissive member 21.
[0014]
In such a decorative plate 20, as in the first embodiment, when the EL panel 15 is turned on, the light of the EL panel 15 is flat on the convex portion 24 of the light transmissive member 21 as shown in FIG. The light exits upward from the surface 24a. At this time, even if the light of the EL panel 15 is blocked by the metal coating portion 23, it is reflected by the metal coating portion 23, and a part of the reflected light is emitted as it is from the flat surface 24 a of the convex portion 24. Part of the reflected light is reflected again on the upper surface of the EL panel 15, and this reflection is repeated to be emitted from the flat surface 24 a of the convex portion 24. For this reason, even if the metal coating portion 23 is formed on the upper surface of the light transmission member 21, the light emission amount is not decreased much and the light of the EL panel 15 can be efficiently emitted, as in the first embodiment. The pointer 10 can be illuminated well, and the time can be surely seen even in a dark place. Further, when the EL panel 15 is turned off in a bright place, as shown in FIG. 10B, the external light is reflected by the metal film portion 23 formed on the upper surface of the light transmissive member 21, The upper surface of the light transmissive member 21 looks metallic, and the decorative board 6 with a metallic feeling can be obtained.
[0015]
If such a decorative board 20 is used as a dial of an electronic wristwatch, a dial with a metallic feeling can be obtained as in the first embodiment, and an electronic wristwatch with a high-class feeling can be obtained.
In addition, the decorative plate 20 is formed by forming the metal film 17 on the entire upper surface of the concavo-convex shape of the light transmitting member 21, and then cutting the tip of the concavo-convex convex portion 24 together with the metal coating 17 to thereby form the convex portion 24. Can be formed and exposed on the flat surface 24a, and the metal coating 17 can be left in the recess 22 as the metal coating 23, so that, as in the first embodiment, a simple operation such as polishing can be performed. It can be manufactured easily.
[0016]
In the first and second embodiments, the grooves are formed in a vertical and horizontal lattice shape on the upper surfaces of the light transmissive members 11 and 21, and the upper surface is formed in a regular concavo-convex shape. The upper surface of the light transmissive member may be formed into an irregular concavo-convex shape by irregularly forming concave portions and convex portions on the upper surface of the transmissive member.
Moreover, in the said 1st, 2nd embodiment, although the metal coating parts 13 and 23 were formed in the inner surface of the recessed parts 12 and 22 of the light-transmitting members 11 and 21 formed in uneven | corrugated shape, it is not restricted to this, but convex The metal coating portions 13 and 23 may be formed on the surface of the portion, and the bottoms of the recesses 12 and 22 may be exposed.
Moreover, in the said 1st, 2nd embodiment, although the metal coating parts 13 and 23 were provided in the surface of the light transmissive members 11 and 21, it does not necessarily need to be the metal coating parts 13 and 23, and reflects light. Any material may be used as long as it is a coating part.
[0017]
In the first and second embodiments, the case where the EL panel 15 is used as the light emitting member has been described. However, the present invention is not limited thereto, and for example, a plasma type flat light emitting panel, a flat light emitting panel using a phosphorescent material, A flat light emitting panel or the like in which light emitting diodes are arranged may be used, and not only the flat light emitting panel but also a fluorescent tube or a lamp may be used.
Furthermore, in the first and second embodiments, the case where the decorative plates 6 and 20 are used as the dial of an electronic wristwatch has been described. However, the present invention is not limited thereto, and can be applied to, for example, a travel watch, a table clock, a wall clock, and the like. In particular, by providing mark portions such as characters and figures for advertisement on the decorative plates 6 and 20, the present invention can be widely applied as an advertising device such as a neon sign or a signboard.
[0018]
【The invention's effect】
As described above, according to the first aspect of the present invention, the light emitting member can be provided on the back surface of the light transmissive member. Then, the surface of the light transmissive member is formed in a concavo-convex shape, a light reflecting film is formed on the entire surface of the concavo-convex shape of the light transmissive member, and then only the tip of the concavo-convex convex portion is cut together with the light reflecting film. By doing so, the tip of the convex part can be formed and exposed on a flat surface, and the light reflecting film can be left as a light reflecting film part in the concave part, so that it has an illumination function and a decorative makeup. The member can be easily manufactured.
Moreover, according to the invention of Claim 2, regular uneven | corrugated shape can be formed in the upper surface of a light transmissive member.
According to the invention of claim 3, regular V -shaped grooves can be formed on the upper surface of the light transmitting member .
[0019]
According to the invention of claim 4, the surface of the light transmissive member is formed in a concavo-convex shape, and the light reflective coating is formed on the entire surface of the concavo-convex shape of the light transmissive member, and then the concavo-convex convex portion. By cutting only the tip of the light-reflecting film together with the light-reflective coating, the tip of the convex part can be formed and exposed on a flat surface, and the light-reflective coating can be left as a light-reflective coating part in the concave part. A decorative decorative member can be easily produced.
Moreover, according to the invention of Claim 5, regular uneven | corrugated shape can be formed in the upper surface of a light transmissive member.
Furthermore, according to the sixth aspect of the present invention, regular V -shaped grooves can be formed on the upper surface of the light transmitting member .
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a main part of a first embodiment in which a decorative member of the present invention is applied to an electronic wristwatch.
2 is an enlarged cross-sectional view of a main part of the decorative board of FIG.
3 is an enlarged plan view of a main part of FIG.
4A and 4B show a manufacturing method of the decorative board of FIG. 2, in which FIG. Sectional drawing of the state which cut the front-end | tip part with the metal film.
5A and 5B show the usage state of the decorative board of FIG. 2, in which FIG. 5A shows the optical path state when the EL panel is turned on, and FIG. 5B shows the optical path of external light when the EL panel is turned off. The figure which showed the state.
6A and 6B show a modification of the light transmissive member of the first embodiment. FIG. 6A is a plan view in which a time-character formation region is formed flat on the surface of the light transmissive western member formed in a concavo-convex shape and is formed on the entire surface. Sectional view of the state in which the metal film is formed, (b) is a sectional view of the state where the tip of the convex portion of the light transmitting member and the surface of the time character forming region are cut together with the metal film, (c) is the time character forming region Sectional drawing of the state which formed the time character on the surface.
FIG. 7 is an enlarged cross-sectional view showing a main part of a decorative member according to a second embodiment of the present invention.
8 is an enlarged plan view of a main part of FIG.
9A and 9B show a manufacturing method of the decorative board of FIG. 7, in which FIG. Sectional drawing of the state which cut the front-end | tip part with the metal film.
10A and 10B show a usage state of the decorative board of FIG. 7, in which FIG. 10A shows an optical path state when the EL panel is turned on, and FIG. 10B shows an optical path of external light when the EL panel is turned off. The figure which showed the state.
[Explanation of symbols]
6, 20 Decorative plate 11, 21 Light transmissive member 12, 22 Recess 13, 23 Metal coating 14, 24 Projection 15 EL panel 16 Time character 17 Metal coating 18 Time character formation region

Claims

After forming the surface of the light transmissive member having a light emitting member on the back surface in a concavo-convex shape, and forming a light reflecting film on the entire surface of the concavo-convex shape of the light transmissive member, the tip of the concavo-convex convex portion And the light-reflecting film is cut off together with the light-reflecting film to form and expose the tip of the convex part on a flat surface, and the light-reflecting film is left as a light-reflective film part in the concave-convex shape. Manufacturing method of member.

The method for manufacturing a decorative member according to claim 1, wherein the uneven shape is a groove having an uneven shape, and the grooves are formed in a vertical and horizontal lattice shape.

2. The method of manufacturing a decorative member according to claim 1, wherein the uneven shape is a V-shaped groove, and the groove is formed in a vertical and horizontal lattice shape.

After forming the surface of the light transmissive member into a concavo-convex shape and forming a light reflective coating on the entire surface of the concavo-convex shape of the light transmissive member, only the tip of the convex portion of the concavo-convex shape is cut together with the light reflective coating. And the front-end | tip of the said convex part is formed and exposed on a flat surface, The said light reflection film is left as a light reflection film part in the said uneven | corrugated shaped recessed part, The manufacturing method of the decorative member characterized by the above-mentioned.

5. The method for manufacturing a decorative member according to claim 4, wherein the uneven shape is a groove having an uneven shape, and the grooves are formed in a vertical and horizontal lattice shape.

The uneven shape is V The method for manufacturing a decorative member according to claim 4, wherein the groove is a letter-shaped groove, and the groove is formed in a vertical and horizontal grid pattern.