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JP2004039327A - Key button for portable terminal, and portable terminal - Google Patents

Key button for portable terminal, and portable terminal Download PDF

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Publication number
JP2004039327A
JP2004039327A JP2002191919A JP2002191919A JP2004039327A JP 2004039327 A JP2004039327 A JP 2004039327A JP 2002191919 A JP2002191919 A JP 2002191919A JP 2002191919 A JP2002191919 A JP 2002191919A JP 2004039327 A JP2004039327 A JP 2004039327A
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JP
Japan
Prior art keywords
light
key button
resin
shielding
surface side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
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JP2002191919A
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Japanese (ja)
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JP4100059B2 (en
Inventor
Takayuki Kobayashi
小林 孝之
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NEC Corp
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NEC Corp
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Publication of JP2004039327A publication Critical patent/JP2004039327A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a key button that can develop an excellent design in case of making a design feature by irradiating the key button with light from the rear side formed by two-color injection molding method so as to have a light transmission part and a light shielding part, and a portable terminal having the key button. <P>SOLUTION: The key button is constructed so as to be provided with a light transmission part that is formed so as to transmit the light irradiated from the rear side of the key button to the surface side, a light shielding part that is formed so as not to transmit the light irradiated from the rear side of the key button to the surface side by shielding it, a recessed part for holding that is formed in recessed shape on the rear side of the light shielding part, and a light scattering part that is formed on the inner face of the holding recessed part and makes scatter the light irradiated from the rear side of the key button. Then, a mobile terminal having this key button is constructed. Since the holding recessed part does not interfere with the light transmitting through the light transmission part and the irradiating light is scattered by the light scattering part, it brings about variations of light intensity by mutually interfering, thus develops an excellent design feature. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は携帯端末用のキーボタンおよび携帯端末に関し、特に光透過部と光遮蔽部を有する携帯端末用のキーボタンおよびそれを備えた携帯端末に関する。
【0002】
【従来の技術】
携帯電話機に代表される携帯端末は多機能化の要求に加えて、そのデザイン性への要求も大きい。そのデザイン性への要求を満たすため、携帯端末の各構成部分において様々な工夫がなされており、操作部等に用いられるキーボタンもその対象となっている。例えば、キーボタンを光透過部と光遮蔽部で構成して、キーボタンの裏面側からLED(light−emitting diode)等の光を照射して光透過部のみを浮き上がらせるように発光させてデザイン性を出すことが考えられる。
【0003】
このような光透過部と光遮蔽部とからなる部材の成形方法として2色射出成形法がある。例えば、特開平9−174599には2色射出成形法により形成された、不透明部と透明部を有するパネルが記載されている。該パネルは、パネルの周辺部を構成する部分を不透明色樹脂で射出成形し、その上を覆う上層部および中央表示部を透明色樹脂で射出成形して形成される。射出成形に用いるコア型には、表示部を形成する突起部が設けられている。
【0004】
【発明が解決しようとする課題】
このような2色射出成形法では、1次成形キャビティから2次成形キャビティに成形体を移動させる際に、コア型に設けた突起部で成形体を保持して2次成形キャビティへと移動する。したがって、成形体にはコア型の突起部に対応する保持用凹部が形成される。
【0005】
光透過部と光遮蔽部を有するキーボタンを2色射出成形法によりを形成する場合も、同様に保持用凹部が形成される。そして、その裏面側から光を照射してデザイン性を出そうとする場合には、保持用凹部が影となって見えてしまいデザイン性を低下させることが考えられる。
【0006】
本発明は、このような問題点に鑑みてなされたもので、2色射出成形法で光透過部と光遮蔽部を有するように形成されたキーボタンに、その裏面側から光を照射してデザイン性を出す場合に、優れたデザイン性を発揮できるキーボタンを提供することを目的とする。また、このようなキーボタンを用いて優れたデザイン性を発揮できる携帯端末を提供することを目的とする。
【0007】
【課題を解決するための手段】
請求項1に記載の発明は、光透過性樹脂と光遮蔽性樹脂との2色射出成形法により成形される携帯端末用のキーボタンであって、前記光透過性樹脂からなる光透過性樹脂層のみで形成され、前記キーボタンの裏面側から照射される光を同表面側まで透過させるように形成された光透過部と、前記光遮蔽性樹脂からなる光遮蔽性樹脂層を含んで形成され、前記キーボタンの裏面側から照射される光を遮蔽して同表面側まで透過させないように形成された光遮蔽部と、前記光遮蔽部の裏面側に凹状に形成された保持用凹部と、を備えたことを特徴とする。
【0008】
請求項1に記載の発明によれば、保持用凹部を光遮蔽部の裏面側に設けたので、キーボタンの裏面側から光を照射してデザイン性を出す場合に、保持用凹部が光透過部を透過する光を邪魔することなく、優れたデザイン性を発揮する。なお、キーボタンの裏面側とは、携帯端末に装着されたときに携帯端末の内部に位置する側をいい、キーボタンの表面側とは、同携帯端末の外部に位置する側をいう(本明細書において、以下同様である)。
【0009】
請求項2に記載の発明は、請求項1に記載のキーボタンにおいて、前記保持用凹部の内面に形成され、前記キーボタンの裏面側から照射される光を散乱させる光散乱部と、を備えたことを特徴とする。
【0010】
請求項2に記載の発明によれば、キーボタンの裏面側から光を照射してデザイン性を出す場合に、照射されたが光散乱部で散乱されて、散乱された光が互いに干渉しあって光の強弱を生じさせ、その一部が光透過部に透過されて、優れたデザイン性を発揮する。
【0011】
請求項3に記載の発明は、光透過性樹脂を射出成形して一次成形体を成形し、該一次成形体の表面の一部を覆うように光遮蔽性樹脂を射出成形して二次成形体を成形する2色射出成形法により成形される携帯端末用のキーボタンであって、前記光遮蔽性樹脂の成形体で覆われない前記光透過性樹脂の成形層で形成され、前記キーボタンの裏面側から照射される光を同表面側まで透過させるように形成された光透過部と、前記光透過性樹脂の成形体を前記光遮蔽性樹脂の成形体で覆った部分で形成され、前記キーボタンの裏面側から照射される光を遮蔽して同表面側まで透過させないように形成された光遮蔽部と、前記光遮蔽部の前記キーボタンの裏面側に凹状に形成され、射出成形用金型が前記一次成形体を保持するための保持用凹部と、を備えたことを特徴とする。
【0012】
請求項3に記載の発明によれば、保持用凹部を光遮蔽部の裏面側に設けたので、キーボタンの裏面側から光を照射してデザイン性を出す場合に、保持用凹部が光透過部を透過する光を邪魔することなく、優れたデザイン性を発揮する。
【0013】
請求項4に記載の発明は、請求項3に記載のキーボタンにおいて、前記保持用凹部の内面に形成され、前記キーボタンの裏面側から照射される光を散乱させる光散乱部と、を備えたことを特徴とする。
【0014】
請求項4に記載の発明によれば、キーボタンの裏面側から光を照射してデザイン性を出す場合に、照射されたが光散乱部で散乱されて、散乱された光が互いに干渉しあって光の強弱を生じさせ、その一部が光透過部に透過されて、優れたデザイン性を発揮する。
【0015】
請求項5に記載の発明は、請求項2または4に記載のキーボタンにおいて、前記光散乱部は、前記保持用凹部の内面のうち、前記キーボタンの裏面側から照射される光を前記光透過部側に透過させる面に形成されたことを特徴とする。
【0016】
請求項5に記載の発明によれば、保持用凹部に照射された光を光散乱部で散乱させ、干渉により光の強弱を生じさせ後に光透過部側に透過させるので、保持用凹部により生じる影などによるデザイン性が低下するのを防止する。
【0017】
請求項6に記載の発明は、請求項5に記載のキーボタンにおいて、前記保持用凹部を柱状に形成し、前記光散乱部を前記保持用凹部の柱状側面を、異なる方向を向く複数の面で形成したことを特徴とする。
【0018】
請求項6に記載の発明によれば、保持用凹部に照射された光が異なる方向を向く複数の面で屈折され、屈折された光が互いに干渉して光の強弱を生じさせ後に光透過部側に透過するので、保持用凹部により生じる影などによるデザイン性が低下するのを防止する。
【0019】
請求項7に記載の発明は、請求項1乃至6の何れか一項に記載のキーボタンと、前記キーボタンの裏面側に配置して、前記キーボタンに対して光を照射する光照射部と、を備えた携帯端末である。
【0020】
請求項7に記載の発明によれば、光照射部がキーボタンに光を照射することで、優れたデザイン性が達成できる。
【0021】
【発明の実施の形態】
本発明の実施の形態について図面を参照して以下に説明する。
【0022】
(第1実施形態)
図1に本発明の第1実施形態にかかるキーボタンを示す。図1の(A)は同キーボタンの平面図、(B)は(A)におけるX−X断面側面図である。
【0023】
図1に示すように、携帯電話の操作用キーボタンであるキーボタン10は、光透過部11、光遮蔽部12、および保持用凹部13を備えており、下記で説明するように光透過性樹脂と光遮蔽性樹脂とを用いた2色射出成形法により一体成形されている。
【0024】
光透過部11は、光透過性樹脂層で形成されており、キーボタン10の裏面側に配置されたLED(light emitting diode)により照射された光を表面側に透過させる。
【0025】
光遮蔽部12は、光透過性樹脂層に光遮蔽性樹脂層を重ねて形成されており、キーボタン10の裏面側に配置されたLEDにより照射された光を表面側に透過させず遮蔽する。
【0026】
保持用凹部13は、光遮蔽部12の裏面側に略円柱凹状に形成され、下記で説明する2色射出成形時に成形金型がキーボタン10の中間製品である成形体を保持するのに用いられる。また、保持用凹部13は、光透過部11側に光散乱部14を備えている。光散乱部14は略円柱凹状に形成された保持用凹部13の光透過部側の側面を、断面複数の山型になるように配置された複数の面で形成されている。キーボタン10の裏面側に配置されたLEDにより照射された光は該複数の面で屈折され、屈折された光が互いに干渉し、光の強弱を作り出す。
【0027】
次に、キーボタン10を2色射出成形により一体成形する方法について図2および図3を参照して説明する。
【0028】
図2の(A)は2色射出成形に用いる金型の基本構造を示す断面図、(B)は(A)におけるコア型の突起部を示す部分斜視図である。図2(A)に示すように、射出成形金型20は、固定型21および回転型22で構成され、固定型21は1次側キャビティ型23と2次側キャビティ型24を備えており、回転型22はコア型25をそれぞれ1次側キャビティ23および2次側キャビティ24に対応する位置に備えている。回転型22は回転装置(図示せず)で180度回転するようになっている。図2(B)に示すように、コア型25の突起部26は略円柱状に形成されており、その一方側側面が複数の山型で切取られるように形成されている。
【0029】
この金型を用いた2色射出成形法によりキーボタン10を成形する手順について図3を参照して説明する。
【0030】
図3(A)は一次成形工程を示す。一次射出成形工程では、一次側キャビティ23とコア25とで形成された空洞部に、溶融した光透過性樹脂を射出充填し、その後冷却して一次成形体を得る。
【0031】
図3(B)および(C)は二次成形準備工程を示す。二次成形準備工程では、一次成形体を保持した状態でコア25を一次側キャビティ23から取出し(図3(B)参照)、回転型22を180℃回転して、コア25ともに一次成形体を二次側キャビティ24に装着する(図3(C)参照)。このとき、コア25は一次成形体(キーボタン10の中間製品)の保持用凹部13で一次成形体を保持する。
【0032】
図3(D)は二次成形工程を示す。二次成形工程では、二次側キャビティ24と一次成形体とで形成された空洞部に、溶融した光遮蔽性樹脂を射出充填し、その後冷却して2次成形体を得る。その後、必要に応じて不要部の取除き、研磨などの後仕上げをおこなってキーボタン10が得られる。
【0033】
次に、キーボタン10を装着した携帯電話について図4を参照して説明する。図4の(A)は選択操作ボタンとしてキーボタン10を用いた携帯電話の平面図、(B)は同携帯電話のキーボタン10の周辺を示す部分断面図である。
【0034】
図4(A)に示すように、携帯電話41の選択操作ボタン装着孔42にキーボタン10が装着される。また、図4(B)に示すように、携帯電話41の内部には、キーボタン10の裏面側にLED43が装着されており、LED43はキーボタン10の操作時等に発光してキーボタン10に光を照射するようになっている。携帯電話41のその他の部分については公知の携帯電話と同様であるので説明は省略する。
【0035】
携帯電話41のキーボタン10を操作したとき、LED43は発光しキーボタン10を裏面側から照光する。このとき、キーボタン10の光透過部11は光を透過するが、遮蔽部12は光を透過しないので、ユーザの目には、光透過部11のみから光が発せられているように見える。また、保持用凹部13に設けられた光散乱部14に照射された光は、光散乱部14を形成する各面で屈折され、屈折された光が互いに干渉して光の強弱を形成し、光透過部11側に出てくるので、ユーザの目に特別な刺激(美感)を与え、優れたデザイン性が発揮される。
【0036】
(第2実施形態)
図5(A)は第2実施形態にかかるキーボタンの平面図、図5(B)は図5(A)のY−Y断面側面図である。図5に示すように、第2実施形態にかかるキーボタン50は光散乱部を備えておらず、保持用凹部53の光透過部51側の面を平面で形成している。その他の部分は第1実施形態にかかるキーボタンと同じ構成、機能を有するので説明を省略する。
【0037】
キーボタン50の成形方法は、図8(A)に示す突起部を有するコア型を用いて成形する以外は、第1実施形態に係るキーボタンの成形方法と同様であるので説明を省略する。
【0038】
キーボタン50は第1実施形態にかかるキーボタンと同様に、携帯電話の選択操作ボタンなどとして用いられ、その裏面側に配置されたLEDで照光され、光透過部51から光を透過させてデザイン性を生じさせる。このとき、保持用凹部53は光遮蔽部52の裏面側に位置するので、光透過部51で透過される光の邪魔をすることがないため、デザイン性を低下させない。
【0039】
(第3実施形態)
図6(A)は第3実施形態にかかるキーボタンの平面図、図6(B)は図6(A)のZ−Z断面側面図である。図6に示すように、第3実施形態にかかるキーボタン60の光散乱部64はキーボタンの裏面側にいくにつれて断面積を大にするような三角錐の二側面を形成する複数の面で形成されている。光散乱部64以外の部分は第1実施形態にかかるキーボタンと同じ構成、機能を有するので説明を省略する。
【0040】
キーボタン60の成形方法は、図8(B)に示す突起部を有するコア型を用いて成形する以外は、第1実施形態に係るキーボタンの成形方法と同様であるので説明を省略する。
【0041】
キーボタン60は第1実施形態にかかるキーボタンと同様に、携帯電話の選択操作ボタンなどとして用いられ、その裏面側に配置されたLEDで照光され、光透過部61から光を透過させてデザイン性を生じさせる。また、保持用凹部63に設けられた光散乱部64に照射された光は、光散乱部64を形成する各面で屈折され、屈折された光が互いに干渉して光の強弱を形成し、光透過部61側に出てくるので、ユーザの目に特別な刺激(美感)を与え、優れたデザイン性が発揮される。
【0042】
(第4実施形態)
図7(A)は第4実施形態にかかるキーボタンの平面図、図7(B)は図7(A)のW−W断面側面図である。図7に示すように、第4実施形態にかかるキーボタン70の光散乱部74は断面が半円状の複数の面で形成されている。光散乱部74以外の部分は第1実施形態にかかるキーボタンと同じ構成、機能を有するので説明を省略する。
【0043】
キーボタン70の成形方法は、図8(C)に示す突起部を有するコア型を用いて成形する以外は、第1実施形態に係るキーボタンの成形方法と同様であるので説明を省略する。
【0044】
キーボタン70は第1実施形態にかかるキーボタンと同様に、携帯電話の選択操作ボタンなどとして用いられ、その裏面側に配置されたLEDで照光され、光透過部71から光を透過させてデザイン性を生じさせる。また、保持用凹部73に設けられた光散乱部74に照射された光は、光散乱部74を形成する各面で屈折され、屈折された光が互いに干渉して光の強弱を形成し、光透過部71側に出てくるので、ユーザの目に特別な刺激(美感)を与え、優れたデザイン性が発揮される。
【0045】
(他の実施形態)
以上の実施形態では、キーボタンを平面視で楕円形に形成した例を示したが、これに限られるものではなく平面視で矩形であっても良い。また、同様に保持用凹部も凹部状に形成されていればどのような形状でも良い。
【0046】
また、携帯端末として携帯電話機の例を示したが、PHS(personal handyphone system)端末やPDA(personal digital assistant)などのキーボタンを備えた携帯端末に対しても適用できる。
【0047】
【発明の効果】
以上の説明した通り、本発明によれば、保持用凹部を光遮蔽部の裏面側に設けたので、キーボタンの裏面側から光を照射してデザイン性を出す場合に、保持用凹部が光透過部を透過する光を邪魔することがなく、また、照射された光が光散乱部で散乱されて、散乱された光が互いに干渉しあって光の強弱を生じさせ、その一部が光透過部に透過されて、優れたデザイン性を発揮する。
【図面の簡単な説明】
【図1】(A)第1実施形態にかかるキーボタンの平面図、(B)(A)のX−X断面側面図である。
【図2】2色射出成形法に用いる金型の基本構造を示す断面図である。
【図3】2色射出成形法を用いてキーボタンを成形する手順を説明する図である。
【図4】(A)キーボタンを装着した携帯電話の平面図、(B)同携帯電話のキーボタン周辺部の部分断面図である。
【図5】(A)第2実施形態にかかるキーボタンの平面図、(B)(A)のY−Y断面側面図である。
【図6】(A)第3実施形態にかかるキーボタンの平面図、(B)(A)のZ−Z断面側面図である。
【図7】(A)第4実施形態にかかるキーボタンの平面図、(B)(A)のW−W断面側面図である。
【図8】(A)第2実施形態にかかるキーボタンの製造に用いるコア型の突起部の斜視図、(B)第3実施形態にかかるキーボタンの製造に用いるコア型の突起部の斜視図、(C)第4実施形態にかかるキーボタンの製造に用いるコア型の突起部の斜視図である。
【符号の説明】
10 キーボタン
11 光透過部
12 光遮蔽部
13 保持用凹部
14 光散乱部
23 1次側キャビティ型
24 2次側キャビティ型
25 コア型
26 突起部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a key button for a portable terminal and a portable terminal, and more particularly to a key button for a portable terminal having a light transmitting portion and a light shielding portion, and a portable terminal having the same.
[0002]
[Prior art]
A portable terminal represented by a portable telephone has a great demand for design in addition to a demand for multifunctionality. In order to satisfy the demand for the design, various contrivances are made in each component of the portable terminal, and the key buttons used for the operation unit and the like are also targeted. For example, a key button is composed of a light transmitting part and a light shielding part, and is illuminated by irradiating light such as an LED (light-emitting diode) from the back side of the key button so that only the light transmitting part is raised. It is conceivable to show sex.
[0003]
There is a two-color injection molding method as a molding method of such a member including the light transmitting portion and the light shielding portion. For example, JP-A-9-174599 describes a panel having an opaque portion and a transparent portion formed by a two-color injection molding method. The panel is formed by injection-molding a portion constituting a peripheral portion of the panel with an opaque color resin and injection-molding an upper layer portion and a central display portion covering the upper portion with a transparent color resin. The core mold used for injection molding is provided with a projection for forming a display unit.
[0004]
[Problems to be solved by the invention]
In such a two-color injection molding method, when the molded body is moved from the primary molding cavity to the secondary molding cavity, the molded body is held by the projection provided on the core mold and moved to the secondary molding cavity. . Therefore, the holding recess corresponding to the protrusion of the core mold is formed in the molded body.
[0005]
When a key button having a light transmitting portion and a light shielding portion is formed by a two-color injection molding method, a holding recess is formed in the same manner. If light is to be applied from the back side to achieve design, the holding recess may be seen as a shadow and the design may be degraded.
[0006]
The present invention has been made in view of such a problem, and irradiates light from the back side to a key button formed to have a light transmitting portion and a light shielding portion by a two-color injection molding method. An object of the present invention is to provide a key button capable of exhibiting excellent design when exhibiting design. It is another object of the present invention to provide a mobile terminal that can exhibit excellent design using such key buttons.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is a key button for a portable terminal formed by a two-color injection molding method of a light-transmitting resin and a light-shielding resin, wherein the light-transmitting resin is made of the light-transmitting resin. A light-transmitting portion formed of only a layer and formed so as to transmit light emitted from the back side of the key button to the same surface side, and a light-shielding resin layer made of the light-shielding resin. A light shielding portion formed so as to block light emitted from the back surface side of the key button and not transmit the light to the front surface side, and a holding recess formed in a concave shape on the back surface side of the light shielding portion. , Is provided.
[0008]
According to the first aspect of the present invention, since the holding recess is provided on the back surface side of the light shielding portion, when the design is achieved by irradiating light from the back side of the key button, the holding recess is transparent. Demonstrates excellent design without disturbing light passing through the part. The back side of the key button refers to the side located inside the portable terminal when attached to the portable terminal, and the front side of the key button refers to the side located outside the portable terminal (this book). In the description, the same applies hereinafter).
[0009]
According to a second aspect of the present invention, in the key button according to the first aspect, the key button further includes a light scattering portion formed on an inner surface of the holding recess and scattering light emitted from a back side of the key button. It is characterized by having.
[0010]
According to the second aspect of the present invention, when light is emitted from the back side of the key button to enhance the design, the emitted light is scattered by the light scattering portion, and the scattered lights interfere with each other. In this case, the intensity of light is generated, and a part of the light is transmitted to the light transmitting portion, thereby exhibiting excellent design.
[0011]
According to a third aspect of the present invention, a light-transmitting resin is injection-molded to form a primary molded article, and a light-shielding resin is injection-molded so as to cover a part of the surface of the primary molded article. A key button for a portable terminal molded by a two-color injection molding method for molding a body, wherein the key button is formed by a molding layer of the light transmitting resin which is not covered with the molding of the light shielding resin. A light transmitting portion formed so as to transmit light emitted from the back surface side to the front surface side, and a portion formed by covering the molded product of the light transmissive resin with the molded product of the light shielding resin, A light shielding portion formed so as to shield light emitted from the back surface side of the key button and not transmit to the same surface side, and a concave shape formed on the back surface side of the key button of the light shielding portion, and injection molding. A holding recess for holding the primary molded body, And it said that there were pictures.
[0012]
According to the third aspect of the present invention, since the holding recess is provided on the back surface side of the light shielding portion, when the design is achieved by irradiating light from the back surface side of the key button, the holding recess is transparent. Demonstrates excellent design without disturbing light passing through the part.
[0013]
According to a fourth aspect of the present invention, in the key button according to the third aspect, a light scattering portion is formed on an inner surface of the holding recess and scatters light emitted from a back side of the key button. It is characterized by having.
[0014]
According to the fourth aspect of the present invention, when light is emitted from the back side of the key button to enhance the design, the emitted light is scattered by the light scattering portion, and the scattered lights interfere with each other. In this case, the intensity of light is generated, and a part of the light is transmitted to the light transmitting portion, thereby exhibiting excellent design.
[0015]
According to a fifth aspect of the present invention, in the key button according to the second or fourth aspect, the light scattering portion emits light irradiated from a back surface side of the key button among inner surfaces of the holding recess. It is characterized in that it is formed on a surface that transmits light to the transmitting portion side.
[0016]
According to the fifth aspect of the present invention, the light applied to the holding recess is scattered by the light scattering portion, the intensity of the light is generated by interference, and the light is transmitted to the light transmitting portion side. It prevents the design from being deteriorated due to shadows and the like.
[0017]
According to a sixth aspect of the present invention, in the key button according to the fifth aspect, the holding concave portion is formed in a column shape, and the light scattering portion is formed by a plurality of surfaces that face the column side surface of the holding concave portion in different directions. It is characterized by being formed by.
[0018]
According to the invention as set forth in claim 6, the light applied to the holding concave portion is refracted on a plurality of surfaces facing different directions, and the refracted lights interfere with each other to generate light intensity, and then the light transmitting portion. Since the light is transmitted to the side, it is possible to prevent a reduction in design due to a shadow or the like generated by the holding recess.
[0019]
According to a seventh aspect of the present invention, there is provided a key button according to any one of the first to sixth aspects, and a light irradiating unit arranged on a back side of the key button to irradiate the key button with light. And a mobile terminal comprising:
[0020]
According to the invention described in claim 7, the light irradiating section irradiates the key button with light, thereby achieving excellent design.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0022]
(1st Embodiment)
FIG. 1 shows key buttons according to the first embodiment of the present invention. 1A is a plan view of the key button, and FIG. 1B is a cross-sectional side view taken along line XX in FIG.
[0023]
As shown in FIG. 1, a key button 10, which is an operation key button of a mobile phone, includes a light transmitting portion 11, a light shielding portion 12, and a holding concave portion 13, and has a light transmitting portion as described below. It is integrally molded by a two-color injection molding method using a resin and a light shielding resin.
[0024]
The light transmitting portion 11 is formed of a light transmitting resin layer, and transmits light emitted by an LED (light emitting diode) disposed on the back surface side of the key button 10 to the front surface side.
[0025]
The light-shielding portion 12 is formed by superposing a light-shielding resin layer on a light-transmitting resin layer, and shields light emitted by an LED disposed on the back side of the key button 10 without transmitting the light to the front side. .
[0026]
The holding concave portion 13 is formed in a substantially cylindrical concave shape on the back surface side of the light shielding portion 12, and is used for holding a molded body whose molding die is an intermediate product of the key button 10 during two-color injection molding described below. Can be In addition, the holding recess 13 includes a light scattering section 14 on the light transmission section 11 side. The light scattering portion 14 is formed by a plurality of surfaces arranged such that the side surface of the holding concave portion 13 formed in a substantially cylindrical concave shape on the light transmitting portion side has a plurality of mountain shapes in cross section. The light emitted by the LED arranged on the back side of the key button 10 is refracted on the plurality of surfaces, and the refracted lights interfere with each other to create the intensity of the light.
[0027]
Next, a method of integrally molding the key button 10 by two-color injection molding will be described with reference to FIGS.
[0028]
2A is a cross-sectional view showing a basic structure of a mold used for two-color injection molding, and FIG. 2B is a partial perspective view showing a projection of the core mold in FIG. As shown in FIG. 2A, the injection mold 20 includes a fixed mold 21 and a rotary mold 22. The fixed mold 21 includes a primary cavity mold 23 and a secondary cavity mold 24, The rotary mold 22 has a core mold 25 at positions corresponding to the primary side cavity 23 and the secondary side cavity 24, respectively. The rotary mold 22 is configured to rotate 180 degrees by a rotating device (not shown). As shown in FIG. 2B, the projection 26 of the core mold 25 is formed in a substantially columnar shape, and one side surface thereof is formed so as to be cut out by a plurality of mountain shapes.
[0029]
The procedure for molding the key button 10 by the two-color injection molding method using this mold will be described with reference to FIG.
[0030]
FIG. 3A shows a primary molding step. In the primary injection molding step, a cavity formed by the primary side cavity 23 and the core 25 is injection-filled with a molten light-transmitting resin, and then cooled to obtain a primary molded body.
[0031]
FIGS. 3B and 3C show a secondary molding preparation step. In the secondary molding preparation step, the core 25 is taken out from the primary side cavity 23 while holding the primary molded body (see FIG. 3B), and the rotary mold 22 is rotated by 180 ° C. to form the primary molded body together with the core 25. It is mounted in the secondary side cavity 24 (see FIG. 3C). At this time, the core 25 holds the primary molded body in the holding concave portion 13 of the primary molded body (an intermediate product of the key button 10).
[0032]
FIG. 3D shows a secondary molding step. In the secondary molding step, the cavity formed by the secondary side cavity 24 and the primary molded body is injected and filled with a molten light shielding resin, and then cooled to obtain a secondary molded body. After that, if necessary, unnecessary portions are removed and post-finishing such as polishing is performed to obtain the key button 10.
[0033]
Next, a mobile phone equipped with the key button 10 will be described with reference to FIG. FIG. 4A is a plan view of a mobile phone using key buttons 10 as selection operation buttons, and FIG. 4B is a partial cross-sectional view showing the periphery of the key buttons 10 of the mobile phone.
[0034]
As shown in FIG. 4A, the key button 10 is mounted in the selection operation button mounting hole 42 of the mobile phone 41. As shown in FIG. 4B, inside the mobile phone 41, an LED 43 is mounted on the back side of the key button 10. The LED 43 emits light when the key button 10 is operated or the like, and emits light when the key button 10 is operated. Is irradiated with light. The other parts of the mobile phone 41 are the same as those of a known mobile phone, and a description thereof will be omitted.
[0035]
When the key button 10 of the mobile phone 41 is operated, the LED 43 emits light and illuminates the key button 10 from the back side. At this time, the light transmitting portion 11 of the key button 10 transmits light, but the shielding portion 12 does not transmit light, so that the user sees that light is emitted only from the light transmitting portion 11. Further, the light applied to the light scattering portion 14 provided in the holding recess 13 is refracted on each surface forming the light scattering portion 14, and the refracted lights interfere with each other to form light intensity, Since the light comes out to the light transmitting portion 11 side, a special stimulus (beauty) is given to the user's eyes, and excellent design is exhibited.
[0036]
(2nd Embodiment)
FIG. 5A is a plan view of a key button according to the second embodiment, and FIG. 5B is a cross-sectional side view taken along line YY of FIG. 5A. As shown in FIG. 5, the key button 50 according to the second embodiment does not include a light scattering portion, and the surface of the holding concave portion 53 on the light transmitting portion 51 side is formed as a plane. The other parts have the same configuration and functions as the key buttons according to the first embodiment, and thus description thereof will be omitted.
[0037]
The method for forming the key button 50 is the same as the method for forming the key button according to the first embodiment, except that the key button 50 is formed using a core mold having a protrusion shown in FIG.
[0038]
Like the key button according to the first embodiment, the key button 50 is used as a selection operation button or the like of a mobile phone, is illuminated by an LED disposed on the back side thereof, and transmits light from the light transmitting portion 51 to design. Cause sexuality. At this time, since the holding concave portion 53 is located on the back surface side of the light shielding portion 52, it does not obstruct the light transmitted through the light transmitting portion 51, so that the design is not degraded.
[0039]
(Third embodiment)
FIG. 6A is a plan view of a key button according to the third embodiment, and FIG. 6B is a cross-sectional side view taken along the line ZZ of FIG. 6A. As shown in FIG. 6, the light scattering portion 64 of the key button 60 according to the third embodiment includes a plurality of surfaces forming two sides of a triangular pyramid whose cross-sectional area increases toward the back side of the key button. Is formed. Portions other than the light scattering portion 64 have the same configuration and functions as the key buttons according to the first embodiment, and thus description thereof will be omitted.
[0040]
The method for forming the key button 60 is the same as the method for forming the key button according to the first embodiment, except that the key button 60 is formed using a core mold having a protrusion shown in FIG.
[0041]
Like the key buttons according to the first embodiment, the key buttons 60 are used as selection operation buttons of a mobile phone, and are illuminated by an LED disposed on the back side thereof, and are designed by transmitting light from the light transmitting portion 61. Cause sexuality. Further, the light applied to the light scattering portion 64 provided in the holding concave portion 63 is refracted on each surface forming the light scattering portion 64, and the refracted lights interfere with each other to form light intensity, Since the light comes out to the light transmitting portion 61 side, a special stimulus (beauty) is given to the user's eyes, and excellent design is exhibited.
[0042]
(Fourth embodiment)
FIG. 7A is a plan view of a key button according to the fourth embodiment, and FIG. 7B is a cross-sectional side view taken along line WW of FIG. 7A. As shown in FIG. 7, the light scattering portion 74 of the key button 70 according to the fourth embodiment is formed of a plurality of surfaces having a semicircular cross section. Portions other than the light scattering section 74 have the same configuration and function as the key buttons according to the first embodiment, and thus description thereof will be omitted.
[0043]
The method of forming the key button 70 is the same as the method of forming the key button according to the first embodiment, except that the key button 70 is formed using a core mold having a protrusion shown in FIG.
[0044]
Like the key buttons according to the first embodiment, the key button 70 is used as a selection operation button of a mobile phone, and is illuminated by an LED disposed on the back side thereof, and is designed by transmitting light from the light transmitting portion 71. Cause sexuality. Further, the light applied to the light scattering portion 74 provided in the holding concave portion 73 is refracted on each surface forming the light scattering portion 74, and the refracted lights interfere with each other to form light intensity, Since the light comes out to the light transmitting portion 71 side, a special stimulus (beauty) is given to the user's eyes, and excellent design is exhibited.
[0045]
(Other embodiments)
In the above embodiment, an example in which the key buttons are formed in an elliptical shape in a plan view has been described. However, the present invention is not limited to this. Similarly, the holding concave portion may have any shape as long as it is formed in a concave shape.
[0046]
Further, an example of a mobile phone as a mobile terminal has been described. However, the present invention can be applied to a mobile terminal having a key button such as a PHS (personal handyphone system) terminal or a PDA (personal digital assistant).
[0047]
【The invention's effect】
As described above, according to the present invention, since the holding recess is provided on the back surface of the light shielding portion, when the design is achieved by irradiating light from the back surface of the key button, the holding recess is made of light. The transmitted light does not disturb the transmitted light, and the irradiated light is scattered by the light scattering part, and the scattered lights interfere with each other to generate light intensity, and a part of the light is It is transmitted by the transmission part and exhibits excellent design.
[Brief description of the drawings]
FIG. 1A is a plan view of a key button according to a first embodiment, and FIG. 1B is a cross-sectional side view taken along line XX of FIG. 1A.
FIG. 2 is a sectional view showing a basic structure of a mold used for a two-color injection molding method.
FIG. 3 is a diagram illustrating a procedure for molding a key button using a two-color injection molding method.
FIG. 4A is a plan view of a mobile phone equipped with key buttons, and FIG. 4B is a partial cross-sectional view of a part around the key buttons of the mobile phone.
FIG. 5A is a plan view of a key button according to a second embodiment, and FIGS. 5B and 5A are cross-sectional side views taken along the line YY in FIG.
FIG. 6A is a plan view of a key button according to the third embodiment, and FIGS. 6B and 6A are cross-sectional side views taken along line ZZ of FIG.
FIG. 7A is a plan view of a key button according to a fourth embodiment, and FIGS. 7B and 7B are cross-sectional side views taken along line WW of FIG.
FIG. 8A is a perspective view of a core-shaped projection used for manufacturing a key button according to the second embodiment, and FIG. 8B is a perspective view of a core-shaped projection used for manufacturing a key button according to the third embodiment. FIG. 9C is a perspective view of a core-shaped projection used for manufacturing the key button according to the fourth embodiment.
[Explanation of symbols]
Reference Signs List 10 key button 11 light transmitting part 12 light shielding part 13 holding concave part 14 light scattering part 23 primary cavity mold 24 secondary cavity mold 25 core mold 26 protrusion

Claims (7)

光透過性樹脂と光遮蔽性樹脂との2色射出成形法により成形される携帯端末用のキーボタンであって、
前記光透過性樹脂からなる光透過性樹脂層のみで形成され、前記キーボタンの裏面側から照射される光を同表面側まで透過させるように形成された光透過部と、
前記光遮蔽性樹脂からなる光遮蔽性樹脂層を含んで形成され、前記キーボタンの裏面側から照射される光を遮蔽して同表面側まで透過させないように形成された光遮蔽部と、
前記光遮蔽部の裏面側に凹状に形成された保持用凹部と、を備えたことを特徴とするキーボタン。
A key button for a portable terminal formed by a two-color injection molding method of a light transmitting resin and a light shielding resin,
A light transmitting portion formed only of the light transmitting resin layer made of the light transmitting resin and formed so as to transmit light irradiated from the back surface side of the key button to the same surface side,
A light-shielding portion formed including a light-shielding resin layer made of the light-shielding resin, and formed so as to shield light emitted from the back side of the key button and not transmit the light to the same surface side,
A key button, comprising: a concave holding portion formed in a concave shape on the back surface side of the light shielding portion.
請求項1に記載のキーボタンにおいて、
前記保持用凹部の内面に形成され、前記キーボタンの裏面側から照射される光を散乱させる光散乱部と、を備えたことを特徴とするキーボタン。
The key button according to claim 1,
A key button, comprising: a light scattering portion formed on an inner surface of the holding recess and scattering light emitted from a back side of the key button.
光透過性樹脂を射出成形して一次成形体を成形し、該一次成形体の表面の一部を覆うように光遮蔽性樹脂を射出成形して二次成形体を成形する2色射出成形法により成形される携帯端末用のキーボタンであって、
前記光遮蔽性樹脂の成形体で覆われない前記光透過性樹脂の成形層で形成され、前記キーボタンの裏面側から照射される光を同表面側まで透過させるように形成された光透過部と、
前記光透過性樹脂の成形体を前記光遮蔽性樹脂の成形体で覆った部分で形成され、前記キーボタンの裏面側から照射される光を遮蔽して同表面側まで透過させないように形成された光遮蔽部と、
前記光遮蔽部の前記キーボタンの裏面側に凹状に形成され、射出成形用金型が前記一次成形体を保持するための保持用凹部と、を備えたことを特徴とするキーボタン。
A two-color injection molding method in which a light-transmissive resin is injection-molded to form a primary molded body, and a light-shielding resin is injection-molded to cover a part of the surface of the primary molded body to form a secondary molded body. A key button for a mobile terminal formed by
A light transmitting portion formed of a molding layer of the light transmitting resin that is not covered with the molding of the light shielding resin, and formed to transmit light irradiated from the back surface side of the key button to the same surface side. When,
It is formed at a portion where the molded body of the light transmitting resin is covered with the molded body of the light shielding resin, and is formed so as to shield light emitted from the back side of the key button and not transmit the light to the same side. Light shielding part,
A key button, comprising: a recess formed on the back surface side of the key button of the light shielding portion; and a holding recess for holding the primary molded body by an injection mold.
請求項3に記載のキーボタンにおいて、
前記保持用凹部の内面に形成され、前記キーボタンの裏面側から照射される光を散乱させる光散乱部と、を備えたことを特徴とするキーボタン。
The key button according to claim 3,
A key button, comprising: a light scattering portion formed on an inner surface of the holding recess and scattering light emitted from a back side of the key button.
請求項2または4に記載のキーボタンにおいて、
前記光散乱部は、前記保持用凹部の内面のうち、前記キーボタンの裏面側から照射される光を前記光透過部側に透過させる面に形成されたことを特徴とするキーボタン。
The key button according to claim 2 or 4,
The key button, wherein the light scattering portion is formed on a surface of the inner surface of the holding recess that transmits light emitted from a back surface side of the key button to the light transmitting portion side.
請求項5に記載のキーボタンにおいて、
前記保持用凹部を柱状に形成し、前記光散乱部を前記保持用凹部の柱状側面を、異なる方向を向く複数の面で形成したことを特徴とするキーボタン。
The key button according to claim 5,
A key button, wherein the holding recess is formed in a columnar shape, and the light scattering portion is formed by forming a plurality of side surfaces of the pillar of the holding recess in different directions.
請求項1乃至6の何れか一項に記載のキーボタンと、
前記キーボタンの裏面側に配置して、前記キーボタンに対して光を照射する光照射部と、を備えた携帯端末。
A key button according to any one of claims 1 to 6,
A portable terminal comprising: a light irradiating unit arranged on the back side of the key button to irradiate the key button with light.
JP2002191919A 2002-07-01 2002-07-01 Key button for portable terminal and portable terminal Expired - Fee Related JP4100059B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100805659B1 (en) 2006-11-03 2008-02-21 동진기업 주식회사 Cell phone case with confirmation window of LCD module manufactured by double injection molding method
JP2009181893A (en) * 2008-01-31 2009-08-13 Kyocera Corp Small electronic equipment
CN101819377A (en) * 2009-02-26 2010-09-01 Hoya株式会社 Method for evaluating multi-gray scale photomas
CN101989042A (en) * 2009-07-29 2011-03-23 Hoya株式会社 Method of manufacturing multi-gray scale photomask and pattern transfer method
US9691572B2 (en) 2010-02-18 2017-06-27 Nec Platforms, Ltd. Key button
CN107749908A (en) * 2017-11-21 2018-03-02 王凯玄 A kind of front camera light filling mobile phone shell

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100805659B1 (en) 2006-11-03 2008-02-21 동진기업 주식회사 Cell phone case with confirmation window of LCD module manufactured by double injection molding method
JP2009181893A (en) * 2008-01-31 2009-08-13 Kyocera Corp Small electronic equipment
CN101819377A (en) * 2009-02-26 2010-09-01 Hoya株式会社 Method for evaluating multi-gray scale photomas
CN101819377B (en) * 2009-02-26 2012-10-10 Hoya株式会社 Method for evaluating multi-gray scale photomas
CN101989042A (en) * 2009-07-29 2011-03-23 Hoya株式会社 Method of manufacturing multi-gray scale photomask and pattern transfer method
CN101989042B (en) * 2009-07-29 2013-08-07 Hoya株式会社 Method of manufacturing multi-gray scale photomask and pattern transfer method
US9691572B2 (en) 2010-02-18 2017-06-27 Nec Platforms, Ltd. Key button
CN107749908A (en) * 2017-11-21 2018-03-02 王凯玄 A kind of front camera light filling mobile phone shell
CN107749908B (en) * 2017-11-21 2019-11-22 王凯玄 A kind of front camera light filling mobile phone shell

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