JP2012071449A - Key cap and manufacturing method thereof - Google Patents

Key cap and manufacturing method thereof Download PDF

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JP2012071449A
JP2012071449A JP2010216799A JP2010216799A JP2012071449A JP 2012071449 A JP2012071449 A JP 2012071449A JP 2010216799 A JP2010216799 A JP 2010216799A JP 2010216799 A JP2010216799 A JP 2010216799A JP 2012071449 A JP2012071449 A JP 2012071449A
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molded product
primary molded
keycap
mold
key cap
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JP5697390B2 (en
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Toshiyuki Katsube
利幸 勝部
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NEC Personal Computers Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a key cap capable of presenting an actual size appearance and a manufacturing method thereof.SOLUTION: A primary molded article 25 is formed by using a mold, as a first outside mold 22, of which lateral lower end corresponds to a lateral lower end of a contour of each of four sides of the key cap in a lateral view. A secondary molded article 27 is formed on the primary molded article by using a mold, as a second outside mold 26, of which lateral lower end corresponds to a lateral lower end of a contour of each of four sides of the key cap in a lateral view.

Description

本発明は、キーキャップ及び製造方法に関する。   The present invention relates to a key cap and a manufacturing method.

ＰＣ（Ｐｅｒｓｏｎａｌ Ｃｏｍｐｕｔｅｒ）のキーボードに用いられるキーキャップの成形方法としては、樹脂を内型及び外型を用いるモールド成形方法の他、内型と第一の外型とを組み合わせて有色の樹脂からなる一次成形品を形成し、内型と第二の外型とを組み合わせて一次成型品の表面上に無色の樹脂からなる二次成型品を被着形成する二色モールド成形方法が挙げられる（例えば、特許文献１参照。）。   As a molding method of a key cap used for a PC (Personal Computer) keyboard, in addition to a molding method using an inner mold and an outer mold as a resin, the inner cap and the first outer mold are combined to form a colored resin. There is a two-color molding method in which a primary molded product is formed, and a secondary molded product made of a colorless resin is deposited on the surface of the primary molded product by combining the inner mold and the second outer mold (for example, , See Patent Document 1).

特開平１−１７８４２６号公報JP-A-1-178426

図４（ａ）は、一般の二色モールド成形方法により形成されたキーキャップの平面図であり、図４（ｂ）は、図４（ａ）のIVｂ−IVｂ線断面図であり、図４（ｃ）は、図４（ａ）のIVｃ−IVｃ線断面図である。
このキーキャップ１０は、有色の樹脂からなる一次成型品１の上に透明な樹脂からなる二次成型品２が形成され、二次成型品２の上に文字が印刷されている。 4A is a plan view of a key cap formed by a general two-color molding method, and FIG. 4B is a cross-sectional view taken along line IVb-IVb in FIG. 4A. (C) is the IVc-IVc sectional view taken on the line of Fig.4 (a).
In the key cap 10, a secondary molded product 2 made of a transparent resin is formed on a primary molded product 1 made of a colored resin, and characters are printed on the secondary molded product 2.

しかしながら、二色モールド成形方法により形成されたキーキャップ１０は、一次成型品１の周囲及び上面が透明な二次成型品２で覆われているためユーザーから見て本来の大きさより小さく見え、キーキャップ１０が打ちづらく感じる。   However, the key cap 10 formed by the two-color molding method looks smaller than the original size as viewed from the user because the periphery and the upper surface of the primary molded product 1 are covered with the transparent secondary molded product 2. The cap 10 feels difficult to hit.

そこで、本発明の目的は、本来の大きさに見えるキーキャップ及び製造方法を提供することにある。   Accordingly, an object of the present invention is to provide a keycap and a manufacturing method that look like the original size.

上記課題を解決するため、請求項１記載の発明は、有色の樹脂からなる一次成形品と前記一次成型品の上に無色の樹脂からなる二次成型品を形成したキーキャップであって、前記キーキャップの四辺のうちの少なくとも一辺において、側面視で、前記二次成形品の外形の側面下端が前記一次成型品の外形の側面下端と一致することを特徴とする。   In order to solve the above-mentioned problem, the invention according to claim 1 is a key cap in which a primary molded product made of a colored resin and a secondary molded product made of a colorless resin are formed on the primary molded product, At least one side of the four sides of the keycap is characterized in that, in a side view, the lower end of the side of the outer shape of the secondary molded product coincides with the lower end of the side of the outer shape of the primary molded product.

請求項２記載の発明は、請求項１記載の発明において、前記キーキャップの四辺のうちのゲート口側の辺は、側面視で、前記一次成型品の外形の側面下端と前記二次成型品の外形の側面下端との間に所定の間隔を有することを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, the side on the gate opening side of the four sides of the keycap is a side lower end of the outer shape of the primary molded product and the secondary molded product in a side view. It is characterized by having a predetermined interval between the lower end of the side of the outer shape.

請求項３記載の発明は、請求項１または２記載の発明において、前記一次成型品の一部が除去されて文字もしくは記号が形成されたことを特徴とする。   The invention according to claim 3 is the invention according to claim 1 or 2, wherein a part of the primary molded product is removed to form characters or symbols.

請求項４記載の発明は、内型と第一の外型とを組み合わせて有色の樹脂からなる一次成形品を形成し、前記内型と第二の外型とを組み合わせて前記一次成型品の上に無色の樹脂からなる二次成型品を形成するキーキャップの成形方法であって、前記第一の外型として、側面視で、側面下端が前記キーキャップの四辺の外形の側面下端と一致する金型を用いて前記一次成型品を形成し、前記第二の外型として、側面視で、側面下端が前記キーキャップの四辺の外形の側面下端と一致する金型を用いて前記一次成型品の上に前記二次成型品を形成することを特徴とする。   According to a fourth aspect of the present invention, a primary molded article made of a colored resin is formed by combining the inner mold and the first outer mold, and the inner molded article and the second outer mold are combined to form the primary molded article. A method of molding a key cap that forms a secondary molded product made of colorless resin on the first outer mold, as viewed from the side, with the lower end of the side surface matching the lower end of the side surface of the four sides of the key cap. The primary molded product is formed using a mold to be used, and the primary molding is performed using the mold as the second outer mold in which the lower end of the side surface coincides with the lower end of the side surface of the four sides of the keycap in a side view. The secondary molded product is formed on a product.

請求項５記載の発明は、請求項４記載の発明において、前記第一の外型として、前記キーキャップの四辺のうちのゲート口側の辺が、側面視で、側面下端が前記キーキャップの四辺の外形の側面下端から所定の間隔を有する金型を用いて前記一次成型品を形成することを特徴とする。   According to a fifth aspect of the present invention, in the fourth aspect of the invention, as the first outer mold, the side on the gate opening side of the four sides of the keycap is a side view and the lower end of the side is the keycap. The primary molded product is formed using a mold having a predetermined distance from the lower end of the side of the outer shape of the four sides.

請求項６記載の発明は、請求項４又は５記載の発明において、前記一次成型品及び前記二次成型品の二色成形後の成型品において、前記一次成型品にレーザー光を照射して前記一次成型品を溶融して文字もしくは記号を形成することを特徴とする。   The invention according to claim 6 is the invention according to claim 4 or 5, wherein in the molded product after the two-color molding of the primary molded product and the secondary molded product, the primary molded product is irradiated with laser light, The primary molded product is melted to form characters or symbols.

本発明によれば、本来の大きさに見えるキーキャップ及び製造方法の提供を実現することができる。   According to the present invention, it is possible to provide a keycap that looks like its original size and a manufacturing method.

本発明に係るキーキャップの一実施の形態を示す平面図であり、（ｂ）は、（ａ）のＩｂ−Ｉｂ線断面図であり、（ｃ）は、（ａ）のＩｃ−１ｃ線断面図である。It is a top view which shows one Embodiment of the keycap which concerns on this invention, (b) is Ib-Ib sectional view taken on the line of (a), (c) is Ic-1c sectional view of the (a) line FIG. （ａ）〜（ｈ）は、本発明に係るキーキャップの製造方法の一実施の形態を示す工程図である。(A)-(h) is process drawing which shows one Embodiment of the manufacturing method of the keycap which concerns on this invention. （ａ）〜（ｄ）は、図２（ａ）〜（ｇ）に示した工程により得られたキーキャップに文字や符号を形成する方法の一例を示す工程図である。(A)-(d) is process drawing which shows an example of the method of forming a character and a code | symbol in the keycap obtained by the process shown to Fig.2 (a)-(g). （ａ）は、一般の二色モールド成形方法により形成されたキーキャップの平面図であり、（ｂ）は、（ａ）のIVｂ−IVｂ線断面図であり、（ｃ）は、（ａ）のIVｃ−IVｃ線断面図である。(A) is a plan view of a keycap formed by a general two-color molding method, (b) is a sectional view taken along line IVb-IVb of (a), and (c) is (a). It is IVc-IVc sectional view taken on the line.

本発明の実施の形態について図面を参照して説明する。
図１（ａ）は、本発明に係るキーキャップの一実施の形態を示す平面図であり、図１（ｂ）は、図１（ａ）のＩｂ−Ｉｂ線断面図であり、図１（ｃ）は、図１（ａ）のＩｃ−１ｃ線断面図である。
＜工 程＞
本実施形態のキーキャップ２０は、内型と第一の外型とを組み合わせて有色の樹脂からなる一次成形品２５を形成し、内型と第二の外型とを組み合わせて一次成型品２５の上に無色の樹脂からなる二次成型品２７を形成したものである。
キーキャップ２０は、一次成形品２５の斜面２５ａ〜２５ｄのうち有色の溶融樹脂のゲート口側の斜面２５ｄに隣接する斜面２５ａ、２５ｂが第二の外型の斜面（二次成型品の斜面２７ａ、２７ｂでもある）の下端境界、すなわち外形の側面下端２８ａ、２８ｃと一致し、二次成形品２７の斜面２７ａ〜２７ｄのうちゲート口側の斜面２７ｄと隣接する斜面２７ａ、２７ｂが一次成型品２５の斜面２５ａ、２５ｂの下端境界、すなわち外形の側面下端２８ａ、２８ｃと一致するように形成したものである。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a plan view showing an embodiment of a keycap according to the present invention, and FIG. 1B is a cross-sectional view taken along the line Ib-Ib in FIG. c) is a cross-sectional view taken along line Ic-1c of FIG.
<Process>
The key cap 20 of the present embodiment forms a primary molded product 25 made of a colored resin by combining the inner mold and the first outer mold, and combines the inner mold and the second outer mold to form the primary molded product 25. A secondary molded product 27 made of a colorless resin is formed on the substrate.
The key cap 20 has the slopes 25a and 25b adjacent to the slope 25d on the gate side of the colored molten resin among the slopes 25a to 25d of the primary molded product 25 as the slopes of the second outer mold (the slope 27a of the secondary molded product). , 27b), that is, the slopes 27a, 27b adjacent to the slope 27d on the gate port side among the slopes 27a-27d of the secondary molded product 27 are the primary molded products. 25 is formed so as to coincide with the lower end boundary of the slopes 25a and 25b, that is, the outer side lower ends 28a and 28c.

キーキャップ２０の四辺のうちの少なくとも一辺において、側面視で、二次成形品２５の外形の側面下端が一次成型品２５の外形の側面下端２８ａ、２８ｃと一致する。これにより、ユーザーからキーボードのキーキャップ２０を見たときにキーキャップ２０の二次成型品２７の斜面２７ａ、２７ｂが全部見えるので、一般の二色モールド成形方法により形成されたキーキャップ１０より大きく見える。   On at least one of the four sides of the key cap 20, the side lower end of the outer shape of the secondary molded product 25 coincides with the side lower ends 28 a and 28 c of the outer shape of the primary molded product 25 in a side view. As a result, when the user looks at the keycap 20 of the keyboard, the slopes 27a and 27b of the secondary molded product 27 of the keycap 20 are all visible, so that it is larger than the keycap 10 formed by a general two-color molding method. appear.

＜工 程＞
図２（ａ）〜（ｈ）は、本発明に係るキーキャップの製造方法の一実施の形態を示す工程図である。
内型２１の上に第一の外型２２を重ね合わせ、ゲート口２３に射出成形用のノズル２４を固定する（図２（ａ））。 <Process>
2A to 2H are process diagrams showing an embodiment of a method for manufacturing a keycap according to the present invention.
The first outer mold 22 is overlaid on the inner mold 21, and the injection molding nozzle 24 is fixed to the gate port 23 (FIG. 2A).

ノズル２４から内型２１と外型２２との間の空間に、ゲート口２３を介して有色の溶融樹脂２５ａを注入する（図２（ｂ））。   A colored molten resin 25a is injected from the nozzle 24 into the space between the inner mold 21 and the outer mold 22 through the gate port 23 (FIG. 2B).

溶融樹脂２５ａの注入後、内型２１及び外型２２を冷却（もしくは自然冷却）して硬化することにより一次成型品２５が形成される（図２（ｃ））。   After the injection of the molten resin 25a, the inner mold 21 and the outer mold 22 are cooled (or naturally cooled) and cured to form the primary molded product 25 (FIG. 2C).

第１の外型２２を内型２１から外し、内型２１の上に第二の外型２６を重ね合わせる（図２（ｄ））。   The first outer mold 22 is removed from the inner mold 21, and the second outer mold 26 is overlaid on the inner mold 21 (FIG. 2D).

内型２１の上に外型２６を重ね合わせ、ゲート口２７にノズル２４を固定する。ここで、ゲート口２７は、図ではゲート口２３の上に位置しているが、実際にはゲート２７はゲート２３と同じ高さになっており、説明上ゲート２３の上に記載している（図２（ｅ））。   The outer mold 26 is overlaid on the inner mold 21, and the nozzle 24 is fixed to the gate port 27. Here, although the gate port 27 is located on the gate port 23 in the figure, the gate 27 is actually at the same height as the gate 23 and is described on the gate 23 for explanation. (FIG. 2 (e)).

一次成型品２５と外型２６との間の空間にゲート口２７を介して透明の溶融樹脂２７ａを注入する。   Transparent molten resin 27 a is injected into the space between the primary molded product 25 and the outer mold 26 through the gate port 27.

ここで、第一の外型２２として、キーキャップ２０の四辺のうちのゲート口２３側の辺（またはゲート口側の辺及びゲート口側の辺に対向する辺）が、側面視で、側面下端がキーキャップ２０の四辺の外形の側面下端から所定の間隔（例えば、０．５〜１．０ｍｍ）を有する金型を用いて一次成型品２５を形成することにより、ゲート口２７から注入された溶融樹脂２７ａが隅々まで十分に充填されるという効果を奏する（図２（ｆ））。   Here, as the first outer mold 22, the side on the gate port 23 side (or the side facing the gate port side and the side on the gate port side) of the four sides of the keycap 20 is a side surface in side view. The lower end is injected from the gate port 27 by forming the primary molded product 25 using a mold having a predetermined distance (for example, 0.5 to 1.0 mm) from the lower end of the side of the four-sided outer shape of the keycap 20. The molten resin 27a is sufficiently filled to every corner (FIG. 2 (f)).

溶融樹脂２７ａの注入後、内型２１及び外型２６を冷却（もしくは自然冷却）して硬化することにより一次成型品２５の上に二次成型品２７が形成される（図２（ｇ））。
内型２１から一次成型品２５に二次成型品２７が被着形成された成型品を取り外し、ランナー２９を切除することでキーキャップ２０が得られる（図２（ｈ））。 After the injection of the molten resin 27a, the inner mold 21 and the outer mold 26 are cooled (or naturally cooled) and cured to form a secondary molded product 27 on the primary molded product 25 (FIG. 2 (g)). .
The key cap 20 is obtained by removing the molded product in which the secondary molded product 27 is deposited on the primary molded product 25 from the inner mold 21 and cutting the runner 29 (FIG. 2 (h)).

このようにして形成されたキーキャップ２０は、一次成型品２５及び二次成型品２７の少なくとも斜面２５ａ、２５ｂ、２７ａ、２７ｂの側面下端２８ａ、２８ｃが一致しているので、有色層である一次成型品２５が小さく見えることがなく、キーの打ちづらさが解消する。   The key cap 20 formed in this manner is a primary layer that is a colored layer because at least the side surface lower ends 28a and 28c of the slopes 25a, 25b, 27a, and 27b of the primary molded product 25 and the secondary molded product 27 coincide. The molded product 25 does not look small, and the difficulty of hitting the key is eliminated.

図３（ａ）〜（ｄ）は、図２（ａ）〜（ｇ）に示した工程により得られたキーキャップに文字や符号を形成する方法の一例を示す工程図である。
キーキャップ２０の一次成型品２５側にレーザー光源３０を準備する（図３（ａ））。
レーザー光源３０からキャップ２０の一次成型品２５の文字もしくは符号を形成する箇所にレーザー光３０ａを照射して一次成型品２５を加熱溶融（蒸発）することにより除去する（図３（ｂ））。
レーザー光３０ａの照射後（図３（ｃ））、文字もしくは符号が形成されたキーキャップ２０が得られる（図３（ｄ））。
このようにして形成されたキーキャップ２０は、文字もしくは符号が形成された一次成型品２５が透明な樹脂からなる二次成型品２７で覆われているので、キータッチにより文字や符号が消えることがない。 FIGS. 3A to 3D are process diagrams showing an example of a method of forming characters and symbols on the key cap obtained by the processes shown in FIGS. 2A to 2G.
A laser light source 30 is prepared on the primary molded product 25 side of the keycap 20 (FIG. 3A).
The portion of the cap 20 formed with characters or symbols of the primary molded product 25 of the cap 20 is irradiated with the laser beam 30a and the primary molded product 25 is removed by heating and melting (evaporating) (FIG. 3B).
After the irradiation with the laser beam 30a (FIG. 3C), the keycap 20 on which characters or symbols are formed is obtained (FIG. 3D).
In the key cap 20 formed in this way, since the primary molded product 25 on which characters or codes are formed is covered with the secondary molded product 27 made of a transparent resin, the characters and codes are erased by key touch. There is no.

なお、上述した実施の形態は、本発明の好適な実施の形態の一例を示すものであり、本発明はそれに限定されることなく、その要旨を逸脱しない範囲内において、種々変形実施が可能である。例えば、上述の説明では、一次成形品の斜面のうち有色の溶融樹脂のゲート口側の斜面に隣接する斜面が第二の外型の斜面の下端境界と一致し、二次成形品の斜面のうちゲート口側の斜面と隣接する斜面が一次成型品の斜面の下端境界と一致するように形成した点について説明したが、本発明ではこれに限定されず、有色の溶融樹脂のゲート口側の斜面に対向する斜面が第二の外型の斜面の下端境界と一致し、無色の溶融樹脂のゲート口側の斜面に対向する斜面が一次成型品の斜面の下端境界と一致するように形成してもよい。   The above-described embodiment shows an example of a preferred embodiment of the present invention, and the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention. is there. For example, in the above description, the slope adjacent to the slope on the gate side of the colored molten resin in the slope of the primary molded product coincides with the lower boundary of the slope of the second outer mold, and the slope of the secondary molded product Of these, the slope that is adjacent to the slope on the gate opening side is described so as to coincide with the lower boundary of the slope of the primary molded product, but the present invention is not limited to this, and the gate side of the colored molten resin is not limited to this. The slope facing the slope is aligned with the lower boundary of the slope of the second outer mold, and the slope facing the slope of the colorless molten resin gate is aligned with the lower boundary of the slope of the primary molded product. May be.

２０ キーキャップ
２１ 内型
２２ 第一の外型
２３ ゲート口
２４ ノズル
２５ 一次成型品
２５ａ〜２５ｄ、２７ａ〜２７ｄ 斜面
２５Ｌ 有色の溶融樹脂
２６ 第二の外型
２７ 二次成型品
２７Ｌ 透明の溶融樹脂
２８ａ〜２８ｃ キーキャップの外形の側面下端（斜面の下端境界）
２９ ランナー 20 Keycap 21 Inner mold 22 First outer mold 23 Gate port 24 Nozzle 25 Primary molded product 25a-25d, 27a-27d Slope 25L Colored molten resin 26 Second outer mold 27 Secondary molded product 27L Transparent molten resin 28a-28c Lower side edge of keycap outline (lower boundary of slope)
29 Runner

Claims (6)

有色の樹脂からなる一次成形品と前記一次成型品の上に無色の樹脂からなる二次成型品を形成したキーキャップであって、
前記キーキャップの四辺のうちの少なくとも一辺において、側面視で、前記二次成形品の外形の側面下端が前記一次成型品の外形の側面下端と一致することを特徴とするキートップ。 A key cap in which a primary molded product made of a colored resin and a secondary molded product made of a colorless resin are formed on the primary molded product,
A key top, wherein at least one side of the four sides of the key cap has a lower side end of the outer shape of the secondary molded product coincident with a lower end of the side surface of the outer shape of the primary molded product in a side view. 前記キーキャップの四辺のうちのゲート口側の辺は、側面視で、前記一次成型品の外形の側面下端と前記二次成型品の外形の側面下端との間に所定の間隔を有することを特徴とする請求項１記載のキーキャップ。   Of the four sides of the keycap, the side on the gate opening side has a predetermined interval between the lower end of the side of the outer shape of the primary molded product and the lower end of the side of the outer shape of the secondary molded product in a side view. The keycap according to claim 1. 前記一次成型品の一部が除去されて文字もしくは記号が形成されたことを特徴とする請求項１または２記載のキーキャップ。   The key cap according to claim 1 or 2, wherein a part of the primary molded product is removed to form characters or symbols. 内型と第一の外型とを組み合わせて有色の樹脂からなる一次成形品を形成し、前記内型と第二の外型とを組み合わせて前記一次成型品の上に無色の樹脂からなる二次成型品を形成するキーキャップの製造方法であって、
前記第一の外型として、側面視で、側面下端が前記キーキャップの四辺の外形の側面下端と一致する金型を用いて前記一次成型品を形成し、
前記第二の外型として、側面視で、側面下端が前記キーキャップの四辺の外形の側面下端と一致する金型を用いて前記一次成型品の上に前記二次成型品を形成することを特徴とするキーキャップの製造方法。 The inner mold and the first outer mold are combined to form a primary molded product made of a colored resin, and the inner mold and the second outer mold are combined to form a colorless resin on the primary molded product. A method of manufacturing a keycap for forming a next molded product,
As the first outer mold, the primary molded product is formed using a mold in which the lower end of the side surface coincides with the lower end of the side surface of the four sides of the keycap in a side view,
Forming the secondary molded product on the primary molded product using a mold having a side lower end that coincides with the lower side of the outer shape of the four sides of the keycap as viewed from the side, as the second outer mold. A keycap manufacturing method. 前記第一の外型として、前記キーキャップの四辺のうちのゲート口側の辺が、側面視で、側面下端が前記キーキャップの四辺の外形の側面下端から所定の間隔を有する金型を用いて前記一次成型品を形成することを特徴とする請求項４記載のキーキャップの製造方法。   As the first outer mold, a die having a gate opening side of the four sides of the key cap in a side view and a lower end of the side having a predetermined distance from a lower end of the outer side of the four sides of the key cap is used. The method of manufacturing a keycap according to claim 4, wherein the primary molded product is formed. 前記一次成型品及び前記二次成型品の二色成形後の成型品において、前記一次成型品にレーザー光を照射して前記一次成型品を溶融して文字もしくは記号を形成することを特徴とする請求項４又は５記載のキーキャップの製造方法。   In the molded product after two-color molding of the primary molded product and the secondary molded product, the primary molded product is irradiated with laser light to melt the primary molded product to form characters or symbols. The manufacturing method of the keycap of Claim 4 or 5.
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WO2016076373A1 (en) * 2014-11-11 2016-05-19 サンスター スイス エスエー Production method for interdental cleaning tool
JPWO2016076373A1 (en) * 2014-11-11 2017-08-24 サンスター スイス エスエー Interdental cleaning tool manufacturing method
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CN106393586A (en) * 2016-10-31 2017-02-15 四川长虹模塑科技有限公司 Multi-color product injection mould

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