JP2000182462A - Manufacture of sheet-like key top, molding mold, and molded product - Google Patents
Manufacture of sheet-like key top, molding mold, and molded productInfo
- Publication number
- JP2000182462A JP2000182462A JP10355569A JP35556998A JP2000182462A JP 2000182462 A JP2000182462 A JP 2000182462A JP 10355569 A JP10355569 A JP 10355569A JP 35556998 A JP35556998 A JP 35556998A JP 2000182462 A JP2000182462 A JP 2000182462A
- Authority
- JP
- Japan
- Prior art keywords
- key top
- film
- sheet
- key
- printed
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14688—Coating articles provided with a decoration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/46—Knobs or handles, push-buttons, grips
- B29L2031/466—Keypads, keytops
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/028—Printed information
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2229/00—Manufacturing
- H01H2229/044—Injection moulding
- H01H2229/047—Preformed layer in mould
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Push-Button Switches (AREA)
- Manufacture Of Switches (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電話機、パソコン
キーボード、コントローラ、ＡＶ機器、モーター入力ス
イッチ等の各種キースイッチのキートップ本体とフィル
ムが一体形成されてなる押し釦スイッチのシート状キー
トップの製造方法および成形金型並びに射出成形品に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-like key top of a push button switch in which a film and a key top body of various key switches such as a telephone, a personal computer keyboard, a controller, an AV device, and a motor input switch are integrally formed. The present invention relates to a manufacturing method, a molding die, and an injection molded product.
【０００２】[0002]
【従来の技術】従来、電話機や携帯電話の小型化・薄型
化を図るためにフィルムからなるシートに直接モールド
樹脂製のキートップを成形したシート状キートップが開
発されている。さらにシート状キートップの防水機能を
完全なものとするためにシートに何ら貫通孔を設けず、
該シートを湾曲させて該湾曲部内にモールド樹脂を充填
してキートップを形成するタイプのシート状キートップ
が望まれている。2. Description of the Related Art Heretofore, in order to reduce the size and thickness of telephones and mobile phones, sheet-like key tops have been developed in which a resin-made key top is directly formed on a film sheet. Furthermore, in order to complete the waterproof function of the sheet key top, there is no through hole in the sheet,
There is a demand for a sheet-shaped keytop of a type in which the sheet is bent and a mold resin is filled in the bent portion to form a keytop.
【０００３】従来の製品は、印刷したフィルムからなる
シートを湾曲させるとき、または溶融樹脂を射出しキー
トップ本体を成形するときに、金型や治具におけるシー
トの位置決めをシート全体の外周付近に設けて行なって
いた。In conventional products, when a sheet made of a printed film is curved, or when a molten resin is injected to form a key top main body, the positioning of the sheet in a mold or a jig is performed near the outer periphery of the entire sheet. It was provided and performed.
【０００４】[0004]
【発明が解決しようとする課題】従来のシート状キート
ップの製造方法はフィルムシート全体の外周を押さえて
行なっていたため、シート内の各キートップ部分での伸
び状態を制御することができず、シートに印刷された文
字、記号等表示部を各キートップ天面部の所望の位置に
安定的に形成することが難しく、図１（ｂ）に示したよ
うに従来技術のキートップは表示部が上下や左右に位置
ずれし易い問題があった。In the conventional method of manufacturing a sheet-shaped key top, the outer periphery of the entire film sheet is pressed, so that the state of elongation at each key top portion in the sheet cannot be controlled. It is difficult to stably form a display portion such as a character or a symbol printed on a sheet at a desired position on the top surface of each key top. As shown in FIG. There has been a problem that the position is easily shifted vertically and horizontally.
【０００５】また、図２に示したように熱可塑性樹脂の
射出成形時に、ベースフィルム１がキャビティー２の外
周付近においてパッキンのように作用し、キートップキ
ャビティー内のエアーが逃げ難くなりキートップ本体の
熱可塑性樹脂部にエアーが混入し易い問題があった。In addition, as shown in FIG. 2, during injection molding of a thermoplastic resin, the base film 1 acts like a packing near the outer periphery of the cavity 2 so that air in the key top cavity is hard to escape, and the key top cavity is hardly escaped. There was a problem that air was easily mixed into the thermoplastic resin portion of the top body.
【０００６】[0006]
【課題を解決するための手段】本発明は、表示部を印刷
したフィルムシートを、シート全体の外周部で押さえる
のではなく、各キートップの外周の外側の位置で金型に
形成したリブにより押さえるようにしたものである。こ
れにより図１(ａ)に示したように表示部をキートップ天
面の所望の位置に安定させることができる。また、リブ
の途中に溝を形成しておくことにより、成形時にキート
ップ本体の熱可塑性樹脂部へのエアーの混入を防ぐこと
が可能となった。According to the present invention, a film sheet on which a display portion is printed is not held down by the outer periphery of the entire sheet, but by a rib formed on a die at a position outside the outer periphery of each key top. It is made to hold down. As a result, as shown in FIG. 1A, the display unit can be stabilized at a desired position on the top surface of the key top. Further, by forming the groove in the middle of the rib, it has become possible to prevent air from being mixed into the thermoplastic resin portion of the key top body during molding.
【０００７】[0007]
【発明の実施の態様】本発明は、上記課題を解決するシ
ート状キートップの製造方法および成形金型並びに成形
品に関するものである。すなわち、本発明は、表示部を
印刷したフィルムを、平坦状のままあるいはキートップ
本体の上面側と同形状に加工し、各キートップ用キャビ
ティー口径より外側の位置に少なくとも１個の凸部ある
いは環状リブを形成した金型で前記フィルムを挟持し
て、溶融樹脂を射出することによって、フィルムとキー
トップ本体を一体成形することを特徴とするシート状キ
ートップの製造方法である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a method for manufacturing a sheet-like key top, a molding die and a molded product which solve the above-mentioned problems. That is, in the present invention, a film on which a display portion is printed is processed in a flat shape or in the same shape as the upper surface side of the key top main body, and at least one convex portion is provided at a position outside the diameter of each key top cavity. Alternatively, there is provided a method for manufacturing a sheet-like key top, wherein the film and the key top body are integrally formed by sandwiching the film with a mold having an annular rib and injecting a molten resin.
【０００８】本発明は、各キートップ用キャビティー口
径より外側の位置に少なくとも１個フィルム押さえ用の
凸部あるいは環状リブを形成したことを特徴とするシー
ト状キートップの成形金型である。本発明は、フィルム
の各キートップの周辺に少なくとも１つの凹状の圧縮痕
を有することを特徴とするシート状キートップの成形品
である。The present invention is a molding die for a sheet-like keytop, wherein at least one convex portion or an annular rib for holding down a film is formed at a position outside the diameter of each keytop cavity. The present invention is a molded article of a sheet-like key top, characterized in that the molded article has at least one concave compression mark around each key top of the film.
【０００９】本発明の凸部は、フィルムを押さえる作用
を有すればよいので、１個でも複数個でもよく、また固
定側金型に設けても稼動側金型に設けてもどちら側に設
けてもかまわない。さらに凸部を環状リブとすることに
よってより効果的な押えを実現できる。またリブは一重
でも二重としてもよく、そしてリブに適宜間隔に溝を形
成しておくことで、溶融樹脂の射出成形時にキャビティ
ー内のエアーをこの溝より逃げ易くすることができ、キ
ートップ本体の熱可塑性樹脂部へのエアーの混入を防ぐ
ことを可能とする。The projection of the present invention may have one or a plurality of projections as long as it has a function of holding down the film, and may be provided on either the fixed mold or the working mold. It doesn't matter. Further, by making the convex portion an annular rib, more effective pressing can be realized. Also, the ribs may be single or double, and by forming grooves at appropriate intervals in the ribs, air in the cavity can easily escape from this groove during injection molding of molten resin, key top It is possible to prevent air from being mixed into the thermoplastic resin portion of the main body.
【００１０】以下に本発明の実施例を図面に従ってより
詳細に説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
【実施例１】図３に本発明の金型断面を示す。本発明の
固定側金型６は、溶融樹脂注入口５を有する金型であ
り、キートップ用キャビティーの口径の外側の位置に凸
部７を設けてある。図４に示す金型の上面より明らかな
ように、溶融樹脂注入口５を有する金型６には環状リブ
７が形成されており、さらにその環状リブには溝８を形
成してある。Embodiment 1 FIG. 3 shows a cross section of a mold according to the present invention. The fixed-side mold 6 of the present invention is a mold having a molten resin injection port 5, and has a convex portion 7 at a position outside the diameter of the key top cavity. As is clear from the upper surface of the mold shown in FIG. 4, an annular rib 7 is formed in a mold 6 having a molten resin injection port 5, and a groove 8 is formed in the annular rib.
【００１１】本発明の製造方法を図５以下に示す。The manufacturing method of the present invention is shown in FIG.
【実施例２】図５に示す予め印刷された印刷層１０を有
するフィルム９を、図６に示すように本発明の金型にて
挟持した後に、熱可塑性樹脂１１を射出成形してフィル
ムとキートップ本体を一体形成する。このとき、キート
ップ用キャビティー２の口径より外側の位置に形成した
凸部７が型締め時にフィルムをキートップの周辺で抑
え、キートップ天面の文字、記号等の表示部を所望の位
置に安定させる。溶融樹脂注入口５は全キートップ本体
裏面側に配置し、図９のように型開きと同時にゲートカ
ットを行い、図１０のように本発明のシート状キートッ
プ成形品を形成する。Example 2 A film 9 having a pre-printed print layer 10 shown in FIG. 5 is sandwiched by a mold of the present invention as shown in FIG. 6, and then a thermoplastic resin 11 is injection-molded to form a film. The key top body is integrally formed. At this time, the convex portion 7 formed at a position outside the diameter of the key top cavity 2 suppresses the film around the key top at the time of mold clamping, and the display portion of characters, symbols, etc. on the top surface of the key top is positioned at a desired position. To stabilize. The molten resin injection port 5 is arranged on the back side of the entire key top main body, performs gate opening and gate cutting as shown in FIG. 9, and forms a sheet-like key top molded product of the present invention as shown in FIG.
【００１２】[0012]
【実施例３】図５に示す予め印刷された印刷層１０を有
するフィルム９を、図７に示すようにキートップ本体の
上面側と同形状に湾曲させ、図８に示すように本発明の
金型にて挟持した後に、熱可塑性樹脂１１を射出成形し
てフィルムとキートップ本体を一体形成する。このと
き、キートップ用キャビティー２の口径より外側の位置
に形成した凸部７が型締め時にフィルムをキートップの
周辺で抑え、キートップ天面の文字、記号等の表示部を
所望の位置に安定させる。溶融樹脂注入口５は全キート
ップ本体裏面側に配置し、図９のように型開きと同時に
ゲートカットを行い、図１０のように本発明のシート状
キートップ成形品を形成する。Embodiment 3 A film 9 having a pre-printed print layer 10 shown in FIG. 5 is curved into the same shape as the upper surface side of the key top main body as shown in FIG. After being sandwiched by the mold, the thermoplastic resin 11 is injection molded to integrally form the film and the key top main body. At this time, the convex portion 7 formed at a position outside the diameter of the key top cavity 2 suppresses the film around the key top at the time of mold clamping, and the display portion of characters, symbols, etc. on the top surface of the key top is positioned at a desired position. To stabilize. The molten resin injection port 5 is arranged on the back side of the entire key top main body, performs gate opening and gate cutting as shown in FIG. 9, and forms a sheet-like key top molded product of the present invention as shown in FIG.
【００１３】本発明の成形品を図１０および図１１に示
してある。図１０は本発明の成形品断面図で、図１１は
本発明の成形品の底面図である。圧縮痕１２が熱可塑性
樹脂１１のキートップの周辺に形成される。この圧縮
痕、すなわち凹部はキートップが狭い間隔で連接される
ような製品の場合に生じる押し釦操作時の隣り合った押
し釦の連動を防止する作用を果たす。The molded article of the present invention is shown in FIGS. FIG. 10 is a sectional view of a molded article of the present invention, and FIG. 11 is a bottom view of the molded article of the present invention. A compression mark 12 is formed around the key top of the thermoplastic resin 11. The compression mark, that is, the concave portion serves to prevent the interlocking of the adjacent push buttons at the time of operating the push button which occurs in the case of a product in which the key tops are connected at a small interval.
【００１４】比較のため、前記本発明のように表示部を
印刷したフィルムをキートップ本体の上面側と同形状に
湾曲させたものではなく、フィルムを平面状のままとし
成形金型に挟持させ、熱可塑性樹脂を射出成形した。で
きた成形品の表示部の位置ずれ寸法幅は、本発明の成形
金型を使用したものは±０.１ｍｍ以内となり、従来の
成形金型で行なったものは±０．３ｍｍであった。本発
明の製造方法によるものが、従来の製造法と比べ、表示
部の位置ずれ寸法幅が小さかった。For comparison, the film on which the display portion is printed as in the present invention is not curved to have the same shape as the upper surface of the key top main body, but the film is kept flat and sandwiched by a molding die. And injection molding of a thermoplastic resin. The misalignment width of the display portion of the resulting molded product was within ± 0.1 mm when using the molding die of the present invention, and ± 0.3 mm when performing with the conventional molding die. According to the manufacturing method of the present invention, the positional deviation dimension width of the display unit was smaller than that of the conventional manufacturing method.
【００１５】[0015]
【発明の効果】本発明の成形金型のキートップ用キャビ
ティーの口径より外側の位置に凸部あるいは環状リブを
形成した金型を使用して成形時に各キートップ毎の周辺
で樹脂フィルムを押さえるため、成形した製品は、シー
ト状キートップの中央付近の文字、記号等の表示部の位
置を安定させることが容易となり、１シート内のキート
ップ数が多くなるほどこの効果は大きくなる。また、環
状リブに複数個の溝を設けることで、エアベント効果を
付与でき、キートップ本体のエアーの混入不良を無くす
ことができ、樹脂射出条件幅の拡大が可能となり、歩留
まり向上に大きく貢献できた。さらにこれらの凸部ある
いは環状リブにより形成された圧縮痕により、押し釦の
連動などの誤動作が防止できるようになった。According to the present invention, a resin film is formed around each keytop at the time of molding using a mold having a convex portion or an annular rib formed at a position outside the diameter of the keytop cavity of the molding die of the present invention. Because of the pressing, the molded product can easily stabilize the position of the display portion such as characters and symbols near the center of the sheet-like key top, and the effect increases as the number of key tops in one sheet increases. In addition, by providing a plurality of grooves in the annular rib, an air vent effect can be imparted, air entry defects in the key top body can be eliminated, and the resin injection condition width can be increased, greatly contributing to improvement in yield. Was. Further, erroneous operations such as interlocking of the push buttons can be prevented by the compression marks formed by the convex portions or the annular ribs.
【図１】キートップ天面の表示部Fig. 1 Key top display section
【図２】従来の成形金型断面図FIG. 2 is a sectional view of a conventional molding die.
【図３】本発明の成形金型断面図FIG. 3 is a sectional view of a molding die of the present invention.
【図４】本発明の成形金型上面図FIG. 4 is a top view of a molding die according to the present invention.
【図５】表示部を印刷したフィルムFIG. 5 is a film on which a display unit is printed.
【図６】金型でフィルムを挟持した断面図FIG. 6 is a cross-sectional view in which a film is held by a mold;
【図７】キートップと同形状に形成したフィルムFIG. 7 is a film formed in the same shape as the key top.
【図８】金型でフィルムを挟持した断面図FIG. 8 is a cross-sectional view in which a film is held by a mold.
【図９】型開きの状態を示す断面図FIG. 9 is a sectional view showing a state in which the mold is opened.
【図１０】本発明の成形品の断面図FIG. 10 is a sectional view of a molded article of the present invention.
【図１１】本発明の成形品の底面図FIG. 11 is a bottom view of the molded product of the present invention.
１ 本発明のキートップ ２ 従来技術のキートップ ３ 稼動側金型 ４ 従来の固定側金型 ５ 溶融樹脂注入口 ６ 本発明の固定側金型 ７ 凸状リブ部 ８ 凸状リブ部の間の溝 ９ フィルム １０ 印刷層 １１ 熱可塑性樹脂 １２ 圧縮痕 DESCRIPTION OF SYMBOLS 1 Key top of this invention 2 Key top of prior art 3 Working side mold 4 Conventional fixed side mold 5 Molten resin injection port 6 Fixed side mold of the present invention 7 Convex rib part 8 Between convex rib parts Groove 9 Film 10 Printing layer 11 Thermoplastic resin 12 Compression mark
Claims (8)
プ用キャビティーの口径より外側の位置に少なくとも１
個の凸部を形成してある金型で挟持し、キートップ本体
となる溶融樹脂を射出してフィルムとキートップ本体を
一体成形することを特徴としたシート状キートップの製
造方法。1. A film on which a display section is printed is provided at least at a position outside the aperture of each key top cavity.
A method for manufacturing a sheet-like key top, comprising sandwiching a mold having a plurality of convex portions, injecting a molten resin to be a key top body, and integrally forming a film and a key top body.
本体の上面側と同形状に形成し、この加工したフィルム
を金型で挟持することを特徴とした請求項１に記載のシ
ート状キートップの製造方法。2. The sheet-like key according to claim 1, wherein a film on which the display portion is printed is formed in the same shape as the upper surface side of the key top main body, and the processed film is sandwiched by a mold. Top manufacturing method.
とを特徴とする請求項１あるいは２に記載のシート状キ
ートップの製造方法。3. The method according to claim 1, wherein the projection is at least one annular rib.
あることを特徴とする請求項３に記載のシート状キート
ップの製造方法。4. The method according to claim 3, wherein at least one groove is formed in the annular rib.
体と同形状に形成した表示部を印刷したフィルムが一体
形成されてなるシート状キートップの成形金型におい
て、各キートップ用キャビティーの口径より外側の位置
に少なくとも１個のフィルム抑え用の凸部を形成したこ
とを特徴とするシート状キートップの成形金型。5. A key top molding die in which a film on which a display portion formed in the same shape as the key top main body is printed is integrally formed on the upper surface side of the key top main body. A molding die for a sheet-like key top, wherein at least one convex portion for suppressing a film is formed at a position outside the caliber of the sheet-shaped key top.
とを特徴とする請求項５に記載のシート状キートップの
成形金型。6. The molding die according to claim 5, wherein the projection is at least one annular rib.
あることを特徴とする請求項６に記載のシート状キート
ップの成形金型。7. The molding die for a sheet-like keytop according to claim 6, wherein at least one groove is formed in the annular rib.
体と同形状に表示部を印刷したフィルムが一体形成され
てなるシート状キートップにおいて、キートップの周辺
のフィルム内側に少なくとも１つの圧縮痕を有すること
を特徴とするシート状キートップの成形品。8. A sheet-like key top in which a film having a display portion printed in the same shape as the key top main body is integrally formed on the upper surface side of the key top main body, wherein at least one compression is provided inside the film around the key top. A molded product of a sheet-like key top having a mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10355569A JP2000182462A (en) | 1998-12-15 | 1998-12-15 | Manufacture of sheet-like key top, molding mold, and molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10355569A JP2000182462A (en) | 1998-12-15 | 1998-12-15 | Manufacture of sheet-like key top, molding mold, and molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000182462A true JP2000182462A (en) | 2000-06-30 |
Family
ID=18444662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10355569A Pending JP2000182462A (en) | 1998-12-15 | 1998-12-15 | Manufacture of sheet-like key top, molding mold, and molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000182462A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6573463B2 (en) | 2000-07-17 | 2003-06-03 | Nec Corporation | Structure of electronic instrument having operation keys and manufacturing method thereof |
| CN113161183A (en) * | 2020-01-22 | 2021-07-23 | 东莞市旭优塑胶科技有限公司 | Film type luminous key |
-
1998
- 1998-12-15 JP JP10355569A patent/JP2000182462A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6573463B2 (en) | 2000-07-17 | 2003-06-03 | Nec Corporation | Structure of electronic instrument having operation keys and manufacturing method thereof |
| CN113161183A (en) * | 2020-01-22 | 2021-07-23 | 东莞市旭优塑胶科技有限公司 | Film type luminous key |
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