JP3906421B2 - Manufacturing method of synthetic resin molded products - Google Patents
Manufacturing method of synthetic resin molded products Download PDFInfo
- Publication number
- JP3906421B2 JP3906421B2 JP2002116074A JP2002116074A JP3906421B2 JP 3906421 B2 JP3906421 B2 JP 3906421B2 JP 2002116074 A JP2002116074 A JP 2002116074A JP 2002116074 A JP2002116074 A JP 2002116074A JP 3906421 B2 JP3906421 B2 JP 3906421B2
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- Japan
- Prior art keywords
- synthetic resin
- resin sheet
- key buttons
- key
- resin molded
- 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.)
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- Injection Moulding Of Plastics Or The Like (AREA)
- Input From Keyboards Or The Like (AREA)
- Manufacture Of Switches (AREA)
- Push-Button Switches (AREA)
Description
【0001】
【発明が属する技術分野】
本発明は、電話器の押しキーボタン、パソコンのキーボードの操作キーボタン、電卓の押しキーボタン等を一体化して製作する技術及びこれらのキーボタン類を筐体等の相手部品に挿入する時の挿入性又は組込み性の向上に関するものである。
【0002】
【従来の技術】
電話器やパソコンのキーボード、電卓の押しキーボタン等を筐体又は相手部品に組みつける場合、各キーボタンを1個ずつ所定の位置に組みつけていた。これでは1台完成するのに時間がかかり生産性もよくない。
【0003】
また、キーボタンを可動ならしめるためにヒンジ又はバネが必要になるがゴム又はエラストマー等の弾性あるいは柔軟性を有する樹脂でヒンジ又はバネ部とキーボタンを一体成形していた。
【0004】
しかしこれらは不透明又は半透明であるためキーボタン表面に数字、文字等の意匠を印刷しなければならず、多数回のキーボタン操作によりこの意匠が摩耗し恒久性がなくなる等の欠陥があった。
【0005】
透明性を得るためにヒンジ部は上記ゴム等で、ボタン部は透明合成樹脂で2色成形すればよく、この場合ゴムの表面に印刷しておけば印刷の恒久性は得られるものの高価な設備を要し、工程も倍加するためコスト高となる。
【0006】
【発明が解決しようとする課題】
前記の如く、電話器等の押しキーボタンを1ヶずつでなく、複数個又は必要数全てを1度に筐体又は相手部品に組みつけることができれば、1台完成する時間が大幅に短縮され生産性も著しく向上する。
【0007】
また、キーボタンは透明で硬度を有し、ヒンジ部又はバネ部は弾性又は柔軟性を有するといった相反する機能を要求されるがこれに応えることも必要である。
【0008】
【課題を解決するための手段】
本発明者等は上記課題を解決すべく鋭意検討の結果、本発明に到達したものである。
【0009】
即ち、独立して上下動可能な、複数のキーボタンを一体に配したものでキーボタンの底面に意匠があって、各キーボタンが、打抜き可能な合成樹脂シートで外周枠に連結された合成樹脂成形品において、該合成樹脂シートに予め開穿した複数の穴を使用し、該合成樹脂シートの裏面より表面に向けて溶融合成樹脂を射出成形してなる合成樹脂成形品を製作することにより、前記課題を解決することに成功したものである。合成樹脂シートは打抜き可能であるため、弾性を有し、バネ又はヒンジとして機能する。合成樹脂に透明な物を用いれば合成樹脂シートに印刷しその上に該樹脂キーボタンが来るので印刷の恒久性が得られる。
【0010】
【発明の実施の形態】
以下、本発明による合成樹脂成形品及びその製造法について説明する。
【0011】
独立して上下動可能な複数のキーボタンを一体に配したもので、キーボタンの底面に意匠(絵柄、文字等)があり、各キーボタンが打抜き可能な合成樹脂シートで外周枠に連結された合成樹脂成形品を提供する。
【0012】
独立して上下動可能な複数のキーボタンを一体に配したもので、キーボタンの底面に意匠があり、各キーボタンが外周枠に連結されずに、各キーボタン同士が1ヶ所又はそれ以上の個所で、打抜き可能な合成樹脂シートで連結された合成樹脂成形品を提供する。
【0013】
独立して上下動可能な複数のキーボタンを一体に配したもので、キーボタンの底面に意匠があり、各キーボタンが打抜き可能な合成樹脂シートで外周枠に連結され、且つ一部の又は全てのキーボタン同士が1ヶ所以上で相互に前記打抜き可能な合成樹脂シートで連結された合成樹脂成形品を提供する。
【0014】
独立して上下動可能な複数のキーボタンを一体に配したもので、キーボタンの底面に意匠があり、各キーボタンが打抜き可能な合成樹脂シートで外周枠に連結され、又は外周枠に連結されずに各キーボタン同士が1ヶ所又はそれ以上の個所で打抜き可能な合成樹脂シートで相互に連結され、又は各キーボタンが打抜き可能な合成樹脂シートで外周枠に連結され、且つ一部のキーボタン又は全てのキーボタン同士が1ヶ所又はそれ以上の個所において前記打抜き可能な合成樹脂シートで相互に連結された合成樹脂成形品において、印刷部のインキ膜層の厚みが単層で4μm以上二層以上で8μm以上で、前記打抜き可能な合成樹脂シートの厚みが0.2mm以上1.0mm以下であるバックライティング可能な合成樹脂成形品を提供する。
【0015】
通常各ボタンは絵柄や文字、数字等の絵柄を有するが、前記各実施形態においてキーボタンが意匠を有しない無色透明なもの又は絵柄を有せず単色印刷を施したものであることを特長とする合成樹脂成形品を提供する。
【0016】
独立して上下動可能な複数のキーボタンを一体に配したもので、キーボタンの底面に意匠があって、各キーボタンが打抜き可能な合成樹脂シートで外周枠に連結された合成樹脂成形品において該合成樹脂シートに予め開穿した複数の穴を使用し、該合成樹脂シートの裏面より表面に向けて溶融合成樹脂を射出成形してなる合成樹脂成形の製造法を提供する。
【0017】
ポリカーボネート等の打抜き可能な合成樹脂シートは厚みが0.2mm以上1.0mm以下であることが必要である。0.2mmより薄いと連結部がボタンの重量に負け、全体として1個の物としての取り扱いが困難になり、筐体に組みこむ時に長時間を要することとなり組み込み性の向上、生産性の大幅な向上を期待しえない。又バネとしての機能も低いものとなる。
【0018】
合成樹脂シートの厚みが1mmを超えると外周枠とキーボタンを継ぐ連結部をキーボタンが上下動可能であるようにするために、巾2mm程度に形成するが、その形成が困難となる。
【0019】
即ち、合成樹脂シートの厚みが1mm以上で連結部の巾を例えば2mmになるように打抜くのには大きな困難を伴い、形崩れやバリの発生等で実質的に打抜き不可能となる。
【0020】
また、バネ又はヒンジとしてみた場合、キーボタンを押すのに大きな力を要する。キーボタンをバックライティング可能とするためには単層で使用するインキ膜の厚みが4μm以上であり、二層以上で使用するインキ膜の厚みが8μm以上であることが必要であるが、それぞれ4μm未満、8μm未満となればピンホールが発生しバックライティングが困難となる。
【0021】
(実施例1)
厚み0.5mmのポリカーボネートシートから成る合成樹脂シート5に黒インキで0から9までの数字から成る意匠6と2種の文字を印刷しその上から背景色として白色印刷を行った。数字の大きさは縦8mm巾2.5mmで数字間の間隔は横方向に30mmあり、横方向に3個の数字が並び、縦方向には4つの数字と2種類の文字が各1ヶ並び、文字、数字の縦方向の間隔は30mmであった。上記12ヶの数字、文字を1組とし、これが横75mm縦105mmのポリカシートに印刷されている(図2)が、元のポリカシートの大きさは380mm×530mmで、そこに前記1組の文字、数字が25組印刷されている。このポリカシートを各1組に打抜く(図2)が、この時同時に文字、数字の中心から左上方向に12mm離れた位置に直径4mmの穴を計12ヶ開ける。
【0022】
この各1組に打抜いたポリカシートの印刷面を射出成形金型の固定型に挿入(図2に示すように射出成形金型取付け穴8を使って挿入固定)し、金型を閉じ前記4mmφの射出成形ゲート用穴7を裏ゲートとして使用して前記ポリカシートの印刷面の反対面から印刷面に向かって溶融ポリカーボネート樹脂を射出し冷却後金型を開いて、ポリカシートとポリカーボネート樹脂とが溶着した合成樹脂成形品を得た。射出されたポリカーボネート樹脂部は厚さ1mm、縦横が16mmの土台の上に厚さ4mm直径16mmの円形のキーボタンを形成していた。
この合成樹脂成形品を巾2mmの外周枠1(図1)とポリカーボネート樹脂部とに打抜き金型を用いて打抜くが、キーボタン3(図1)を形成するポリカーボネート樹脂部と外周枠1との間を巾2mmの1ヶ又は2ヶの連結部2(図1)が残るように、又一部のキーボタン3(図1における意匠数字の5及び8のキーボタン)は他のキーボタンと巾2mmの1ヶ又は2ヶの連結部でつながるようにして打抜いた。
【0023】
こうして作製した合成樹脂成形品は数字、文字の各キーボタン3が独立して上下に作動するものであり12ヶのキーボタン3が全体として連結されていて1ヶ又は1組のものとして取扱うことができ、これを筐体に組みこんだところ2秒で組みこむことができた。
【0024】
これに対し、従来品のように12ヶのキーボタン3をバラバラにし各1ヶずつ筐体に組みこんだところ10.5秒を要した。
【0025】
(実施例2)
実施例1においてポリカーボネートシートに印刷する数字、文字及び背景色をスクリーン印刷法で印刷した。
【0026】
また、背景色として数字、文字を抜いたインキ層を黒色で印刷し、これを2回繰返して印刷したインキ膜層の厚みは15μmであった。
【0027】
また、文字,数字を赤インキで印刷し、そのインキ膜層は7μmであった。
【0028】
このようにして印刷したポリカシートを実施例1と同様に処理し、製作した合成樹脂成形品を筐体に組みこみバックライティングしたところ、ピンホールによる光のもれもなく黒の中に鮮やかな赤の数字、文字が浮び上り美麗な外観を呈した。
【0029】
(実施例3)
実施例1において12ヶのキーボタンを1組とし、4組の合成樹脂成形品が得られるように金型に4組のキャビティを設け同時に4組の射出成形を行ない4組の合成樹脂成形品を得た。これらを筐体に組み込んだがその時間は2.2秒であった。
【0030】
【発明の効果】
(1)生産性の向上
▲1▼電話器等に組みこむ1セットのキーボタン類を一度に多数セット作ることができる。
▲2▼1セットのキーボタン類を筐体に組み込むのに短時間で組みこむことができ、生産性を大幅に向上させる。
【0031】
(2)コストの低減
上記(1)にある如く生産性の向上は製造及び組み込みコストの著しい低減をもたらす。又バネ又はヒンジ部とキーボタン部とを一度に生産できるため大幅なコスト低減が可能となる。
【0032】
(3)外観の美麗性
印刷膜厚を所定以上とした絵柄を有するキーボタン類をバックライティングしたものについては、漏光もなく美麗な外観を呈した。
【図面の簡単な説明】
【図1】 本発明による合成樹脂成形品の斜視図である。
【図2】 本発明による印刷を施し穴をあけた合成樹脂シートの表面図である。
【符号の説明】
1…外周枠 5…合成樹脂シート
2…連結部 6…意匠
3…キーボタン 7…射出成形ゲート用穴(12ヶ)
4…意匠 8…射出成形金型取付け穴[0001]
[Technical field to which the invention belongs]
The present invention relates to a technology for integrally manufacturing a push key button of a telephone set, an operation key button of a keyboard of a personal computer, a push key button of a calculator, and the like, and when inserting these key buttons into a mating part such as a casing. It relates to improvement of insertability or embeddability.
[0002]
[Prior art]
When assembling a telephone, a keyboard of a personal computer, a push key button of a calculator, or the like on a casing or a partner part, each key button is assembled in a predetermined position one by one. This takes time to complete one and the productivity is not good.
[0003]
Further, in order to make the key button movable, a hinge or a spring is required, but the hinge or spring part and the key button are integrally formed of a resin having elasticity or flexibility such as rubber or elastomer.
[0004]
However, since these are opaque or translucent, the design of numbers, letters, etc. must be printed on the surface of the key button, and there are defects such as wear of this design and loss of permanentity due to numerous key button operations. .
[0005]
In order to obtain transparency, the hinge part is made of the above rubber or the like, and the button part may be molded in two colors with a transparent synthetic resin. In this case, if printing is performed on the surface of the rubber, permanent printing can be obtained, but expensive equipment And the process is doubled, resulting in high costs.
[0006]
[Problems to be solved by the invention]
As described above, if a plurality or all of the required number of push key buttons such as telephones can be assembled to the housing or the other part at once, the time for completing one unit is greatly reduced. Productivity is also significantly improved.
[0007]
In addition, the key button is transparent and has a hardness, and the hinge part or the spring part is required to have contradictory functions such as elasticity or flexibility, but it is also necessary to meet this.
[0008]
[Means for Solving the Problems]
The inventors of the present invention have reached the present invention as a result of intensive studies to solve the above problems.
[0009]
In other words, a combination of multiple key buttons that can be moved up and down independently, with a design on the bottom of the key buttons, and each key button connected to the outer frame with a synthetic resin sheet that can be punched By using a plurality of holes previously drilled in the synthetic resin sheet in the resin molded article, and producing a synthetic resin molded article formed by injection molding a molten synthetic resin from the back surface to the surface of the synthetic resin sheet And succeeded in solving the above-mentioned problems. Since the synthetic resin sheet can be punched, it has elasticity and functions as a spring or a hinge. If a transparent material is used for the synthetic resin, printing is performed on the synthetic resin sheet, and the resin key button is placed thereon, so that printing durability can be obtained.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the synthetic resin molded product and the manufacturing method thereof according to the present invention will be described.
[0011]
Multiple key buttons that can be moved up and down independently are integrated, and there are designs (pictures, letters, etc.) on the bottom of the key buttons, and each key button is connected to the outer frame with a synthetic resin sheet that can be punched out. Provided synthetic resin molded products.
[0012]
Multiple key buttons that can be moved up and down independently. Designed on the bottom of the key buttons. Each key button is not connected to the outer frame. The synthetic resin molded product connected with a punchable synthetic resin sheet is provided.
[0013]
A plurality of key buttons that can be moved up and down independently are integrated, and there is a design on the bottom of the key buttons, each key button is connected to the outer peripheral frame with a synthetic resin sheet that can be punched, and some or Provided is a synthetic resin molded product in which all the key buttons are connected to each other at one or more places by the punchable synthetic resin sheet.
[0014]
Multiple key buttons that can move up and down independently are integrated, and there is a design on the bottom of the key buttons, each key button is connected to the outer frame with a synthetic resin sheet that can be punched, or connected to the outer frame Each key button is connected to each other with a synthetic resin sheet that can be punched at one or more locations, or each key button is connected to the outer frame with a synthetic resin sheet that can be punched, and In a synthetic resin molded product in which the key buttons or all the key buttons are connected to each other by the punchable synthetic resin sheet at one or more locations, the thickness of the ink film layer of the printing part is 4 μm or more in a single layer Provided is a backlit synthetic resin molded article having a thickness of not less than 2 μm and not less than 8 μm , wherein the punchable synthetic resin sheet has a thickness of not less than 0.2 mm and not more than 1.0 mm.
[0015]
Each button usually has a pattern such as a pattern, letters, numbers, etc., but in each of the above embodiments, the key button is a colorless and transparent one that does not have a design, or a single color print that does not have a pattern. A synthetic resin molded product is provided.
[0016]
Synthetic resin molded product with multiple key buttons that can be moved up and down independently, with a design on the bottom of the key buttons, and a synthetic resin sheet that can be punched into each key button. A synthetic resin molding manufacturing method is provided, in which a plurality of holes previously opened in the synthetic resin sheet are used, and a molten synthetic resin is injection-molded from the back surface to the surface of the synthetic resin sheet.
[0017]
The punched synthetic resin sheet such as polycarbonate needs to have a thickness of 0.2 mm or more and 1.0 mm or less. If it is thinner than 0.2 mm, the connecting part loses the weight of the button, and it becomes difficult to handle it as a whole as a whole, and it takes a long time to assemble it into the case, improving the ease of installation and greatly increasing the productivity. I cannot expect any improvement. Also, the function as a spring is low.
[0018]
When the thickness of the synthetic resin sheet exceeds 1 mm, a connecting portion that joins the outer peripheral frame and the key button is formed to have a width of about 2 mm so that the key button can move up and down. However, the formation becomes difficult.
[0019]
That is, it is very difficult to punch the synthetic resin sheet so that the thickness of the synthetic resin sheet is 1 mm or more and the width of the connecting portion is 2 mm, for example.
[0020]
Further, when viewed as a spring or a hinge, a large force is required to press the key button. To the key buttons and backlighting possible is the thickness of the ink film to be used in a single layer is 4μm or more, the thickness of the ink film used is required to be 8μm or more, respectively 4μm in two or more layers If it is less than 8 μm , a pinhole is generated and backlighting becomes difficult.
[0021]
Example 1
The synthetic resin sheet 5 made of a polycarbonate sheet having a thickness of 0.5 mm was printed with black ink on the
[0022]
The printed surface of the polycarbonate sheet punched into each set is inserted into a fixed mold of an injection mold (inserted and fixed using an injection
This synthetic resin molded product is punched into the outer peripheral frame 1 (FIG. 1) having a width of 2 mm and the polycarbonate resin portion using a punching die. The polycarbonate resin portion and the outer
[0023]
The synthetic resin molded product thus manufactured is one in which the
[0024]
On the other hand, it took 10.5 seconds when twelve
[0025]
(Example 2)
In Example 1, numbers, letters and background colors to be printed on the polycarbonate sheet were printed by the screen printing method.
[0026]
Further, the ink layer from which numbers and characters were removed as the background color was printed in black, and this was repeated twice to print the ink film layer with a thickness of 15 μm .
[0027]
Further, letters and numbers were printed with red ink, and the ink film layer was 7 μm .
[0028]
The printed polycarbonate sheet was processed in the same manner as in Example 1, and the manufactured synthetic resin molded product was assembled in a housing and backlit. Red numbers and letters emerged, giving it a beautiful appearance.
[0029]
(Example 3)
In Example 1, four sets of twelve key buttons are provided, and four sets of cavities are provided in the mold so that four sets of synthetic resin molded products are obtained. Got. These were installed in the case, but the time was 2.2 seconds.
[0030]
【The invention's effect】
(1) Improvement of productivity (1) One set of key buttons incorporated into a telephone or the like can be made at a time.
(2) A set of key buttons can be assembled in a short time into the housing, greatly improving productivity.
[0031]
(2) Cost reduction As described in (1) above, the improvement in productivity leads to a significant reduction in manufacturing and assembly costs. Further, since the spring or hinge part and the key button part can be produced at a time, the cost can be greatly reduced.
[0032]
(3) Appearance of Appearance Printed back of key buttons having a pattern with a film thickness of a predetermined thickness or more exhibited a beautiful appearance without light leakage.
[Brief description of the drawings]
FIG. 1 is a perspective view of a synthetic resin molded product according to the present invention.
FIG. 2 is a surface view of a synthetic resin sheet printed with holes according to the present invention.
[Explanation of symbols]
DESCRIPTION OF
4 ...
Claims (1)
該複数の穴を使用して、前記合成樹脂シートの裏面より表面に向けて溶融合成樹脂を射出成形することにより、複数のキーボタンを合成樹脂シート上に一体に配置し、A plurality of key buttons are integrally arranged on the synthetic resin sheet by injection molding a molten synthetic resin from the back surface to the front surface of the synthetic resin sheet using the plurality of holes,
該合成樹脂シートを打抜き金型で打抜いて、該合成樹脂シートの外周枠と及び該外周枠と前記複数のキーボタンの一部とを継ぐ連結部とを設け、且つ隣接するキーボタン同士が1ヶ所又はそれ以上で継ぐ連結部を設けたことにより、The synthetic resin sheet is punched with a punching die, and an outer peripheral frame of the synthetic resin sheet and a connecting portion for connecting the outer peripheral frame and a part of the plurality of key buttons are provided, and adjacent key buttons are By providing a connecting part that connects at one place or more,
独立して上下動可能な複数のキーボタンを合成樹脂シート上に一体に配置し、該複数のキーボタンの底面に対応する合成樹脂シートの対応箇所には意匠を施した、A plurality of key buttons that can be moved up and down independently are integrally arranged on a synthetic resin sheet, and a design is applied to a corresponding portion of the synthetic resin sheet corresponding to the bottom surface of the plurality of key buttons.
ことを特徴とする合成樹脂成形品の製造法。A method for producing a synthetic resin molded product.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2002116074A JP3906421B2 (en) | 2002-04-18 | 2002-04-18 | Manufacturing method of synthetic resin molded products |
Applications Claiming Priority (1)
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