JP2018047583A - Resin housing - Google Patents

Resin housing Download PDF

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JP2018047583A
JP2018047583A JP2016183581A JP2016183581A JP2018047583A JP 2018047583 A JP2018047583 A JP 2018047583A JP 2016183581 A JP2016183581 A JP 2016183581A JP 2016183581 A JP2016183581 A JP 2016183581A JP 2018047583 A JP2018047583 A JP 2018047583A
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thick
housing
resin
visible
pattern
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拓 飯田
Hiroshi Iida
拓 飯田
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a resin housing which has no risk of lowering appearance quality.SOLUTION: A resin housing is provided with at least a resin front housing (housing body portion) 31 in which a thick portion 31a and a thin portion 31b thinner than the thick portion 31a are integrally formed with each other, where in the thick portion 31a, a pattern portion 50 is formed in a visible portion T facing the visible side. The thick portion 31a has an engagement portion 31d with which a screw S provided so as to pass a through hole portion 32d is engaged, at a position corresponding to the through hole portion 32d provided on a rear side housing (case member) 32.SELECTED DRAWING: Figure 1

Description

本発明は、例えば車両用計器に用いられる樹脂筐体に関するものである。   The present invention relates to a resin casing used for, for example, a vehicle instrument.

従来より、この種の樹脂筐体にあっては、例えば下記特許文献１に記載されているものが知られている。この特許文献１に記載の樹脂筐体は、車両用計器に搭載された計器用筐体からなり、液晶表示パネルの表示領域を囲むように液晶表示パネルの前方側に設けられ、ネジ固定用のボス体として厚肉に構成される厚肉部と当該厚肉部よりも肉厚が小さい薄肉部とが一体的に形成された樹脂製の筐体本体部を有している。   Conventionally, as this type of resin casing, for example, the one described in Patent Document 1 below is known. The resin casing described in Patent Document 1 is an instrument casing mounted on a vehicle instrument, and is provided on the front side of the liquid crystal display panel so as to surround the display area of the liquid crystal display panel. The boss body has a resin-made housing main body portion integrally formed with a thick-walled portion configured to be thick and a thin-walled portion having a smaller thickness than the thick-walled portion.

この場合、薄肉部は、表示領域を囲むように設けられる略枠状の水平壁からなり、厚肉部は、この水平壁からなる薄肉部の背面から背後に向けて垂下形成されたネジ固定用のボス体として構成される。   In this case, the thin-walled portion is formed of a substantially frame-shaped horizontal wall provided so as to surround the display area, and the thick-walled portion is for screw fixing formed to hang downward from the back surface of the thin-walled portion formed of the horizontal wall. It is configured as a boss body.

特開２０１５−１３５４３０号公報Japanese Patent Laying-Open No. 2015-135430

ところで、上述の特許文献１に記載の樹脂筐体にあっては、溶融樹脂を利用した射出成形によって厚肉部と薄肉部とを有する筐体本体部を得る際に、当該厚肉部のように厚みが急激に増す部分があると溶融樹脂が冷却固化する過程で樹脂の収縮が不均一となり、厚肉部の可視側を向く可視部（すなわち車両用計器を視認する視認者側に位置する厚肉部の最表面）にヒケが発生する可能性がある。つまり、厚肉部の最表面が、薄肉部の前面とは同一面上に位置せずには薄肉部の前面よりも若干、凹んでいる状態のことを一般的にヒケと言い、このように樹脂筐体の可視部にヒケが発生すると、外観品質の低下を招くという問題がある。
そこで本発明は、前述の課題に対して対処するため、外観品質の低下を招く虞のない樹脂筐体の提供を目的とするものである。 By the way, in the resin case described in Patent Document 1 described above, when obtaining a case body having a thick part and a thin part by injection molding using a molten resin, If there is a part where the thickness increases rapidly, the resin shrinks in the process of cooling and solidifying the resin, and the visible part facing the visible side of the thick part (that is, the viewer side viewing the vehicle instrument) Sinking may occur on the outermost surface of the thick part. In other words, the state where the outermost surface of the thick portion is not flush with the front surface of the thin portion and is slightly recessed from the front surface of the thin portion is generally called sink, When sink marks occur in the visible part of the resin casing, there is a problem that the appearance quality is deteriorated.
Accordingly, the present invention is directed to providing a resin casing that does not cause a decrease in appearance quality in order to cope with the above-described problems.

本発明は、厚肉部と前記厚肉部よりも肉厚が小さい薄肉部とが一体的に形成された樹脂製の筐体本体部を少なくとも備え、前記厚肉部には、その可視側を向く可視部に模様部が形成されていることを特徴とする。   The present invention includes at least a resin-made housing main body integrally formed with a thick part and a thin part having a smaller thickness than the thick part, and the thick part has a visible side thereof. A pattern portion is formed in the visible portion facing.

また本発明は、前記筐体本体部の前記可視側とは反対側に設けられるケース部材を備え、前記厚肉部は、前記ケース部材に設けられた貫通孔部に対応する位置に当該貫通孔部を通過可能に設けられるネジが螺合する螺合部を有していることを特徴とする。   The present invention further includes a case member provided on the opposite side of the housing main body from the visible side, and the thick-walled portion is located at a position corresponding to the through-hole provided in the case member. It has the screwing part in which the screw provided so that passage of a part can be screwed is carried out.

本発明によれば、所期の目的を達成でき、外観品質の低下を招く虞のない樹脂筐体を提供できる。   According to the present invention, it is possible to provide a resin casing that can achieve an intended purpose and does not cause a decrease in appearance quality.

本発明の実施形態による車両用計器の要部断面図（ハッチングは省略）。The principal part sectional drawing of the meter for vehicles by the embodiment of the present invention (hatching is omitted). 同実施形態による筐体本体部の要部正面図。The principal part front view of the housing | casing main-body part by the embodiment.

以下、図１、図２に基づいて、本発明の実施形態を説明する。   Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

図１において、Ｄは車両用計器を示しており、この車両用計器Ｄは、情報表示体１０と、この情報表示体１０の裏側に配置される回路基板２０と、情報表示体１０と回路基板２０とを収納する樹脂筐体３０と、情報表示体１０の前側に配置される透視パネル４０とを備えている。   In FIG. 1, D indicates a vehicle meter. The vehicle meter D includes an information display body 10, a circuit board 20 disposed on the back side of the information display body 10, the information display body 10, and a circuit board. 20, and a transparent panel 40 disposed on the front side of the information display body 10.

情報表示体１０は、例えばＴＦＴ型の液晶表示パネルを適用することができ、車速情報等の各種車両情報を視覚情報として表示するものである。この場合、情報表示体１０は、図示しないフレキシブル配線板を用いて回路基板２０と電気的に接続されている。車両用計器Ｄを視認する視認者は、透視パネル４０越しに各種車両情報を透視することができる。   For example, a TFT type liquid crystal display panel can be applied to the information display body 10 and various vehicle information such as vehicle speed information is displayed as visual information. In this case, the information display body 10 is electrically connected to the circuit board 20 using a flexible wiring board (not shown). A viewer who visually recognizes the vehicle instrument D can see various vehicle information through the perspective panel 40.

回路基板２０は、例えば所定の配線パターンが施された硬質の配線基板からなり、情報表示体１０の表示制御を行うマイクロコンピュータ等からなる制御部（図示せず）や抵抗、コンデンサ等の各種回路部品が前記配線パターン上に導通接続されている。   The circuit board 20 is made of, for example, a hard wiring board provided with a predetermined wiring pattern, and includes a control unit (not shown) including a microcomputer for controlling display of the information display body 10 and various circuits such as resistors and capacitors. A component is conductively connected on the wiring pattern.

樹脂筐体３０は、その主要部が情報表示体１０の前側（情報表示体１０と透視パネル４０との間）に位置する筐体本体部としての前側筐体３１と、その主要部が回路基板２０の裏側を覆うケース部材としての裏側筐体３２とを備えている。   The resin casing 30 includes a front casing 31 as a casing main body that is positioned on the front side of the information display body 10 (between the information display body 10 and the perspective panel 40), and a circuit board that includes the main section. The back side housing | casing 32 as a case member which covers the back side of 20 is provided.

前側筐体３１は、合成樹脂の射出成形体からなり、この場合、厚肉部３１ａと、当該厚肉部３１ａよりも肉厚が小さい薄肉部３１ｂとが一体的に形成された構成となっている。なお、前側筐体３１の色調は例えば黒色となっている。   The front housing 31 is made of a synthetic resin injection-molded body. In this case, the thick portion 31a and the thin portion 31b having a smaller thickness than the thick portion 31a are integrally formed. Yes. Note that the color tone of the front housing 31 is, for example, black.

薄肉部３１ｂは、情報表示体１０の表示エリアを除いた車両用計器Ｄの内部空間を覆い隠すために設けられた隠蔽部からなり、前記表示エリアに対応する薄肉部３１ｂ箇所には例えば矩形状の貫通孔からなる貫通孔部３１ｃが開口形成されている。   The thin portion 31b includes a concealing portion provided to cover the internal space of the vehicle instrument D excluding the display area of the information display body 10, and the thin portion 31b corresponding to the display area has, for example, a rectangular shape. A through-hole portion 31c made of a through-hole is formed as an opening.

一方で、厚肉部３１ａの板厚Ｗ１は薄肉部３１ｂの板厚Ｗ２よりも厚くなっており、この場合、厚肉部３１ａは、薄肉部３１ｂにおける裏面の所定箇所から回路基板２０側に向けて飛び出す（延出する）ネジ固定用のボス体として構成される。   On the other hand, the plate thickness W1 of the thick portion 31a is thicker than the plate thickness W2 of the thin portion 31b. In this case, the thick portion 31a is directed from the predetermined position on the back surface of the thin portion 31b toward the circuit board 20 side. It is configured as a boss body for screw fixing that protrudes (extends).

また、厚肉部３１ａには、その可視側を向く可視部Ｔに模様部５０が設けられている。ここでの厚肉部３１ａの可視部Ｔとは、透視パネル４０を通じて視認者から視認可能となる厚肉部３１ａの最表面を意味する。模様部５０は、例えば図２に示すように中心点にて互いに交差する４本のラインからなる略米字形状の凸刻印模様として形成される。なお、この模様部５０は、射出成形によって前側筐体３１を得る際に、前記最表面から若干、***した刻印形状となるように型形成される。   Further, the thick portion 31a is provided with a pattern portion 50 in the visible portion T facing the visible side. Here, the visible part T of the thick part 31 a means the outermost surface of the thick part 31 a that is visible from the viewer through the perspective panel 40. For example, as shown in FIG. 2, the pattern portion 50 is formed as a substantially U-shaped convex stamp pattern composed of four lines intersecting each other at the center point. In addition, when obtaining the front side housing | casing 31 by injection molding, this pattern part 50 is shape | molded so that it may become the slightly engraved stamp shape from the said outermost surface.

ここで、詳細図示は省略するが、前側筐体３１を射出成形によって得る際の工程を簡単に説明する。まず、固定金型と可動金型とを用意し、固定金型と可動金型とが結合された際に厚肉部３１ａと薄肉部３１ｂとを含む前側筐体３１の形状に対応した成形空間が形成される。なお、例えば固定金型には、凸刻印模様なる模様部５０を形成すべく、模様部５０と同形状の窪み部（凹部）が設けられる。そして、例えば固定金型に設けられたゲート口から溶融樹脂を成形空間へと注入した後、この溶融樹脂を冷却固化する。   Here, although detailed illustration is abbreviate | omitted, the process at the time of obtaining the front side housing | casing 31 by injection molding is demonstrated easily. First, a fixed mold and a movable mold are prepared, and a molding space corresponding to the shape of the front casing 31 including the thick part 31a and the thin part 31b when the fixed mold and the movable mold are combined. Is formed. For example, the fixed mold is provided with a recessed portion (concave portion) having the same shape as the pattern portion 50 in order to form the pattern portion 50 having a convex stamp pattern. Then, for example, after the molten resin is injected into the molding space from the gate port provided in the fixed mold, the molten resin is cooled and solidified.

次に、固定金型と可動金型との結合を解除すべく可動金型を所定方向に抜き移動させ、これにより固定金型に冷却固化した溶融樹脂が残る。最後に、この冷却固化した溶融樹脂を固定金型に備えられるイジェクターピンにより固定金型から離型させて、不要部分（ランナー部）を取り除くことで黒色の射出成形体である前側筐体３１が完成する。   Next, in order to release the coupling between the fixed mold and the movable mold, the movable mold is extracted and moved in a predetermined direction, so that the molten resin cooled and solidified remains in the fixed mold. Finally, the front casing 31 that is a black injection-molded body is formed by releasing the cooled and solidified molten resin from the fixed mold by an ejector pin provided in the fixed mold and removing an unnecessary portion (runner portion). Complete.

ここで、前側筐体３１が薄肉部３１ｂと厚肉部３１ａとで構成されている場合、厚みが急激に増す部分（つまり厚肉部３１ａのような部分）があると、射出成型時に溶融樹脂が冷却固化する過程で樹脂の収縮が不均一となり、厚肉部３１ａの可視側を向く可視部Ｔ（すなわち車両用計器Ｄを視認する視認者側に位置する厚肉部３１ａの最表面）にヒケが発生する可能性がある。   Here, when the front housing 31 is composed of the thin portion 31b and the thick portion 31a, if there is a portion where the thickness increases rapidly (that is, a portion such as the thick portion 31a), a molten resin is formed during injection molding. In the process of cooling and solidifying, the shrinkage of the resin becomes uneven, and the visible portion T facing the visible side of the thick portion 31a (that is, the outermost surface of the thick portion 31a located on the viewer side viewing the vehicle instrument D) Sinking may occur.

ところが、本実施形態では、厚肉部３１ａの最表面に位置する厚肉部３１ａの可視部Ｔに凸刻印模様からなる模様部５０が形成されていることで、可視部Ｔにあるヒケの一部が模様部５０で打ち消される構成となる。よって、ヒケの存在をごまかすことが可能となるため（ヒケの存在がある程度、目立ちにくくなるため）、視認者が厚肉部３１ａの可視部Ｔを見たときの前側筐体３１の外観品質が低下する虞はなくなる。   However, in the present embodiment, the pattern portion 50 made of a convex stamp pattern is formed on the visible portion T of the thick portion 31a located on the outermost surface of the thick portion 31a, so that one sink mark in the visible portion T can be obtained. The part is canceled by the pattern part 50. Therefore, since it becomes possible to cheat the presence of sink marks (because the presence of sink marks is somewhat inconspicuous), the appearance quality of the front housing 31 when the viewer looks at the visible portion T of the thick portion 31a is improved. There is no risk of decline.

裏側筐体３２は、前側筐体３１と同様に合成樹脂の射出成形体からなり、前側筐体３１の可視側とは反対側（つまり前側筐体３１の裏側）に設けられ、回路基板２０の裏側を覆う底壁部３２ａと、情報表示体１０や回路基板２０の側方を覆う側壁部３２ｂとを有する。   The back housing 32 is made of a synthetic resin injection-molded body like the front housing 31 and is provided on the opposite side of the front housing 31 from the visible side (that is, the back side of the front housing 31). It has the bottom wall part 32a which covers a back side, and the side wall part 32b which covers the side of the information display body 10 or the circuit board 20.

底壁部３２ａには、底壁部３２ａよりも一段高い位置に段差部３２ｃが設けられており、この段差部３２ｃには、厚肉部３１ａの窪み部分に設けられた螺合部３１ｄ対応する位置に固定手段としてのネジＳが貫通する貫通孔部３２ｄが設けられている。   The bottom wall portion 32a is provided with a stepped portion 32c at a position one step higher than the bottom wall portion 32a. The stepped portion 32c corresponds to the screwing portion 31d provided in the recessed portion of the thick portion 31a. A through-hole portion 32d through which a screw S as a fixing means passes is provided at the position.

つまり、このことは、厚肉部３１ａは、裏側筐体３２に設けられた貫通孔部３２ｄに対応する位置に当該貫通孔部３２ｄを通過可能に設けられるネジＳが螺合する螺合部３１ｄを有していることを意味している。そして、固定手段としてのネジＳを裏側筐体３２の裏側から貫通孔部３２ｄに貫通させるとともに螺合部３１ｄに螺合させることで、裏側筐体３２が前側筐体３１に取り付けられる。   In other words, this means that the thick portion 31a is screwed with a screw S provided at a position corresponding to the through-hole portion 32d provided in the back housing 32 so that the screw S provided so as to pass through the through-hole portion 32d is screwed. It means that it has. Then, the back-side housing 32 is attached to the front-side housing 31 by allowing the screw S as the fixing means to pass through the through-hole portion 32d from the back side of the back-side housing 32 and to be screwed into the screwing portion 31d.

透視パネル４０は、透光性の合成樹脂材料によって形成され、例えば前側筐体３１の前側開口を塞ぐようにフック固定等の適宜固定手段を用いて裏側筐体３２に取り付けられる。   The see-through panel 40 is formed of a translucent synthetic resin material, and is attached to the back housing 32 using appropriate fixing means such as hook fixing so as to close the front opening of the front housing 31, for example.

以上のように本実施形態では、厚肉部３１ａと厚肉部３１ａよりも肉厚が小さい薄肉部３１ｂとが一体的に形成された樹脂製の前側筐体（筐体本体部）３１を備え、厚肉部３１ａには、その可視側を向く可視部Ｔに模様部５０が形成されていることにより、厚肉部３１ａの可視部Ｔにあるヒケの一部が模様部５０で打ち消され、ヒケの存在が目立ちにくくなるため、外観品質が低下する虞のない樹脂筐体を提供することができる。   As described above, in this embodiment, the resin-made front housing (housing main body) 31 is integrally formed with the thick portion 31a and the thin portion 31b having a smaller thickness than the thick portion 31a. In the thick part 31a, the pattern part 50 is formed in the visible part T facing the visible side, so that a part of sink marks in the visible part T of the thick part 31a is canceled by the pattern part 50, Since the presence of sink marks is less conspicuous, it is possible to provide a resin casing in which the appearance quality does not deteriorate.

なお、本発明は、上述の実施形態及び図面によって限定されるものではない。本発明の要旨を変更しない範囲で、適宜、実施形態及び図面に変更（構成要素の削除も含む）を加えることが可能である。   In addition, this invention is not limited by the above-mentioned embodiment and drawing. Changes (including deletion of constituent elements) can be added to the embodiments and the drawings as appropriate without departing from the scope of the present invention.

例えば、上述した実施形態では、模様部５０を中心点にて互いに交差する４本のラインからなる略米字形状の凸刻印模様としたが、模様部５０の形状はヒケの存在を目立ちにくくするものであればあらゆる形状を採用することができ、例えば三角形形状や格子状の凸刻印模様により模様部５０を形成してもよい。また、必要に応じて、シボ加工等の光拡散処理（粗面）が施された厚肉部３１ａの最表面（可視部Ｔ）に模様部５０を設けてもよい。   For example, in the above-described embodiment, the pattern portion 50 is formed as a substantially U.S.-shaped convex stamp pattern composed of four lines intersecting each other at the center point. However, the shape of the pattern portion 50 makes the presence of sink marks less noticeable. Any shape can be employed, and for example, the pattern portion 50 may be formed by a triangular or lattice-shaped convex marking pattern. Moreover, you may provide the pattern part 50 in the outermost surface (visible part T) of the thick part 31a to which light diffusion processes (rough surface), such as a texturing process, were given as needed.

１０ 情報表示体
２０ 回路基板
３０ 樹脂筐体
３１ 前側筐体（筐体本体部）
３１ａ 厚肉部
３１ｂ 薄肉部
３１ｃ 開口部
３１ｄ 螺合部
３２ 裏側筐体（ケース部材）
３２ａ 底壁部
３２ｂ 側壁部
３２ｃ 段差部
３２ｄ 孔部
４０ 透視パネル
５０ 模様部
Ｓ ネジ
Ｔ 可視部 DESCRIPTION OF SYMBOLS 10 Information display body 20 Circuit board 30 Resin case 31 Front side case (case main-body part)
31a Thick part 31b Thin part 31c Opening part 31d Screw part 32 Back side case (case member)
32a Bottom wall part 32b Side wall part 32c Step part 32d Hole part 40 Perspective panel 50 Pattern part S Screw T Visible part

Claims (2)

厚肉部と前記厚肉部よりも肉厚が小さい薄肉部とが一体的に形成された樹脂製の筐体本体部を少なくとも備え、
前記厚肉部には、その可視側を向く可視部に模様部が形成されていることを特徴とする樹脂筐体。 At least a housing body made of resin in which a thick part and a thin part having a smaller thickness than the thick part are integrally formed,
The thick-walled portion has a pattern portion formed in a visible portion facing the visible side. 前記筐体本体部の前記可視側とは反対側に設けられるケース部材を備え、
前記厚肉部は、前記ケース部材に設けられた貫通孔部に対応する位置に当該貫通孔部を通過可能に設けられるネジが螺合する螺合部を有していることを特徴とする請求項１記載の樹脂筐体。 A case member provided on the opposite side to the visible side of the housing body,
The thick portion has a screwing portion into which a screw provided so as to be able to pass through the through-hole portion is screwed at a position corresponding to the through-hole portion provided in the case member. Item 1. A resin casing according to Item 1.
JP2016183581A 2016-09-21 2016-09-21 Resin housing Pending JP2018047583A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6369616A (en) * 1986-09-10 1988-03-29 Mazda Motor Corp Manufacture of synthetic resin molded form
JPS63281818A (en) * 1987-05-14 1988-11-18 Matsushita Electric Ind Co Ltd Injection mold assembly
JPH08207075A (en) * 1994-11-28 1996-08-13 Ricoh Co Ltd Injection molded piece
JPH0976247A (en) * 1995-09-13 1997-03-25 Idemitsu Petrochem Co Ltd Mold for manufacturing partially thick molding and manufacture thereof
JP2007144934A (en) * 2005-11-30 2007-06-14 Toyoda Gosei Co Ltd Method and apparatus for manufacturing resin molded product

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6369616A (en) * 1986-09-10 1988-03-29 Mazda Motor Corp Manufacture of synthetic resin molded form
JPS63281818A (en) * 1987-05-14 1988-11-18 Matsushita Electric Ind Co Ltd Injection mold assembly
JPH08207075A (en) * 1994-11-28 1996-08-13 Ricoh Co Ltd Injection molded piece
JPH0976247A (en) * 1995-09-13 1997-03-25 Idemitsu Petrochem Co Ltd Mold for manufacturing partially thick molding and manufacture thereof
JP2007144934A (en) * 2005-11-30 2007-06-14 Toyoda Gosei Co Ltd Method and apparatus for manufacturing resin molded product

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