JP4437132B2 - Boss with screw hole - Google Patents

Boss with screw hole Download PDF

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JP4437132B2
JP4437132B2 JP2006345694A JP2006345694A JP4437132B2 JP 4437132 B2 JP4437132 B2 JP 4437132B2 JP 2006345694 A JP2006345694 A JP 2006345694A JP 2006345694 A JP2006345694 A JP 2006345694A JP 4437132 B2 JP4437132 B2 JP 4437132B2
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boss
outer peripheral
peripheral surface
reinforcing rib
screw
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JP2008157335A (en
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泰史 伊藤
正由紀 上石
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Sharp NEC Display Solutions Ltd
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NEC Display Solutions Ltd
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本発明は、樹脂成形品に一体成形されるボスに関するものであり、特にネジがねじ込まれるネジ穴を備えたボスに関するものである。   The present invention relates to a boss integrally formed with a resin molded product, and particularly to a boss having a screw hole into which a screw is screwed.

樹脂成形品には、ネジがねじ込まれるボスが一体成形されることが多い。例えば、電気製品のカバー、ケース、キャビネットなど（以下まとめて「カバー」という。）は、分割された複数の部材の組み合わせによって構成されていることが多く、それら部材同士は、一方の部材に形成されたボスに他方の部材を貫通させたネジをねじ込むことによって固定されることが多い。より具体的な例を挙げれば、ケースが上ケースと下ケースとに２分割されており、下ケースにはネジ穴を備えた複数のボスが一体成形されている。一方、上ケースには、下ケースと組み合わされたときに、上記ネジ穴と連通する貫通穴が一体成形されている。もちろん、上ケースにボスが、下ケースに貫通穴が形成されている場合もある。いずれにしても、ケースを組み立てる際には、下ケースと上ケースを突き合わせ、一方のケースに形成されている貫通穴に挿入したネジを他方のケースに形成されているボスのネジ穴にねじ込む。もっとも、ネジがセルフタッピングネジである場合には、ボスに、ネジ穴ではなく、単なる穴が形成されている場合もある。   A boss into which a screw is screwed is often integrally formed in a resin molded product. For example, electrical product covers, cases, cabinets, etc. (hereinafter collectively referred to as “covers”) are often composed of a combination of a plurality of divided members, and these members are formed on one member. It is often fixed by screwing a screw that penetrates the other member into the formed boss. As a more specific example, the case is divided into an upper case and a lower case, and a plurality of bosses having screw holes are integrally formed in the lower case. On the other hand, the upper case is integrally molded with a through hole that communicates with the screw hole when combined with the lower case. Of course, a boss may be formed in the upper case and a through hole may be formed in the lower case. In any case, when assembling the case, the lower case and the upper case are brought into contact with each other, and the screw inserted into the through hole formed in one case is screwed into the screw hole of the boss formed in the other case. However, when the screw is a self-tapping screw, a mere hole may be formed in the boss instead of a screw hole.

上記のようにボスにネジをねじ込む際、ボスの剛性不足によって該ボスが捻れたり、ひび割れが生じたりすることがあった。また、捻れたボスが元に戻ろうとすることによって、ネジが緩むこともあった。   When screws are screwed into the boss as described above, the boss may be twisted or cracked due to insufficient rigidity of the boss. In addition, the screw may be loosened by the twisted boss trying to return to its original position.

そこで従来は、ボスの周囲に補強リブを形成して、ボスの捻れやひび割れを防止していた。具体的には、図９に示すように、ボス５０の周囲に、該ボス５０の外周面５１から放射状に伸びる複数（図９では４つ）の補強リブ５２を一体成形していた（特許文献１参照）。また、２以上の補強リブを連結し、各補強リブに加わる力を分散させる技術も提案されていた（特許文献２参照）。
特開２００３−２３００７５号公報 実開昭５８−５７１７０号公報 Therefore, conventionally, reinforcing ribs have been formed around the boss to prevent the boss from being twisted or cracked. Specifically, as shown in FIG. 9, a plurality of (four in FIG. 9) reinforcing ribs 52 that extend radially from the outer peripheral surface 51 of the boss 50 are integrally formed around the boss 50 (Patent Document). 1). In addition, a technique for connecting two or more reinforcing ribs and dispersing the force applied to each reinforcing rib has been proposed (see Patent Document 2).
JP 2003-230075 A Japanese Utility Model Publication No. 58-57170

しかし、従来の補強リブは、ボスの中心から伸びる放射線上に形成され、各補強リブは、いずれもボス外周面（ボス外周面の接線方向）と直交していた。このため、ボスの高さが比較的低い場合にはそれなりの補強機能を果たすものの、ボスの高さが高くなると、ボスの捻れやひび割れを十分に防止することができなかった。   However, conventional reinforcing ribs are formed on radiation extending from the center of the boss, and each reinforcing rib is orthogonal to the boss outer peripheral surface (tangential direction of the boss outer peripheral surface). For this reason, when the height of the boss is relatively low, a proper reinforcing function is achieved, but when the height of the boss is increased, the boss is not sufficiently prevented from being twisted or cracked.

従来の補強リブが十分な補強機能を果たし得ない理由について図１０を参照しながら具体的に説明する。図１０は、電気製品の下ケース６０の内壁面６１に立ち上げられたボス５０に、上ケース７０の貫通穴７１を貫通させたネジ７２を時計回りにねじ込む様子を示している。図１１に示されているように、ボス５０にネジ７２をねじ込む際には、ボス外周面５１の接線方向の力（Ｆ1）が発生する。このとき、ボス外周面５１の接線方向に対して直交している補強リブ５２に作用する力の多くは、リブ断面の短辺方向に作用する。すなわち、上記力（Ｆ1）に起因して補強リブ５２に作用する力の方向は、該補強リブ５２の断面２次モーメントの小さな方向と一致するので、補強リブ５２が撓みやすくなる。この結果、図１２に示すように、補強リブ５２が十分な補強機能を果たし得ず、ボス５０に捻れが発生する。そして、ボス５０の高さが高くなるに連れて補強リブ５２の高さが高くなると、すなわち、下ケース６０の内壁面６１に固定された補強リブ５２の底辺と、これに対向する上辺との間の距離が長くなるほど、補強リブ５２は撓みやすくなる。 The reason why the conventional reinforcing rib cannot fulfill a sufficient reinforcing function will be specifically described with reference to FIG. FIG. 10 shows a state in which a screw 72 passing through the through hole 71 of the upper case 70 is screwed clockwise into the boss 50 raised on the inner wall surface 61 of the lower case 60 of the electrical product. As shown in FIG. 11, when the screw 72 is screwed into the boss 50, a tangential force (F 1 ) of the boss outer peripheral surface 51 is generated. At this time, much of the force acting on the reinforcing rib 52 that is orthogonal to the tangential direction of the boss outer peripheral surface 51 acts in the short side direction of the rib cross section. That is, the direction of the force acting on the reinforcing rib 52 due to the force (F 1 ) coincides with the direction in which the cross-section secondary moment of the reinforcing rib 52 is small, so that the reinforcing rib 52 is easily bent. As a result, as shown in FIG. 12, the reinforcing rib 52 cannot fulfill a sufficient reinforcing function, and the boss 50 is twisted. As the height of the boss 50 increases, the height of the reinforcing rib 52 increases, that is, the bottom side of the reinforcing rib 52 fixed to the inner wall surface 61 of the lower case 60 and the upper side opposite to the bottom side. The longer the distance between them, the more easily the reinforcing rib 52 bends.

本発明の目的は、ネジ穴にネジをねじ込む際に発生する力に対して十分な剛性を備えたボスを実現することである。   An object of the present invention is to realize a boss having sufficient rigidity against a force generated when a screw is screwed into a screw hole.

上記目的を達成する本発明のボスの一つは、樹脂成形品に一体成形された断面形状円形のボスであって、ネジ穴と、複数の補強リブとを有し、前記補強リブがボス外周面に連接され、かつ、その連接点における前記ボス外周面の接線方向に延在している。   One of the bosses of the present invention that achieves the above object is a circular boss that is integrally formed with a resin molded product, and has a screw hole and a plurality of reinforcing ribs, and the reinforcing ribs have an outer periphery of the boss. It is connected to the surface, and extends in the tangential direction of the outer peripheral surface of the boss at the connection contact.

本発明のボスの他の一つは、樹脂成形品に一体成形された断面形状多角形のボスであって、ネジ穴と、複数の補強リブとを有し、前記補強リブがボス外周面に連接され、かつ、前記ボス外周面の隣接する２つの面の一方と平行に延在している。この場合、前記補強リブの外面のうちで面積最大の面が前記ボス外周面の隣接する２つの面の一方と平行であることが望ましい。または、前記補強リブの外面のうちで面積最大の面に対向する他の面と、前記ボス外周面の隣接する２つの面の他方とがなす角度が９０°未満であることが望ましい。   Another one of the bosses of the present invention is a polygonal boss that is integrally formed with a resin molded product, and has a screw hole and a plurality of reinforcing ribs, and the reinforcing ribs are formed on the outer peripheral surface of the boss. It is connected and extends in parallel with one of two adjacent surfaces of the outer peripheral surface of the boss. In this case, it is desirable that the surface having the largest area among the outer surfaces of the reinforcing rib is parallel to one of the two adjacent surfaces of the outer peripheral surface of the boss. Alternatively, it is preferable that an angle formed between the other surface of the outer surface of the reinforcing rib facing the surface having the largest area and the other of the two adjacent surfaces of the boss outer peripheral surface is less than 90 °.

本発明のボスでは、ネジ穴にネジがねじ込まれる際に補強リブに作用する力の多くが該補強リブの面内方向に働く。従って、補強リブが撓み難く、補強リブを含むボス全体の剛性が向上する。   In the boss of the present invention, most of the force acting on the reinforcing rib when the screw is screwed into the screw hole works in the in-plane direction of the reinforcing rib. Therefore, the reinforcing rib is difficult to bend and the rigidity of the entire boss including the reinforcing rib is improved.

（実施形態１）
以下、本発明のボスの実施形態の一例を樹脂成形品がプロジェクタの筐体を構成するケースである場合を例にとって図面を参照しつつ説明する。図面には本発明の特徴を説明する上で必要な部分のみが図示されているが、上記ケースは、下ケースと上ケースとに２分割されており、上下のケースを突き合わせることによって、必要機器を収容するための空間を備えた筐体が形成される。そして、本発明のボスは、下ケースと一体成形されており、該下ケースに突き合わされた上ケースの貫通穴を貫通したネジがねじ込まれる。 (Embodiment 1)
Hereinafter, an example of an embodiment of a boss according to the present invention will be described with reference to the drawings, taking as an example a case where a resin molded product is a case constituting a housing of a projector. Although only the parts necessary for explaining the features of the present invention are shown in the drawings, the case is divided into a lower case and an upper case, which are necessary by matching the upper and lower cases. A housing having a space for housing the device is formed. And the boss | hub of this invention is integrally molded with the lower case, The screw which penetrated the through hole of the upper case faced by this lower case is screwed.

図１は、上述の下ケース１及び上ケース２の一部を示す斜視図である。また、図２は、図１の下ケース１の平面図である。これら図面に示されているように、下ケース１の内壁面３のうち、図示されている領域には、２つのボス４が立ち上げられている。一方、上ケース２の内壁面５のうち、図示されている領域には、２つの貫通穴６が形成されている。ここで、下ケース１及び上ケース２の内壁面３、５とは、両ケース１、２を突き合わせた際に、互いに対向する面を意味する。   FIG. 1 is a perspective view showing a part of the lower case 1 and the upper case 2 described above. FIG. 2 is a plan view of the lower case 1 of FIG. As shown in these drawings, two bosses 4 are raised in the illustrated region of the inner wall surface 3 of the lower case 1. On the other hand, two through holes 6 are formed in the illustrated region of the inner wall surface 5 of the upper case 2. Here, the inner wall surfaces 3 and 5 of the lower case 1 and the upper case 2 mean surfaces facing each other when the cases 1 and 2 are brought into contact with each other.

上下のケース１、２を固定する際には、上ケース２の貫通穴６を貫通させたネジ７を下ケース１に設けられたボス４にねじ込む。もちろん、下ケース１の不図示の領域にもボスが立ち上げられており、上ケース２の不図示の領域には、それらボスに対応する貫通穴が形成されている。そして、各貫通穴を貫通させたネジを対応するボスにねじ込む。   When the upper and lower cases 1 and 2 are fixed, a screw 7 penetrating the through hole 6 of the upper case 2 is screwed into a boss 4 provided in the lower case 1. Of course, bosses are also raised in a region (not shown) of the lower case 1, and through holes corresponding to the bosses are formed in a region (not shown) of the upper case 2. And the screw which penetrated each through-hole is screwed in a corresponding boss.

各ボス４は、雌ネジが切られたネジ穴１０が同心状に設けられた円筒形状を有する。換言すれば、ネジ穴１０の軸線と直交する方向におけるボス４の断面形状は円形である。尚、ネジ穴１０にねじ込まれるネジ７がタッピングネジである場合には、ネジ穴１０の内周面に雌ネジが形成されていなくてもよい。   Each boss 4 has a cylindrical shape in which screw holes 10 in which female threads are cut are provided concentrically. In other words, the cross-sectional shape of the boss 4 in the direction orthogonal to the axis of the screw hole 10 is circular. In addition, when the screw 7 screwed into the screw hole 10 is a tapping screw, the female screw may not be formed on the inner peripheral surface of the screw hole 10.

それぞれのボス４の周囲には９０°間隔で４つの補強リブ１１が一体成形されている。具体的には、各補強リブ１１は略長方形の板状体であって、対向する一方の長辺１１ａがボス外周面１２に連接され、対向する一方の短辺（底辺１１ｂ）が下ケース１の内壁面３に連接されている。また、各補強リブ１１は、ボス外周面１２に連接された長辺１１ａを起点とし、ボス外周面１２の接線方向と一致または略一致する方向に延在している。   Four reinforcing ribs 11 are integrally formed around each boss 4 at intervals of 90 °. Specifically, each reinforcing rib 11 is a substantially rectangular plate-like body, one opposing long side 11 a is connected to the boss outer peripheral surface 12, and one opposing short side (bottom side 11 b) is the lower case 1. It is connected to the inner wall surface 3. Each reinforcing rib 11 starts from the long side 11 a connected to the boss outer peripheral surface 12 and extends in a direction that coincides with or substantially coincides with the tangential direction of the boss outer peripheral surface 12.

図３に示すように、ボス４に一体成形された各補強リブ１１がボス外周面１２の接線方向と同一または略同一方向に延在している場合、ボス４のネジ穴１０にネジ７をねじ込む際に、ボス外周面１２に生じる力（Ｆ1）に起因して補強リブ１１に作用する力の多くは、リブ断面の長辺方向に作用する。換言すれば、補強リブ１１に作用する力の方向は、該補強リブ１１の断面２次モーメントの大きな方向と一致または略一致する。よって、ボス４のネジ穴１０にネジ７をねじ込む際に補強リブ１１が撓み難くなり、補強リブ１１を含むボス４全体の剛性が高まる。尚、ここでは、ボス４に対して時計回りでネジがねじ込まれることを前提としている。 As shown in FIG. 3, when each reinforcing rib 11 integrally formed on the boss 4 extends in the same or substantially the same direction as the tangential direction of the boss outer peripheral surface 12, the screw 7 is inserted into the screw hole 10 of the boss 4. Most of the force acting on the reinforcing rib 11 due to the force (F 1 ) generated on the outer peripheral surface 12 of the boss during screwing acts in the long side direction of the rib cross section. In other words, the direction of the force acting on the reinforcing rib 11 coincides with or substantially coincides with the direction in which the cross-section secondary moment of the reinforcing rib 11 is large. Therefore, when the screw 7 is screwed into the screw hole 10 of the boss 4, the reinforcing rib 11 becomes difficult to bend, and the rigidity of the entire boss 4 including the reinforcing rib 11 is increased. Here, it is assumed that a screw is screwed into the boss 4 in a clockwise direction.

以上のように、本発明のボスは、ボス外周面に対して直交する方向に補強リブが延在している従来のボスに比べて、ネジ穴にネジがねじ込まれる際に発生する力に対して高い剛性を有する。よって、図４に示すように、上ケース２の貫通穴６（図１）を貫通させたネジ７をボス４のネジ穴１０（図１）に所定位置までねじ込んでも、ボス４及び補強リブ１１に捻れやひび割れが発生することがない。さらに、ネジ７のねじ込み時にボス４の捻れが抑制されているので、捻れたボス４が元に戻ることによってネジ７が事後的に緩むこともない。   As described above, the boss of the present invention is more resistant to the force generated when the screw is screwed into the screw hole than the conventional boss in which the reinforcing rib extends in a direction perpendicular to the outer peripheral surface of the boss. And has high rigidity. Therefore, as shown in FIG. 4, even if the screw 7 penetrating the through hole 6 (FIG. 1) of the upper case 2 is screwed into the screw hole 10 (FIG. 1) of the boss 4 to a predetermined position, the boss 4 and the reinforcing rib 11 No twisting or cracking occurs. Further, since the twist of the boss 4 is suppressed when the screw 7 is screwed in, the screw 7 does not loosen afterwards when the twisted boss 4 returns.

図５に本実施形態のボス４の変形例を示す。図５に示されているボス４には、該ボス４のネジ穴１０にネジ７が時計回りでねじ込まれる際にボス外周面１２に生じる力（Ｆ1）の向きと正反対の方向または略正反対の方向に延在する補強リブ１１が一体成形されている。もっとも、各補強リブ１１がボス外周面１２の接線方向と一致または略一致する方向に延在している点では図１などに示すボス４と共通する。 FIG. 5 shows a modification of the boss 4 of the present embodiment. The boss 4 shown in FIG. 5 has a direction opposite or substantially opposite to the direction of the force (F 1 ) generated on the boss outer peripheral surface 12 when the screw 7 is screwed clockwise into the screw hole 10 of the boss 4. Reinforcing ribs 11 extending in the direction are integrally formed. However, it is common to the boss 4 shown in FIG. 1 and the like in that each reinforcing rib 11 extends in a direction that coincides with or substantially coincides with the tangential direction of the boss outer peripheral surface 12.

従って、図５に示す構成でも、上記力（Ｆ1）に起因して補強リブ１１に作用する力の多くは、リブ断面の長辺方向に作用する。よって、ボス４のネジ穴１０にネジ７をねじ込む際に補強リブ１１が撓み難くなり、補強リブ１１を含むボス４全体の剛性が高くなる（図６参照）。
（実施形態２）
以下、本発明のボスの実施形態の他例について図面を参照しながら説明する。もっとも、本実施形態のボスの基本構成は実施形態１のボスと共通である。異なるのは、ボスの断面形状が円形ではなく、多角形である点である。但し、ボスにネジをねじ込む際に生じる力に起因して補強リブに作用する力の多くが、該補強リブの面内方向に作用する、という本質において実施形態１のボスと相違するものではない。 Accordingly, even in the configuration shown in FIG. 5, most of the force acting on the reinforcing rib 11 due to the force (F 1 ) acts in the long side direction of the rib cross section. Therefore, when the screw 7 is screwed into the screw hole 10 of the boss 4, the reinforcing rib 11 is difficult to bend, and the rigidity of the entire boss 4 including the reinforcing rib 11 is increased (see FIG. 6).
(Embodiment 2)
Hereinafter, another example of the embodiment of the boss of the present invention will be described with reference to the drawings. However, the basic configuration of the boss of this embodiment is the same as that of the boss of the first embodiment. The difference is that the cross-sectional shape of the boss is not a circle but a polygon. However, it is not different from the boss of the first embodiment in the essence that most of the force acting on the reinforcing rib due to the force generated when the screw is screwed into the boss acts in the in-plane direction of the reinforcing rib. .

図７(ａ)(ｂ)に示すボス４の外周面１２は、直交する４つの面２１によって構成されており、ボス４の断面形状は四角形（正方形）である。そして、隣接する２つの面２１に共通な一辺から外側に向けて補強リブ１１が延在しており、かつ、隣接する２つの面２１の一方と平行に延在している。異なる観点から述べると、補強リブ１１の外面のうち、面積最大の面２２が、ボス外周面１２の隣接する２つの面２１の一方と同一平面内に存在している。   The outer peripheral surface 12 of the boss 4 shown in FIGS. 7A and 7B is composed of four orthogonal surfaces 21, and the cross-sectional shape of the boss 4 is a quadrangle (square). The reinforcing rib 11 extends outward from one side common to the two adjacent surfaces 21, and extends in parallel with one of the two adjacent surfaces 21. If it says from a different viewpoint, the surface 22 with the largest area among the outer surfaces of the reinforcing rib 11 exists in the same plane as one of the two adjacent surfaces 21 of the boss outer peripheral surface 12.

図８に示すボス４の外周面１２は、一定角度で交わる６つの面３１によって構成されており、ボス４の断面形状は六角形である。ここでも、ボス外周面１２の隣接する２つの面３１に共通な一辺から外側に向けて補強リブ１１が延在しており、かつ、隣接する２つの面３１の一方と平行に延在している。異なる観点から述べると、補強リブ１１の外面のうち、面積最大の面３２が、ボス外周面１２の隣接する２つの面３１の一方と同一平面内に存在している。さらに、補強リブ１１の面積最大の面３２と対向する他の面３３と、ボス外周面１２の隣接する２つの面３１の他方とがなす角度（θ）は９０°未満である。   The outer peripheral surface 12 of the boss 4 shown in FIG. 8 is composed of six surfaces 31 that intersect at a constant angle, and the cross-sectional shape of the boss 4 is a hexagon. Also here, the reinforcing rib 11 extends outward from one side common to the two adjacent surfaces 31 of the boss outer peripheral surface 12, and extends in parallel with one of the two adjacent surfaces 31. Yes. If it says from a different viewpoint, the surface 32 with the largest area among the outer surfaces of the reinforcing rib 11 exists in the same plane as one of the two adjacent surfaces 31 of the boss outer peripheral surface 12. Furthermore, the angle (θ) formed by the other surface 33 facing the surface 32 having the largest area of the reinforcing rib 11 and the other of the two adjacent surfaces 31 of the boss outer peripheral surface 12 is less than 90 °.

以上の構成によって、ボス４のネジ穴１０に不図示のネジをねじ込む際に、ボス外周面１２において生じる力（Ｆ1）に起因して補強リブ１１に作用する力の多くは、リブ断面の長辺方向に作用する。換言すれば、補強リブ１１に作用する力の方向は、補強リブ１１の断面２次モーメントの大きな方向と一致または略一致する。 With the above configuration, when a screw (not shown) is screwed into the screw hole 10 of the boss 4, most of the force that acts on the reinforcing rib 11 due to the force (F 1 ) generated on the boss outer peripheral surface 12 Acts in the long side direction. In other words, the direction of the force acting on the reinforcing rib 11 coincides with or substantially coincides with the direction in which the cross-section secondary moment of the reinforcing rib 11 is large.

尚、図７や図８に示す補強リブ１１と、ボス外周面１２の隣接する一方の面２１、３１とが厳密に同一平面内に存在していなくとも、すなわち、図示されている補強リブ１１がその肉厚方向に多少傾いていても、上記と同様の作用効果が得られることは当業者にとって自明である。また、ボスの断面形状は四角形や六角形に限定されるものではなく、その他の多角形も含まれる。また、十分な剛性が得られる限りにおいて、補強リブは、ボス外周面の全ての角に設けられている必要はない。   It should be noted that the reinforcing rib 11 shown in FIGS. 7 and 8 and the adjacent one surfaces 21 and 31 of the boss outer peripheral surface 12 do not exist in the exact same plane, that is, the illustrated reinforcing rib 11 is shown. It is obvious to those skilled in the art that the same effect as described above can be obtained even if the film is slightly inclined in the thickness direction. Further, the cross-sectional shape of the boss is not limited to a square or a hexagon, and includes other polygons. Moreover, as long as sufficient rigidity is obtained, the reinforcing ribs do not have to be provided at all corners of the outer peripheral surface of the boss.

要するに、本発明は、ボスのネジ穴にネジがねじ込まれる際に補強リブに作用する力の多くが該補強リブの面内方向に作用するように該補強リブが配置されていることを特徴とする。また、本発明は、プロジェクタの筐体を構成するケースに限定されず、他の電気製品のカバー、ケース、キャビネットを含む全ての樹脂成形品に適応可能である。   In short, the present invention is characterized in that the reinforcing rib is arranged so that most of the force acting on the reinforcing rib when the screw is screwed into the screw hole of the boss acts in the in-plane direction of the reinforcing rib. To do. Further, the present invention is not limited to the case constituting the casing of the projector, and can be applied to all resin molded products including covers, cases, and cabinets of other electric products.

本発明のボスの実施形態の一例を示す一部省略の斜視図である。It is a partially omitted perspective view showing an example of an embodiment of a boss of the present invention. 図１に示す下ケースの平面図である。It is a top view of the lower case shown in FIG. 図１に示すボス及び補強リブに作用する力を模式的に示す平面図である。It is a top view which shows typically the force which acts on the boss | hub and reinforcement rib shown in FIG. 図１に示すボスにネジを所定位置までねじ込んだ状態を示す一部省略の斜視図である。FIG. 2 is a partially omitted perspective view showing a state where a screw is screwed into a boss shown in FIG. 1 to a predetermined position. 本発明のボスの実施形態の他例を示す一部省略の斜視図である。It is a partially abbreviated perspective view which shows the other example of embodiment of the boss | hub of this invention. 図５に示すボス及び補強リブに作用する力を模式的に示す平面図である。It is a top view which shows typically the force which acts on the boss | hub and reinforcement rib shown in FIG. 本発明のボスの実施形態の他例を示す図であって、（ａ）は拡大斜視図、（ｂ）は平面図である。It is a figure which shows the other example of embodiment of the boss | hub of this invention, Comprising: (a) is an expansion perspective view, (b) is a top view. 本発明のボスの実施形態の他例を示す平面図である。It is a top view which shows the other example of embodiment of the boss | hub of this invention. 従来のボスを示す一部省略の斜視図である。It is a perspective view of the conventional boss partially omitted. 図９に示すボスの斜視図である。FIG. 10 is a perspective view of the boss shown in FIG. 9. 図１０に示す補強リブに作用する力を模式的に示す平面図である。It is a top view which shows typically the force which acts on the reinforcement rib shown in FIG. 図１０に示すボス及び補強リブが捻れた状態を示す斜視図である。It is a perspective view which shows the state which the boss | hub and reinforcement rib shown in FIG. 10 twisted.

符号の説明Explanation of symbols

１ 下ケース
２ 上ケース
３、５ 内壁面
４ ボス
６ 貫通穴
７ ネジ
１０ ネジ穴
１１ 補強リブ
１２ ボス外周面
２１、２２、３１、３２、３３ 面 DESCRIPTION OF SYMBOLS 1 Lower case 2 Upper case 3, 5 Inner wall surface 4 Boss 6 Through hole 7 Screw 10 Screw hole 11 Reinforcement rib 12 Boss outer peripheral surface 21, 22, 31, 32, 33 surface

Claims (4)

樹脂成形品に一体成形された断面形状円形のボスであって、ネジ穴と、複数の補強リブとを有し、前記補強リブは、ボス外周面に連接され、かつ、その連接点における前記ボス外周面の接線方向に延在していることを特徴とするボス。   A boss having a circular cross section formed integrally with a resin molded product, having a screw hole and a plurality of reinforcing ribs, the reinforcing ribs being connected to an outer peripheral surface of the boss, and the bosses at the connecting contacts A boss characterized by extending in a tangential direction of the outer peripheral surface. 樹脂成形品に一体成形された断面形状多角形のボスであって、ネジ穴と、複数の補強リブとを有し、前記補強リブは、ボス外周面に連接され、かつ、前記ボス外周面の隣接する２つの面の一方と平行に延在していることを特徴とするボス。   A polygonal boss having a cross-sectional shape that is integrally formed with a resin molded product, and has a screw hole and a plurality of reinforcing ribs, and the reinforcing ribs are connected to an outer peripheral surface of the boss and are formed on the outer peripheral surface of the boss. A boss characterized by extending in parallel with one of two adjacent surfaces. 前記補強リブの外面のうちで面積最大の面が前記ボス外周面の隣接する２つの面の一方と平行であることを特徴とする請求項２記載のボス。   The boss according to claim 2, wherein a surface having the largest area among the outer surfaces of the reinforcing ribs is parallel to one of two adjacent surfaces of the outer peripheral surface of the boss. 前記補強リブの外面のうちで面積最大の面が前記ボス外周面の隣接する２つの面の一方と平行であり、
前記補強リブの外面のうちで面積最大の面に対向する他の面と、前記ボス外周面の隣接する２つの面の他方とがなす角度が９０°未満であることを特徴とする請求項２記載のボス。 Of the outer surfaces of the reinforcing ribs, the surface with the largest area is parallel to one of the two adjacent surfaces of the outer peripheral surface of the boss,
The angle formed by the other surface of the outer surface of the reinforcing rib facing the surface having the largest area and the other of the two adjacent surfaces of the outer peripheral surface of the boss is less than 90 °. The listed boss.
JP2006345694A 2006-12-22 2006-12-22 Boss with screw hole Expired - Fee Related JP4437132B2 (en)

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JP4437132B2 true JP4437132B2 (en) 2010-03-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4372237A1 (en) * 2022-11-16 2024-05-22 Aptiv Technologies AG Screw boss

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KR101002602B1 (en) 2008-10-07 2010-12-20 이문재 Relay socket with electric cord connection portion reinforcement structure
JP6120164B2 (en) * 2013-05-31 2017-04-26 テイ・エス テック株式会社 Interior member mounting structure
JP6061839B2 (en) * 2013-12-25 2017-01-18 三菱電機株式会社 Ventilation fan
CN105725549B (en) * 2016-04-13 2017-12-29 博洛尼家居用品湖北有限公司 Magnetic cabinet body connecting piece and mounting method thereof
JP7484620B2 (en) 2020-09-25 2024-05-16 サクサ株式会社 Boss for tightening screws
KR102584469B1 (en) * 2022-03-25 2023-10-05 스코트라 주식회사 Top openable cover float

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4372237A1 (en) * 2022-11-16 2024-05-22 Aptiv Technologies AG Screw boss

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