JPH10318239A - Mounting structure of package made of resin - Google Patents
Mounting structure of package made of resinInfo
- Publication number
- JPH10318239A JPH10318239A JP12523497A JP12523497A JPH10318239A JP H10318239 A JPH10318239 A JP H10318239A JP 12523497 A JP12523497 A JP 12523497A JP 12523497 A JP12523497 A JP 12523497A JP H10318239 A JPH10318239 A JP H10318239A
- Authority
- JP
- Japan
- Prior art keywords
- mounting seat
- screw
- resin
- screw hole
- reinforcing bush
- 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.)
- Withdrawn
Links
Landscapes
- Bolts, Nuts, And Washers (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、例えば自動車の
エンジンルームなどのように過酷な環境に搭載して使用
する圧力センサなどの電子部品に好適な樹脂製パッケー
ジの取付構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a resin package suitable for an electronic component such as a pressure sensor mounted and used in a severe environment such as an engine room of an automobile.
【0002】[0002]
【従来の技術】周知のように自動車のエンジンルームに
は圧力センサなど各種の電子部品が組み込まれており、
その取付け手段として、電子部品の樹脂ケースを小ねじ
などを使って固定するようにしている。次に、自動車エ
ンジンに取付ける圧力センサを例に、従来における樹脂
製パッケージの取付構造を図3,図4に示す。図3にお
いて、1は樹脂成形品として作られた圧力センサの樹脂
ケース、2は外部接続端子、3は導圧パイプであり、樹
脂ケース1から側方に張り出した取付座1aにはねじ穴
1bが開口しており、このねじ穴1bに締結ねじ4を挿
入して相手側の固定部(自動車のエンジンボディ)5に
ねじ止め固定するようにしている。2. Description of the Related Art As is well known, various electronic components such as a pressure sensor are incorporated in an engine room of an automobile.
As a mounting means, the resin case of the electronic component is fixed using small screws or the like. Next, FIGS. 3 and 4 show a conventional mounting structure of a resin package, taking a pressure sensor mounted on an automobile engine as an example. In FIG. 3, 1 is a resin case of a pressure sensor made as a resin molded product, 2 is an external connection terminal, 3 is a pressure guiding pipe, and a screw hole 1b is provided in a mounting seat 1a protruding laterally from the resin case 1. The fastening screw 4 is inserted into the screw hole 1b, and is screwed and fixed to a fixing portion (an engine body of an automobile) 5 on the other side.
【0003】ここで、従来の製品においては、図4に示
すようにねじ穴1bに金属製の補強ブッシュ6をインサ
ートして樹脂ケース1と一体成形している。この補強ブ
ッシュ6は、ねじ締結時に加わる締め付け力をブッシュ
で受け止め、樹脂成形品である取付座1aに締め付け応
力が加わるのを防ぐ役目を果たすものであり、従来の取
付構造では補強ブッシュの高さ寸法Aを取付座1bのね
じ穴深さBに合わせ、補強ブッシュ6の端面が取付座1
bの座面と面一になるようにしている。Here, in a conventional product, as shown in FIG. 4, a metal reinforcing bush 6 is inserted into a screw hole 1b and is integrally formed with the resin case 1. The reinforcing bush 6 receives the tightening force applied at the time of screw fastening by the bush, and serves to prevent the tightening stress from being applied to the mounting seat 1a, which is a resin molded product. Dimension A is matched with screw hole depth B of mounting seat 1b, and the end face of reinforcing bush 6 is
It is made to be flush with the seat surface of b.
【0004】[0004]
【発明が解決しようとする課題】ところで、前記のよう
に構成した従来の取付構造では、次記のような問題点が
ある。すなわち、補強ブッシュ6を樹脂ケース1にイン
サート成形する際には、樹脂ケースの成形金型に補強ブ
ッシュ6をインサートした上で、金型に成形樹脂を注入
して一体成形するようにしている。この場合に、取付座
1aのねじ穴1bにインサートされた補強ブッシュ6の
位置が、図4で示すように取付座1aの端面と正確に一
致していればよいが、実際には補強ブッシュ6の寸法公
差,成形金型の型締力のばらつきなどが原因で、図5で
示すように補強ブッシュ6が取付座1aの座面より内側
に引っ込んだ状態に仕上がることが多々ある。The conventional mounting structure constructed as described above has the following problems. That is, when the reinforcing bush 6 is insert-molded into the resin case 1, the reinforcing bush 6 is inserted into a molding die of the resin case, and then a molding resin is injected into the mold to be integrally molded. In this case, the position of the reinforcing bush 6 inserted into the screw hole 1b of the mounting seat 1a may exactly coincide with the end face of the mounting seat 1a as shown in FIG. In many cases, the reinforcing bush 6 is retracted inward from the seat surface of the mounting seat 1a as shown in FIG.
【0005】このような製品をその取付け相手側の固定
部(例えば自動車のエンジンボディ)にねじ止めする
と、図示のように締結ねじ4のねじ頭4aが取付座1a
の端面(ねじ穴1bの縁)に当たり、ねじの締め付け応
力が樹脂成形品である取付座1aに直接加わるようにな
る。しかも、このように締め付け応力が加わった取付状
態のままで長期間に亘って過酷な周囲環境(自動車エン
ジンルームの温度,湿度,機械的な振動など)に晒され
ると、樹脂自身の劣化も加わって取付座1aにクラッ
ク,割れなどが生じてねじの緩みが生じ、これが原因で
電子部品が不測に脱落してしまうといった重大なトラブ
ルに発展するおそれがある。When such a product is screwed to a fixed portion (for example, an engine body of an automobile) of the mating side of the product, the screw head 4a of the fastening screw 4 is attached to the mounting seat 1a as shown in the figure.
(The edge of the screw hole 1b), and the tightening stress of the screw is directly applied to the mounting seat 1a which is a resin molded product. In addition, when exposed to severe environmental conditions (temperature, humidity, mechanical vibrations, etc. of an automobile engine room) for a long period of time in the mounted state where the tightening stress is applied, the resin itself also deteriorates. As a result, cracks and cracks may occur in the mounting seat 1a and loosening of the screw may occur, which may lead to a serious trouble that the electronic component may fall off unexpectedly.
【0006】この発明は上記の点に鑑みなされたもので
あり、その目的は前記課題を解決し、過酷な使用環境の
下でも、電子部品を長期間安定よくねじ止め固定できる
ように改良して信頼性の向上化を図った樹脂製パッケー
ジの取付構造を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to solve the above-mentioned problems and to improve the electronic components so that they can be screwed and fixed stably for a long period of time even in a severe use environment. It is an object of the present invention to provide a resin package mounting structure with improved reliability.
【0007】[0007]
【課題を解決するための手段】上記目的を達成するため
に、この発明によれば、樹脂成形品としてなる樹脂ケー
スの取付座に金属製の補強ブッシュをインサートしたね
じ穴を設け、該ねじ穴に締結ねじを挿入して相手側の固
定部にねじ止めしたものにおいて、補強ブッシュの高さ
寸法を取付座のねじ穴深さよりも大に設定し、かつ取付
座へのインサート位置で補強ブッシュの端面を取付座の
座面より突き出すように構成するものとする。(請求項
1) また、前記構成の応用例として、樹脂ケースの取付座の
端面にねじ穴を包囲して締結ねじのねじ頭が入り込む凹
所を形成した構成がある。(請求項2)上記の構成によ
れば、樹脂ケースをねじ止め固定した状態では、締結ね
じの締め付け力が全て補強ブッシュに加わり、樹脂成形
品である取付座に締め付け応力が直接加わることがな
い。これにより、実使用状態で製品が過酷な環境変化に
晒されても、取付座の機械的劣化に起因する締結ねじの
緩みを防いで長期間安定した固定状態を維持できる。According to the present invention, a screw hole having a metal reinforcing bush inserted therein is provided in a mounting seat of a resin case as a resin molded product. The height of the reinforcing bush is set to be larger than the screw hole depth of the mounting seat, and the reinforcing bush is inserted into the mounting seat. The end surface is configured to protrude from the seat surface of the mounting seat. (Claim 1) As an application example of the above configuration, there is a configuration in which a recess is formed in an end surface of a mounting seat of a resin case so as to surround a screw hole and into which a screw head of a fastening screw enters. (Claim 2) According to the above configuration, when the resin case is screwed and fixed, all the tightening force of the fastening screw is applied to the reinforcing bush, and no tightening stress is directly applied to the mounting seat which is a resin molded product. . As a result, even if the product is exposed to severe environmental changes in the actual use state, the fastening screw can be prevented from loosening due to mechanical deterioration of the mounting seat, and a stable fixed state can be maintained for a long time.
【0008】[0008]
【発明の実施の形態】以下、この発明の実施の形態を図
示実施例で説明する。なお、各実施例の図中で図4に対
応する同一部材には同じ符号が付してある。 〔実施例1〕図1において、樹脂ケース1の取付座1a
のねじ穴1bにインサートした金属製の補強ブッシュ6
は、寸法公差分を配慮してその高さ寸法Aがねじ穴1b
の穴深さBよりも大で設定されており、かつ樹脂ケース
1にインサート成形する際に補強ブッシュ6の両端面が
取付座1aの上下座面より突き出すよう構成されてい
る。なお、補強ブッシュ6は樹脂ケース1と一体にイン
サート成形するほか、取付座1aのねじ穴1bに圧入し
て取付けることもできる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings. In the drawings of each embodiment, the same members corresponding to FIG. 4 are denoted by the same reference numerals. [Embodiment 1] In FIG. 1, a mounting seat 1a of a resin case 1 is shown.
Metal reinforcing bush 6 inserted in screw hole 1b
Means that the height dimension A is the screw hole 1b
The hole depth B is set to be larger than the hole depth B, and both end surfaces of the reinforcing bush 6 project from the upper and lower seat surfaces of the mounting seat 1a when insert-molding the resin case 1. The reinforcing bush 6 may be insert-molded integrally with the resin case 1 or may be press-fitted into the screw hole 1b of the mounting seat 1a.
【0009】かかる構成で、取付座1aのねじ穴1bに
挿入した締結ねじ4を相手側の固定部5にねじ込んで樹
脂ケース1を固定した状態では、補強ブッシュ6の上下
両端面がそれぞれ固定部5の取付面,締結ねじ4のねじ
頭4aに当たってねじの締め付け力を補強ブッシュ6が
受け止め、樹脂成形品である樹脂ケース1の取付座1a
にはねじの締め付け応力が加わることがない。これによ
り、取付座1aの樹脂の経年劣化などが原因で締結ねじ
4が緩むことがなく、樹脂ケース1を長期間に亘り安定
した状態で締結固定できる。With such a configuration, when the resin case 1 is fixed by screwing the fastening screw 4 inserted into the screw hole 1b of the mounting seat 1a into the fixing portion 5 on the mating side, the upper and lower end surfaces of the reinforcing bush 6 are respectively fixed to the fixing portion. The reinforcing bush 6 receives the tightening force of the screw against the mounting surface 5 and the screw head 4a of the fastening screw 4, and the mounting seat 1a of the resin case 1 which is a resin molded product.
Is not subjected to screw tightening stress. Thereby, the fastening screw 4 is not loosened due to aging of the resin of the mounting seat 1a, and the resin case 1 can be fastened and fixed in a stable state for a long period of time.
【0010】〔実施例2〕図2はこの発明の請求項2に
対応する応用実施例を示すものである。この実施例にお
いては、樹脂ケース1の取付座1aの上面に、ねじ穴1
bを包囲して締結ねじ4のねじ頭が入り込む凹所1c
(凹所の穴径はねじ頭4aの直径よりも大)が形成され
ており、その底部に補強ブッシュ6の上端が突き出して
いる。[Embodiment 2] FIG. 2 shows an application embodiment corresponding to claim 2 of the present invention. In this embodiment, a screw hole 1 is provided on the upper surface of the mounting seat 1a of the resin case 1.
recess 1c surrounding screw b and into which the screw head of fastening screw 4 enters
(The hole diameter of the recess is larger than the diameter of the screw head 4a), and the upper end of the reinforcing bush 6 protrudes from the bottom.
【0011】かかる構成により、先記実施例1と同等な
機能が得られるほか、補強ブッシュ6の上端部が取付座
1aから突き出すことがないので、製品の保管,取扱い
時に補強ブッシュ6に物が当たって変形するなどといっ
て不具合が回避できる。With this configuration, the same function as that of the first embodiment can be obtained. In addition, since the upper end of the reinforcing bush 6 does not protrude from the mounting seat 1a, an object is placed on the reinforcing bush 6 during storage and handling of a product. Problems such as deformation due to hitting can be avoided.
【0012】[0012]
【発明の効果】以上述べたように、この発明の構成によ
れば、樹脂ケースを取付け相手側の固定部にねじ止め固
定する際に、ねじの締め付け力応力が樹脂ケースの取付
座に加わることがなく、これにより従来構造のように樹
脂成形品に加わる応力に起因する機械的な劣化,締結ね
じの緩み発生を防止して過酷な使用環境の下でも長期間
安定した固定状態を維持できて製品の取付構造に対する
信頼性が向上する。As described above, according to the structure of the present invention, when the resin case is screwed and fixed to the fixing portion on the mating side, the tightening force of the screw is applied to the mounting seat of the resin case. As a result, mechanical deterioration due to stress applied to the resin molded product and loosening of fastening screws as in the conventional structure can be prevented, and a stable fixed state can be maintained for a long period of time even in a severe use environment. The reliability of the product mounting structure is improved.
【0013】また、補強ブッシュを樹脂ケースにインサ
ート形成する際には、補強ブッシュの厳格な寸法管理,
成形金型の型締め調整などの特別な配慮が不要でそれだ
け成形品の品質管理が楽になり、歩留りも向上する。In addition, when the reinforcing bush is formed as an insert in the resin case, strict dimensional control of the reinforcing bush,
There is no need to take special considerations such as adjusting the clamping of the molding dies, which makes the quality control of molded products easier and improves the yield.
【図1】この発明の実施例1に対応する樹脂パッケージ
の取付構造を表す断面図FIG. 1 is a cross-sectional view illustrating a mounting structure of a resin package according to a first embodiment of the present invention.
【図2】この発明の実施例2に対応する樹脂パッケージ
の取付構造を表す断面図FIG. 2 is a sectional view showing a resin package mounting structure according to a second embodiment of the present invention;
【図3】この発明の実施対象として例示した圧力センサ
の外観図FIG. 3 is an external view of a pressure sensor exemplified as an embodiment of the present invention.
【図4】従来における樹脂パッケージの取付構造を表す
断面図FIG. 4 is a cross-sectional view illustrating a conventional resin package mounting structure.
【図5】図4の従来構造で樹脂パッケージの取付部に寸
法のばらつきが生じている場合の状態を表す図FIG. 5 is a diagram showing a state in which dimensional variation occurs in a mounting portion of a resin package in the conventional structure of FIG. 4;
1 樹脂ケース 1a 取付座 1b ねじ穴 1c 凹所 4 締結ねじ 4a ねじ頭 5 固定部 6 補強ブッシュ Reference Signs List 1 resin case 1a mounting seat 1b screw hole 1c recess 4 fastening screw 4a screw head 5 fixing part 6 reinforcing bush
Claims (2)
作られた樹脂ケースの取付座に金属製の補強ブッシュを
インサートしたねじ穴を設け、該ねじ穴に締結ねじを挿
入して相手側の固定部にねじ止めしたものにおいて、補
強ブッシュの高さ寸法を取付座のねじ穴深さよりも大に
設定し、かつ取付座へのインサート位置で補強ブッシュ
の端面を取付座の座面より突き出したことを特徴とする
樹脂製パッケージの取付構造。1. A screw hole in which a metal reinforcing bush is inserted is provided in a mounting seat of a resin case made of a resin molded product for an electronic component or the like, and a fastening screw is inserted into the screw hole to form a mating member. When the screw is fixed to the fixed part on the side, the height of the reinforcing bush is set to be larger than the screw hole depth of the mounting seat, and the end face of the reinforcing bush is inserted from the seat surface of the mounting seat at the insert position to the mounting seat. Mounting structure of resin package characterized by protruding.
ースの取付座の端面にねじ穴を包囲して締結ねじのねじ
頭が入り込む凹所を形成したことを特徴とする樹脂製パ
ッケージの取付構造。2. The mounting structure according to claim 1, wherein a recess is formed in the end surface of the mounting seat of the resin case so as to surround the screw hole and into which the screw head of the fastening screw enters. Construction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12523497A JPH10318239A (en) | 1997-05-15 | 1997-05-15 | Mounting structure of package made of resin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12523497A JPH10318239A (en) | 1997-05-15 | 1997-05-15 | Mounting structure of package made of resin |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10318239A true JPH10318239A (en) | 1998-12-02 |
Family
ID=14905137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12523497A Withdrawn JPH10318239A (en) | 1997-05-15 | 1997-05-15 | Mounting structure of package made of resin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10318239A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100533481B1 (en) * | 1998-12-31 | 2006-01-27 | 주식회사 데크 | Method of forming reinforced bolt hole in a multi-player |
JP2014179376A (en) * | 2013-03-13 | 2014-09-25 | Mitsubishi Electric Corp | Semiconductor device and manufacturing method of the same |
-
1997
- 1997-05-15 JP JP12523497A patent/JPH10318239A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100533481B1 (en) * | 1998-12-31 | 2006-01-27 | 주식회사 데크 | Method of forming reinforced bolt hole in a multi-player |
JP2014179376A (en) * | 2013-03-13 | 2014-09-25 | Mitsubishi Electric Corp | Semiconductor device and manufacturing method of the same |
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