JPS63115910A - Press-in pin to plastic part - Google Patents
Press-in pin to plastic partInfo
- Publication number
- JPS63115910A JPS63115910A JP26328686A JP26328686A JPS63115910A JP S63115910 A JPS63115910 A JP S63115910A JP 26328686 A JP26328686 A JP 26328686A JP 26328686 A JP26328686 A JP 26328686A JP S63115910 A JPS63115910 A JP S63115910A
- Authority
- JP
- Japan
- Prior art keywords
- press
- pin
- plastic part
- fit
- metal pin
- 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
- 230000001154 acute effect Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 25
- 238000010586 diagram Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Insertion Pins And Rivets (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、電子機器１時計、各種メカトロ製品に多用
されるプラスチック部品への圧入ピンに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a press-fit pin into a plastic part often used in electronic devices, watches, and various mechatronic products.
従来、第５図に示すように、頭部ローレット付の金属ピ
ン１をプラスチック部品３に圧入するとき、金属ピンエ
に下面０□を設けてプラスチック部品のクラックなど損
傷を防止する圧入作業が一般に知られている。Conventionally, as shown in Fig. 5, when a metal pin 1 with a knurled head is press-fitted into a plastic part 3, it is generally known that the metal pin is provided with a bottom surface 0□ to prevent damage such as cracks to the plastic part. It is being
しかし、従来のプラスチック部品への金属ピンの圧入作
業は、第５図、第６図に示すようにプラスチック部品１
の肉厚ｇによって、金属ピンｌの下面０□部が圧入締代
ｅのとき発生する応力Ｘ。However, the conventional press-fitting work of metal pins into plastic parts is difficult as shown in Figures 5 and 6.
Due to wall thickness g, stress
Ｙ、Ｘ＋）’で、プラスチック部品２の肉厚部ｇに曲げ
、引張り応力が集中し、プラスチック部品にクラックを
発生させるという欠点があった。Y, X+)', the bending and tensile stress concentrates on the thick part g of the plastic part 2, which has the drawback of causing cracks in the plastic part.
そこでこの発明は、従来の欠点を解決するため、圧入金
属ピンの形状を改善し、プラスチック部品への圧入作業
時にクラックなど損傷を防止することを目的とする。Therefore, in order to solve the conventional drawbacks, the present invention aims to improve the shape of press-fit metal pins and prevent damage such as cracks during press-fitting work into plastic parts.
上記の問題点を解決するため、この発明は第１図におい
て、圧入する金属ピン１の頭部ローレットの外周ａと下
面０１からなる鋭角のコーナー形状すを設けて、金属ピ
ン圧入時のプラスチック部品への曲げ、引張り応用を減
少させ、損傷防止の圧入ピンを可能とした。In order to solve the above-mentioned problems, the present invention provides an acute corner shape consisting of the outer periphery a and the lower surface 01 of the head knurling of the metal pin 1 to be press-fitted, as shown in FIG. This reduces bending and tensile applications, making it possible to use press-fit pins to prevent damage.
上記のように圧入する金属ピンは、第２図に示すように
、圧入時に鋭角なコーナーｂ、０．は圧入締代ｅのとき
発生する応カマ ７ｆでプラスチック部品２に対し、は
ぼ剪断応力のみで、肉厚部ｇに、曲げ、引張り応力が集
中しなくなり、また、剪断されたプラスチックが金属ピ
ン１とプラスチック部品２との空隙ｃ、ｄに収容される
ため、金属ピン１は、プラスチック部品２のピン受台ｆ
に確実に密着し、金属ピン圧入時のプラスチック部品の
損傷を防止する効果を得ることができる。As shown in FIG. 2, the metal pin that is press-fitted as described above has an acute corner b, 0. is the stress generated when the press-fitting allowance is e. At 7f, only shear stress is applied to the plastic part 2, and bending and tensile stress are no longer concentrated in the thick wall part g, and the sheared plastic is pushed against the metal pin. 1 and the plastic part 2, the metal pin 1 is accommodated in the gaps c and d between the plastic part 2 and the pin holder f of the plastic part 2.
It is possible to securely adhere to the metal pin and prevent damage to plastic parts when press-fitting the metal pin.
′ 以下に、この発明の実施例を図面に基づいて説明
する。' Examples of the present invention will be described below based on the drawings.
第３図、第４図において、プラスチック部品２に金属ピ
ン（頭部ローレフトつき）１を圧入する、圧入時に発生
する剪断応力は肉厚部ｇに対し曲げ、引張り応力が集中
せず、かつ、金属ピン１の鋭角コーナーｂとＯＩで剪断
されたプラスチックが空隙ｄ、ｅに収容されて、プラス
チック部品２のピン受台ｆに確実に密着し、金属ピン圧
入時のプラスチック部品の損傷を防止することを可能と
した。In FIGS. 3 and 4, the metal pin (with a low left head) 1 is press-fitted into the plastic part 2. The shear stress generated during press-fitting bends against the thick wall part g, and the tensile stress is not concentrated, and The plastic sheared at the acute corner b and OI of the metal pin 1 is accommodated in the gaps d and e, and is securely attached to the pin holder f of the plastic part 2 to prevent damage to the plastic part when the metal pin is press-fitted. made it possible.
この発明は、以上説明したように圧入する金属ピンの１
部の形状を変えたという簡単な方法でプラスチック部品
の薄肉部の、４ｉｌｉｆｊ！的強度が問題（クラックな
ど）となる個所へ金属ピン圧入可能とした効果がある。This invention provides one of the metal pins to be press-fitted as explained above.
4ilifj! of thin-walled parts of plastic parts by simply changing the shape of the parts. This has the effect of making it possible to press-fit metal pins into areas where mechanical strength is a problem (such as cracks).
第１図は、この発明の頭部ローレット付金属ピン、第３
図、第４図は、金属ピンを圧入した時の状態図、第２図
は、金属ピンを圧入するときプラスチック部品に発生す
る剪断応力の状態図、第５図、第６図は、従来の金属ピ
ンの圧入状態図である。
１・・・金属ピン（頭部ローレット付）２・・・プラス
チック部品
ａ・・・金属ピン頭部外周
ｂ・・・金属ピン鋭角コーナー
０１・・・金属ピン鋭角
Ｃ・・・空隙
ｄ・・・空隙（ローレット部）
ｅ・・・圧入締代
ｆ・・・ピン受台
ｇ・・・肉厚部
Ｘ・・・応力
ｙ・・・応力
罰７・・・合成応力
以上
出願人 セイコー電子工業株式会社
代理人 弁理士 最 上 務（他１名）Ｖ輛
本発明の頭Ｆ４￥ローレットｔｔ金属ピン弔 １ 図
千 ２図
１ ？
金属ピンを圧入した峙の状態図
第３図
金Ａピンε圧入しＩＣ峙の状態図
第４図
を尻来の４１−属ヒ゛ン圧入イ太！Ｖ図第５図
従来の４Ａピン反入状Ｐ図
第６図FIG. 1 shows the metal pin with knurled head of the present invention, the third
Fig. 4 is a state diagram when a metal pin is press-fitted, Fig. 2 is a state diagram of shear stress generated in a plastic part when a metal pin is press-fitted, and Figs. 5 and 6 are state diagrams of the conventional FIG. 3 is a diagram showing a state in which metal pins are press-fitted. 1...Metal pin (with head knurling) 2...Plastic part a...Metal pin head outer periphery b...Metal pin acute angle corner 01...Metal pin acute angle C...Gap d...・Gap (knurling part) e...Press-fitting allowance f...Pin holder g...Thick wall part X...Stress y...Stress penalty 7...Combined stress or more Applicant Seiko Electronics Agent Co., Ltd. Patent Attorney Tsutomu Mogami (and 1 other person) V Vehicle Head of the Invention F4 ￥ Knurled tt Metal Pin Funeral 1 Figure 1,000 2 Figure 1 ? Fig. 3 shows the state of the metal pins pressed in. Figure 4 shows the state of the IC faces with the metal A pin ε pressed in. Figure V Figure 5 Conventional 4A pin reversal Figure P Figure 6
Claims (3)
制する形状及びプラスチック部品のクラックなど損傷を
防止する形状を有することを特徴とする圧入ピン。(1) A press-fit pin characterized by having a shape that regulates the direction of stress when the pin is press-fitted into a plastic part and a shape that prevents damage such as cracks to the plastic part.
を特徴とする特許請求の範囲第１項記載の圧入ピン。(2) The press-fit pin according to claim 1, wherein the press-fit pin has an acute corner on the press-fit side.
る空隙を有することを特徴とする特許請求の範囲第１項
記載の圧入ピン。(3) The press-fit pin according to claim 1, wherein the press-fit pin has a gap that accommodates shear debris generated during press-fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26328686A JPS63115910A (en) | 1986-11-05 | 1986-11-05 | Press-in pin to plastic part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26328686A JPS63115910A (en) | 1986-11-05 | 1986-11-05 | Press-in pin to plastic part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63115910A true JPS63115910A (en) | 1988-05-20 |
Family
ID=17387357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26328686A Pending JPS63115910A (en) | 1986-11-05 | 1986-11-05 | Press-in pin to plastic part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63115910A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016023695A (en) * | 2014-07-18 | 2016-02-08 | 日本電産シンポ株式会社 | Speed reducer |
-
1986
- 1986-11-05 JP JP26328686A patent/JPS63115910A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016023695A (en) * | 2014-07-18 | 2016-02-08 | 日本電産シンポ株式会社 | Speed reducer |
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