JPS5846717B2 - Fixed structure of watch glass part - Google Patents
Fixed structure of watch glass partInfo
- Publication number
- JPS5846717B2 JPS5846717B2 JP3480276A JP3480276A JPS5846717B2 JP S5846717 B2 JPS5846717 B2 JP S5846717B2 JP 3480276 A JP3480276 A JP 3480276A JP 3480276 A JP3480276 A JP 3480276A JP S5846717 B2 JPS5846717 B2 JP S5846717B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- adhesive
- cover glass
- present
- glass part
- 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.)
- Expired
Links
- 239000011521 glass Substances 0.000 title claims description 11
- 239000006059 cover glass Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 229920001187 thermosetting polymer Polymers 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims 1
- 239000002184 metal Substances 0.000 description 9
- 239000012790 adhesive layer Substances 0.000 description 8
- 229920006332 epoxy adhesive Polymers 0.000 description 4
- 229920001169 thermoplastic Polymers 0.000 description 4
- 239000004416 thermosoftening plastic Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920006284 nylon film Polymers 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Landscapes
- Joining Of Glass To Other Materials (AREA)
Description
【発明の詳細な説明】
本発明は、腕時計用カバーガラスとして無機ガラスを時
計ケースまたは金属リングに接着する場合の固定構造に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing structure for bonding inorganic glass as a cover glass for a wristwatch to a watch case or a metal ring.
時計カバーガラスを時計ケースまたは金属リングに熱硬
化性樹脂フィルム接着剤にて固定する時計ケースの構造
は、多く提案され実施されている。Many watch case structures have been proposed and implemented in which a watch cover glass is fixed to a watch case or a metal ring using a thermosetting resin film adhesive.
この熱硬化性樹脂接着剤を使用することによる利点は、
時計カバーガラスの取付固定手段が容易で接着面積が狭
く、しかも部品点数の削減と同時に仕上り程度が良好な
る利点を持っている。The advantages of using this thermosetting resin adhesive are:
It has the advantage that the means for attaching and fixing the watch cover glass is easy, the adhesive area is small, and the number of parts is reduced and the finish is good.
しかしながら、このように熱硬化性樹脂接着剤を使って
カバーガラスと金属リングを接着すると、カバーガラス
と金属リングの熱膨張係数差がきわめて太きいため、歪
が生じカバーガラスの剥離を起こすという欠点があった
。However, when a thermosetting resin adhesive is used to bond a cover glass and a metal ring, the difference in thermal expansion coefficient between the cover glass and the metal ring is extremely large, which causes distortion and causes the cover glass to peel off. was there.
即ち、無機カバーガラスに用いられる硼ケイ酸ガラスの
熱膨張係数は８８×１０−７層°Ｃ，ガラスリングに用
いられる黄銅の熱膨張係数は２１０×１０−７層℃であ
り、これら両者をフィルム状熱硬化性エポキシ接着剤を
介して２００℃の高温で接着すると、まず２００℃にお
いて相対的ズレを生じる。That is, the thermal expansion coefficient of borosilicate glass used for the inorganic cover glass is 88 x 10-7 layers °C, and the thermal expansion coefficient of brass used for the glass ring is 210 x 10-7 layers °C. When bonding is performed at a high temperature of 200°C using a film-like thermosetting epoxy adhesive, relative displacement occurs at 200°C.
その後次第に温度を降下させていくと、エポキシ接着剤
のガラス転移点までは相対的ズレは生じてもそれは接着
剤層の粘弾性的挙動によって吸収される。When the temperature is then gradually lowered, even if a relative shift occurs up to the glass transition point of the epoxy adhesive, it is absorbed by the viscoelastic behavior of the adhesive layer.
しかし、１１０℃以下になるとエポキシ接着剤はガラス
状に固化するため、接着剤層は相対的ズレを吸収するこ
とはできず、常温に戻ったときはズレはそのまま残り接
着前とは異なった状態となる。However, at temperatures below 110°C, the epoxy adhesive solidifies into a glass-like state, so the adhesive layer cannot absorb the relative misalignment, and when the temperature returns to room temperature, the misalignment remains and the state is different from before bonding. becomes.
このズレは、例えばリング径３０ｍｍψのものでは１５
μｍにも達し、外周部１間幅を接着したとすると、その
接着層の外周部には１５０ｋｇ／−という大きな剪断力
がかかることになる。For example, for a ring with a diameter of 30 mm, this deviation is 15
If the width of the outer circumferential portion were to be bonded, a large shearing force of 150 kg/− would be applied to the outer circumferential portion of the adhesive layer.
これはこの接着剤の剪断破壊強度２８０ｋｇ／ｃｙｙｔ
の約１／２に相当する。This is the shear breaking strength of this adhesive: 280 kg/cyyt
This corresponds to approximately 1/2 of
このように、従来品は無機カバーガラスとガラスリング
との相対的なずれにより応力が発生し、接着部の劣化、
剥離を招いていた。In this way, with conventional products, stress is generated due to the relative misalignment between the inorganic cover glass and the glass ring, resulting in deterioration of the bonded area and
It was causing separation.
本発明は上記の欠点を解消するもので、熱硬化性樹脂接
着剤の間にナイロン等の熱可塑性接着剤をはさんだ３層
の接着フィルムでガラスと金属リングを接着し、ナイロ
ンのたわみ性により接着部の歪を除去するものである。The present invention solves the above-mentioned drawbacks by bonding glass and metal rings using a three-layer adhesive film with a thermoplastic adhesive such as nylon sandwiched between thermosetting resin adhesives. This removes distortion in the bonded area.
以下、実施例により本発明を説明する。The present invention will be explained below with reference to Examples.
第１図は、本発明による接着剤断面であり、接着剤層を
３層とし、熱硬化性エポキシフィルム１の中間に熱可塑
性のナイロンフィルム２をはさんである。FIG. 1 shows a cross section of an adhesive according to the present invention, which has three adhesive layers, and a thermoplastic nylon film 2 is sandwiched between a thermosetting epoxy film 1.
第２図は、本発明によりガラスとリングを接着する場合
の断面図であり、３は無機カバーガラス、４は金属リン
グ、５は接着剤層である。FIG. 2 is a cross-sectional view when glass and a ring are bonded together according to the present invention, where 3 is an inorganic cover glass, 4 is a metal ring, and 5 is an adhesive layer.
このカバーガラスと金属リングを治具等で接着し接着剤
を加圧して炉内で加熱する。This cover glass and metal ring are bonded together using a jig or the like, and the adhesive is pressurized and heated in a furnace.
加熱はエポキシ接着剤が完全硬化するまで行なう。Heating is continued until the epoxy adhesive is completely cured.
その後、炉からとり出して放冷し、常温まで冷却したの
ちに治具等を外す。After that, it is taken out from the furnace and left to cool, and after cooling to room temperature, the jig etc. are removed.
このようにして接着したガラスと金属リングは、中間に
はさんだ熱可塑性ナイロンフィルムにたわみ性があるた
め、この部分で接着層に生じる歪みを吸収することがで
きる。Since the thermoplastic nylon film sandwiched between the glass and metal ring bonded together in this way has flexibility, this part can absorb the strain that occurs in the adhesive layer.
第３図は、従来の方法と本発明の方法で接着固定された
場合のカバーガラス上面の平面度をオプチカルフラット
を用いて測定した場合を示すもので、第３図イの従来の
方法の場合は、接着層のひずみを緩和できず、ガラスが
上方にわん曲してニュートンリングが生じていることを
示しており、第３図口の本発明の場合は、横縞が生じ、
殆ど平面であり、ひずみがないことを示している。Figure 3 shows the flatness of the top surface of the cover glass when it is adhesively fixed by the conventional method and the method of the present invention, measured using an optical flat. This shows that the strain in the adhesive layer cannot be alleviated, causing the glass to curve upward, resulting in Newton's rings. In the case of the present invention shown in Figure 3, horizontal stripes occur,
It is almost flat, indicating that there is no distortion.
以上のように本発明方法によれば、従来の欠点を解消し
、時間経過に伴って発生する剥離、外れという致命的な
欠陥を完全に防止することができる。As described above, according to the method of the present invention, it is possible to eliminate the conventional drawbacks and completely prevent fatal defects such as peeling and detachment that occur over time.
第１図は、本発明による接着剤の断面図、第２図は、本
発明によりガラスとリングを接着する場合の断面図、第
３図イは、従来方法で、口は、本発明方法で接着固定し
たカバーガラスなオプチカルフラットで覗いた平面図で
ある。
１・・・・・・熱硬化性エポキシフィルム、２・・・・
・・熱可塑性ナイロンフィルム、３・・・・・・無機カ
バーガラス、４・・・・・・金属リング、５・・・・・
・接着剤層。Fig. 1 is a cross-sectional view of the adhesive according to the present invention, Fig. 2 is a cross-sectional view when glass and a ring are bonded according to the present invention, Fig. 3 A is a conventional method, and the mouth is bonded by the present method. It is a plan view seen through an optical flat cover glass fixed with adhesive. 1...Thermosetting epoxy film, 2...
...Thermoplastic nylon film, 3...Inorganic cover glass, 4...Metal ring, 5...
・Adhesive layer.
Claims (1)
硬化性樹脂フィルムの３層からなるフィルム接着剤によ
り、カバーガラスとガラスリング又は時計ケースを接着
固定したことを特徴とする時計用ガラス部の固定構造。1 Fixation of a watch glass part characterized in that a cover glass and a glass ring or a watch case are adhesively fixed with a film adhesive consisting of three layers: a thermosetting resin film, a thermoplastic resin film, and a thermosetting resin film. structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3480276A JPS5846717B2 (en) | 1976-03-29 | 1976-03-29 | Fixed structure of watch glass part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3480276A JPS5846717B2 (en) | 1976-03-29 | 1976-03-29 | Fixed structure of watch glass part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52117671A JPS52117671A (en) | 1977-10-03 |
| JPS5846717B2 true JPS5846717B2 (en) | 1983-10-18 |
Family
ID=12424358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3480276A Expired JPS5846717B2 (en) | 1976-03-29 | 1976-03-29 | Fixed structure of watch glass part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5846717B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04352640A (en) * | 1991-05-28 | 1992-12-07 | Sanwa Kinzoku:Kk | Metallic plate made vessel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS565363A (en) * | 1979-06-21 | 1981-01-20 | Seiko Instr & Electronics Ltd | Bonding of cover glass for wrist watch case |
| EP2941347B1 (en) * | 2013-01-07 | 2021-06-02 | Corning Incorporated | Strengthened laminated glass structures |
-
1976
- 1976-03-29 JP JP3480276A patent/JPS5846717B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04352640A (en) * | 1991-05-28 | 1992-12-07 | Sanwa Kinzoku:Kk | Metallic plate made vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52117671A (en) | 1977-10-03 |
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