JPS6342376Y2 - - Google Patents
Info
- Publication number
- JPS6342376Y2 JPS6342376Y2 JP5431882U JP5431882U JPS6342376Y2 JP S6342376 Y2 JPS6342376 Y2 JP S6342376Y2 JP 5431882 U JP5431882 U JP 5431882U JP 5431882 U JP5431882 U JP 5431882U JP S6342376 Y2 JPS6342376 Y2 JP S6342376Y2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- back cover
- watch case
- screw
- inner frame
- 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
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Casings For Electric Apparatus (AREA)
Description
【考案の詳細な説明】
本考案は時計用の樹脂ケースにおける裏蓋の固
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 a back cover in a resin case for a watch.
従来、樹脂により構成される時計ケースの裏蓋
を固定する構造として、時計ケースにタツプ穴を
設け、該時計ケースに裏蓋を、ネジを該タツプ穴
に螺合することにより固定するものが知られてい
る。この構造は金属のネジの回動により時計ケー
スのタツプ穴を螺刻してネジ穴を形成し、このネ
ジ嵌合によつて裏蓋を固定するものである。 Conventionally, as a structure for fixing the back cover of a watch case made of resin, a tap hole is provided in the watch case, and the back cover is fixed to the watch case by screwing the screw into the tap hole. It is being In this structure, a metal screw rotates to thread a tap hole in the watch case to form a screw hole, and the back cover is fixed by this screw fit.
しかし、この場合、樹脂の時計ケースとネジと
の固定力が弱いため、有効ネジ部の直径を大きく
し、またネジ深さも大きくとる必要があつた。そ
のため、時計ケースも大きくなり、また一度ネジ
を外すと樹脂の時計ケースのタツプ穴が塑性変形
するため、ネジの固定が弱くなるという欠点があ
つた。 However, in this case, since the fixing force between the resin watch case and the screw is weak, it is necessary to increase the diameter of the effective screw portion and also increase the screw depth. As a result, the watch case became larger, and once the screws were removed, the tap holes in the resin watch case were plastically deformed, making the screws less securely fixed.
本考案は以上の欠点を解消したもので、補強用
の金属板の内枠の外端に形成された屈曲部に設け
た孔と金属のネジとを裏蓋の貫通穴を介して螺合
させる構成で、裏蓋の固定力を高めネジ部の寸法
を小さくするとともに、時計ケースの小型化を計
ることを目的とする。 The present invention solves the above-mentioned drawbacks by screwing together a metal screw with a hole provided in a bent part formed at the outer end of an inner frame of a reinforcing metal plate through a through hole in the back cover. The purpose of this structure is to increase the fixing force of the case back, reduce the dimensions of the screw part, and downsize the watch case.
第1図は従来のネジ止めによる裏蓋の固定構造
を示す分解斜視図で、1は樹脂の時計ケース、2
は裏蓋、3は金属のネジである。樹脂の時計ケー
ス1には金属板によつて形成された内枠4が固着
されており、また4つのタツプ穴1aが樹脂の時
計ケースの下面に設けられている。裏蓋2は貫通
穴2aを介して金属のネジ3のタツプ穴1aへの
回動による螺刻で、時計ケース1に固定されてい
る。 Figure 1 is an exploded perspective view showing the conventional screw-fastening structure of the back cover, in which 1 is a resin watch case, 2
is the back cover, and 3 is a metal screw. An inner frame 4 formed of a metal plate is fixed to the resin watch case 1, and four tap holes 1a are provided on the lower surface of the resin watch case. The back cover 2 is fixed to the watch case 1 by screwing a metal screw 3 into the tap hole 1a through a through hole 2a.
第2図は第1図で示した従来の裏蓋の固定構造
の金属のネジ3の周辺部を示した断面図である。
樹脂の時計ケース1の内周部1bには補強用の内
枠4が、樹脂ケース1の製造時にインサート成形
により埋設されている。前記のごとく、この構造
では時計ケース1と裏蓋2との固定力を保つに
は、ネジ3とタツプ穴1aとの係合面積を大きく
とらねばならず、必然的に金属のネジ3の外径は
大きくなり時計ケース1も大型になつてしまう。 FIG. 2 is a sectional view showing the periphery of the metal screw 3 of the conventional back cover fixing structure shown in FIG.
A reinforcing inner frame 4 is embedded in the inner peripheral portion 1b of the resin watch case 1 by insert molding when the resin case 1 is manufactured. As mentioned above, in this structure, in order to maintain the fixing force between the watch case 1 and the back cover 2, the engagement area between the screw 3 and the tap hole 1a must be large, and the outside of the metal screw 3 must be made large. As the diameter becomes larger, the watch case 1 also becomes larger.
以下本考案の実施例を第3図及び第4図につい
て説明する。第3図は本考案による裏蓋の固定構
造に使用する金属板の内枠7を示す斜視図で、内
枠7の円筒部7aの外端に該円筒部7aより直角
に張り出した屈曲部7bがあり、該屈曲部7bに
は孔7cがある。第4図は第3図で示した内枠7
を用いた本考案の実施例の周辺部を示す断面図
で、内枠7の屈曲部7bは樹脂の時計ケース1に
埋設されている。裏蓋2は貫通穴2aを介してネ
ジ8を金属板の内枠7の屈曲部7bの孔7cに螺
合することにより固定されている。ここで、裏蓋
2と内枠7の円筒部7aとの間にはOリング9が
圧縮され防水性を保つており、裏蓋2は樹脂の時
計ケース1に埋設された内枠7の屈曲部7bの下
面に突設した受部1cに係合し固定されている。
したがつて、内枠7の屈曲部7bで直接裏蓋2を
係合させた場合に内枠7の円筒部7aに設ける段
部が不要であるので内枠7の加工負荷は小さくな
る。 Embodiments of the present invention will be described below with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing the inner frame 7 of the metal plate used in the fixing structure of the back cover according to the present invention, in which a bent portion 7b projects from the outer end of the cylindrical portion 7a of the inner frame 7 at a right angle from the cylindrical portion 7a. There is a hole 7c in the bent portion 7b. Figure 4 shows the inner frame 7 shown in Figure 3.
1 is a cross-sectional view showing the peripheral portion of an embodiment of the present invention using a watch case 1, in which a bent portion 7b of an inner frame 7 is embedded in a resin watch case 1. The back cover 2 is fixed by screwing a screw 8 into a hole 7c of a bent portion 7b of an inner frame 7 made of a metal plate through a through hole 2a. Here, an O-ring 9 is compressed between the back cover 2 and the cylindrical part 7a of the inner frame 7 to maintain waterproofness. It is engaged with and fixed to a receiving part 1c protruding from the lower surface of the part 7b.
Therefore, when the back cover 2 is directly engaged with the bent portion 7b of the inner frame 7, the step provided on the cylindrical portion 7a of the inner frame 7 is not required, so that the processing load on the inner frame 7 is reduced.
以上より明らかなように、本考案の構成によれ
ば小型のネジを用いて裏蓋の固定力を高めること
が出来るばかりでなく、時計ケースの小型化が可
能になつた。さらに、屈曲部を埋設することによ
り、Oリング圧縮を適正に行うストツパーを樹脂
で果しているので金属板の内枠の加工が容易とな
る。 As is clear from the above, the configuration of the present invention not only makes it possible to increase the fixing force of the back cover using small screws, but also makes it possible to downsize the watch case. Furthermore, by embedding the bent portion, the resin serves as a stopper for properly compressing the O-ring, making it easier to process the inner frame of the metal plate.
第1図は従来のネジ止めによる裏蓋の固定構造
を示す分解斜視図、第2図は第1図の裏蓋の固定
構造のネジの周辺部を示す断面図、第3図は本考
案による裏蓋の固定構造に使用する内枠を示す斜
視図、第4図は第3図の内枠を使用したネジ周辺
部を示す断面図である。
1……時計ケース、1a……タツプ穴、1b…
…内周部、1c……受部、2……裏蓋、2a……
貫通穴、3,8……ネジ、4,7……内枠、7a
……円筒部、7b……屈曲部、7c……孔、9…
…Oリング。
Fig. 1 is an exploded perspective view showing a conventional back cover fixing structure using screws, Fig. 2 is a sectional view showing the area around the screw of the back cover fixing structure in Fig. 1, and Fig. 3 is a structure according to the present invention. FIG. 4 is a perspective view showing the inner frame used in the back cover fixing structure, and FIG. 4 is a sectional view showing the area around the screw using the inner frame of FIG. 3. 1...Watch case, 1a...Tap hole, 1b...
...Inner peripheral part, 1c... Receiving part, 2... Back cover, 2a...
Through hole, 3, 8...Screw, 4, 7...Inner frame, 7a
... Cylindrical part, 7b... Bent part, 7c... Hole, 9...
...O-ring.
Claims (1)
板の内枠が外端に孔を有する屈曲部を形成されて
前記樹脂の中に埋設した時計ケースに、前記孔と
対応する貫通穴を設けた裏蓋を配設し、かつ前記
貫通穴を介してネジで裏蓋と孔を螺合により固定
したことを特徴とする裏蓋の固定構造。 A watch case made of resin, in which an inner frame of a metal plate is formed at least on the inner periphery with a bent part having a hole at the outer end, and is embedded in the resin, and a through hole corresponding to the hole is provided on the back side of the watch case. A fixing structure for a back cover, characterized in that a cover is provided, and the back cover and the hole are screwed together with a screw through the through hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5431882U JPS58158391U (en) | 1982-04-16 | 1982-04-16 | Fixed structure of the back cover |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5431882U JPS58158391U (en) | 1982-04-16 | 1982-04-16 | Fixed structure of the back cover |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58158391U JPS58158391U (en) | 1983-10-22 |
JPS6342376Y2 true JPS6342376Y2 (en) | 1988-11-07 |
Family
ID=30064943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5431882U Granted JPS58158391U (en) | 1982-04-16 | 1982-04-16 | Fixed structure of the back cover |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58158391U (en) |
-
1982
- 1982-04-16 JP JP5431882U patent/JPS58158391U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58158391U (en) | 1983-10-22 |
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