JPH0451392Y2 - - Google Patents
Info
- Publication number
- JPH0451392Y2 JPH0451392Y2 JP9406388U JP9406388U JPH0451392Y2 JP H0451392 Y2 JPH0451392 Y2 JP H0451392Y2 JP 9406388 U JP9406388 U JP 9406388U JP 9406388 U JP9406388 U JP 9406388U JP H0451392 Y2 JPH0451392 Y2 JP H0451392Y2
- Authority
- JP
- Japan
- Prior art keywords
- key top
- block
- cap
- shaped base
- guide hole
- 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
- 239000002184 metal Substances 0.000 claims description 10
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、内部に接点ばねを有する押ボタンダ
イヤルにおけるキートツプの組込構造に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for incorporating a key top in a push button dial having a contact spring inside.
従来、公衆電話機用押ボタンダイヤル、特にプ
ツシユ回線用の押ボタンダイヤルは、特実公昭57
−28449号公報等に見られるように、内部に共通
スイツチ、接点ばね、共通スイツチ駆動用クラン
ク等を有し、キートツプの押下操作によりクラン
クを介して共通スイツチを間接に動作させるよう
に構成されたものが知られている。そして、その
キートツプは、通常合成樹脂によつてブロツク状
に形成され、第４図に示すように、ブロツク体の
案内孔に出没自在に挿入されている。すなわち、
１はキートツプ、２は合成樹脂からなるブロツク
体、３はキートツプ１が出没自在に挿通される案
内孔、４はキートツプ１の下端部周面に突設され
た抜け防止用鍔部、５はプリント基板、６はラバ
ースイツチで、このラバースイツチ６は、ゴムシ
ート７に設けられたドーム状弾性部８と、ドーム
状弾性部８の内面に設けられた可動接点９と、プ
リント基板５上に前記可動接点９に対応して設け
られた固定接点１０とからなり、キートツプ１の
押下操作により、可動接点９が固定接点１０に圧
接されるように構成されている。１１は共通スイ
ツチ駆動用クランクで、このクランク１１は不図
示の接点ばねにより矢印方向の回動習性を付与さ
れ、その先端がキートツプ１の下端部に一体に突
設させた突片１２に下方より当接係合しており、
キートツプ１の押下操作により接点ばねに抗して
時計方向に回動されると、共通スイツチ（図示せ
ず）を動作させるように構成されている。
Conventionally, push-button dials for public telephones, especially push-button dials for push-button lines, were developed in 1986.
As seen in Publication No. 28449, etc., it has a common switch, a contact spring, a crank for driving the common switch, etc., and is configured to indirectly operate the common switch via the crank by pressing the key top. something is known. The key top is usually formed in the shape of a block from synthetic resin, and is inserted into a guide hole of the block body so as to be freely retractable. That is,
1 is a key top, 2 is a block body made of synthetic resin, 3 is a guide hole through which the key top 1 is inserted so as to be freely retractable, 4 is a flange protruding from the circumferential surface of the lower end of the key top 1 to prevent it from coming off, and 5 is a print. The substrate 6 is a rubber switch, and the rubber switch 6 includes a dome-shaped elastic portion 8 provided on a rubber sheet 7, a movable contact 9 provided on the inner surface of the dome-shaped elastic portion 8, and a rubber switch 6 on the printed circuit board 5. It consists of a fixed contact 10 provided corresponding to a movable contact 9, and is configured such that when the key top 1 is pressed, the movable contact 9 is brought into pressure contact with the fixed contact 10. Reference numeral 11 denotes a common switch drive crank, and this crank 11 is given the ability to rotate in the direction of the arrow by a contact spring (not shown), and the tip of the crank 11 is attached to a protruding piece 12 integrally provided at the lower end of the key top 1 from below. are abuttingly engaged,
When the key top 1 is pressed down and rotated clockwise against a contact spring, a common switch (not shown) is operated.
ところで、この種のキートツプ１は耐久性の向
上、たばこの押当等による悪戯防止の対策上、合
成樹脂の代りに金属化が検討されている。その場
合、一般的には樹脂間の摺動摩擦に比べて樹脂と
金属間の摺動摩擦の方が小さいにも拘わらず、樹
脂製キートツプを金属製キートツプに置換した場
合には、キートツプの引掛かりが発生し、操作性
を低下させることが判明した。
By the way, for this type of key top 1, metalization is being considered instead of synthetic resin in order to improve durability and prevent mischief caused by pressing a cigarette or the like. In that case, although the sliding friction between resin and metal is generally smaller than the sliding friction between resin, if the resin key top is replaced with a metal key top, the key top will not get caught. It has been found that this problem occurs and reduces operability.
すなわち、接点ばねを内蔵した上述のプツシユ
回線用押ボタンダイヤルにおいては、接点ばねに
よるクランク１１の回動習性によりキートツプ１
が第４図に示すように傾き、突片１２側とは反対
側の側面１４が案内孔３の内面に片当りするた
め、これが押下時の摺動摩擦となり、キートツプ
１を金属化するとこの摺動摩擦が一層大きくな
り、キートツプ１の引掛かりとなるものである。
更に、キートツプ１の復旧時においても同様に接
点ばねの反力を受けるため、摩擦力が増大する。 In other words, in the above-mentioned pushbutton dial for a pushbutton line with a built-in contact spring, the key top 1 is
is tilted as shown in FIG. 4, and the side surface 14 on the opposite side to the protruding piece 12 makes partial contact with the inner surface of the guide hole 3, so this becomes sliding friction when pressed down, and when the key top 1 is made of metal, this sliding friction is reduced. becomes even larger and becomes a catch for key top 1.
Furthermore, when the key top 1 is restored, it is similarly subjected to the reaction force of the contact spring, so that the frictional force increases.
したがつて、本考案は上述したような問題点を
解決し、簡単な構成でキートツプを一部分のみ金
属化することにより、耐久性の向上と悪戯を防止
でき、しかも押下操作時における樹脂と金属との
接触を避けキートツプの引掛かり現象を未然に防
止し得るようにした押ボタンダイヤルにおけるキ
ートツプの組込構造を提供することを目的とする
ものである。 Therefore, the present invention solves the above-mentioned problems and makes it possible to improve durability and prevent tampering by metalizing only a portion of the key top with a simple structure, and moreover, it is possible to improve the durability and prevent tampering between the resin and metal during pressing operation. The object of the present invention is to provide a structure for incorporating a key top in a push button dial, which is capable of preventing the key top from coming into contact with the key top and preventing the key top from getting caught.
本考案は上記目的を達成するために、ブロツク
体の案内孔に出没自在に収納され通常上端部が外
部に突出する合成樹脂製のブロツク状基台部と、
カツプ状に形成されて上面に数字、記号等の表示
部が打抜き形成され前記ブロツク状基台部の上端
部を被う金属製のキヤツプとをインサート成形に
よつて一体に形成し、前記ブロツク体の表面から
前記キヤツプまでの距離をキートツプの最大スト
ロークと略等しいそれ以上に設定したものであ
る。
In order to achieve the above object, the present invention includes a block-shaped base made of synthetic resin that is housed in a guide hole of a block body so as to be freely retractable and whose upper end usually protrudes to the outside.
A metal cap, which is formed into a cup shape and has display parts such as numbers and symbols stamped on the upper surface and which covers the upper end of the block-shaped base part, is integrally formed by insert molding, and the block body The distance from the surface of the cap to the cap is set to be approximately equal to or greater than the maximum stroke of the key top.
本考案においてキヤツプは、ブロツク体の表面
までの距離をキートツプの最大ストロークと略等
しいそれ以上に設定されているので、押下操作時
にブロツク体の案内孔内周面に接触しない。
In the present invention, the distance of the cap to the surface of the block body is set to be approximately equal to or greater than the maximum stroke of the key top, so that it does not come into contact with the inner circumferential surface of the guide hole of the block body during a pressing operation.
以下、本考案を図面に示す実施例に基づいて詳
細に説明する。
Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第１図は本考案に係るキートツプの組込構造を
示す断面図、第２図は押ボタンダイヤルの外観斜
視図、第３図はキヤツプの斜視図である。なお、
図中第４図と同一構成部品、部分に対しては同一
符号を以手示し、その説明を省略する。これらの
図においては、ブロツク体２は合成樹脂によつて
一体に形成され、上面に横３列，縦４列，合計12
個の案内孔３がマトリクス状に形成されており、
その夫々に所定の数字もしくは記号を表示された
キートツプ１が出没自在に挿入配置され、通常そ
の上端部が外部に突出している。 FIG. 1 is a cross-sectional view showing a key top assembly structure according to the present invention, FIG. 2 is an external perspective view of a push button dial, and FIG. 3 is a perspective view of a cap. In addition,
Components and portions in the figure that are the same as those in FIG. 4 are designated by the same reference numerals, and their explanations will be omitted. In these figures, the block body 2 is integrally formed of synthetic resin, and has 3 horizontal rows and 4 vertical rows on the top surface, a total of 12
guide holes 3 are formed in a matrix,
A key top 1 on which a predetermined number or symbol is displayed is inserted into and retracted from the key top 1, and the upper end of the key top usually protrudes to the outside.
各キートツプ１は、前記案内孔３に摺動自在に
嵌合し得る合成樹脂製のブロツク状基台部２０
と、カツプ状に形成されて上面中央に数字、記号
等の表示部２１が打抜き形成され前記ブロツク状
基台部２０の上端部を被う金属製のキヤツプ２２
の２部材で構成され、これらはインサート成形に
より一体に形成されている。ブロツク状基台部２
０は抜け防止用鍔部４と共通スイツチ用の突片１
２を一体に有している。キヤツプ２２の表示部２
１は、前述した通りプレス等により打抜き形成さ
れているため、穴を構成し、この穴に前記ブロツ
ク状基台部２０の一部が露呈して所定の数字もし
くは記号、例えば「０」を表示している。この場
合、「０」は第３図に示すように環状穴２４の内
側に離島部２５を有し、この離島部２５とキヤツ
プ本体とを連結アーム２６によつて連結してい
る。なお、連結アーム２６はキヤツプ２２の内面
側に設けられ、インサート成形されると、樹脂に
よつて被われ外部から視認されることはない。 Each key top 1 has a block-shaped base portion 20 made of synthetic resin that can be slidably fitted into the guide hole 3.
and a metal cap 22 which is formed into a cup shape and has a display part 21 such as numbers and symbols stamped in the center of the upper surface and which covers the upper end of the block-shaped base part 20.
It is composed of two members, which are integrally formed by insert molding. Block-shaped base part 2
0 is the detachment prevention collar 4 and the common switch protrusion 1
It has 2 integrally. Display section 2 of cap 22
1 is formed by punching with a press or the like as described above, so that it forms a hole, and a part of the block-shaped base part 20 is exposed in this hole to display a predetermined number or symbol, for example, "0". are doing. In this case, "0" has a remote island portion 25 inside the annular hole 24, as shown in FIG. 3, and this remote island portion 25 and the cap body are connected by a connecting arm 26. The connecting arm 26 is provided on the inner surface of the cap 22, and when it is insert-molded, it is covered with resin and is not visible from the outside.
前記キヤツプ２２は、案内孔から完全に外部に
突出しており、ブロツク体２の上面から該キヤツ
プ２２までの距離L1は、キートツプ１の最大ス
トロークL2と略等しいかこれにより大きく設定
（L1≧L2）されている。 The cap 22 completely projects outside from the guide hole, and the distance L 1 from the top surface of the block body 2 to the cap 22 is approximately equal to or larger than the maximum stroke L 2 of the key top 1 (L 1 ≧L 2 ).
かくしてこのような構成からなるキートツプ１
の粗込構造によれば、キートツプ１を押下操作し
てもL1≧L2の関係によりキヤツプ２２は案内孔
３内に没入することがないので、樹脂と金属の摺
動が起らず、キートツプ１の引掛かり現象を防止
し得る、良好な操作性を得ることができる。しか
も、キートツプ１の操作部は金属製キヤツプ２２
によつて被われているので、耐久性に優れ、また
たばこの押付け等の悪戯にも十分耐え得るもので
ある。 Thus, key top 1 consisting of this structure
According to the coarse-grained structure, even if the key top 1 is pressed down, the cap 22 will not sink into the guide hole 3 due to the relationship L 1 ≧ L 2 , so no sliding will occur between the resin and the metal. It is possible to prevent the key top 1 from getting stuck and to obtain good operability. Moreover, the operation part of the key top 1 is a metal cap 22.
Since it is covered with a thick layer, it has excellent durability and can withstand mischief such as being pushed with a cigarette.
以上説明したように本考案に係る押ボタンダイ
ヤルにおけるキートツプの組込構造によれば、ブ
ロツク体の案内孔から突出する先端部のみを金属
製キヤツプで被い、押下操作時に該キヤツプが案
内孔の内周壁に接触しないように構成しているの
で、押下操作時にキートツプの引掛かり現象が生
じず、良好な操作性を得ることができ、またキヤ
ツプはキートツプの耐久性を向上させると共に悪
戯による損傷等を防止し、金属化の要請に十分応
え得るなど、その実用上の効果は大である。
As explained above, according to the built-in structure of the key top in the push button dial according to the present invention, only the tip protruding from the guide hole of the block body is covered with a metal cap, and the cap is inserted into the guide hole when the key is pressed. Since the cap is configured so that it does not come into contact with the inner circumferential wall, the key top does not get caught when pressed, providing good operability.The cap also improves the durability of the key top and prevents damage caused by mischief. It has great practical effects, such as preventing metallization and fully meeting the demands of metallization.
第１図は本考案に係るキートツプの組込構造の
一実施例を示す断面図、第２図は押ボタンダイヤ
ルの外観斜視図、第３図はキヤツプの外観斜視
図、第４図は従来のキートツプの組込構造を示す
断面図である。
１……キートツプ、２……ブロツク体、３……
案内孔、５……プリント基板、２０……ブロツク
状基台部、２１……表示部、２２……キヤツプ。
Fig. 1 is a sectional view showing an embodiment of the key top built-in structure according to the present invention, Fig. 2 is an external perspective view of a push button dial, Fig. 3 is an external perspective view of the cap, and Fig. 4 is a conventional key top construction. FIG. 3 is a cross-sectional view showing a key top assembly structure. 1...Keytop, 2...Block letters, 3...
Guide hole, 5... printed circuit board, 20... block-shaped base section, 21... display section, 22... cap.
Claims (1)
ートツプにおいて、ブロツク体の案内孔に出没自
在に収納され通常上端部が外部に突出する合成樹
脂製のブロツク状基台部と、カツプ状に形成され
て上面に数字、記号等の表示部が打抜き形成され
前記ブロツク状基台部の上端部を被う金属製のキ
ヤツプとをインサート成形によつて一体に形成
し、前記ブロツク体の表面から前記キヤツプまで
の距離をキートツプの最大ストロークと略等しい
かそれ以上に設定したことを特徴とする押ボタン
ダイヤルにおけるキートツプの組込構造。 The key top of a pushbutton dial that has a contact spring inside has a block-shaped base made of synthetic resin that is retractably housed in a guide hole of the block body and whose upper end usually protrudes to the outside, and a cup-shaped upper surface. A metal cap covering the upper end of the block-shaped base is formed by punching out display parts such as numbers and symbols, and is integrally formed by insert molding. A built-in structure for a key top in a push button dial, characterized in that the distance is set approximately equal to or greater than the maximum stroke of the key top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9406388U JPH0451392Y2 (en) | 1988-07-18 | 1988-07-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9406388U JPH0451392Y2 (en) | 1988-07-18 | 1988-07-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0216531U JPH0216531U (en) | 1990-02-02 |
| JPH0451392Y2 true JPH0451392Y2 (en) | 1992-12-03 |
Family
ID=31318558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9406388U Expired JPH0451392Y2 (en) | 1988-07-18 | 1988-07-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451392Y2 (en) |
-
1988
- 1988-07-18 JP JP9406388U patent/JPH0451392Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0216531U (en) | 1990-02-02 |
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