JPS643137Y2

JPS643137Y2 -

Info

Publication number: JPS643137Y2
Application number: JP18086482U
Authority: JP
Priority date: 1982-11-30
Filing date: 1982-11-30
Publication date: 1989-01-26
Also published as: JPS5984727U

Description

【考案の詳細な説明】この考案は封入形リミツトスイツチの改良に関
する。[Detailed Description of the Invention] This invention relates to an improvement to an enclosed limit switch.

従来この種の封入形リミツトスイツチは第１図
に示すようにケース１の底壁４に外部端子６，６
を一体に成形するとともにこれらの外部端子上に
形成された穴１０，１０に円すい状のコイルスプ
リング１５の下端を収容し、かつその上端をケー
ス１内に収容したスイツチ１１の端子１３を挿入
させ、これによつて端子１３と外部端子６とをた
がいに電気的に接続し、さらにピン１４によりス
イツチ１１をケース１に対して固定しているが、
円すい状のコイルスプリング１５は穴１０内に単
に収容されているだけであるためそのスプリング
と外部端子６との接触信頼性が低く、また外部端
子６はケース１に対してモールドにより同時成形
しているため穴１０内において外部端子６の先端
にケース１のモールドがかぶり、これがさらに接
触信頼性を低下させる原因になつていた。さらに
ケース１は第２図に示すように箱形で、しかもそ
の開口部３の幅が狭いため、スイツチ１１をケー
ス１内に収容する際、スプリング１５の下端が見
え難く、したがつてスプリング１５の下端を穴１
０内に確実に収容することがむずかしく、スプリ
ング１５が倒れ易い欠点がある。しかもスプリン
グ１５は円すい状のものを用いるため高価であ
り、いきおい製品の原価高を招くおそれがあつ
た。 Conventionally, this type of enclosed limit switch has external terminals 6, 6 on the bottom wall 4 of the case 1, as shown in FIG.
are integrally molded, and the lower end of the conical coil spring 15 is accommodated in the holes 10, 10 formed on these external terminals, and the terminal 13 of the switch 11, whose upper end is accommodated in the case 1, is inserted. This electrically connects the terminal 13 and the external terminal 6 to each other, and furthermore, the pin 14 fixes the switch 11 to the case 1.
Since the conical coil spring 15 is simply accommodated in the hole 10, the contact reliability between the spring and the external terminal 6 is low, and the external terminal 6 is molded into the case 1 at the same time. As a result, the mold of the case 1 covers the tip of the external terminal 6 in the hole 10, which further deteriorates the contact reliability. Furthermore, the case 1 is box-shaped as shown in FIG. 2, and the width of the opening 3 is narrow. hole 1
It is difficult to reliably accommodate the spring 15 in the zero position, and the spring 15 has the disadvantage that it tends to fall. Moreover, since the spring 15 is conical, it is expensive, which may lead to an increase in the cost of the product.

この考案はこのような従来の欠点を解消しよう
とするもので、以下図によつてこの考案の一実施
例について説明する。 This invention is intended to eliminate such conventional drawbacks, and one embodiment of this invention will be described below with reference to the drawings.

すなわち第３図および第４図においてケース１
は薄い箱形に形成され、１つの面すなわち広い面
積を有する側面に開口部２が形成され、かつその
側面と隣接する上面にも開口部３が形成されてい
る。またケース１の底壁４には孔５，５が設けら
れ、この孔に外部端子６，６が貫挿される。この
外部端子は一端すなわち上端部に係合溝７を有
し、かつ他端すなわち下端部には６角形の回り止
め８が設けられ、さらにこの下端には端子ねじ９
が螺合されている。そしてこれらの外部端子は孔
５にケース１の外方から挿入することによりその
係合溝７がケース１内に突出するようにされてい
る。さらにケース１内にはスイツチ１１が開口部
２を通して収容され、その頂部にはプランジヤー
１２が、またその下端には端子１３，１３がそれ
ぞれ突設されている。 In other words, case 1 in Figures 3 and 4
is formed into a thin box shape, with an opening 2 formed on one side, that is, a side having a large area, and an opening 3 also formed on the upper surface adjacent to the side. Further, holes 5, 5 are provided in the bottom wall 4 of the case 1, and external terminals 6, 6 are inserted through these holes. This external terminal has an engagement groove 7 at one end, that is, the upper end, and a hexagonal detent 8 at the other end, that is, the lower end, and a terminal screw 9 at the lower end.
are screwed together. These external terminals are inserted into the holes 5 from the outside of the case 1 so that their engagement grooves 7 protrude into the case 1. Further, a switch 11 is housed in the case 1 through an opening 2, and a plunger 12 is provided at the top of the switch 11, and terminals 13, 13 are provided protruding from the bottom end of the switch 11, respectively.

一方連結子１５は弾性を有する導電性の板状体
を折曲げることによりコ字状に形成されている。
そしてこの連結子は端子１３と係合する切欠き部
１９を有する第１の係合部１６と、外部端子６の
係合溝７と係合する切欠き部２０を有する第２の
係合部１７およびこれら第１，第２の係合部１
６，１７をたがいに連結する連結部１８から構成
されている。 On the other hand, the connector 15 is formed into a U-shape by bending an elastic, conductive plate-like body.
This connector includes a first engaging portion 16 having a notch 19 that engages with the terminal 13, and a second engaging portion having a notch 20 that engages with the engaging groove 7 of the external terminal 6. 17 and these first and second engaging parts 1
6 and 17 are connected to each other.

またケース１には開口部２を覆うカバー２１が
取付けられる。 Further, a cover 21 that covers the opening 2 is attached to the case 1.

上記構成における封入形リミツトスイツチは次
のように組立てられる。 The enclosed limit switch having the above structure is assembled as follows.

まずスイツチ１１をケース１内に開口部２を通
して収容し、外部端子６，６を孔５，５に貫挿す
る。この状態で連結子１５の第１の係合部１６を
スイツチ１１の端子１３に、また第２の係合部１
７を外部端子６の係合溝７にそれぞれ係合する。
これによつて端子１３と外部端子６とはたがいに
機械的に、かつ電気的に連結される。なおこの状
態で外部端子６は回り止め８によりケース１に対
して回動するのを防止させる。次にカバー２１を
ケース１に取付けることにより開口部２が覆わ
れ、組立てが完了する。 First, the switch 11 is housed in the case 1 through the opening 2, and the external terminals 6, 6 are inserted into the holes 5, 5. In this state, connect the first engaging portion 16 of the connector 15 to the terminal 13 of the switch 11, and connect the second engaging portion 16 of the connector 15 to the terminal 13 of the switch 11.
7 are respectively engaged with the engagement grooves 7 of the external terminals 6.
Thereby, the terminal 13 and the external terminal 6 are mechanically and electrically connected to each other. In this state, the external terminal 6 is prevented from rotating relative to the case 1 by the rotation stopper 8. Next, the opening 2 is covered by attaching the cover 21 to the case 1, and the assembly is completed.

この考案は上述のように箱状のケース１の広い
面積を有する１つの面に開口部２を設け、この開
口部を通してケース１内にスイツチ１１を収容す
るようにしているので、その収容作業が容易であ
り、また外部端子６はケース１の底壁４にこの下
方より貫挿してその一端をケース１内に突出さ
せ、さらにケース１内においてスイツチ１１の端
子１３と外部端子６との間に連結子１５を設け、
この連結子の第１の係合部１６に端子１３と係合
する切欠き部１９を、またその第２の係合部１７
には外部端子６に設けた係合溝７と係合する切欠
き部２０を設けているので、連結子１５の端子１
３および外部端子６に対し、開口部２側から容易
に係合することができ、したがつてスイツチ１１
をケース１に対して組付けた後に連結子１５を取
付けることができ、しかも特殊な工具を必要とし
ないのでその取付け作業が単純であるばかりかス
イツチ１１の端子１３と外部端子６との連結状態
を確認することができるのでそれらの接続が確実
で、したがつて端子１３と連結子１５および外部
端子６との間の接触信頼性が向上する。また連結
子１５は１枚の板状体を折曲げることにより構成
されるため、円すい状のコイルスプリングに比し
安価に供給でき、したがつて製品の原価を低減す
ることができる利点がある。 As mentioned above, in this invention, an opening 2 is provided on one surface having a large area of the box-shaped case 1, and the switch 11 is housed in the case 1 through this opening, so that the work of housing the switch 11 is facilitated. In addition, the external terminal 6 is inserted into the bottom wall 4 of the case 1 from below so that one end thereof protrudes into the case 1, and the external terminal 6 is inserted between the terminal 13 of the switch 11 and the external terminal 6 within the case 1. A connector 15 is provided,
A notch 19 that engages with the terminal 13 is provided in the first engaging portion 16 of the connector, and a notch 19 that engages with the terminal 13 is provided in the first engaging portion 16 of the connector.
is provided with a notch 20 that engages with the engagement groove 7 provided in the external terminal 6, so that the terminal 1 of the connector 15
3 and the external terminal 6 from the opening 2 side, and therefore the switch 11
The connector 15 can be attached after the switch is assembled to the case 1, and no special tools are required, which not only simplifies the installation process but also improves the connection between the terminal 13 of the switch 11 and the external terminal 6. can be confirmed, the connections are reliable, and the reliability of contact between the terminals 13, connectors 15, and external terminals 6 is improved. Further, since the connector 15 is constructed by bending a single plate-shaped body, it can be supplied at a lower cost than a conical coil spring, and therefore has the advantage of being able to reduce the cost of the product.

[Brief explanation of the drawing]

第１図は従来の封入形リミツトスイツチの縦断
面図、第２図はケースの斜視図、第３図はこの考
案における封入形リミツトスイツチの縦断面図、
第４図は第３図の４−４線に沿つて切断し、これ
を矢印方向に見た断面図、第５図は分解斜視図で
ある。１……ケース、２……開口部、３……開口部、
４……底壁、５……孔、６……外部端子、７……
係合溝、８……回り止め、９……端子ねじ、１１
……スイツチ、１２……プランジャー、１３……
端子、１５……連結子、１６……第１の係合部、
１７……第２の係合部、１８……連結部、１６…
…切欠き部、２０……切欠き部、２１……カバ
ー。 Fig. 1 is a longitudinal sectional view of a conventional enclosed limit switch, Fig. 2 is a perspective view of the case, and Fig. 3 is a longitudinal sectional view of the enclosed limit switch according to this invention.
FIG. 4 is a sectional view taken along line 4--4 in FIG. 3 and viewed in the direction of the arrow, and FIG. 5 is an exploded perspective view. 1... Case, 2... Opening, 3... Opening,
4... Bottom wall, 5... Hole, 6... External terminal, 7...
Engagement groove, 8... Detent, 9... Terminal screw, 11
...Switch, 12...Plunger, 13...
terminal, 15...connector, 16...first engagement part,
17... second engaging part, 18... connecting part, 16...
...Notch part, 20... Notch part, 21... Cover.

Claims

[Scope of utility model registration request]

An opening 2 is provided in one surface having a large area of a box-shaped case 1, and a switch 11 is accommodated in the case 1 through the opening 2, and an external terminal is connected to the bottom wall 4 of the case 1 from below. 6 and one end thereof protrudes into the case 1,
Further, in the case 1, the switch 11
between the terminal 13 and the external terminal 6, a first engaging part 16 formed by bending a plate-shaped body and consisting of a notch 19 that engages with the terminal 13, and the external terminal 6. A connector 15 is provided, which has a second engaging part 17 consisting of a notch 20 that engages with the provided engaging groove 7, and a connecting part 18 that connects both these engaging parts to each other, and the opening 2 is covered with a cover 21.