JPS634350Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案はスイツチ装置に関し、その目的とする
ところは特にリーフスイツチにおいて、スイツチ
接片間の接触（接点）圧、換言すればスイツチ接
片のばね圧を充分高くとれるようにして、接片同
志の接触不良をなくすことにある。[Detailed Description of the Invention] The present invention relates to a switch device, and its purpose is to maintain a sufficiently high contact (contact) pressure between the switch contacts, in other words, the spring pressure of the switch contacts, especially in leaf switches. The purpose is to eliminate poor contact between the contact pieces.

従来のスイツチ装置は第１図、第２図に示すリ
ーフスイツチを例に採れば先端に互に相対するよ
うに接点１ａ，２ａを設けた２つのスイツチ接片
１，２をほぼ平行に配置しそれらの後端を合成樹
脂製の基台３で保持して構成されている。このス
イツチを、基台３の取付け孔３ａにビスを挿入し
て固定基板に固定し、上記２つのスイツチ接片
１，２を間に挟むように作動部材４ａ，４ｂを配
置して、これらの作動部材４ａ，４ｂを一体に図
の上、下方向に動かせると、スイツチ接片１，２
は第３図、第４図のように変位してスイツチがオ
フ状態からオン状態になる。 Taking the leaf switch shown in FIGS. 1 and 2 as an example, a conventional switch device has two switch contact pieces 1 and 2 arranged almost parallel to each other and have contact points 1a and 2a facing each other at their tips. Their rear ends are held by a base 3 made of synthetic resin. This switch is fixed to a fixed board by inserting a screw into the mounting hole 3a of the base 3, and the operating members 4a and 4b are arranged so as to sandwich the two switch contact pieces 1 and 2 between them. If the actuating members 4a and 4b can be moved together upwards and downwards in the figure, the switch contacts 1 and 2
is displaced as shown in FIGS. 3 and 4, and the switch changes from the OFF state to the ON state.

しかしながら、この種のスイツチ装置によれば
次のような問題が発生する。すなわち、スイツチ
接片１，２の根元から接点１ａ，２ａまでの長さ
l₁を、作動部材４ａ，４ｂ移動時のスイツチ接片
２又は１の移動量l₂に比べて充分大きくとつてお
かなければ、スイツチ接片１，２を撓ませたと
き、それらの根元すなわち基台３との接続部に加
わる曲げ応力が大きくなり、スイツチのオン、オ
フを繰り返し行なつているうちに疲労現象によつ
てスイツチ接片１，２がその根元部で折れてしま
うことがあるので、上記l₁はl₂に比べて充分長く
とられている。このようにすると、スイツチ接片
１，２の長さl₁が基部３長さに比べても長くなる
ため、スイツチ接片１，２に反り等が発生し、接
点１ａ，２ａの位置が不安定となつてしまうこと
から、スイツチとしてのオン、オフ特性にばらつ
きが生じ、安定した特性のスイツチを得ることが
難かしいという問題が生じるものであつた。 However, this type of switch device causes the following problems. In other words, the length from the roots of switch contacts 1 and 2 to contacts 1a and 2a
If l ₁ is not made sufficiently larger than the amount of movement l 2 of the switch contact pieces 2 or ₁ when the actuating members 4a, 4b are moved, when the switch contact pieces 1, 2 are bent, their roots or The bending stress applied to the connection with the base 3 increases, and as the switch is repeatedly turned on and off, the switch contacts 1 and 2 may break at their bases due to fatigue. Therefore, l ₁ is sufficiently longer than l ₂ . If this is done, the length _l1 of the switch contacts 1 and 2 will be longer than the length of the base 3, which will cause the switch contacts 1 and 2 to warp, resulting in incorrect positions of the contacts 1a and 2a. As a result, the on/off characteristics of the switch vary, creating the problem that it is difficult to obtain a switch with stable characteristics.

また図面からも明らかなように、スイツチ接片
１，２が撓まされたとき、その接点１ａ，２ａ間
の接触圧いわゆる接点圧は接片１，２が一定量撓
んで初めて発生するものである。そして上記接点
圧はスイツチ接片１又は２の撓み量l₃に比例して
発生するが、このl₃は先のl₂に比べて接点１ａ，
２ａの間距離ｂだけ短かい。この接点間距離ｂは
ある程度の長さが必要となるから、その分だけ接
点圧は小さくなり、接触不良を発生させる一要因
となる。上記接点圧は通常５グラム〜50グラム程
度であるが、接触をくり返すうちに接点表面に形
成される酸化皮膜、硫化皮膜やほこり等を取り除
くためには充分に高い圧力が望まれる。 Also, as is clear from the drawing, when the switch contacts 1 and 2 are bent, the contact pressure between the contacts 1a and 2a, so-called contact pressure, is generated only when the contact pieces 1 and 2 are bent by a certain amount. be. The above contact pressure is generated in proportion to the amount of deflection _l3 of the switch contact piece 1 or 2, but this _l3 is larger than the previous _l2 at the contact point 1a,
The distance b between 2a is shorter. Since this inter-contact distance b needs to be a certain length, the contact pressure decreases by that amount, which is one of the causes of contact failure. The contact pressure is usually about 5 to 50 grams, but a sufficiently high pressure is desired to remove oxide films, sulfide films, dust, etc. that are formed on the contact surfaces during repeated contact.

特に最近、機器の小型化が進められており、し
たがつて機器内のスペースに制約があることから
スイツチ装置としても、小型で充分な接点圧がと
れ、繰り返し使用によつてスイツチ接片が折れて
しまうことのないものが要求されている。 In particular, recently, devices have become smaller and space within the device is limited, so it is important to use a switch device that is small enough to provide sufficient contact pressure, and the switch contact piece will not break with repeated use. What is required is something that will never be lost.

本考案はこのような要求を満足するものであ
り、以下にその一実施例について第５図以降の図
面と共に説明する。これらの図面中、第１図〜第
４図と同一構成部分には同一番号を付して詳細な
説明を省略するが、異なる点は図からも明らかな
ように、合成樹脂製基台３に一体に、スイツチ接
片１，２各々の外側面に接触する突出部５，６を
設けたことにある。このような構成であるから、
作動部材４ａ，４ｂが第７図、第８図のように移
動して、スイツチ接片１，２を撓ませたとき、作
動部材４ｂ又は４ａが当接されるスイツチ接片２
又は１は従来と同様に撓ませられるが、この撓ま
せられたスイツチ接片２又は１に押されて撓ませ
られるスイツチ接片１又は２はその根元部分が上
記突出部５又は６に圧接されて撓ませられる。す
なわち作動部材によつて直接作用を受ける一方の
スイツチ接片はl₁の長さ分で撓み、接点圧を出す
ため他方のスイツチ接片はl₁から突出部５，６の
高さを差引いたl₄の長さ分で撓む。 The present invention satisfies these requirements, and one embodiment thereof will be described below with reference to the drawings from FIG. 5 onwards. In these drawings, the same components as in FIGS. 1 to 4 are given the same numbers and detailed explanations are omitted, but as is clear from the drawings, the differences are that the synthetic resin base 3 is The switch contact pieces 1 and 2 are integrally provided with protrusions 5 and 6 that come into contact with their outer surfaces. Because of this configuration,
When the actuating members 4a, 4b move as shown in FIGS. 7 and 8 and bend the switch contact pieces 1, 2, the switch contact pieces 2 are brought into contact with the actuating members 4b or 4a.
Alternatively, the switch contact piece 1 or 1 is bent in the same manner as in the conventional case, but the switch contact piece 1 or 2 that is pushed and bent by the bent switch contact piece 2 or 1 has its base portion pressed against the protrusion 5 or 6. It is made to bend. In other words, one switch contact piece that is directly acted on by the actuating member is deflected by a length of l ₁ , and in order to generate a contact pressure, the other switch contact piece is bent by a length of l ₁ minus the height of the protrusions 5 and 6. Deflects by a length of l ₄ .

したがつて作動部材４ａ，４ｂの移動量が常に
一定であるとすれば、従来における接点圧よりも
高い接点圧を本実施例で得ることができる。たと
えば第７図において、スイツチ接片１に加えられ
る応力を、スイツチ接片２に加えられる応力とほ
ぼ等しくするようにl₄を決定することができるた
め、従来と同じ作動部材移動量とすれば高いスイ
ツチ接点圧が得られ、この接点圧を従来と同じに
するなら作動部材移動量を小さくすることができ
る。なお上記実施例ではスイツチ接片が２つのス
イツチについて説明をしたが、スイツチ接片が３
つ以上のものについても同様に適用できるもので
ある。要は１つのスイツチ回路を構成する２つの
スイツチ接片のうち、一方の接片を、他方の接片
に接触させるように撓ませたとき、他方の接片の
根元部分が突出部に圧接されて撓ませられるよう
に構成すればよい。 Therefore, if the amount of movement of the operating members 4a, 4b is always constant, a contact pressure higher than that of the conventional one can be obtained in this embodiment. For example, in Fig. 7, _l4 can be determined so that the stress applied to switch contact 1 is approximately equal to the stress applied to switch contact 2, so that if the amount of movement of the operating members is the same as in the conventional one, a high switch contact pressure can be obtained, and if this contact pressure is made the same as in the conventional one, the amount of movement of the operating members can be made smaller. Incidentally, in the above embodiment, a switch with two switch contacts has been described, but a switch with three switch contacts can also be used.
The above can also be applied to the above. In short, it is sufficient that when one of the two switch contacts constituting one switch circuit is bent so as to come into contact with the other contact, the base portion of the other contact is pressed against the protruding portion and bent.

以上説明したように本考案のスイツチ装置によ
れば、基台に突出部を設けて、これにスイツチ接
片を接触させて撓ませるようにするという至つて
簡単な構成で、充分高い接点圧を持ち、確実にオ
ン、オフを行なうスイツチ装置を安価に提供する
ことができる。また、基台に設けた突出部は２本
のスイツチ接片の根元外側にそれぞれ接触するた
め、往復動する作動部材にて２本のスイツチ接片
を可動側および固定側交互に使用するスイツチ装
置において、一方のスイツチ接片は大きく撓まさ
れ、他方のスイツチ接片は小さく撓まされ、この
小さく撓まされる他方のスイツチ接片の外側根元
に突出部が接触することにより、曲げ応力の繰り
返しに起因した疲労現象も極力小さく抑えること
ができる。 As explained above, the switch device of the present invention has a very simple structure in which a protrusion is provided on the base, and the switch contact piece is brought into contact with the protrusion and flexed, and a sufficiently high contact pressure can be achieved. To provide a switch device that can be held and reliably turns on and off at a low cost. In addition, since the protrusion provided on the base contacts the outside of the base of the two switch contacts, the switch device uses the two switch contacts alternately on the movable side and the fixed side with the reciprocating actuating member. In this process, one switch contact piece is greatly bent, and the other switch contact piece is slightly bent, and the protrusion comes into contact with the outer root of the other switch contact piece, which is slightly bent, to prevent repeated bending stress. Fatigue phenomena caused by this can also be kept to a minimum.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のスイツチ装置の平面図、第２図
は同側面図、第３図、第４図は同装置の動作を説
明する平面図、第５図は本考案の一実施例におけ
るスイツチ装置の平面図、第６図は同側面図、第
７図、第８図は同装置の動作を説明する平面図で
ある。 １，２……スイツチ接片、３……基台、４ａ，
４ｂ……作動部材、５，６……突出部。 Fig. 1 is a plan view of a conventional switch device, Fig. 2 is a side view of the same, Figs. 3 and 4 are plan views explaining the operation of the device, and Fig. 5 is a plan view of a conventional switch device. FIG. 6 is a plan view of the device, FIG. 6 is a side view thereof, and FIGS. 7 and 8 are plan views illustrating the operation of the device. 1, 2...Switch contact piece, 3...Base, 4a,
4b... Operating member, 5, 6... Protruding portion.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ２本のスイツチ接片をほぼ平行に配配してそれ
らの一端を基台で保持し、かつ上記２本のスイツ
チ接片の外側から作動部材を往復動させ、スイツ
チ接片を可動側および固定側交互に使用するよう
にしたスイツチ装置において、上記基台に２本の
スイツチ接片の外側根元にそれぞれ接触する突出
部を設け、１つのスイツチ回路を構成する２つの
スイツチ接片のうち、一方の接片を他方の接片を
他方の接片に接触させるように撓ませたとき、該
他方の接片の根元部分が上記突出部に圧接されて
撓ませられるように構成したことを特徴とするス
イツチ装置。 Two switch contacts are arranged almost in parallel, one end of which is held by a base, and an actuating member is reciprocated from the outside of the two switch contacts, so that the switch contact pieces are arranged on the movable side and on the fixed side. In a switch device that is used alternately, the base is provided with protrusions that contact the outer bases of the two switch contacts, and one of the two switch contacts constituting one switch circuit is provided. When the contact piece is bent so as to bring the other contact piece into contact with the other contact piece, the base portion of the other contact piece is pressed against the protrusion and is bent. switch device.