JPS6364853B2 - - Google Patents

Description

【発明の詳細な説明】 この発明は接点ブロツクを用いた小型電磁継電
器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact electromagnetic relay using a contact block.

近年、電子回路素子の小型化に伴い、電磁継電
器の小型化も強く要請されている。しかして電磁
継電器はその構造が複雑で構成部品点数が多いた
め、小型化すると、その組立構造の難度が増す。
このため従来の小型電磁継電器では、ネジ止め、
位置調整作業などを要さず単に嵌め合わせや接着
のみで簡単に且つ均一に組立構造できるようにす
るために、複数の端子を予め正確に配置して絶縁
材料でモールドして固定し、端子の他端側に接点
などを取り付けて接点バネ組みを構成した接点ブ
ロツクを用いている。 In recent years, with the miniaturization of electronic circuit elements, there has been a strong demand for miniaturization of electromagnetic relays. However, since the electromagnetic relay has a complex structure and a large number of component parts, miniaturization increases the difficulty of assembling the electromagnetic relay.
For this reason, conventional small electromagnetic relays cannot be fixed with screws or
In order to be able to easily and uniformly assemble the structure by simply fitting and gluing without the need for position adjustment work, multiple terminals are placed accurately in advance and fixed by molding with insulating material. A contact block is used, with a contact and the like attached to the other end to form a contact spring assembly.

第１〜３図は上記接点ブロツクの従来の一例を
示すもので、第１図に示すように上端にそれぞれ
接続片１、台座片２、固定接点用板片３，４が形
成された端子５，６，７，８を配置し上下に貫ぬ
くように絶縁部材９でモールドし、第２図に示す
ように固定接点用板片３，４にそれぞれ異なる面
に固定接点３ａ，４ａを取り付け、第１，２図に
示すように固定接点用板片３，４を異なる高さで
折曲げ、また、台座片２、接続片１も折曲げ、第
３図に示すように台座片２に表裏両面に可動接点
１０ａ，１０ｂを有する可動接点バネ１０の一端
を取り付けている。 1 to 3 show an example of the conventional contact block. As shown in FIG. 1, a terminal 5 has a connecting piece 1, a pedestal piece 2, and fixed contact plate pieces 3 and 4 formed at the upper end, respectively. , 6, 7, and 8 are placed and molded with an insulating member 9 so as to penetrate vertically, and as shown in FIG. 2, fixed contacts 3a and 4a are attached to different surfaces of the fixed contact plate pieces 3 and 4, respectively. As shown in Figures 1 and 2, the fixed contact plate pieces 3 and 4 are bent at different heights, and the pedestal piece 2 and connection piece 1 are also bent, and the pedestal piece 2 is placed on both sides as shown in Figure 3. One end of a movable contact spring 10 having movable contacts 10a and 10b on both sides is attached.

第４図は上記の接点ブロツクを用いて組立てた
従来の小型電磁継電器を示し、矩形箱状のケース
１１内に前記二つの接点ブロツク１２，１２を向
かい合わせて収納し、両接点ブロツク１２，１２
の間に電磁石１３を収納し、底蓋１４を端子５〜
８が下方に貫通突出するようにケース１１に取り
付けて接着する。電磁石１３の一端上側には接極
子１５及びバネ部材１６を収納し、接極子１５の
揺動に応じて前記台座片８に取り付けた可動接点
バネ１０を移動させて接点３ａ，４ａの切り換え
がなされる。 FIG. 4 shows a conventional small electromagnetic relay assembled using the above-mentioned contact blocks.
The electromagnet 13 is housed between the terminals 5 and 5, and the bottom cover 14 is connected between the terminals 5 and 5.
8 is attached and glued to the case 11 so that it protrudes downward. An armature 15 and a spring member 16 are housed above one end of the electromagnet 13, and as the armature 15 swings, a movable contact spring 10 attached to the pedestal piece 8 is moved to switch between the contacts 3a and 4a. Ru.

第５図は接点ブロツクを用いた従来の小型電磁
継電器の他の一例を示すもので、第６図に示すよ
うに接点ブロツク１２′の絶縁部材９′を、箱体を
二分割した如き形状に形成し、二つの接点ブロツ
ク１２′，１２′の内側に電磁石１３′その他を収
納して突き合わせて接着し、上部にカバー１７を
被せて接着する。 Fig. 5 shows another example of a conventional small electromagnetic relay using a contact block.As shown in Fig. 6, the insulating member 9' of the contact block 12' is shaped like a box divided into two parts. The electromagnets 13' and others are housed inside the two contact blocks 12', 12', and they are butted and bonded together, and a cover 17 is placed on top and bonded.

しかして、第４図、第５図にそれぞれ示した従
来の小型電磁継電器では、電磁石１３（１３′）
が二つの接点ブロツク１２（１２′）の絶縁部材
の間の空間に収容されているが、絶縁部材は充分
な肉厚を必要とするので、電磁石の収容空間が制
限される。このため電磁石に大きなものと用いる
ことができず、コイル巻数を大きくすることがで
きず、電磁石の必要な駆動力を得るには消費電力
が大となる欠点があつた。また上記のいずれかの
小型電磁継電器でも、接点機構が電磁石に関して
端子と反対側に位置するので、モールドされる端
子を構成する導電部材の長さが大とならざるを得
ず、このため導体抵抗が大となる欠点があつた。 However, in the conventional small electromagnetic relays shown in FIGS. 4 and 5, the electromagnet 13 (13')
is accommodated in the space between the insulating members of the two contact blocks 12 (12'), but since the insulating member needs to be sufficiently thick, the space in which the electromagnet can be accommodated is limited. For this reason, a large electromagnet cannot be used, the number of coil turns cannot be increased, and the power consumption is large to obtain the necessary driving force of the electromagnet. In addition, in any of the above-mentioned small electromagnetic relays, the contact mechanism is located on the opposite side of the terminal with respect to the electromagnet, so the length of the conductive member that makes up the molded terminal must be large, which results in conductor resistance. There was a major drawback.

また従来の小型電磁継電器では、二つの固定接
点用板片３，４（３′，４′）が第２図に示すよう
にいずれも絶縁部材９（９′）の上方で折曲され
るので、接点３ａ，４ａをそれぞれ異なる面に取
り付けねばならず、このため取り付け作業が煩雑
であるという欠点があつた。また異なる高さで各
固定接点用板片３，４（３′，４′）を折曲しなけ
ればならないので、折曲げ作業が煩雑であるとい
う欠点もあつた。 In addition, in the conventional small electromagnetic relay, the two fixed contact plate pieces 3 and 4 (3', 4') are both bent above the insulating member 9 (9'), as shown in Figure 2. However, the contacts 3a and 4a have to be attached to different surfaces, which makes the attachment work complicated. Furthermore, since the fixed contact plate pieces 3, 4 (3', 4') must be bent at different heights, the bending operation is complicated.

また小型電磁継電器では、電磁石１３のコイル
１３ａの上側面の継鉄１３ｂ（第４図ｂ参照）の
端面角部１３b′を支点としてＬ字状の接極子１５
を揺動可動に支持するためにバネ部材１６を用い
るが、従来の小型電磁継電器ではバネ部材１６は
例えば第４図及び第７図に示すように一端側の基
部１６ａがケース１１に固定され、この基部１６
ａから折曲延設された支点押圧用板バネ部１６ｂ
及び接極子復旧用板バネ部１６ｃとを有する構造
となつていて、支点押圧用板バネ部１６ｂが接極
子１５の折曲部１５ａの外角部１５ｃに当接して
内角部１５ｂを継鉄１３ｂの端面角部１３b′へ押
圧し、接極子復旧用板バネ部１６ｃが接極子１５
の長片１５ｄを押圧している。このため、支点押
圧用板バネ部１６ｂの押圧力によつて接極子１５
は継鉄１３ｂの端面角部１３b′を支点として揺動
自在に支持されると共に、接極子復旧用板バネ部
１６ｃの押圧力によつて接極子１５は短片１５ｅ
が鉄心１３ｃから離れる方向の復旧力を常に付与
されていて、電磁石１３が通電されると接極子１
５は第４図ｂに鎖線で示す状態になり、通電が解
除されると接極子復旧用板バネ部１６ｃによる復
旧力等によつて回動して第４図ｂに実線に示す状
態になる。そして、この接極子１５の回動による
長片１５ｄの移動によつて可動接点バネ１０を駆
動して接点の開閉を行なつている。 In addition, in a small electromagnetic relay, an L-shaped armature 15 is formed with the end face corner 13b' of the yoke 13b (see FIG. 4b) on the upper surface of the coil 13a of the electromagnet 13 as a fulcrum.
A spring member 16 is used to swingably support the relay. In a conventional small electromagnetic relay, the spring member 16 has one end base 16a fixed to the case 11, as shown in FIGS. 4 and 7, for example. This base 16
The fulcrum pressing plate spring portion 16b is bent and extended from a.
and an armature restoration leaf spring part 16c, and the fulcrum pressing leaf spring part 16b abuts the outer corner part 15c of the bent part 15a of the armature 15, and the inner corner part 15b of the yoke 13b. The armature recovery leaf spring section 16c presses against the end face corner 13b', and the armature recovery leaf spring section 16c
The long piece 15d is pressed. Therefore, the armature 15 is
The armature 15 is supported swingably around the end face corner 13b' of the yoke 13b as a fulcrum, and the armature 15 is moved to the short piece 15e by the pressing force of the armature restoration leaf spring section 16c.
is always given a restoring force in the direction away from the iron core 13c, and when the electromagnet 13 is energized, the armature 1
5 is in the state shown by the chain line in FIG. 4b, and when the energization is canceled, it is rotated by the restoring force of the armature restoring plate spring part 16c, and becomes the state shown in the solid line in FIG. 4b. . The movement of the long piece 15d due to the rotation of the armature 15 drives the movable contact spring 10 to open and close the contact.

しかして、接点の開閉動作が正確になされるた
めには、接極子１５の回動によつて与えられる可
動接点バネ１０への駆動力が常に安定した値とな
るようにしなければならないが、このためには、
接極子１５の回動支点がずれたりガタツキが生じ
ないように、接極子１５の内角部１５ｂと継鉄１
３ｂの端面角部１３b′とが充分な押圧力で当接す
るようにすると共に、復旧用板バネ部１６ｃによ
る復旧力を常に安定した値にしなければならな
い。 Therefore, in order to accurately open and close the contact, it is necessary to ensure that the driving force applied to the movable contact spring 10 by the rotation of the armature 15 is always at a stable value. In order to
In order to prevent the pivot point of the armature 15 from shifting or wobbling, the inner corner 15b of the armature 15 and the yoke 1 are connected.
3b and the end face corner 13b' should be brought into contact with sufficient pressing force, and the restoring force by the restoring leaf spring part 16c must always be kept at a stable value.

しかしながら、上記の小型電磁継電器ではバネ
部材１６が微少で板厚も薄いため接極子復旧用板
バネ部１６ｃ、支点押圧用板バネ部１６ｂの折曲
部１６b′，１６c′の曲げ精度を高くすることが難
しく、また接極子復旧用板バネ部１６ｃ、支点押
圧用板バネ部１６ｂのバネスパンも短いのでバネ
のスチフネスを小さくして、撓み量を大にするこ
とが非常に困難である。このためバネ部材１６の
作成における前記折曲部１６b′，１６c′の曲げ角
度、板バネ部１６ｂ，１６ｃの板厚、長さなどの
僅かな差異が、支点への押圧力や接極子の復旧力
の大きなバラツキとなつて顕われ、電磁継電器の
特性に大きなバラツキを生じるという欠点があつ
た。またバネ部材１６は基部１６ａをケース１１
に固定するため、バネ部材１６の取りはずし、交
換が困難という欠点もあつた。 However, in the above-mentioned small electromagnetic relay, since the spring member 16 is minute and the plate thickness is thin, the bending accuracy of the bending parts 16b' and 16c' of the armature recovery leaf spring part 16c and the fulcrum pressing leaf spring part 16b must be increased. Moreover, since the spring spans of the armature recovery plate spring part 16c and the fulcrum pressing plate spring part 16b are short, it is very difficult to reduce the stiffness of the spring and increase the amount of deflection. Therefore, slight differences in the bending angles of the bent parts 16b' and 16c', the plate thicknesses and lengths of the leaf spring parts 16b and 16c during the creation of the spring member 16 can cause pressure on the fulcrum and restoration of the armature. This is manifested in large variations in force, and has the disadvantage of causing large variations in the characteristics of electromagnetic relays. Further, the spring member 16 connects the base 16a to the case 11.
Another drawback is that the spring member 16 is difficult to remove and replace.

本発明はこれらの欠点を改め、電磁石の収納空
間を大きくとることができ、端子を構成する導電
部材の長さを小にし導体抵抗を小にすることがで
き、また接点の取付け作業及び接点用板片の折曲
げ作業を簡単にすることができ、さらに接極子を
支持するバネ部材のスパンを大にし、スチフネス
を小にすることができ、且つバネ部材の取りはず
し、交換が容易にできるようにした小型電磁継電
器を提供することを目的としている。 The present invention corrects these drawbacks, allows for a larger storage space for the electromagnet, reduces the length of the conductive member constituting the terminal, and reduces conductor resistance. The work of bending the plate piece can be simplified, and the span of the spring member that supports the armature can be increased to reduce the stiffness, and the spring member can be easily removed and replaced. The purpose is to provide a compact electromagnetic relay with a small size.

以下、図面に基いて本発明の一実施例を説明す
る。 Hereinafter, one embodiment of the present invention will be described based on the drawings.

第８図は本発明の一実施例による小型電磁継電
器の分解斜視図であつて、同図において２０は下
面が開口した中空長方体状のケース本体、３０は
鉄心３１、コイル３２、継鉄３３から成る電磁石
ブロツクである。継鉄３３は断面Ｌ字状に折曲さ
れた板状をなし、下面両側には嵌合突部３３ａを
備えていて、コイル３２の下面及び一端面を覆う
如く取り付けられている。４０は前記継鉄３３の
嵌合突部３３ａによつて電磁石ブロツク３０の下
部に取り付けるための接点ブロツク、６０は接極
子、７０は接極子６０を支持するためのバネ部
材、８０は底蓋である。底蓋８０には端子穴８０
ａ〜８０ｈが設けられている。 FIG. 8 is an exploded perspective view of a small electromagnetic relay according to an embodiment of the present invention, in which 20 is a hollow rectangular case body with an open bottom, 30 is an iron core 31, a coil 32, and a yoke. This is an electromagnetic block consisting of 33 pieces. The yoke 33 has a bent plate shape with an L-shaped cross section, has fitting protrusions 33a on both sides of the lower surface, and is attached to cover the lower surface and one end surface of the coil 32. 40 is a contact block to be attached to the lower part of the electromagnetic block 30 by the fitting protrusion 33a of the yoke 33, 60 is an armature, 70 is a spring member for supporting the armature 60, and 80 is a bottom cover. be. Terminal hole 80 in bottom cover 80
a to 80h are provided.

第９〜１２図は接点ブロツク４０の製造工程を
示すもので、接点ブロツク４０は一端に端子５０
ａ〜５３ａをそれぞれ備えた平板状の導電部材５
０〜５３が合成樹脂などからなるほぼ長方体状の
絶縁部材４１でモールドされている。前記端子５
０ａ〜５３ａはいずれも絶縁部材４１の下面側か
ら下方へ垂直に同一長さに突出している。 9 to 12 show the manufacturing process of the contact block 40. The contact block 40 has a terminal 50 at one end.
A flat conductive member 5 each provided with a to 53a.
0 to 53 are molded with a substantially rectangular insulating member 41 made of synthetic resin or the like. Said terminal 5
All of 0a to 53a protrude vertically downward from the lower surface side of the insulating member 41 to the same length.

導電部材５０は他端に絶縁部材４１の上面側か
ら上方へ電磁石コイルの上部近傍まで突出したコ
イル接続用の接続片５０ｂを備えている。接続片
５０ｂの先端には小突出部５０b′と耳部５０b″を
備えている。導電部材５１は他端に第９図に示す
ように、絶縁部材４１の下面に形成された切欠き
４２から端子５１ａと同様に下方に垂直に突出し
た台座片５１ｂを備えている。導電部材５２は他
端に導電部材４１の上面に形成された切欠き４３
から上方へ垂直に突出した固定接点用板片５２ｂ
を備えている。導電部材５３は他端に導電部材４
１の下面に形成された切欠き４４から端子５３ａ
と同様に下方に垂直に突出した固定接点用板片５
３ｂを備えている。これらの切欠き４２〜４４は
絶縁部材４１の上面、下面に平行な底面を備えて
いる。 The conductive member 50 is provided at the other end with a connecting piece 50b for connecting the coil that protrudes upward from the upper surface of the insulating member 41 to near the top of the electromagnetic coil. The tip of the connecting piece 50b is provided with a small protrusion 50b' and an ear 50b''.As shown in FIG. Like the terminal 51a, it is provided with a pedestal piece 51b that projects vertically downward.The conductive member 52 has a notch 43 formed on the upper surface of the conductive member 41 at the other end.
Fixed contact plate piece 52b vertically protruding upward from
It is equipped with The conductive member 53 has the conductive member 4 at the other end.
1 from the notch 44 formed on the lower surface of the terminal 53a.
Similarly, the fixed contact plate piece 5 protrudes vertically downward.
3b. These cutouts 42 to 44 have bottom surfaces parallel to the upper and lower surfaces of the insulating member 41.

絶縁部材４１の上面には突出体４５が突設さ
れ、この突出体４５には前記継鉄３３の嵌合突部
３３ａが嵌合するための嵌合穴４５ａが設けてあ
る。嵌合穴４５ａの上縁部４５a′は前記嵌合状態
を強固にするための円弧状に下側へ膨出してい
る。 A protrusion 45 is protruded from the upper surface of the insulating member 41, and the protrusion 45 is provided with a fitting hole 45a into which the fitting protrusion 33a of the yoke 33 is fitted. The upper edge 45a' of the fitting hole 45a bulges downward in an arc shape to strengthen the fitted state.

前記固定接点用板片５２ｂ，５３ｂにはそれぞ
れ固定接点５２ｃ，５３ｃを第１０図に示すよう
に同一面側から溶接などによつて取り付け、切欠
き４３，４４の底面に沿つて固定接点５２ｃ，５
３ｃが向かい合うように直角に折曲げる。また台
座片５１ｂにも同一面側から可動接点バネ５４の
基部を溶接などによつて取り付け、切欠き４２の
底面に沿つて直角に折曲げて、可動接点バネ５４
を第１２図に示すように二つの固定接点用板片５
２ｂ，５３ｂの間に位置させる。 Fixed contacts 52c and 53c are respectively attached to the fixed contact plate pieces 52b and 53b from the same side by welding as shown in FIG. 5
Fold it at right angles so that 3c faces each other. In addition, the base of the movable contact spring 54 is attached to the pedestal piece 51b from the same side by welding or the like, and the movable contact spring 54 is bent at right angles along the bottom surface of the notch 42.
As shown in Fig. 12, the two fixed contact plate pieces 5 are
2b and 53b.

可動接点バネ５４は第８図に示すように双子構
造であつて、第１２図に示すように上面側の固定
接点５２ｃと対応した位置に可動接点５４ａを有
し、下面側の固定接点５３ｃと対応した位置に可
動接点５４ｂを有し、基部近傍のテンシヨン曲げ
部５４ｃ及び先端近傍の段部５４ｄによつて上側
の固定接点５２ｃに上面の可動接点５４ａが強く
密着する方向の復旧力を与えられている。 The movable contact spring 54 has a twin structure as shown in FIG. 8, and has a movable contact 54a at a position corresponding to the fixed contact 52c on the upper surface side and a fixed contact 53c on the lower surface side as shown in FIG. The movable contact 54b is provided at a corresponding position, and the tension bending portion 54c near the base and the stepped portion 54d near the tip provide a restoring force in the direction in which the movable contact 54a on the upper surface comes into strong contact with the upper fixed contact 52c. ing.

また絶縁部材４１の一端上面にはバネ部材７０
を係止するための係止溝４６を複数備えている。 Further, a spring member 70 is provided on the upper surface of one end of the insulating member 41.
It is provided with a plurality of locking grooves 46 for locking.

接極子６０は第１３図に示すようにほぼＬ字状
に鈍角に折曲された板状をなし、折曲げた内角部
６０ａが前記継鉄３３の端面角部３３ｂに当接し
て端面角部３３ｂを支点として揺動可能となるよ
うに、バネ部材７０によつて支持される。接極子
６０の長片６０ｃの先端には、カード６１を取り
付けるための薄肉の挿入片６０ｅを備えている。
また長片６０ｃは長手方向の長穴６０ｆを備えて
いる。 As shown in FIG. 13, the armature 60 has a plate shape bent at an obtuse angle into a substantially L-shape, and the bent inner corner 60a abuts the end corner 33b of the yoke 33 to form an end corner. It is supported by a spring member 70 so as to be able to swing about 33b as a fulcrum. A thin insertion piece 60e for attaching a card 61 is provided at the tip of the long piece 60c of the armature 60.
Further, the long piece 60c is provided with a long hole 60f in the longitudinal direction.

バネ部材７０は第１４，１５図に示す如く、前
記接極子６０のＬ字状の二片（長片６０ｃ及び短
片６０ｄ）の先端部近傍において当接するよう
に、接極子６０の二片６０ｃ，６０ｄのなす角度
より小さい角度で曲折された二脚７１ａ，７１ｂ
を有する第１の板バネ部７１と、この第１の板バ
ネ部７１の短脚７１ａの先端部から二叉状にほぼ
短脚７１ａに沿つて短脚７１ａを超える長さに延
設された第２の板バネ部７２とから成る。 As shown in FIGS. 14 and 15, the spring member 70 is arranged so that the two L-shaped pieces 60c and 60d of the armature 60 come into contact with each other near the tips of the two pieces 60c and 60d. Bipods 71a and 71b bent at an angle smaller than the angle formed by 60d
A first leaf spring part 71 having a first leaf spring part 71, and a length extending from the tip of the short leg 71a of the first leaf spring part 71 substantially along the short leg 71a in a bifurcated shape to a length exceeding the short leg 71a. It consists of a second plate spring part 72.

第１の板バネ部７１の長脚７１ｂの先端には絶
縁材料から成るカード６１がモールドによつて固
着されている。カード６１は第１４図に示すよう
に両側に接極子６０の挿入片６０ｅ，６０ｅが嵌
合される嵌合溝６１ａ，６１を備えている。そし
て、この嵌合溝６１ａ，６１ａに挿入片６０ｅ，
６０ｅを嵌合すれば、第１５図のようにバネ部材
７０の長脚７１ｂの先端が接極子６０に固定され
る。 A card 61 made of an insulating material is fixed to the tip of the long leg 71b of the first leaf spring section 71 by a mold. As shown in FIG. 14, the card 61 is provided with fitting grooves 61a, 61 on both sides into which insertion pieces 60e, 60e of the armature 60 are fitted. Then, the insertion pieces 60e,
60e, the tips of the long legs 71b of the spring member 70 are fixed to the armature 60 as shown in FIG.

ケース本体２０は、継鉄３３の両側に二つの接
点ブロツク４０，４０を取り付けた場合に二つの
絶縁部材４１，４１がケース本体２０の内壁に完
全に適合する寸法に設定されている。 The case body 20 is dimensioned so that when the two contact blocks 40, 40 are attached to both sides of the yoke 33, the two insulating members 41, 41 completely fit the inner wall of the case body 20.

以上の各構成部品は第１６図の如く組立てられ
る。 The above components are assembled as shown in FIG.

即ち、第１５図に示すように接極子６０の背面
にバネ部材７０を取り付け、接極子６０の内角部
６０ａが継鉄３３の端面角部３３ｂに当接するよ
うに継鉄３３の下面側に配置し、継鉄３３の両側
の嵌合突部３３ａに接点ブロツク４０の絶縁部材
４１上部の突出体４５の嵌合穴４５ａを嵌合させ
て継鉄３３の両側下方に二つの接点ブロツク４
０，４０を取り付け、バネ部材７０の第２の板バ
ネ部７２の自由端７２ａを内側下方から絶縁部材
４１の上面へ押し上げるようにして係止溝４６に
係止する。接続片５０ｂ，５０ｂの小突出部５０
b′，５０b′にそれぞれコイル３２の巻始めと巻終
りのリード線３２ａ，３２ｂをからげてハンダ付
けによつて固定し、耳部５０b″，５０b″をコイル
３２の側部に接着剤で接着する。 That is, as shown in FIG. 15, a spring member 70 is attached to the back of the armature 60, and arranged on the lower surface side of the yoke 33 so that the inner corner 60a of the armature 60 abuts the end corner 33b of the yoke 33. Then, the fitting holes 45a of the protrusion 45 on the upper part of the insulating member 41 of the contact block 40 are fitted into the fitting protrusions 33a on both sides of the yoke 33, so that the two contact blocks 4 are installed below both sides of the yoke 33.
0 and 40, and the free end 72a of the second plate spring portion 72 of the spring member 70 is locked in the locking groove 46 by being pushed up from the inside downward toward the upper surface of the insulating member 41. Small protrusion 50 of connecting pieces 50b, 50b
The lead wires 32a and 32b at the beginning and end of winding of the coil 32 are tied around b' and 50b', respectively, and fixed by soldering, and the ears 50b'' and 50b'' are attached to the sides of the coil 32 with adhesive. Glue.

このように電磁石ブロツク３０、二つの接点ブ
ロツク４０，４０、接極子６０、バネ部材７０を
組み合わせたものをケース本体２０内に挿入す
る。ケース本体２０の内壁に絶縁部材４１，４１
は適合して挿入されるからケース本体２０内での
ガタツキは生じない。 The combination of the electromagnetic block 30, the two contact blocks 40, 40, the armature 60, and the spring member 70 is inserted into the case body 20 in this manner. Insulating members 41, 41 are provided on the inner wall of the case body 20.
Since they are inserted in a compatible manner, no rattling occurs within the case body 20.

次に絶縁部材４１から下方に突出した端子５０
ａ〜５３ａを底蓋８０の端子穴８０ａ〜８０ｈに
貫通させて、底蓋８０をケース本体２０の下面開
口部に取り付け、底蓋８０の四辺及び端子穴８０
ａ〜８０ｈに接着剤などを塗布して密閉する。第
１７図はこのようにして組立てた小型電磁継電器
を示している。 Next, a terminal 50 protrudes downward from the insulating member 41.
a to 53a are passed through the terminal holes 80a to 80h of the bottom cover 80, and the bottom cover 80 is attached to the lower opening of the case body 20, and the four sides of the bottom cover 80 and the terminal holes 80
Apply adhesive or the like to parts a to 80h to seal them. FIG. 17 shows a small electromagnetic relay assembled in this manner.

第１８図はバネ部材７０の作動を説明するため
に要部を拡大して描いた図である。 FIG. 18 is an enlarged view of the main parts to explain the operation of the spring member 70.

第２の板バネ部７２の自由端７２ａは下方から
第１の板バネ部７１のバネ性に抗して上方へ、且
つ第２の板バネ部７２のバネ性に抗して右方へ
と、即ち斜め上方（矢印Ｃで示す）へと押し上げ
るようにして、絶縁部材４１の係止溝４６に係止
されている。このように自由端７２ｂが係止溝４
６に係止されることによつて、第１の板バネ部７
１の折曲部７３の曲げ角度が第１の板バネ部７１
のバネ性に抗して開くように押圧され、且つ第２
の板バネ部７２の自由端７２ａは、自由状態（第
１４図ａ）から第１８図に示すように第２の板バ
ネ部７２のバネ性及び第１の板バネ部７１のバネ
性に抗して第１の板バネ部７１の長脚７１ｂ方向
へやや撓むように押圧されている。 The free end 72a of the second leaf spring part 72 moves upward from below against the springiness of the first leaf spring part 71 and to the right against the springiness of the second leaf spring part 72. That is, it is locked in the locking groove 46 of the insulating member 41 in such a manner that it is pushed upward diagonally (indicated by arrow C). In this way, the free end 72b is connected to the locking groove 4.
6, the first plate spring portion 7
The bending angle of the first bent portion 73 is the same as that of the first leaf spring portion 71.
is pressed to open against the springiness of the second
The free end 72a of the leaf spring part 72 resists the spring properties of the second leaf spring part 72 and the spring property of the first leaf spring part 71, as shown in FIG. 18 from the free state (FIG. 14a). The first plate spring portion 71 is pressed so as to be slightly bent in the direction of the long leg 71b.

このため接極子６０は、第１の板バネ部７１の
長脚７１ｂ及び短脚７１ａの先端部によつてそれ
ぞれ長片６０ｃ及び短片６０ｄの先端部に押圧力
Ｂ，Ａを受けるので、接極子６０の内角部６０ａ
は継鉄３３の端面角部３３ｂに押圧される（矢印
Ｄで示す）。従つて、接極子６０は第１の板バネ
部７１の二脚７１ａ，７１ｂの先端部で挾持され
て、継鉄３３の端面角部３３ｂを支点として揺動
可能となるように支持されている。また同時に、
第２の板バネ部７２の自由端７２ａは第２の板バ
ネ部７２のバネ性及び第１の板バネ部７１のバネ
性に抗して長脚７１ｂ方向に撓められているの
で、前記押圧力Ｂによる接極子６０への反時計方
向の回転モーメントM_Bは押圧力Ａによる接極子
６０への時計方向の回転モーメントM_Aより大と
なつているので、接極子６０は端面角部３３ｂを
支点として反時計方向の回転モーメントＭ（但し
Ｍ＝M_B−M_A）を受けている。そして、この回転
モーメントＭは、電磁石コイル３２に通電された
場合に接極子６０の短片６０ｄが鉄心３１に吸引
されて時計方向に回転する回転モーメントより小
になるように設定されている。 Therefore, the armature 60 receives pressing forces B and A from the tips of the long leg 71b and the short leg 71a of the first leaf spring section 71, respectively, on the tips of the long piece 60c and the short piece 60d. 60 inner corner 60a
is pressed against the end face corner 33b of the yoke 33 (indicated by arrow D). Therefore, the armature 60 is supported by the tips of the two legs 71a and 71b of the first leaf spring section 71 so as to be able to swing about the end corner 33b of the yoke 33 as a fulcrum. . At the same time,
The free end 72a of the second leaf spring part 72 is bent in the direction of the long leg 71b against the spring properties of the second leaf spring part 72 and the spring property of the first leaf spring part 71. Since the counterclockwise rotational moment M _B to the armature 60 due to the pressing force B is larger than the clockwise rotational moment M A to the armature 60 due to the pressing force _A , the armature 60 is rotated at the end face corner 33b. It receives a counterclockwise rotational moment M (where M = M _B - M _A ) using the fulcrum as the fulcrum. The rotational moment M is set to be smaller than the rotational moment at which the short piece 60d of the armature 60 is attracted to the iron core 31 and rotates clockwise when the electromagnetic coil 32 is energized.

次に上記実施例の小型電磁継電器の動作を説明
する。 Next, the operation of the small electromagnetic relay of the above embodiment will be explained.

第１７図ｂに示すように、電磁石コイル３２に
通電されていないと、接極子６０は前記したバネ
部材７０による復旧力によつて鉄心３１から短片
６０ｄが離れた状態に保持される。従つてカード
６１は可動接点バネ５４から離れていて、可動接
点バネ５４の上面の可動接点５４ａが上方の固定
接点５２ｃに可動接点バネ５４のバネ性によつて
強く押圧されて接触している。 As shown in FIG. 17b, when the electromagnetic coil 32 is not energized, the armature 60 is held in a state where the short piece 60d is separated from the iron core 31 by the restoring force of the spring member 70 described above. Therefore, the card 61 is separated from the movable contact spring 54, and the movable contact 54a on the upper surface of the movable contact spring 54 is strongly pressed by the springiness of the movable contact spring 54 and comes into contact with the upper fixed contact 52c.

電磁石コイル３２に通電されると、バネ部材７
０による復旧力に抗して接極子６０は短片６０ｄ
が鉄心３１に吸引されて時計方向に継鉄３３の端
面角部３３ｂを支点として回動する。このためカ
ード６１によつて可動接点バネ５４は下方へバネ
性に抗して押し下げられ、可動接点バネ５４の上
面の接点５２ｃは上方の固定接点５２ｃから離
れ、下面の接点５３ｃが下方の固定接点５２ｃに
当接する。通電が解除されると、バネ部材７０に
よる復旧力によつて接極子６０は反時計方向に回
動して元の状態に戻る。このように接極子６０の
揺動によつて接点の切り換えがなされる。 When the electromagnetic coil 32 is energized, the spring member 7
The armature 60 resists the restoring force due to 0, and the short piece 60d
is attracted to the iron core 31 and rotates clockwise around the end face corner 33b of the yoke 33 as a fulcrum. Therefore, the movable contact spring 54 is pushed down by the card 61 against the spring force, the contact 52c on the upper surface of the movable contact spring 54 separates from the upper fixed contact 52c, and the contact 53c on the lower surface becomes the lower fixed contact. 52c. When the current is turned off, the armature 60 rotates counterclockwise due to the restoring force of the spring member 70 and returns to its original state. In this way, the contacts are switched by swinging the armature 60.

上記実施例では、接続片５０ｂが絶縁部材４１
の上方へコイル３２の側面まで延設されているの
で、コイルの巻始め、巻終りのリード線３２ａ，
３２ｂを長くのばす必要がなくなるのでリード線
３２ａ，３２ｂが邪魔にならず、リード線３２
ａ，３２ｂの線からげ及びハンダ付けが容易にな
ると共に、耳部５０b″を接着しているので外部か
らの振動によつて断線するおそれがない。また接
着剤塗布による密封は底蓋８０の四辺及び端子穴
８０ａ〜８０ｈのみを行なえばよいから、第４
図、第５図の従来例に比して密封のための接着剤
塗布個所が少なくなり密封性がよくなる。なお、
バネ部材７０の第２の板バネ部７２の自由端７２
ａを係止する係止溝４６を複数個所に設けてある
ので、係止溝４６を選ぶことによつてバネ部材２
７による復旧力及び支点押圧力を調整できる。 In the above embodiment, the connecting piece 50b is connected to the insulating member 41.
Since it extends upward to the side of the coil 32, the lead wire 32a at the beginning and end of the coil winding,
Since there is no need to extend the lead wire 32b for a long time, the lead wires 32a and 32b do not get in the way.
It is easy to connect and solder the wires a and 32b, and since the ears 50b'' are glued, there is no risk of the wires breaking due to external vibrations.Furthermore, sealing by applying adhesive can be done by sealing the bottom cover 80. Since only the four sides and the terminal holes 80a to 80h need to be filled, the fourth
Compared to the conventional example shown in FIGS. 5 and 5, there are fewer places where adhesive is applied for sealing, and the sealing performance is improved. In addition,
Free end 72 of second leaf spring portion 72 of spring member 70
Since a plurality of locking grooves 46 are provided for locking the spring member 2, you can select the locking groove 46 to lock the spring member 2.
The restoring force and fulcrum pressing force by 7 can be adjusted.

本発明の小型電磁継電器は上記のような構造で
あるので、以下の効果を有する。 Since the compact electromagnetic relay of the present invention has the above structure, it has the following effects.

(イ) 従来の小型電磁継電器では、電磁石収納部が
端子と接点部の間にあつたので二つの接点ブロ
ツクの絶縁部材によつて電磁石の収納空間が制
限されていたのに対し、本発明の小型電磁継電
器では、第１７図ａに示すように接点部と端子
５０ａ〜５３ａとが電磁石に関して同一側に配
置されているので、電磁石の収納空間が接点ブ
ロツク４０の絶縁部材４１によつて制限される
ことが全くない。従つて電磁石の収納空間が同
一容積のケースを用いた場合に従来よりはるか
に大きくとることができるため、接極子を駆動
するのに充分な吸引力のコイル巻数の大きい電
磁石を用いることができ、小電力で必要な駆動
力を得ることができる。また絶縁部材４１の上
下方向の長さもはるかに小さくなるので、モー
ルドされる導電部材５０〜５３の長さも小さく
なり、導体抵抗が小さくなる。(b) In conventional small electromagnetic relays, the electromagnet storage space was located between the terminal and the contact section, so the storage space for the electromagnet was limited by the insulating members of the two contact blocks. In the small electromagnetic relay, the contact portion and the terminals 50a to 53a are arranged on the same side with respect to the electromagnet as shown in FIG. There is nothing to do. Therefore, the storage space for the electromagnet can be much larger than before when using a case with the same volume, so it is possible to use an electromagnet with a large number of coil turns that has sufficient attractive force to drive the armature. Necessary driving force can be obtained with small electric power. Further, since the length of the insulating member 41 in the vertical direction is also much smaller, the length of the conductive members 50 to 53 to be molded is also reduced, and the conductor resistance is reduced.

(ロ) 従来の小型電磁継電器では、二つの固定接点
用板片が絶縁部材の同一面側に突出していたの
に対し、本発明の小型電磁継電器では、二つの
固定接点用板片５２ｂ，５３ｂが第１０図に示
すように絶縁部材４１の互いに反対の面側に突
出しているので接点５２ｃ，５３ｃを同一面側
で取り付けることができ、接点の取り付け作業
が容易になる。また固定接点用板片５２ｂ，５
３ｂを切欠き４３，４４に沿つて折曲げればよ
いから折曲げ作業も容易且つ正確になる。(b) In the conventional small electromagnetic relay, the two fixed contact plate pieces protruded from the same side of the insulating member, whereas in the small electromagnetic relay of the present invention, the two fixed contact plate pieces 52b, 53b As shown in FIG. 10, the contacts 52c and 53c can be attached on the same side because they protrude from opposite sides of the insulating member 41, making the work of attaching the contacts easier. In addition, plate pieces 52b, 5 for fixed contacts
3b can be bent along the notches 43 and 44, making the bending operation easy and accurate.

(ハ) 従来の小型電磁継電器では、バネ部材が第７
図の如く支点押圧用と復旧用とで力学的にそれ
ぞれ独立であつて復旧のためのバネスパンは板
バネ部１６ｃのみの長さとなる。これに対し本
発明の小型電磁継電器では、第１８図に示した
ように第１の板バネ部７１と第２の板バネ部７
２とが協動して復旧力を生じるから、復旧力の
ためのバネスパンの長さはほぼ第１の板バネ部
７１と第２の板バネ部７２の長さを加算した長
さとなり、バネスパンが格段に大となり、スチ
フネスが格段に小さくなる。このためバラツキ
のない安定した復旧力を得ることができる。ま
たバネ部材７０の自由端７２ａを係止溝４６か
らはずすことによつてバネ部材７０の取りはず
し、交換を用意を行なうことができる。(c) In conventional small electromagnetic relays, the spring member is the seventh
As shown in the figure, the spring span for pressing the fulcrum and for restoring are dynamically independent, and the length of the spring span for restoring is only the leaf spring portion 16c. On the other hand, in the small electromagnetic relay of the present invention, as shown in FIG.
2 cooperate to generate a restoring force, the length of the spring span for the restoring force is approximately the sum of the lengths of the first leaf spring part 71 and the second leaf spring part 72, and the length of the spring span becomes much larger, and the stiffness becomes much smaller. Therefore, stable recovery power without variation can be obtained. Further, by removing the free end 72a of the spring member 70 from the locking groove 46, the spring member 70 can be removed and prepared for replacement.

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

第１図は加工前の従来の接点ブロツクを示す斜
視図、第２図はその断面図、第３図は加工後の従
来の接点ブロツクを示す斜視図、第４図ａは第３
図に示した接点ブロツクを用いた従来の小型電磁
継電器を示す側面断面図、第４図ｂはその正面断
面図、第５図は従来の他の小型電磁継電器を示す
側面断面図、第６図は第５図に示した小型電磁継
電器に用いる接点ブロツクを示す斜視図、第７図
は従来のバネ部材を示す斜視図である。第８図は
本発明の一実施例による小型電磁継電器の分解斜
視図、第９図は加工前の接点ブロツクを示す正面
図、第１０図は固定接点用板片の折曲げを示す側
面図、第１１図は加工前の接点ブロツクを示す斜
視図、第１２図は加工後の接点ブロツクを示す正
面図、第１３図は接極子を示す斜視図、第１４図
ａはバネ部材を示す正面図、第１４図ｂは斜視
図、第１５図は接極子にバネ部材を取り付けた状
態を示す斜視図、第１６図は組立ての途中状態を
示す斜視図、第１７図ａは組立て後の小型電磁継
電器を示す側面断面図、第１７図ｂはその正面断
面図、第１８図はバネ部材を作用を説明するため
の説明図である。 ２０……ケース本体、３０……電磁石ブロツ
ク、３１……鉄心、３２……コイル、３３……継
鉄、３３ａ……嵌合突部、３３ｂ……端面角部、
４０……接点ブロツク、４１……絶縁部材、４
２，４３，４４……切欠き、４５……突出体、４
５ａ……嵌合穴、４６……係止溝、５０，５１，
５２，５３……導電部材、５０ａ，５１ａ，５２
ａ，５３ａ……端子、５０ｂ……接続片、５１ｂ
……台座片、５２ｂ，５３ｂ……固定接点用板
片、５２ｃ，５３ｃ……固定接点、５４……可動
接点バネ、５４ａ，５４ｂ……可動接点、６０…
…接極子、６０ａ……内角部、６０ｃ……長片、
６０ｄ……短片、６０ｅ……挿入片、６１……カ
ード、６１ａ……嵌合溝、７０……バネ部材、７
１……第１の板バネ部、７１ａ……短脚、７１ｂ
……長脚、７２……第２の板バネ部、７２ａ……
自由端、７３……折曲部、８０……底蓋、８０ａ
〜８０ｈ……端子穴。 Fig. 1 is a perspective view of a conventional contact block before processing, Fig. 2 is a sectional view thereof, Fig. 3 is a perspective view of a conventional contact block after processing, and Fig. 4a is a perspective view of a conventional contact block.
FIG. 4b is a front sectional view of the conventional small electromagnetic relay using the contact block shown in the figure, FIG. 5 is a side sectional view of another conventional small electromagnetic relay, and FIG. 5 is a perspective view showing a contact block used in the small electromagnetic relay shown in FIG. 5, and FIG. 7 is a perspective view showing a conventional spring member. FIG. 8 is an exploded perspective view of a small electromagnetic relay according to an embodiment of the present invention, FIG. 9 is a front view showing the contact block before processing, and FIG. 10 is a side view showing the bending of the fixed contact plate. Fig. 11 is a perspective view of the contact block before processing, Fig. 12 is a front view of the contact block after processing, Fig. 13 is a perspective view of the armature, and Fig. 14a is a front view of the spring member. , Fig. 14b is a perspective view, Fig. 15 is a perspective view showing the state in which the spring member is attached to the armature, Fig. 16 is a perspective view showing the state in the middle of assembly, and Fig. 17a is the small electromagnetic device after assembly. FIG. 17B is a side sectional view showing the relay, FIG. 17B is a front sectional view thereof, and FIG. 18 is an explanatory view for explaining the action of the spring member. 20... Case body, 30... Electromagnetic block, 31... Iron core, 32... Coil, 33... Yoke, 33a... Fitting protrusion, 33b... End face corner,
40...Contact block, 41...Insulating member, 4
2, 43, 44... Notch, 45... Projection, 4
5a... Fitting hole, 46... Locking groove, 50, 51,
52, 53... Conductive member, 50a, 51a, 52
a, 53a...Terminal, 50b...Connection piece, 51b
...Base piece, 52b, 53b...Fixed contact plate piece, 52c, 53c...Fixed contact, 54...Movable contact spring, 54a, 54b...Movable contact, 60...
...armature, 60a...inner corner part, 60c...long piece,
60d...short piece, 60e...insertion piece, 61...card, 61a...fitting groove, 70...spring member, 7
1...First leaf spring part, 71a...Short leg, 71b
...Long leg, 72...Second leaf spring part, 72a...
Free end, 73...Bent part, 80...Bottom cover, 80a
~80h...Terminal hole.

Claims (1)

【特許請求の範囲】 １ 一面が開口した中空長方体状のケース本体２
０と、 複数の端子穴を備え、前記ケース本体２０の開
口部を遮閉するように取付けられた底蓋８０と、 前記ケース本体２０内の前記開口部と反対側の
位置に収納された電磁石３２と、 前記電磁石３２に一片が固着され、他片が電磁
石３２の前記開口部側に沿つて設けられたＬ字状
の継鉄３３と、 内角部６０ｂが前記継鉄３３の前記他片の端面
角部３３ｂを支点として、前記継鉄３３に揺動自
在に支持されるようにほぼＬ字状に形成された、
電磁石３２と前記ケース本体２０の側壁間に位置
する一片６０ｄと、電磁石３２と前記開口部間に
位置する他片６０ｃとから成る接極子６０と、 両端部のみが前記接極子６０の両片６０ｄ，６
０ｃの端部にそれぞれ当接するようにくの字状に
形成された二片７１ａ，７１ｂで構成された第１
のバネ部７１と、前記接極子６０の両片６０ｄ，
６０ｃに当接された第１のバネ部７１の当接区間
内に、前記第１のバネ部７１が前記接極子６０に
押圧するような押圧力を与え且つ前記継鉄３３の
前記端面角部３３ｂを支点として前記接極子６０
をその前記他片６０ｃの先端が前記開口部から遠
去かる方向に回動するための回動力を与えるよう
に、前記第１のバネ部の前記一片７１ａからその
曲折された側に沿つて延長され、その延長部７２
ａが前記ケース本体２０内に支持固定された第２
のバネ部７２とで形成されるバネ部材７０と、 前記ケース本体２０内の前記電磁石３２と前記
底蓋８０との間に収納された絶縁部材４０と、前
記絶縁部材４０の前記底蓋８０側から外方に突出
され、前記底蓋８０の前記複数の端子穴を外方へ
貫通した複数の端子と、前記二つの各端子に電気
的にそれぞれ接続され、その他端が前記絶縁部材
４０の前記電磁石３２側及び前記底蓋８０側から
それぞれ外方へ突出され且つ前記絶縁部材４０の
同一側面がわに折曲げられた第１、第２の固定接
点用板片５２ｂ，５３ｂと、前記第１、第２の固
定接点用板片５２ｂ，５３ｂの互いに向かい合う
面にそれぞれ設けられた第１、第２の固定接点５
２ｃ，５３ｃと、前記二つの端子とは異なる前記
他の端子に電気的に接続され、その他端が前記絶
縁部材４０から突出して前記絶縁部材４０の前記
同一側面がわに折曲げられた可動接点用台座片５
１ｂと、前記台座片５１ｂに一端が固定され、前
記接極子６０の前記揺動によつて接極子６０の他
片６０ｃに接離するとともに前記第１、第２の固
定接点間を該接離に対応して移動する可動接点バ
ネ５４と、前記可動接点バネ５４の表裏両面に、
それぞれ前記第１、第２の固定接点５２ｃ，５３
ｃに接離するように対応した位置に固定された可
動接点５４ａ，５４ｂとを備えた接点ブロツク
と、 から成る小型電磁継電器。[Claims] 1. A case body 2 in the shape of a hollow rectangular parallelepiped with one side open.
0; a bottom cover 80 provided with a plurality of terminal holes and attached to close the opening of the case body 20; and an electromagnet housed in the case body 20 at a position opposite to the opening. 32, an L-shaped yoke 33 with one piece fixed to the electromagnet 32 and the other piece provided along the opening side of the electromagnet 32, and an inner corner 60b of the other piece of the yoke 33. It is formed into a substantially L-shape so as to be swingably supported by the yoke 33 with the end face corner 33b as a fulcrum.
An armature 60 consisting of one piece 60d located between the electromagnet 32 and the side wall of the case body 20, and another piece 60c located between the electromagnet 32 and the opening, and only both ends of the armature 60 are composed of two pieces 60d of the armature 60. ,6
The first piece is composed of two pieces 71a and 71b formed in a dogleg shape so as to abut on the ends of 0c, respectively.
the spring portion 71, both pieces 60d of the armature 60,
The first spring portion 71 applies a pressing force to the armature 60 within the contact section of the first spring portion 71 that is in contact with the armature 60c, and the end face corner portion of the yoke 33 The armature 60 with 33b as a fulcrum
extends from the one piece 71a of the first spring portion along the bent side thereof so as to provide a turning force for turning the tip of the other piece 60c in a direction away from the opening. and its extension 72
a is supported and fixed within the case body 20;
a spring member 70 formed of a spring portion 72; an insulating member 40 housed between the electromagnet 32 and the bottom cover 80 in the case body 20; A plurality of terminals protrude outward from the bottom cover 80 and pass through the plurality of terminal holes of the bottom cover 80, and are electrically connected to each of the two terminals, and the other end is connected to the terminal holes of the insulating member 40. First and second fixed contact plate pieces 52b, 53b protruding outward from the electromagnet 32 side and the bottom cover 80 side, respectively, and the same side surface of the insulating member 40 is bent all the way; , the first and second fixed contacts 5 provided on the mutually facing surfaces of the second fixed contact plate pieces 52b and 53b, respectively.
2c, 53c, and a movable contact electrically connected to the other terminal different from the two terminals, the other end protruding from the insulating member 40, and the same side surface of the insulating member 40 being bent. Pedestal piece 5
1b, one end is fixed to the pedestal piece 51b, and by the swinging of the armature 60, the armature 60 contacts and separates from the other piece 60c of the armature 60, and also connects and separates between the first and second fixed contacts. A movable contact spring 54 that moves in accordance with
The first and second fixed contacts 52c and 53, respectively.
A small electromagnetic relay comprising: a contact block having movable contacts 54a and 54b fixed at positions corresponding to contact and separation from the contact block;