JPH0227763B2 - - Google Patents
Info
- Publication number
- JPH0227763B2 JPH0227763B2 JP55077453A JP7745380A JPH0227763B2 JP H0227763 B2 JPH0227763 B2 JP H0227763B2 JP 55077453 A JP55077453 A JP 55077453A JP 7745380 A JP7745380 A JP 7745380A JP H0227763 B2 JPH0227763 B2 JP H0227763B2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- weight
- thickness
- micromotor
- welding
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 81
- 238000003466 welding Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000002950 deficient Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000010970 precious metal Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- OYJSZRRJQJAOFK-UHFFFAOYSA-N palladium ruthenium Chemical compound [Ru].[Pd] OYJSZRRJQJAOFK-UHFFFAOYSA-N 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
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- Manufacture Of Switches (AREA)
- Dc Machiner (AREA)
Description
本発明はマイクロモータ用機械式ガバナ可動接
点の製造方法に関する。
従来、マイクロモータ用機械式ガバナ可動接点
を製造するには、第１図ａに示す如く接点用板材
１をプレス抜きして円形のリングプロジエクシヨ
ン２ａ付接点材２を作り、次にこれを第１図ｂに
示す如く重錘３の一側上面にプロジエクシヨン溶
接し、次いで接点材２から離隔して重錘３の上面
に第１図ｃに示す如くばね材４を溶接する方法
と、第２図ａに示す如く接点用線材５を重錘３の
一側上面に溶接し、次にその接点用線材５を所要
の高さ位置にて第２図ｂに示す如く切断し、次い
で重錘３上に切り残された接点材５ａを第２図ｃ
に示す如くプレス成形して円板状になし、然る後
その円板状の接点材５a′から離隔して重錘３の上
面に第２図ｄに示す如くばね材４を溶接する方法
とがある。
ところでこれらの方法はいずれも重錘３に接点
材２や接点用線材５を溶接し且つばね材４を溶接
するので、溶接に手間〓がかかり、生産性が悪か
つた。また高価な貴金属を節約する為、重錘３上
の接点材２や５a′の厚さを薄くしたかつたができ
ず、また接触信頼性にとぼしかつた。即ち、前者
の製造方法では接点用板材１が極端に薄いとプレ
ス抜きした際、表面が球面状に突出した円形のリ
ングプロジエクシヨン２ａ付接点材２となるの
で、接点性能に悪影響を与えることになり、また
重錘３への溶接の際、中空の電極でリングプロジ
エクシヨン２ａを通して加圧溶接するので、中央
部がへこんだり、リングプロジエクシヨン２ａが
腰くだけになつたりしてうまく溶接できず、しか
もばりやちりが生じたりするので接点材２の厚さ
を薄くできなかつたのである。一方後者の製造方
法では重錘３上に切り残された接点材５ａを薄く
成形する為に加工率を高くすると接点材５ａや重
錘３が割れ、また重錘３上に溶接された接点用線
材５の切断高さを低くしたり重錘３上に溶接する
接点用線材５の線径を太くすると、うまく切断で
きなかつたり或いは切断が困難となるので、接点
材５a′の厚さを薄くすることができなかつた。
本発明は上記諸事情に鑑みなされたものであ
り、溶接工程が一回で済み、生産性の向上と自動
化を図ることができ、しかも重錘上の接点材を薄
くして高価な貴金属を節約でき、接触信頼性の高
いマイクロモータ用機械式ガバナ可動接点の製造
方法を提供せんとするものである。
本発明のマイクロモータ用機械式ガバナ可動接
点の製造方法の一例を図によつて説明すると、第
３図ａに示す如く重錘用帯材１０の上面の一側長
手方向に扁平角形断面の浅い凹溝１１を設けてこ
の凹溝１１内に第３図ｂに示す如く接点帯材１２
を嵌合の上圧延圧着し、次にこの複合帯材１３を
接点面が略正方形となるように第３図ｃに示す如
く複合帯材１３の長手方向と直角方向に切断し、
次いでこの切断片１４の接点面側の表面に第３図
ｄに示す如く接点材１２ａから離隔してばね材１
５の一端部をばね材１５の長手方向が圧延圧着さ
れた接点材１２ａと直角方向となるように溶接し
てマイクロモータ用機械式ガバナ可動接点１６を
得るものである。
かように本発明のマイクロモータ用機械式ガバ
ナ可動接点の製造方法は、重錘用帯材１０と接点
帯材１２とを圧延圧着により一体化するので、重
錘と接点材の厚み比と圧延加工率を適当に設定す
ることにより接点材の厚さを大幅に薄くすること
ができる。従つて従来の製造方法のように接点材
の溶接が不完全だつたり、接点材表面が球面状と
なつたり、接点材中央部がへこんだり、接点材周
囲にばりやちりが生じたり、或いは接点材が割れ
たり、接点材表面に切断痕（破断面）や凹凸が残
つたりするようなことは無い。
また本発明のマイクロモータ用機械式ガバナ可
動接点の製造方法では、手間〓のかかる溶接工程
が重錘とばね材との溶接の１回だけで接点材とば
ね材及び重錘とばね材の２回の溶接が不要である
ので、生産性が著しく向上し、自動化も容易であ
る。しかも、複合帯材は切断されるだけなので、
複合帯材の屑や不良品の発生もない。
次に本発明のマイクロモータ用機械式ガバナ可
動接点の製造方法の効果を明瞭ならしめる為にそ
の具体的な実施例と従来例について説明する。
実施例 １
第３図ａに示す如く幅7.5mm、厚さ2.5mmの圧延
された黄銅より成る重錘用帯材１０の一側端縁よ
り１mm隔てた位置の上面一側の長手方向に幅1.5
mm、深さ0.2mmの扁平角形断面の浅い凹溝１１を
設けてこの凹溝１１内に第３図ｂに示す如く幅
1.5mm、深さ0.3mmのPd−Ru10重量％（以下
「ｗ／ｏ」とする。）より成る接点帯材１２を嵌合
の上圧延圧着して、幅８mm、厚さ2.3mmの重錘用
帯材１０の一側端縁より１mm隔てた位置の上面一
側の凹溝１１内に幅1.5mm、厚さ0.3mmの接点帯材
１２を一体に有する複合帯材１３を成形し、次に
この複合帯材１３を接点が略正方形となるように
第３図ｃに示す如く長手方向と直角方向に幅2.3
mmに切断し、次いでこの切断片１４の上面に第３
図ｄに示す如く接点材１２ａから１mm離隔して長
さ11.5mm、厚さ0.2mmのBeCuより成るばね材１５
の一側部を長さ4.5mmにわたつて溶接してマイク
ロモータ用機械式ガバナ可動接点１６を得た。
実施例 ２
第３図ａに示す如く幅7.5mm、厚さ2.5mmのCu−
Ni30w／ｏより成る重錘用帯材１０の一側端縁
より１mm隔てた位置の上面一側の長手方向に幅
1.5mm、深さ0.2mmの扁平角形断面の浅い凹溝１１
を設けてこの凹溝１１内に第３図ｂに示す如く幅
1.5mm、厚さ0.3mmのAg−Pd40w／ｏ−Cu30w／
ｏより成る接点帯材１２を嵌合の上圧延圧着し
て、幅８mm、厚さ2.3mmの重錘用帯材１０の一側
端縁より１mm隔てた位置の上面一側の凹溝１１内
に幅1.5mm、厚さ0.3mmの接点帯材１２を一体に有
する複合帯材１３を成形し、次にこの複合帯材１
３を接点が略正方形となるように第３図ｃに示す
如く長手方向と直角方向に幅2.3mmに切断し、次
いでこの切断片１４の上面に第３図ｄに示す如く
接点材１２ａから１mm離隔して長さ11.5mm、厚さ
0.2mmのBeCuより成るばね材１５の一側部を長さ
4.5mmにわたつて溶接してマイクロモータ用機械
式ガバナ可動接点１６を得た。
従来例 １
第１図ａに示す如く厚さ0.1mmのPd−Ru10w／
ｏより成る接点用板材１をプレス抜きして直径
0.7mmの円形のリングプロジエクシヨン２ａ付接
点材２を作り、次にこれを第１図ｂに示す如く厚
さ2.3mm、長さ８mm、2.3mmのCu−Ni30w／ｏより
成る重錘３の一端縁より１mm隔てた位置の上面中
央にプロジエクシヨン溶接し、次いで接点材２か
ら１mm離隔して重錘３の上面に第１図ｃに示す如
く長さ11.5mm、厚さ0.2mmのBeCuより成るばね材
４の一側部を長さ4.5mmにわたつて溶接してマイ
クロモータ用機械式ガバナ可動接点を得た。
従来例 ２
第２図ａに示す如く厚さ0.7mmのPd−Ru10w／
ｏより成る接点用線材５を厚さ2.3mm、長さ８mm、
幅2.3mmの圧延された黄銅より成る重錘３の一端
縁より1.5mm離れた位置の上面中央に溶接し、次
にその接点用線材５を高さ0.6mmの位置にて第２
図ｂに示す如く切断し、次いで重錘３上に切り残
された接点材５ａを第２図ｃに示す如くプレス成
形して一端縁より１mm隔てた位置に直径1.5mm、
厚さ0.1mmの円板状の接点材５a′を形成し、然る
後その接点材５a′から１mm離隔して重錘３の上面
に第２図ｄに示す如く長さ11.5mm、厚さ0.2mmの
BeCuより成るばね材４の一側部を長さ4.5mmにわ
たつて溶接してマイクロモータ用機械式ガバナ可
動接点を得た。
然してこれら実施例１、２及び従来例１、２の
マイクロモータ用機械式ガバナ可動接点各100ケ
について重錘上の接点材の溶接状態、形状、表面
状等を検査したところ、下記の表に示すような結
果を得た。
The present invention relates to a method of manufacturing a mechanical governor movable contact for a micromotor. Conventionally, in order to manufacture a mechanical governor movable contact for a micromotor, as shown in FIG. A method of welding projection welding to the top surface of one side of the weight 3 as shown in FIG. 1b, and then welding a spring material 4 to the top surface of the weight 3 apart from the contact material 2 as shown in FIG. As shown in FIG. 2a, the contact wire 5 is welded to the upper surface of one side of the weight 3, and then the contact wire 5 is cut at a required height position as shown in FIG. 2b. The contact material 5a left uncut on the weight 3 is shown in Fig. 2c.
As shown in FIG. 2D, the spring material 4 is press-formed into a disk shape, and then the spring material 4 is welded to the upper surface of the weight 3 at a distance from the disk-shaped contact material 5a' as shown in FIG. 2D. There is. However, in all of these methods, the contact material 2 and the contact wire 5 are welded to the weight 3, and the spring material 4 is welded, so welding is time-consuming and productivity is poor. Furthermore, in order to save expensive precious metals, the thickness of the contact material 2 and 5a' on the weight 3 could not be made thinner, and the contact reliability was compromised. That is, in the former manufacturing method, if the contact plate material 1 is extremely thin, when it is pressed out, the contact material 2 with the ring projection 2a having a spherical protruding surface will be formed, which will adversely affect the contact performance. Also, when welding to the weight 3, pressure welding is carried out through the ring projection 2a with a hollow electrode, so the center part is not dented and the ring projection 2a is only bent, making it difficult to weld properly. Moreover, it was not possible to reduce the thickness of the contact material 2 because it would generate burrs and dust. On the other hand, in the latter manufacturing method, if the processing rate is increased to form the contact material 5a left uncut on the weight 3 into a thin layer, the contact material 5a and the weight 3 will break, and the contact material 5a left on the weight 3 may break. If the cutting height of the wire 5 is lowered or the wire diameter of the contact wire 5 welded onto the weight 3 is increased, it may not be possible to cut it properly or it will be difficult to cut, so the thickness of the contact material 5a' should be made thinner. I couldn't do it. The present invention was developed in view of the above circumstances, and it is possible to improve productivity and automate the welding process only once, and also to save expensive precious metals by making the contact material on the weight thinner. It is an object of the present invention to provide a method for manufacturing a mechanical governor movable contact for a micromotor, which has high contact reliability. An example of the method for manufacturing a mechanical governor movable contact for a micromotor according to the present invention will be explained with reference to the drawings. As shown in FIG. A groove 11 is provided, and a contact strip 12 is inserted into the groove 11 as shown in FIG. 3b.
are fitted and rolled and crimped, and then this composite strip 13 is cut in a direction perpendicular to the longitudinal direction of the composite strip 13, as shown in FIG.
Next, a spring material 1 is attached to the surface of the cut piece 14 on the contact surface side at a distance from the contact material 12a as shown in FIG. 3d.
A mechanical governor movable contact 16 for a micromotor is obtained by welding one end of the spring material 15 such that the longitudinal direction of the spring material 15 is perpendicular to the rolled and crimped contact material 12a. As described above, in the method of manufacturing a mechanical governor movable contact for a micromotor according to the present invention, the weight band material 10 and the contact band material 12 are integrated by rolling crimping, so that the thickness ratio of the weight and contact material and the rolling By appropriately setting the processing rate, the thickness of the contact material can be significantly reduced. Therefore, unlike conventional manufacturing methods, the welding of the contact material may be incomplete, the surface of the contact material may become spherical, the center of the contact material may be dented, burrs or dust may occur around the contact material, or There is no possibility that the contact material will crack or that cut marks (broken surfaces) or unevenness will remain on the surface of the contact material. In addition, in the method of manufacturing a mechanical governor movable contact for a micromotor of the present invention, the time-consuming welding process is only one time of welding the weight and the spring material, and two of the contact material and the spring material and the weight and the spring material are welded together. Since multiple welding steps are not required, productivity is significantly improved and automation is easy. Moreover, since the composite strip material is simply cut,
There is no generation of composite strip material waste or defective products. Next, in order to clarify the effects of the method of manufacturing a mechanical governor movable contact for a micromotor according to the present invention, specific examples and conventional examples thereof will be described. Embodiment 1 As shown in Figure 3a, the width is 7.5 mm wide and 2.5 mm thick in the longitudinal direction of one side of the top surface of a weight band 10 made of rolled brass at a position 1 mm apart from one side edge. 1.5
A shallow groove 11 with a flat rectangular cross section of 0.2 mm in depth is provided in the groove 11, and the width is as shown in Fig. 3b.
A contact strip material 12 made of 10% by weight Pd-Ru (hereinafter referred to as "w/o") with a width of 1.5 mm and a depth of 0.3 mm is fitted and rolled and crimped to form a weight with a width of 8 mm and a thickness of 2.3 mm. A composite strip material 13 having a contact strip material 12 with a width of 1.5 mm and a thickness of 0.3 mm integrally is formed in a concave groove 11 on one side of the upper surface at a position 1 mm apart from one edge of the strip material 10, and then The width of this composite strip 13 is 2.3 mm in the longitudinal direction and the perpendicular direction, as shown in FIG. 3c, so that the contact points are approximately square.
mm, and then on the top surface of this cut piece 14 a third
As shown in Figure d, a spring material 15 made of BeCu with a length of 11.5 mm and a thickness of 0.2 mm is spaced 1 mm from the contact material 12a.
One side was welded over a length of 4.5 mm to obtain a mechanical governor movable contact 16 for a micromotor. Example 2 As shown in Figure 3a, a Cu-
Width in the longitudinal direction of one side of the upper surface of the weight band material 10 made of Ni30w/o, 1 mm apart from the edge of one side.
Shallow groove 11 with flat square cross section of 1.5mm and depth 0.2mm
In this concave groove 11, a width is provided as shown in FIG. 3b.
1.5mm, thickness 0.3mm Ag-Pd40w/o-Cu30w/
The contact strip material 12 consisting of the contact strip material 12 is fitted and top rolled and crimped, and the width is 8 mm and the thickness is 2.3 mm. A composite strip material 13 having a contact strip material 12 with a width of 1.5 mm and a thickness of 0.3 mm is formed into one piece, and then this composite strip material 1 is molded.
3 is cut into a width of 2.3 mm in the longitudinal direction and perpendicular direction as shown in FIG. 3 c, so that the contact point is approximately square, and then 1 mm from the contact material 12 a is cut on the upper surface of this cut piece 14 as shown in FIG. 3 d. 11.5mm long and thick
The length of one side of the spring material 15 made of 0.2 mm BeCu
A mechanical governor movable contact 16 for a micromotor was obtained by welding over 4.5 mm. Conventional example 1 As shown in Figure 1a, Pd-Ru10w/with a thickness of 0.1 mm
The contact plate material 1 consisting of o is pressed out and the diameter is
A contact material 2 with a 0.7 mm circular ring projection 2a is made, and then this is attached to a weight 3 made of Cu-Ni30w/o with a thickness of 2.3 mm, a length of 8 mm, and 2.3 mm, as shown in Fig. 1b. Projection welding is performed on the center of the upper surface at a distance of 1 mm from one end edge, and then a piece of 11.5 mm in length and 0.2 mm in thickness is attached to the upper surface of the weight 3 at a distance of 1 mm from the contact material 2, as shown in Figure 1c. One side of the spring material 4 made of BeCu was welded over a length of 4.5 mm to obtain a movable contact for a mechanical governor for a micromotor. Conventional example 2 As shown in Figure 2a, Pd-Ru10w/with a thickness of 0.7 mm
The contact wire 5 consisting of o has a thickness of 2.3 mm, a length of 8 mm,
A weight 3 made of rolled brass with a width of 2.3 mm is welded to the center of the upper surface at a position 1.5 mm away from one end edge, and then the contact wire 5 is welded to the second wire at a height of 0.6 mm.
The contact material 5a left uncut on the weight 3 is then press-formed as shown in FIG.
A disc-shaped contact material 5a' with a thickness of 0.1 mm is formed, and then a disc-shaped contact material 5a' with a length of 11.5 mm and a thickness of 0.2mm
One side of the spring material 4 made of BeCu was welded over a length of 4.5 mm to obtain a movable contact for a mechanical governor for a micromotor. However, when we inspected the welding condition, shape, surface condition, etc. of the contact material on the weight for each of 100 mechanical governor movable contacts for micro motors of Examples 1 and 2 and Conventional Examples 1 and 2, the following table shows the results. We obtained the results shown below.
【表】
上記の表で明らかなように実施例１、２のマイ
クロモータ用機械式ガバナ可動接点は、従来例
１、２のそれに比べ接点材の厚さが薄くとも全く
不良品が生じないことが判る。
以上詳記した通り本発明のマイクロモータ用機
械式ガバナ可動接点の製造方法は、重錘用帯材と
接点帯材とを圧延圧着により一体化するので、従
来のように溶接不完全、接点表面の円弧状突出、
接点中央部のへこみ、接点周縁のちり、ばり、接
点割れ、接点表面の切断痕残留、接点表面の凹凸
等を発生させないで、接点材の厚さを大幅に薄く
することができて、高価な貴金属を節約できる。
また甚だ手間〓のかかる溶接工程が重錘とばね
材との溶接だけであるので、生産性が著しく向上
し、自動化も容易で、しかも複合帯材の屑や不良
品の発生もない等の効果がある。
さらに本発明の製造方法によれば、接点材の表
面積の広いガバナ可動接点が得られるので、固定
接点との位置合わせが容易であり、また接触の信
頼性が向上する等の二次的効果を奏する。[Table] As is clear from the table above, the micromotor mechanical governor movable contacts of Examples 1 and 2 do not produce any defective products even though the thickness of the contact material is thinner than that of conventional examples 1 and 2. I understand. As described in detail above, in the method of manufacturing a mechanical governor movable contact for a micromotor according to the present invention, the weight band material and the contact band material are integrated by rolling and crimping. arcuate protrusion,
The thickness of the contact material can be significantly reduced without causing dents in the center of the contact, dust, burrs, cracks in the contact, residual cut marks on the contact surface, unevenness on the contact surface, etc., and eliminates the need for expensive contact materials. You can save precious metals. In addition, since the only welding process that takes a lot of time is the welding of the weight and the spring material, productivity is significantly improved, automation is easy, and there is no generation of composite strip material waste or defective products. There is. Furthermore, according to the manufacturing method of the present invention, a movable governor contact with a large surface area of the contact material can be obtained, which facilitates alignment with a fixed contact, and has secondary effects such as improved contact reliability. play.
第１図ａ乃至ｃは従来のマイクロモータ用機械
式ガバナ可動接点の製造方法の工程を示す図、第
２図ａ乃至ｄは同じく従来のマイクロモータ用機
械式ガバナ可動接点の製造方法の工程を示す図、
第３図ａ乃至ｄは本発明のマイクロモータ用機械
式ガバナ可動接点の製造方法の工程を示す図であ
る。
１０……重錘用帯材、１１……凹溝、１２……
接点帯材、１２ａ……接点材、１３……複合帯
材、１４……切断片、１５……ばね材、１６……
マイクロモータ用機械式ガバナ可動接点。
1A to 1C are diagrams showing the steps of a conventional method for manufacturing a mechanical governor movable contact for a micromotor, and FIGS. 2A to 2D are diagrams showing the steps of a conventional method for manufacturing a mechanical governor movable contact for a micromotor. The figure shown,
FIGS. 3a to 3d are diagrams showing the steps of the method for manufacturing a mechanical governor movable contact for a micromotor according to the present invention. 10... Band material for weight, 11... Concave groove, 12...
Contact strip material, 12a...Contact material, 13...Composite strip material, 14...Cut piece, 15...Spring material, 16...
Mechanical governor movable contacts for micro motors.
Claims (1)
角形断面の浅い凹溝１１を設けてこの凹溝１１内
に接点帯材１２を嵌合の上圧延圧着し、次にこの
複合帯材１３を接点が略正方形となるように長手
方向と直角方向に切断し、次いでこの切断片１４
の接点面側の表面に接点材１２ａから離隔してば
ね材１５の長手方向が圧延圧着された接点材１２
ａと直角方向となるように溶接することを特徴と
するマイクロモータ用機械式ガバナ可動接点の製
造方法。1. A shallow groove 11 with a flat rectangular cross section is provided in the longitudinal direction of one side of the upper surface of the weight band material 10, and the contact band material 12 is fitted into this groove 11 and then rolled and crimped, and then this composite band is The material 13 is cut in a direction perpendicular to the longitudinal direction so that the contact points are approximately square, and then this cut piece 14 is
A contact material 12 having a longitudinal direction of a spring material 15 rolled and crimped on the contact surface side surface of the contact material 12a at a distance from the contact material 12a.
A method for manufacturing a mechanical governor movable contact for a micromotor, the method comprising welding in a direction perpendicular to a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7745380A JPS573316A (en) | 1980-06-09 | 1980-06-09 | Method of manufacturing governor movable contact for micromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7745380A JPS573316A (en) | 1980-06-09 | 1980-06-09 | Method of manufacturing governor movable contact for micromotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS573316A JPS573316A (en) | 1982-01-08 |
| JPH0227763B2 true JPH0227763B2 (en) | 1990-06-19 |
Family
ID=13634426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7745380A Granted JPS573316A (en) | 1980-06-09 | 1980-06-09 | Method of manufacturing governor movable contact for micromotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS573316A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108885953B (en) | 2016-04-01 | 2019-10-25 | 打矢恒温器株式会社 | The manufacturing method of electric contact |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5349482Y2 (en) * | 1973-03-30 | 1978-11-28 |
-
1980
- 1980-06-09 JP JP7745380A patent/JPS573316A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS573316A (en) | 1982-01-08 |
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