JPH0313708U

JPH0313708U -

Info

Publication number: JPH0313708U
Application number: JP7531789U
Authority: JP
Priority date: 1989-06-27
Filing date: 1989-06-27
Publication date: 1991-02-12
Anticipated expiration: 2004-06-27
Also published as: JPH082967Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の断面図、第２図は
他の実施例の断面図、第３図は同上の要部の分解
斜視図、第４図はさらに他の実施例の断面図、第
５図は同上の磁気抵抗の軽減作用の説明図、第６
図及び第７図は夫々従来例の断面図である。１は可動鉄心、２は固定鉄心、２ａは細径部、
２ｂは小径部、３は第１のヨーク、４は第２のヨ
ーク、５はコイルボビン、６はコイル、７は弾性
体、８は補助ヨーク、８ａ，８ｂは補助ヨーク片
、１０は貫通孔、１１は挿通孔、１２は段部、１
３は切欠である。 Fig. 1 is a sectional view of one embodiment of the present invention, Fig. 2 is a sectional view of another embodiment, Fig. 3 is an exploded perspective view of the main parts of the same, and Fig. 4 is a sectional view of yet another embodiment. Figure 5 is an explanatory diagram of the magnetic resistance reduction effect of the same as above, and Figure 6 is
7 and 7 are sectional views of conventional examples, respectively. 1 is a movable core, 2 is a fixed core, 2a is a small diameter part,
2b is a small diameter portion, 3 is a first yoke, 4 is a second yoke, 5 is a coil bobbin, 6 is a coil, 7 is an elastic body, 8 is an auxiliary yoke, 8a and 8b are auxiliary yoke pieces, 10 is a through hole, 11 is an insertion hole, 12 is a stepped portion, 1
3 is a notch.

Claims

[Claims for Utility Model Registration] (1) A coil bobbin wound with a coil, a first yoke with a bottomed cylindrical shape that houses the coil bobbin and is closed on one side, and covers the opening surface of the first yoke. A second yoke is attached to the coil bobbin, a movable core is inserted into the through hole of the coil bobbin through the second yoke, and the movable core is inserted into the through hole of the coil bobbin at one end. a fixed iron core that is attached from the opposite side, the other end of the fixed iron core is formed to have an outer diameter smaller than that of the one end, and an insertion hole through which the other end of the fixed iron core is inserted is formed in the first yoke. An elastic body is interposed between the narrow-diameter neck of the fixed core and the first yoke, and a stepped portion that restricts movement of the fixed core toward the movable core by the elastic body is attached to the coil bobbin. An insertion hole is formed in the inner wall of the through hole, and has an inner diameter that is approximately the same as the outer diameter of the fixed core through which one end of the fixed core is inserted, and the auxiliary core is inserted between the coil bobbin and the first yoke. A solenoid comprising a yoke. (2) A coil bobbin wound with a coil, a first yoke in the form of a cylinder with a closed end and housing the coil bobbin, and a second yoke attached to cover the opening surface of the first yoke. a yoke, a movable core that penetrates the second yoke and is inserted into the through hole of the coil bobbin so as to be freely retractable; and a fixed core that has one end installed in the through hole of the coil bobbin from the opposite side to the movable core. forming an insertion hole in a first yoke through which the other end of the fixed iron core is inserted, and a portion inserted into the insertion hole of the first yoke;
The part between the part to be inserted into the through hole of the coil bobbin is formed to have a small diameter, and a semicircular notch into which the small diameter part of the fixed iron core fits is formed in the center of each one side part. This auxiliary yoke is attached to the first yoke side, and there is an elastic force between the auxiliary yoke piece and the upper end surface of the small diameter part of the fixed iron core and the collar of the coil bobbin. A solenoid with a sandwiched body. (3) The solenoid according to claim 2, wherein the auxiliary yoke is attached to the coil bobbin side, and an elastic body is sandwiched between the auxiliary yoke and the first yoke.