【図面の簡単な説明】[Brief explanation of drawings]  第1図および第2図はこの考案の一実施例を示
す概略断面図で、第1図はオン状態を示し、第2
図はオフ状態を示す。第3図および第4図はこの
考案の他の実施例の要部を示す概略断面図で、第
3図は正面図、第4図は側面図である。第5図は
この考案の更に他の実施例を構成するためのねじ
の形状を示す概略図、第6図および第7図は従来
の構成を示す概略断面図で第6図はオン状態を示
し、第7図はオフ状態を示す。第8図は従来装置
における端子間接触抵抗を示す等価回路図、第9
図は同じくこの考案の一実施例における端子間接
触抵抗を示す等価回路図である。図中1は絶縁ケ
ース、3A,3Bは端子、4は接続電線、7A,
7Bは固定接触子、8はストツパ、9A,9Bは
圧縮ばね、10は軸、11は絶縁ロータ、13は
可動接触子、14A,14Bは接続片、20A,
20Bは壁部、21A,21Bはねじ、22A,
22Bはガイドである。なお、同一符号はそれぞ
れ同一または相当部分を示す。  1 and 2 are schematic cross-sectional views showing one embodiment of this invention, where FIG. 1 shows the on state and the second
 The figure shows the off state. 3 and 4 are schematic cross-sectional views showing essential parts of other embodiments of the invention, with FIG. 3 being a front view and FIG. 4 being a side view. Fig. 5 is a schematic diagram showing the shape of a screw for configuring yet another embodiment of this invention, Figs. 6 and 7 are schematic sectional views showing the conventional configuration, and Fig. 6 shows the on state. , FIG. 7 shows the off state. Figure 8 is an equivalent circuit diagram showing the contact resistance between terminals in a conventional device;
 The figure is also an equivalent circuit diagram showing the contact resistance between terminals in an embodiment of this invention. In the figure, 1 is an insulating case, 3A, 3B are terminals, 4 is a connecting wire, 7A,
 7B is a fixed contact, 8 is a stopper, 9A, 9B are compression springs, 10 is a shaft, 11 is an insulated rotor, 13 is a movable contact, 14A, 14B are connection pieces, 20A,
 20B is a wall part, 21A, 21B are screws, 22A,
 22B is a guide. Note that the same reference numerals indicate the same or corresponding parts.