JPS6215719U - - Google Patents

Description

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of this invention,
Figure 1 is a front view of the main part, Figure 2 is a partial front view, and Figure 3 is a front view of the main part.
The drawings are a plan view of the device shown in FIG. 2, FIG. 4 is a front view of essential parts in an operating state, FIG. 5 is a front view, and FIG. 6 is a plan view of the device shown in FIG. Figures 7 to 9 show a conventional locking device for a switch. Figure 7 is a front view of the main parts, Figure 8 is a partially sectional side view of how it is used, and Figure 9 is a part of how it operates. FIG. 11a, 11b...interlock lever, 12
a, 12b... Rotating shaft, 13a, 13b... Sliding surface, 14a, 14b... Guide surface, 15a, 15b
...Lever pin. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claim for Utility Model Registration] A pair of interlock levers each having a lever pin that engages with a rotating shaft and a movable member of a switch, is arranged symmetrically, and is given a return rotational force by a return spring. A locking device for a switch that prevents simultaneous closing of a pair of switches, comprising: a sliding surface that is an arcuate surface centered on the rotating shaft and formed directly above the rotating shaft; A locking device for a switch, characterized in that the interlock lever is provided with a guide surface formed of an arcuate surface extending obliquely upward from the vicinity of the lever pin with the rotation axis as the center.