JPS58106843U - Recovery method switching device for thermal overload relays - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a thermal overload relay equipped with an embodiment of a switching device, Fig. 2 is an enlarged perspective view of the main parts of a conventional relay box, a return rod, and a switching plate; Figures 3A and 3B are cross-sectional views of a conventional relay box, return rod, and switching plate combined in a manual return state, viewed from different directions, and Figures 4A and B are sectional views of a conventional relay box and , sectional views of the return rod and switching plate combined and brought into an automatic return state, respectively viewed from different directions; FIG. 5 is an enlarged perspective view of the main parts of the relay box, the return rod and the switching plate according to the present invention; Figure 6 is a partial perspective view of the cover showing one embodiment of the stopper provided on the cover, and Figures 7A and B are external views of the various members shown in Figure 5 assembled and in manual return mode, viewed from different directions. FIG. 2 is a diagram and a sectional view. 5: Plate spring for movable contact, 7: Return rod, 7a: Notch part of return rod, 7C: Operation part of return rod, 9: Switching plate, 9a: Wedge-shaped protrusion for engagement, 9d: Switching protrusion , 10: Relay box body, 10a: Engagement groove of box body, 10b: Step part of box body, 10C
: Vertical groove of box body, 1-3: Cover, 13a: Switching window of cover, 13b: Stopper of switching window.

Claims (1)

[Scope of utility model registration request] Thermal type overload relay is slidably guided in the longitudinal direction by a groove provided in the box body, and is held in a fixed position within the groove by spring bias, and after the relay contact operates, it is operated by pushing the leaf spring for the movable contact. The return rod has an operating part at one end for returning to the previous state, and a protrusion that is housed in a notch of the return rod with play in the movement direction and protrudes into the switching window of the cover that closes the groove. In a return method switching device equipped with a switching plate that changes from a manual return type to an automatic return type by moving a fixed position, a breakable stopper is provided in the switching window to operate the switching plate to the automatic return position. 1. A return method switching device for a thermal overload relay, characterized in that the stopper is broken and the switching plate can be operated to an automatic return position by the protrusion.