JPS6037577B2 - electromagnetic relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Kaniji relay having a new structure, and its purpose is to provide a direct current type relay by simply changing the mounting structure of the electromagnet and adding a small number of sections. To provide an electromagnetic relay which can be changed to an AC type and has characteristics adapted to each attraction characteristic.

The present invention will be explained below with reference to drawings of embodiments.

The electromagnet 1 is constructed by inserting one leg 3a of a U-shaped laminated iron core 2 into a central hole 6 of a winding frame 5 around which a coil 4 is wound, and fixing the winding frame 5 to the leg 3a. . When constructing a direct current type electromagnetic relay, the electromagnet 1 is placed on the bottom of the 2-part container 6 with the other leg 3b facing downward, as shown in FIG. Reference numeral 7 in the figure is a rectangular movable iron piece with a projecting piece 7a protruding from the upper center end. It is inserted into a compartment 8 provided in the upper part of the body 6 so as to be movable back and forth.
A movable frame 9 is housed in the compartment 8 so as to be slidable back and forth.
A spring body 10 is compressed between the rear end of the corner chamber 8 and the rear end of the movable frame 9 to constantly bias the movable frame 9 forward. A notch 11 is bored in the lower front end of the movable frame 9, and the projecting piece 7a of the movable iron piece 7 is engaged with this notch 11, and the movable iron piece 7 moves backward or forward in response to the adsorption/separation operation of the movable iron piece 7. The movable frame 9 is driven. Further, square window holes 12 are formed in the rear and center portions of the movable frame 9, respectively, and movable contact plates 13 are provided in these window holes 12 with side ends protruding toward the sides of the movable frame 9. The front end of the window hole 12 and the movable bush point plate 1 are provided so as to be movable in the front and rear directions within the window hole 12
It is biased rearward by a compression spring 14 which is compressed between the rear surface of the housing and the rear surface of the housing. Movable contacts 15 are provided on the rear surfaces of the outwardly projecting side ends of the movable contact plates 13, respectively, and these movable contacts 15 are provided with tips of terminal plates 16 which are inserted into the compartment 8 from outside from above. Fixed contact 17 that can be installed on the front
are arranged opposite to each other so that they can be freely contacted and separated. In the figure, 18 is a power supply terminal connected to the coil 4 via a lead wire 19. In the partition wall of the two-way corner room 8, a cutout or the like is formed at a portion where the projecting piece 7a of the movable iron piece 7 moves, so that it can of course be moved.

When the magnet is not energized, the movable frame 9 is moved forward by the biasing force of the spring body 10, and the movable iron piece 7 is rotated forward about its lower end as shown by the broken line. , 3b. Further, at this time, the movable contacts 15 of the movable contact plate 13 are in a state separated from the fixed contacts 17, respectively. Next, when the coil 4 is energized, the movable iron pieces 7 push the movable frame 9 rearward against the biasing force of the spring body 10 as shown in the figure due to the attractive force of the electromagnet 1, and extend rearward to face each other. It is attracted to the end faces of the legs 3a and 3b of the iron core 2. At this time, the fixed contact 17 is the movable contact 1
5, and contact pressure is obtained by the spring force of the compression spring 14. In the case of direct current, if the iron core stroke becomes large, the attraction force becomes extremely small, but in this embodiment, it is determined by the distance between the upper leg 3a of the iron core 2 and the movable iron piece 7 in the non-excited state. The iron core stroke is determined, and in this case, it can be reduced to about 1/2 of the required stroke of the movable frame 9, and a predetermined suction force can be obtained.
The figure shows the relationship between the suction force and the iron core stroke, A shows the DC suction force, and the mouth shows the AC suction force. The core stroke B is large. FIG. 4 shows an embodiment of an AC type, and in such an embodiment, a mating groove 2 is provided at the end of one leg 3b of the iron core 2 of the electromagnet 1 shown in FIG.
An alternating current electromagnet is constructed by winding a shaded coil 22 around the electromagnet 1, and this electromagnet 1 is used. By the way, in the case of an AC electromagnet, the attraction force of the iron core is small, so the attraction force of the electromagnet 1 is smaller than the repulsion force (the contact pressure between the movable contact 15 and the fixed contact 17, the urging force of the spring body 10 for holding down). If they are the same, it is desirable to reduce the lever ratio of the movable iron piece 7, so that the difference between the attraction voltage and the open voltage can be made large. Therefore, as shown in the figure, the legs 3a of the iron core 2 of the electromagnet 1,
3b is reversed from the embodiment shown in FIG.
The end face of the leg 3a is made to face the center of the movable iron piece 7, and the end face of the leg 3b is made to face the upper part of the movable iron piece 7, and the iron core stroke is set to be approximately equal to the stroke of the movable frame 9. be. If alternating current is supplied to the coil 2, the same operation as in the embodiment shown in FIG. 2 will be performed. Since the present invention is configured as described above, it is possible to manufacture AC and DC type dew relays by changing the mounting state of the electromagnet and simply by installing or not installing a cutout coil. In the DC type, the specified attraction force is obtained by reducing the iron core stroke of the electromagnet, and in the AC type, the iron core stroke is increased to reduce the lever ratio of the movable iron piece, thereby reducing the difference between the attraction voltage and the open voltage. Since it can be made larger and most of the parts can be shared, it has the effect of reducing costs and making inventory management easier.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is a front view of the vessel in a divided state, Fig. 3 is an explanatory diagram of the iron core stroke of the electromagnet, and Fig. 4 is the main body. It is a front view of a divided state of the container body of another embodiment of the invention, in which 1 is an electromagnet, 2 is an iron core, 3a and 3b are legs, 4 is a coil, 7 is a movable iron piece, 9 is a movable frame, and 10 is a spring. body, 12 is a perforation, 13 is a movable contact plate,
14 is a compression spring, 15 is a movable contact, 17 is a fixed contact, 2
2 is a shaded coil. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. An electromagnet with an excitation coil wound around one leg of a U-shaped iron core, and an electromagnet that is placed opposite to both legs of the iron core and can be freely attracted to and removed from the end surfaces of both legs of the iron core around the lower end. A movable iron piece that rotates,
A movable frame that is arranged above the electromagnet and engages the upper end of the movable iron piece with the lower part and is spring-biased in the direction of detachment of the movable iron piece; A movable contact plate is attached to the movable contact plate, which is biased by a spring in the opposite direction of the movable frame, and is mounted so as to be able to move back and forth. It is characterized by comprising fixed contacts arranged so as to be freely separable, and the end surfaces of the upper and lower legs of the iron core of the electromagnet are selectively opposed to the center, lower part, or upper, center of the movable iron plate. Electromagnetic relay. 2 Place the legs of the iron core wrapped with coils on the upper side, and place the lower part of the legs of the lower iron core and the lower end of the movable iron plate on the same plane, so that the central and lower parts of the movable iron plate are 2. The electromagnetic relay according to claim 1, wherein the upper and lower leg end surfaces of the core are respectively opposed to each other. 3 Place the legs of the iron core wrapped with the coil on the lower side, place the lower part of the coil and the lower end of the movable iron plate on the same plane, and place the legs above the iron core.
2. The electromagnetic relay according to claim 1, wherein the end surfaces of the lower legs face the upper and center portions of the movable iron plate, respectively, and a shaded coil is attached to the upper leg of the iron core.