摘要:
This low profile electromagnetic relay includes a base and a support post protruding at one end of the base. An electromagnet assembly is mounted in a generally central position on the base, and has a pair of magnetic pole surfaces on opposite sides of its one end. An armature assembly includes an insulating armature member, shaped generally as a hollow rectangular member with an open space being defined within it and formed with a hole by which it is rotatably fitted over the support post with the electromagnet assembly fitting inside the open space defined within it. A drive portion is connected to the insulating armature member. A pair of mutually opposed armature pieces are mounted on the insulating armature member, and, when the insulating armature member is rotatably fitted over the support post, lie on opposite sides of the one end of the electromagnet assembly and each oppose one of the magnetic pole surfaces of the electromagnet assembly. A permanent magnet member is mounted so as to bridge between the pair of mutually opposed armature pieces. And a contact mechanism is fitted to the base and is driven by the drive portion of the insulating armature member. Thereby the height of the relay is minimized, and the stability of its action is assured.
摘要:
In this mounting structure and method for a surface mounted type electronic component, the component has at least one terminal which protrudes from its bottom surface and which terminates in a foot portion for being soldered to a printed circuit board. Also, a projection extends from this bottom surface of the electronic component for a distance somewhat less than the amounty by which the terminal projects from it. This projection is provisionally secured by adhesive to the printed circuit board with the foot portion of the terminal overlaying that circuit portion to which it is to be soldered, and then subsequently this terminal foot portion is soldered to this circuit portion. Thereby, during the soldering process, there is no risk of the terminal foot portion becoming displaced from the circuit portion and thus badly soldered thereto, because of the locating action of the adhered projection. The projection may extend from a central portion of the bottom surface of the component, or may be provided in plurality as extending from central portions of edges of said bottom surface. And the end of the projection may be roughened.
摘要:
An electromagnetic relay comprising a fixed end terminal piece including a main part, a narrowed portion extending therefrom, and a relatively broader mounting portion formed at a free end of the narrowed portion and carrying a fixed contact thereon. Since a strong magnetic field in generated by the concentration of electric current in the narrowed portion, and an electric arc generated across the contacts is subjected to a corresponding electromagnetic force according to Fleming's left-hand rule, the arc is either eliminated or deflected from the shortest path between the two contacts, and the welding together of the two contacts is effectively prevented. Also, the durability of the contacts is substantially improved through deflection or elimination of the arc.
摘要:
A relay terminal includes a plurality of relays, a connector for entering control signals to control the relays and outputting contact inputs from their relay contacts, and a terminal block corresponding to the input and output signals of the relays, which are held as a single unit. The holding construction of the plurality of relays and the terminal block employs a two step overlapping holding construction in which the relays are held in an upper step and the terminal block is held in a lower step, resulting in a reduction in the width of the relay terminal and an increase in a package density when the relay terminal is mounted on a vertical installation wall within a control panel.
摘要:
An interface device which is provided with a DC-DC converter and a power output terminal so that the internal circuit of the interface device and the external equipment may share a common power source in spite of their different power supply requirements, and the wiring connection between the interface device and the external equipment may be simplified. In particular, if the interface device is configured as a terminal base and coupled to the controller via serial transmission line, a significant simplification of the wiring between different parts of the controller system can be accomplished. If the power terminals include positive and negative power output terminals arranged in an alternating fashion, and the power terminals and the signal lead terminals are arranged in two different rows, preferably, in staggered relationship, the leads from different pieces of external equipment may be clustered close to each other, and the external wiring work is extremely simplified. This contributes to the elimination of wiring errors and the reduction in the cost of installing and controller system.
摘要:
An electromagnetic relay has a core and yoke that are securely attached to the base of the relay with a high degree of precision so that the operating characteristics of the relay do not vary. To this end, two bosses are provided near the lower edge on the inner surface of a hole in a spool of the relay. The bosses are symmetrical with respect to a center line of the spool.
摘要:
In a connection arrangement between a multi connecting terminal type transmission unit and a control unit, a transmission side connector portion and an apparatus side connector portion in each of which a plurality of terminals as many as the number of information signals to be transmitted are collectively formed are respectively provided for the multi connecting terminal type transmission unit and the control unit. Both of these connector portions are attachably and detachably connected to each other. With this connection arrangement, by connecting the connector portions on the transmission and apparatus sides, the multi connecting terminal type transmission unit and the control unit are connected.
摘要:
In an electromagnetic relay having a movable piece (30) supported so as to be free to oscillate, an electromagnet block (20) for attracting and oscillatingly displacing the movable piece by being excited, a contact mechanism having a movable contactor (53) and a fixed contactor (51, 52), a slide card (60) connecting a free end of the movable piece and the movable contactor, and a housing comprising a base (10) and a case (70), a supporting projection (71) is formed on the inner surface of the case (70) and the projection comes into abutting contact with the upper surface of a frame (11) of the base, thereby assuring a space within which the slide card may move. The slide card is formed to have a hole (61) so that the card will avoid the supporting projection.
摘要:
An electromagnetic relay which is small in size, low in power consumption, high in productivity, and long in service life and which operates with high accuracy. The electromagnetic relay in which the electromagnet is energized and deenergized to swing its armature to drive a slide card, and a movable contact piece forming a contact mechanism is swung by the card, wherein a small gap is formed between the movable contact piece and a part of an end of the card, when the card is returned.