JPS61143918A - Relay - Google Patents

Abstract

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

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a relay.

(Summary of the Invention) The present invention is a relay that displaces two opposing movable contact pieces so as to approach each other in conjunction with a movable iron piece, thereby obtaining a large contact spacing for a predetermined stroke of the movable iron piece. .

(Prior Art) Conventionally, in a relay that opens and closes a contact using a movable contact piece attached to a movable iron piece, only the movable contact piece moves relative to a fixed contact to open and close the contact.

(Problems to be Solved by the Invention) By the way, in order to open and close a large load in a relay, it is necessary to increase the distance between the contacts in consideration of the withstand voltage characteristics between the contacts.

However, if the contact spacing is increased in a conventional relay,
The distance (stroke) between the movable iron piece and the iron core inevitably becomes large, which poses a problem in that the current or the number of turns of the coil must be increased.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the relay according to the present invention has the fixed contact piece in the conventional relay attached to the electromagnet side of the movable iron piece through an insulating material, and the second movable iron piece is attached to the electromagnet side of the movable iron piece. The intermediate portion of the second movable contact piece is supported by a fulcrum located on the opposite side of the main movable contact piece.

(Example) In FIGS. 1 and 2, M is an electromagnet, which consists of a coil 2 wound around a spool 1 and an iron core 3, and a movable iron piece 5 is attached to a yoke 4 integrated with the iron core 3. Hinged by means. One end of the movable iron piece 5 is engaged with a spring 6 provided on the yoke 4, and the movable iron piece 5 is normally spaced apart from the top of the iron core 3.

Further, this movable iron piece 5 is provided with a main movable contact piece 8 having a contact point 9 at its tip via an insulating stand 7, while a main movable contact piece 8 having a contact point 12 at its tip via an insulating material 13 is also provided at the tip of the movable iron piece 5. A second movable contact piece 10 is attached substantially parallel to the main movable contact piece 8. Furthermore, a fulcrum 14 consisting of a protrusion is provided at the tip of the upper flange of the spool 1, and is located approximately in the center of the second movable contact piece 10. part is supported.

In the embodiment, a small projection 15 is provided on the fulcrum 14, and this small projection 15 connects to the through hole 11 provided in the second movable contact piece 10.
This is to prevent the second movable contact piece 10 from being displaced in the lateral direction.

In addition, 16 is a terminal block, 17m, 17b, 17c, 17
d is a terminal.

(Function) Because of the above configuration, when the electromagnet M is not energized, a predetermined distance is maintained between the contacts 9 and 12 as shown in the figure. Then, when the electromagnet M is excited, the movable iron piece 5
rotates about the yoke 4 as the fulcrum E, but in this case, the first
As shown in the figure, since the second movable contact piece 10 is supported at its center by a fulcrum 14, as the movable iron piece 5 rotates, its contact 12 rotates in the opposite direction due to the scene motion.

In other words, due to the rotation of the movable iron piece 5, the main movable contact piece 8 and the second
The contacts 9 and 12 of the movable contact piece 10 are close to each other.
, 12 will be closed.

Note that when the electromagnet M is demagnetized, it returns to its original state and the contacts open.

In the embodiment described above, the fulcrum 14 supporting the center portion of the second movable contact piece 10 was provided on the spool 1, but the fulcrum 14 is not limited to this, and various methods such as providing the fulcrum 14 from the terminal block 16 can be adopted. Also,! The @2 movable contact piece 10 may be attached to the insulating stand 7 together with the main movable contact piece 8.

(Effects of the Invention) As is clear from the above description, according to the present invention, not only the (main) movable contact piece but also the second movable contact piece, which is a conventional fixed contact piece, can be moved in conjunction with the movable iron piece. Since the movable iron piece is displaced toward the contact piece, a large contact distance can be obtained even if the stroke of the movable iron piece is made smaller than that of the conventional one.

On the other hand, the attraction force of an electromagnet is inversely proportional to the square of the stroke of the movable iron piece, so it is possible to maintain a large contact distance without increasing the current or the number of turns of the coil, making it possible to create a relay that is smaller and cheaper. It ends with

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the basic concept of the present invention, Fig. 2 is a front view showing an embodiment of the relay according to the invention, and Fig. 3 is a perspective view showing details of the support part of the movable contact piece. be. M...Electromagnet, 1...Spool, 3...
Iron core, 4... Yoke, 5... Movable iron piece, 7
...Insulation stand, 8...(Main) movable contact piece, 9,
12... Contact, 10... Second movable contact piece,
13...Insulation stand, 14 river fulcrum. Patent applicant: Tateishi Electric Co., Ltd. Agent
Patent Attorney Blue and White 2 idiots 1st rIA 2nd rIA 3 foils

Claims (3)

[Claims] (1) In a relay that opens and closes contacts with a movable contact piece attached to a movable iron piece via an insulating stand by displacement of the movable iron piece based on the excitation of an electromagnet, the movable iron piece is opposite to the contact of the movable contact piece. A second movable contact piece having a contact point is provided on the electromagnet side via an insulating material, and an intermediate portion of the second movable contact piece is supported by a fulcrum located on the opposite side of the movable contact piece. relay. (2) The relay according to claim 1, wherein the insulating material is a common insulating stand attached to a movable iron piece. (3) The relay according to claim 1 or 2, wherein the fulcrum is formed on a spool of an electromagnet.