JPH01236535A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To prevent ill influence of the electric magnet device side and contact mechanism side upon each other by supporting a resilient film, which separates the electric magnet device side from contact mechanism side in terms of space, at a case accommodating the electric magnet device side and the contact mechanism side. CONSTITUTION:A coupling pin 25 of a left terminal base 2a is pressure fitted in a pin receipt hole 26 of a right terminal base 2b to cause coupling of the two bases 2a, 2b, and thus a case is formed. Inside the case 11 is thus separated into the electric magnet device 10 side and contact mechanism 18 side by a resilient film 22, and two card pieces 19a, 19b are jointed through this resilient film 22. Even though nitric acid is going to transfer to the electric magnet device 10 side associate with arc generation at the opening and closing time of the contacts, the resilient film 22 hinders transfer from the contact mechanism 18 side to the electric magnet device 10 side. This eliminates ill influencing of the two sides upon each other.

Description

[Detailed description of the invention] <Field of invention> This invention relates to an electromagnetic relay.

<Prior art and issues> In general, in electromagnetic relays, an electromagnet device and a contact mechanism driven by the electromagnet are installed in the same space inside a synthetic resin case, so the contact mechanism can control the opening and closing of the contacts. There is a risk that the nitric acid generated during this process will enter the 7TF magnet device, accelerating the corrosion of the conductor wires that make up the coil, and scattering abrasion powder and carbon particles from the contact material, which may interfere with the mechanical operation of movable iron pieces, etc. be. There is also a risk that the heat generated by the arc on the contact side may adversely affect the operating characteristics of the coil, and that the outgas from the opposite coil may deteriorate the contactability of the contact.

<Purpose of the Invention> This invention was made to solve the above-mentioned problems of the conventional device, and can improve reliability by preventing the electromagnet device side and the contact mechanism side from having a negative influence on each other. °Aims to provide electromagnetic relays.

<Configuration and Effects of the Invention> The electromagnetic relay according to the present invention has a case in which an electromagnet device and a contact mechanism section driven to open and close by the electromagnet device are housed, and the electromagnet device side and the contact mechanism section side are spatially separated. It supports an elastic thin film body.

According to this invention, since the elastic thin film body that spatially separates the electromagnet device side and the contact mechanism side in the case is provided in the case, the electromagnet device side and the contact mechanism side are mutually protected from heat. It is no longer affected by the adverse effects of gas, etc., and proper operability can be maintained over a long period of time.

<Description of Embodiments> Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are schematic configuration diagrams showing an example of the electromagnetic relay according to the present invention in an assembled state fE and an unassembled state, respectively.

In the figure, ■ is a case, which consists of an electrically insulating synthetic resin terminal base 2 and an electrically insulating synthetic resin cover 3 fitted onto the terminal base 2. Above end, child
-The base 2 is attached to the left base part 2a and the right base part 2b.
The cover 3 has a divided configuration, and the cover 3 has a configuration in which it is divided into two parts, a left cover part 3a and a right cover part 3b. That is, the left terminal base part 2a and the left cover part 3a constitute a left case part 1a, and the right terminal base part 2b and the right cover part 3b constitute a right case part ib.

Reference numeral 4 denotes a yoke fixed to the upper surface of the left terminal base portion 2a, and a coil spool 7 around which a coil 6 is wound is fitted onto an iron core 5 fixed to the yoke 4. The yoke 4, coil 6, etc. constitute an electromagnet 8.

Reference numeral 9 denotes an L-shaped movable iron piece that is rotatably attached to the upper end of the yoke 4 and driven by the electromagnet 8. The adsorption piece part 9a faces the tip of the iron core 5, and is connected to the electromagnet 8. This constitutes an electromagnet device 10. 11 is a coil terminal fixed to the terminal base portion 2a.

Reference numerals 12 and 13 denote a normally closed and normally open fixed contact piece supported by the right terminal base portion 2b, respectively, and 14 a movable contact piece disposed between both fixed contact pieces 12 and 13 and supported by the right terminal base portion 2b. It is a contact piece. Both fixed contact pieces 12.
A normally closed fixed contact 15 and a normally open fixed contact 16 are fixed to each tip of the movable contact piece 13, and a movable contact 17 is fixed to the tip of the movable contact piece 14, respectively. These fixed contact pieces 12, 13, movable contact pieces 14, and each contact 15
, 16, 17, etc. constitute the contact mechanism section 18.

Reference numeral 19 denotes a card that transmits the displacement of the movable iron piece 9 to the movable contact piece 14, and this card 19 includes a card piece 19a on the electromagnet device 10 side and a card piece 19b on the contact mechanism section 18 side.
It is divided into two parts.

Wall portions 20 of the left and right power bar portions 3a and 3b that are joined to each other
A and 20b have card pieces 19a.

Openings 21a and 21b are formed corresponding to the openings 19b, and one of the openings 21b has a spatial connection between the electromagnet device IO side and the contact mechanism section 18 side in the case 1, as shown in FIG. It is closed with an elastic thin film body 22 made of rubber or the like that divides into sections. A fitting recess 23 and a fitting protrusion 24 are respectively formed on the opposing surfaces of the card pieces 19a and 19b. It is a good fit.

25.25 is a coupling pin protruding from the side surface of the left terminal base part 2a, and 26.26 is the right terminal base part 2.
This is a pin receiving hole formed on the side surface of b, into which the coupling pins 25 and 26 are press-fitted, and these pins 25 and pin receiving holes 26 connect both case parts 1a and lb. . Of course, other coupling structures can be used to connect both case parts 1a and lb.
may be combined.

Next, the operation of the above configuration will be explained.

By press-fitting the coupling pin 25° 25 of the left terminal base portion 2a into the pin receiving hole 26° 26 of the left terminal base portion 2b, both base portions 2a are assembled.

2b are combined, ie case l is constructed. As a result, the inside of the case l is divided by the elastic thin film body 22 into the electromagnet device 10 side and the contact mechanism section 18 side, and both card pieces 19a and 19b are further joined via the elastic thin film body 22.

When the coil 6 is energized, the excitation magnetic flux generates an attractive force at the upper end of the iron core 5, and the attracting piece 9a of the movable iron piece 9 is attracted. Therefore, the operating piece 9b of the movable iron piece 9 is connected to the card 1.
9, the movable contact piece 14 is driven to the right, the normally closed fixed contact 15 and the rif 9 contact 17 are opened, and the normally open fixed contact 16 and the 1F moving contact 17 are closed. . When the power to the coil 6 is cut off, the attractive force on the upper end surface of the iron core 5 disappears, and the movable iron piece 9 returns, so the movable contact piece 1
4 is also displaced to the left, the normally open fixed contact 16 and the i+7 moving contact 17 are opened, and the normally closed fixed contact 15 and the moving contact 1 are opened.
7 is closed.

Here, even if nitric acid due to arc generation when opening and closing the contact points 2 attempts to transfer to the electromagnet device 10 side, the elastic thin film body 2
2 prevents the transfer from the contact mechanism section 18 side to the electromagnet device 10 side.

Corrosion of the conductor wire of the coil 6 is prevented. Furthermore, since the dust and carbon particles of the contact material caused by the contact opening/closing operations are prevented from scattering toward the electromagnet device 10 side, the operation of the movable iron piece 9 is maintained properly, and the contact mechanism section 18 side is also prevented from scattering. Even if heat is generated, it is cut off by the elastic thin film body 22, so
This prevents the operating characteristics of the coil 6 from varying. Furthermore, the electromagnet 10 removes heat and outgas from the coil 6.
Since the transition to the side is also eliminated, the contact reliability of the contacts 15, 16 and 17 is increased.

In the above example, the displacement of the movable iron piece 9 is transmitted to the contact mechanism part 18 via the card 19. The present invention can also be applied to devices that drive the movable contact piece 14.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic configuration diagrams showing an example of an electromagnetic relay according to the present invention in an assembled state and an unassembled state, respectively, and FIG. 3 is an enlarged sectional view of a main part of the electromagnetic relay. l...Case, lO...Electromagnet device, 18...Contact mechanism section, 22...Reliable thin film body. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] (1) A case in which an electromagnet device and a contact mechanism section driven to open and close by the electromagnet device are arranged, and a case supported by the case to spatially separate the electromagnet device side and the contact mechanism section side in the case. An electromagnetic relay characterized by comprising an elastic thin film body.