KR960005889Y1 - Electromagnetic relay device - Google Patents

Abstract

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Description

Contact point device of electromagnetic relay

1 is a block diagram of a conventional electromagnetic relay

2 is a block diagram of an electromagnetic relay to which the device of the present invention is applied

3 is a front view and a side view of a contact point applied to the present invention

4 is a cross-sectional view taken along the line B-B of FIG.

5 is a cross-sectional view taken along the line C-C of FIG.

6 is an enlarged view of part A of FIG.

7 is a cross-sectional view taken along the line D-D of FIG.

8 is a cross-sectional view taken along the line E-E of FIG.

* Explanation of symbols for main parts of the drawings

7: base block 7a: groove

7b: protrusion 7c, 7d: support protrusion

9, 10, 11: contact point 12, 13: embossing projection

14: folds

The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay that can maintain a constant interval between the contact.

Electronic relays are commonly referred to as relays and are devices that identify the type of electrical energy in the input circuit in response to electrical inputs above a certain value and control the opening and closing of other electrical circuits with the output.

Here, the type of electrical energy is determined by factors such as the input voltage, the magnitude of the current, the frequency, the duration of the input, and the electromagnetic relay has a specific range in which the magnitude of the input reaches from zero or in a specific range. Opening or closing other battery circuits by identifying changes such as whether the system has

FIG. 1 is a configuration diagram showing an example of an electromagnetic relay generally used in the related art. The electromagnetic relay includes a bobbin 1 in which a coil 2 is wound, a core 3 inserted and fixed in the center of the bobbin, A yoke 4 provided on one side of the bobbin, an amateur 5 provided on one side of the yoke and drawn or dropped into the core by an electromagnetic force, and a card connected to the amateur and moving together with the movement of the amateur ( 6), a movable contact stand 9 connected to the card and moving together with the card, and a make fixed contact point 10 installed on one side of the movable contact point and an opposite side of the make fixed contact point based on the movable contact point. And a brake fixed contact point 11 provided at the upper side, a base block 7 supporting the respective contact points, and a case 8 covering the base block to protect all parts.

In addition, the contact points are inserted into each hole formed in the base block during assembly and then molded and fixed by an epoxy resin that serves as an adhesive. The movable contact point 9 is a plate spring material having excellent elasticity, and in a non-conductive state of the coil. It is connected to the brake fixed contact stand 11.

However, when a DC current of a predetermined value or more flows in the coil 2 in the state shown in FIG. 1, the armature 5 is attracted to the core 3 and the card 6 moves in the left direction on the drawing and the movable contact connected to the card. The stand 9 is connected to the make fixed contact stand 10.

That is, when a current flows in the coil 2, a magnetic force is generated, and a plurality of magnetic lines of force (magnetic flux) pass through the core 3, which is almost all magnetic flux because it is easier to pass through the iron flux than through the air. Through the inside of the yoke 4 and close to the armature, the core 3 side becomes the S pole, the armature 5 becomes the N pole, and thus the armature is attracted to the core as shown by the arrow direction in FIG. According to the operation of the tour, the card 6 and the movable contact table 9 are moved to connect to the make stationary contact table 10.

At this time, if the current flowing in the coil is higher than or equal to a certain value, the force that attracts the armature 5 to the core 3 is greater than the self-spring force of the movable contact point 9 so that the movable contact point 9 moves. However, when the current flowing in the coil is below a certain value or the supply of current is stopped, the movable contact table 9 returns to its original position by its own spring force, and the armature 5 also returns from the core 3 to the original position. do.

However, the conventional electromagnetic relay as described above has a structure in which each contact block is inserted into the hole of the base block 7 and then molded and fixed with epoxy resin, so that it is difficult to accurately maintain the gap between the contact blocks.

Therefore, even if the distance between each contact is not constant, the movable force of the movable contact must be large in order to connect each contact smoothly, and in order to increase the movable force of the movable contact, the coil force of the coil must be increased to increase the electromagnetic force. This will increase power consumption.

The present invention is to provide a device that can be assembled without the use of an adhesive such as epoxy resin by the outline of the contact block and the base block, and the gap can be maintained accurately between the contact block, attached to this A detailed description will be given with reference to FIGS. 2 through 8.

2 is a configuration diagram of the electromagnetic switch to which the device of the present invention is applied. The bobbin 1, the coil 2, the core 3, the yoke 4, the armature 5, the card 6, and the base block 7 are shown in FIG. The basic configuration of the case 8 is the same as a general electronic switch.

The base block 7 is formed with a plurality of holes into which the contact block is inserted, and the make fixed contact table 10, the movable contact table 9, and the brake fixed contact table 11 are inserted into and fixed to the holes of the base block. .

A plurality of embossing synchronizations 12 and 13 are formed in each of the contact strips 9, 10 and 11, and the folded portions 14 are formed at portions exposed to the outside of the base block. Formed.

Therefore, the end portion of each contact block (part inserted into the substrate) has a thickness twice that of the other parts, so that the contact block is not bent when the magnetic contactor is inserted into the board.

On one side of the hole of the base block 7, the inclined grooves 7a and the embossing protrusions 13, which can be inserted while sliding the embossing protrusions 12 of the contact points, are pressed. The protrusion 7b of the present invention is formed, and the support protrusions 7c and 7d that support the upper end portions of the brake fixed contact point 11 and the make fixed contact point 10 are located above the base block 7. Is integrally formed.

Therefore, when the contact block is inserted into each hole formed in the base block 7, the embossing projection 12 of the contact block is fitted into the groove 7a of the base block 7, and at the same time, the protrusion of the base block in the embossing projection 13 portion. (7b) is connected to each contact is fixed in the state fitted in the hole, at this time, the upper end of each contact is connected to the support projections (7c) (7d) formed in the base block, so that the interval (G) between each contact is constant maintain.

As described above, the present invention can assemble the contact block and the base block by the protrusions and the grooves formed in the contact block and the base block, so that the distance between the contact blocks can be kept constant and the assembly work becomes simple.

In addition, the contact force variation of each contact point is kept constant, and the contact force fluctuations of each contact point are reduced, and there is no need to move the movable contact point with a larger force than necessary. do.

Claims (3)

When the embossing synchronization 12 and 13 are formed in each of the contact blocks 9, 10 and 11, and the embossing projection 12 slides in one side of the hole of the base block 7 into which the contact blocks are inserted. Forming a projection (7b) for pressing the photo groove (7a) and the embossing projection 13, the contact point device of the electromagnetic relay, characterized in that the embossing projection of each contact point can be fitted into the groove of the base block. The contact point device of an electromagnetic relay according to claim 1, wherein a support protrusion (7c) (7d) for supporting the contact point is formed on the base block (7). The contact point device of an electromagnetic relay according to claim 1, wherein a folding portion (14) is formed on one side of each contact point.