JPS59132535A - Electromagnetic contactor - 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 [Technical Field] The present invention relates to an electromagnetic contactor such as a polarized electromagnetic coupling.

[Background technology]

Conventionally, a small electromagnetic contactor shown in FIG. 6 has been proposed. In the figure, 60 is the main body case υ, which has a magnetic bar 61 at the bottom that is driven horizontally forward and backward! A magnet device 62 is housed.

A movable base 63 having movable contacts (not shown) is installed in the upper part of the main body case 60 in parallel with the magnetic bar 61 so as to be movable forward and backward. A reversing lever 64 is provided on one end side of the HJ moving table 63 and the magnetic bar 61 so as to be rotatable about 65 times 9 on a horizontal axis.
The upper end of the reversing lever 65 engages with four parts 66 of the movable base 63. The lower end of the reversing lever 64 is connected to a bottle 67 fixed to the magnetic bar 61 through a long hole 68. The bottle 67 is fitted and fixed into a hole of the magnetic bar 61. 68 is a spring that urges the reversing lever 64.

However, since the bottle 67 and the magnetic rod 61 are made of metal, they are subject to a lot of wear, and as they are repeatedly opened and closed, the hole in the magnetic rod 61 gradually becomes tighter and rattles, causing a change in characteristics. was there.

The reason why the hole in the magnetic bar 61 is more likely to wear than the bottle 67 is because the magnetic bar 61 is made of a magnetic material and is generally made of a soft material, whereas the pin 67 is made of a hard material from the viewpoint of strength. It is from.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic contactor in which wear at a connecting portion between a magnetic bar and a reversing lever can be reduced and changes in characteristics can be reduced.

[Disclosure of the invention]

In the electromagnetic contactor of the present invention, a magnetic plate and a connecting body made of synthetic resin are integrally tightened and fixed to one end of a magnetic bar by the same tightening and fixing means, and a reversing lever is connected to this connecting body via a pin.

Since the connecting body made of synthetic resin is used in this way, the contact between the bottle and the connecting body is the same as the contact between the metal and the synthetic resin, and wear is reduced. Therefore, changes in characteristics due to repeated opening and closing as in the prior art are reduced.

Further, since the magnetic plate is fixedly tightened together with the connecting body made entirely of synthetic resin, the magnetic plate can be securely fixed by the elasticity of the connecting body. Furthermore, although a connecting body separate from the magnetic bar is used, it is fixed using the same fixing means as the magnetic plate, which increases the number of man-hours.

A first embodiment in which this invention is applied to a polarized electromagnetic relay is described below.
This is shown in Figure M5. FIG. 1 is an explanatory diagram showing the basic principle. At A in the same figure, the first yoke 1 has left and right side pieces 2 and 3.
and a horizontal piece 4 that connects the left and right side pieces 2 and 3, forming a U-shape, and the left and right side pieces 2 and 3 each have an inner surface that is an armature surface 2a.

It is set as 3a. The second yoke 5 has a length shorter than the left and right pieces 2 of the first yoke 1, 3.78 ff, and faces the horizontal piece 4. The left and right outer surfaces of this second yoke 5 are polarized surfaces 5a,
It is set as 5b. The permanent magnet 6 is interposed between the first yoke 1 and the second yoke 5, and its magnetization axis direction is perpendicular. This first. The second yoke 1 and the 5° permanent magnet 6 are arranged one above the other as one block.

The armature 7 made of a magnetic rod is of a horizontal transition type, and is formed into an H-shape by left and right pieces 8 and 9 made of magnetic plates, and a water XF-rod LO connected to the left and right pieces. and both the inner and outer surfaces of the left and right side pieces 8 and 9 are polarized surfaces 8 a + 8
b r 9' a + 9 b. The inner and outer contact surfaces 8a, 8b, and 9a of the left and right side pieces 8 and 9.

9b is the first. Inner and outer contact surfaces 2 a of the second yokes 1 and 5
r 3 a r 5 a r 5 b K faces each other and performs a, b, c, and d respectively. A horizontal rod 10 of the armature 7 passes through the coil 11. In FIG. 1, the solid line X represents the magnetic flux of the permanent magnet 6, and the dotted line Y represents the magnetic flux of the coil 11.

Figures 21.1 to 5 embody the basic principle of Figure 1. The upper and lower Ml'B-lr are housed in a box 12 made of synthetic resin with an open top.

In this case, the upper and lower first yokes 1 are rotated 90 degrees from FIG. Horizontal piece 4 touches.

Coil] The winding frame 15 of 1 has a structure of 1. Coil 1
1 is wound around a winding trunk 16, and the winding trunk 16 has a hole 17 through which the armature 7 passes, and side walls 1'8 and 19 are formed integrally with the winding trunk 16 on the left and right sides. , this left and right side wall 18.
The upper and lower second yokes 5 are fixed in parallel with the coil 11 over a period of 19 degrees in a state rotated 90 degrees from FIG. A notch 20 is provided in the left and right side walls 18°]9 to facilitate fitting and fixing of the second yoke 5. Further, on the right wall 19, there is provided $21f for fully inserting and equipping the receiving blade terminal metal A22 to which the coil 11 is connected.

A cover 23 made of synthetic resin is placed over and fixed to the upper opening of the box 12. A 24-metal insulating plate is interposed between the cover 23 and the box 12.

This cover 23 has a clear structure. The cover 23 connects an upper wall 25, a side wall 26 including lowered side walls, this upper wall 25 and the lower both sides walls 26, and an external separate 27 that is divided into a plurality of parts.
7 and an internal separate 28 located at the same position as 7, and this internal separate 28 is an opening cavity 29 under the cross-sle.

External terminal fittings 30 trays are fixed to both outer chambers divided by both side walls 26 and external separates 27 of the cover 23. This terminal fitting 3o has vertical plug blades 31 integrally formed on both sides of the rightmost end, and when the cover 23 and box 12 are combined, the receiving blade terminal fitting 22 of the coil winding frame 15 is inserted into the terminal fitting 3o. The electrical connection with the coil 11 is completed. The other terminal fitting 30 is provided with a fixed contact 32, which is located in both inner chambers 33V (located) separated by an internal separate plate 28.

Further, in the cavity 29 of the lower opening of the cover 23, a movable table 34 is positioned which moves parallel to the armature 7 made of synthetic resin.

This movable base 34 has a through hole 35 formed at a position corresponding to the inner chamber 33 of the force (-23), and here a contact plate 36 with movable contacts 37 protruding from both sides, A contact pressure coil spring 38 is provided.The contact 37 of the movable table 34 and the contact 32 of the force z<-23 face each other in the inner chamber 33, and are separated when the movable table 34 moves.

The movable base 34 is prevented from falling by the insulating plate 24 described above.

The movable base 34 and the armature 7 are connected by an inverted leno (-39).

A shaft 40 completely passes through the center of the reversing lever 39, and this shaft 40 is entirely supported by the shaft fL41 of the right side wall 19 of the coil winding frame 15.

In the relationship between the reversing lever 39 and the armature 7, a shaft 42 is passed through the lower end thereof, and this shaft 42 is connected to the connecting body 4 made of synthetic resin.
3 into the groove 44 from above, and the right end of the armature 7 is inserted into the connecting body 43 and deformed under pressure to form the tightening and fixing part 7b.

The left end of the armature 7tI'i is similarly inserted into the left side piece 8 and deformed under pressure to form a pullout stop 7a. At the same time as this removal is stopped, a non-magnetic real plate 45 is interposed.

This plate 45 is provided to cant both ends of the magnetic characteristic curve of the permanent magnet 6 and to use the most stable range.

In the relationship between the reversing lever 39 and the movable base 34, the upper end 39a thereof is hooked into a cutout 46 of the lower opening.

Therefore, if the armature 7 horizontally moves to the right as indicated by the arrow Z in FIG. It moves horizontally to the left as indicated by the opposite arrow V, and the contacts 32 and 37 of each side join. The bonding is maintained by the magnetic flux of the permanent magnet 6 as shown in the principle diagram of FIG.

The armature 7 is pressed in the direction of arrow Z by a chevron-shaped flat spring 47. This chevron-shaped flat spring 47 has a top portion 47a, a stop portion 7aK for pulling out the armature 7 on the left side, and both ends 47bk.
It is applied to the left side wall 14 of the box 12.

The movable base 34 is compressed by a coil spring 48 in a direction opposite to the direction of the arrow (■). This coil spring 48 is connected to the movable base 34
It is located between the moat indicator post 49 and the left side wall 26 of the car <-23.

The spring pressures of these two springs 47 and 48 act on the armature 7 and the movable base 34 in opposite directions, so that the armature 7 attempts to move from the state where it is attracted by the magnetic flux of the permanent magnet 6 to the opposite direction. This makes it easier to separate when doing so.

The display column 49 of the movable table 34 is located on the upper wall 25 (1
) It protrudes from the small hole 50, and the internal operation can be confirmed from the external force 1 at that position.

The soil wall 25&C of the cover 23 has a further terminal force /< -51
is covered. This terminal cup (-51) has driver operation holes 53 for terminal screws 52 in number corresponding to the terminal fittings 30 on both sides.

In addition, to install it, put out the hook feet 54 on both sides and cover 2.
3 into the small hole 55 of the upper wall 25.

Further, on both sides of the terminal cover 51, skirts 56't-hang down, which are located between the outer separators 27 of the cover 23 and minimize the exposure of the terminal fittings 30.

Although it is configured and operates in this way, since the synthetic resin connecting body 43 is used to connect the reversing lever 39 and the armature 7, the contact between the shaft 42 and the connecting body 43 is caused by the contact between metal and synthetic resin. This reduces wear. Therefore, changes in characteristics due to repeated opening and closing as in the prior art are reduced.

In addition, the side piece 9 made of a magnetic plate is connected to a connecting body 43 made of synthetic resin.
At the same time, since the tightening is fixed by the tightening fixing portion 7b, the side piece 9 can be securely fixed by the elasticity of the connecting body 430.

Also, although a connecting body 43 that is separate from the armature 7 is used,
Since it is fixed using the same fixing means as the side piece 9, there is no problem of increased work man-hours.

In the above embodiment, the connecting body 43 is fixed to the armature 7 by the tightening fixing part 7b which is deformed by pressure, but a screw may be used as the tightening fixing means.

〔Effect of the invention〕

In the electromagnetic contactor of the present invention, wear at the connecting portion between the magnetic bar and the reversing lever is reduced, and changes in characteristics can be reduced. Moreover, there is an effect that the magnetic plate can be securely fixed.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the basic principle of a polarized electromagnetic relay according to an embodiment of the present invention, Fig. 2 is a sectional view showing its specific structure, Fig. 3 is a cross-sectional side view of Fig. 2, and Fig. 4 is Similarly, FIG. 5 is a sectional plan view, FIG. 5 is an exploded perspective view, and FIG. 6 is a sectional view of the conventional example. 7... Armature (magnetic rod), 7b ・Tightening fixing part, 8
．． 9... Side piece (magnetic plate), 11... Coil, 15...
... Winding frame, 32... Fixed contact, 34... Movable base, 36
...Movable contact, 39...Reversing lever, 40.42.
・Axis, 43...Connection No.? Figure 4

Claims (1)

[Claims] It has a magnetic bar that is driven horizontally forward and backward, and at one end of this magnetic bar, a magnetic plate and a connecting body made of synthetic resin are integrally surrounded by a fixing means. A movable table is provided with a movable contact that is movable in parallel with the magnetic bar, and a fixed contact is fixedly installed in correspondence with the mable contact, and the movable base is rotatably supported around a horizontal support axis in the middle. An electromagnetic contactor completely equipped with a reversing lever whose upper end is connected to the movable table r (retained) and whose lower end is connected to the connecting body.