JPH0544129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electromagnetic contactor such as a polarized electromagnetic relay.

[Background technology]

Conventionally, a small electromagnetic contactor shown in FIG. 6 has been proposed. In the figure, 60 is a main body case, and an electromagnet device 62 having a magnetic bar 61 that is horizontally driven forward and backward is housed in the lower part of the main body case. 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 attached to one end of the movable base 63 and the magnetic bar 61 on a horizontal shaft 65.
The upper end of the reversing lever 65 engages with a recess 66 of the movable base 63. The lower end of the reversing lever 64 is connected to a pin 67 fixed to the magnetic bar 61 through a long hole 68. The pin 67 is fitted into a hole of the magnetic bar 61 and fixed. 69 is a spring that biases the reversing lever 64.

However, since the pin 67 and the magnetic bar 61 are made of metal, they are subject to significant wear, and when they are repeatedly opened and closed, the hole in the magnetic bar 61 gradually becomes larger, causing wobbling and changing the characteristics. .
The reason why the hole in the magnetic bar 61 is more worn than the pin 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. On the other hand, it is possible to use a synthetic resin material for the connecting portion between the magnetic bar and the reversing lever, as disclosed in, for example, Japanese Patent Laid-Open No. 57-72229. However, since a means for fixing the synthetic resin material is required, there is a drawback that the number of parts increases.

[Purpose of the invention]

An object of the present invention is to reduce wear in the connecting portion between the magnetic bar and the reversing lever, and to reduce the number of parts.

[Disclosure of the invention]

The electromagnetic contactor of the present invention has a magnetic bar that is driven horizontally forward and backward, and includes an electromagnetic device in which a magnetic plate and a synthetic resin coupling body are connected to one end of the magnetic bar, and a magnetic A movable table is installed in parallel with the rod so as to be able to advance and retreat and is provided with a movable contact, a fixed contact is fixedly installed in correspondence with the movable contact, and the upper end is pivoted in the middle to be rotatable around a horizontal support axis. a reversing lever that engages with the movable base and whose lower end is pin-coupled to the connecting body, a hole is formed in the magnetic plate and the connecting body, and a protrusion that fits into the hole at the one end of the magnetic bar; The magnetic plate and the connecting body are integrally connected to the one end of the magnetic bar by overlapping the magnetic plate and the connecting body and caulking the through end of the protrusion passed through the hole. This is a characteristic feature.

Because we use synthetic resin connectors in this way,
The contact between the pin and the connecting body results in contact between the metal and the synthetic resin, reducing wear. Therefore, changes in characteristics due to repeated opening and closing as in the conventional case are reduced.

In addition, a protrusion is formed on one end of the magnetic bar, and the protrusion is fitted into the hole of the magnetic plate and the connecting body, and the penetrating end is caulked, which reduces the number of parts and connects the magnetic plate to the magnetic bar at the same time. This makes assembly easy.

An embodiment in which the present invention is applied to a polarized electromagnetic relay is shown in FIGS. 1 to 5. FIG. 1 is an explanatory diagram showing the basic principle. In the figure, the first yoke 1 is formed into a U-shape by left and right pieces 2 and 3 and a horizontal piece 4 that connects the left and right pieces 2 and 3.
And the left and right side pieces 2 and 3 have their inner surfaces connected to the polarized surface 2.
a, 3a. The second yoke 5 has a length shorter than the distance between the left and right pieces 2 and 3 of the first yoke 1, and faces the horizontal piece 4. The left and right outer surfaces of the second yoke 5 serve as armature surfaces 5a and 5b. The permanent magnet 6 is the first
It is interposed between the yoke 1 and the second yoke 5, and its magnetization axis direction is perpendicular. The first and second yokes 1 and 5 and the permanent magnet 6 are arranged one above the other as one block. The armature 7 made of a magnetic bar 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 horizontal bar 10 that connects these left and right pieces 8 and 9. Both the inner and outer surfaces of the left and right side pieces 8, 9 are polarized surfaces 8a, 8b, 9a, 9b. The inner and outer contact surfaces 8a, 8 of these left and right side pieces 8, 9
b, 9a, 9b face the inner and outer contact surfaces 2a, 3a, 5a, 5b of the first and second yokes 1, 5, forming air gaps a, b, c, d, respectively. A horizontal rod 10 of the armature 7 passes through the coil 11. In FIG. 1, the solid line X is the magnetic flux of the permanent magnet 6, and the dotted line Y is the magnetic flux of the coil 11.

2 to 5 embody the basic principle of FIG. 1. The upper and lower first yokes 1 are housed in a box 12 made of synthetic resin and having an open top. In this case, the upper and lower first yokes 1 are rotated 90 degrees from FIG. 1 and sit on the bottom wall 13 of the box 12, and the left side piece 2 and the horizontal piece 4 are in contact with the side wall 14.

The winding frame 15 of the coil 11 has the following structure. The coil 11 is wound around the winding trunk 16, and the winding trunk 1
6 has a hole 17 through which the armature 7 passes, and side walls 18 and 19 are formed integrally with the winding drum section 16 on the left and right sides, and upper and lower side walls 18 and 19 are formed parallel to the coil 11 between the left and right side walls 18 and 19. The second yoke 5 is shown in FIG.
Fixed in a 90 degree rotation. This left and right side wall 1
8 and 19 are provided with cutouts 20 to facilitate fitting and fixing of the second yoke 5. Further, the right side wall 19 is provided with a groove 21 into which a receiving blade terminal fitting 22 to which the coil 11 is connected is inserted and equipped.

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

This cover 23 has the following structure. cover 2
3 is a side wall 2 including an upper wall 25 and lowered side walls.
6, this upper wall 25 and the lower side walls 26 are connected, and an external separate 27 is divided into a plurality of parts.
, an internal separate 28 located at the same position as the external separate 27 , and a lower opening cavity 29 that crosses the internal separate 28 .

External terminal fittings 3 are provided in both outer chambers divided by both side walls 26 and external separates 27 of the cover 23.
It is fixed at 0. This terminal fitting 30 has vertical plug blades 31 integrally formed on both sides of the rightmost end.
When the cover 23 and box 12 are combined, it is inserted into the coil winding frame 15 and the receiving blade terminal fitting 22 to complete electrical connection with the coil 11. The other terminal fitting 30 is provided with a fixed contact 32, which is located in internal chambers 33 on both sides divided by an internal separate plate 28.

Further, in the cavity 29 of the lower opening of the cover 23, a movable base 34 is located 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 cover 23, and a contact plate 36 provided with movable contacts 37 protruding from both sides, and a contact plate 36 for contact pressure. A coil spring 38 is provided. The contact 37 of this movable base 34 and the cover 23
The contact point 32 of the movable base 34 faces the inner chamber 33
Separate at the transition.

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

The movable table 34 and the armature 7 are connected by a reversing lever 39.

The reversing lever 39 has a shaft 40 passed through its center, and the shaft hole 4 of the right side wall 19 of the coil winding frame 15 is connected to the shaft 40.
Supported by 1.

In the relationship between the reversing lever 39 and the armature 7, a shaft 42 is passed through its lower end, and this shaft 42 is fitted into the groove 44 of the synthetic resin connecting body 43 from above, and the projection on the right end of the armature 7, which is a magnetic bar, is inserted into the groove 44 of the synthetic resin connecting body 43 from above. 7b is passed through the hole 9c of the right side piece 9, which is a magnetic plate, and is fitted into the hole 43a of the connecting body 43 via the non-magnetic residual plate 45, and the through end is caulked to integrate them. is connected to.

The protrusion 7a at the left end of the armature 7 similarly fits into the hole 8c of the left piece 8, and a non-magnetic residual plate 45 is fitted and fixed by caulking. This plate 45 is provided to cut 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 moves horizontally to the right as indicated by the arrow Z in FIG.
9 rotates counterclockwise around a central shaft 40, and the movable base 34 horizontally moves to the left as indicated by an arrow V opposite to the armature 7, and the contacts 32 and 37 of each chamber are joined. The bonding is maintained by the magnetic flux of the permanent magnet 6 according to the principle diagram shown in FIG.

The armature 7 is pressed in the direction of arrow Z by a chevron-shaped flat spring 47. This mountain-shaped flat spring 47 has its top 47a pressed against the protrusion 7a of the armature 7, and both ends 4
7b is applied to the left side wall 14 of the box 12.

The movable base 34 is biased by a coil spring 48 in a direction opposite to the direction of arrow V. This coil spring 4
8 is located between the display column 49 of the movable base 34 and the left side wall 26 of the cover 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 2 of the cover 23.
It protrudes from the small hole 50 of No. 5, and the internal operation can be confirmed from the outside at that position.

The upper wall 25 of the cover 23 further includes a terminal cover 5.
1 covers. This terminal cover 51 has driver operation holes 53 for terminal screws 52 in number corresponding to the terminal fittings 30 on both sides.

Also, to install it, put out the hook feet 54 on both sides,
It is inserted into the small hole 55 of the upper wall 25 of the cover 23. Furthermore, covers 23 are provided on both sides of the terminal cover 51.
The terminal fitting 30 is located between the external separators 27 of
A skirt 56 hangs down to minimize exposure.

Although it is configured and operates in this manner, 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, since the side piece 9 made of a magnetic plate is connected with the connecting body 43 made of synthetic resin by the protrusion 7b,
The elasticity of the connecting body 43 allows the side pieces 9 to be securely fixed. Further, although the connecting body 43 which is separate from the armature 7 is used, since it is fixed by the same fixing means as the side piece 9, there is no problem of an increase in the number of work steps.

〔Effect of the invention〕

In the electromagnetic contactor of the present invention, the connecting body of the magnetic rod that connects the pin to the reversing lever is made of synthetic resin, so wear at the connecting part between the magnetic rod and the reversing lever is reduced, and changes in characteristics can be reduced. . Furthermore, since the magnetic plates and the connecting body are overlapped and connected by screwing through the projections of the magnetic rod, the number of parts can be reduced, and since the magnetic plates and the connecting body are connected to the magnetic rod at the same time, assembly is simplified.

[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 cross-sectional plan view, and FIG. 5 is an exploded perspective view.
FIG. 6 is a sectional view of a conventional example. 7... Armature which is a magnetic bar, 7a, 7b
...Protrusion, 8...Left side piece, 8c, 9c...Hole, 9
... Right side piece which is a magnetic plate, 11 ... Coil, 32
... Fixed contact, 34 ... Movable base, 36 ... Movable contact, 39 ... Reversing lever, 43 ... Connecting body.

Claims (1)

[Claims] 1. An electromagnet device having a magnetic bar that is driven horizontally forward and backward, and a magnetic plate and a synthetic resin connecting body connected to one end of the magnetic rod, and an electromagnet device that is movable above the magnetic rod in parallel with the magnetic rod. A movable base is installed and provided with a movable contact, a fixed contact is fixedly installed in correspondence with the movable contact, and the movable base is rotatably supported in the middle about a horizontal support shaft, and the upper end engages with the movable base. a reversing lever whose lower end is connected to the connecting body with a pin,
A hole is formed in the magnetic plate and the connecting body, and a protrusion that fits into the hole is formed on the one end of the magnetic bar, and the magnetic plate and the connecting body are overlapped and the protrusion passes through the hole. An electromagnetic contactor characterized in that the magnetic plate and the connecting body are integrally connected to the one end of the magnetic bar by caulking the ends.