JPH028353Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] This invention relates to the structure of an electromagnetic relay, particularly a magnetic retention type relay using a permanent magnet.

[Prior art]

Conventional magnetic retention type relays are shown in FIGS. 4 to 6. Figure 4 is a front view of the relay, and Figure 5 is a perspective view of the relay.As shown in the figure, a U-shaped shunt iron 13 that branches the magnetic path of the permanent magnet is a yoke that forms part of the magnetic circuit. It was fixed to 2.

That is, the yoke 2 and the shunt iron 13 are joined together as shown in the cross section in FIG. In order to prevent this, the surface 2b of the yoke 2 is sloped as shown in the figure, so that even if it receives a shock, the shunt 13
The structure is such that its position does not change. However, there are manufacturing difficulties, such as sloping the surface 2b of the yoke 2 and providing screw holes.On the other hand, when assembling the relay, the stopper 8 attached to the shunt iron 13 or the shunt iron 13 Due to external force acting on the shunt iron 13, the position of the shunt iron 13 may shift, or the shunt iron 13
The armature 6 moves via the tip of the stopper 8 attached to the armature, and the contact gauging changes via the card at the tip of the armature arm, impairing the characteristics of the relay, so be extremely careful when assembling and handling it. was needed.

[Purpose of invention]

The purpose of this invention is to eliminate such drawbacks, strengthen the structure by fixing the shunt iron 13 to the frame 5 with the fixing plate 14, and provide a more stable magnetically held relay.

[Summary of the idea]

In other words, the magnetic retention type relay according to this invention overcomes the difficulties in manufacturing the yoke 2 seen in conventional magnetic retention type relays, the need for extreme care in handling, and the tendency for changes in the characteristics of the relay to occur. This eliminates the drawbacks such as stubs and the like by fixing the shunt iron 13 and the frame 5 with a fixing plate 14.

[Example of idea]

Hereinafter, embodiments of this invention will be described with reference to the drawings.

1 to 3 are views showing one embodiment of this invention, and FIG. 2 shows the fixing plate 14 of FIG. 1.
3 is a cross-sectional view of a portion where a U-shaped shunt iron 13 is fixed to the yoke 2 in FIG. 1 with a screw 7.

This idea is based on a winding 4 on an iron core 3 as shown in Figure 1.
Arrange the electromagnet equipped with the yoke 2 and the permanent magnet 1 in series with it, connect it to the frame 5 in parallel with the fixing screws 17 (Fig. 4), and tighten it.The frame 5 and the iron core 3
An armature 6 is arranged on the end face of the yoke 2, which is fixed to the frame 5 with an armature support plate 9, a washer 10, and a fixing screw 11. In a magnetic circuit assembly in which a U-shaped shunt iron 13 constituting a magnetic circuit is arranged on the armature 6, the shunt iron 13 is attached to the frame 5 with fixing screws 15 and 16 using a fixing plate 14 according to this invention. It is fixed. Note that 14 is a non-magnetic material that does not exert any magnetic influence. That is, the relay has a conventional structure shown in FIG. 4, in which a spring assembly 12 consisting of a movable spring, a fixed spring, a return spring, and an insulating plate is fixed to a frame 5 (see FIGS. 1 and 3). (omitted here), the contacts are opened and closed by the armature arm provided on the armature 6. To explain in more detail, the operation and return of the relay is determined by the correlation between the direction of the magnetic flux generated from the electromagnet due to the drive current pulse passed through the winding 4 and the direction of the magnetic flux generated from the permanent magnet 1. It has a structure in which the operating direction is determined and the movement is made to operate or return, and the magnetic circuit consists of the main magnetic circuit of the permanent magnet 1, yoke 2, iron core 3, armature 6 and frame 5, and the permanent magnet 1, yoke 2, It consists of a shunt iron 13, an armature 6, and an auxiliary magnetic circuit of a frame 5. The magnetic flux from the permanent magnet 1 is sent to the main magnetic circuit and the auxiliary magnetic circuit from the yoke 2 to the iron core 3.
and the shunt iron 13, join at the armature 6, and flow to the frame 5.

In operation, by setting the direction of the magnetic flux generated from the electromagnet in the same direction as the direction of the magnetic flux generated from the permanent magnet 1, the magnetic flux on the iron core 3 side of the main magnetic circuit increases in the operating part of the armature 6. Since the magnetic attraction force becomes stronger, the armature 6 is attracted to the iron core 3.
On the other hand, in return, the direction of the magnetic flux generated in the electromagnet is opposite to the magnetic flux generated from the permanent magnet 1, so that the magnetic flux on the iron core 3 side of the main magnetic circuit decreases in the operating part of the armature 6. , the magnetic attraction force on the iron core 3 side returns to less than the magnetic attraction force that attracts and holds the armature 6, including the force pushing up the contact spring of the spring assembly 12, and the shunt iron 1 of the auxiliary magnetic circuit returns.
Attracted to the 3rd side. Note that even if the driving current pulse applied to the winding 4 is removed, the operation and return state can be maintained by the residual magnetic flux of the permanent magnet 1.

Regarding manufacturing and assembly, please refer to the shunt railway 1 shown in Figure 3.
The joint surface 2b of No. 3 is arranged at right angles to the surface 2a of the yoke 2,
The screw holes in the surface 2b are drilled parallel to the surface 2a, and the yoke 2 and the shunt iron 13 are fixed with fixing screws 7 at right angles to each other, so manufacturing and assembly are very easy.

Further, the fixing plate 14 shown in FIG. 2 has holes 14a and 14b, the frame 5 in FIG. Screw holes corresponding to the holes 14b of the fixing plate 14 are drilled and fixed with fixing screws 16 as shown in FIG. Therefore, unlike the conventional method in which the end of the shunt iron 13 is fixed only with the fixing screw 7, in this invention, the other end of the shunt iron 13 is further fixed to the frame 5 by the fixing plate 14. Since it is completely fixed, there is no displacement of the shunt iron due to shock or external force during transportation.

As explained above, this idea
By fixing the shunt iron 13 to the frame 5 using the fixing plate 14, the shunt iron 13 can be securely fixed to the frame 5, and the characteristics of the magnetic retention type relay can be improved, and furthermore, manufacturing is facilitated. be.

[Brief explanation of drawings]

Figures 1 to 3 all show this invention; Figure 1 is a perspective view of a magnetically held relay, Figure 2 is a diagram showing a fixed plate, and Figure 3 is a diagram showing a shunt relay connected to a yoke. Figures 4 to 6 are cross-sectional views of a conventional magnetic retention type relay, with the
The figure is a front view, FIG. 5 is a perspective view, and FIG. 6 is a cross-sectional view showing the shunt iron attached to the yoke with screws. Explanation of symbols, 1...Permanent magnet, 2...Yoke, 3
...Iron core, 4...Winding, 5...Frame, 6...
Armature, 7...Fixing screw, 8...Stopper, 9
... Armature support plate, 10 ... Washer, 11 ... Fixing screw, 12 ... Spring assembly, 13 ... Shunt iron, 14
...fixing plate, 15...fixing screw, 16...fixing screw, 17...fixing screw.

Claims (1)

[Scope of utility model registration request] An electromagnet 1 with a winding 4 attached to an iron core 3, a yoke 2 and a permanent magnet 1 arranged in series with it, and a fixing screw 17
Connect and tighten frame 5 in parallel with frame 5.
An armature 6 is arranged on the end face of the iron core 3, and this is fixed to the frame 5 with an armature support plate 9, a washer 10, and a fixing screw 11, and the armature 6 is connected so as to surround the electromagnet with the winding 4 attached to the iron core 3. A magnetic circuit assembly in which a U-shaped shunt iron 13 forming a magnetic circuit is arranged from the iron 2 to the armature 6, and the shunt iron 13 is fixed to the frame 5 with a fixing plate 14. type relay.