JPS5918816B2 - polarized relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called monostable type polarized relay.

An embodiment of the present invention will be described below with reference to the drawings. 1 is a case, 2 is a U-shaped yoke disposed inside the case 1, and a coil 4 is wound around a coil frame 3 attached to the central path 2a. .

Reference numeral 5 denotes a permanent magnet having magnetic poles of the same polarity at both ends 5a and 5'a and a magnetic pole of a different polarity at one end 5'a from the center, and both ends of the magnet are attached to both side films 2b and 2'b of the yoke 2. It is arranged between the two side membranes 2b and 2'b so as to be in contact with each other.

Reference numeral 6 denotes a support fitting having a semicircular cross section made of a magnetic material, and is attached so as to come into contact with the magnetic pole in the middle of the permanent magnet 5, so that the distance d between the support fitting 6 and the tip of the side leg 2'b is equal to the distance d between the support fitting 6 and the tip of the side leg 2'b.
and the distance d between the tips of the side legs 2b.

Reference numeral 7 denotes a movable iron piece having a concave portion 7a on the lower center surface, and by engaging and pivoting the concave portion 7a to the support metal fitting 6, the movable iron piece T is supported by the support metal fitting 6 so as to perform a see-saw movement. The two membranes 2b and 7b are arranged so as to face each other at their respective tips.

8 is an insulator fixed to the upper surface of the central part of the movable iron piece 7, s, g
is a switch operated by seesaw movement of a movable iron piece 7, in which one end 9a, ffa of E-shaped leaf springs 9, 9' is fixed to the insulator 8, and both side leg leaf spring pieces of each of the leaf springs 9, 9' are fixed. Movable contacts 10b, 10c fixed to the bottom surface of each tip of 9b, 9cs, 9'b, t, 9'c
.

Fixed contacts 12b, 12c, 12'b fixed to the contact plates 1lb, 11C, 11'b, 11'c, respectively, fixed to the case 1, 1σb, 10'c,
Switches s facing each other so as to approach and separate from 12'c,
s' is constructed such that the bottom surfaces of the tips of the central leg leaf spring pieces 9d and 9'd of the leaf springs 9 and 9' are opposed to the tips of the protrusions 13 and 13' bored into the case 1. .

The present invention has the above configuration, and in FIG. 2, the side legs 2
When a current is applied to the coil 4 so as to magnetize the arm 2'b to the south pole and the side leg 2'b to the north pole, the magnetic flux of the permanent magnet 5 passing through the magnetic path 14 and the current of the coil 4 passing through the magnetic path 16 are created. The magnetic flux is such that almost no magnetic flux passes between the lower surface of the left end of the movable iron piece 7 and the tip of the side leg 2b in opposite directions between the lower surface of the left end of the movable iron piece 7 and the tip of the side leg 2b. The magnetic flux of the permanent magnet 5 passing through it and the magnetic flux created by the current of the coil 4 passing through the magnetic path 16 are in the same direction between the right end lower surface of the movable iron piece 7 and the tip of the side leg 2'b, and are connected to the right end lower surface of the movable iron piece 7 and the side. leg 7b
Since the magnetic flux passing between the central leg plate spring pieces 9' increases,
The lower surface of the tip of the movable iron piece 1 comes into pressure contact with the tip of the protrusion 13', and at the same time overcomes the spring force of the center leg plate spring piece 9'd, the lower surface of the right end of the movable iron piece 1 is brought into contact with and attracted to the tip of the side leg 7b, and the contact 1
0b, 10c are opened from contacts 12b, 12c, switch S is in an open state, and contacts 1σb, 1G'
c contacts contacts 12'b and 12'c, and the switch is closed.

After that, when the current in the coil 4 is cut off, since the distances d and d between the supporting metal fitting 6 and the membranes 2b and zb on both sides are d>d', the lengths of the permanent magnets 5 in the magnetization axis direction are different, and the permanent magnets 5 The longer the magnetization axis is, the larger it can be, and the ratio of the distance from the support fitting 6 to the point of action of each spring piece to the distance from the support fitting 6 to the membranes 2b and 7b on both sides, where the adsorption force acts on the movable iron piece 7, is on the d side. It is small and can be large on the d' side.

Therefore, due to the magnetic flux of the permanent magnet 5, the movable iron piece 7 and both arms 2b
, 2'b, of the magnetic adsorption moment that acts between the supporting metal 6
The moment in the direction of the arrow P (due to the magnetic attraction force of the permanent magnet 5 passing through the magnetic path 15) centered on is the spring force of the central leg plate spring piece 9'd and the spring force of the both side leg plate spring pieces 9'b and 9'c. The moment becomes smaller than the combined moment, and the lower surface of the right end of the movable iron piece 7 is separated from the tip of the side leg 7b, and the movable iron piece T
The lower surface of the left end approaches the tip of the side leg 2b, and the moment in the direction opposite to the arrow direction P (due to the magnetic attraction force of the permanent magnet 5 passing through the magnetic path 14) is caused by the spring force of the central leg plate spring piece 9d and the both side leg plates. The moment becomes larger than the sum of the spring forces of the spring pieces 9b and 9c, and thus the central leg plate spring piece 9d
The bottom surface of the tip of the movable iron piece T comes into pressure contact with the protrusion 13, and at the same time overcomes the spring force of the center leg plate spring piece 9d, the bottom surface of the left end of the movable iron piece T comes into contact with and is attracted to the tip of the side leg 2b, and the contacts 10b and 10c are connected to the contacts 12b and 12C. , the switch S is closed, and the contacts i o'b and iσC are the contacts 12b.

12c, it becomes an open state and becomes the state shown in Fig. 2. When the current of the coil 4 is cut off, the state shown in Fig. 2 is the only stable state, and it is a so-called monostable polarized relay. It is possible to provide

As described above, the present invention has two arms 2b of a U-shaped yoke 2, in which a permanent magnet 5 having magnetic poles of the same polarity at both ends and a different magnetic pole in the middle part is wound with a coil 4 around the central part 2a. 2'
b, and both ends of the permanent magnet 5 are placed between the two membranes 2b, 2'b.
The lower surfaces of both ends of the movable iron piece 7, which abuts on and attaches the support fitting 6 to the magnetic pole of the intermediate portion of the permanent magnet 5, and whose central lower surface pivots to the support fitting 6, are attached to the side legs 2b, 2'b. In a polarized relay in which switches s and s' are disposed in the case 1 and are operated by the see-saw movement of the movable iron piece 7, the distance d between the support fitting 6 and the tip of the side leg 2'b is
is smaller than the distance d between the support fitting 6 and the tip of the side leg 2b, so the conventional monostable polarized relay is as shown in Fig. 3 (the same parts as those of the present invention are designated by the same reference numerals) has.

) A permanent magnet 5 having the same polarity at both ends and a different magnetic pole at the center is disposed between both arms 2b and 2'b of a U-shaped yoke 2 around which a coil 4 is wound around the center 2a. Then, one end of the permanent magnet 5 is brought into contact with the side leg 2b to create a gap a between the other end of the permanent magnet 5 and the side leg 2'b, and the support metal fitting 6 is brought into contact with the magnetic pole in the middle part of the permanent magnet 5. The switch is actuated by the see-saw movement of the movable iron piece 7, which is attached and whose central lower surface is pivoted to the support metal fitting 6, and whose lower surfaces at both ends face the lower surfaces of the tips of the side legs 2b and 7b, and when the current in the coil 4 is interrupted. , because there is a gap a between one end of the permanent magnet 5 and the side leg 2'b, the state shown in Figure 3 is the only stable state, compared to a monostable polarized relay. In the present invention, both ends of the permanent magnet are in contact with both side films of the yoke, and there is no gap a in the prior art, which has the effect of eliminating a decrease in the magnetic efficiency of the permanent magnet.

[Brief explanation of the drawing]

Fig. 1 is an internal plan view of an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the x-xl-x', -x' lines, and Fig. 3 is the principle of a conventional monostable polarized relay. It is a diagram. 1 is the case, 2 is the yoke, 3 is the coil frame, 4 is the coil,
5 is a permanent magnet, 6 is a supporting metal fitting, 1 is a movable iron piece, 8 is an insulator, and S and S' are switches.

Claims (1)

[Scope of Claims] 1. Both side membranes 2b of a U-shaped yoke 2 in which a permanent magnet 5 having magnetic poles of the same polarity at both ends and a different magnetic pole in the middle is wound around a coil 4 around a central path 2a. Both ends of the permanent magnet 5 are placed between the membranes 2b and 7b. 2'b, and the supporting metal piece 6 is mounted on the permanent magnet 5 so as to be in contact with the magnetic pole of the intermediate part, and the lower surface of both ends of the movable iron piece 7 whose center lower surface is pivotally supported by the supporting metal piece 6 is attached to the side leg 2b, 2'b
In a polarized relay in which a switch S, which is operated by the see-saw movement of the movable iron piece 7, is disposed in the case 1, the distance d between the support metal fitting 6 and the tip of the side leg 7b is A polarized relay characterized in that the distance d between the support fitting 6 and the tip of the side leg 2b is made smaller than the distance d, so that the magnetic adsorption moments of the two ends of the movable iron piece 7 by the permanent magnet 5 are made different.