JPS63126130A - Electromagnetic relay - 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 1] The present invention relates to an electromagnetic relay whose contacts are driven to open and close in accordance with the energized state and de-energized state of a coil.

[Background Art] Generally, as shown in Fig. 5, an electromagnetic relay has a fixed iron core 5.
A coil 12' is wound around the yoke 14', and an armature 2' is hinged to one end of a yoke 14' which is magnetically coupled to one end of the fixed iron core 5'. The armature 2' is attracted to the other end of the fixed iron core 5 when the coil 12' is energized, and when the coil 12' is in a non-excited state, the fixed iron core is attracted by the return spring 22'. It's starting to move away from 5. Also, the card 31 is attached to the armature 2.
A movable contact spring 32'' is held through the coil 12, and the contacts are driven to open and close when the armature 2'' swings in response to the energization and de-energization of the coil 12.

By the way, when trying to open and close multiple poles in this configuration, it is necessary to arrange the contacts of different poles in a direction perpendicular to the paper surface of Figure 155, and in this case, a problem arises that the distance between the poles cannot be large. Also, since the armature 2° is hinged to the yoke 14′, the fixed iron core 5 increases as the distance from the fulcrum of the armature 2′ increases.
The distance between the end face of the armature and the opposing face of the armature 2° increases. In other words, the stroke of the card 31' changes depending on the mounting position of the card 31' on the armature 2', the support of the armature 2', and the α position, and if the positional accuracy is not adequately managed, the operating characteristics will change. There is a problem that variations tend to occur.

[Object of the Invention] The present invention has been made in view of the above-mentioned α, and its purpose is to prevent the stroke from changing depending on the mounting position of the card, and to reduce the distance between the contact and α poles. An object of the present invention is to provide an electromagnetic relay which can have a sufficiently large value.

[Disclosure of the Invention 1 (Made by NII) The electromagnetic relay according to the present invention includes a cylindrical coil that is fixed at a fixed position on a base, and a cylindrical coil that extends in the axial direction within the coil with both ends protruding from the coil. an armature that is passed through the coil and is disposed so as to be movable in one direction perpendicular to the axial direction of the coil;
A yoke has a pair of magnetic pole pieces disposed opposite to each other at both ends of the armature in the coil, and the two magnetic pole pieces are magnetically coupled to each other around the outer periphery of the coil, and the base is connected to both ends of the armature. A pair of return springs are interposed between the two and urge the armature away from the yoke, and a pair of cards are attached to both ends of the armature and drive the contacts as the armature moves. It consists of Therefore, one of the Vf characteristics of the present invention is that the armature is inserted into the coil, and small size and high magnetic efficiency can be obtained.Another feature is that both ends of the armature are supported by return springs. Since the armature moves in parallel, the curve to the armature is
Another feature is that a pair of cards are provided at both ends of the armature in the longitudinal direction to drive the contact 1511 closed, With this configuration, the distance between poles can be increased.

(Top Example 1) As shown in the fIS1 diagram, it has a coil 12 wound around a cylindrical coil frame 11, a pair of magnetic pole pieces 13 inserted into the coil frame 11, and a magnetic pole piece 13 on the outer periphery of the coil frame 11. A coil block 1 is formed by a yoke 14 in which both magnetic pole pieces 13 are bridged. This coil block 1 is the base 3
Fixed in position above. Each yoke 14 is formed by combining two yoke element bodies 15 which are formed into a substantially square shape by a magnetic material, and both yoke element bodies 15 are connected to the coil frame 11.
The coil frame 11 is joined to the outer periphery of the coil frame 11 by interleaving, and is spaced apart from each other on the inner periphery of the coil frame 11 to form magnetic pole pieces 13 . That is, the coil block 1 can be assembled by mounting eight coils 12 in the coil frame 11 and then combining the yoke body 15. An armature 2 made of a magnetic material and formed in a flat plate shape is inserted into the coil frame 11 with both ends thereof protruding from the coil frame 11 . Here, the inner diameter of the coil frame 11 is such that the magnetic pole pieces 13 and the armature 2 are
1, the armature 2 is set to be movable between a position where it contacts the magnetic pole piece 13 and a position where it separates from the magnetic pole piece 13.

A spring receiver is provided with grooves 2 at both ends of the armature 2 in the longitudinal direction.
1 is formed, and one end of a plate-shaped return spring 22 is attached to each spring receiver rVi21. The other end of each return spring 22 is a spring receiver provided at a fixed position on the base 3, and is fixed to a member 23. The armature 2 is urged away from the magnetic pole piece 13 by both return springs 22 . A card 31 made of an insulating material is attached to each end of the armature 2 protruding from the coil frame 11, and a movable contact spring 32 attached to the base 3 is pressed against the card 31.

One end of the movable contact spring 32 is fixed to a terminal piece 33 fixed to the base 3, and the other end is provided with a movable part α34 that forms contacts 30g and 30b together with the fixed contact 35. The fixed contact 35 is provided on a terminal piece 36 fixed to the base 3. Here, contact point 3 placed at the top of FIG.
0a is a#, a point (normally open contact), and the contact 30b arranged at the bottom is a b contact (normally closed contact).

(Operation) The operation will be explained below. When the coil 12 is in a non-energized state, the armature 2 is positioned away from the i-pole piece 13 of the yoke 14 due to the spring force of the return spring 22. At this time, the card 31 presses the movable contact spring 32 disposed at the bottom in FIG. 1 downward to close the b contact 30b. At this time, the a contact 30a is open. Next, when the coil 12 is energized to create an excited state of deafness, as shown in FIG.
acts, and the armature 2 moves in parallel in a direction perpendicular to its longitudinal direction. Here, the armature 2 is the coil 12
Since it is inserted inside the coil 12 and becomes the iron core of the coil 12, a strong attractive force acts between it and the magnetic pole piece 2, preventing magnetic flux leakage (high magnetic efficiency is obtained.
When the armature 2 is attracted to the magnetic pole piece 13 and the two magnetic pole pieces 13 are short-circuited by the armature 2, the card 31 presses the movable contact spring 32 disposed at the upper part in FIG. 1 upward. This closes the a contact 30a. Needless to say, when the coil 12 is de-energized, it returns to its original position due to the spring force of the return spring 22.

(Example 2) This embodiment shows an example in which a C contact is formed.

That is, the structure of the coil block 1 is similar to that of the first embodiment, and cards 41 made of an insulating material are attached to both ends of the armature 2. The card 41 is mounted in a movable element 42 formed of a conductive material such as copper into a substantially U-shape, and a return spring 43 formed of a spring material into a substantially U-shape is mounted on the outer surface of the movable element 42. One leg piece is fixed. Also,
The other leg of the return spring 43 is fixed to a fixed piece 44 made of a conductive material such as copper and fixed at a fixed position on the base 3.
This fixed piece 44 serves as a common terminal. A movable contact α45 is attached to the outer surface of both leg pieces of the movable element 42, respectively, and the movable contact 45 faces a fixed contact 47 provided on a terminal piece 46 fixed at a fixed position on the base 3. As a result, the armature 2 swings depending on whether the coil 12 is energized or de-energized, and as the armature 2 is driven, the movable contact
5 and the fixed contact 47 are opened and closed.

[Effect of the Invention 1] As described above, the present invention includes a cylindrical coil that is fixed at a fixed position on a base, and a cylindrical coil that is inserted into the coil along the axial direction with both ends protruding from the coil. The armature is movably arranged in one direction orthogonal to the direction, and a pair of magnetic pole pieces are arranged facing each other at both ends of the armature within the coil. a pair of return springs that are interposed between both ends of the armature and the base to bias the armature away from the yoke, and that are attached to both ends of the armature. It is equipped with a pair of cards that drive the contacts as the armature moves, and since the armature is inserted into the coil, the armature acts as the iron core of the coil, reducing magnetic flux leakage. High magnetic efficiency can be obtained without causing
Moreover, since the armature is placed inside the coil,
This has an advantage α in that the space for arranging the parts is effectively used, leading to miniaturization. In addition, since both ends of the armature are supported by return springs, the armature moves in parallel in a direction perpendicular to the axial direction of the coil, making the stroke of the card constant regardless of the mounting position of the card on the armature. Furthermore, since a pair of cards are provided at both ends of the armature in the longitudinal direction to drive the contacts to open and close, it has the advantage that the distance between the contact poles can be increased.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing Embodiment 1 of the present invention, Fig. 2 is an explanatory diagram of the same operation as above, Fig. 3 is a sectional view showing Embodiment 2 of the present invention, and Fig. 4 is an optical illusion diagram of the main part of the above. , FIG. 5 is a schematic configuration diagram showing a conventional example. 2 is an armature, 3 is a base, 12 is a coil, 13 is a magnetic pole piece, 14 is a yoke, 22.43 is a return spring, 30a, 30
b is a contact point, 31.41 is a card 6 agent patent attorney 1) 艮 72...armature 3...base I2...coil 22.43...return spring Fig. 2 Fig. 3 figure

Claims (1)

[Claims] (1) A cylindrical coil fixed in a fixed position on the base,
An armature is inserted into the coil along the axial direction with both ends protruding from the coil, and is disposed so as to be movable in one direction perpendicular to the ring direction of the coil. A yoke has a pair of magnetic pole pieces arranged facing each other, and the two magnetic pole pieces are magnetically coupled to each other around the outer periphery of the coil, and a yoke that is interposed between both ends of the armature and the base, An electromagnetic relay comprising: a pair of return springs that are biased in a direction to pull away from the armature; and a pair of cards that are attached to both ends of an armature and drive contacts as the armature moves. .