JP2919443B2 - Electromagnet device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet apparatus, and more particularly, to a monostable electromagnet apparatus used for a driving device such as a relay. 2. Description of the Related Art Generally, an electromagnet device of this type is disclosed in Japanese Patent Application Laid-Open No. 57-15327.
It consists of a coil block around which a coil is wound around an intermediate piece of iron core formed in a substantially U-shape, and an armature whose both ends are opposed to both end faces of the iron core. An armature block that is pivotally supported at a fulcrum provided at a position, and a magnet piece in which one magnetic pole surface abuts the intermediate piece of the iron core and the other magnetic pole face faces the amateur, A closed magnetic path that passes through the amateur and the magnet piece is formed. The electromagnet device is a bistable one. A magnet piece is mounted at a position corresponding to the longitudinal center of the intermediate piece of the coil block, and a fulcrum of the amateur block is positioned at a position corresponding to the center of the magnet piece. Have been allowed. [0003] Further, as a configuration for performing a monostable operation with this bistable electromagnet device, conventionally, a magnetic pole surface formed at both ends of an iron core and both ends of an armature corresponding to each magnetic pole surface are formed. There is known one in which a resituation plate for increasing the magnetic resistance is inserted into one of a pair of gaps. In other words, the use of the reciprocal plate allows the attraction force between the magnetic pole surface and the armature in each gap to be different to perform a monostable operation. [0004] However, in the above-mentioned prior art, the presence of the residual plate between the armature and the magnetic pole surface causes at least the residual between the armature and the magnetic pole surface. Since a gap equal to or more than the thickness of the plate is required, the stroke of the amateur as a whole increases, and it becomes difficult to increase the sensitivity. In recent years, as another example of performing monostable operation with this type of electromagnet apparatus, there has been provided one disclosed in Japanese Patent Application Laid-Open No. Sho 59-143235. In the above electromagnet apparatus, the magnet piece is arranged at a position shifted from one of the magnetic poles of the iron core from a straight line connecting the center of the intermediate piece of the iron core and the fulcrum of the amateur block. In the case of such a conventional example, since the magnet piece is shifted with respect to the fulcrum, it is possible to perform a monostable operation without using a residual plate. However, since the position of the fulcrum and the position of the magnet piece are separated, The magnetic gap between the armature block and the magnet piece when energizing is stopped and the coil is restored after the coil is energized becomes large. Problem. SUMMARY OF THE INVENTION The present invention has been made in view of the above description, and has been made capable of performing a monostable operation without using a lithographic plate so that an amateur can operate with a small stroke and high sensitivity. Another object of the present invention is to provide an electromagnet device that can be reduced in size. [0007] In order to solve the above-mentioned problems, an electromagnet apparatus of the present invention comprises an iron core 1 formed in a substantially U-shape.
A coil block 1 in which a coil 13 is wound around one intermediate piece, and an armature 21 having both ends opposed to both end faces of the iron core 11 are provided at fixed positions between both leg pieces of the iron core 11. Amateur block 2 supported at a fulcrum
And a magnet piece 16 in which one pole face abuts the intermediate piece of the iron core 11 and the other pole face faces the armature 21, and a closed magnetic path passing through the iron core 11, the armature 21 and the magnet piece 16 is provided. In the electromagnet device to be formed, the magnet piece 16 is disposed at a position shifted from a straight line connecting the center of the intermediate piece of the iron core 11 and the fulcrum of the amateur block 2 to one of the magnetic poles of the iron core 11. In addition, the fulcrum of the armature block 2 is positioned within the range of the width of the magnet piece 16 in the same direction as the longitudinal direction of the armature 21, and the positions of the fulcrum of the armature block 2 are substantially U-shaped. The height level of each magnetic pole surface is substantially the same as the height level of each pole face. Since the magnet piece 16 is arranged at a position shifted toward one of the magnetic poles of the iron core 11 from a straight line connecting the center of the intermediate piece of the iron core 11 and the fulcrum of the amateur block 2, A monostable operation can be performed without using a residual plate. Also, the magnet pieces 16 in the same direction as the longitudinal direction of the amateur 21
The fulcrum portion of the armature block 2 is located within the range of the width of the armature 21 so that the fulcrum portion and the magnet piece 16 are located close to each other in the longitudinal direction of the armature 21 and the coil 13
The magnetic gap between the armature 21 and the magnet piece 16 when the power is stopped and the power is restored from the state where the power is applied to the magnet 21 can be reduced, and the operation can be performed efficiently without requiring a large return force. In the above-mentioned electromagnet apparatus, the rotating shaft 23 as a fulcrum of the armature block 2 is provided with the armature 2.
It is also preferable that the rotating shaft 23 is provided so as to protrude from both sides in the width direction and that at least a lower portion of the rotating shaft 23 protrudes below the lower surface of the amateur 21. An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the coil block 1 has a substantially U-shaped iron core 11 opened upward, and a cylindrical coil frame 12 formed of a molded product through which an intermediate piece of the iron core 11 is inserted. And a coil 13 wound around the coil frame 12. The iron core 11 and the coil frame 12 are integrally formed, and the coil frame 12 is integrally formed into a shape having flanges 17 at both ends in the axial direction and a support base 14 at the outer periphery of an intermediate portion in the axial direction. . The support base 14 has a magnet insertion groove 15 formed by opening the upper surface. Both ends of the opening edge of the magnet insertion groove 15 in the direction orthogonal to the axial direction of the coil frame 12 are supported as fulcrum bearings. A groove 18 is formed. A rectangular parallelepiped magnet piece 16 magnetized in the vertical direction is placed in the magnet insertion groove 15 such that one of the magnetic pole faces is in contact with the iron core 11 and the other magnetic pole face is aligned with the lower end of the fulcrum receiving groove 18. Is inserted. here,
Since the support base 14 is formed at an intermediate portion of the coil frame 12 in the axial direction, the coil 13 is wound around both ends of the coil frame 12 with the support base 14 interposed therebetween. The support base 14 is formed at a position slightly to the left of the center in FIG. 1 in the longitudinal direction of the intermediate piece of the iron core 11, and a fulcrum receiving groove 18 formed at the upper end of the support base 14 is It is formed corresponding to the center in the longitudinal direction of the intermediate piece. The armature block 2 includes an armature 21 formed of a magnetic material and formed in a substantially rectangular flat plate shape.
1 and a support member 22 which is a molded product integrally formed with the armature 21 at a central portion in the longitudinal direction. At both ends in the width direction of the amateur 21 and from the side surface of the support member 22, rotating shafts 23, which are fulcrums, are integrally provided, and the rotating shafts 23 are provided in the fulcrum receiving grooves 18 of the coil block 1. The armature block 2 is mounted so as to be swingably supported with respect to the coil block 1. The lower portion of the rotating shaft 23 projects below the lower surface of the amateur 21 as shown in the figure. With the amateur block 2 supported by the coil block 1, the lower surfaces at both ends of the amateur 21 in the longitudinal direction face the respective magnetic pole surfaces of the iron core 11. When the armature block 2 is mounted on the coil block 1, the magnet piece 16 is positioned between the center of the intermediate piece of the iron core 11 and the armature block 2.
Is positioned closer to the left magnetic pole of the iron core 11 from the straight line connecting the rotating shaft 23 of the
The rotation shaft 23 of the amateur block 2 is positioned within the width of the magnet piece 16 in the same direction as the longitudinal direction of the armature 1. Further, the position of the rotating shaft 23 of the amateur block 2 is set to be substantially the same as the height level of each magnetic pole surface at both ends of the substantially U-shaped iron core 11. The operation will now be described. The magnet piece 16 is disposed on the left side in the figure of the middle piece of the iron core 11 in the longitudinal direction. However, amateur 2
Considering the closed magnetic path of the iron core 11 → the armature 21 → the magnet piece 16 → the iron core 11 on both sides of the armature 1, the armature in FIG. 1 is obtained from the length of the magnetic path and the positional relationship between the rotating shaft 23 and the magnet piece 16. The suction force with the iron core 11 at the left end of 21 is greater than the suction force with the iron core 11 at the right end. That is, the left end of the armature 21 is attracted to the iron core 11 when the coil 13 is not energized.
As described above, it is possible to perform a monostable operation in which the left end of the amateur 21 is the normally closed end (NC) and the right end is the normally open end (NO). When the coil 13 is energized, one end of the armature 21 in the longitudinal direction is attracted to one of the magnetic poles of the iron core 11 according to the direction of magnetization of the iron core 11, and the armature block 2 swings, and the iron core 11 → amateur It goes without saying that a closed magnetic path of 21 → magnet piece 16 → iron core 11 is formed. In addition, since the coil block 1 and the amateur block 2 are accurately positioned, characteristics such as attractive force are stable, and a stable operation can be performed when used as an electromagnet device for driving a contact point of a relay. It is. According to the present invention, there is provided a coil block in which a coil is wound around an intermediate piece of an iron core formed in a substantially U-shape as described above, and both end portions are respectively provided on both end surfaces of the iron core. An armature block having an opposed armature and pivotally supported at a fulcrum provided at a substantially central fixed position between both leg pieces of the iron core and arranged to be swingable with respect to the coil block; A magnet piece that abuts on the intermediate piece of the core and the other magnetic pole face of which faces the amateur, and wherein a closed magnetic path passing through the iron core, the armature and the magnet piece is formed, Since it is located at a position shifted toward one of the magnetic poles of the iron core from a straight line connecting the center of the piece and the fulcrum of the amateur block, it is possible to perform a monostable operation without using a residual plate Can be As a result, the stroke of the amateur becomes smaller,
It has the advantage of operating with high sensitivity. Also, since the position of the fulcrum portion of the amateur block is substantially the same as the height level of each magnetic pole face at both ends of the substantially U-shaped iron core, the amateur block should be as close as possible to the coil block. An amateur block can be attached, the height of the electromagnet device can be made as low as possible, and if it is used as an electromagnet device for driving the contacts of a relay, a thin seesaw type relay can be obtained. Since it does not become large, high-sensitivity operation is possible. In addition, since the fulcrum of the armature block was located within the range of the width of the magnet piece in the same direction as the longitudinal direction of the amateur, the magnet piece was shifted from one of the magnetic poles of the iron core from the fulcrum of the amateur block. Even when the armature is arranged to perform monostable operation, the fulcrum and the magnet piece are located at positions close to each other in the longitudinal direction of the armature, and the armature is used to stop energizing and return from energizing the coil. The magnetic gap between the magnet piece and the magnet piece can be reduced, and it can be operated efficiently without requiring a large return force, and does not require the use of a magnet piece having a large magnetic force. If used as a driving electromagnet device, the size and thickness of the relay can be reduced. According to a second aspect of the present invention, a rotating shaft as a fulcrum of the armature block is provided so as to protrude from both sides in the width direction of the armature, and at least a lower portion of the rotating shaft is lower than a lower surface of the armature. As a result, the stroke (degree of inclination) of the armature block can be obtained by the protruding height at which the lower surface of the rotating shaft projects from the lower surface of the armature block. If it is provided within the range, it is necessary to provide notches at the upper end of both sides orthogonal to the plane with the fulcrum receiving groove of the support base for the stroke that the amateur moves up and down, and the structure of the support base becomes complicated Assembly and fabrication are complicated).

[Brief description of the drawings] FIG. 1 is a side view of an example of an embodiment of the present invention. FIG. 2 is an exploded perspective view of the same. FIG. 3 is an operation explanatory diagram of the above. [Explanation of symbols] 1 Coil block 2 Amateur block 11 Iron core 13 coils 16 magnet pieces 18 fulcrum receiving groove 21 amateur 23 Rotation axis

Claims (1)

(57) [Claims] A coil block around which a coil is wound around an intermediate piece of iron core formed in a substantially U shape, and an armature having both ends facing the both end faces of the iron core, respectively, in a fixed position between both leg pieces of the iron core. An armature block that is pivotally supported at the provided fulcrum portion, and a magnet piece in which one magnetic pole surface abuts an intermediate piece of the iron core and the other magnetic pole face faces the amateur, and the iron core, the armature, and the magnet piece In the electromagnet apparatus in which a closed magnetic path is formed, the magnet piece is disposed at a position shifted from a straight line connecting the center of the intermediate piece of the iron core and the fulcrum of the amateur block toward one of the magnetic poles of the iron core. At the same time, the fulcrum of the armature block is located within the range of the width of the magnet piece in the same direction as the longitudinal direction of the armature, and the position of the fulcrum of the armature block is substantially U-shaped. Surface height level and Electromagnet apparatus characterized by being identical in height levels. 2. A coil block around which a coil is wound around an intermediate piece of iron core formed in a substantially U shape, and an armature having both ends facing the both end faces of the iron core, respectively, in a fixed position between both leg pieces of the iron core. An armature block that is pivotally supported at the provided fulcrum portion, and a magnet piece in which one magnetic pole surface abuts an intermediate piece of the iron core and the other magnetic pole face faces the amateur, and the iron core, the armature, and the magnet piece In the electromagnet apparatus in which a closed magnetic path is formed, the magnet piece is disposed at a position shifted from a straight line connecting the center of the intermediate piece of the iron core and the fulcrum of the amateur block toward one of the magnetic poles of the iron core. At the same time, the fulcrum of the armature block is positioned within the range of the width of the magnet piece in the same direction as the longitudinal direction of the armature, and the rotating shaft as the fulcrum of the armature protrudes from both sides in the width direction of the armature. And at least a lower portion of the rotating shaft is projected below the lower surface of the armature, and the position of the fulcrum of the armature block is substantially the same as the height level of each pole face at both ends of the substantially U-shaped iron core. An electromagnet device characterized by being at the highest level.