JP4380058B2 - Electromagnet drive device and electromagnetic relay - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an electromagnet driving device and an electromagnetic relay using a permanent magnet.
[0002]
[Prior art]
  Conventional electromagnet driving devices used for bistable electromagnetic relays have a configuration as shown in FIG. In FIG. 31A, the permanent magnet 2 is suspended from the center of the central piece 1c of the U-shaped iron core 1 so as to be in contact with the magnetic pole faces of the magnetic pole pieces 1a and 1b composed of side pieces on both sides of the iron core 1. Both ends of the pole 3 are made to face each other, and a fulcrum made of a projection 5 provided on the lower center surface of the armature 3 is arranged on the upper end surface of the permanent magnet 2 so that the armature 3 can move freely. In this case, the contact springs 4a and 4b having their respective free ends extended in both end directions are held by the armature 3, and the movable contacts 6a and 6b on the lower surfaces of the front portions of the contact springs 4a and 4b are opposed to the fixed contacts 7a and 7b. 2a and 2b type electromagnetic relays are constructed in which one contact portion is turned on and the other contact portion is turned off by the seesaw operation of the armature 3. In this case, the coil for exciting is mounted, for example, at the central portion of the central piece 1c of the iron core 1.
[0003]
  The operating state of the armature 3 is maintained by the magnetic poles of the permanent magnet 2 even when the excitation current to the coil is turned off. In the reverse operation, the armature 3 is energized in a direction that cancels the attractive force of the attracting permanent magnet 2, and the hinge spring The reversing force of the armature 3 and the attractive force acting at the opposite end of the armature 3 cause the armature 3 to reversely move around the fulcrum, turning off the contact portion that was turned on and turning on the contact portion that was turned off. It has become.
[0004]
  In this electromagnetic relay, as shown in FIG. 31 (b), the spring load (X) is symmetric, and the attractive force characteristic (I) by the permanent magnet 2 when not excited is also symmetric. II) and reversal motion suction characteristics (III) are symmetrical.
[0005]
  By the way, when a 2a (1a) type electromagnetic relay is constituted using the same electromagnet driving device, the contact spring 4a is provided only on one side as shown in FIG.
[0006]
  Accordingly, the spring load characteristic (X) is asymmetric as shown in FIG. In this case, when the exciting current is supplied to the coil to keep the on operation state, the moving voltage becomes high, and when the self-holding type by the magnetic force of the permanent magnet 2 is used, the set voltage (voltage to turn on) becomes high.
[0007]
[Problems to be solved by the invention]
  In order to solve the problem of the example of FIG. 14, when the coil 8 is mounted on the magnetic pole piece 1b on the contact spring 4b side as shown in FIG. 33 (a), as shown in FIG. 33 (b), The excitation attractive force increases, and the range of the attractive force expands with respect to the attractive force when there is no excitation, but the attractive force characteristics when there is no excitation remain symmetrical, making it difficult to match the asymmetric spring load. The problem is not solved.
[0008]
  The present invention has been made in view of the above-described points, and the object thereof is to asymmetric the attractive force during non-excitation and excitation so as to widen the width between the excitation attractive force and the non-excitation attractive force. An electromagnetic drive device that can easily match the spring load characteristics even when used as a drive device for a device having an asymmetric spring load, and an asymmetric spring load when configuring a relay of type 2a (1a) Therefore, it is an object of the present invention to provide an electromagnetic relay capable of exhibiting stable performance.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, according to the first aspect of the present invention, a substantially U-shaped iron core having pole pieces parallel to both sides and the iron core is mounted.twoCorresponding to one end of the armature, one end of the armature, and one end of the armature corresponding to the one end of the armature. A permanent magnet that forms a closed magnetic path with the iron core through the tip pole face of the iron core pole piece and attracts one end of the armature to the tip pole face of the corresponding iron core leg piece, and the coil has a magnetic force of the permanent magnet In the electromagnet drive device that allows the armature to be reversed by passing an exciting current in the direction of eliminatingThe coils are mounted on the iron core position from the position where the fulcrum of the armature is offset to the position including the pole pieces on both sides, and each coil has a different number of turns.It is characterized by that.
[0010]
  ContractClaim2In the invention of claim 1, in the invention of claim 1, a permanent magnet magnetized with different magnetic poles at both ends is used as the permanent magnet, and one end is provided on both sides of the iron core so that both end directions are parallel to the magnetic pole pieces of the iron core. Arranged on the horizontal piece of the iron core at a position deviated from the center between the pole pieces, and the fulcrum of the armature is arranged between the arrangement position of the permanent magnet and the magnetic pole piece of the iron core closer to the arrangement position. It is characterized by that.
[0011]
  ContractClaim3In the invention of claim 1, in the invention of claim 1, both ends of the permanent magnet are magnetized to have the same polarity, and the permanent magnets are magnetized to have different polarities in the middle portion that is biased from the center of both ends. Both ends are arranged so as to be in contact with the inner surface of the tip of the pole piece on both sides of the iron core, and the fulcrum of the armature is positioned near the magnetized position of the intermediate portion of the permanent magnet and the magnetized position. It arrange | positions between the said magnetic pole pieces of the said iron core, It is characterized by the above-mentioned.
[0012]
  ContractClaim4The invention of claim 1 is characterized in that, in the invention of claim 1, the permanent magnet is integrally attached so as to be parallel to the armature.
[0013]
  ContractClaim5In the invention of claim4In the invention, when the permanent magnet is attached to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core.BothThe fulcrum of the armature is arranged at a position corresponding to between the center position of the permanent magnet and the magnetic pole piece of the iron core closer to the center position.
[0014]
  ContractClaim6In the present invention, a substantially U-shaped iron core having pole pieces parallel to both sides and the iron core is mountedtwoCorresponding to one end of the armature, one end of the armature, and one end of the armature corresponding to the one end of the armature. An electromagnet block is constituted by a permanent magnet that forms a closed magnetic path with the iron core through the tip magnetic pole face of the iron core pole piece and attracts one end of the armature to the tip pole face of the corresponding iron leg piece. A block is arranged on the body, and the armature is arranged parallel to the armature, one end is attached to the armature, and the movable arm is provided at the other end extending in the direction of the end of the armature. A contact spring that faces the fixed contact disposed on the body, and causes the movable contact to contact and separate from the fixed contact in accordance with a seesaw operation of the armature, and the coil has a magnetic force of a permanent magnet. By passing an exciting current in the direction to cancel The electromagnetic relay which allows inversion, from both sides of the center between the pole pieces of the iron core, the fulcrum of the permanent magnet and the armature in a position offset in the opposite direction is provided to the end direction of the contact springThe coils are mounted on the iron core position from the position where the fulcrum of the armature is offset to the position including the pole pieces on both sides, and each coil has a different number of turns.It is characterized by that.
[0015]
  ContractClaim7In the invention of claim6In the invention, the permanent magnet is integrally attached so as to be parallel to the armature.
[0016]
  ContractClaim8In the invention of claim6 or 7In the invention, the contact spring is provided with a hinge spring in which one end is fixed to the armature and the other end is fixed on the body from a direction opposite to the other end direction.
[0017]
  Claim9In the invention of claim8In the invention, the hinge spring is substantially U-shaped, and at least the plate surfaces of both side pieces are set in the same direction as the plate surface of the contact spring, the tip of one side piece is fixed to the armature, and the other side piece is The front end of the side piece is fixed on the body by being arranged side by side on the armature.
[0018]
  Claim10In the invention of claim9In the present invention, the central piece of the hinge spring is bent so that the plate surface is perpendicular to the plate surfaces of both side pieces.
[0019]
  Claim11In the invention ofClaims 8 to 10In the invention, the position of the hinge spring held on the body is in the vicinity of the fulcrum position of the armature.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present inventionAnd reference examplesWill be described.
[0021]
  (Reference example1)
  BookReference exampleAs shown in FIG. 1 (a), the electromagnet driving device has, for example, a lower end at the S pole (or N The permanent magnet 24 having its upper end magnetized to the N pole (S pole) is suspended, and the seesaw operation fulcrum of the armature 50 is displaced from the center position corresponding to the upper end surface of the permanent magnet 24. For example, the coil 41 is attached to the magnetic pole piece 20b of the iron core 20 closer to the center position.
[0022]
  Next bookReference exampleNext, the suction force characteristics will be described.
[0023]
  First, in FIG. 2A, when the armature 50 has an attractive force F1 in the portion a in the drawing, the force Fα that moves the portion A in the direction away from the magnetic pole piece 20b of the iron core 20 is expressed by the following equation (1). It is obtained by
[0024]
  Fα = F1 (1)
  Next, as shown in FIG. 2B, the force Fβ that moves the end of the armature 50 toward the pole piece 20b in the state where the end of the armature 50 is attracted to the pole piece 20a is as follows. Become.
[0025]
  Here, the distance from the fulcrum position of the armature 50 to the end on the pole piece 20b side is defined as l.₁And the distance to the end on the pole piece 20a side is l₂Assuming that the suction force on the suction side is F2, Fβ is obtained by the following equation (2).
[0026]
  Fβ × l₁= F2 × l₂
  Fβ = F2 × l₂/ L₁            ... (2)
  Here, when the magnetic resistance in the iron core 20 and the armature 50 is considered to be negligible compared to the magnetic resistance in the air gap, the left and right attractive forces F1 and F2 are considered to be equivalent.
[0027]
  Therefore, from equations (1) and (2), l₁<L₂In this case, Fα> Fβ, and a left-right asymmetric attractive force as shown in FIG. 3 is obtained when there is no excitation.
[0028]
  On the other hand, as described above, when the coil 41 is attached to the magnetic pole piece 20b of one iron core 20 with the permanent magnet 24 disposed at the center as shown in FIG. The characteristics of the magnet 24 (attraction force) are symmetrical on the coil mounting side and non-mounting side, as shown by (I) in FIG. 15B. As shown by the curves (II) and (III), the width of each attractive force at the time increases on the coil mounting side.
[0029]
  BookReference exampleWhen the position of the permanent magnet 24 is also biased as shown in FIG. 3, the attractive force characteristic by the permanent magnet 24 becomes asymmetric as shown in FIG. 3, and as a result, the attractive force characteristic as shown in FIG. 1B is obtained. Incidentally, (I) shows the characteristics of the attractive force during non-excitation, and (II) and (III) show the characteristics of the attractive force at the time of operation suction and at the time of return suction.
[0030]
  BookReference exampleAccording to the configuration, the attractive force characteristic is asymmetric both during non-excitation and during excitation, so that an effective electromagnet drive device can be realized when an unbalanced load is applied.
(Reference example2)
  BookReference exampleIsReference exampleAs shown in FIG. 4, both ends of the permanent magnet 24 are magnetized to the same magnetic pole as shown in FIG. 4, and the positions displaced from the center are magnetized to different magnetic poles. Using magnets, both ends of the permanent magnet 24 are bridged so as to be in contact with the inner side surfaces of the tip portions of both side magnetic pole pieces 20a and 20b of the iron core 20, and the fulcrum of the armature 50 is formed at the magnetic pole position deviated from the center. The protrusion 54 to be arranged is arranged.
[0031]
  BookReference exampleAlso in the case ofReference example1 can be obtained.
(Reference example3)
  BookReference exampleAs shown in FIG. 5, for example, a permanent magnet 24 magnetized with different polarities at both ends is provided on the armature 50 side, and the center position Y is biased according to the position of the fulcrum.
(Reference example4)
  BookReference exampleIsReference example2a-type electromagnetic relay configured using an electromagnet driving device as shown in FIG. 1, and the distance from the fulcrum position to the end of the armature 10 is long as shown in FIG. The contact spring 52 is held by the armature 50 so as to be parallel to the part of the armature 10, and the fixed contact 21 is provided so as to face the movable contact 52 a provided on the bottom surface of the contact spring 52. Is asymmetric. Figure 6 (b) shows the bookReference exampleIn principle, the suction force characteristics ofReference example1. As shown in FIG. 1, (I) shows the attractive force characteristic during non-excitation, (II) shows the attractive force characteristic during the suction operation, and (III) shows the attractive force characteristic during the return operation. . Therefore, the asymmetrical attractive force characteristic facilitates matching with the asymmetric spring load.
[0032]
  More details in FIGS.Reference exampleWill be explained.
[0033]
  BookReference exampleAs shown in FIGS. 7 and 8, the electromagnetic relay is a terminal plate 22 provided with a connecting surface 27a to which one end of a hinge spring 26 provided on a contact block Bb and a terminal plate 22 provided with an iron core 20 and a fixed contact 21 is fixed. A box having a bottom opening made of synthetic resin by assembling an armature block Bb, a coil block Bc, and a permanent magnet 24 to a body block Ba composed of a body 23 made of a synthetic resin molded product formed by inserting 27 It is comprised by adhere | attaching the shape case 25 on body block Ba.
[0034]
  The iron core 20 is formed by punching a magnetic iron plate into a U-shape. The iron core 20 is inserted and fixed to the body 23 when the body 23 is formed, and magnetic pole pieces 20a and 20b on both sides are protruded on the body 23. The insert position of the iron core 20 is on a line passing through the center in the short direction of the body 23 and is deviated to one side with respect to the center point in the longitudinal direction. One pole piece 20a is closer to one end edge side of the body 23. The other pole piece 20b is closer to the center so as to be separated from the other end edge of the body 23. A rectangular tube portion 28 is integrally formed on the body 23 along the inner side of the one magnetic pole piece 20a. The square tube portion 28 is biased toward the one magnetic pole piece 20a side at the center, on the upper surface of the central piece 20c of the iron core 20 into which the lower end portion is inserted and from the center position between the magnetic pole pieces 20a and 20b on both sides. A hole 29 having a square cross section reaching the position is provided in the vertical direction.
[0035]
  A prismatic permanent magnet 24 having substantially the same cross-sectional shape is inserted into the hole 29 by press-fitting or insertion from above. The permanent magnet 24 is magnetized with magnetic poles having different upper and lower ends, the magnetic pole surface of the lower end surface is attracted to the upper surface of the central piece 20c of the iron core 20, and the upper end magnetic pole surface is above the upper end surface of the rectangular tube portion 28. And is positioned at substantially the same height as the magnetic pole surfaces of the magnetic pole pieces 20a and 20b of the iron core 20. The permanent magnet 24 may be a magnet that has been previously magnetized, but when it is incorporated into the body 23, it may be a magnet that is magnetized after being incorporated without being magnetized.
[0036]
  Side walls 30, 30 are integrally formed on both sides of the body 23 so as to be parallel to the iron core 20. A part of the terminal plate 22. 27 are led out to form grooves 31 and 32 for leading terminals 33 and 34 provided at the front portions of the respective terminal plates 26 and 27 to the lower surface side of the body 23. The fixed contact 21 provided at one end of the terminal plate 22 is exposed on the upper surface of the side wall 30 parallel to the magnetic pole piece 20b, and the upper surface near the center of the side wall 30 is exposed to one end of the terminal plate 27. The provided joint surface 27a is exposed.
[0037]
  A low-rise standing wall 35 formed so that one end reaches the end face of the side walls 30, 30 is integrally provided at the end of the body 23 on the pole piece 20b side, and a central portion of the standing wall 35 will be described later. A notch 36 for fitting the end 38a of the flange 38 of the coil bobbin 37 of the coil block Bb is formed.
[0038]
  As shown in FIG. 9, the coil block Bb is substantially the same as the cross section of the magnetic pole piece 20 b at the center, and has the above-described coil bobbin 37 in which the central through-hole 39 for inserting the magnetic pole piece 20 b is formed. A coil terminal 42, to which a coil 41 is connected to both side surfaces of the lower flange 38 near the end 38a. 42 protrudes. The coil terminals 42 and 42 are bent in an inverted L shape and extend downward. Locking protrusions 43 and 43 for fixing the insulating case 44 attached to the coil block Bc are integrally formed on both side surfaces of the flange portion 38.
[0039]
  Further, the opening of the central through hole 39 of the upper flange portion 40 is surrounded by ribs 48 in three directions other than the portion where the end portion of the armature 50 of the armature block Bb described later faces. The rib 48 is formed so as to be higher than the tip end position of the magnetic pole piece 20 b protruding upward from the opening of the central through hole 39.
[0040]
  The insulating case 44 is made of a synthetic resin molded product and has a box shape with an opening on the lower surface. When the coil block Bc is attached to the lower end edges of a pair of opposing side walls, the lower end rides on the taper surfaces of the locking projections 43 formed on both side surfaces of the flange portion 38 of the coil bobbin 37 from the inside. An elastic protruding piece 47 provided with a locking hole 46 for locking the locking projection 43 is integrally provided, and the insulating case 44 is attached to the coil block Bb with one touch by the locking projection 43 and the locking hole 46. It can be fixed.
[0041]
  As shown in FIG. 7, when the coil block Bb with the insulating case 44 attached thereto is assembled to the base block Ba, the tip of the magnetic pole piece 20b is inserted from the lower surface opening of the central through hole 39 of the coil bobbin 37 and the coil terminal 42 is simultaneously inserted. The front end of the coil bobbin 37 is placed on the body 23 while the front end is inserted into the coil terminal hole 49 opened on both upper surfaces of the body 23 near the ends of the side walls 30, 30. Is fitted into the notch 36 of the standing wall 35. At this time, the end surface of the end portion 38 a is substantially flush with the outer surface of the standing wall 35.
[0042]
  The armature block Bb includes an armature 50 made of a magnetic material and arms in both directions of the armature 50 at a position where the central portion of the armature 50 is inserted and biased to one end side with respect to the center position of the armature 50. T-shaped synthetic resin molded body 53 from which the bodies 51, 51 are projected, and each arm body 51 of the synthetic resin molded body 53, and forward from the surface of each arm body 51 facing the center side of the armature 50. The contact springs 52, 52 that protrude, and the U-shaped hinge spring 26 that extends from the rear end of each contact spring 52, 52 and protrudes rearward from the surface of the arm body 51 opposite to the surface from which the contact spring 52 protrudes. , 26.
[0043]
  The length of one side piece that the hinge spring 26 can protrude from the arm body 51 is made slightly shorter than the length of the portion of the armature 50 that protrudes from the synthetic resin molded body 53 and is parallel, and is folded back from the center piece to be bent. The length of the other side piece parallel to the length of the other side piece is such that the tip thereof substantially corresponds to the longitudinal center of the armature 50.
[0044]
  The front part of each contact spring 52 is divided into two forks, and a movable contact is provided on each lower surface to form a so-called twin contact.
[0045]
  The longitudinal dimension of the armature 50 is slightly larger than the longitudinal dimension of the iron core 20 so that the lower surfaces of both ends of the armature 50 can be opposed to the magnetic pole surfaces of the magnetic pole pieces 20a and 20b when the armature 50 is disposed above the iron core 20. A protrusion 54 is formed to protrude at a lower surface position that is deviated from the center position and is opposed to the upper end surface of the permanent magnet 24 mounted between the magnetic pole pieces 50a and 50b. Is mounted on the upper end surface of the slab so as to freely move the seesaw, and constitutes a fulcrum of the seesaw operation.
[0046]
  The armature block Bb configured as described above is assembled to the base block Ba after the coil block Bc is assembled as described above, and the protrusion 54 is placed on the upper end surface of the permanent magnet 24 and the both sides The distal end portions of the outer side pieces of the hinge springs 26, 26 are fixed to the joint surface 27a of the terminal plate 27 exposed on the substantially central upper surface of the side walls 30, 30 of the base block Ba by welding.
[0047]
  As a result, the movable contacts on the lower surfaces of the tips of the contact springs 52, 52 on both sides are respectively arranged to face the fixed contact 21, and the lower surfaces of both ends of the armature 50 are arranged to face the magnetic pole surfaces of the magnetic pole pieces 20a, 20b of the iron core 20. .
[0048]
  If the case 25 is attached to the body block Ba after the coil block Bc and the armature block Bb are assembled to the body block Ba in this way, the 2a type electromagnetic relay shown in FIG. 8D is obtained. Become. When the case 25 is attached, the downward stepped portion 25a, which is a projection provided on the inner wall surface on the coil block Bc side, sandwiches the end portion 38a of the flange portion 38 of the coil bobbin 37 with the body 23 as shown in FIG. The coil block Bc including the coil bobbin 37 is securely fixed to the body block Ba. A downward step 25b is also provided on the inner wall surface of the case 25 on the pole piece 20a side, and this downward step 25b rides on the upper surface of the body 23 near the exposed base of the pole piece 20a.
[0049]
  BookReference exampleIn the normal electromagnetic relay, the end close to the fulcrum position of the armature 50 is attracted and held on the magnetic pole surface of the magnetic pole piece 20a by the spring biasing force of the hinge springs 26, 26 and the magnetic force of the permanent magnet 24, and the contact spring 52 is held. , 52 are separated from the fixed contact 21. In this case, the iron core 20 including the permanent magnet 24, the armature 50, and the magnetic pole piece 20a forms a closed magnetic circuit, and the operating state of the armature 50 is maintained.
[0050]
  In this state, an attractive force larger than the spring load of the hinge springs 26 and 26 is combined with the magnetic force of the permanent magnet 24 in the direction to cancel the magnetic force of the permanent magnet 24 on the magnetic pole piece 20a side of the iron core 20 and is generated on the magnetic pole piece 20b side. When an exciting current is passed through the coil 41 through the coil terminals 42, 42, the armature 50 performs a seesaw operation in the counterclockwise direction in FIG. Is adsorbed to the magnetic pole surface of the magnetic pole piece 20b. At this time, the contact springs 52 and 52 elastically contact the movable contacts at the tips with the fixed contacts 21 and 21 to turn on the terminals 33 and 34 of the terminal plates 22 and 27. This state is maintained by continuing the excitation current. FIGS. 8B and 8C show the operation in progress.
[0051]
  When the exciting current is turned off, the return force of the hinge springs 26 and 26 and the contact springs 52 and 52 is larger than the attractive force on the magnetic pole piece 20b side by the permanent magnet 24, so the armature 50 supports the protrusion 54 in the clockwise direction. And the attraction force due to the magnetic force of the permanent magnet 24 generated on the side of the magnetic pole piece 20a is also applied to return to the normal state described above. As a result, the movable contacts of the contact springs 52, 52 are separated from the fixed contacts 21, 21, and are turned off. Here, when the return force due to the spring bias is smaller than the attractive force due to the magnetic force of the permanent magnet 24, the operating state of the armature 50 is maintained by the magnetic force of the permanent magnet 24 even when the excitation current is turned off. Can do. Therefore, when returning to the contact-off state, an excitation current is supplied to the coil 41 in a direction to cancel the magnetic force of the permanent magnet 24.
[0052]
  BookReference exampleThe electromagnetic relay can be selected to be a self-holding type or a type in which an excitation current is passed to hold the on state by appropriately setting a spring load.
[0053]
  By the way, at the time of opening and closing the contact as described above, consumable powder of contact material is generated at the contact portion, and wear powder is generated from the magnetic pole pieces 20a and 20b of the iron core 20 to which the armature 40 is attracted, but the rib 48 of the coil bobbin 37 is generated. Prevents scattering of the above-mentioned wear powder and prevents the consumable powder from moving to the magnetic pole surfaces of the magnetic pole pieces 20a and 20b. Further, the insulation distance between the coil 41 and the magnetic pole piece 20b of the iron core 20 is increased to ensure insulation.
[0054]
  Above bookReference exampleThe permanent magnet 24 is configured to be inserted into the hole 29 of the rectangular tube portion 28, but may be integrated with the body 23 by insert molding in the same manner as the iron core 20. In this case, the step of incorporating the permanent magnet 24 into the body block Ba can be omitted, and not only the reference dimension between the magnetic pole surfaces of the magnetic pole pieces 20a and 20b and the fixed contact 21, but also the reference between these and the magnetic pole surface of the permanent magnet 24. The dimension can be obtained with high accuracy, and as a result, the stroke of the armature 50 can be stabilized.
[0055]
  Also bookReference exampleThen, when the spring adjustment is performed, the center piece of the hinge spring 26 can be adjusted by biasing with a jig or the like.
(Reference example5)
  BookReference exampleAs shown in FIG. 10, the central piece of the hinge spring 26 is bent so as to be perpendicular to the plate surface of the side piece, and during adjustment, the central piece is pinched with a jig from above, and the central piece is against the plate surface. The spring can be adjusted by biasing in the front-rear direction.Reference example4 and different. Since the other configurations are the same as the other configurations in FIG. 7, the same reference numerals are given and description thereof is omitted.
(Reference example6)
  the aboveReference example4 or5Was a permanent magnet 24 suspended,Reference exampleAs shown in FIG. 11, both ends of the permanent magnet 24 are magnetized on the same magnetic pole as both permanent magnets 24, and both ends of the permanent magnet 24 are arranged on both sides of the iron core 20. The bridge pieces are arranged so as to be in contact with the inner side surfaces of the tip portions of the pole pieces 20a and 20b, and the fulcrum of the armature 50 is arranged at the magnetic pole position deviated from the center.
[0056]
(Reference example7)
  BookReference exampleIn the case of FIG. 12, the permanent magnet 24 is provided on the armature 50 side, and the central magnetization position is biased according to the position of the fulcrum.
[0057]
  Each of the aboveReference exampleThen, although both the electromagnet drive device and the electromagnetic relay are provided with one coil 41, the magnetic pole pieces 20a and 20b of the iron core 20 may be provided with coils. In this case, the width of the attractive force on both sides of the fulcrum of the armature 50 can be increased.
(Reference example8)
  the aboveReference example1, the position of the permanent magnet 24 and the position of the fulcrum 54 of the armature 50 are matched.Reference exampleThen, as shown in FIG. 13, the fulcrum 54 of the armature 50 is arranged on the center line X between the two magnetic pole pieces 20 a and 20 a of the iron core 20. When one coil is attached to the iron core 20, as shown in the figure, the position of the coil 41 is the magnetic pole piece 20b having a sufficient space or the horizontal piece 20c between the magnetic pole piece 20b and the arrangement position of the permanent magnet 24. Just install it.
[0058]
  BookReference exampleWith this configuration, the attractive force curve is obtained as shown by the solid line in FIG. 14, and the attractive force on the magnetic pole piece 20b (coil mounting) side in FIG.Reference example1 is the same as in the case of 1, but the attractive force on the pole piece 20a side isReference exampleIt can be made larger than the case of 1 (indicated by a broken line). In other words, an electromagnetic relay as shown in FIG.Reference exampleIs provided with a magnetic circuit having an unbalanced attractive characteristic in which the normally-open (magnetic pole piece 20b) side attracting force remains the same and the normally-closed (magnetic pole piece 20a) side is increased. An electromagnetic relay that can be easily matched can be realized.
[0059]
  (Reference example9)
  BookReference exampleIsReference example2 having the same arrangement structure of the permanent magnets 24 as in FIG.Reference exampleThe suction force is increased in the same manner as in FIG.
[0060]
  That is, as shown in FIG. 15, a permanent magnet 50 is used in which both ends are magnetized to the same polarity (S pole in the figure), and the middle portion deviated from the center in both end directions is magnetized to a different polarity (N pole) The permanent magnet 50 is bridged so that both ends of the permanent magnet 50 are in contact with the inner surfaces of the tip portions of the magnetic pole pieces 20 a and 20 b on both sides of the iron core 20, and the fulcrum 54 of the armature 50 is connected to the magnetic pole pieces 20 a on both sides of the iron core 20. , 20b on the center line X. When one coil is attached to the iron core 20, it may be attached to the magnetic pole piece 20b or the horizontal piece 20c.
[0061]
  BookReference exampleAlso in the case ofReference exampleA suction curve similar to 8 is obtained. Electromagnetic relayReference example6 and the contact structure as shown in FIG. 6, the magnetic force having an unbalanced attraction characteristic in which the normally-open (magnetic pole piece 20b) side attracting force remains the same and the normally-closed (magnetic pole piece 20a) side becomes larger. An electromagnetic relay having a circuit and a magnetic circuit that can easily match an asymmetric spring load can be realized.
[0062]
  (Reference example10)
  BookReference exampleIsReference example3 having a structure in which the permanent magnet 24 is attached to the armature 50 in the same manner as in FIG.Reference exampleThe suction force is increased in the same manner as in FIG.
[0063]
  That is, as the permanent magnet 24, a permanent magnet whose both ends are magnetized with different polarities is used, for example, both end directions of the permanent magnet 24 are parallel to both end directions of the armature, and the center position Y of the permanent magnet 24 is both sides of the iron core 20. The permanent magnet 24 is attached to the armature 50 so as to deviate from the position of the center line X between the magnetic pole pieces 20a, 20b, and the fulcrum 54 of the armature 50 is connected to the pole pieces 20a on both sides of the iron core 20. , 20b on the center line X. When one coil is attached to the iron core 20, it may be attached to the magnetic pole piece 20b or the horizontal piece 20c.
[0064]
  BookReference exampleAlso in the case ofReference exampleA suction curve similar to 9 is obtained. Electromagnetic relayReference exampleWhen the contact structure as shown in FIG. 6 is used, the suction force on the normally open (magnetic pole piece 20b) side remains as it is, and the suction force on the normally closed (magnetic pole piece 20a) side increases. An electromagnetic relay having a magnetic circuit having a force characteristic and having a magnetic circuit that facilitates matching of asymmetric spring loads can be realized.
[0065]
  (Reference example11)
  the aboveReference exampleIn FIG. 8, the fulcrum 54 of the armature 50 is disposed on the center line X between the magnetic pole pieces 20a and 20b of the iron core 20.Reference example17 differs from FIG. 17 in that the position of the fulcrum 54 is closer to the center line X than the position of the permanent magnet 24 on the permanent magnet 24 side of the center line X.
[0066]
  That isReference example8 shows the attractive force on the magnetic pole piece 20a side.Reference exampleThe magnetic circuit is configured so that it is larger than 1.Reference exampleThen, as shown by the solid line in FIG.Reference exampleCompared to 1 (indicated by a broken line), the attractive force on the magnetic pole piece 20b (coil mounting) side is reduced, and the attractive force on the magnetic pole piece 20a side is further increased.
[0067]
  The electromagnetic relayReference exampleWhen the contact structure as shown in FIG. 6 is used, the attraction force on the normally open (magnetic pole piece 20b) side becomes smaller and the attraction force on the normally closed (magnetic pole piece 20a) side becomes larger. An electromagnetic relay having a magnetic circuit having characteristics can be realized, and in particular, in the design of a single type (current holding type) electromagnetic relay, asymmetric spring loads can be easily matched.
[0068]
  (Reference example12)
  the aboveReference example9, the fulcrum 54 of the armature 50 is disposed on the center line X between the magnetic pole pieces 20a and 20b of the iron core 20.Reference example19 is different in that the position of the fulcrum 54 is closer to the center line X than the center line X on the magnetized position (N pole) side of the intermediate portion of the permanent magnet 24, as shown in FIG. It is.
[0069]
  That isReference example9 shows the attractive force on the pole piece 20a side.Reference exampleThe magnetic circuit is configured so that it is larger than 1.Reference exampleThenReference exampleSame as 11Reference exampleCompared to 1, the attractive force on the magnetic pole piece 20b side is reduced, and the attractive force on the magnetic pole piece 20a side is further increased.
[0070]
  The electromagnetic relayReference exampleWhen the contact structure as shown in FIG. 6 is used, the attraction force on the normally open (magnetic pole piece 20b) side becomes smaller and the attraction force on the normally closed (magnetic pole piece 20a) side becomes larger. In particular, in the design of a single type (current holding type) electromagnetic relay, asymmetric spring loads can be easily matched.
[0071]
  (Reference example13)
  the aboveReference exampleIn FIG. 10, the fulcrum 54 of the armature 50 is arranged on the center line X between the magnetic pole pieces 20 a and 20 b of the iron core 20.Reference example20 is different in that the position of the fulcrum 54 is closer to the center position Y side of the permanent magnet 24 than the center line X and closer to the center line X than the center position Y is.
[0072]
  That isReference example10, the attractive force on the magnetic pole piece 20a side isReference exampleThe magnetic circuit is configured so that it is larger than 1.Reference exampleThenReference exampleSame as 11Reference exampleCompared to 1, the attractive force on the magnetic pole piece 20b side is reduced, and the attractive force on the magnetic pole piece 20a side is further increased.
[0073]
  The electromagnetic relayReference exampleWhen the contact structure as shown in FIG. 6 is used, the attraction force on the normally open (magnetic pole piece 20b) side becomes smaller and the attraction force on the normally closed (magnetic pole piece 20a) side becomes larger. In particular, in the design of a single type (current holding type) electromagnetic relay, asymmetric spring loads can be easily matched.
[0074]
  (Reference example14)
  the aboveReference example11 is arranged such that the fulcrum 54 of the armature 50 is biased in the position direction of the permanent magnet 24.Reference example21 differs from FIG. 21 in that a fulcrum 54 is disposed at a position deviated in a direction opposite to the position of the permanent magnet 24 with respect to the center line X between the magnetic pole pieces 20a and 20b of the iron core 20. .
[0075]
  BookReference exampleAs shown by the solid line in FIG.Reference exampleCompared to 1 (indicated by a broken line), the attraction force characteristic is unbalanced.
[0076]
  The electromagnetic relayReference exampleWhen the contact structure as shown in FIG. 6 is used, the attractive force on the normally open (magnetic pole piece 20b) side is further reduced and the attractive force on the normally closed (magnetic pole piece 20a) side is further increased. An electromagnetic relay provided with a magnetic circuit having an attractive characteristic can be realized. In particular, in the design of a single type (current holding type) electromagnetic relay, asymmetric spring loads can be easily matched.
[0077]
  (Reference example15)
  the aboveReference example12, the fulcrum 54 of the armature 50 is biased toward the magnetic pole (N pole) side of the intermediate portion of the permanent magnet 24.Reference exampleFIG. 23 differs from FIG. 23 in that it is arranged at a position deviated in a direction opposite to the magnetization position of the intermediate portion of the permanent magnet 24 with respect to the center line X between the magnetic poles 20b of the iron core 20.
[0078]
  BookReference exampleIsReference exampleCompared to 12, the suction force on the side of the magnetic pole piece 20a is further increased.Reference exampleIsReference exampleLike 14Reference exampleCompared to 12, the suction force characteristics are further unbalanced.
[0079]
  The electromagnetic relayReference exampleWhen the contact structure as shown in FIG. 6 is used, the attractive force on the normally open (magnetic pole piece 20b) side is further reduced and the attractive force on the normally closed (magnetic pole piece 20a) side is further increased. An electromagnetic relay provided with a magnetic circuit having an attractive characteristic can be realized. In particular, in the design of a single type (current holding type) electromagnetic relay, asymmetric spring loads can be easily matched.
[0080]
  (Reference example16)
  the aboveReference example13, the fulcrum 54 of the armature 50 is biased toward the center position Y side of the permanent magnet 24.Reference example24 is different from the center line X between the magnetic poles 20b of the iron core 20 in that it is arranged at a position deviated in a direction opposite to the center position Y of the permanent magnet 24, as shown in FIG.
[0081]
  BookReference exampleIsReference exampleLike 14Reference exampleCompared to 12, the suction force characteristics are further unbalanced.
[0082]
  The electromagnetic relayReference exampleWhen the contact structure as shown in FIG. 6 is used, the attractive force on the normally open (magnetic pole piece 20b) side is further reduced and the attractive force on the normally closed (magnetic pole piece 20a) side is further increased. An electromagnetic relay provided with a magnetic circuit having an attractive characteristic can be realized. In particular, in the design of a single type (current holding type) electromagnetic relay, asymmetric spring loads can be easily matched.
[0083]
  (Reference example17)
  Reference example11, the fulcrum 54 of the armature 50 is disposed between the position of the permanent magnet 24, which is biased, and the center line X between the magnetic pole pieces 20 a, 20 b on both sides of the iron core 20.Reference example25 (a) and 25 (b), the position of the permanent magnet 24 is biased to a position close to the center line X, and the position of the permanent magnet 24 and the magnetic pole piece 20a of the iron core 20 at a position close to the permanent magnet 24. Is characterized by the fact that the fulcrum 54 of the armature 5 is disposed at a position between the two, and in that the attraction force characteristics can be unbalanced.Reference example11 is the same. The coil 41 can be installed in a large space by biasing the permanent magnet 24. As shown in FIG. 25A, the space between the magnetic pole piece 20b or the magnetic pole piece 20b of the iron core 20 and the arrangement position of the permanent magnet 24 can be ensured. The coil 41 may be attached to the horizontal piece 20c. In any of the examples shown in FIGS. 25A and 25B, an electromagnetic relay can be configured by adopting the contact structure as shown in FIG.
[0084]
  (Reference example18)
  Reference example12, the fulcrum 54 of the armature 50 is disposed between the magnetized position of the intermediate portion deviated from the center and the center line X between the magnetic pole pieces 20 a and 20 b on both sides of the iron core 20.Reference exampleAs shown in FIG. 26 (a), there is a feature in that the magnetized position of the intermediate portion is set as the center through which the center line X passes, and the fulcrum 54 is disposed so as to be positioned between the center line X and the magnetic pole piece 20a. In terms of unbalanced suction force characteristicsReference example12 is the same. In this case, the coil 41 is attached to the horizontal piece 20 c of the iron core 20.
[0085]
  When the magnetized position of the intermediate portion of the permanent magnet 24 is slightly biased toward the fulcrum 54 as shown in FIG. 26B, the coil 41 may be attached to the magnetic pole piece 20a of the iron core 20. In any of the examples shown in FIGS. 26A and 26B, an electromagnetic relay can be configured by adopting the contact structure as shown in FIG.
(Reference example19)
  Reference example13, the center position Y of the permanent magnet 24 attached integrally to the armature 50 is biased toward the magnetic pole piece 20 a side from the center line X passing between the magnetic pole pieces 20 a and 20 b on both sides of the iron core 20. The fulcrum 54 of the armature 50 is biased between the center position Y and the center position Y.Reference exampleThen, as shown in FIGS. 27 (a) and 27 (b), the position of the fulcrum 54 of the armature 50 is biased between the center position Y and the magnetic pole piece 20a, so that the attraction force characteristic is unbalanced. Yes. The coil 41 may be attached to the horizontal piece 20c of the iron core 20 as shown in FIG. 27 (a) or the magnetic pole piece 20a as shown in FIG. 27 (b). In any of the examples shown in FIGS. 27A and 27B, an electromagnetic relay can be configured by adopting a contact structure as shown in FIG.
[0086]
  (Embodiment1)
  In the electromagnet drive device having a structure in which the permanent magnet 24 stands on the horizontal piece 20c of the iron core 20, when the coils having the same characteristics are respectively attached to the magnetic pole pieces 20a and 20b on both sides of the iron core 20, in this embodiment, FIG. As shown in (a), the permanent magnet 24 is set up at the center position of the horizontal piece 20c of the iron core 20, that is, the center line Y, and the fulcrum 54 of the armature 50 is biased between the center line Y and the magnetic pole piece 20a. It is arranged. That is, the suction force characteristic is unbalanced by effectively offsetting the fulcrum 54 from the center while effectively using the arrangement space.
[0087]
  When the position of the permanent magnet 24 is biased in the same manner as in FIG. 25A, the coil 41 attached to the magnetic pole piece 20a is a coil having a small number of turns as shown in FIG. 28B, and is attached to the magnetic pole piece 20b. By making the coil 41 to be made into a coil with a large number of turns and providing the characteristics of the left and right coils 41 and 41 with asymmetry, the attraction force characteristics can be unbalanced.
[0088]
  In any of the examples shown in FIGS. 28A and 28B, an electromagnetic relay can be configured by adopting the contact structure as shown in FIG.
[0089]
  (Embodiment2)
  In this embodiment, in the configuration shown in FIGS. 26 (a) and 26 (b), coils are attached to the magnetic pole pieces 20a and 20b, and the permanent magnet 24 is used with the magnetized position of the intermediate portion as the central position. In the case of a), as shown in FIG. 29A, coils 41 and 41 having the same characteristics are used as the magnetic pole pieces 20a and 20b.
[0090]
  In the case of FIG. 26B using the permanent magnet 24 in which the magnetization position of the intermediate portion is deviated from the center position, the coil 41 attached to the magnetic pole piece 20a has a small number of turns as shown in FIG. By using the coil 41 and the coil 41 attached to the magnetic pole piece 20b as a coil having a large number of turns, the characteristics of the left and right coils 41, 41 are made asymmetric, so that the attraction force characteristics can be unbalanced.
[0091]
  In any of the examples shown in FIGS. 29A and 29B, an electromagnetic relay can be configured by adopting the contact structure as shown in FIG.
[0092]
  (Embodiment3)
  In the electromagnet driving apparatus having a structure in which the permanent magnet 24 is integrally attached to the armature 50, when the coils having the same characteristics are respectively attached to the magnetic pole pieces 20a and 20b on both sides of the iron core 20, in this embodiment, FIG. As shown in (a), the center line X passing between the pole pieces 20b, 20b on both sides of the iron core 20 is made to coincide with the center position Y of the permanent magnet 24, and the fulcrum 54 of the armature 50 is set to the center position Y and the pole piece 20a. It is biased between the two. In other words, the attraction force characteristic is unbalanced by deviating the fulcrum 54 from the center.
[0093]
  When the center of the permanent magnet 24 is also biased toward the magnetic pole piece 20a as shown in FIG. 27, the coil 41 to be mounted on the magnetic pole piece 20a is a coil with a small number of turns as shown in FIG. By making the coil 41 to be attached to the coil having a large number of turns and providing the characteristics of the left and right coils 41 and 41 with asymmetry, the attraction force characteristics can be unbalanced.
[0094]
  In any of the examples shown in FIGS. 30A and 30B, an electromagnetic relay can be configured by adopting the contact structure as shown in FIG.
[0095]
【The invention's effect】
  According to the first aspect of the present invention, in the electromagnet driving device configured as described above, the fulcrum of the permanent magnet and the armature is provided at a position deviated to one side from the center between the magnetic pole pieces on both sides of the iron core. Since the fulcrum of the permanent magnet and armature is provided at a position deviated from the center between the magnetic pole pieces of the magnet, the attraction force during non-excitation is made asymmetrical so that the attraction force between the excitation attraction and non-excitation It is possible to realize an electromagnet drive device with a wider width. Further, since the coils are respectively mounted at the positions of the iron core from the position where the fulcrum of the armature is offset to the position including the pole pieces on both sides, there is an effect that the attractive force on both sides of the fulcrum can be widened..
[0096]
  ContractClaim2The invention according to claim 1 uses a permanent magnet magnetized with different magnetic poles at both ends as the permanent magnet, and has one end on both sides of the iron core so that both end directions are parallel to the magnetic pole pieces of the iron core. Arranged on the horizontal piece of the iron core at a position deviated from the center between the pole pieces, and the fulcrum of the armature is arranged between the arrangement position of the permanent magnet and the magnetic pole piece of the iron core closer to the arrangement position. As a result, there is an effect that it is possible to secure a larger mounting (winding) space for the coil as well as unbalance of the attractive force characteristics.
[0097]
  ContractClaim3The invention according to claim 1 uses the permanent magnet of the invention according to claim 1 that is magnetized with the same polarity at both ends as the permanent magnet, and is magnetized with a different polarity at the middle portion biased from the center in the both end directions. Both ends are arranged so as to be in contact with the inner surface of the tip of the pole piece on both sides of the iron core, and the fulcrum of the armature is positioned near the magnetized position of the intermediate portion of the permanent magnet and the magnetized position. Therefore, there is an effect that the attraction force characteristic can be unbalanced without worrying about the space for mounting (winding) the coil.
[0098]
  ContractClaim4In the invention of claim 1, since the permanent magnet is integrally attached so as to be parallel to the armature, since the permanent magnet is not disposed on the iron core side, the space that can be occupied by the coil attached to the iron core is increased. As a result, the number of turns of the coil can be increased.
[0099]
  ContractClaim5The invention of claim4In this invention, the permanent magnet is attached to the armature so that the center position of the permanent magnet is deviated from a line passing through the center between the pole pieces on both sides of the iron core. Is located at a position corresponding to the position between the center position of the permanent magnet and the magnetic pole piece of the iron core closer to the center position, so that the attractive force characteristics can be obtained without worrying about the coil mounting (winding) space. There is an effect that unbalance can be achieved.
[0100]
  ContractClaim6According to the present invention, in the electromagnetic relay configured as described above, the fulcrum of the permanent magnet and the armature is located at a position deviated in the direction opposite to the end direction of the contact spring from the center between the pole pieces on both sides of the iron core. As a result, it is possible to realize an electromagnetic relay that can achieve asymmetry of the attractive force and can be easily matched with an asymmetric spring load having a contact spring on one side.. In addition, since the coils are attached to the positions of the iron core from the position where the fulcrum of the armature is offset to the position including the magnetic pole pieces on both sides, the suction force width on both sides can be secured, so that the suction is easier to align. Has the effect of securing the power.
[0101]
  ContractClaim7The invention of claim6In this invention, since the permanent magnet is integrally attached so as to be parallel to the armature, the permanent magnet is not disposed on the iron core side, so that the space that can be occupied by the coil mounted on the iron core can be increased, and as a result the coil There is an effect that the number of turns can be increased.
[0102]
  ContractClaim8The invention of claim6 or 7In the invention, since the hinge spring having one end fixed to the armature and the other end fixed on the body from a direction opposite to the other end direction of the contact spring is provided, the hinge spring is utilized using a dead space. The arrangement space is secured, the space is effectively used, and a small electromagnetic relay can be manufactured.
[0103]
  Claim9The invention of claim8In the invention, the hinge spring is substantially U-shaped, and at least the plate surfaces of both side pieces are set in the same direction as the plate surface of the contact spring, the tip of one side piece is fixed to the armature, and the other side piece is Since the distal end of the side piece is disposed side by side on the armature and is fixed on the body, the center piece can be biased and spring adjustment can be performed.
[0104]
  Claim10The invention of claim9In the present invention, since the central piece of the hinge spring is bent and formed so that the plate surface is perpendicular to the plate surfaces of both side pieces, the spring adjustment is performed by pinching the central piece with an adjusting tool from above and biasing it. Therefore, there is an effect that adjustment work becomes easy.
[0105]
  Claim11The invention ofClaims 8 to 10In this invention, since the position where the hinge spring is held on the body is in the vicinity of the fulcrum position of the armature, sliding of the fulcrum part can be reduced, and stable operation can be obtained.
[Brief description of the drawings]
FIG. 1 (a) shows the present invention.Reference exampleIt is a schematic block diagram of the 1 electromagnet drive device.
  (B) is explanatory drawing of the attraction force characteristic same as the above.
FIG. 2 is a diagram illustrating the principle of the above.
FIG. 3 is an explanatory diagram of attraction force characteristics used in the principle description.
FIG. 4 of the present inventionReference exampleIt is a schematic block diagram which can omit a part of 2 electromagnet drive device.
FIG. 5 of the present inventionReference exampleFIG. 3 is a schematic configuration diagram in which a part of the electromagnet drive device 3 can be omitted.
FIG. 6 of the present inventionReference exampleIt is a schematic block diagram of 4 electromagnetic relays.
FIG. 7 is an exploded perspective view of the above.
FIG. 8 (a) is a plan sectional view in which the same is partially broken.
  (B) is side surface sectional drawing same as the above.
  (C) is side sectional drawing of another position same as the above.
  (D) is an electric circuit diagram of the same as above.
FIG. 9 is an exploded perspective view of the coil block.
FIG. 10 shows the present invention.Reference example5 is an exploded perspective view of FIG.
FIG. 11 shows the present invention.Reference exampleIt is a schematic block diagram of 6 electromagnetic relays.
FIG. 12 shows the present invention.Reference exampleIt is a schematic block diagram of 7 electromagnetic relays.
FIG. 13 shows the present invention.Reference exampleIt is a schematic block diagram which can abbreviate | omit a part of 8 electromagnet drive device.
FIG. 14 is an explanatory diagram of the suction force characteristics of the above.
FIG. 15 shows the present invention.Reference exampleIt is a schematic block diagram which can abbreviate | omit a part of 9 electromagnet drive device.
FIG. 16 shows the present invention.Reference exampleIt is a schematic block diagram which can abbreviate | omit a part of ten electromagnet drive devices.
FIG. 17 shows the present invention.Reference exampleIt is a schematic block diagram which can abbreviate | omit a part of 11 electromagnet drive devices.
FIG. 18 is an explanatory diagram of the suction force characteristics of the above.
FIG. 19 shows the present invention.Reference Example 12It is a schematic block diagram which can abbreviate | omit a part of electromagnet drive device.
FIG. 20 shows the present invention.Reference Example 13It is a schematic block diagram which can abbreviate | omit a part of electromagnet drive device.
FIG. 21 shows the present invention.Reference Example 14It is a schematic block diagram which can abbreviate | omit a part of electromagnet drive device.
FIG. 22 is an explanatory diagram of the suction force characteristics of the above.
FIG. 23 shows the present invention.Reference Example 15It is a schematic block diagram which can abbreviate | omit a part of electromagnet drive device.
FIG. 24 shows the present invention.Reference Example 16It is a schematic block diagram which can abbreviate | omit a part of electromagnet drive device.
FIG. 25 (a) shows the present invention.Reference Example 17It is a schematic block diagram which can abbreviate | omit a part of an example of an electromagnet drive device.
  (B) is a schematic block diagram which can abbreviate | omit a part of other examples same as the above.
FIG. 26 (a) shows the present invention.Reference Example 18It is a schematic block diagram which can abbreviate | omit a part of an example of an electromagnet drive device.
  (B) is a schematic block diagram which a part of modification of the above can be omitted.
FIG. 27 (a) illustrates the present invention.Reference Example 19It is a schematic block diagram which can abbreviate | omit a part of an example of an electromagnet drive device.
  (B) is a schematic block diagram which can abbreviate | omit a part of other examples same as the above.
FIG. 28A is an embodiment of the present invention.1It is a schematic block diagram which can abbreviate | omit a part of an example of an electromagnet drive device.
  (B) is a schematic block diagram which a part of modification of the above can be omitted.
FIG. 29A is an embodiment of the present invention.2It is a schematic block diagram which can abbreviate | omit a part of an example of an electromagnet drive device.
  (B) is a schematic block diagram which a part of modification of the above can be omitted.
FIG. 30A is an embodiment of the present invention.3It is a schematic block diagram which can abbreviate | omit a part of an example of an electromagnet drive device.
  (B) is a schematic block diagram which can abbreviate | omit a part of other examples same as the above.
FIG. 31 (a) is a schematic configuration diagram of a conventional bistable electromagnetic relay.
  (B) is an explanatory view of the suction force characteristic and the spring load characteristic same as the above.
FIG. 32A is a schematic configuration diagram of a 2a type electromagnetic relay using a conventional electromagnet driving device.
  (B) is an explanatory view of the suction force characteristic and the spring load characteristic same as the above.
FIG. 33 (a) is a schematic configuration diagram of an electromagnetic relay obtained by improving the electromagnetic relay of FIG.
  (B) is an explanatory view of the suction force characteristic and the spring load characteristic same as the above.
[Explanation of symbols]
  20 Iron core
  20a, 20b pole piece
  20c center piece
  24 Permanent magnet
  41 coils
  50 Armature
  54 Protrusions

Claims (11)

A substantially U-shaped iron core with parallel magnetic pole pieces on both sides, two coils mounted on the iron core, and a seesaw that can move around a fulcrum provided between both ends, with both ends at the tip of leg pieces on both sides of the iron core An armature that is opposed to the magnetic pole surface of the magnet, and one end of the armature and an iron core through the tip magnetic pole surface of the iron core pole piece corresponding to the one end constitute a closed magnetic circuit and correspond to one end of the armature In the electromagnet drive device, which has a permanent magnet attracted to the tip magnetic pole surface of the leg piece of the iron core, and allows the armature to be reversed by flowing an exciting current in the direction of erasing the magnetic force of the permanent magnet in the coil, both sides of the iron core The fulcrum of the permanent magnet and the armature is provided at a position deviated to one side from the center between the magnetic pole pieces, and the iron core from the position where the fulcrum of the armature is displaced to the position including the pole pieces on both sides. Attached to each position and each coil Electromagnetic driving device being characterized in that the different number of turns from each other. A permanent magnet magnetized with different magnetic poles at both ends is used as the permanent magnet, and the one end is displaced from the center between the magnetic pole pieces on both sides of the iron core so that both end directions are parallel to the magnetic pole pieces of the iron core. 2. The armature according to claim 1 , wherein the armature is disposed on a lateral piece of the iron core, and the fulcrum of the armature is disposed between the position of the permanent magnet and the magnetic pole piece of the iron core close to the position of the permanent magnet . Electromagnet drive device. As the permanent magnet, both ends of the permanent magnet are magnetized to the same polarity, and the permanent magnet is magnetized to have a different polarity in the middle portion that is biased from the center of the both ends. The bridge is arranged so as to be in contact with the inner surface of the part, and the fulcrum of the armature is arranged between the magnetized position of the intermediate part of the permanent magnet and the pole piece of the iron core on the side close to the magnetized position. electromagnet driving apparatus according to claim 1, characterized in that the. 2. The electromagnet drive device according to claim 1, wherein the permanent magnet is integrally attached so as to be parallel to the armature . The permanent magnet is attached to the armature so that the center position of the permanent magnet deviates from a line passing through the center between the pole pieces on both sides of the iron core, and the fulcrum of the armature is attached to the center of the permanent magnet. 5. The electromagnet driving device according to claim 4 , wherein the electromagnet driving device is disposed at a position corresponding to a position between the magnetic pole piece of the iron core closer to the center position . A substantially U-shaped iron core with magnetic pole pieces parallel to both sides, two coils mounted on this iron core, and a seesaw that can move around a fulcrum provided between both ends, with both ends at the tip of the leg piece on both sides of the iron core. An armature opposed to the magnetic pole surface, and one end of the armature and an iron core corresponding to one end of the armature by forming a closed magnetic path with the iron core via the tip magnetic pole surface of the iron core pole piece corresponding to the one end An electromagnet block is composed of a permanent magnet attracted to the tip magnetic pole surface of the leg piece, and the electromagnet block is disposed on the body. The armature is disposed so as to be parallel to the armature, and has one end at the armature. The movable contact provided at the other end extending in the direction of the end of the armature is opposed to the fixed contact disposed on the body, and the movable contact is moved according to the seesaw operation of the armature. A contact spring for releasing the contact with the fixed contact. In an electromagnetic relay that allows the armature to be reversed by passing an exciting current in a direction that cancels the magnetic force of the permanent magnet, it is opposite to the end direction of the contact spring from the center between the pole pieces on both sides of the iron core. The fulcrum of the permanent magnet and the armature is provided at a position biased in the direction, and the coil is mounted at the position of the iron core from the position where the fulcrum of the armature is biased to the side including the pole pieces on both sides. An electromagnetic relay characterized in that each coil has a different number of turns . The electromagnetic relay according to claim 6, wherein the permanent magnet is integrally attached so as to be parallel to the armature . 8. An electromagnetic relay according to claim 6, further comprising a hinge spring having one end fixed to the armature and the other end fixed on the body from a direction opposite to the other end direction of the contact spring. . The hinge spring is substantially U-shaped, and at least the plate surfaces of both side pieces are in the same direction as the plate surface of the contact spring, one side piece tip is fixed to the armature, and the other side piece is attached to the armature. The electromagnetic relay according to claim 8 , wherein the electromagnetic relay is arranged side by side and the tip of the side piece is fixed on the body . 10. The electromagnetic relay according to claim 9 , wherein the central piece of the hinge spring is bent so that the plate surfaces are perpendicular to the plate surfaces of both side pieces . 11. The electromagnetic relay according to claim 8, wherein a position where the hinge spring is fixed on the body is in the vicinity of a fulcrum position of the armature .

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