WO2021176669A1 - 電磁リレー - Google Patents

電磁リレー Download PDF

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Publication number
WO2021176669A1
WO2021176669A1 PCT/JP2020/009525 JP2020009525W WO2021176669A1 WO 2021176669 A1 WO2021176669 A1 WO 2021176669A1 JP 2020009525 W JP2020009525 W JP 2020009525W WO 2021176669 A1 WO2021176669 A1 WO 2021176669A1
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WO
WIPO (PCT)
Prior art keywords
magnetic path
iron core
path constituent
constituent member
movable iron
Prior art date
Application number
PCT/JP2020/009525
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
涼 上前
孝幸 甲斐
崇実 二木
小林　哲也
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2020/009525 priority Critical patent/WO2021176669A1/ja
Priority to JP2021569225A priority patent/JP7026872B2/ja
Publication of WO2021176669A1 publication Critical patent/WO2021176669A1/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/40—Branched or multiple-limb main magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/42—Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement

Definitions

  • the present disclosure relates to an electromagnetic relay that opens and closes between a fixed contact and a movable contact by energizing a coil.
  • Patent Document 1 discloses an electromagnetic relay that opens and closes a contact device by using a magnetic attraction generated by energizing a coil.
  • the electromagnetic relay described in Patent Document 1 includes a contact device, an electromagnet device, and a power supply device.
  • the contact device includes a pair of fixed contacts, a movable contact provided corresponding to the pair of fixed contacts and arranged below the fixed contacts, and a movable contact that supports the movable contacts.
  • the electromagnet device has a tubular splice that is located below the contact device.
  • the electromagnet device is arranged between the first fixed iron core arranged above the inside of the tubular joint iron, the second fixed iron core arranged below, and the first fixed iron core and the second fixed iron core.
  • It has a movable iron core, which is a plunger.
  • a shaft fixed to the movable core is provided so as to penetrate the inside of the first fixed core, the movable core, and the second fixed core in the vertical direction. The upper end of the shaft is connected to a movable contact.
  • the first coil is arranged so as to surround the first fixed iron core, and the second coil is arranged so as to surround the second fixed iron core.
  • a middle plate connected to a tubular joint iron is provided between the first coil and the second coil, and the middle plate is provided with a bush and a permanent magnet that come into contact with the periphery of the movable iron core.
  • the power supply is connected to the first coil.
  • the present disclosure has been made in view of the above, and an object of the present disclosure is to obtain an electromagnetic relay capable of suppressing a decrease in electromagnetic propulsive force acting on a movable iron core as compared with the conventional case.
  • the electromagnetic relay includes a first coil, a second coil, a movable iron core, a fixed iron core, a relay, a permanent magnet, and a first magnetic path. It includes a component member and a second magnetic path component member.
  • the first coil and the second coil are arranged side by side in the first direction so that the stretching direction is the first direction.
  • the movable iron core passes through the centers of the first coil and the second coil, respectively, and can move in the first direction.
  • the fixed iron core has a first member and a second member that define a moving range of the movable iron core in the first direction, and a third member that connects between the first member and the second member, and is made of a magnetic material.
  • the joint iron is arranged in the region between the first coil and the second coil on the third member of the fixed iron core so as to project toward the movable iron core.
  • the permanent magnet is arranged between the third member and the joint iron.
  • the first magnetic path constituent member is made of a magnetic material provided in contact with the joint iron in the region between the first coil and the movable iron core.
  • the second magnetic path constituent member is made of a magnetic material provided in contact with the joint iron in the region between the second coil and the movable iron core.
  • the sum of the lengths of the joint iron, the first magnetic path constituent member, and the second magnetic path constituent member in the first direction is longer than the length of the movable iron core in the first direction, and the first member and the second member of the fixed iron core Shorter than the distance between.
  • a gap is provided between the first magnetic path constituent member and the first member, and between the second magnetic path constituent member and the second member.
  • the electromagnetic relay according to the present disclosure has the effect of being able to suppress a decrease in the electromagnetic propulsive force acting on the movable iron core as compared with the conventional case.
  • Sectional drawing which shows an example of the structure of the electromagnetic relay by Embodiment 1.
  • the figure which shows an example of the change with time of the current flowing through a coil The figure which shows typically the state of the magnetic flux in the operating state of the electromagnetic relay by Embodiment 1.
  • the perspective view which shows an example of the structure of the magnetic path component used for the electromagnetic relay by Embodiment 2.
  • Perspective view showing an example of the structure of the magnetic path component used for the electromagnetic relay according to the third embodiment.
  • FIG. 1 Perspective view showing an example of the structure of the magnetic path constituent member used for the electromagnetic relay according to Embodiment 4.
  • the perspective view which shows an example of the structure of the magnetic path component used for the electromagnetic relay by Embodiment 5.
  • Sectional drawing which shows an example of the structure of the electromagnetic relay by Embodiment 6.
  • Perspective view showing an example of the configuration of the sliding member used for the electromagnetic relay according to the sixth embodiment.
  • the perspective view which shows an example of the structure of the magnetic path component used for the electromagnetic relay by Embodiment 7.
  • FIG. 1 is a cross-sectional view showing an example of the configuration of the electromagnetic relay according to the first embodiment.
  • the moving direction of the movable iron core 11 is the Z axis, one of the two axes in the plane perpendicular to the Z axis and orthogonal to each other is the X axis, and the other. Let the axis be the Y axis.
  • the positive side direction of the Z axis is also referred to as an upward direction
  • the negative side direction of the Z axis is also referred to as a downward direction.
  • the moving direction of the movable iron core 11 corresponds to the first direction.
  • the electromagnetic relay 10 includes a movable iron core 11, an open pole side coil 12, a closing side coil 13, a fixed iron core 14, a permanent magnet 15, a relay iron 16, and magnetic path constituent members 17a and 17b.
  • the movable iron core 11 is a cylindrical iron core extending in the Z-axis direction.
  • the movable iron core 11 is movable in the Z-axis direction.
  • the movable iron core 11 is also referred to as a plunger.
  • the range between the position of the upper end of the movable iron core 11 when the movable iron core 11 is moved to the uppermost position and the position of the lower end of the movable iron core 11 when the movable iron core 11 is moved to the lowermost side is the range of the movable iron core 11. It is called the movable range R.
  • the position of the upper end of the movable iron core 11 when the movable iron core 11 is moved to the uppermost side is also referred to as an open pole position, and the position of the lower end of the movable iron core 11 when the movable iron core 11 is moved to the lowermost side is inserted. Also called position.
  • the open pole side coil 12 is arranged above the movable range R of the movable iron core 11 so as to surround the circumference of the movable iron core 11.
  • the charging side coil 13 is arranged below the movable range R of the movable iron core 11 so as to surround the circumference of the movable iron core 11.
  • the open electrode side coil 12 and the inlet side coil 13 are arranged so that their positions in the XY plane overlap each other so that the extension direction is the Z direction, that is, they are arranged side by side in the Z direction.
  • the open electrode side coil 12 corresponds to the first coil
  • the inlet side coil 13 corresponds to the second coil.
  • the fixed iron core 14 has a shape that defines the movable range R of the movable iron core 11, and has a U-shaped ZX cross section. That is, the fixed iron core 14 includes a first member 141 that defines the upper side of the movable range R of the movable iron core 11, a second member 142 that defines the lower side of the movable range R of the movable iron core 11, the first member 141, and the first member 141. Includes a third member 143 that connects the two members 142. In the example of FIG. 1, the first member 141 and the second member 142 are parallel to the XY plane, and the third member 143 is parallel to the YZ plane.
  • the fixed iron core 14 is made of a magnetic material and is also referred to as a yoke.
  • the permanent magnet 15 is joined to the side surface of the third member 143 of the fixed iron core 14 on the side where the movable iron core 11 is arranged.
  • the joint iron 16 is a plate-shaped member joined to the permanent magnet 15 so as to be sandwiched between the permanent magnet 15 and the movable iron core 11 in the region between the open pole side coil 12 and the input side coil 13. .. That is, the joint iron 16 is arranged on the side surface of the third member 143 of the fixed iron core 14 so as to project toward the movable iron core 11.
  • the joint iron 16 is also referred to as a plate.
  • the permanent magnet 15 is arranged so that the magnetic poles are different between the surface in contact with the third member 143 and the surface in contact with the joint iron 16.
  • the surface side in contact with the third member 143 may be the S pole
  • the surface side in contact with the joint iron 16 may be the N pole.
  • the open pole side coil 12 is arranged so that a part of the open pole side coil 12 passes through the space surrounded by the joint iron 16 and the first member 141 and the third member 143 of the fixed iron core 14. Further, the charging side coil 13 is arranged so that a part of the charging side coil 13 passes through the space surrounded by the joint iron 16 and the second member 142 and the third member 143 of the fixed iron core 14.
  • the magnetic path component 17a is arranged between the joint iron 16 and the first member 141 of the fixed iron core 14 so as to come into contact with the joint iron 16.
  • the magnetic path constituent member 17b is arranged between the joint iron 16 and the second member 142 of the fixed iron core 14 so as to come into contact with the joint iron 16.
  • the magnetic path constituent members 17a and 17b are made of a cylindrical magnetic material.
  • the magnetic path constituent member 17a is arranged between the inner peripheral surface of the open electrode side coil 12 and the outer peripheral surface of the movable iron core 11, and the magnetic path constituent member 17b is formed between the inner peripheral surface of the input side coil 13 and the movable iron core 11. It is arranged between the outer peripheral surface and the outer peripheral surface.
  • the magnetic path constituting member 17a is disposed so as predetermined gap g p is provided between the first member 141, the magnetic path constituting member 17b is defined in advance between the second member 142 It is arranged so that a gap g p is provided.
  • a gap g p may be provided so that the magnetic path constituent members 17a and 17b do not come into contact with the first member 141 and the second member 142.
  • the magnetic path constituting member 17a, 17b, the gap g p may be provided between a portion of the first member 141 and second member 142.
  • the magnetic path component 17a corresponds to the first magnetic path component
  • the magnetic path component 17b corresponds to the second magnetic path component.
  • the lengths of the magnetic path constituent members 17a and 17b in the Z-axis direction satisfy the conditions shown below.
  • the sum L2 of the lengths of the two magnetic path constituent members 17a and 17b in the Z-axis direction and the lengths of the joint iron 16 is longer than the length L1 of the movable iron core 11 in the Z-axis direction.
  • the sum L2 of the lengths of the two magnetic path constituent members 17a and 17b and the lengths of the joint iron 16 in the Z-axis direction is the position where the movable iron core 11 contacts the fixed iron core 14 at the open pole position and the insertion position. It is shorter than the contact surface distance L3, which is the distance between the movable iron core 11 and the position where the movable iron core 11 contacts the fixed iron core 14.
  • the contact surface spacing L3 is the same as the length of the movable range R of the movable iron core 11.
  • the movable core 11 can be freely displaced until it collides with the fixed core 14 in the Z-axis direction. That is, the movable iron core 11 is displaced between the open pole position and the closing position.
  • the first member 141 and the third member 143 of the fixed iron core 14 the permanent magnet 15, the joint iron 16, the magnetic path constituent member 17a, or the movable iron core 11
  • the closed path composed of is a magnetic path.
  • the second member 142 and the third member 143 of the fixed iron core 14 the permanent magnet 15, the joint iron 16, the magnetic path constituent member 17b, or the movable iron core 11
  • the closed path composed of becomes a magnetic path.
  • the electromagnetic relay 10 Due to the closed magnetic path, a magnetic attraction force that attracts the movable core 11 to the fixed core 14 acts on the movable core 11, so that the movable core 11 is attracted and held at the open pole position or the insertion position. That is, when the movable iron core 11 is present at the open pole position or the closing position, the movable iron core 11 can be stably stopped at the open pole position or the closing position by passing the magnetic flux generated by the permanent magnet 15 through the magnetic path. .. Further, the electromagnetic relay 10 has a bistable configuration in which the movable iron core 11 can be stationary at the open pole position or the close-in position even after the supply of the current to the open pole side coil 12 and the close-in side coil 13 is cut off. ..
  • the open electrode side coil 12 and the close-in side coil 13 are connected to an external power source (not shown). Further, the open electrode side coil 12 and the inlet side coil 13 are connected in series.
  • the open electrode side coil 12 and the inlet side coil 13 are excited when the movable iron core 11 is in the open pole position, the magnetic attraction force is canceled and the propulsive force in the direction toward the input side coil 13 acts on the movable iron core 11. Then, the movable iron core 11 reaches the loading position and is held.
  • the direction toward the charging side coil 13 is also referred to as a charging direction.
  • the closing side coil 13 and the opening electrode side coil 12 are excited when the movable iron core 11 is in the closing position, the magnetic attraction force is canceled and the movable iron core 11 has a propulsive force in the direction toward the opening pole side coil 12. Acts, and the movable iron core 11 reaches the open pole position and is held.
  • the direction toward the coil 12 on the open pole side is also referred to as the open pole direction.
  • the movable iron core 11 reciprocates between the opening pole position and the closing position.
  • FIG. 2 is a diagram schematically showing a state of magnetic flux in an operating state of an electromagnetic relay according to a comparative example.
  • the electromagnetic relay 20 according to the comparative example has a structure in which magnetic path constituent members 17a and 17b are not provided between the movable iron core 11, the open electrode side coil 12, and the inlet side coil 13.
  • the movable iron core 11 is moved to the closing position by exciting the opening side coil 12 and the closing side coil 13 while the movable iron core 11 is present at the closing position.
  • the magnetic resistance of the magnetic circuit including the fixed iron core 14, the movable iron core 11, the permanent magnet 15 and the joint iron 16 changes due to the movement of the movable iron core 11, the magnetic flux passing through the magnetic circuit changes accordingly.
  • the magnetic flux seen from the open electrode side coil 12 is reduced by opening the gap between the first member 141 of the fixed iron core 14 and the movable iron core 11.
  • the magnetic flux seen from the input side coil 13 has increased due to the narrowing of the gap between the second member 142 of the fixed iron core 14 and the movable iron core 11.
  • FIG. 3 is a diagram showing an example of a change in the current flowing through the coil with time.
  • the horizontal axis represents time
  • the vertical axis represents the coil current, which is the current flowing through the opening side coil 12 or the closing side coil 13.
  • the open electrode side coil 12 and the input side coil 13 generate a counter electromotive force in a direction that restores the amount of magnetic flux seen from the coil. Therefore, a voltage having a polarity opposite to that of the coil exciting power supply (not shown) is generated, and as shown by the curve I2 in the figure, it acts to reduce the exciting current. Therefore, the electromagnetic force for driving the movable iron core 11 is reduced, and the operation of the electromagnetic relay 10 is hindered.
  • FIG. 4 to 6 are diagrams schematically showing the state of magnetic flux in the operating state of the electromagnetic relay according to the first embodiment.
  • FIG. 4 shows how the movable iron core 11 is attracted and held at the open pole position by the magnetic flux generated by the permanent magnet 15.
  • the magnetic flux caused by the permanent magnet 15 is equal to the magnetic flux ⁇ c seen from the open pole side coil 12, and is the sum of the magnetic flux ⁇ p passing through the magnetic path constituent member 17a and the magnetic flux ⁇ a passing through the movable iron core 11. It is expressed by.
  • the open pole side coil 12 and the closing side coil 13 are excited in this state, the movable iron core 11 moves from the same opening pole position to the closing position as described above.
  • FIG. 5 shows a state in which the movable iron core 11 is moving from the state of FIG. 4 to the insertion position.
  • the movable iron core 11 is contained inside the joint body of the two magnetic path constituent members 17a and 17b and the joint iron 16. That is, consider a case where the upper portion of the movable iron core 11 is below the upper end of the magnetic path constituent member 17a and the lower portion of the movable iron core 11 is above the lower end of the magnetic path constituent member 17b.
  • the magnetic flux ⁇ c seen from the open electrode side coil 12 is divided into the magnetic flux ⁇ p passing through the magnetic path constituent member 17a and the magnetic flux ⁇ a passing through the movable iron core 11 as described above.
  • the gap g p of the upper end of the magnetic path constituting member 17a and the first member 141 of the fixed iron core 14 that is fixed gap the gap g a of the first member 141 of the movable iron core 11 and the fixed iron core 14 is variable gap Is.
  • the magnetic flux ⁇ a passing through the movable iron core 11 is the magnetic path constituent member 17a, It becomes extremely small with respect to the magnetic flux ⁇ p passing through 17b. That is, the magnetic flux ⁇ c seen from the open pole side coil 12 is dominated by the magnetic flux ⁇ p passing through the magnetic path constituent member 17a.
  • the period is longer little change magnetic flux [Phi c as viewed from the opening side coil 12 movable iron core 11 has two magnetic path constituting member 17a, which fits inside the joined body of the 17b and the yoke 16, the movable
  • the counter electromotive force generated in the open electrode side coil 12 due to the movement of the iron core 11 is minimized, and the reduction of the electromagnetic force for driving the movable iron core 11 can be suppressed. That is, as shown in the curve I1 of FIG. 3, the decrease in the exciting current can be suppressed. Therefore, since the electromagnetic force for driving the movable iron core 11 does not decrease as compared with the comparative example, the factor that hinders the operation of the electromagnetic relay 10 can be eliminated.
  • the movable iron core 11 moves to the insertion position while the electromagnetic force for driving the movable iron core 11 is maintained.
  • the electromagnetic relay 10 further has two fixed contacts and movable contacts corresponding to the two fixed contacts.
  • the wiring on the power supply side and the wiring on the load side are connected to each of the fixed contacts.
  • the movable contact is provided on a movable contact made of a conductor. The movable contact moves to the fixed contact side, and when the fixed contact and the movable contact come into contact with each other, the wiring on the power supply side and the wiring on the load side become conductive. Further, when the movable contact is separated from the fixed contact, the wiring on the power supply side and the wiring on the load side are not electrically connected.
  • the movable contactor and the movable iron core 11 with a shaft, the contact or non-contact state between the fixed contact and the movable contact can be switched.
  • the bistable electromagnetic relay 10 configured to hold the open / closed state of the movable iron core 11 by the magnetic flux generated by the permanent magnet 15, the movable range R of the movable iron core 11 moving in the Z-axis direction
  • short magnetic path constituent members 17a and 17b are provided so as to surround the movable iron core 11.
  • the contact surface spacing of the fixed iron cores 14 is such that the sum L2 of the lengths of the magnetic path constituent members 17a and 17b and the joint iron 16 in the Z-axis direction is longer than the length L1 of the movable iron core 11 in the Z-axis direction. It was shorter than L3.
  • a gap g p is provided between the magnetic path constituent member 17a and the first member 141 of the fixed iron core 14 and between the magnetic path constituent member 17b and the second member 142 of the fixed iron core 14.
  • the magnetic flux caused by the permanent magnet 15 passes through the permanent magnet 15, the joint iron 16, the magnetic path component 17a or the magnetic path component 17b, and the fixed iron core 14 in this order to form a closed path, but the magnetic flux is large.
  • the portion does not pass through the movable iron core 11 in which the gap with the fixed iron core 14 becomes large. That is, since the movable iron core 11 is not included in the magnetic path, the magnetic flux seen from the opening side coil 12 and the closing side coil 13 becomes substantially constant. Therefore, during the above period, the counter electromotive force is less likely to be generated in the open electrode side coil 12 and the input side coil 13, and the decrease in the magnetic propulsive force for driving the movable iron core 11 can be alleviated. As a result, there is an effect that the decrease in the electromagnetic propulsive force acting on the movable iron core 11 can be suppressed as compared with the conventional case.
  • FIG. 7 is a perspective view showing an example of the configuration of the magnetic path constituent member used in the electromagnetic relay according to the second embodiment. Since the overall configuration of the electromagnetic relay 10 is the same as that of the first embodiment, the description thereof will be omitted, and different parts will be described.
  • the magnetic path constituent members 17a and 17b are formed of a cylindrical magnetic material having one or more slits 171 on the side surface. In one example, the slit 171 extends in a direction parallel to the Z-axis direction.
  • the slits 171 in the magnetic path constituent members 17a and 17b in this way, it is possible to reduce the eddy current caused by the transiently changing magnetic flux passing through the magnetic path constituent members 17a and 17b. Since the eddy current can be reduced, the magnetomotive force in the reverse direction caused by the eddy current is suppressed, and the magnetic resistance can be reduced. That is, the change in the magnetic flux passing through the magnetic path is suppressed, and the counter electromotive force is less likely to be generated in the opening side coil 12 and the closing side coil 13.
  • slits 171 are provided on the side surfaces of the magnetic path constituent members 17a and 17b parallel to the Z axis. As a result, the eddy currents excited by the magnetic path constituent members 17a and 17b are suppressed, and the effective reluctance is reduced. As a result, as compared with the case of the first embodiment, there is an effect that a decrease in the electromagnetic propulsive force acting on the movable iron core 11 can be further suppressed.
  • FIG. 8 is a perspective view showing an example of the configuration of the magnetic path constituent member used in the electromagnetic relay according to the third embodiment. Since the overall configuration of the electromagnetic relay 10 is the same as that of the first embodiment, the description thereof will be omitted, and different parts will be described.
  • the magnetic path constituent members 17a and 17b are formed of a cylindrical magnetic material having one or more protrusions 172 at the end facing the fixed iron core 14. Then, in the third embodiment, the magnetic path constituent members 17a and 17b are arranged so that the protrusion 172 is in contact with the fixed iron core 14.
  • the gap g p between the end of the magnetic path constituent members 17a and 17b facing the fixed iron core 14 other than the protrusion 172 and the fixed iron core 14 can be kept constant.
  • the projections 172 in order to keep the gap g p between the fixed iron core 14 and stably fixed, it is desirable to plurality.
  • the protrusions 172 may be provided on the magnetic path constituent members 17a and 17b having the slits 171 described in the second embodiment.
  • the protrusions 172 are provided at the ends of the magnetic path constituent members 17a and 17b on the fixed iron core 14 side.
  • the magnetic path constituting member 17a, a gap g p between 17b and the fixed iron core 14 is kept constant, so that the magnetic resistance in the magnetic circuit is kept constant.
  • the variation in the magnetic attraction force or the magnetic propulsion force generated in the movable iron core 11 due to the displacement of the magnetic path constituent members 17a and 17b in the Z-axis direction is reduced, and the variation in the operation of the movable iron core 11 can be reduced. It has the effect of being able to do it.
  • FIG. 9 is a perspective view showing an example of the configuration of the magnetic path constituent member used in the electromagnetic relay according to the fourth embodiment. Since the overall configuration of the electromagnetic relay 10 is the same as that of the first embodiment, the description thereof will be omitted, and different parts will be described.
  • the magnetic path constituent members 17a and 17b are formed of a cylindrical magnetic material having a notch 173 at the end on the side in contact with the joint iron 16.
  • the notch 173 is fitted into a positioning protrusion provided on a resin housing (not shown). That is, the notch 173 is provided corresponding to the position of the positioning protrusion of the resin housing.
  • the resin housing is provided on the joint iron 16 side.
  • At least one notch 173 and a positioning protrusion are provided.
  • the magnetic path constituent members 17a and 17b are prevented from being displaced in the rotational direction.
  • a notch 173 may be provided in 17b.
  • a notch 173 corresponding to the position of the protrusion provided on the joint iron 16 side is provided at the end of the magnetic path constituent members 17a and 17b on the joint iron 16 side.
  • FIG. 10 is a perspective view showing an example of the configuration of the magnetic path constituent member used in the electromagnetic relay according to the fifth embodiment. Since the overall configuration of the electromagnetic relay 10 is the same as that of the first embodiment, the description thereof will be omitted, and different parts will be described.
  • the magnetic path constituent members 17a and 17b have an arcuate cross section perpendicular to the Z axis, that is, a cross section perpendicular to the moving direction of the movable iron core 11, and are composed of a magnetic material extending along the Z axis.
  • NS that is, the fifth embodiment has a configuration in which a part of the cylindrical magnetic material is cut out in a direction parallel to the Z axis.
  • the magnetic path constituent members 17a and 17b are provided so as to be in contact with the joint iron 16. As a result, the magnetic path constituent members 17a and 17b do not surround the entire circumference of the movable iron core 11, but partially surround the movable iron core 11.
  • the magnetic path constituent members 17a and 17b of the fifth embodiment may be provided with the slit 171 described in the second embodiment, or the protrusion 172 described in the third embodiment may be provided.
  • the notch 173 described in the fourth embodiment may be provided.
  • the magnetic path constituent members 17a and 17b are formed of a magnetic material having an arcuate cross section perpendicular to the Z axis and extending along the Z axis.
  • the magnetic path constituent members 17a and 17b are composed of a magnetic material having a smaller volume than the cylindrical magnetic material of the first embodiment, so that the manufacturing cost of the electromagnetic relay 10 can be reduced. Has an effect.
  • FIG. 11 is a cross-sectional view showing an example of the configuration of the electromagnetic relay according to the sixth embodiment.
  • the same components as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and different parts will be described.
  • the electromagnetic relay 10 of the sixth embodiment further includes a sliding member 18 on the movable iron core 11 side of the magnetic path constituent members 17a and 17b.
  • the sliding member 18 suppresses that the outer surface of the movable iron core 11 interferes with the inner surfaces of the magnetic path constituent members 17a and 17b during the operation of the movable iron core 11 and the operation becomes unstable due to frictional force, and the movable iron core 18 is prevented from becoming unstable.
  • the sliding member 18 may be any material that can reduce the friction between the movable iron core 11 and the magnetic path constituent members 17a and 17b, and in one example, the sliding member 18 is made of a sliding resin.
  • the slidable resin are polyacetal, polyamide, polytetrafluoroethylene, polyphenylene sulfide, elastomer-based resin, and polyolefin-based resin.
  • FIG. 12 is a perspective view showing an example of the configuration of the sliding member used in the electromagnetic relay according to the sixth embodiment.
  • the sliding member 18 has a cylindrical shape.
  • the outer diameter of the sliding member 18 is a size that fits inside the cylindrical magnetic material that is the magnetic path constituent members 17a and 17b, and the inner diameter is larger than the outer diameter of the movable iron core 11.
  • the sliding member 18 has a protrusion 181 extending in the Z-axis direction on the inner surface facing the movable iron core 11. With such a configuration, the movable iron core 11 can reciprocate between the opening position and the closing position while sliding inside the sliding member 18.
  • the sliding member 18 can also be provided on the surface of the magnetic path constituent members 17a and 17b having the shapes shown in the second to fifth embodiments facing the movable iron core 11.
  • the electromagnetic relay 10 includes a sliding member 18 on a surface of the magnetic path constituent members 17a and 17b facing the movable iron core 11.
  • the movable iron core 11 can reciprocate between the open pole position and the closing position while sliding on the sliding member 18.
  • the frictional force due to the friction between the movable iron core 11 and the magnetic path constituent members 17a and 17b suppresses the movement of the movable iron core 11 from being hindered, and the movable iron core 11 can be operated smoothly. It has the effect of. It also has the effect of stabilizing the operation of the movable iron core 11.
  • FIG. 13 is a perspective view showing an example of the configuration of the magnetic path constituent member used in the electromagnetic relay according to the seventh embodiment. Since the overall configuration of the electromagnetic relay 10 is the same as that of the first embodiment, the description thereof will be omitted, and different parts will be described.
  • the magnetic path constituent members 17a and 17b have an arbitrary tubular shape.
  • the magnetic path components 17a and 17b have a polygonal or other cross-sectional shape perpendicular to the Z axis.
  • the magnetic path constituent members 17a and 17b are formed of a cylindrical magnetic material having a quadrangular cross-sectional shape perpendicular to the Z axis.
  • the magnetic path constituent members 17a and 17b of the seventh embodiment may be provided with the slit 171 described in the second embodiment, or the protrusion 172 described in the third embodiment may be provided.
  • the notch 173 described in the fourth embodiment may be provided.
  • the sliding member 18 of the sixth embodiment may be provided on the surface of the magnetic path constituent members 17a and 17b of the seventh embodiment on the movable iron core 11 side.
  • the magnetic path constituent members 17a and 17b are made of a magnetic material having an arbitrary tubular shape. As a result, the effect of improving the degree of freedom in designing the magnetic path constituent members 17a and 17b can be obtained in addition to the effect of the first embodiment.
  • the configuration shown in the above embodiments is an example, and can be combined with another known technique, can be combined with each other, and does not deviate from the gist. It is also possible to omit or change a part of the configuration.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Electromagnets (AREA)
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6395210U (enrdf_load_stackoverflow) * 1986-12-11 1988-06-20
JP2006081243A (ja) * 2004-09-07 2006-03-23 Nippon Pulse Motor Co Ltd リニアアクチュエータ
JP2012257396A (ja) * 2011-06-09 2012-12-27 Mitsubishi Electric Corp 電磁アクチュエータおよびそれを用いた電磁リレー

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6395210U (enrdf_load_stackoverflow) * 1986-12-11 1988-06-20
JP2006081243A (ja) * 2004-09-07 2006-03-23 Nippon Pulse Motor Co Ltd リニアアクチュエータ
JP2012257396A (ja) * 2011-06-09 2012-12-27 Mitsubishi Electric Corp 電磁アクチュエータおよびそれを用いた電磁リレー

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