JP5945843B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay.

  Conventionally, in order to shorten the duration of the arc generated between the contacts, a sealed electromagnetic relay in which a space in which the contacts are stored is sealed and gas is enclosed in the space has been provided. 1 is disclosed. Hereinafter, the electromagnetic relay described in Patent Document 1 will be briefly described with reference to the drawings. In the following description, the vertical and horizontal directions in FIG. 6 are defined as the vertical and horizontal directions.

  As shown in FIG. 6, the electromagnetic relay includes a pair of fixed terminals 100 each provided with a fixed contact 100A, a movable contact 101 that constitutes a movable contact that can be connected to and separated from each fixed contact 100A, and a shaft 102. And a movable iron core 103 that is connected to the movable contact 101. The electromagnetic relay also includes an electromagnet device 104 that drives the movable iron core 103 in a direction in which the movable contact 101 is moved toward and away from the fixed contact 100A.

  The electromagnetic relay includes a rectangular parallelepiped fixed terminal holding member 105 made of a heat-resistant material such as ceramic and having a lower surface opened. Two through holes 105A are provided on the upper surface of the fixed terminal holding member 105 side by side, and the fixed terminal 100 is inserted into each through hole 105A. The fixed terminal 100 is airtightly joined to the fixed terminal holding member 105 by brazing or the like. The fixed terminal holding member 105 is connected to the upper surface of the upper yoke 107 made of a magnetic material and flattened up and down via a cylindrical joining member 106 made of metal. The fixed terminal holding member 105 and the joining member 106, and the joining member 106 and the upper yoke 107 are hermetically joined to each other.

  An insertion hole 107 </ b> A through which the shaft 102 is inserted is vertically penetrated in the upper yoke 107, and the insertion hole 107 </ b> A is closed by a plunger cap 108 joined to the lower surface of the upper yoke 107. Here, a sealed sealing container is constituted by the fixed terminal holding member 105, the fixed terminal 100, the joining member 106, the upper yoke 107, and the plunger cap 108. A gas mainly composed of hydrogen is sealed, for example, at about 2 atm.

JP 2007-287524 A

  However, in the above conventional example, it is necessary to use a large number of parts in order to form an airtight space inside the sealed container, and a large number of joining steps are required between these parts in order to maintain the airtightness. There was a problem. Specifically, in the above-described conventional example, the fixed terminal 100, the joining member 106, the upper yoke 107, and the plunger cap 108 constitute a sealed container using a total of four parts. A joining process such as welding, brazing, and bonding is required (see the circle in FIG. 6). For this reason, conventionally, there has been a problem in that the cost increases due to the large number of parts forming the airtight space, the complexity of the part shape, and the complexity of the manufacturing process.

  The present invention has been made in view of the above points, and an object thereof is to provide an electromagnetic relay capable of forming an airtight space while suppressing an increase in cost.

An electromagnetic relay according to the present invention fixes a fixed contact and a movable contact that come in contact with each other, a contact block having a movable iron piece that makes the movable contact contact and separate from the fixed contact, and an electromagnet block that drives the movable iron piece to a substrate. The contact block includes a fixed terminal fixed to the substrate and provided with the fixed contact, a movable contact provided with the movable contact, and the movable contact in conjunction with the movable iron piece. A cart that moves the movable contact in a direction away from the seal, and the fixed contact and the movable contact, the movable contact, the cart, and the movable iron piece that are housed and bonded to the substrate to form an airtight space A container, and the electromagnet block includes an excitation winding and a fixed iron piece that attracts the movable iron piece by energizing the excitation winding, The fixed iron piece is arranged outside the sealing container, and the fixed iron piece is arranged inside the sealing container so as to face the first fixed iron piece arranged outside the sealing container and the movable iron piece. A second fixed iron piece, the first fixed iron piece and the second fixed iron piece are connected to each other through the sealing container, and the first fixed iron piece and the second fixed iron piece, Are formed separately and are connected by caulking each other with the sealing container interposed therebetween .
An electromagnetic relay according to the present invention fixes a fixed contact and a movable contact that come in contact with each other, a contact block having a movable iron piece that makes the movable contact contact and separate from the fixed contact, and an electromagnet block that drives the movable iron piece to a substrate. The contact block includes a fixed terminal fixed to the substrate and provided with the fixed contact, a movable contact provided with the movable contact, and the movable contact in conjunction with the movable iron piece. A cart that moves the movable contact in a direction away from the seal, and the fixed contact and the movable contact, the movable contact, the cart, and the movable iron piece that are housed and bonded to the substrate to form an airtight space A container, and the electromagnet block includes an excitation winding and a fixed iron piece that attracts the movable iron piece by energizing the excitation winding, The fixed iron piece is arranged outside the sealing container, and the fixed iron piece is arranged inside the sealing container so as to face the first fixed iron piece arranged outside the sealing container and the movable iron piece. A second fixed iron piece, the first fixed iron piece and the second fixed iron piece are connected to each other through the sealing container, and the first fixed iron piece and the second fixed iron piece, Are formed separately, and the first fixed iron piece has either a male screw or a female screw, and the second fixed iron piece is a female screw that is paired with the male screw or the female screw of the first fixed iron piece. Or it has any one of a male screw, It connects by screwing together with the said sealing container on both sides.

  In this electromagnetic relay, one end of the movable iron piece is fixed, and the other end is between a position approaching the second fixed iron piece and a position away from the second fixed iron piece with the one end as an axis. It is preferable that it is freely rotatable.

  In this electromagnetic relay, it is preferable that the sealing container is made of a magnetic material.

  In this electromagnetic relay, it is preferable that the contact block includes a permanent magnet disposed adjacent to the fixed contact and the movable contact so that a magnetic field acts in a direction intersecting with a current flowing between the contacts.

  The present invention has an effect that an airtight space can be formed while suppressing an increase in cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of the electromagnetic relay based on this invention, (a) is sectional drawing seen from the front, (b) is the A-A 'line sectional arrow view in (a). In the electromagnetic relay described above, (a) is a main part sectional view showing a case where the respective fixed iron pieces are joined by caulking, and (b) is a main part sectional view showing a case where the respective fixed iron pieces are joined by screwing. It is operation | movement explanatory drawing of an electromagnetic relay same as the above, (a) is sectional drawing seen from the front which shows an open state, (b) is sectional drawing seen from the front which shows a closing state. It is a figure which shows Embodiment 2 of the electromagnetic relay which concerns on this invention, (a) is sectional drawing seen from the front, (b) is a B-B 'line sectional arrow view in (a). It is a figure which shows Embodiment 3 of the electromagnetic relay which concerns on this invention, (a) is sectional drawing seen from the front, (b) is the C-C 'line sectional arrow view in (a). It is sectional drawing which shows the conventional electromagnetic relay.

  Hereinafter, each embodiment of an electromagnetic relay according to the present invention will be described with reference to the drawings. In the following description, the top, bottom, left, and right in FIG. 1A are defined as the top, bottom, left, and right directions, the front side of the page is the front direction, and the back side of the page is the back direction.

(Embodiment 1)
Hereinafter, Embodiment 1 of the electromagnetic relay according to the present invention will be described with reference to the drawings. In this embodiment, as shown in FIGS. 1A and 1B, the contact block 1, the electromagnet block 2 arranged outside the contact block 1 except for a part, the contact block 1 and the electromagnet block 2. And a substrate 3 made of a metal material to be fixed.

  The contact block 1 is integrally formed with a pair of fixed terminals 10 each provided with a fixed contact 10 </ b> A, a movable contact 11 provided with a pair of movable contacts 11 </ b> A contacting and separating from each fixed contact 10 </ b> A, and the movable contact 11. And a cart 12 that moves in the vertical direction. The contact block 1 includes a movable iron piece 13 that drives the cart 12, a base 14 and a cover 15 that sandwich the above members, and a sealing container 16 that covers the members and forms an airtight space therein. Prepare.

  The sealing container 16 is formed in, for example, a rectangular parallelepiped shape having a rear surface opened from a stainless steel plate, and a flange portion 16A that protrudes outward is integrally formed on the periphery of the opening. The opening of the sealing container 16 is closed by airtightly bonding the flange portion 16 </ b> A to the front surface of the substrate 3. In addition, you may form the sealing container 16 with ferrous materials, such as SPCC, 42 alloy, SUY, for example.

  The substrate 3 is provided with through-holes 3 </ b> A into which a pair of long, flat plate-like fixed terminals 10 are inserted along the front-rear direction along the left-right direction. In addition, the shape of each fixed terminal 10 may not be a flat plate shape as long as it is a rod shape. The fixed terminals 10 are fixed to the substrate 3 by performing simultaneous molding with the fixed terminals 10 inserted into the through holes 3A. During the simultaneous molding, a rectangular parallelepiped base 14 made of a resin material is formed on the front surface of the substrate 3. Further, since the resin material also enters between the fixed terminals 10 and the inner peripheral edges of the through holes 3A during the simultaneous molding, the fixed terminals 10 and the substrate 3 are insulated from each other by the resin material. The method for fixing each fixed terminal 10 to the substrate 3 is not limited to simultaneous molding as long as it can be hermetically sealed.

  As shown in FIG. 1A, fixed contacts 10 </ b> A that come in contact with and separate from a movable contact 11 </ b> A described later are fixed to the upper surface of the front end portion of each fixed terminal 10. A support portion 14 </ b> C that protrudes forward from the base 14 is provided between the fixed terminals 10. A circular insertion hole 14 </ b> D through which a cart 12 described later is inserted passes through the support portion 14 </ b> C. When the cart 12 is inserted into the insertion hole 14D, the cart 12 is restricted so as to move only in the vertical direction.

  Inside the sealing container 16, a resin case 15 is provided that covers an inner peripheral surface of the sealing container 16 and sandwiches each member such as the movable contact 11 and the movable iron piece 13 with the base 14. As shown in FIG. 1B, recesses 15A are respectively provided in the front portion of the case 15 so as to face the left and right contact pairs. When the contacts 10A and 11A are brought into contact with and separated from each other, the recesses 15A are provided. This is an arc extinguishing space for extinguishing the arc generated in the arc.

  On both the left and right sides of the arc extinguishing space, permanent magnets 14A are arranged so as to be embedded in portions projecting upward from the base 14 respectively. That is, a pair of permanent magnets 14A are arranged adjacent to each other with the left and right contact pairs interposed therebetween so that the magnetic field acts in a direction (left and right direction) intersecting with the current flowing between the contact points. The magnetic force generated from the permanent magnets 14A extends the arc generated when the contacts 10A and 11A come in contact with and away from each other, thereby improving the arc extinguishing performance.

  The movable contact 11 is formed in a long plate shape from, for example, a metal material such as copper, and movable contacts 11A contacting and separating from the fixed contact 10A are fixed to the lower surfaces of both end portions in the longitudinal direction. Further, on the upper side of the movable contact 11, a contact pressure spring 17 that biases the movable contact 11 in a direction (downward) in which the movable contact 11A is brought into contact with the fixed contact 10A is provided.

  The contact pressure spring 17 is formed of a coil spring, and an upper end portion thereof is fixed to a first holding portion 15B provided in the case 15 and a lower end portion thereof is in contact with a central portion in the longitudinal direction of the movable contactor 11. . The first holding portion 15 </ b> B is formed in a flat cylindrical shape so as to protrude downward from the upper surface of the case 15, and its diameter is slightly smaller than the diameter of the contact pressure spring 17. Therefore, the upper end portion of the contact pressure spring 17 is fixed to the first holding portion 15B by pushing and fitting the upper end portion of the contact pressure spring 17 into the first holding portion 15B.

  An upper end portion of a bar-shaped cart 12 made of an insulating material is attached to the lower surface of the central portion in the longitudinal direction of the movable contact 11. The cart 12 moves integrally with the movable contact 11 along the vertical direction, and the lower end of the cart 12 is a movable iron piece to be described later when the pole is open (the fixed contact 10A is separated from the movable contact 11A). 13 is pressed upward. Further, as already described, the movement of the cart 12 is restricted only in the vertical direction by being inserted into the insertion hole 14 </ b> D of the support portion 14 </ b> C provided integrally with the base 14. In addition, the movable contact 11 is restricted from moving in the front-rear direction by being sandwiched between the base 14 and the case 15 from both front and rear sides.

  The movable iron piece 13 is formed in a long plate shape with a metal material, and both left and right end portions thereof are arranged so as to face the left and right second fixed iron pieces 24 described later. A circular shaft hole (not shown) is provided in the right end portion of the movable iron piece 13 so as to penetrate in the front-rear direction, and a cylindrical shaft portion 14B protruding forward from the base 14 is provided in this shaft hole. Is inserted. Therefore, the movable iron piece 13 is rotatable between a position where the movable iron piece 13 is attracted and approached by the second fixed iron piece 24 with the shaft portion 14B as an axis and a position away from the second fixed iron piece 24. The movable iron piece 13 is restricted from moving in the front-rear direction by being sandwiched between the base 14 and the case 15 from both front and rear sides.

  A return spring 18 that biases the movable iron piece 13 in a direction (upward) away from the fixed contact 10A is provided below the left end portion of the movable iron piece 13. The return spring 18 is formed of a coil spring, and a lower end portion thereof is fixed to a second holding portion 15 </ b> C provided in the case 15, and an upper end portion thereof is in contact with the left end portion of the movable iron piece 13. The second holding portion 15 </ b> C is formed in a flat cylindrical shape so as to protrude upward from the lower surface of the case 15, and its diameter is slightly smaller than the diameter of the return spring 18. Therefore, the lower end portion of the return spring 18 is fixed to the second holding portion 15C by pushing and fitting the lower end portion of the return spring 18 into the second holding portion 15C.

  The electromagnet block 2 drives the movable iron piece 13, and as shown in FIG. 1A, a cylindrical coil bobbin 20, an excitation winding 21 wound around the coil bobbin 20, and an excitation winding 21 And a pair of coil terminals (not shown) connected at both ends. Further, as shown in FIG. 1B, the electromagnet block 2 is formed integrally with the first fixed iron piece 23 and the first fixed iron piece 23 disposed on the coil bobbin 20 and inside the sealed container 16. And a second fixed iron piece 24 disposed on the surface.

  The coil bobbin 20 includes a main body portion 20A formed in a cylindrical shape from a resin material, and a flange portion 20B formed to protrude in the radial direction at each of the left and right end portions. In addition, the exciting winding 21 is configured by winding a conducting wire around the main body portion 20A. Both ends of the excitation winding 21 are connected to a pair of coil terminals, respectively, and the excitation winding 21 is energized by passing an excitation current through each coil terminal.

  A rectangular plate-shaped yoke 22 made of a magnetic material is fixed to each flange 20B. Further, a first fixed iron piece 23 made of a magnetic material is disposed inside the main body 20A. The first fixed iron piece 23 is formed by integrally forming a columnar main portion 23A disposed inside the main body portion 20A and a pair of side portions 23B protruding upward from the left and right end portions of the main portion 23A. Composed. Each side part 23B of the first fixed iron piece 23 is arranged so as to face both the left and right end parts of the movable iron piece 13, and the upper end part thereof is arranged in the vicinity of the sealing container 16.

  The second fixed iron pieces 24 are arranged inside the sealed container 16 so as to face the left and right ends of the movable iron piece 23, respectively. And each side part 23B of each 1st fixed iron piece 23 and each 2nd fixed iron piece 24 are mutually connected via the insertion hole 16B penetrated in the up-down direction in the right-and-left both sides of the sealing container 16 lower surface. Yes. The diameter of each insertion hole 16B is smaller than the diameter of each of the side portion 23B and the second fixed iron piece 24. In the present embodiment, the yoke 22, the first fixed iron piece 23, the second fixed iron piece 24, and the movable iron piece 13 constitute a magnetic circuit. The second fixed iron piece 24 is sucked.

  As a method of connecting the side portions 23 of the first fixed iron pieces 23 and the second fixed iron pieces 24 to each other, for example, a method of caulking each other is conceivable. That is, as shown in FIG. 2A, a protruding portion 23C that protrudes upward and is inserted into the insertion hole 16B is integrally formed at the upper end portion of each side portion 23, and each second fixed iron piece 24 is formed. Are provided with a recess 24A in which the lower surface is opened and the protrusion 23C is inserted. Then, each side 23 and each second fixed iron piece 24 are connected to each other by inserting each protrusion 23C into each recess 24A and pressurizing and caulking. At this time, since each insertion hole 16 </ b> B is blocked by each side portion 23, the airtight performance of the sealing container 16 is maintained.

  Further, as shown in FIG. 2B, male threads are formed on the outer peripheral surface of each protrusion 23C, female threads are formed on the inner peripheral surface of each recess 23A, and each protrusion 23C is fastened to each recess 24A. Thus, the side portions 23 and the second fixed iron pieces 24 may be connected to each other. Also in this case, since each insertion hole 16B is closed by each side part 23, the airtight performance of the sealing container 16 is maintained.

  Hereinafter, the operation of this embodiment will be described. When the exciting winding 21 of the electromagnet block 2 is energized, the left end portion of the movable iron piece 13 is attracted to the second fixed iron piece 24 on the left side against the biasing force of the return spring 18, and the left end portion of the movable iron piece 13 is counterclockwise. Rotate around. Thereby, since the movable iron piece 13 is separated from the cart 12, the force for pressing the cart 12 upward is lost, and the cart 12 and the movable contactor 11 are moved downward by the biasing force of the contact pressure spring 17. Then, each movable contact 11A and each fixed contact 10A come into contact with each other to close the pole (see FIG. 3B).

  Thereafter, when energization to the exciting winding 21 is stopped, the attractive force by the electromagnet block 2 is lost, so the left end portion of the movable iron piece 13 is rotated clockwise by the urging force of the return spring 18 and the cart 12 is turned upward. Press. As a result, the cart 12 and the movable contact 11 move upward against the biasing force of the contact pressure spring 17, so that each movable contact 11A opens away from each fixed contact 10A (see FIG. 3A). ).

  As described above, in this embodiment, since the hermetic space can be formed by joining the sealing container 16 to the substrate 3, the hermetic sealing structure can be simplified, and the components necessary for sealing. The score can be reduced as compared with the conventional one. Here, in this embodiment, between each fixed terminal 10 and the board | substrate 3, between the sealing container 16 and the board | substrate 3, between the electromagnet block 2 and the board | substrate 3, each side part of the 1st fixed iron piece 23 A total of four joints between 23B and the sealing container 16 are required. However, since all the joints except for the joints between the side portions 23B and the sealing container 16 are for the substrate 3, the joining process can be summarized and the manufacturing process is simplified as compared with the conventional case. can do.

  Moreover, in this embodiment, the airtight performance regarding the insertion hole 16B of the sealing container 16 and the airtight performance regarding the through-hole of the board | substrate 3 are test | inspected independently, and the quality goods which passed each test | inspection can be combined. . For this reason, in this embodiment, compared with the case where the airtight performance of an assembly completion product is inspected as in the prior art, it is possible to easily achieve an improvement in yield and cost reduction. Therefore, this embodiment can form an airtight space while suppressing an increase in cost.

  Moreover, in this embodiment, since the 1st fixed iron piece 23 and the 2nd fixed iron piece 24 are mutually connected through the sealing container 16, it prevents that a magnetic force attenuate | damps and magnetic efficiency falls. can do.

  By the way, it is conceivable that the electromagnet block 2 is also housed in the sealed container 16. However, since the conducting wire constituting the exciting winding 21 is generally a member containing a large amount of organic matter, the organic matter generated from the conducting wire is fixed contact 10A. Or may adhere to the movable contact 11A. As a result, the contact resistance of the fixed contact 10A and the movable contact 11A increases, or a conduction failure occurs, which is not preferable. This problem is particularly noticeable in high-capacity relays that allow a large current to flow between the contacts. That is, in the high capacity relay, it is necessary to reduce the contact resistance in order to flow a large current safely by suppressing the temperature of the relay, and the above problem of increasing the contact resistance should be avoided.

  Therefore, in the present embodiment, the electromagnet block 2 is disposed outside the sealing container 16 as described above. Thereby, since the exciting winding 21 is not located in the sealing container 16, it can avoid that said problem arises.

(Embodiment 2)
Hereinafter, Embodiment 2 of the electromagnetic relay according to the present invention will be described with reference to the drawings. However, since the basic configuration of the present embodiment is common to that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the movable iron piece 13 is not rotated about its one end, but as shown in FIGS. 4A and 4B, the movable iron piece 13 has its longitudinal direction parallel to the left-right direction. It is characterized by being moved along the vertical direction while maintaining the state.

  In the present embodiment, as shown in FIG. 4A, the right end portion of the movable iron piece 13 is not provided with a shaft hole, and the base 14 is not provided with a shaft portion 14B. Instead, ribs 14 </ b> E protruding forward and facing the left and right ends of the movable iron piece 13 are provided on both the left and right sides of the base 14 in order to restrict the movement of the movable iron piece 13 in the left-right direction. Thereby, the movement of the movable iron piece 13 is restricted only in the vertical direction. Further, the second holding portion 15C is provided in the central portion of the lower surface of the case 15 in the left-right direction. As a result, the return spring 18 is also arranged at the central portion in the left-right direction, and the upper end thereof is in contact with the central portion in the left-right direction of the movable iron piece 13.

  Hereinafter, the operation of this embodiment will be described. When the exciting winding 21 of the electromagnet block 2 is energized, the movable iron piece 13 is attracted to the second fixed iron piece 24 against the urging force of the return spring 18, and the movable iron piece 13 moves downward. Thereby, since the movable iron piece 13 is separated from the cart 12, the force for pressing the cart 12 upward is lost, and the cart 12 and the movable contactor 11 are moved downward by the biasing force of the contact pressure spring 17. And when each movable contact 11A and each fixed contact 10A contact, it will close.

  Thereafter, when energization to the excitation winding 21 is stopped, the attractive force by the electromagnet block 2 is lost, so the movable iron piece 13 moves upward by the urging force of the return spring 18 and presses the cart 12 upward. As a result, the cart 12 and the movable contact 11 move upward against the urging force of the contact pressure spring 17, so that each movable contact 11A opens away from each fixed contact 10A.

  As described above, the present embodiment can achieve the same effects as those of the first embodiment, although the drive format is different from that of the first embodiment.

(Embodiment 3)
Hereinafter, Embodiment 3 of the electromagnetic relay according to the present invention will be described with reference to the drawings. In this embodiment, as shown in FIGS. 5A and 5B, the single-sided contact block 4, the electromagnet block 2 disposed outside the contact block 4, the contact block 4 and the electromagnet block 2, And a substrate 3 to which is attached. Since the electromagnet block 2 and the substrate 3 are the same as those in the first and second embodiments, the description thereof is omitted.

  The contact block 4 pivotally supports the first fixed terminal 40 provided with the fixed contact 40A, the movable contact 41 provided with the movable contact 41A contacting and separating from the fixed contact 40A, and the movable contact 41. A second fixed terminal 42. The contact block 4 covers the cart 43 that presses the movable contact 41, the movable iron piece 44 that drives the cart 43, the base 45 and the cover 46 that sandwich the members, and the members. And a sealed container 47 that forms an airtight space.

  The sealing container 47 is formed in a rectangular parallelepiped shape having a rear surface opened from, for example, a stainless steel plate, as in the sealing container 16 of each of the above-described embodiments, and protrudes outward at the periphery of the opening over the entire circumference. The flange portion 47A is integrally formed. The opening of the sealing container 47 is closed by airtightly bonding the flange portion 47 </ b> A to the front surface of the substrate 3. In addition, you may form the sealing container 47 with ferrous materials, such as SPCC, 42 alloy, and SUY, for example.

  The substrate 3 is provided with a through-hole 3A into which a flat plate-like first fixed terminal 40 and a second fixed terminal 42 that are long along the front-rear direction are inserted. In addition, the shape of each fixed terminal 40 and 42 may not be a flat plate shape as long as it is a rod shape. The fixed terminals 40 and 42 are fixed to the substrate 3 by performing simultaneous molding with the fixed terminals 40 and 42 inserted into the through holes 3A. During this simultaneous molding, a base 45 made of a resin material is formed on the front surface of the substrate 3 so as to cover the periphery excluding the front end portions of the fixed terminals 40 and 42 (FIGS. 5A and 5A). b)). Further, since the resin material also enters between the fixed terminals 40 and 42 and the inner peripheral edge of each through-hole 3A during the simultaneous molding, the resin material is used between the fixed terminals 40 and 42 and the substrate 3. Insulated. The method for fixing the fixed terminals 40 and 42 to the substrate 3 is not limited to simultaneous molding as long as it can be hermetically sealed.

  On the upper surface of the front end portion of the first fixed terminal 40, as shown in FIG. 5A, a fixed contact 40A that contacts and separates from a movable contact 41A described later is fixed. Further, as shown in FIG. 5A, a left end portion of a movable contact 41 described later is fixed to the lower surface of the front end portion of the second fixed terminal 42. The movable contact 41 is formed in a long plate shape from a metal material such as copper, for example, and a movable contact 41A that contacts and separates from the fixed contact 40A is fixed to the lower surface of the right end portion thereof. The movable contact 41 is restricted from moving in the front-rear direction by being sandwiched between the base 45 and a case 46 described later from both front and rear sides.

  On the upper side of the movable contact 41, a contact pressure spring 48 that urges the movable contact 41 in a direction (downward) in which the movable contact 41A is brought into contact with the fixed contact 40A is provided. The contact pressure spring 48 is formed of a leaf spring that is long in the left-right direction, and its left end is fixed to the upper surface of the front end of the second fixed terminal 42, and the right end abuts against the upper surface of the movable contact 41. ing.

  Inside the sealing container 47, a resin case 46 is provided that covers the inner peripheral surface of the sealing container 47 and sandwiches each member such as the movable contact 41 and the movable iron piece 44 with the base 45. As shown in FIG. 5 (b), a concave portion 46A is provided at a portion facing the contact pair in the front portion of the case 46, and the concave portion 46A is an arc generated when the respective contacts 40A and 41A come in contact with and separate from each other. It is an arc extinguishing space for extinguishing the arc.

  On the right side of the arc extinguishing space, a permanent magnet 45A is disposed so as to be embedded in a portion protruding upward from the base 45. That is, the permanent magnets 45A are arranged adjacent to each other so that the magnetic field acts in a direction (left-right direction) intersecting the current flowing between the contacts. The magnetic force generated from the permanent magnet 45A extends the arc generated when the contacts 40A and 41A come in contact with and away from each other, thereby improving the arc extinguishing performance.

  The movable iron piece 44 is formed in a long plate shape from a metal material, and both left and right end portions thereof are arranged to face the left and right second fixed iron pieces 24, respectively. A circular shaft hole (not shown) is provided in the right end portion of the movable iron piece 44 so as to penetrate in the front-rear direction, and a cylindrical shaft portion 45B protruding forward from the base 45 is provided in this shaft hole. Is inserted. Therefore, the movable iron piece 44 is rotatable between a position where the movable iron piece 44 is attracted and approached by the second fixed iron piece 24 around the shaft portion 45B and a position away from the second fixed iron piece 24. The base 45 is provided with a cylindrical protrusion 45C protruding forward, separately from the shaft part 45B, and the protrusion 45C restricts the movable iron piece 44 from rotating more than necessary. . The movable iron piece 44 is restricted from moving in the front-rear direction by being sandwiched between the base 45 and the case 46 from both the front and rear sides.

  On the upper surface of the movable iron piece 44, the lower end portion of the cart 43 having an inverted L shape in cross section is fixed. The cart 43 moves integrally with the movable iron piece 44, and its upper end is in contact with the movable contact 41. Accordingly, in a state where the movable iron piece 44 is not attracted by the second fixed iron piece 24, the cart 43 rotates clockwise together with the movable iron piece 44, and the upper end portion presses the movable contact 41 upward. ing.

  On the upper side of the movable iron piece 44, a return spring 49 that biases the movable iron piece 44 in a direction (upward) away from the movable contact 41A from the fixed contact 40A is provided. The return spring 49 is a leaf spring having an inverted L shape in cross section, and is fixed in such a manner that its right end is embedded in the base 45, and its left end is fixed to the upper surface of the movable iron piece 44.

  In the present embodiment, the yoke 22, the first fixed iron piece 23, the second fixed iron piece 24, and the movable iron piece 44 constitute a magnetic circuit. 44 is sucked into the second fixed iron piece 24.

  Hereinafter, the operation of this embodiment will be described. When the exciting winding 21 of the electromagnet block 2 is energized, the left end portion of the movable iron piece 44 is attracted to the left second fixed iron piece 24 against the urging force of the return spring 49, and the left end portion of the movable iron piece 44 is counterclockwise. Rotate around. Along with this, the cart 43 also rotates counterclockwise, so that the force that the cart 43 presses the movable contact 41 upward is lost, and the movable contact 41 moves downward by the biasing force of the contact pressure spring 48. . The movable contact 41A and the fixed contact 40A come into contact with each other to close the contact.

  Thereafter, when energization to the excitation winding 21 is stopped, the attractive force by the electromagnet block 2 is lost, so the left end portion of the movable iron piece 44 is rotated clockwise by the urging force of the return spring 18. Along with this, the cart 43 also rotates clockwise, so that the cart 43 presses the movable contact 41 upward. As a result, the movable contact 41 moves upward against the urging force of the contact pressure spring 48, so that the movable contact 41A opens away from the fixed contact 40A.

  As described above, although this embodiment is different from each of the above embodiments in that the contact is a one-sided type, the same effects as those of the above embodiments can be achieved. Further, in this embodiment, the number of contacts required is smaller than that of the double-cut electromagnetic relay as in each of the above embodiments, and the number of parts can be reduced, thereby reducing the cost. it can.

  By the way, conventionally, since the plunger cap 108 made of a nonmagnetic material is interposed in the middle of the magnetic circuit composed of the upper yoke 107 or the like, there has been a problem that the magnetic efficiency is attenuated and the magnetic efficiency is lowered. In each of the above embodiments, since the electromagnet block 2 is not housed in the sealing containers 16 and 47, it is not necessary to use the plunger cap 108 to form an airtight space as in the prior art. When 47 is formed of a nonmagnetic material, the above problem may occur.

  Therefore, in each of the above embodiments, it is desirable to form the sealing containers 16 and 47 with a magnetic material such as ferritic stainless steel. If comprised in this way, the magnetic efficiency can be improved, without the member which consists of nonmagnetic materials in the middle of a magnetic circuit.

DESCRIPTION OF SYMBOLS 1 Contact block 10 Fixed terminal 10A Fixed contact 11 Movable contact 11A Movable contact 12 Cart 13 Movable iron piece 14A Permanent magnet 16 Sealing container 2 Electromagnet block 21 Excitation winding 23 First fixed iron piece 24 Second fixed iron piece 3 Substrate

Claims (5)

A contact block having a fixed contact and a movable contact contacting and separating from each other, and a contact block having a movable iron piece for contacting and separating the movable contact with the fixed contact, and an electromagnet block for driving the movable iron piece are fixed to a substrate, and the contact block A fixed terminal fixed to the substrate and provided with the fixed contact, a movable contact provided with the movable contact, and the movable contact in a direction to move the movable contact away from the fixed contact in conjunction with the movable iron piece. A cart for moving a child; and a sealed container for accommodating the fixed contact and the movable contact, the movable contact, the cart, and the movable iron piece and joined to the substrate to form an airtight space, and the electromagnet The block includes an excitation winding and a fixed iron piece that attracts the movable iron piece by energizing the excitation winding, and the electromagnet block is arranged outside the sealing container. The fixed iron piece includes a first fixed iron piece arranged outside the sealed container and a second fixed iron piece arranged inside the sealed container so as to face the movable iron piece. The first fixed iron piece and the second fixed iron piece are connected to each other through the sealing container ,
The electromagnetic relay, wherein the first fixed iron piece and the second fixed iron piece are formed separately and are connected by caulking each other with the sealing container interposed therebetween . A contact block having a fixed contact and a movable contact contacting and separating from each other, and a contact block having a movable iron piece for contacting and separating the movable contact with the fixed contact, and an electromagnet block for driving the movable iron piece are fixed to a substrate, and the contact block A fixed terminal fixed to the substrate and provided with the fixed contact, a movable contact provided with the movable contact, and the movable contact in a direction to move the movable contact away from the fixed contact in conjunction with the movable iron piece. A cart for moving a child; and a sealed container for accommodating the fixed contact and the movable contact, the movable contact, the cart, and the movable iron piece and joined to the substrate to form an airtight space, and the electromagnet The block includes an excitation winding and a fixed iron piece that attracts the movable iron piece by energizing the excitation winding, and the electromagnet block is arranged outside the sealing container. The fixed iron piece includes a first fixed iron piece arranged outside the sealed container and a second fixed iron piece arranged inside the sealed container so as to face the movable iron piece. The first fixed iron piece and the second fixed iron piece are connected to each other through the sealing container,
The first fixed iron piece and the second fixed iron piece are formed separately from each other, the first fixed iron piece has either a male screw or a female screw, and the second fixed iron piece is the first fixed iron piece. the external thread or the internal thread and the paired have either of the female screw or the male screw, the to that electrostatic磁継collector characterized in that it is connected by screwing each other across a sealing container fixed iron piece has. One end of the movable iron piece is fixed, and the other end is rotatable between a position approaching the second fixed iron piece and a position away from the second fixed iron piece with the one end as an axis. the electromagnetic relay according to claim 1 or 2, characterized in that there. The sealing container, the electromagnetic relay according to any one of claims 1 to 3, characterized in that it is formed of a magnetic material. The said contact block is provided with the permanent magnet arrange | positioned adjacent to the said fixed contact and the said movable contact so that a magnetic field may act in the direction which cross | intersects the electric current which flows between contacts . The electromagnetic relay according to item 1 .

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