JP4281684B2 - Electromagnet device for relay - Google Patents

Description

  The present invention relates to a relay electromagnet device used for driving a contact device of an electromagnetic relay.

  Conventionally, as an electromagnet device used for an electromagnetic relay, a coil bobbin in which a coil is wound, an iron core having a magnetic pole piece at one end, and an iron core magnetically coupled to the other end of the iron core. A yoke having leg pieces facing each other and an armature block having a pair of magnetic pole plates arranged on both sides of the iron core magnetic pole piece, and between the magnetic pole plate and the magnetic pole piece when the coil is energized There is known a configuration in which an amateur block is moved by a magnetic force acting on the. The amateur block is pivotally attached to the coil bobbin, and moves between a position where the magnetic pole plate contacts the magnetic pole piece of the iron core and a position where the magnetic pole plate contacts the leg piece of the yoke (e.g. Patent Document 1).

The electromagnet device described in Patent Document 1 is a polarized electromagnet, and includes a permanent magnet that magnetizes each magnetic pole plate to a different magnetic pole between a pair of magnetic pole plates. This type of electromagnet device is schematically shown in FIG. In the illustrated example, the magnetic pole piece 42b provided at one end of the iron core 42 and one end of the pair of leg pieces 43a and 43b of the U-shaped or U-shaped yoke 43 are opposed to each other. Magnetic pole plates 54a and 54b are inserted into the gaps between the leg pieces 43a and 43b, respectively. A permanent magnet 55 is sandwiched between the magnetic pole plates 54a and 54b. The iron core 42 is inserted into the coil bobbin 41 around which the coil 40 is wound, and when the polarity for exciting the magnetic pole piece 42b is changed by energizing the coil 40, the amateur block 7 including the magnetic pole plates 54a and 54b and the permanent magnet 55 is provided. Moves between a position where the magnetic pole plate 54a is brought into contact with the magnetic pole piece 42b and a position where the magnetic pole plate 54b is brought into contact with the magnetic pole piece 42b.
Japanese Patent Laid-Open No. 11-45646 (paragraphs 0011-0012, FIGS. 1 and 3)

  By the way, the U-shaped or U-shaped yoke 43 as described above increases the volume of the coil 40 when the wire diameter of the coil 40 is increased or the number of turns is increased. As a result, the distance between the leg pieces 43a and 43b is increased. Therefore, if the coil 40 is enlarged in order to increase the driving force for driving the amateur block 7, the stroke of the amateur block 7 also increases. On the other hand, the stroke of the amateur block 7 must be adapted to the specifications of the contact device that is opened and closed by the amateur block 7. In short, when the yoke 43 having the above-described shape is employed, both the driving force and the stroke of the armature block 7 depend on the volume of the coil 40, so that the driving force and the stroke cannot be designed separately.

  In order to adjust the stroke, it can be considered that the leg pieces 43a and 43b of the yoke 43 are bent as shown in FIG. 14B. However, the yoke 43 having such a shape has many places to be bent. As a result, there arises a problem that the dimensional variation of each product tends to occur, and as a result, the driving force of the amateur block 7 also tends to vary.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described reasons, and an object of the present invention is to make it possible to design a gap interval regardless of the size of the coil and to reduce the gap gap variation for each product. Is to provide.

The invention of claim 1 includes a coil bobbin including a shaft portion around which a coil is wound and a pair of flange portions integrally provided at both ends of the shaft portion, a portion inserted through the shaft portion of the coil bobbin, and a shaft portion of the portion An iron core having a pole piece formed at one end of the coil bobbin and projecting from one end of the coil bobbin within one surface including the direction of insertion into the magnet, and magnetically applied to the other end of the iron core at the other end of the coil bobbin from the other end of the combined iron core and the yoke having a leg which face each other with a gap on both sides in the thickness direction of the extension to the one end and magnetic iron core pole pieces of the iron core pole piece and the yoke An armature block having a pair of magnetic pole plates inserted between each leg piece and reciprocating between two prescribed positions by a magnetic force acting on the magnetic pole plate by energizing the coil, and a leg piece of the yoke It has a holding groove that is inserted along the extension direction of the piece. Slide the leg of the click, characterized in that it comprises an auxiliary yoke to reduce the spacing gap between the pole piece than the non-attached state to a mountable in the mounted state of the yoke.

  According to this configuration, since the auxiliary yoke that can be attached to the leg piece of the yoke is provided, the gap interval can be designed according to the size of the auxiliary yoke regardless of the coil volume. Further, since the auxiliary yoke is a member different from the yoke and can be attached to the yoke, if the auxiliary yoke is not used, the gap interval is determined by the interval between the leg pieces of the yoke. Furthermore, since the auxiliary yoke has a holding groove and is attached by sliding along the extending direction of the leg pieces of the yoke, the auxiliary yoke does not move in a direction orthogonal to the extending direction of the yoke, and the auxiliary yoke is a separate member from the yoke. Despite this, the occurrence of gap dimensional variations can be suppressed. That is, the driving force and the stroke of the amateur block can be individually designed, and variations among products can be reduced.

  According to a second aspect of the present invention, in the first aspect of the present invention, a mounting groove into which a part of the auxiliary yoke is inserted is formed in the leg piece of the yoke, and a mounting groove is formed on an inner peripheral surface of the mounting groove. A fixed protrusion is provided so as to project into the auxiliary yoke when the yoke is caulked at a corresponding portion.

  According to this configuration, since the mounting groove is provided in the yoke and a part of the auxiliary yoke is inserted into the mounting groove, the auxiliary yoke can be positioned with respect to the yoke, and the auxiliary yoke is coupled to the yoke by caulking the yoke. The auxiliary yoke can be brought into close contact with each other, the magnetic resistance between the auxiliary yoke and the yoke is small, and the magnetic force of the coil can be used without waste while using the auxiliary yoke which is a separate member from the yoke. In addition, since the fixing protrusion that cuts into the auxiliary yoke is provided, the fixing strength of the auxiliary yoke with respect to the yoke is high and the auxiliary yoke does not fall off from the yoke. In addition, an adhesive is used to fix the auxiliary yoke to the yoke. Therefore, there will be no malfunction caused by the adhesive adhering to unnecessary portions.

  According to a third aspect of the present invention, in the first aspect of the present invention, a fitting projection is provided on one of the inner surface of the holding groove and the leg piece, and a fitting recess is provided on the other to fit the fitting projection. It is characterized by being.

  According to this configuration, since the fitting protrusion and the fitting recess are fitted, the auxiliary yoke is not dropped from the yoke. In addition, when the auxiliary yoke is fixed to the yoke, since no adhesive is used, there is no malfunction caused by adhesion of the adhesive to unnecessary portions, and no caulking work is required, so that the number of processing steps is reduced.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a part of the auxiliary yoke is disposed on the collar part located between the other end parts of both leg pieces of the collar part on the one end side of the coil bobbin. A positioning groove for positioning the auxiliary yoke is formed by inserting.

  According to this configuration, since the auxiliary yoke is positioned by the coil bobbin, the position accuracy of the auxiliary yoke can be increased. As a result, it is possible to suppress variation for each product in the mounting position of the auxiliary yoke with respect to the yoke.

  According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the armature block includes two side frame plates that sandwich the coil bobbin, and two shaft pins are provided on the opposite sides of the coil bobbin. The armature block is pivotally attached to the coil bobbin by inserting a shaft pin into a shaft hole provided in each side frame plate.

  According to this configuration, since the armature block moves with the two shaft pins as the rotation center, the armature block does not tilt during the movement, and the armature block can be moved smoothly without rattling.

According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, the iron core has a center line along the axial direction of the coil bobbin at a center in the width direction of the magnetic pole piece and a portion inserted through the coil bobbin. The center line in the width direction of the coil bobbin does not coincide with the center line along the axial direction of the coil bobbin, and the coil bobbin is formed with a fitting groove for fitting with a part of the iron pole piece. .

  According to this configuration, since the direction of the iron core is uniquely determined with respect to the coil bobbin, reverse assembly of the coil bobbin and the iron core is prevented. In addition, when the iron core is formed by shearing, both sides of the iron core are front and back, but the mounting direction of the iron core with respect to the coil bobbin is the same for all products, so there is a gap between the iron core and the pole block of the amateur block. The magnetic force acting on the product does not vary from product to product, leading to stabilization of characteristics.

  According to a seventh aspect of the present invention, in the first to sixth aspects of the invention, the armature block includes a rectangular frame-shaped main body frame portion that holds the magnetic pole plate, and is sandwiched between the magnetic pole plates so that the magnetic pole plates are different from each other. A permanent magnet that magnetizes the magnetic pole and both magnetic pole plates are press-fitted and held in the opening of the main body frame.

  According to this configuration, since the permanent magnet and the magnetic pole plate are press-fitted and held in the opening of the rectangular frame-shaped main body frame portion in the amateur block, the permanent magnet and the magnetic pole plate can be fixed without using an adhesive. Can do.

  According to an eighth aspect of the present invention, in the first to seventh aspects of the present invention, the armature block has an auxiliary frame portion having a shape in which the end portions of two arms are integrally connected by a bridge, and the auxiliary frame portion. Is characterized in that an operating piece for moving the amateur block by manual operation is extended.

  According to this configuration, since the operation piece that enables the movement of the amateur block by manual operation is provided in the auxiliary frame portion having a shape in which the two arms are integrally connected by the bridge, the strength of the holding frame portion is increased. The external force acting on the operating piece can be transmitted to the amateur block without loss. As a result, a good operational feeling can be obtained when the amateur block is moved manually.

  According to the configuration of the present invention, since the auxiliary yoke that can be attached to the leg piece of the yoke is provided, there is an advantage that the gap interval can be designed according to the size of the auxiliary yoke regardless of the volume of the coil. Further, since the auxiliary yoke has a holding groove and is attached by sliding along the extending direction of the leg pieces of the yoke, the auxiliary yoke does not move in a direction perpendicular to the extending direction of the yoke, and the auxiliary yoke is a separate member from the yoke. In spite of this, there is an advantage that the occurrence of gap dimensional variation can be suppressed.

As shown in FIG. 2, the electromagnetic relay of the present embodiment has a container body 1 composed of a body 11, an intermediate body 12, and a cover 13. The contact devices 3A and 3B, the auxiliary contact device 4, and the electromagnet device 5 are accommodated (see FIGS. 3 and 4). For example, PBT (polybutylene terephthalate) is used for the body 11, the intermediate body 12, and the cover 13. The body 11 has an outer peripheral wall 11 b extending along the periphery of the side plate 11 a on one surface in the thickness direction of the side plate 11 a (upper surface in FIG. 2). It is formed in the set shape. That is, the body 11 is formed in a shape having an opening on one surface in the thickness direction of the side plate 11a and the other surface closed.

The intermediate body 12 is overlaid on the opening side of the body 11 in the thickness direction of the side plate 11 a of the body 11. The intermediate body 12 includes an intermediate plate 12a that faces the side plate 11a of the body 11 in a state in which the intermediate body 12 is stacked on the body 11, and the intermediate plate 12a has an intermediate plate 12a on one surface in the thickness direction (upper surface in FIG. 2). An outer peripheral wall 12b that is substantially flush with the outer peripheral wall 11b of the body 11 when the body 12 is stacked is provided upright. Accordingly, the intermediate body 12 is formed in a shape having an opening on one surface in the thickness direction of the intermediate plate 12a in the same manner as the body 11. However, a through hole 12c is formed at the center of the intermediate plate 12a in the intermediate body 12.

  The cover 13 is stacked on the opening side of the intermediate body 12 in the thickness direction of the intermediate plate 12a of the intermediate body 12. The cover 13 is plate-shaped and faces the intermediate plate 12 a of the intermediate body 12 in a state where the cover 13 is overlapped with the intermediate body 12. The outer peripheral shapes of the side plate 11a of the body 11, the intermediate plate 12a of the intermediate body 12, and the cover 13 are formed in substantially the same shape.

  The body 11, the intermediate body 12, and the cover 13 are coupled using five caulking pins (not shown). In the body 11, the intermediate body 12, and the cover 13, fixing holes 11d, 12d, and 13d are penetratingly provided at portions where caulking pins are inserted. The fixing holes 11d, 12d, and 13d are formed inside the outer peripheral walls 11b and 12b and in the vicinity of corner portions of the container 1 or terminals that will be described later. The reason why it is provided in the vicinity of the terminal is to prevent the opening of the container body 1 from being caused by an external force acting during the operation of connecting or disconnecting the electric wire to the terminal. Engaging protrusions 12e that mesh with the engaging recesses 11e and 13e provided on the outer periphery of the body 11 and the cover 13 are formed on the outer peripheral part of the intermediate body 12, and the engaging recesses 11e and 13e and the engaging protruding piece The body 11, the intermediate body 12, and the cover 13 are positioned by meshing with 12 e.

  The configuration example of FIG. 2 shows a so-called double-cut electromagnetic relay having two sets of contacts that are respectively inserted into two wires serving as power supply paths from the power source to the load. Each set of contacts includes main contact devices 2A and 2B and arc contact devices 3A and 3B, respectively. Main contact device 2A and arc contact device 3A are connected in parallel, and main contact device 2B and arc contact device 3B are connected in parallel.

  Hereinafter, the main contact devices 2A and 2B and the arc contact devices 3A and 3B will be described in detail with reference to FIG. The main contact devices 2A and 2B and the arc contact devices 3A and 3B include a fixed terminal plate 21A and 21B, a movable terminal plate 22A and 22B, a main contact spring 23 including a plate spring, and an arc contact spring 24 including a plate spring. Is the main component. A main movable contact 25 is fixed to an intermediate portion in the longitudinal direction of each main contact spring 23, and an arc movable contact 26 is fixed to each arc contact spring 24. A main fixed contact 27 to which the main movable contact 25 is separated and connected and an arc fixed contact 28 to which the arc movable contact 26 is separated are fixed to the fixed side terminal plates 21A and 21B. Here, a low contact resistance material is selected for the main movable contact 25 and the main fixed contact 27, and a welding-resistant material is selected for the arc movable contact 26 and the arc fixed contact 28.

  The fixed-side terminal plates 21A and 21B are formed in an L shape having a main piece 21a and a first branch piece 21b arranged along two adjacent surfaces on the outer peripheral walls 11b and 12b of the container body 1, respectively. From the side edge of the intermediate part in the longitudinal direction of the main piece 21a, a second branch piece 21c whose thickness direction is substantially orthogonal to the main piece 21a branches. As described above, the first branch piece 21b extended in one direction in the thickness direction of the main piece 21a is provided at one end in the longitudinal direction of the main piece 21a, and the main piece 21a extends from the other end in the longitudinal direction of the main piece 21a. The terminal piece 21d extended in the other direction of the thickness direction of 21a is provided. A main contact holding piece 21e extending substantially parallel to the first branch piece 21b and to which the main fixed contact 27 is fixed is extended at the tip of the first branch piece 21b, and further, at the tip of the second branch piece 21c. An arc contact holding piece 21f that is substantially parallel to the main contact holding piece 21e and to which the arc fixed contact 28 is fixed is provided.

  A screw hole 21g is formed at the center of the terminal piece 21d, and a terminal screw 21h with a washer is screwed into the screw hole 21g. An extension piece 21i is provided on the peripheral edge of the main contact holding piece 21e opposite to the peripheral edge where the first branch piece 21b continues in the extending direction of the first branch piece 21b. A suction yoke 29 made of a body is fixed. The suction yoke 29 has a central piece placed on the same side as the main fixed contact 27 in the thickness direction of the main contact holding piece 21e, and a pair of leg pieces from both ends in the width direction of the first branch piece 21b in the central piece. Is formed in a U-shaped cross section.

The movable side terminal plates 22A and 22B have a main piece 22a disposed so that the thickness direction is substantially orthogonal to the main piece 21a of the fixed side terminal plates 21A and 21B and the extension direction is substantially coincident with the main piece 22a. A first branch piece 22b extends from one end of the main piece 22a in a direction substantially orthogonal to the extending direction of the main piece 22a, and from the other end of the main piece 22a to the first branch piece 22b. A second branch piece 22c that extends in parallel is extended, and a third branch piece 22d is formed in a direction opposite to the first branch piece 22b and the second branch piece 22c from the side edge in the middle portion of the main piece 22a in the longitudinal direction. It is extended. The first branch piece 22b is formed to be longer than the second branch piece 22c. A terminal piece 22e that is substantially parallel to the third branch piece 22d and whose thickness direction is substantially orthogonal to the third branch piece 22d is provided at the tip of the third branch piece 22d. A spring holding piece 22f, which is substantially parallel to the extending direction of the first branch piece 22b and substantially perpendicular to the thickness direction, and one end portion in the longitudinal direction of the main contact spring 23 is caulked and fixed to the tip of the first branch piece 22b. Furthermore, a spring holding piece 22g is provided at the tip of the second branch piece 22c, which is substantially parallel to the spring holding piece 22f and to which one end in the longitudinal direction of the arc contact spring 24 is caulked and fixed.

  The main contact spring 23 is arranged so that the other end approaches the main piece 22a with respect to the one end fixed to the spring holding piece 22f, and the arc contact spring 24 corresponds to the one end fixed to the spring holding piece 22g. The other end is arranged so as to approach the main piece 22a. A conductive plate 23 a is laminated on the middle portion of the main contact spring 23 in the longitudinal direction, and the conductive plate 23 a is fixed to the main contact spring 23 at the same time when the main movable contact 25 is caulked and fixed to the main contact spring 23. A screw hole 22h is formed at the center of the terminal piece 22e, and a terminal screw 22i with a washer is screwed into the screw hole 22h.

  Here, the fixed terminal plate 21A and the fixed terminal plate 21B are formed in substantially the same shape, but are formed symmetrically with respect to the symmetry plane parallel to the second branch piece 21c. The relationship between the movable side terminal plate 22A and the movable side terminal plate 22B is the same, and is formed symmetrically with respect to the symmetry plane parallel to the main piece 22a.

  The fixed side terminal plates 21A and 21B and the movable side terminal plates 22A and 22B are attached with a main contact spring 23, an arc contact spring 24, a main movable contact 25, an arc movable contact 26, a main fixed contact 27, an arc fixed contact 28, and the like. It is stored in the container 1 in the state where In the body 11, as shown in FIG. 3, the movable side terminal plate 22A is disposed between the side plate 11a and the fixed side terminal plate 21A. On the other hand, in the intermediate body 12, as shown in FIG. 4, the fixed terminal plate 21B is disposed between the intermediate plate 12a and the movable terminal plate 22B. Accordingly, the fixed terminal plate 21A and the movable terminal plate 22A intersect three-dimensionally in the body 11, and the fixed terminal plate 21B and the movable terminal plate 22B intersect three-dimensionally in the intermediate body 12. . With the above-described configuration, the main contact devices 2A and 2B and the arc contact devices 3A and 3B are electrically connected by the fixed terminal plates 21A and 21B and the movable terminal plates 22A and 22B. There is no need to use a separate member for the electrical connection between the arc contact device 3A and the arc contact device 3B, and the number of components is reduced.

  By the way, the arc contact holding piece 21f to which the arc fixed contact 28 is fixed and the spring holding piece 22g to which one end of the arc contact spring 24 is fixed are non-parallel, and the arc fixed contact 28 in the arc contact holding piece 21f. And an angle formed by an extension line between the surface on which the arc contact spring 24 is fixed in the spring holding piece 22g is arranged to be 180 degrees or less. As shown in FIG. 5A, when the arc contact holding piece 21f and the spring holding piece 22g are parallel to each other, the arc movable contact 26 can come off from the vicinity of the central portion of the arc fixed contact 28 and contact at the peripheral portion. In such a contact state, the impact force at the time of contact is concentrated on a part, so that bounce is likely to occur, and the arc movable contact 26 and the arc fixed contact 28 are consumed unevenly. The lifetime of the devices 3A and 3B is shortened.

  On the other hand, in this embodiment, as shown in FIG. 5B, the arc contact holding piece 21f is arranged so as to be substantially parallel to one outer peripheral wall 11b of the container 1, and the spring holding piece 22g is an arc contact. It arrange | positions so that it may incline with respect to the holding piece 21f. In this configuration, when the arc fixed contact 28 is caulked and fixed to the arc contact holding piece 21f in a state where the other portions of the fixed side terminal plates 21A and 21B are positioned, the positioning direction coincides with the caulking direction or Since they are orthogonal to each other, the structure of the assembling apparatus that performs the caulking operation of the arc fixed contact 28 is simplified. However, as shown in FIG. 5C, the spring holding piece 22g is arranged so as to be substantially parallel to one outer peripheral wall 11b of the vessel 1, and the arc contact holding piece 21f is inclined with respect to the spring holding piece 22g. You may arrange in. 5B and 5C, the arc movable contact 26 contacts near the center of the arc fixed contact 28, so that the bounce is suppressed, and the arc movable contact 26 and the arc Since the fixed contacts 28 are consumed evenly, the life of the arc contact devices 3A and 3B is extended.

  Although the arc contact devices 3A and 3B have been described in the above example, the same configuration may be adopted for the main contact devices 2A and 2B. However, the arc contact devices 3A and 3B receive a pressing force from the armature block 7 between the fixed end of the arc contact spring 24 and the arc movable contact 26, while the main contact devices 2A and 2B have a main contact spring 23. Since the force from the armature block 7 acts on the free end of the main contact device 2 and the contact position of the main movable contact 25 with respect to the main fixed contact 27 is difficult to shift, in this embodiment, the main contact devices 2A and 2B are configured as described above. Is not adopted.

  A space surrounded by the side plate 11a and the outer peripheral wall 11b in the body 11 is divided into four sections by the partition wall 11g, and a space surrounded by the intermediate plate 12a and the outer peripheral wall 12b in the intermediate body 12 is divided into four sections by the partition wall 12g. . Two of the sections of the body 11 and the intermediate body 12 are independent of each other between the body 11 and the intermediate body 12, and the remaining two sections communicate with each other through a through hole 12 c provided in the intermediate body 12.

  In one of the two independent sections, a main contact holding piece 21e and a first branch piece 21b to which a main fixed contact 27 is fixed and a spring holding piece 22f and a first branch piece 22b to which a main contact spring 23 is fixed are stored. The other of the two independent sections accommodates the arc contact holding piece 21f and the second branch piece 21c to which the arc fixed contact 28 is fixed, and the spring holding piece 22g and the second branch piece 22c to which the arc contact spring 24 is fixed. Is done. These two sections are sections that communicate the internal space of the body 11 and the intermediate body 12 at the center of the intermediate body 12 and sandwich the section in which the electromagnet device 5 is housed. In addition, the section that houses the main contact spring 23 and the main fixed contact 27 is larger in dimension in the extending direction of the main contact spring 23 than the section that houses the arc contact spring 24 and the arc fixed contact 28. Therefore, the main contact spring 23 can be formed longer than the arc contact spring 24.

  As described above, in the container 1, a section for storing the main contact devices 2 </ b> A and 2 </ b> B and a section for storing the arc contact devices 3 </ b> A and 3 </ b> B are provided across the section for storing the electromagnet device 5. Thus, the distance between the main contact devices 2A and 2B and the arc contact devices 3A and 3B can be made relatively large in a limited space in the vessel 1. Further, the partition wall 11g surrounding the compartment for storing the electromagnet device 5 is used not only for dividing the compartment but also for fixing the position of the electromagnet device 5, so that there is no need to separately provide a member for fixing the position of the electromagnet device 5. It will be easy. That is, the amount of the partition wall 11g formed inside the container body 1 can be relatively reduced.

  As shown in FIGS. 3 and 4, each of the outer peripheral wall 11b of the body 11 and the outer peripheral wall 12b of the intermediate body 12 and adjacent to two independent sections includes the body 11 and the intermediate body 12. Two terminal blocks 10a and 10b are formed. Each of the terminal blocks 10a and 10b includes a receiving groove 10c on which the terminal pieces 21d and 22e can be placed and into which the leg portions of the terminal screws 21h and 22i are inserted. The receiving grooves 10c of the terminal blocks 10a and 10b provided on the body 11 are open to the surface facing the intermediate body 12, and the receiving grooves 10c of the terminal blocks 10a and 10b provided to the intermediate body 12 are open to the surface facing the cover 13. Has been.

  The remaining section in which the internal space between the body 11 and the intermediate body 12 communicates through the through hole 12 c of the intermediate body 12 is provided adjacent to the section that stores the arc contact spring 24 in the extending direction of the main contact spring 23. The auxiliary contact device 4 is accommodated in this section. In other words, the main contact spring 23 is extended in the direction in which the arc contact devices 3A and 3B and the auxiliary contact device 4 are arranged. The auxiliary contact device 4 opens and closes in conjunction with the main contact devices 2A and 2B and the arc contact devices 3A and 3B, informs other devices of the open / closed state of the power feeding path to the load, and the operation state of the electromagnet device 5 externally. Used to retrieve as output. As is clear from the above description, the high electrical systems such as the main contact devices 2A and 2B and the arc contact devices 3A and 3B and the weak electrical systems such as the auxiliary contact device 4 and the electromagnet device 5 are separated by the partition wall 11g. Can do.

  As shown in FIG. 2, the auxiliary contact device 4 includes two auxiliary terminal plates 31 and 32 and an auxiliary contact spring 33 that is caulked and fixed to one auxiliary terminal plate 31. The auxiliary terminal plate 31 includes a main piece 31a disposed along the inner surface of the side plate 11a in the body 11, a spring holding piece 31b extended from a side edge of one end of the main piece 31a in a direction perpendicular to the side plate 11a, Two terminal pieces 31c and 31d formed by bifurcating from the other end of the main piece 31a are provided. The auxiliary terminal plate 32 includes a main piece 32a disposed along the inner surface of the side plate 11a in the body 11, and a contact piece 32b extending from a side edge of one end of the main piece 32a in a direction perpendicular to the side plate 11a. And a terminal piece 32c extending to the other end of the main piece 32a. The auxiliary contact spring 33 is a leaf spring and is formed in a shape having two independent springs by a slit groove extending from the vicinity of one end edge in the longitudinal direction to the other end edge. One end of the auxiliary contact spring 33 is fixed to the spring holding piece 31 b of the auxiliary terminal plate 31, and the other end of the auxiliary contact spring 33 is arranged to be detachable from the contact piece 32 b of the auxiliary terminal plate 32.

  As shown in FIGS. 3 and 6, the terminal pieces 31 c, 31 d, and 32 c are disposed in a coupling cylinder 10 d that penetrates the outer peripheral wall 11 b of the body 11 and projects from the outer surface of the container body 1. Each of the terminal pieces 31c, 31d, and 32c has a plate shape and is arranged on a straight line orthogonal to the thickness direction. That is, the terminal pieces 31, 31d, and 32c are arranged on one plane. The coupling cylinder 10d has an open surface (one end surface in the axial direction of the coupling cylinder 10d) parallel to one surface of the outer peripheral wall 11b of the body 11 from which the terminal pieces 31c, 31d, and 32c project. That is, it has an opening surface orthogonal to the extending direction of the terminal pieces 31c, 31d, and 32c. Further, the connecting cylinder 10d protrudes from the outer side surface of the outer peripheral wall 11b of the body 11 and protrudes from the outer side surface of the outer peripheral wall 12b of the intermediate body 12 and the receiving cylinder part 11h having a U-shaped cross section opened on one side surface. And a covering piece 12h that covers the one side surface of the receiving cylinder portion 11h. On the outer peripheral wall 11b of the body 11 which is the other end surface in the axial direction of the coupling cylinder 10d, a surface (upper surface in FIG. 2) that abuts the intermediate body 12 in the body 11 is opened, and terminal pieces 31c, 31d, and 32c are mounted, respectively. A holding groove 11i is formed. Therefore, the auxiliary terminal plates 31 and 32 can be attached to the body 11 from the surface of the body 11 that faces the intermediate body 12. In the coupling cylinder 10d, terminal pieces 44c and 44d provided in the electromagnet device 5 described later are also arranged. The terminal pieces 44c, 44d are plate-like and are arranged on the same plane as the terminal pieces 31c, 31d, 32c. Therefore, the five terminal pieces 31c, 31d, 32c, 44c, and 44d are arranged in a straight line in the coupling cylinder 10d.

  A plurality of holding ribs 11j and 12j are formed on appropriate portions of the inner surface of the side plate 11a of the body 11 and the surface of the intermediate plate 12a of the intermediate body 12 facing the cover 13, and the fixed side terminal plates 21A and 21B are movable. The terminal plates 22A and 22B and the auxiliary terminal plates 31 and 32 are fixed to the body 11 and the intermediate body 12 by attaching a part of them to the holding ribs 11j and 12j, respectively. The main contact spring 23 is a flexure type, the main movable contact 25 and the main fixed contact 27 constitute a normally open contact, and the arc contact spring 24 is a lift-off type, and the arc movable contact 26 and the arc fixed contact. 28 constitutes a normally closed contact. Further, a spring holding piece 22f to which the main contact spring 23 is fixed and a spring holding piece 22g to which the arc contact spring 24 is fixed are positioned on the side plate 10a of the body 11 and the intermediate plate 12a of the intermediate body 12. Guide ribs 11k and 12k are formed, and the guide ribs 11k and 12k are formed in shapes that hold the spring holding pieces 22f and 22g in the grooves, respectively. By providing the guide ribs 11k and 12k and positioning the spring holding pieces 22f and 22g as described above, the arc movable contact 26 and the arc fixed contact 28 are not affected by variations in the dimensions of the movable side terminal plates 22A and 22B. Misalignment can be prevented.

  Next, the electromagnet device 5 will be described. As shown in FIG. 2, the electromagnet device 5 includes a coil block 6 having a coil (not shown) and an armature block 7 that is pivotally attached to the coil block 6 and reciprocates between two specified positions. . As shown in FIG. 1, the coil block 6 includes a coil bobbin 41 which is a synthetic resin molded product, an iron core 42 made of a magnetic material partially inserted into the coil bobbin 41, and one end portion in the longitudinal direction of the iron core 42. And a yoke 43 made of a magnetic material that is mechanically and magnetically coupled. The armature block 7 includes a movable frame 51 which is a molded product of synthetic resin (for example, polybutylene terephthalate), two magnetic pole plates 54a and 54b held by the movable frame 51, and both magnetic pole plates 54a and 54b. And a permanent magnet 55 which is disposed between the magnet plates 54a and 54b and magnetizes the magnetic pole plates 54a and 54b to different magnetic poles.

  The coil bobbin 41 has a rectangular tube-shaped shaft portion 41a around which a coil is wound, and is formed in a shape in which flange portions 41b and 41c are provided continuously and integrally at each end in the longitudinal direction of the shaft portion 41a. Two coil terminals 44a and 44b are inserted through one flange 41b. Each coil terminal 44a, 44b is L-shaped, the terminal end of the coil is connected to the tip of one piece inserted through the flange 41b, and the other piece is a terminal piece 44c arranged in the coupling cylinder 10d described above. 44d.

  The iron core 42 includes a leg piece 42a inserted through the coil bobbin 41 along the longitudinal direction of the shaft portion 41a, and a magnetic pole piece 42b that is continuous with one end portion in the longitudinal direction of the leg piece 42a and is wider than the leg piece 42a. Further, a coupling piece 42c projects from the other end edge in the longitudinal direction of the leg piece 42a. The magnetic pole piece 42b and the coupling piece 42c protrude from each end of the coil bobbin 41, respectively.

  By the way, the iron core 42 is formed by punching by a shearing process, and the front and back are generated in the thickness direction depending on the punching direction. As will be described later, since the armature block 7 is moved by the magnetic force between the magnetic pole piece 42b provided on the iron core 42, if the front and back surfaces of the iron core 42 vary for each product, the operation characteristics vary. Therefore, as shown in FIG. 7, the iron core 42 has a center line L1 along the axial direction of the coil bobbin 41 at the center in the width direction of the leg piece 42a and an axial direction of the coil bobbin 41 at the center in the width direction of the magnetic pole piece 42b. Is formed in a shape that does not coincide with the center line L2 along the line. In short, it is formed in an asymmetric shape in the vertical direction of FIG. Therefore, in FIG. 7, the distance d1 from the upper edge of the leg piece 42a to the upper edge of the magnetic pole piece 42b is different from the distance d2 from the lower edge of the leg piece 42a to the lower edge of the magnetic pole piece 42b.

  On the other hand, as shown in FIG. 8, the coil bobbin 41 has a fitting groove 41f into which a part of the magnetic pole piece 42b is fitted on the outer surface of the flange portion 41c. The fitting groove 41f is formed so that the magnetic pole piece 42b is formed only when the front and back directions in the thickness direction of the iron core 42 are correct with respect to the coil bobbin 41 when the leg piece 42a of the iron core 42 is inserted into the coil bobbin 41. It is formed to fit. That is, the upper and lower center positions in FIG. 8 of the fitting groove 41f are shifted from the axial center line of the hole into which the leg piece 42a of the iron core 42 is inserted. Therefore, when the front and back of the iron core 42 are not correct with respect to the coil bobbin 41, the magnetic pole piece 42b cannot be fitted into the fitting groove 41f, and as a result, the reverse assembly of the iron core 42 with respect to the coil bobbin 41 is prevented. can do. In the coil bobbin 41 shown in FIG. 8, the iron core 42 can be attached when the upper limit of the iron core 42 shown in FIG. 7 is reversed. Thus, by preventing reverse assembly of the iron cores 42 with the front and back sides, it is possible to suppress variations in operating characteristics (driving force of the amateur block 7) for each product.

  The yoke 43 is formed in a U-shape comprising a pair of leg pieces 43a and 43b facing each other and a central piece 43c that continues between one end in the longitudinal direction of both leg pieces 43a and 43b. An insertion hole 43d into which the coupling piece 42c of the iron core 42 is inserted opens at the center of the central piece 43c. After the coupling piece 42c is inserted into the insertion hole 43d, the coupling piece 42c is caulked, thereby The yoke 43 is mechanically coupled. The tip portions of the leg pieces 43a and 43b of the yoke 43 are extended to a portion facing the magnetic pole piece 42b of the iron core 42 (see FIG. 2), and the tip portions of the leg pieces 43a and 43b are arranged in the width direction. Attachment pieces 43e are provided on both sides. In addition, a mounting groove 43f is formed at the base of the mounting piece 43e. The mounting groove 43f is cut from the distal end side of the leg pieces 43a and 43b along the longitudinal direction of the leg pieces 43a and 43b.

  Auxiliary yokes 45 facing the magnetic pole pieces 42b provided on the iron core 42 are mounted on the tip portions of the leg pieces 43a and 43b of the yoke 43, respectively. The auxiliary yoke 45 is U-shaped, and holding grooves 45 a that are fitted to both side portions of the leg pieces 43 a and 43 b of the yoke 43 in the width direction are formed on the inner side surface of the auxiliary yoke 45. That is, the holding grooves 45a of the auxiliary yoke 45 are aligned with both side portions of the leg pieces 43a and 43b of the yoke 43, and the auxiliary yoke 45 is slid and inserted from the tips of the leg pieces 43a and 43b of the yoke 43. An auxiliary yoke 45 can be attached.

  The auxiliary yoke 45 abuts on the flange 41c of the coil bobbin 41, and a part of the auxiliary yoke 45 is inserted into the mounting groove 43f, whereby the position of the leg piece of the yoke 43 in the longitudinal direction is determined. As shown in FIG. 9, a fixed projection 43g is provided on the inner peripheral surface of the mounting groove 43f. After the auxiliary yoke 45 is inserted into the mounting groove 43f, the yoke 43 is caulked at a portion corresponding to the mounting groove 43f. (That is, when the yoke 43 is plastically deformed so as to reduce the width dimension of the mounting groove 43f), the fixed projection 43g bites into the auxiliary yoke 45, and the auxiliary yoke 45 is fixed to the yoke 43. Here, by inserting the auxiliary yoke 45 into the mounting groove 43f, the auxiliary yoke 45 is positioned in the extending direction of the leg pieces 43a and 43b of the yoke 43, and the auxiliary yoke 45 is caulked and fixed to the yoke 43. Since no adhesive is required, it is possible to prevent the occurrence of malfunction due to the adhesive adhering to unnecessary portions. In addition, since the yoke 43 is in close contact with the auxiliary yoke 45, the magnetic resistance between the yoke 43 and the auxiliary yoke 45 is reduced.

  Here, the auxiliary yoke 43 is arranged so as to protrude to the opposing surface side of both leg pieces 43 a and 43 b of the yoke 43. Therefore, the gap of the gap formed between the leg pieces 43 a and 43 b of the yoke 43 and the magnetic pole piece 42 b of the iron core 42 is smaller than that of the gap formed between the auxiliary yoke 45 and the magnetic pole piece 42 b of the iron core 42. The interval can be reduced. That is, the electromagnet device 5 having different specifications can be provided by changing the presence or absence of the auxiliary yoke 45 or the shape of the auxiliary yoke 45.

  In order to facilitate positioning of the auxiliary yoke 45 in the extending direction of the leg pieces 43a and 43b of the yoke 43 and to improve the positional accuracy of the auxiliary yoke 45, the auxiliary yoke 45 abuts on one of the flange portions 41c of the coil bobbin 41. Two positioning grooves 41e (see also FIG. 8) into which a part of each auxiliary yoke 45 is inserted are recessed in the surface. The positioning groove 41e is formed in a U shape so as to match the cross-sectional shape of the auxiliary yoke 45. When the auxiliary yoke 45 is mounted on the yoke 43 with the iron core 42 and the yoke 43 attached to the coil bobbin 41, a part of the auxiliary yoke 45 is positioned by being inserted into the positioning groove 41e of the coil bobbin 41. Therefore, the dispersion | variation for every product is suppressed about the position which crimps the yoke 43 with respect to the auxiliary yoke 45. FIG.

  As a structure for fixing the auxiliary yoke 45 to the yoke 43, as shown in FIG. 10, instead of forming the mounting groove 43f in the yoke 43, both end faces in the width direction of the yoke 43 and the inner surface of the holding groove 45a of the auxiliary yoke 45 are provided. A fitting protrusion 43h may be provided on one of the two, and a fitting recess 45b in which the fitting protrusion is fitted may be provided on the other (in the illustrated example, the fitting protrusion 43h may be provided on the yoke and fitted. The recess 45b is provided in the auxiliary yoke 45, but the reverse relationship may be used). In this configuration, when the auxiliary yoke 45 is attached to the yoke 43, the auxiliary projection 45h is fitted into the fitting recess 45b so that the auxiliary yoke 45 is fixed to the yoke 43, so that the caulking work is unnecessary. , Leading to reduced man-hours.

  Axial pins 41d are continuously and integrally provided on both surfaces of the peripheral surface of the flange 41b of the coil bobbin 41 in the direction in which the coil terminals 44a and 44b are inserted. The movable frame 51 is pivotally attached to the coil bobbin 41 by inserting the two shaft pins 41 d into the shaft holes 51 d provided in the movable frame 51.

  The movable frame 51 has a rectangular frame-shaped main body frame portion 51a and side frame plates 51b that extend from two opposite sides of the main body frame portion 51a and face each other. A U-shaped auxiliary frame portion 51c that continuously and integrally connects the frame plates 51b is provided. That is, the auxiliary frame portion 51c is formed in a shape in which the tip portions of two arms respectively extending from the both side frame plates 51b are integrally connected by the bridge. Further, the main card portion 52 and the arc card portion 53 are extended from the remaining two sides of the main body frame portion 51a toward the side opposite to the side frame plate 51b. Further, an operation piece 51e having an arc-shaped cross section extends from the auxiliary frame portion 51c, and an operation projection 51f projects from one surface of the operation piece 51e. The operation protrusion 51f is exposed to the outside of the body 1 through the operation hole 11c opened in the outer peripheral wall 11b of the body 11. If the operation protrusion 51f is operated with an appropriate tool such as a minus driver or a finger, the movable frame 51 can be manually rotated around the shaft pin 41d. Here, since the auxiliary frame portion 51c is formed in a U-shape, the strength is high, and an external force that acts on the operation piece 51e for manual operation is transmitted to the side frame plate 51b without loss. That is, no bending occurs between the operation piece 51e and the side plate 51b, and a good operation feeling in which the operation feeling and the movement of the armature block 7 coincide with each other is obtained. The operation hole 11c is a portion of the outer peripheral wall 11b of the body 11 that surrounds a section that houses the auxiliary contact device 4, and is an inner peripheral wall of a recess 11f provided on one surface different from the one surface on which the terminal pieces 31c, 31d, and 32c protrude. Open to. That is, the operation protrusion 51f is disposed in the recess 11f, thereby preventing inadvertent operation.

  A shaft hole 51d into which the shaft pin 41d is inserted is provided at each end of the side frame plate 51b away from the main body frame 51a. Therefore, the coil bobbin 41 is disposed between the both side frame plates 51b, and the movable frame 51 can be rotated around the shaft pin 41d in a state where the two shaft pins 41d protruding from the coil bobbin 41 are inserted into the respective shaft holes 51d. become. As described above, the armature block 7 moves with the two shaft pins 41d projecting in opposite directions from the flange portion 41b of the coil bobbin 41 as the center of rotation. Therefore, when the armature block 7 moves, the armature block 7 is inclined to the center of rotation. Does not occur, and the amateur block 7 can be moved smoothly.

  The magnetic pole plates 54a and 54b and the permanent magnet 55 are attached to the vicinity of the main body frame portion 51a in the both side frame plates 51b. That is, as shown in FIG. 11, the permanent magnet 55 is sandwiched between a part of both of the magnetic pole plates 54a and 54b, and the magnetic pole plates 54a and 54b are magnetized to different polarities by the permanent magnet 55. When the integrated object with the permanent magnet 55 is press-fitted into the opening of the main body frame portion 51a, both the magnetic pole plates 54a and 54b and the permanent magnet 55 are held between the both side frame plates 51b. A groove 51g for press-fitting and holding the magnetic pole plates 54a and 54b and the permanent magnet 55 is formed in the opening of the main body frame 51a and on the opposing surface of the both foot frame plates 51b. Therefore, the magnetic pole plates 54a and 54b and the permanent magnet can be fixed to the movable frame 51 without using an adhesive. Note that, on the opposing surfaces of the magnetic pole plates 54a and 54b, the sequential plates 56a and 56b are attached to facilitate separation of the two members that are in contact with each other by magnetic force.

  The magnetic pole plates 54a and 54b are inserted between the tip portions of the leg pieces 43a and 43b of the yoke 43 and the magnetic pole pieces 42b of the iron core 42, respectively. That is, one magnetic pole plate 54 a moves between the auxiliary yoke 45 provided on one leg piece 43 a of the yoke 43 and the magnetic pole piece 42 b of the iron core 42, and the other magnetic pole plate 54 b is the other leg piece of the yoke 43. It moves between the auxiliary yoke 45 provided on 43b and the magnetic pole piece 42b of the iron core 42. The distance between the two magnetic pole plates 54a and 54b is set equal to the distance between the auxiliary yoke 45 facing one surface of the magnetic pole piece 42b of the iron core 42 and each other surface of the magnetic pole piece 42b of the iron core 42. Therefore, if the coil terminals 44a, 44b are energized, the leg piece 43a of the yoke 43-auxiliary yoke 45-magnetic pole plate 54a-permanent magnet 55-magnetic pole plate 54b-iron core 42-yoke according to the direction of the current flowing through the coil. 43, a closed magnetic circuit of a path of a central piece 43c, and a closed magnetic circuit of a path of a leg piece 43b of the yoke 43, an auxiliary yoke 45, a magnetic pole plate 54b, a permanent magnet 55, a magnetic pole plate 54a, an iron core 42, and a central piece 43c of the yoke 43 And the movable frame 51 can be reciprocated around the shaft pin 41d.

  The main card portion 52 includes an extension portion 52a that protrudes from the main body frame portion 51a in the direction opposite to the side frame plate 51b, and a contact drive portion 52b that extends from the distal end portion of the extension portion 52a in a direction orthogonal to the extension portion 52a. It is formed in L shape provided with. That is, the extension part 52a is extended along the direction connecting the end of the movable frame 51 where the main body frame part 51a is provided and the shaft pin 41d. On both side edges in the width direction of the contact driving part 52b, driving grooves 52c are formed in which the front end parts of the main contact springs 23 fixed to the movable side terminal plates 22A and 22B are respectively inserted. On the other hand, the arc card portion 53 has an extension portion 53a that protrudes from the main body frame portion 51a in the direction opposite to the side frame plate 51b, and a contact drive that extends in the direction perpendicular to the extension portion 53a from the distal end portion of the extension portion 53a. It is formed in L shape provided with the part 53b. Two contact driving portions 53b are provided, and each contact driving portion 53b can press the intermediate portion of the arc contact spring 24 fixed to each movable terminal plate 22A, 22B.

The extension part 52a of the main card part 52 is longer than the extension part 53a of the arc card part 53, and the contact driving part 52b of the main card part 52 and the contact driving part 53b of the arc card part 53 are opposite to each other. Projected. Since the main contact spring 23 is a flexure type, the drive groove 52c presses the main contact spring 23 to bring the main movable contact 25 into contact with the main fixed contact 27, and the arc contact spring 24 is a lift-off type. The contact driving unit 53 b moves the arc movable contact 26 to the arc fixed contact 28 by moving away from the arc contact spring 23. Further, since the main contact spring 23 is inserted into the drive groove 52c, even if the main movable contact 25 is welded to the main fixed contact 27, if the degree of welding is slight, the driving force of the movable frame 51 is used as the main contact spring. 23 and can be pulled off. Further, if the width dimension of the drive groove 52c is larger than the thickness dimension of the main contact spring 23 to provide play, and the main movable contact 25 is slightly welded to the main fixed contact 27, the movable frame It is possible to remove the main contact spring 23 from 51 by applying an impact force. Moreover, the extension 52a of the main card 52 is made longer than the extension 53a of the arc card 53, and the main contact spring 23 is made longer than the arc contact spring 24. Since the main movable contact 25 is fixed to the main movable contact 25, a relatively large force can be applied to the main movable contact 25 from the movable frame 51 by the lever principle. Allows for removal during welding.

  Since the above-described extensions 52a and 53a are both plate-shaped, and the extension 52a conceals the main contact spring 23 from the arc contact devices 3A and 3B, the extension 52a is connected to the main contact devices 2A and 2B and the arc contacts. The creeping distance between the main contact devices 2A and 2B and the arc contact devices 3A and 3B is increased due to the function of separating the devices 3A and 3B, and the presence of the extensions 52a and 53a. That is, creeping discharge is prevented from occurring between the main contact devices 2A, 2B and the arc contact devices 3A, 3B, and the load is applied when the main contact devices 2A, 2B and the arc contact devices 3A, 3B are opened. The power supply path can be reliably cut off.

  The tip of the auxiliary contact spring 33 abuts on the auxiliary frame portion 51c. The auxiliary contact spring 33 is a flexure type, and when the movable frame 51 rotates around the shaft pin 41d, it is pressed by the auxiliary frame portion 51c and operates in the same direction as the main contact spring 23. That is, when the main movable contact 25 fixed to the main contact spring 23 contacts the main fixed contact 27, the auxiliary contact spring 33 contacts the contact piece 32 b of the auxiliary terminal plate 32, and the main movable contact 25 moves away from the main fixed contact 27. Then, the auxiliary contact spring 33 is also separated from the contact piece 32b of the auxiliary terminal plate 32. In other words, the open / close state of the auxiliary contact device 4 including the auxiliary terminal plates 31 and 32 and the auxiliary contact spring 33 is the same as the open / close state of the main contact devices 2A and 2B. Then, the operation state of the main contact devices 2A and 2B can be known.

  By the way, since the main contact spring 23 is a flexure type, if the main movable contact 25 is not welded to the main fixed contact 27, the drive groove 52c is brought into contact with the inner peripheral surface on the base side of the contact drive unit 52b. Kept. In other words, the main movable contact 25 comes into contact with the main fixed contact 27 following the movement of the movable frame 51. On the other hand, since the arc contact spring 24 is a lift-off type, if the dimension is set such that the tip of the contact driving portion 53b contacts the arc contact spring 24 after the main movable contact 25 is separated from the main fixed contact 27, the main contact is provided. The arc contact devices 3A and 3B operate so as to open after the devices 2A and 2B are opened. Under this condition, when the main contact devices 2A and 2B are closed, the arc contact devices 3A and 3B are closed first. That is, when the main contact devices 2A and 2B are closed, the arc contact devices 3A and 3B are closed first, and when the main contact devices 2A and 2B are opened, the arc contact devices 3A and 3B are opened later. By such an operation, opening and closing of the power supply path to the load is performed by the arc contact devices 3A and 3B, thereby making it difficult to cause welding due to the arc, and in the energized state of the load, the main connected to the arc contact devices 3A and 3B in parallel. By mainly energizing the contact devices 2A and 2B, it is possible to suppress a loss due to an increase in electrical resistance in the power feeding path.

  Further, when a large current flows through the main contact devices 2A and 2B due to a short circuit or the like in the power supply path to the load, there is a possibility of welding by arc when the main contact devices 2A and 2B are opened. In the present embodiment, an extension piece 21i extending so as to face the main contact spring 23 is provided on the main contact holding piece 21f of the fixed side terminal plates 21A and 21B, and the suction yoke 29 is fixed to the extension piece 21i. Therefore, when the magnetic flux generated around the main contact spring 23 passes through the suction yoke 29, a magnetic force acts so as to attract the main contact spring 23 to the extension piece 21i. Since this magnetic force increases as the current passing through the main contact devices 2A and 2B increases, when a large current such as a short-circuit current passes, a strong magnetic force acts in the direction of closing the main contact devices 2A and 2B. It is possible to prevent the devices 2A and 2B from opening.

  The above-described configuration example shows a double-cut electromagnetic relay in which one main contact device 2A, 2B is inserted into each of two wires serving as a power feeding path from the power source to the load. In some cases, a single-cut electromagnetic relay in which the main contact device 2A is inserted into only one of the two wires is required. As shown in FIG. 12, the single-cut electromagnetic relay can be realized by using a feed terminal plate 60 instead of the fixed side terminal plate 21B and the movable side terminal plate 22B as a member housed in the intermediate body 12. The feed terminal plate 60 includes terminal pieces 60a and 60b that are respectively placed on the terminal blocks 10a and 10b provided on the intermediate body 12, and one end portions of the terminal pieces 60a and 60b are bridged by a connecting piece 60c. It is formed. A screw hole 60d is formed at the center of each terminal piece 60a, 60b, and a terminal screw 60e with a washer is screwed into the screw hole 60d.

  When the intermediate body 12 shown in FIG. 12 is adopted, the electromagnet device 5 drives the main contact device 2A and the arc contact device 3A one by one, and therefore the main contact device 2B and the arc contact in the intermediate body 12. Nothing is arranged in the compartment for storing the device 3B, and the intermediate body 12 is used only for arranging the feed terminal plate 60, but the same intermediate body 12 can be used for both the two-sided die and the one-sided piece. Therefore, while providing two types of electromagnetic relays, an increase in the types of components can be suppressed by sharing the components.

  In the double-cut type, two main contact devices 2A and 2B and two arc contact devices 3A and 3B are driven by the armature block 7, whereas in the single-cut type, one main contact device 2 and 1 are driven. Since each arc contact device 3 is driven by the amateur block 7, the driving force required for the amateur block 7 is different. Therefore, the driving force of the amateur block 7 is adjusted by changing the volume of the permanent magnet 55. That is, the volume of the permanent magnet 55 used for the double-cut mold is made larger than the volume of the permanent magnet 55 used for the single-cut mold. That is, the double-cut type and the single-cut type can be handled by changing the permanent magnet 55 of the electromagnet device 5 without changing the specifications of the main contact spring 23 and the arc contact spring 24.

  The electromagnetic relay A described above is used by being attached to a relay connection base B as shown in FIG. The relay connection base B is housed and fixed in a panel C such as a control panel. Although the function of the relay connection base B is not a gist, it will not be described in detail, but the body 70 of the relay connection base B is a dimension of a distribution board internal unit (breaker or the like) standardized in the JIS standard (so-called distribution). It is formed in an L shape in a front view including a main body portion 71 having the same mounting dimensions as the electrical panel agreement dimensions) and a relay holding portion 72 that continuously and integrally protrudes from the side surface of the main body portion 71. In the illustrated example, the dimensions are set so that up to eight electromagnetic relays A can be attached to the relay holding portion 72.

  As is apparent from the shapes of the terminal pieces 31c, 31d, and 32c in the electromagnetic relay A, the terminal pieces 31c, 31d, 32c, 44c, and 44d are plug-in types. A connection port (not shown) in which contacts (not shown) for inserting the terminal pieces 31c, 31d, 32c, 44c, and 44d are formed is formed, and the coupling cylinder 10d is detachably attached to the connection port. . In the state where eight electromagnetic relays A are attached to the relay holding portion 72 as shown in the figure, the width is the unit size (the vertical width in the figure) of 10 unit dimensions in the distribution board agreement dimensions. In the distribution board agreement dimensions, if the width dimension in the horizontal direction in the figure is the same and the width dimension in the vertical direction is an integral multiple of the unit dimension, it can be installed as an internal device of the distribution board. By attaching to the relay connection base B, the electromagnetic relay A and the relay connection base B can be attached to the panel C using a member for attaching the internal device of the distribution board.

  Further, as shown in the figure, by disposing the body 11, the intermediate body 12, and the cover 13 so as to be stacked in the vertical direction, in each electromagnetic relay A, the main contact devices 2A, 2B and the arc contact devices 3A, 3B Are arranged in the horizontal direction, and the high-resistance consumable powder generated by opening and closing the arc contact devices 3A and 3B falls into the compartment containing the arc contact devices 3A and 3B, and the high-resistance consumable powder is the main contact. It can prevent adhering to apparatus 2A, 2B. As a result, the performance of the main contact devices 2A and 2B can be maintained over a long period of time, and a product with a long service life can be provided.

It is a disassembled perspective view of the principal part which shows embodiment of this invention. It is an exploded perspective view same as the above. It is a top view of the state which removed the intermediate body same as the above. It is a top view of the state which removed the cover same as the above. (A) is a principal part side view which shows the problem of an arc contact apparatus, (b) (c) is a principal part side view which shows the example of improvement of an arc contact apparatus. It is an external appearance perspective view same as the above. It is a perspective view which shows an example of the iron core used for the same as the above. It is a perspective view which shows an example of the coil bobbin used for the same as the above. It is a principal part exploded perspective view same as the above. It is a principal part disassembled perspective view which shows the other structural example same as the above. It is a principal part exploded perspective view same as the above. It is a disassembled perspective view of the principal part of the other structural example same as the above. It is a front view which shows the usage example same as the above. (A) (b) is a schematic block diagram which shows a prior art example.

Explanation of symbols

7 Amateur block 41 Coil bobbin 41a Shaft part 41b, 41c collar part 41d Shaft pin 41e Positioning groove 41f Fitting groove 42 Iron core 42b Magnetic pole piece 43 Yoke 43a, 43b Leg piece 43f Mounting groove 43g Fixed protrusion 43h Fitting protrusion 45 Auxiliary Yoke 45a Holding groove 45b Fitting recess 51a Main body frame portion 51b Side frame plate 51c Auxiliary frame portion 51d Shaft hole 51e Operation piece 54a, 54b Magnetic pole plate 55 Permanent magnet

Claims (8)

A coil bobbin including a shaft portion around which the coil is wound and a pair of flanges integrally provided at both ends of the shaft portion, a portion inserted through the shaft portion of the coil bobbin, and a direction of insertion of the portion into the shaft portion one of the iron core having at one end a pole piece which protrudes from one end of the coil bobbin is formed wider than the portion in the plane, is magnetically coupled to the other end of the iron core at the other end of the coil bobbin of the iron core and the other end a yoke having a leg which face each other with a gap on both sides in the thickness direction of the extension to the one end and magnetic iron core pole pieces from parts, between each leg of the pole piece and the yoke of the iron core An armature block having a pair of magnetic pole plates inserted therein and reciprocating between two specified positions by the magnetic force acting on the magnetic pole plate by energizing the coil, and the leg pieces of the yoke along the extending direction of the leg pieces It has a holding groove to be inserted, and slides on the leg of the yoke. Is allowed to relay electromagnet device, characterized in that it comprises an auxiliary yoke to reduce the spacing gap between the pole piece than the non-mounted state in the mounted state of a mountable to York.   A mounting groove into which a part of the auxiliary yoke is inserted is formed in the leg piece of the yoke, and the inner peripheral surface of the mounting groove is fixed so as to bite into the auxiliary yoke when the yoke is caulked at a portion corresponding to the mounting groove. The electromagnet device for relay according to claim 1, wherein the projecting portion is projected.   2. The electromagnet for relay according to claim 1, wherein a fitting projection is provided on one of the inner surface of the holding groove and the leg piece, and a fitting recess is provided on the other of which the fitting projection is fitted. apparatus. 4. A positioning groove for positioning the auxiliary yoke is formed in the flange on the one end side of the coil bobbin by inserting a part of the auxiliary yoke. The electromagnet device for a relay according to item 1.   The armature block includes two side frame plates sandwiching the coil bobbin, two shaft pins projecting from portions opposite to each other in the coil bobbin, and shaft pins are provided in shaft holes provided in the side frame plates. The relay electromagnet device according to any one of claims 1 to 4, wherein the armature block is pivotally attached to the coil bobbin by being inserted. The iron core has a center line along the axial direction of the coil bobbin at the center in the width direction of the magnetic pole piece, and a center line along the axial direction of the coil bobbin at the center in the width direction of the portion inserted through the coil bobbin. 6. The relay electromagnet according to claim 1, wherein the coil bobbin is formed with a fitting groove that fits with a part of the iron core pole piece. 7. apparatus.   The armature block includes a rectangular frame-shaped main body frame that holds the magnetic pole plate, and a permanent magnet that is sandwiched between the two magnetic pole plates and magnetizes each magnetic pole plate as a different magnetic pole and the two magnetic pole plates are located within the opening of the main body frame portion. The relay electromagnet device according to claim 1, wherein the relay electromagnet device is press-fitted and held in the relay.   The amateur block has an auxiliary frame portion in which the tip ends of two arms are integrally connected by a bridge, and an operation piece for moving the amateur block by manual operation is extended to the auxiliary frame portion. The relay electromagnet device according to claim 1, wherein the electromagnet device is a relay.

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