JP2012160398A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately comprehend the positional relationship between an electromagnet block attached to a base and a contact opening-closing part.SOLUTION: An electromagnetic relay includes: a base 1 made of a synthetic resin material, which has a first space part 7 and a second space part 8 communicated with each other via an operation hole 10 formed on a partition wall 9 and in which the first space part 7 is opened on one long side and the second space part 8 is opened on long side opposite to the first space part 7 and the opposed surface side of the partition wall 9; a contact mechanism part 2 which has a fixed contact terminal 52 and a movable contact terminal 53 disposed in the first space part 7 and in which a movable contact 58 of the movable contact terminal 53 is opposed to a fixed contact 55 provided at the fixed contact terminal 52 so as to be attachable to and detachable from the same; and an electromagnetic block 3 which is disposed in the second space part 8 and excited by energizing a coil 62 to rotate a movable iron piece 5 and then to drive the contact mechanism part 2 via the operation hole 10. The base 1 has windows 40, 41 on the side wall of either long side constituting the first space part 7 or the second space part 8.

Description

  The present invention relates to an electromagnetic relay.

  Conventionally, as an electromagnetic relay, a base is divided into an upper space portion and a lower space portion by a partition wall, each space portion is opened to a different side of the base, and an electromagnetic block is disposed in the upper space portion. It is well known that the contact mechanism is disposed in the lower space to improve the insulation performance of both members (see, for example, Patent Document 1).

  However, in the conventional electromagnetic relay, since the electromagnet block and the contact mechanism portion are respectively disposed in the space portions that open in different directions, the positional relationship between them cannot be grasped at a time. For this reason, it is assumed that the positional relationship between the two members may not be as designed, such as when the assembly work is not performed properly or when an impact force is applied during the assembly work. I can't.

JP-A-2005-293952

  This invention makes it a subject to provide the electromagnetic relay which can grasp | ascertain correctly the positional relationship of the electromagnet block assembled | attached to a base, and a contact switching part.

As a means for solving the above problems, the present invention provides:
Electromagnetic relay
It has a substantially rectangular parallelepiped shape, has a first space part and a second space part that are divided by a partition wall and communicated with each other by an operation hole formed in the partition wall, and one long side of the first space part is open. The second space part is made of a synthetic resin material having a long side opposite to the first space part and an opposite surface side of the partition wall open;
A contact mechanism having a fixed contact terminal and a movable contact terminal arranged in the first space, and the movable contact of the movable contact terminal is opposed to the fixed contact provided in the fixed contact terminal so as to be able to contact and separate; ,
The coil is wound around the iron core via a spool, arranged in the second space, excited by energizing the coil to rotate the movable iron piece, and the contact mechanism portion via the operation hole. An electromagnet block to be driven;
With
The base is configured to have a window portion on a side wall on either one of the long sides constituting the first space portion or the second space portion.

  With this configuration, it is possible to detect both the electromagnet block and the contact mechanism portion at one time through one space portion and the window portion. Thereby, it becomes possible to grasp | ascertain correctly the positional relationship of both members.

  It is preferable that the window portion is formed at two locations along the long side of the base.

  With this configuration, two positions of the electromagnet block or the contact mechanism portion can be detected from the two window portions, and the positions of the electromagnet block and the contact mechanism portion can be determined with high accuracy on the basis of the plane passing through the two window portions. It becomes possible to measure.

  It is preferable that a supporting protrusion that is visible from the window and on which the electromagnet block or the contact mechanism is placed is formed in the first space or the second space.

  With this configuration, it is possible to suppress the area in contact with the electromagnet block or the contact mechanism portion and set the supporting position with high accuracy.

  It is preferable that the base is formed with a projecting portion for sandwiching between the projecting portion and a component of the electromagnet block or the contact mechanism portion.

  With this configuration, it is possible to stabilize the assembly state of the electromagnet block or the contact mechanism portion.

  It is preferable that the supporting protrusion is constituted by a protrusion having a substantially arc-shaped cross section extending in the insertion direction of the electromagnet block or the contact mechanism.

  With this configuration, the support position of the electromagnet block or the contact mechanism unit can be set with high accuracy.

The electromagnet block includes a yoke that is crimped and fixed to one end of an iron core, extends to the other end along the wound coil, and rotatably supports the movable iron piece at the other end.
The supporting protrusion supports the yoke of the electromagnet block,
It is preferable that the supporting protrusions extend on the inner surface constituting the window portion.

  With this configuration, it is possible to obtain a stable assembled state to the base by supporting the yoke, which is a component having high rigidity among the components of the electromagnet block. Further, the position of the supporting protrusion can be easily detected by protruding the supporting protrusion into the window.

The fixed contact terminal includes a fixed terminal portion to which the fixed contact is fixed,
The movable contact terminal includes a movable terminal portion, and a contact piece portion extending from the movable terminal portion to which the movable contact is fixed,
The base has a fixed terminal mounting portion having a support protrusion on which the fixed terminal portion of the fixed contact terminal is placed in the first space portion, and a support on which the movable terminal portion of the movable contact terminal is placed. A movable terminal mounting portion having a projecting portion for,
It is preferable that the window portion is formed at a position where each of the supporting protrusions can be visually recognized, and the supporting protrusions extend on the inner surfaces of the window portions.

  With this configuration, it is possible to stabilize the assembled state of each contact terminal to the base, and it is possible to easily detect the position of the supporting protrusion by projecting it into the window.

The clamping protrusion has a press-fitting allowance that is scraped off when clamping the components of the electromagnet block or the contact mechanism.
It is preferable that the window portion can discharge the pressed-in synthetic resin material that has been cut off.

  With this configuration, resin powder remains inside by discharging the synthetic resin material scraped off from the sandwiching projection portion using the window portion while ensuring the accuracy of the position supported by the support projection portion. There is no adverse effect on the subsequent operation.

  According to the present invention, the first space portion and the second space portion that open in opposite directions are formed on the base, and the window portion is formed on the wall surface that constitutes one of the space portions. It is possible to detect both the electromagnet block and the contact mechanism. Therefore, the positions of both members can be detected with high accuracy.

It is a perspective view which shows the state which removed the case from the base of the electromagnetic relay which concerns on this embodiment. FIG. 2 is an exploded perspective view of FIG. 1. It is a disassembled perspective view which shows the state which looked at FIG. 2 from the other side. (A) is the perspective view of the base seen from the same side as FIG. 2, (b) is the perspective view of the base seen from the same side as FIG. It is a perspective view which shows the state which assembled | attached the contact mechanism part on the base of FIG. It is a front view which shows the state which assembled | attached components other than a case to the base of FIG. It is a perspective view of the electromagnet block of FIG. It is a disassembled perspective view of the electromagnet block of FIG. (A) is a perspective view of the card | curd of FIG. 2, (b) is a perspective view which shows the state which looked at the card | curd of (a) from the downward side.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the following description, terms indicating specific directions and positions (for example, terms including “up”, “down”, “side”, “end”) are used as necessary. Is for facilitating understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of these terms. Further, the following description is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(1. Overall configuration)
As shown in FIG. 1 to FIG. 3, the electromagnetic relay according to the present embodiment is generally configured such that a contact mechanism portion 2 and an electromagnet block 3 are attached to a base 1 and these are covered with a case 4. The driving force by the electromagnet block 3 is transmitted to the movable contact terminal 53 of the contact mechanism unit 2 through the movable iron piece 5 and the card 6.

(1-1. Base 1)
The base 1 is formed into a substantially rectangular parallelepiped shape by molding a synthetic resin material, as shown in FIGS. 2 and 3 and more specifically in FIGS. 4A and 4B (hereinafter, along the long side). The direction extending in the longitudinal direction will be described as the X axis, the direction extending in the short direction along the short side as the Y axis, and the direction extending in the height direction as the Z axis).

  The base 1 is divided into two in the Z-axis direction by a partition wall 9 formed on the XY plane, and a first space portion 7 (lower space portion) and a second space portion 8 (upper space portion) are formed. Has been. An operation hole 10 having a rectangular shape in plan view is formed in the partition wall 9, and the first space portion 7 and the second space portion 8 are communicated with each other.

  The first space portion 7 is surrounded by the bottom wall 11, both end walls (the first end wall 12 and the second end wall 13), and the side wall (first side wall 14), and opens only in one of the Y axes (Y ′ direction). is doing. The bottom wall 11 has a stepped shape in which the upper surface on one end (X direction) side is recessed compared to the upper surface on the other end (X ′ direction) side.

  An opening 14a is formed in the first side wall 14, and the electromagnet block 3 and the contact mechanism unit 2 in the second space 8 can be simultaneously viewed from the state shown in FIG. 4B. Further, guide grooves 14 b and 14 c extending in the Z-axis direction are formed on both end sides of the first side wall 14. A coil terminal holding portion 68 of the electromagnet block 3 to be described later is positioned in each guide groove 14b, 14c.

  In the first space portion 7, there are a fixed contact terminal mounting portion 15 located on one end side, a movable contact terminal mounting portion 16 located on the bottom surface on the other end side, and a card support portion 17 located on the upper surface on the other end side. Each is formed.

  The fixed contact terminal mounting portion 15 includes a first press-fit receiving portion 18 and a second press-fit receiving portion 19.

  The first press-fit receiving portion 18 includes a guide portion 20 formed by extending a ceiling wall 20b laterally from the upper end of an upright wall 20a extending upward (Z direction) from the bottom surface to have a substantially L shape in plan view. And a pair of protrusions (first protrusion 21 for terminals and second protrusion 22 for terminals) formed on a portion (bottom surface) facing the ceiling wall. The portion along the step on the bottom surface of the ceiling wall 20b and the terminal first protrusion 21 constitute the first auxiliary press-fit receiving portion 23, and the portion along the inner surface of the back side wall of the ceiling wall 20b and the terminal first The second ridge portion 22 constitutes a second auxiliary press-fit receiving portion 24.

  As shown in FIG. 6, the second press-fit receiving portion 19 is formed on a ceiling wall 19 a that protrudes inward along the first end wall 12 and extends in the X ′ direction, and a portion (bottom surface) facing the ceiling wall 19 a. It is comprised with the made protrusion part (3rd protrusion part 25 for terminals). The first end wall 12 is formed with a notch 26 at the boundary with the bottom wall 11 to avoid interference with the fixed contact terminal 52.

  As shown in FIG. 4A, the movable contact terminal mounting portion 16 includes a pedestal portion 27 that is one step higher from the bottom surface on the other end side. A guide wall 28 is formed on the pedestal 27 at the edge in the X direction. Further, on the upper surface of the pedestal portion 27, there are three ridges (a fourth ridge portion 29 for terminals, a fifth ridge portion 30 for terminals, and a sixth ridge portion 31 for terminals) extending in parallel with the Y axis. Is formed. The terminal fourth protrusion 29 and the terminal sixth protrusion 31 extend in parallel to the Y axis from the front edge of the pedestal 27 to the inner surface of the first side wall 14 on the back side. A ceiling wall 13a protruding from the inner surface of the second end wall 13 is located above the terminal fourth protruding portion 29, and the third auxiliary press-fit receiving portion 32 is configured by both. The fifth terminal protrusion 30 is located in a guide recess 33 having a rectangular shape in front view formed on the inner surface of the first side wall 14. A fourth auxiliary press-fit receiving portion 34 is constituted by the terminal fifth protrusion 30 and the ceiling surface of the guide recess 33.

  Each of the terminal protrusions 29, 30, and 31 is formed in an arc shape in cross section, and is in line contact with each of the terminal parts 53 and 55 of the contact mechanism part 2 described later. This line contact position is formed with high accuracy, and includes the first terminal protrusion 21 and the second terminal protrusion 22, and the terminal third protrusion 25 to the terminal fifth protrusion 30. Are located on the same XY plane. However, not only line contact but also a flat surface may be formed for surface contact. In addition, inclined surfaces 29 a, 30 a, and 31 a that gradually approach the bottom surface toward the tip are formed at the tip portions (Y ′ direction) of the terminal protrusions 29, 30, and 31, respectively. In addition, on the lower surfaces of the ceiling walls 20b, 19a, and 13a, inclined surfaces that are gradually separated from the bottom surface are formed in the tip portions (Y ′ direction) toward the tip. Therefore, when each terminal portion 53, 55 is inserted from the side of the base 1, each terminal portion 53, 55 is guided to the inclined surface and the lower surface of the ceiling walls 20b, 19a, 13a and the ridge portions 21, 22, It is clamped between the line (surface) contact positions of 25, 29, 30, 31.

  The card support portion 17 includes a bulging portion 35 provided on the lower surface of the partition wall 9 constituting the first space portion 7 and a support concave portion 36 having a substantially C-shaped cross section provided at the tip portion thereof. A support shaft 72 of the card 6 is rotatably supported by the support recess 36. The bulging portion 35 is formed with an inclined surface 36 a that reaches the support concave portion 36, and restricts the upward rotation range of the card 6.

  A mis-mounting preventing protrusion 37 protruding from the first side wall 14 is formed at a position between the card support portion 17 and the opening portion 14a to prevent the card 6 described later from being mounted in the wrong direction. . Further, a card receiving surface 38 that is lowered by one step is formed on the lower surface of the ceiling wall opposite to the card support portion 17 as shown in FIG.

  As shown in FIG. 4B, the second space 8 opens in the Y direction and the Z direction. On the upper surface of the partition wall 9 that divides the second space portion 8, a relief recess 39 for avoiding interference with the crimped portion of the leaf spring 66 of the yoke 65 that is continuous with the operation hole 10 in the X ′ direction. Is formed. In addition, the upper surface of the partition wall 9 escapes at a portion continuous in the X direction and the Y direction, and is further lower than the concave portion 39, so that interference with the movable iron piece 5 is avoided. An inclined surface 14d that is further inclined in the Z ′ direction is formed in a portion that continues in the Y direction.

  On the side wall (second side wall 40) constituting the second space 8, two window parts (first window part 41 and second window part 42) separated in the X-axis direction are formed. Each of the window portions 41 and 42 is a substantially rectangular hole extending in the Z direction from the same position as the upper surface of the partition wall 9. Each of the window portions 41 and 42 is disposed at a position where sufficient insulation between the coil 62 and the contact opening / closing portion can be secured. Specifically, the insulation distance is secured by the first guide piece 45 and the second guide piece 46 which will be described later on both ends of the wound coil 62. On the upper surface of the partition wall 9, protrusions extending in the Y and Y ′ directions (first electromagnet protrusions 43 and second electromagnet protrusions 44) at positions visible from the window portions 41 and 42. Are formed respectively. Each ridge 43, 44 has a cross-sectional arc shape like the ridge 21, 21, 25, 29, 30, 31, and the uppermost position thereof is located on the same horizontal plane. A bottom surface of a yoke 65 of an electromagnet block 3 to be described later is brought into contact with each protrusion 43 and 44, and the position of the yoke 65 can be visually recognized through the corresponding windows 41 and 42.

  A first guide piece 45 extending in the X-axis direction and projecting in the Y direction and a second guide piece 46 projecting further in the Y direction from the first guide piece 45 are formed on the inner surface of the second side wall 40. Yes.

  A first auxiliary guide 47 is formed on one end (X ′ direction) side of the first guide piece 45. On the lower surface of the first guide piece 45 on the other end (X direction) side, a third electromagnet ridge portion 48 is formed opposite to the electromagnet first ridge portion 43, and a first nipping that can clamp the yoke 65 is formed. Has become a department. The lower surface of the first guide piece 45 has an inclined surface 45a whose one end side is flush with the lower surface of the second guide piece 46 and whose protruding side edge on the other end side gradually inclines in the Z direction. It has become.

  On the lower surface of the second guide piece 46, a pair of fourth electromagnet projections 49 and a fifth electromagnet projection 50 extending in parallel with the Y-axis are hung on the lower surface of the first guide piece 45 at predetermined intervals. Each is formed. Each of the protrusions 49 and 50 has a circular arc shape in the same manner as described above, and an inclined surface is formed on the tip side, and the most protruding portion of the arc portion is a contact position (contact linear portion). ing. The fifth electromagnet ridge 50 faces the second electromagnet ridge 44 and constitutes a second clamping part capable of clamping the yoke 65. A second auxiliary guide 51 projects from the lower side of the second guide piece 46. The second auxiliary guide 51 is gradually inclined toward the inner surface of the second side wall 40 in the X direction.

  In addition, as shown in FIG. 4A, the bottom wall 11 of the base 1 is formed with notches 11a and 11b at two corners on the side where the first space portion 7 is opened. The leg portions of the contact terminal 52 and the movable contact terminal 53 are respectively arranged. Further, a groove portion 1a is formed on the outer surface of the first end wall 12, the first side wall 14, and the second end wall 13, so that the sealing agent can be prevented from entering when the base 4 is covered with the case 4 to seal the joint portion. It is preventing.

(1-2. Contact mechanism 2)
As shown in FIGS. 2 and 3, the contact mechanism unit 2 includes a fixed contact terminal 52 and a movable contact terminal 53. The fixed contact terminal 52 is obtained by crimping and fixing a fixed contact 55 to a fixed terminal portion 54. The movable contact terminal 53 is obtained by crimping and fixing one end side of the contact piece 57 to the movable terminal portion 56 and crimping and fixing the movable contact 58 to the other end side of the contact piece.

(1-3. Electromagnet block 3)
As shown in FIGS. 7 and 8, the electromagnet block 3 is obtained by winding a coil 62 around a body portion 61 of a spool 60 having flange portions 59 at both ends. An iron core 63 is press-fitted into the center hole 61 a of the body portion 61. In the iron core 63, a portion protruding from one end side of the spool 60 is a magnetic pole portion 64, and one end portion of a substantially L-shaped yoke 65 is caulked and fixed to a portion protruding from the other end side. A leaf spring 66 is fastened and fixed to the bottom surface of the other end side of the yoke 65. The leaf spring 66 is formed with a locking portion 67 by bending the tip portion. In addition, a coil terminal holding portion 68 is integrally formed in the flange portion 59, and coil terminals 69 are press-fitted therein. Both ends of the coil 62 are wound around the upper end of each coil terminal 69 and soldered.

(1-4. Movable iron piece 5)
The movable iron piece 5 is bent at an intermediate portion by pressing a magnetic plate material. One end side of the movable iron piece 5 is a sucked portion 5a that is attracted to the magnetic pole portion 64 of the iron core 63, and an opening 70 is formed from the bent portion toward the other end side, and a narrow pressing portion 71 is formed at the tip portion. Is formed. A plate spring 66 swaged and fixed to the yoke 65 is inserted into the opening 70, and a locking portion 67 of the plate spring 66 is locked, so that the movable iron piece 5 is attached to the electromagnet block 3. Yes. In this attached state, the movable iron piece 5 can be rotated with the lower edge on the other end side of the yoke 65 as a fulcrum.

(1-5. Card 6)
As shown in FIG. 9, the card 6 is a plate-like body having a substantially rectangular shape in plan view by molding a synthetic resin material.

  A support shaft 72 is formed at one end of the card 6. A shaft portion 73 having a large outer diameter is formed at two locations on the support shaft 72, and the shaft portion 73 is rotatably supported by the support recess 36 of the base 1. A projection 74 is formed at one end of the support shaft 72. The protrusion 74 is for preventing the card 6 from being erroneously attached to the base 1 upside down. That is, when the card 6 is mounted from the side of the base 1, the support shaft 72 cannot be inserted into the support recess 36 from the projection 74 side.

  A press receiving portion 75 is formed at the center of the upper surface of the card 6. The pressure receiving portion 75 has a substantially triangular shape that gradually protrudes upward from both side portions toward the central portion. The upper end portion of the pressure receiving portion 75 is formed in an arc shape (may have a flat surface) and can be pressed by the pressing portion 71 of the movable iron piece 5.

  A pressing protrusion 76 is formed on the lower surface of the card 6. The pressing ridge portion 76 extends from one side edge of the card 6 to the center portion toward the other side edge. A retaining protrusion 77 is formed on the lower surface of one side edge of the pressing protrusion 76. The retaining projection 77 has an inclined surface 77a that gradually protrudes from the side edge, guides the contact piece 57 of the movable contact terminal 53 in a state where the card 6 is mounted on the base 1, and is movable after mounting. The contact terminal 53 is prevented from moving sideways. A pressing protrusion 78 capable of pressing the center position of the contact piece 57 of the movable contact terminal 53 is formed on the lower surface of the central portion of the pressing protrusion 76.

  A cutout 6 a is formed on one side edge of the card 6. The notch 6a is for preventing the card 6 from being mounted in the wrong direction, like the protrusion 74. If the card 6 is inserted in the wrong direction, the side edge of the card 6 abuts against the base 37 for preventing erroneous mounting, and further insertion is impossible.

  The other end (free end) side of the card 6 is bent, and a relief bent portion 79 is formed that is displaced in a plane parallel to the plane portion on which the pressing protrusion 76 is formed. That is, when the card 6 is rotated until the upper surface of the card 6 abuts on the inclined surface 36a reaching the support recess 36, the position of the free end side is set to the upper side as compared with the case where the card 6 is simply flat. Can be positioned.

  Thereby, even if the separated position of the movable contact 58 of the movable contact terminal 53 (the initial position separated from the fixed contact 55) is sufficiently positioned upward, and the distance between the contacts is increased, the support shaft 72 of the card 6 is used. Interference between the movable contact terminal 53 and the card 6 can be avoided without changing the position. That is, it is possible to secure a sufficient distance between the contacts and to ensure the prescribed insulation. Further, since the card 6 is bent at the front end side with respect to the pressing protrusion 76, the pressing position and the pressing angle of the contact piece 57 of the movable contact terminal 53 by the pressing protrusion 78 are not affected by the bending. . That is, it can be pressed at an optimum position and angle as in the conventional case. Furthermore, when assembling the card 6 to the base 1, it is not necessary to greatly deform the contact piece 57 of the movable contact terminal 53, and the workability is excellent.

(2. Assembly method)
Then, the assembly method of the electromagnetic relay which consists of the said structure is demonstrated.

  First, the contact mechanism portion 2 is assembled in the first space portion 7 of the base 1 in the Y direction. That is, the fixed contact terminal 52 is press-fitted into the fixed contact terminal mounting portion 15 of the base 1. Further, the movable contact terminal 53 is press-fitted into the movable contact terminal mounting portion 16. In the press-fitting of these contact terminals 52 and 53, the inclined surfaces of the ceiling walls 20 b, 19 a and 13 a and the ridges 21, 22, 25, 29, 30 and 31 are formed on the inlet side of the contact terminal mounting portions 15 and 16. Since the inclined surfaces 21a, 22a, 25a, 29a, 30a, and 31a are formed, the contact terminals 52 and 53 can be smoothly inserted into the corresponding contact terminal mounting portions 15 and 16, respectively. When the contact terminals 52 and 53 are further pushed in, the fixed contact terminal 52 rides on the ridges 21, 22 and 25 and is supported on the lower surface, and then the ceiling walls 20 b and 19 a are pressed against the upper surface. . The movable contact terminal 53 rides on the ridges 29, 30, and 31 and is supported on the lower surface, and then the ceiling wall 13a is pressed against the upper surface.

  Thus, in each contact terminal 52, 52 attached to the base 1, first, the lower surface is supported by the ridges 21, 22, 25, 29, 30, 31, and then the upper surface is the ceiling walls 20b, 19a, 13a. Pressure contact. And even if the resin which comprises the base 1 is shaved by press injection, it becomes the ceiling walls 20b, 19a, 13a. Therefore, the support positions by the ridges 21, 22, 25, 29, 30, 31 are the reference positions.

  Next, the card 6 is assembled to the card support portion 17 of the base 1 from the side in the Y direction. The card 6 is performed by inserting the support shaft 72 into the support recess 36. At this time, if the card 6 is not inserted in the correct direction, the protrusion 74 abuts against the entrance portion of the support recess 36. Therefore, the assembling direction of the card 6 is not mistaken. When the card 6 is inserted in the correct direction, the retaining projection 77 formed on the lower surface of the card 6 comes into contact with the edge of the contact piece 57 of the movable contact terminal 53, and the contact piece 57 is gradually elastically deformed. The protrusion 77 of the retaining protrusion 77 is sufficiently large and has an inclined surface 77a so as to gradually increase. For this reason, the card | curd 6 can be assembled | attached smoothly, without the movable contact terminal 53 assembled | attached previously becoming an obstacle. Thereafter, the protrusion 77 for preventing the slip over the contact piece 57, the shape of the contact piece 57 is restored and comes into contact with the pressing protrusion 78. Further, the pressing portion 71 of the movable iron piece 5 abuts on the pressing receiving portion 75 of the card 6, and the movable iron piece 5 receives the urging force of the contact piece portion 57 of the movable contact terminal 53 via the card 6, and the sucked portion is It will be in the state spaced apart from the magnetic pole part 64 of the iron core 63. FIG.

  Further, the movable iron piece 5 is assembled to the pre-assembled electromagnet block 3 using the leaf spring 66. Then, the electromagnet block 3 and the movable iron piece 5 are assembled to the second space portion 8 of the base 1 in the Y ′ direction from the side. At this time, one side edge portion of the yoke 65 protrudes most by the inclined surfaces 48a, 49a, 50a of the third electromagnet protrusion 48, the electromagnet fourth protrusion 49, and the electromagnet fifth protrusion 50. After being guided to the contact position of the arc portion, it is press-fitted between the first electromagnet protrusion 43 and the electromagnet second protrusion 44 positioned on the upper side.

  In this way, in a state where the contact mechanism portion 2, the electromagnet block 3 and the card 6 are assembled to the base 1, the base 1 is viewed only from the contact mechanism portion 2 when viewed from the side where the first space portion 7 opens. In addition, the position of the yoke 65 of the electromagnet block 3 can also be confirmed through the first window portion 41 and the second window portion 42. That is, the positions of the contact mechanism unit 2 and the electromagnet block 3 that could not be confirmed at the same time can be confirmed simultaneously from the same direction. Therefore, the positional relationship between the contact mechanism unit 2 and the electromagnet block 3 can be accurately detected (measured), and the accuracy can be guaranteed if the positional relationship is appropriate. Otherwise, the correction is instructed or discarded. Etc., and appropriate measures can be taken. In some cases, the positional relationship between the contact mechanism portion 2 and the electromagnet block 3 is to confirm the electromagnet block 3 from the side where the second space portion 8 is opened, and confirm the contact mechanism portion 2 via the opening portion 14a. Is also possible.

  Finally, after covering the base 1 with the case 4, the assembly of the electromagnetic relay is completed by sealing the lower surface side of the base 1.

  The card 6 may be assembled after the electromagnet block 3 described later is assembled. In this case, the pressing receiving portion 75 and the pressing protrusion 76 of the card 6 have inclined surfaces, so that it is not necessary to bother and spread between the movable piece 5 and the contact piece portion 57 of the movable contact terminal 53. The card 1 can be easily assembled by simply pushing the card 6 into the base 1.

(3. Operation)
Next, the operation of the electromagnetic relay having the above configuration will be described.

  If the coil 62 is not energized and the electromagnet block 3 is in a demagnetized state, the movable iron piece 5 is urged through the card 6 pushed up by the elastic force of the contact piece portion 57 of the movable contact terminal 53. Therefore, the movable iron piece 5 is maintained in a state where the attracted portion is separated from the magnetic pole portion 64 of the iron core 63. As a result, the movable contact 58 of the movable contact terminal 53 is kept away from the fixed contact 55 of the fixed contact terminal 52.

  When the coil 62 is energized and the electromagnet block 3 is excited, the attracted portion 5a of the movable iron piece 5 is attracted to the magnetic pole portion 64 of the iron core 63, and the movable iron piece 5 rotates. As the movable iron piece 5 rotates, the pressing portion 71 presses the pressing receiving portion 75 of the card 6 and the card 6 is pushed down. The card 6 rotates around the support shaft 72 supported by the support recess 36, and the contact piece 57 of the movable contact terminal 53 is elastically deformed by the pressing projection 78. As a result, the movable contact 58 is closed to the fixed contact 55.

  The position and angle of the contact piece 57 pressed by the pressing protrusion 78 are set to a position and angle suitable for elastically deforming the contact piece 57. That is, the pressing position is such that the moving dimension of the pressing projection 78 can be closed to the fixed contact 55 with the desired pressure by the rotation of the card 6 accompanying the rotation of the movable iron piece 5. Is set to the correct position. Further, the angle formed between the pressing projection 78 extending perpendicularly downward from the lower surface of the card 6 positioned in the horizontal position and the contact piece 57 changes greatly when the contact piece 57 is deformed. It is set to an angle that will never be.

  When the energization of the coil 62 is interrupted and the electromagnet block 3 is demagnetized, the magnetic force attracting the attracted portion of the movable iron piece 5 by the magnetic pole portion 64 of the iron core 63 disappears. As a result, the card 6 pushed down by the movable iron piece 5 becomes movable, the contact piece 57 returns to its original shape by the elastic force, and the movable contact 58 is released from the fixed contact 55.

(4. Other embodiments)
In addition, this invention is not limited to the structure described in the said embodiment, A various change is possible.

  In the above embodiment, the window portions are provided at two locations, but may be provided at one location. Further, although the window portion is provided on the second side wall 40, it can also be provided on the first side wall 14. In short, the window part for confirming the electromagnet block 3 and the contact mechanism part 2 simultaneously from one direction should just be formed.

  In the above embodiment, the yoke 65 of the electromagnet block 3 is press-fitted into the second space 8 of the base 1, but it is possible that parts other than the yoke 65 can be press-fitted. For example, a part of the spool 60 of the electromagnet block 3 (such as a press-fitting part formed by extending a part of the flange part 59) may be press-fitted.

  In the above-described embodiment, the base 1 is formed with a plurality of protrusions having an arcuate cross section extending from one end side to the other end side. However, the base 1 is not limited to the protrusions, and may be composed of a plurality of protrusions. It is. In short, any structure that can obtain a reference position for supporting the contact mechanism portion 2 and the electromagnet block 3 may be used.

DESCRIPTION OF SYMBOLS 1 ... Base 1a ... Groove part 2 ... Contact mechanism part 3 ... Electromagnet block 4 ... Case 5 ... Movable iron piece 5a ... Suction part 6 ... Card 6a ... Notch part 7 ... 1st space part 8 ... 2nd space part 9 ... Partition wall DESCRIPTION OF SYMBOLS 10 ... Operation hole 11 ... Bottom wall 11a ... Notch 12 ... 1st end wall 13 ... 2nd end wall 13a ... Ceiling wall 14 ... 1st side wall 14a ... Opening part 14b, 14c ... Guide groove 14d ... Inclined surface 15 ... Fixed contact Terminal mounting part 16 ... Moving contact terminal mounting part 17 ... Card support part 18 ... First press-fitting receiving part 19 ... Second press-fitting receiving part 19a ... Ceiling wall 20 ... Guide part 20a ... Standing wall 20b ... Ceiling wall 21 ... No. DESCRIPTION OF SYMBOLS 1 ridge part 21a ... inclined surface 22 ... 2nd ridge part for terminals 23 ... 1st auxiliary press fit receiving part 24 ... 2nd auxiliary press fit receiving part 25 ... 3rd ridge part for terminals 26 ... notch part 27 ... pedestal part 28 ... Guide wall 29a ... Inclined surface 29 ... No. For terminal Ridge 30 ... fifth ridge for terminal 31 ... sixth ridge for terminal 32 ... third auxiliary press-fit portion 33 ... guide recess 34 ... fourth auxiliary press-fit portion 35 ... bulge 36 ... support recess 36a ... Inclined surface 37 ... Protruding portion for preventing erroneous mounting 38 ... Card receiving surface 39 ... Relief recess 40 ... Second side wall 41 ... First window portion 42 ... Second window portion 43 ... First ridge portion 44 for electromagnet 44 ... Electromagnet Second ridge portion 45 ... First guide piece 45a ... Inclined surface 46 ... Second guide piece 47 ... First auxiliary guide 48 ... Third ridge portion for electromagnet 48a ... Inclined surface 49 ... Fourth ridge portion for electromagnet DESCRIPTION OF SYMBOLS 50 ... 5th protrusion part for electromagnets 51 ... 2nd auxiliary guide 52 ... Fixed contact terminal 53 ... Movable contact terminal 54 ... Fixed terminal part 55 ... Fixed contact 56 ... Movable terminal part 57 ... Contact piece part 58 ... Movable contact 59 ... Saddle 60 ... Spool 61 ... Body 61a ... Center hole 62 ... Carp 63 ... Iron core 64 ... Magnetic pole part 65 ... Yoke 66 ... Leaf spring 67 ... Locking part 68 ... Coil terminal holding part 69 ... Coil terminal 70 ... Opening part 71 ... Pressing part 72 ... Supporting shaft 73 ... Shaft part 74 ... Projection 75 ... Press receiving part 76 ... Pressing protrusion 77 ... Protruding protrusion 77a ... Inclined surface 78 ... Pressing protrusion 79 ... Relieving bent part

As a means for solving the above problems, the present invention provides:
Electromagnetic relay
It has a substantially rectangular parallelepiped shape, has a first space part and a second space part that are divided by a partition wall and communicated with each other by an operation hole formed in the partition wall, and one long side of the first space part is open. The second space portion is made of a synthetic resin material having an opening on the long side opposite to the first space portion;
A contact mechanism having a fixed contact terminal and a movable contact terminal arranged in the first space, and the movable contact of the movable contact terminal is opposed to the fixed contact provided in the fixed contact terminal so as to be able to contact and separate; ,
The coil is wound around the iron core via a spool, arranged in the second space, excited by energizing the coil to rotate the movable iron piece, and the contact mechanism portion via the operation hole. An electromagnet block to be driven;
With
The base may have a window in the side wall of one of the long sides constituting the first space or the second space,
In the first space portion or the second space portion, a support protrusion that is visible from the window and on which the electromagnet block or the contact mechanism portion is placed is formed .

With this configuration, it is possible to detect both the electromagnet block and the contact mechanism portion at one time through one space portion and the window portion. Thereby, it becomes possible to grasp | ascertain correctly the positional relationship of both members. In addition, it is possible to suppress the area in contact with the electromagnet block or the contact mechanism portion and set the supporting position with high accuracy.

Claims (8)

It has a substantially rectangular parallelepiped shape, has a first space part and a second space part that are divided by a partition wall and communicated with each other by an operation hole formed in the partition wall, and one long side of the first space part is open. The second space portion is made of a synthetic resin material having an opening on the long side opposite to the first space portion;
A contact mechanism having a fixed contact terminal and a movable contact terminal arranged in the first space, and the movable contact of the movable contact terminal is opposed to the fixed contact provided in the fixed contact terminal so as to be able to contact and separate; ,
The coil is wound around the iron core via a spool, arranged in the second space, excited by energizing the coil to rotate the movable iron piece, and the contact mechanism portion via the operation hole. An electromagnet block to be driven;
With
The said base has a window part in the side wall of either long side which comprises a 1st space part or a 2nd space part, The electromagnetic relay characterized by the above-mentioned.   The electromagnetic relay according to claim 1, wherein the window portion is formed at two locations separated along a long side of the base.   2. The support protrusion, which is visible from the window and on which the electromagnet block or the contact mechanism is placed, is formed in the first space or the second space. 2. The electromagnetic relay according to 2.   4. The clamping base according to claim 1, wherein a clamping projection that allows clamping of the electromagnet block or the components of the contact mechanism is formed between the base and the projection. 5. The electromagnetic relay described in 1.   5. The electromagnetic relay according to claim 3, wherein the supporting protrusion is configured by a protrusion having a substantially arc-shaped cross section extending in an insertion direction of the electromagnet block or the contact mechanism portion. The electromagnet block includes a yoke that is crimped and fixed to one end of an iron core, extends to the other end along the wound coil, and rotatably supports the movable iron piece at the other end.
The supporting protrusion supports the yoke of the electromagnet block,
6. The electromagnetic relay according to claim 1, wherein each of the supporting protrusions is extended on an inner surface of the window portion. The fixed contact terminal includes a fixed terminal portion to which the fixed contact is fixed,
The movable contact terminal includes a movable terminal portion, and a contact piece portion extending from the movable terminal portion to which the movable contact is fixed,
The base has a fixed terminal mounting portion having a support protrusion on which the fixed terminal portion of the fixed contact terminal is placed in the first space portion, and a support on which the movable terminal portion of the movable contact terminal is placed. A movable terminal mounting portion having a projecting portion for,
The said window part each formed in the position which can visually recognize each said protrusion for support, The said protrusion part was extended to the inner surface which comprises each window part, The one of Claim 1 to 5 characterized by the above-mentioned. The electromagnetic relay according to item 1. The clamping protrusion has a press-fitting allowance that is scraped off when clamping the components of the electromagnet block or the contact mechanism.
The electromagnetic relay according to any one of claims 4 to 7, wherein the window portion is capable of discharging a plastic resin material having a press-fit allowance removed.

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