JP4591224B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay that opens and closes an electric circuit, and is effective when applied to an electromagnetic relay for a vehicle.

  A conventional electromagnetic relay has a movable member in which a movable iron piece, a leaf spring, and a movable contact are integrated. When the electromagnetic coil is not energized, the movable member abuts against a stopper to define the moving range of the movable member. It is like that.

Then, a rubber sheet-like elastic member is attached to the stopper so that the collision noise is reduced when the energization of the electromagnetic coil is interrupted and the movable member collides with the stopper. Here, the elastic member is held by the stopper in a state where the vicinity of the central portion of the elastic member protrudes toward the movable member, in other words, the vicinity of the central portion of the elastic member is separated from the stopper (for example, Patent Documents). 1).
JP 2002-110014 A

  However, in the electromagnetic relay described in Patent Document 1, in the process in which the energization of the electromagnetic coil is interrupted and the movable member moves toward the stopper side, the elastic member bends until the vicinity of the central portion of the elastic member hits the stopper. After the deformation (shear deformation) and the vicinity of the central portion of the elastic member hits the stopper, the elastic member is compressed and deformed.

  And since rubber is hard to compress and deform compared to shear deformation, the cushioning effect by the elastic member cannot be expected so much from the time when the vicinity of the central portion of the elastic member hits the stopper, and the impact sound cannot be reduced sufficiently. There was a problem.

  In view of the above points, an object of the present invention is to sufficiently reduce collision noise in an electromagnetic relay.

In the present invention, the first elastic member (26) made of an elastic body is attached to one of the suction members (14, 18) and the movable members (19, 21, 22, 23). A first escape space (211) through which one elastic member (26) can enter is formed, and the first elastic member (26) of the suction members (14, 18) and the movable members (19, 21, 22, 23) is formed. The first member (141a) that protrudes toward the first elastic member (26) is provided at a position facing the first escape space (211) on the other member that is not mounted), and is movable. When the member (19, 21, 22, 23) is sucked toward the suction member (14, 18), the first elastic member (26) is in contact with the first protrusion (141a) and deformed. It is configured to enter the escape space (211) Preparative, the first feature.

  As the first elastic member, for example, a first elastic member made of rubber can be used.

  According to this, when the movable member is sucked to the suction member side, the first elastic member enters the first escape space while being deformed while abutting against the first protrusion, so that the shear deformation region of the first elastic member Can be enlarged. As a result, when the movable member is sucked to the suction member side, it becomes easy to stop the movable member within the shear deformation region of the first elastic member, and the buffering effect is reliably exerted on the first elastic member. The collision sound can be sufficiently reduced.

  In addition, as described above, since the shear deformation region of the first elastic member can be enlarged to increase the moving range of the movable member, the movable contact contacts the fixed contact when the movable member is attracted to the suction member side. In the case of a contact type electromagnetic relay, the movable member can be easily and reliably moved to a position where the movable contact contacts the fixed contact.

According to the present invention, the second elastic member (27) made of an elastic body is attached to one of the movable members (19, 21, 22, 23) and the stopper (17), and the second elastic member A penetrating second escape space (171) into which (27) can enter is formed, and the second elastic member (27) of the movable members (19, 21, 22, 23) and the stopper (17) is not mounted. The other member is provided with a second protrusion (213) protruding toward the second elastic member (27) at a position facing the second escape space (171), and the movable members (19, 21, 22 and 23) move away from the suction members (14 and 18), and the second elastic member (27) comes into contact with the second protrusion (213) and is deformed, so that the second escape space (171) Configured to penetrate , The second feature.

  According to this, when the movable member moves away from the suction member, the second elastic member enters the second escape space while being deformed while abutting against the second protrusion, so that the shear deformation of the second elastic member The area can be enlarged. As a result, when the movable member moves away from the suction member, it becomes easy to stop the movable member within the shear deformation region of the second elastic member, and the second elastic member can reliably exert a buffering effect. Thus, the collision noise can be sufficiently reduced.

  In addition, since the shear deformation region of the second elastic member can be enlarged as described above to increase the moving range of the movable member, the movable contact becomes a fixed contact when the movable member moves away from the suction member. In the case of a contact type electromagnetic relay, the movable member can be easily and reliably moved to a position where the movable contact contacts the fixed contact.

In the present invention, the first elastic member (26) made of an elastic body is attached to one of the suction members (14, 18) and the movable members (19, 21, 22, 23). A first escape space (211) through which one elastic member (26) can enter is formed, and the first elastic member (26) of the suction members (14, 18) and the movable members (19, 21, 22, 23) is formed. The first member (141a) that protrudes toward the first elastic member (26) is provided at a position facing the first escape space (211) on the other member that is not mounted), and is movable. When the member (19, 21, 22, 23) is sucked toward the suction member (14, 18), the first elastic member (26) is in contact with the first protrusion (141a) and deformed. It is configured to enter the escape space (211) and is movable One of the members (19, 21, 22, 23) and the stopper (17) is fitted with a second elastic member (27) made of an elastic body and the second elastic member (27) enters. possible penetrating second relief space (171) is formed in the other member in which the second elastic member of the movable member (19,21,22,23) and the stopper (17) (27) is not attached A second protrusion (213) protruding toward the second elastic member (27) is provided at a position facing the second escape space (171), and the movable members (19, 21, 22, 23) are provided. When moving away from the suction members (14, 18), the second elastic member (27) is in contact with the second protrusion (213) and is deformed so as to enter the second escape space (171). The third feature is that it is configured To.

  According to this, the effect by the first feature and the effect by the second feature can be obtained.

  According to the present invention, the first groove (212) into which the first elastic member (26) is inserted is formed on one side of the first escape space (211) on one member to which the first elastic member (26) is attached. A fourth feature is that the formed first ring-shaped elastic member (26) is inserted into the first groove (212) and held by one member.

  According to this, since the first elastic member is held by one member only by inserting the ring-shaped first elastic member into the first groove, the first elastic member can be easily assembled to the one member.

  According to the present invention, the second groove (172) into which the second elastic member (27) is inserted is formed on both sides of the second escape space (171) in one member to which the second elastic member (27) is attached. A fifth feature is that the formed, ring-shaped second elastic member (27) is inserted into the second groove (172) and held by one member.

  According to this, since the second elastic member is held by one member only by inserting the ring-shaped second elastic member into the second groove, the second elastic member can be easily assembled to the one member.

  In the present invention, the first elastic member (26) is attached to a resin coupling member (21) in the movable member, and the first protrusion (141a) is provided on the resin bobbin (141) in the electromagnetic coil. This is the sixth feature.

  According to this, since the connecting member is made of resin, the first escape space and the first groove can be easily provided in the connecting member. Moreover, since the bobbin is made of resin, the first protrusion can be easily provided on the bobbin.

  The seventh feature of the present invention is that the second protrusion (213) is provided on a resin-made connecting member (21) in the movable member.

  According to this, since the connecting member is made of resin, the second protrusion can be easily provided on the connecting member.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

  An embodiment of the present invention will be described. 1 is a cross-sectional view showing a state when a coil is not energized in an electromagnetic relay according to an embodiment of the present invention, FIG. 2 is an enlarged view showing a state when a coil is energized in part A of FIG. 1, and FIG. FIG. 4 is a view in the direction of arrow C, FIG. 4 is a view of the movable member in the electromagnetic relay of FIG. 1 as viewed from the direction C in FIG. 1, FIG. 5 is an enlarged sectional view of a portion D in FIG. An arrow view and FIG. 7 are C arrow views which looked at the stopper and elastic member in the electromagnetic relay of FIG. 1 from the C direction of FIG.

  As shown in FIG. 1, a bottomed cylindrical case 11 made of resin is fitted to a plate-like base 10 made of resin, and a space (hereinafter referred to as an internal space) is formed between the base 10 and the case 11. ) 10a is formed.

  Two circuit terminals 12 (only one is shown) are fixed to the base 10 by press fitting or the like. The fixed contacts 13 made of conductive metal are caulked and fixed to the ends of the two circuit terminals 12 on the inner space 10a side. One end of each of the two circuit terminals 12 protrudes from the base 10, one is connected to an electric load (not shown), and the other is connected to a power source (not shown).

  Further, two coil terminals 15 (only one is shown) connected to the electromagnetic coil 14, a yoke 16, and a stopper 17 are fixed to the base 10 by press fitting or the like.

  The electromagnetic coil 14 has a resin bobbin 141 and a coil wire 142 wound around the bobbin 141, and generates electromagnetic force when energized. A fixed core 18 made of a magnetic metal material is disposed in the center hole of the bobbin 141. The electromagnetic coil 14 and the fixed iron core 18 constitute a suction member of the present invention.

  The yoke 16 is made of a magnetic metal material and constitutes a magnetic path of magnetic flux induced by the electromagnetic coil 14. The electromagnetic coil 14 is fixed to the yoke 16.

  A movable iron piece 19 made of a magnetic metal is disposed at a position facing the fixed iron core 18, and the movable iron piece 19 is attracted to the fixed iron core 18 side when the coil is energized. The movable iron piece 19 is connected to the yoke 16 by a metal connecting plate 20 bent in a substantially L shape. The connecting plate 20 causes the movable iron piece 19 to act on the movable iron piece 19 in the direction in which the movable iron piece 19 is separated from the fixed iron core 18 when the coil is not energized.

  A U-shaped conductive metal leaf spring 22 is coupled to the movable iron piece 19 by a resin coupling member 21 (see FIG. 4). A movable contact 23 made of a conductive metal is caulked and fixed to both ends of the leaf spring 22, and the movable contact 23 is disposed to face the fixed contact 13. The movable iron piece 19, the connecting member 21, the leaf spring 22, and the movable contact 23 are configured to move integrally, and constitute the movable member of the present invention.

  Near the fixed contact 13 and the movable contact 23 in the case 11, a permanent magnet 24 for interrupting an arc generated when the movable contact 23 leaves the fixed contact 13 is disposed.

  When the electromagnetic coil 14 is energized, the movable iron piece 19 is attracted to the fixed iron core 18 side by the electromagnetic force, the movable contact 23 comes into contact with the fixed contact 13, and the two fixed contacts 13 are connected by the leaf spring 22. This closes the electrical circuit.

  On the other hand, when the energization of the electromagnetic coil 14 is interrupted, the movable contact 23 is separated from the fixed contact 13 by the elastic force of the connecting plate 20, and the electric circuit is opened.

  Next, features of the present embodiment will be described. As shown in FIGS. 1 to 4, a ring-shaped first elastic member 26 is attached to the connecting member 21. The first elastic member 26 is made of a non-metallic solid elastic body. More specifically, the first elastic member 26 is made of rubber (for example, fluororubber) rich in elasticity and heat resistance. Incidentally, the shape of the first elastic member 26 when the first elastic member 26 is viewed from the direction B in FIG. 2 is a substantially perfect circle in a free state where the first elastic member 26 is not attached to the connecting member 21, and is attached to the connecting member 21. In addition, it is elliptical in a state away from a first protrusion 141a described later.

  The bobbin 141 is integrally formed with a first protrusion 141a that protrudes toward the first elastic member 26 side. When the coil is not energized, the first elastic member 26 and the first protrusion 141a are separated from each other. On the other hand, when the electromagnetic coil 14 is energized and the movable iron piece 19 is attracted to the fixed iron core 18, the first elastic member 26 is separated from the first elastic member 26. The member 26 comes into contact with the first protrusion 141a, and the first elastic member 26 is bent.

  The connecting member 21 is formed with a first escape space 211 into which the bent portion of the first elastic member 26 can enter when the first elastic member 26 is bent. The first escape space 211 is rectangular and has a through hole. The first protrusion 141 a described above is provided at a position facing the first escape space 211.

  The connecting member 21 has first grooves 212 formed on both sides of the first escape space 211. The first elastic member 26 is held by the connecting member 21 by inserting the first elastic member 26 into the two first grooves 212. In addition, the part which the 1st elastic member 26 contacts in the connection member 21 is chamfered.

  As shown in FIGS. 1 and 5 to 7, the stopper 17 is formed by press-molding a metal plate material and is disposed at a position facing the connecting member 21. The stopper 17 has a ring-shaped second shape. An elastic member 27 is attached. The second elastic member 27 is made of a non-metallic solid elastic body. More specifically, the second elastic member 27 is made of rubber (for example, fluororubber) rich in elasticity and heat resistance. Incidentally, the shape of the second elastic member 27 when the second elastic member 27 is viewed from the direction E in FIG. 5 is a substantially perfect circle in a free state where the second elastic member 27 is not attached to the stopper 17, and is attached to the stopper 17. In the state away from the 2nd projection part 213 mentioned later, it is elliptical.

  A second protrusion 213 that protrudes toward the second elastic member 27 is integrally formed on the connecting member 21. When the electromagnetic coil 14 is energized and the movable iron piece 19 is attracted to the fixed iron core 18 side, the second elastic member 27 and the second protrusion 213 are separated from each other. On the other hand, when the coil is not energized, the second elastic member 27 abuts on the second protrusion 213 so that the second elastic member 27 bends.

  The stopper 17 is formed with a notch-shaped second relief space 171 into which the bent portion of the second elastic member 27 can enter when the second elastic member 27 is bent. The second protrusion 213 described above is provided at a position facing the second escape space 171.

  Further, the stopper 17 has second grooves 172 formed on both sides of the second escape space 171. The second elastic member 27 is held by the stopper 17 by inserting the second elastic member 27 into the two second grooves 172. Note that the portion of the stopper 17 where the second elastic member 27 hits is chamfered.

  The stopper 17 defines a moving range in which the movable member such as the movable iron piece 19 moves away from the fixed iron core 18, and adjusts the position of the stopper 17 to adjust the gap between the contacts to a predetermined range. .

  Specifically, a penetrating stopper insertion hole 101 is formed in the base 10, and the stopper 17 is pushed into the stopper insertion hole 101 to the deepest part, and the gap between the contacts is measured. In this state, since the gap between the contacts is excessive, the stopper 17 is pushed back toward the connecting member 21 until the gap between the contacts is within a predetermined range. Next, resin is melted into the stopper insertion hole 101 to fix the position of the stopper 17.

  According to this embodiment, when the movable iron piece 19 is attracted to the fixed iron core 18 side, the first elastic member 26 enters the first escape space 211 while being deformed in contact with the first protrusion 141a. 1 The shear deformation region of the elastic member 26 can be enlarged. As a result, when the movable iron piece 19 is attracted toward the fixed iron core 18, it becomes easy to stop the movable member such as the movable iron piece 19 in the shear deformation region of the first elastic member 26, and the first elastic member 26. Thus, it is possible to reliably exhibit the buffering effect and sufficiently reduce the collision sound.

  Further, when the movable member such as the movable iron piece 19 moves in a direction away from the fixed iron core 18, the second elastic member 27 enters the second escape space 171 while being in contact with the second protrusion 213 and being deformed. The shear deformation region of the second elastic member 27 can be enlarged. As a result, when the movable member such as the movable iron piece 19 moves away from the fixed iron core 18, it becomes easy to stop the movable member such as the movable iron piece 19 within the shear deformation region of the second elastic member 27. It is possible to cause the second elastic member 27 to exhibit a buffering effect and to sufficiently reduce the collision sound.

  Further, as described above, the range of movement of the movable member such as the movable iron piece 19 can be increased by enlarging the shear deformation region of the first elastic member 26, so that the movable contact 23 can be moved to a position where it contacts the fixed contact 13. A movable member such as the iron piece 19 can be easily and reliably moved.

  Moreover, since the 1st elastic member 26 is hold | maintained by the connection member 21 only by inserting the ring-shaped 1st elastic member 26 in the 1st groove | channel 212 of the connection member 21, the assembly | attachment of the 1st elastic member 26 with respect to the connection member 21 is carried out. Is easy.

  Further, since the second elastic member 27 is held by the stopper 17 simply by inserting the ring-shaped second elastic member 27 into the second groove 172 of the stopper 17, the second elastic member 27 can be easily assembled to the stopper 17. is there.

  Further, since the connecting member 21 is made of resin, the first escape space 211, the first groove 212, and the second protrusion 213 can be easily provided in the connecting member 21. In addition, since the bobbin 141 is made of resin, the first protrusion 141a can be easily provided on the bobbin 141.

(Other embodiments)
In the above embodiment, the first elastic member 26 is attached to the connecting member 21 and the first protrusion 141a is formed on the bobbin 141. However, the first elastic member 26 is attached to the suction member such as the bobbin 141, and the first protrusion The portion 141a may be formed on a movable member such as the connecting member 21.

  Moreover, in the said embodiment, although the 2nd elastic member 27 was mounted | worn with the stopper 17, and the 2nd projection part 213 was formed in the connection member 21, the 2nd elastic member 27 is mounted | worn with movable members, such as the connection member 21, The second protrusion 213 may be formed on the stopper 17.

  In the above embodiment, the stopper 17 is made of metal, but the stopper 17 may be made of resin. In this case, the stopper 17 may be integrally formed with the base 10.

  Moreover, in the said embodiment, when the movable iron piece 19 was attracted | sucked to the fixed iron core 18 side, the electromagnetic contact of the type which the movable contact 23 contact | abuts to the fixed contact 13 was shown, However, A movable iron piece moves to the direction away from a fixed iron core The electromagnetic contact of the type that the movable contact abuts the fixed contact, the fixed contact that the movable contact abuts when the movable iron piece is attracted to the fixed iron core, and the movable iron piece moved away from the fixed iron core The present invention can also be applied to an electromagnetic relay having a fixed contact with which a movable contact abuts.

It is sectional drawing which shows the state at the time of the coil non-energization of the electromagnetic relay which concerns on one Embodiment of this invention. It is an enlarged view which shows the state at the time of coil energization of the A section of FIG. FIG. FIG. 2 is a C arrow view of a movable member in the electromagnetic relay of FIG. 1 viewed from the C direction of FIG. 1. It is an expanded sectional view of the D section of FIG. It is E arrow line view of FIG. FIG. 2 is a C arrow view of the stopper and the elastic member in the electromagnetic relay of FIG. 1 viewed from the C direction of FIG. 1.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 13 ... Fixed contact, 14 ... Electromagnetic coil (suction member), 18 ... Fixed iron core (suction member), 19 ... Movable iron piece (movable member), 21 ... Connection member (movable member), 22 ... Leaf spring (movable member), 23 ... movable contact (movable member), 26 ... first elastic member, 141a ... first projection, 211 ... first escape space.

Claims (7)

A suction member (14, 18) having a fixed iron core (18) disposed in an electromagnetic coil (14) that generates an electromagnetic force when energized, and the suction member (14, 18) by the electromagnetic force of the electromagnetic coil (14) A movable member (19, 21, 22, 23) sucked to the side, the movable member (19, 21, 22, 23) includes a movable contact (23), and the movable contact (23) and a fixed contact In an electromagnetic relay that opens and closes an electric circuit by contacting and separating from (13),
A first elastic member (26) made of an elastic body is attached to one of the suction member (14, 18) and the movable member (19, 21, 22, 23), and the first the first relief space (211) is formed an elastic member (26) penetrates possible intrusion,
Of the suction member (14, 18) and the movable member (19, 21, 22, 23), the other member not mounted with the first elastic member (26) is provided with the first elastic member (26). A first protrusion (141a) protruding toward the side is provided at a position facing the first escape space (211);
When the movable member (19, 21, 22, 23) is sucked toward the suction member (14, 18), the first elastic member (26) is in contact with the first protrusion (141a). An electromagnetic relay configured to enter the first escape space (211) while being deformed. A suction member (14, 18) having a fixed iron core (18) disposed in an electromagnetic coil (14) that generates an electromagnetic force when energized, and the suction member (14, 18) by the electromagnetic force of the electromagnetic coil (14) Movable member (19, 21, 22, 23) sucked to the side, and a stopper (9) that defines a moving range in which the movable member (19, 21, 22, 23) moves away from the suction member (14, 18). 17), and the movable member (19, 21, 22, 23) includes a movable contact (23), and opens and closes an electric circuit by contacting and separating the movable contact (23) and the fixed contact (13). In electromagnetic relay,
A second elastic member (27) made of an elastic body is attached to one of the movable members (19, 21, 22, 23) and the stopper (17), and the second elastic member ( A second escape space (171) is formed through which 27) can enter;
Of the movable members (19, 21, 22, 23) and the stopper (17), the other member to which the second elastic member (27) is not attached is directed toward the second elastic member (27). A second projecting portion (213) protruding in a position facing the second escape space (171),
When the movable member (19, 21, 22, 23) moves in a direction away from the suction member (14, 18), the second elastic member (27) comes into contact with the second protrusion (213). The electromagnetic relay is configured to enter the second escape space (171) while being deformed. A suction member (14, 18) having a fixed iron core (18) disposed in an electromagnetic coil (14) that generates an electromagnetic force when energized, and the suction member (14, 18) by the electromagnetic force of the electromagnetic coil (14) Movable member (19, 21, 22, 23) sucked to the side, and a stopper (9) that defines a moving range in which the movable member (19, 21, 22, 23) moves away from the suction member (14, 18). 17), and the movable member (19, 21, 22, 23) includes a movable contact (23), and opens and closes an electric circuit by contacting and separating the movable contact (23) and the fixed contact (13). In electromagnetic relay,
A first elastic member (26) made of an elastic body is attached to one of the suction member (14, 18) and the movable member (19, 21, 22, 23), and the first the first relief space (211) is formed an elastic member (26) penetrates possible intrusion,
Of the suction member (14, 18) and the movable member (19, 21, 22, 23), the other member not mounted with the first elastic member (26) is provided with the first elastic member (26). A first protrusion (141a) protruding toward the side is provided at a position facing the first escape space (211);
When the movable member (19, 21, 22, 23) is sucked toward the suction member (14, 18), the first elastic member (26) is in contact with the first protrusion (141a). It is configured to enter the first escape space (211) while being deformed,
A second elastic member (27) made of an elastic body is attached to one of the movable members (19, 21, 22, 23) and the stopper (17), and the second elastic member ( A penetrating second escape space (171) is formed through which 27) can enter;
Of the movable members (19, 21, 22, 23) and the stopper (17), the other member to which the second elastic member (27) is not attached is directed toward the second elastic member (27). A second projecting portion (213) protruding in a position facing the second escape space (171),
When the movable member (19, 21, 22, 23) moves in a direction away from the suction member (14, 18), the second elastic member (27) comes into contact with the second protrusion (213). The electromagnetic relay is configured to enter the second escape space (171) while being deformed. The one member to which the first elastic member (26) is attached has first grooves (212) into which the first elastic member (26) is inserted on both sides of the first escape space (211). Formed,
The electromagnetic relay according to claim 1 or 3, wherein the first elastic member (26) has a ring shape and is inserted into the first groove (212) and held by the one member. . The one member to which the second elastic member (27) is attached has second grooves (172) into which the second elastic member (27) is inserted on both sides of the second escape space (171). Formed,
The electromagnetic relay according to claim 2 or 3, wherein the second elastic member (27) has a ring shape and is inserted into the second groove (172) and held by the one member. . The electromagnetic coil (14) includes a resin bobbin (141) and a coil wire (142) wound around the bobbin (141).
The movable members (19, 21, 22, 23) are arranged on the suction member (14, 18) side by the electromagnetic force of the leaf spring (22) to which the movable contact (23) is mounted and the electromagnetic coil (14). A movable iron piece (19) made of a magnetic material that is attracted to the resin, and a connecting member (21) made of resin that connects the leaf spring (22) and the movable iron piece (19),
The first elastic member (26) is attached to the connecting member (21),
The electromagnetic relay according to any one of claims 1, 3, and 4, wherein the first protrusion (141a) is provided on the bobbin (141). The movable members (19, 21, 22, 23) are arranged on the suction member (14, 18) side by the electromagnetic force of the leaf spring (22) to which the movable contact (23) is mounted and the electromagnetic coil (14). A movable iron piece (19) made of a magnetic material that is attracted to the resin, and a connecting member (21) made of resin that connects the leaf spring (22) and the movable iron piece (19),
The second elastic member (27) is attached to the stopper (17),
The electromagnetic relay according to any one of claims 2, 3, and 5, wherein the second protrusion (213) is provided on the connecting member (21).

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