JP2010010059A - Electromagnetic switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic switch capable of accurately and quickly performing a connection operation of an external connector of an external circuit. <P>SOLUTION: The electromagnetic switch is connected with an electromagnetic coil 32, and connects a connector 100 with a pointed head of a lead wire 33a pulled out of a case 10, and is connected with the external circuit via the external connector 110 fitted to the connector 100. The connector 100 is detachably mounted on a step 80 for mounting formed at a one-side side face of the case 10 by slidably moving the connector from its side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electromagnetic switch, and more particularly to an electromagnetic switch applicable to a power load electromagnetic relay or the like.

  Conventionally, as an electromagnetic switching device, for example, as shown in FIG. 1 of Patent Document 1, an electromagnet device 2 having a movable iron core 22, a pair of fixed terminals 3 each having a fixed contact 32, and movable contacts at left and right ends. There is an electromagnetic switching device 1 including a movable contact 4 having 41, a shaft 5, and a surrounding member 6 that houses the movable contact 41 and the fixed contact 32. Further, by moving the movable iron core 22 back and forth along one axis by the electromagnet device 2, the pair of movable contacts 41 are brought into contact with and separated from the pair of fixed contacts 32 through the shaft 5, respectively. Are electrically connected to each other and insulated. A substantially sealed space serving as an arc extinguishing space is formed by the surrounding member and at least the first yoke, and the movable contact and the fixed contact are accommodated therein. Further, the gap 12 between the container body 11 and the substantially sealed space 63 is filled with a potting material 12a. In the electromagnetic switching device 1, as shown in FIGS. 6 and 7 of Patent Document 1, the lead wire connected to the solenoid coil 21 is drawn out from the container body 11 shielded by the potting material 12a.

However, Patent Document 1 merely discloses that the lead wire is simply pulled out from the body 11. For this reason, the installation and connection work in the field takes time and workability is low. Therefore, it is conceivable to fix the connector connected to the solenoid coil 21 to the container 11.
JP 2006-19148 A

  However, when the connector is fixed to the body 11, for example, when the electromagnetic switching device 1 is arranged in an engine room of an automobile, when the external connector is fitted and connected to the connector, the connector and the external connector During the connection work, the engine, the battery, etc. get in the way, and there is a problem that it is not easy to connect the connector and the external connector accurately and quickly.

  In view of the above problems, an object of the present invention is to provide an electromagnetic switching device capable of accurately and quickly performing a connection operation with an external connector of an external circuit.

  In order to solve the above problems, a contact device according to the present invention connects a connector to the tip of a lead wire that is connected to an electromagnetic coil and pulled out from a housing, and via an external connector fitted to the connector. An electromagnetic switching device connected to an external circuit is configured such that the connector is detachably mounted on a mounting step formed on at least one side surface of the housing by sliding from the side.

According to the present invention, since the connector connected to the tip of the lead wire and the external connector connected to the external circuit are connected, the connector can be detachably attached to the mounting step provided in the housing. Can be performed accurately and quickly.
In particular, even when the electromagnetic switchgear according to the present invention is installed in a corner of an automobile engine room or the like, the connector can be attached to and detached from the housing after the lead wire is pulled out to connect the connector and the external connector. Therefore, an electromagnetic switching device that can be easily connected can be obtained.

As embodiment concerning this invention, you may form the step part for attachment in the both side surfaces which a housing opposes, respectively.
According to the present embodiment, since the connector can be attached to any one of the mounting steps, an electromagnetic switching device that can be more easily connected is obtained.

As another embodiment according to the present invention, an elastic arm portion for removably preventing the connector from being detached from the housing is orthogonal to the mounting direction of the connector and parallel to the mounting step portion. It may be protruding.
According to this embodiment, since the mounting step portion is used as a reference surface in the mounting operation, the elastic arm portion can be detachably mounted, so that the connection operation is further facilitated.

A power load electromagnetic relay, which is an embodiment to which an electromagnetic switching device according to the present invention is applied, will be described with reference to the accompanying drawings of FIGS.
The power load electromagnetic relay according to the first embodiment, as shown in FIG. 1 to FIG. 8, roughly accommodates the drive mechanism unit 20 and the contact mechanism unit 50 integrated vertically in the case 10, The case 10 is covered and covered with a cover 70.

  As shown in FIGS. 7 and 8, the case 10 has a box shape having a bottom surface that can accommodate a drive mechanism unit 20 described later, and is used for fitting for positioning the drive mechanism unit 20 at the center of the bottom surface. A recess 11 is provided. The case 10 has a mounting hole 13 and a reinforcing rib 14 projectingly provided on a pedestal part 12 projecting laterally from the lower edge of the outer peripheral corner. However, one of the pedestal portions 12 is not provided with an attachment hole and serves as a mark at the time of attachment. Further, the case 10 is provided with an engagement hole 15 for preventing a cover 70 described later from coming off at the opening edge of the opposite side wall.

  As shown in FIG. 7, the drive mechanism unit 20 has a coil mounted on a spool 31 between a first yoke 21 having a substantially U-shaped cross section and a second yoke 22 spanning both ends of the first yoke 21. An electromagnet block 30 around which 32 is wound is fixed.

  The first yoke 21 is provided with an insertion hole 21a for inserting a bottomed cylindrical body 34, which will be described later, at the center of the bottom surface, and a notch for fitting the second yoke 22 to both ends thereof. 21b is formed.

  The second yoke 22 has a planar shape in which both end portions thereof can be engaged with the cutout portions 21b of the first yoke 21 and can be bridged, and a caulking hole 22a is provided in the center portion thereof. The second yoke 22 is airtightly joined to a countersunk hole (not shown) provided at a corner of the upper surface thereof by brazing a gas-filled pipe (not shown).

  The electromagnet block 30 is formed by winding a coil 32 around a spool 31 having flange portions 31a and 31b at both ends, and a lead wire for the coil 32 is connected to a relay terminal (not shown) provided on the flange portion 31a. It is soldered with tie. Further, lead wires 33a are connected to the relay terminals. A bottomed cylindrical body 34 is inserted into a center hole 31c that penetrates the flange portions 31a and 31b of the spool 31. The upper opening of the bottomed cylindrical body 34 is hermetically joined to the lower surface of the second yoke 22 by laser welding. The bottomed cylindrical body 34 is fitted with an annular auxiliary yoke 35 at the lower end protruding from the insertion hole 21 a of the first yoke 21, and is prevented from coming off by an O-ring 36. The O-ring 36 keeps the annular auxiliary yoke 35 from coming off and performs a sound absorbing and vibration absorbing function.

  According to the present embodiment, the facing area between the outer peripheral surface of the movable iron core 42, which will be described later, and the first yoke 21 and the annular auxiliary yoke 35 is increased, and the magnetic resistance is reduced. There is an advantage that electric power can be reduced.

  In the bottomed cylindrical body 34, a fixed iron core 40, a return coil spring 41, and a movable iron core 42 are sequentially stored. The upper end of the fixed iron core 40 is caulked and fixed to the caulking hole 22 a of the second yoke 22. For this reason, the movable iron core 42 is urged downward by the spring force of the return coil spring 41, and a rubber shock-absorbing disc 48 is mounted in a recess provided on the bottom surface thereof. Further, the bottomed cylindrical body 34 houses an adhesion preventing metal sheet 49 between the inner bottom surface and the rubber shock absorbing disk 48.

  The movable iron core 42 has a shaft hole having an inner diameter into which a drive shaft 61 to be described later can be inserted, and an upper movable iron piece 44, a ring-shaped magnet 45, and a lower movable iron piece are connected to a connecting pipe 43 made of a nonmagnetic material. 46 is inserted and integrated. A desired magnetic circuit can be formed by shielding the magnetic force of the ring-shaped magnet 45 with the connecting pipe 43.

  The contact mechanism unit 50 is configured such that a shield member 55 and a movable contact block 60 are disposed in a sealed space formed by connecting and integrating a ceramic sealing container 51 on the upper surface of the second yoke 22.

  The sealing container 51 has a pair of substantially T-shaped fixed contact terminals 52 and 53 brazed to the ceiling surface, and a connecting annular skirt portion 54 brazed to the lower opening edge. . The fixed contact terminals 52 and 53 are provided with screws 52a and 53a. Then, the annular skirt portion 54 is positioned on the upper surface of the second yoke 22 and integrated by welding with a laser to form the sealed space.

  The shield member 55 is formed by fitting a metal shielding ring 57 to a shallow box-shaped resin molded product 56 having a through-hole in the center, and a caulking protrusion protruding from the bottom surface of the box-shaped resin molded product 56. It is caulking and integrated. The metal shield ring 57 attracts an arc generated when the contact is opened and closed, and prevents the brazed portion of the sealing container 51 from melting.

  The movable contact block 60 includes a drive shaft 61 having a substantially T-shaped cross section, a plate-shaped first electromagnetic iron piece 62, a movable contact 63, a second electromagnetic iron piece 64 having a substantially U-shaped cross section, a coil spring 65 for contact pressure, and a substantially cross-sectional shape. A V-shaped contact pressure leaf spring 66 and a washer 67 are sequentially inserted, and an E-ring 68 is engaged and assembled with an annular groove formed on the outer peripheral surface of the drive shaft 61. In particular, the first electromagnetic iron piece 62, the movable contact 63 and the second electromagnetic iron piece 64 are biased upward via the contact pressure coil spring 65. As a result, a minute gap is formed between the lower surface of the movable contact 63 and both ends of the contact pressure leaf spring 66, and a time lag is generated during operation.

  Further, the contact pressure leaf spring 66 is formed with a pair of position restricting locking claws which are respectively locked to both side edges of the movable contact 63 at both ends thereof. For this reason, since the said position control latching claw of the leaf | plate spring 66 latches on the both-sides edge part of the movable contact 63, and presses correctly, there exists an advantage that an electromagnetic relay with the small dispersion | variation in an operating characteristic is obtained.

  A repulsive force is generated between the fixed contact terminals 52 and 53 and the movable contact 63 due to a large current that flows when both ends of the movable contact 63 come into contact with the fixed contact terminals 52 and 53. However, the first and second electromagnetic iron pieces 62 and 64 of the movable contact block 60 generate a magnetic force that attracts each other based on the large current described above, so that the movable contact 63 opens from the fixed contact terminals 52 and 53. Regulates the action to be separated and prevents contact welding due to arcing.

  As shown in FIG. 8, the first and second electromagnetic iron pieces 62 and 64 of the movable contact block 60 according to the first embodiment are arranged at both ends of the first electromagnetic iron piece 62 on the upper surfaces of both end portions of the second electromagnetic iron piece 64. It has a structure in which the parts abut. According to this embodiment, when a large current flows through the movable contact 63 at the initial stage when the movable contact 63 contacts the fixed contact terminals 52 and 53, the first electromagnetic iron piece 62 and the second electromagnetic iron piece 64 are The movable contacts 63 are pressed against the fixed contact terminals 52 and 53 by sucking each other. Therefore, there is an advantage that the movable contact 63 is attracted to the fixed contact terminals 52 and 53 without repelling the fixed contact terminals 52 and 53, no arc is generated, and no contact welding occurs.

  The contact pressure coil spring 65 and the leaf spring 66 are for applying contact pressure to the movable contact 63. In the present embodiment, by combining the coil spring 65 for contact pressure and the leaf spring 66, there is an advantage that the adjustment of the attractive force characteristic becomes easy and the degree of freedom of design is widened.

  The cover 70 has a planar shape that can be fitted into the case 10. The cover 70 is fitted with a holding member 90 made of a substantially U-shaped magnetic material on the inner surface thereof.

  As shown in FIG. 2, the cover 70 is provided with terminal holes 72 and 73 on both sides of an insulating deep groove 71 provided in the center of the ceiling surface. In addition, the cover 70 has receiving portions 74 and 75 projecting laterally from both side surfaces on the short side. In addition, insertion slits into which the external connection terminals 95 and 96 can be respectively inserted are provided at the bases of the receiving portions 74 and 75. The external connection terminals 95 and 96 bent by press working are studded with stud bolts 95a and 96a that can be screwed into connection nuts 97 and 98 on one end side.

  The cover 70 is formed with mounting step portions 80 and 80 on both side surfaces on the long side, and an elastic arm portion 81 for preventing a connector 100 (described later) from being removed on one side surface. It protrudes toward. The step portion 80 located below the elastic arm portion 81 has a guide wall 82 protruding from the outer edge thereof, and a pair of position restricting claw portions 83 and 83 at the upper end portion thereof. Is protruding.

  As shown in FIG. 8, the holding member 90 has positioning protrusions 91 protruding at predetermined pitches on the inner surface facing the holding member 90, and a positioning claw portion 92 is cut and raised from its lower edge. . Two sets of two magnets 93 are arranged so as to face each other through the positioning protrusions 91 and the claw portions 92. The magnet 93 pulls an arc generated between the movable contact 63 and the fixed contact terminals 52 and 53 with a magnetic force so that the arc can be easily extinguished.

  The connector 100 attached to the cover 70 is connected to a lead wire 33 a connected to the coil 32. The connector 100 has a guide groove 101 formed on the inner surface of the connection opening, and a retaining frame 102 formed on the outer surface on one side. An elastic tongue piece 104 having a locking projection 103 is formed on the same side surface as the retaining frame portion 102.

  Then, the connector 100 is placed on the mounting step 80 of the cover 70 and is slid along the guide wall 82 so that the elastic arm 81 is locked to the locking protrusion 103 of the elastic tongue 104. To prevent it from coming off. Further, the position of the lead wire 33a is regulated by engaging with the pair of position regulating claws 83, 83.

  On the other hand, the external connector 110 connected to the connector 100 is a lead wire 111 as shown in FIG. The external connector 110 has a guide protrusion 112 that is slidably fitted into the guide groove 101 of the connector 100 on one side surface thereof, and a positioning protrusion 113 on one end thereof. The external connector 110 is provided with an elastic tongue 115 having a substantially L-shaped cross section provided with a locking projection 114 on the upper surface thereof so as to engage with the retaining frame 102. The external connector 110 has a pair of position restricting ribs 116 projecting from the free end of the elastic tongue 115 on the upper surface thereof.

A method for connecting the electromagnetic relay according to the present embodiment and an external circuit will be described.
In the first connection method, as shown in FIGS. 1 and 2, the guide protrusion 112 of the external connector 110 is slid into the guide groove 101 of the connector 100 connected to the lead wire 33 a drawn out from the case 10. Mating. Then, the locking projections 114 of the external connector 110 are engaged with the retaining frame portion 102 of the connector 100, and the positioning projections 113 of the external connector 110 are locked to the opening edge thereof to restrict the position.
Next, the connector 100 is routed and positioned on the mounting step 80 of the case 10 and is slidably fitted along the guide wall 82. As a result, the elastic arm portion 81 is locked to the locking protrusion 103 of the elastic tongue piece 104, thereby preventing the elastic arm portion 81 from coming off. Then, the connecting operation is completed by locking the lead wire 33a to the position restricting claw portion 83 to prevent the lead wire 33a from coming off.

  As a second connection method, as shown in FIG. 3, the connector 100 may be attached to the mounting step 80 of the cover 70 in advance, and then the external connector 110 may be connected to the connector 100.

The operation of the electromagnetic relay according to this embodiment will be described.
As shown in FIG. 7, when no voltage is applied to the coil 32, the movable iron core 42 is opened from the fixed iron core 40 by the spring force of the return coil spring 41 and the magnetic force of the permanent magnet 45 of the movable iron core 42. Separated. For this reason, both ends of the movable contact 63 are separated from the lower ends of the fixed contact terminals 52 and 53.

  When a voltage is applied to the coil 32, the fixed iron core 40 attracts the movable iron core 42, and the movable iron core 42 moves toward the fixed iron core 40 against the spring force of the return coil spring 41. For this reason, the drive shaft 61 integral with the movable iron core 42 moves in the axial direction, and both end portions of the movable contact 63 abut against the lower end portions of the fixed contact terminals 52 and 53. At this time, a large current flows through the movable contact 63 and a repulsive force is generated between the movable contact 63 and the fixed contact terminals 52 and 53. However, since the magnetic force is generated simultaneously between the first electromagnetic iron piece 62 and the second electromagnetic iron piece 64 and attracts each other, the movement of the movable contact 63 away from the fixed contact terminals 52 and 53 is restricted. Prevents contact welding due to arcing.

  Further, the movable iron core 42 is attracted to the fixed iron core 40 side, and the movable iron core 42 moves against the spring force of the return coil spring 41 and the contact pressure coil spring 65 to increase the contact pressure. Next, the movable contact 63 resists the spring force of the return coil spring 41, the contact pressure coil spring 65, and the contact pressure leaf spring 66, and the movable contact 63 comes into contact with the lower ends of the fixed contact terminals 52 and 53 with a predetermined pressure. The core 61 is adsorbed to the fixed iron core 40 and maintains that state.

  Finally, when the application of voltage to the coil 32 is stopped, the magnetic force is lost, and the movable iron core 42 is separated from the fixed iron core 40 by the spring force of the return coil spring 41. Next, after the movable contact 63 is separated from the fixed contact terminals 52 and 53, the movable iron core 42 returns to the original position. At the time of return, the shock-absorbing disc 48 mounted in the recess on the bottom surface of the movable iron core 42 collides with the adhesion-preventing metal sheet 49. The shock-absorbing disc 48 absorbs and reduces the impact force. To do.

  According to the present embodiment, two types of contact pressure coil springs 65 and leaf springs 66 are combined. For this reason, the spring load is changed in multiple stages and can easily follow the attractive force characteristic curve. Therefore, there is an advantage that the design becomes easy and the degree of freedom of design is widened.

In the present embodiment, the case where the annular auxiliary yoke 35 is a plane circle has been described, but it may be a plane square.
Further, the case where the annular auxiliary yoke 35 is prevented from coming off by the O-ring 36 has been described.

  As shown in FIGS. 9 to 15, the electromagnetic switching device according to the second embodiment is substantially the same as that of the first embodiment described above, with the difference being the mounting steps provided on the opposite side surfaces of the cover 70. The point is that the connectors 100 can be attached to the portions 80 and 80, respectively. The same parts are denoted by the same reference numerals and description thereof is omitted.

  In this embodiment, the connector 100 can be attached and connected to either of the mounting step portions 80, 80 provided on both side surfaces of the cover 70. For example, as shown in FIG. 9, after connecting the external connector 110 to the connector 100, the lead wire 33a is routed to the back side of the case 10, and the connector 100 is positioned and slid to the mounting step 80 formed on the back side. It may be prevented from coming off by moving and locking the locking projection 103 to the elastic arm portion 81.

  Moreover, as shown in FIG. 12, after attaching the connector 100 to the mounting step 80 on the back side in advance, the external connector 110 may be fitted and connected to the connector 100 as a matter of course. Others are the same as in the first embodiment described above, and a description thereof will be omitted.

  Although this embodiment demonstrated the case where it applied to the electromagnetic relay for power loads, it is needless to say that it may apply not only to this but to another electric equipment.

1A and 1B are perspective views showing a first embodiment of a power load electromagnetic relay to which an electromagnetic switching device according to the present invention is applied. It is a perspective view which shows the after connection of the electromagnetic relay for power loads shown in FIG. 3A and 3B are perspective views for explaining different connection methods of the power load electromagnetic relay shown in FIG. 4A and 4B are a front view and a rear view of the power load electromagnetic relay shown in FIG. 5A and 5B are a right side view and a left side view of the power load electromagnetic relay shown in FIG. 6A and 6B are a plan view and a bottom view of the power load electromagnetic relay shown in FIG. It is front sectional drawing of the electromagnetic relay for power loads shown in FIG. It is side surface sectional drawing of the electromagnetic relay for power loads shown in FIG. 9A and 9B are perspective views showing a second embodiment of a power load electromagnetic relay to which the electromagnetic switching device according to the present invention is applied. 10A and 10B are perspective views for explaining a connection method of the power load electromagnetic relay shown in FIG. 11A and 11B are perspective views showing the power load electromagnetic relay shown in FIG. 9 after being connected. 12A and 12B are perspective views for explaining different connection methods of the power load electromagnetic relay shown in FIG. 13A and 13B are a front view and a rear view of the electromagnetic relay for power load shown in FIG. 14A and 14B are a right side view and a left side view of the power load electromagnetic relay shown in FIG. 15A and 15B are a plan view and a bottom view of the power load electromagnetic relay shown in FIG.

Explanation of symbols

10: Case 20: Drive mechanism unit 30: Electromagnet block 32: Coil 33a: Lead wire 50: Contact mechanism unit 60: Movable contact block 70: Cover 80: Mounting step portion 81: Elastic arm portion 82: Guide wall 83: Position restricting claw part 100: Connector 101: Guide groove part 102: Retaining frame part 103: Locking protrusion 104: Elastic tongue piece 110: External connector 111: Lead wire 112: Guide protrusion 113: Positioning protrusion 114: Locking projection 115: Elastic tongue

Claims (3)

An electromagnetic switching device connected to an electromagnetic coil and connected to an external circuit via an external connector fitted to the connector, with a connector connected to the tip of a lead wire drawn out from the housing,
An electromagnetic switching device, wherein the connector is detachably mounted by sliding it from the side to a mounting step formed on at least one side surface of the housing.   The electromagnetic switching device according to claim 1, wherein mounting step portions are respectively formed on opposite side surfaces of the housing.   2. An elastic arm portion for removably preventing a connector from being detached from the housing, wherein the elastic arm portion protrudes perpendicularly to the mounting direction of the connector and parallel to the mounting step. Or the electromagnetic switchgear of 2.

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