JP2011249138A - Remote control relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote control relay which stabilizes a spring load of a contact pressure spring and also improves the workability of assembly work.SOLUTION: The remote control relay comprises: an electromagnetic device in which a plunger is moved forward/backward in accordance with energization to a coil; and an interlocking lever 32 supported freely rotatably centering on an axis pin provided at a home position, and connected to the plunger at a position different from the axis pin to rotate around the axis pin in accordance with the forward/backward movement of the plunger. A movable contact 40 is held by the interlocking lever 32 to rotate together with the interlocking lever 32. The interlocking lever 32 is provided with a spring reception part 38 that holds one end side of a contact pressure spring 35 composed of a coil spring, and the other end side of the contact pressure spring 35 is held by the movable contact 40. The spring reception part 38 is provided with a protrusion 38a that is inserted into winding of the contact pressure spring 35, and ribs 38b and 38b that are brought into contact with an outer circumferential part of the contact pressure spring 35 from both upper and lower sides to regulate the movement of the contact pressure spring 35.

Description

  The present invention relates to a remote control relay.

  Conventionally, for example, a latching type remote control relay as disclosed in Patent Document 1 has been provided.

  This remote control relay has a one-winding type coil, a polarized electromagnet in which the plunger advances and retreats according to the energization direction of the coil, and an opening / closing mechanism that switches on / off of the contact portion according to the advance / retreat operation of the plunger It has.

  FIG. 8C shows a main part of the opening / closing mechanism, and the opening / closing mechanism oscillates the movable contact 40 in accordance with the advancement / retraction of the plunger 27 and the interlocking lever 32 that opens / closes the contact r1. And a pressure spring 35.

  Here, the contact portion r <b> 1 includes a fixed contact 51 fixed to the fixed terminal plate 50 fixed to the case, and a movable contact 41 fixed to the lower end portion of the movable contact 40.

  The interlocking lever 32 is made of an insulating synthetic resin molded product, and the shaft pin 33 attached to the tip of the plunger 27 is inserted into the shaft hole 32b of the main body 32a, so that the tip of the plunger 27 is rotatable. It is connected. The interlocking lever 32 is inserted into a shaft hole 32e provided in an intermediate portion of the main body 32a by inserting a shaft pin (not shown) held in a coil frame (not shown) of a polarized electromagnet. The frame is rotatably supported. Therefore, the interlock lever 32 swings about the shaft pin inserted into the shaft hole 32e by the plunger 27 moving forward and backward in the left-right direction in FIG. 8C according to the energization direction of the coil. .

  As shown in FIG. 8C, a movable contact 40 made of a long sheet metal is disposed on the left side of the main body portion 32a of the interlocking lever 32, and a substantially co-opening surface facing the movable contact 40 is opened. A mold spring receiving portion 38 is provided integrally with the main body portion 32a. The spring receiving portion 38 holds one end portion of the contact pressure spring 35 made of a coil spring. The other end of the contact pressure spring 35 is in contact with the movable contact 40 inserted between the main body 32 a and the spring receiving portion 38. The spring receiving portion 38 is provided with a protrusion 38 a that is inserted into one end portion of the contact pressure spring 35.

  The movable contact 40 is made of a long sheet metal, and a movable contact 41 is fixed to one end (lower end) in the longitudinal direction, and a connecting wire (not shown) made of a braided copper wire is connected to the other end (upper end). ) Is connected at one end. In addition, a protrusion (not shown) serving as a spring seat for the contact pressure spring 35 is provided in the longitudinal middle portion of the movable contact 40, and the positioning protrusion of the interlocking lever 32 is provided below the protrusion. A through hole (not shown) into which 32c is inserted is provided.

  The interlocking lever 32 is provided with a fulcrum protrusion 32d on the side of the positioning protrusion 32c, the surface of which is curved and with which the movable contact 40 comes into contact. The movable contact 40 comes into contact with the fulcrum protrusion 32d. ing.

  Here, when the coil is energized in a direction in which the plunger 27 protrudes to the left in FIG. 8C, the interlocking lever 32 rotates clockwise around the shaft hole 32e as the plunger 27 protrudes. The movable contact 41 contacts the fixed contact 51. Here, the movable contact 40 is in contact with the fulcrum protrusion 32d, and a force that rotates clockwise around the fulcrum protrusion 32d is applied by the contact pressure spring 35. Therefore, the movable contact 41 contacts the fixed contact 51. Pressure is obtained by the contact pressure spring 35.

  On the other hand, when the coil is energized in such a direction that the plunger 27 moves backward to the right in FIG. 8C, the interlocking lever 32 rotates counterclockwise in FIG. 8 around the shaft hole 32e as the plunger 27 moves backward. The movable contact 41 is separated from the fixed contact 51.

JP 2002-110013 A

  In the interlocking lever 32 used in the remote control relay having the above-described configuration, one end portion of the contact pressure spring 35 for obtaining contact pressure is held by the spring receiving portion 38. Here, the spring receiving portion 38 is provided with a protrusion 38a. By inserting the protrusion 38a into one end portion of the contact pressure spring 35 made of a coil spring, one end portion of the contact pressure spring 35 is held by the spring receiving portion 38. ing.

  Here, as shown in FIG. 8D, since the size of the protrusion 38a is smaller than the inner diameter of the contact pressure spring 35, a gap is generated between the coil wire of the contact pressure spring 35 and the protrusion 38a. One end side of the contact pressure spring 35 can move in the vertical direction D1 and the width direction D2 by the amount of the gap.

  Therefore, there is a possibility that the position of one end of the contact pressure spring 35 is shifted according to the advance / retreat operation of the plunger 27. If the position of one end of the contact pressure spring 35 is shifted, the spring load may fluctuate or may stop at an intermediate position, and the opening / closing life may be shortened due to the occurrence of contact bounce. In addition, when assembling the remote control relay, one end side of the contact pressure spring 35 may move and come off from the spring receiving portion 38, which causes a problem that the assembling work is difficult.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a remote control relay in which the spring load by the contact pressure spring is stabilized and the workability of the assembly work is improved. is there.

  In order to solve the above problems, a remote control relay of the present invention includes an electromagnet device, an interlocking lever, a movable contact, a fixed contact, and a contact pressure spring. The electromagnet device advances and retracts the plunger in response to energization of the coil. The interlocking lever rotates according to the advance / retreat of the plunger. The movable contact has a movable contact, is held by the interlocking lever, and rotates together with the interlocking lever. The fixed contact contacts or separates from the movable contact according to the rotation of the movable contact. The contact pressure spring is composed of a coil spring, and one end side is held by a spring receiving portion provided integrally with the interlocking lever, and the other end side is held by a movable contact to apply a contact pressure at the time of closing. The spring receiving portion is provided with a position restricting portion that abuts on the outer peripheral portion of the contact pressure spring and restricts the movement of the contact pressure spring. The remote control relay of the present invention comprises the above-described components.

  In this remote control relay, it is also preferable that the position restricting portion is composed of two ribs that come into contact with the outer peripheral portion of the contact pressure spring from both sides within the rotation surface of the movable contact.

  Moreover, in this remote control relay, it is also preferable that the position restricting portion is configured by ribs that come into contact with the outer peripheral portion of the contact pressure spring from both sides in two directions orthogonal to each other.

  In this remote control relay, it is also preferable that a protrusion that is inserted into the winding of the contact pressure spring and positions one end side of the contact pressure spring is provided on the spring receiving portion.

  According to the present invention, since the movement of the contact pressure spring is restricted by the position restricting portion coming into contact with the outer peripheral portion of the contact pressure spring, it is possible to suppress the position of the one end side of the contact pressure spring from being shifted. The spring load by the contact pressure spring is stabilized, and the workability of the assembly work can be improved.

(A) is a side view of an interlocking lever used in the remote control relay of this embodiment, (b) is a cross-sectional view taken along line AA, (c) is a side view of a state in which a movable contact is held by the interlocking lever, (d ) Is a BB cross-sectional view. It is a disassembled perspective view of a remote control relay same as the above. It is a side view of the remote control relay same as above, with the cover removed. It is a disassembled perspective view of the polarized electromagnet used for a remote control relay same as the above. (A) is a side view of another interlocking lever used for the above-described remote control relay, (b) is a cross-sectional view taken along the line AA, (c) is a side view of a state in which a movable contact is held by the interlocking lever, (d ) Is a BB cross-sectional view. (A) is a schematic block diagram of the remote monitoring and control system using a remote control relay same as the above, (b) is an internal circuit diagram of the remote control relay. It is explanatory drawing of the transmission signal used for the remote monitoring control system same as the above. (A) is a side view of an interlocking lever used in a conventional remote control relay, (b) is a cross-sectional view taken along line AA, (c) is a side view of the interlocking lever holding a movable contact, and (d) is a side view. It is BB sectional drawing.

  An embodiment in which the technical idea of the present invention is applied to a latching type remote control relay used in a remote monitoring control system will be described with reference to FIGS. In the following description, the vertical and horizontal directions are defined in the direction shown in FIG. 3 unless otherwise specified.

  FIG. 2 is an exploded perspective view of the remote control relay 1. The case 10 of the remote control relay 1 is set to one module size (unit size) standardized as a distribution board agreement size. The case 10 includes a body 11 made of a substantially box-shaped synthetic resin molded product having an opening in one width direction, and a cover 12 made of a synthetic resin molded product covering the opening of the body 11. A plurality of assembly holes 13 and 14 are formed in the body 11 and the cover 12, respectively. The caulking pins 15 are inserted into the assembly holes 13 and 14 from the cover 12 side, and the end portions of the caulking pins 15 projecting to the side surface of the body 11 opposite to the cover 12 are caulked to thereby form the body 11 and the cover 12. And are combined.

  As shown in FIGS. 2 and 3, inside the case 10, there is a polarized electromagnet 20 (electromagnet device) in which the plunger advances / retreats (advances or reverses) in response to energization of the coil, and according to the advance / retreat operation of the plunger. An opening / closing mechanism unit 70 for switching on / off of the contact unit is accommodated.

  As shown in FIGS. 2 to 4, the polarized electromagnet 20 includes a coil 25, a coil frame 26, a plunger 27, armatures 28 a and 28 b, a sequential plate 29, a yoke 30, a permanent magnet 23, 23 and auxiliary yokes 24 and 24 are provided as main components.

  The yoke 30 has a rectangular tube shape as a whole, and is composed of two divided yokes 31A and 31B that are divided into two in the forward / backward direction of the plunger 27 (left and right direction in FIG. 3). The two divided yokes 31A and 31B are formed in the same shape with a magnetic material, and are composed of a rectangular plate-shaped central piece 31a and leg pieces 31b and 31b protruding in one direction from both side edges of the central piece 31a. It is formed in a substantially U shape. The central piece 31a of each divided yoke 31A, 31B is provided with an insertion hole 31c into which the front end side or the rear end side of the plunger 27 is inserted. The two divided yokes 31A and 31B are arranged in the advancing and retreating direction of the plunger 27 so that the tip surfaces of the leg pieces 31b face each other with a predetermined gap therebetween, and form a square cylinder as a whole. One magnetic pole of the permanent magnet 23 is in contact with the inner side surfaces of the leg pieces 31b, 31b of both divided yokes 31A, 31B so as to straddle the two divided yokes 31A, 31B. The other magnetic pole of the permanent magnet 23 is in contact with one surface of the auxiliary yoke 24 formed in a substantially plate shape with a magnetic material.

  The two auxiliary yokes 24 are arranged so as to surround the coil 25 wound around the coil frame 26 from both the upper and lower sides. The coil frame 26 is made of an insulating material, and has a cylindrical winding body portion 26a around which the coil 25 is wound, plate-like flange portions 26b provided at both axial ends of the winding body portion 26a, and both flange portions 26b. The plate-shaped side part 26c which protrudes on the opposite side to the winding drum part 26a from the both-sides edge along the up-down direction is provided. A plunger 27 made of a magnetic material is inserted into the cylinder of the winding body portion 26a so as to be able to advance and retract in the axial direction of the coil frame 26. Both end portions of the plunger 27 are narrower than the center portion, and the left and right end portions of the plunger 27 are press-fitted into the fitting holes of the armatures 28a and 28b formed in a rectangular plate shape from a magnetic material. Thus, the armatures 28 a and 28 b are caulked and fixed to both ends of the plunger 27. The armature 28a abuts against the central piece 31a of the left split yoke 31A when the plunger 27 moves forward, thereby restricting the range of movement of the plunger 27 forward (left side in FIG. 1). At this time, since the other armature 28b is in contact with the auxiliary yoke 24, a closed magnetic path is formed in the path of the armature 28a-yoke 30-permanent magnet 23-auxiliary yoke 24-armature 28b-plunger 27. The plunger 27 is held in that position. The armature 28b abuts against the central piece 31a of the right split yoke 31B when the plunger 27 moves backward, thereby restricting the range of movement of the plunger 27 to the rear (right side in FIG. 1). At this time, the other armature 28a is opposed to the left end portion of the auxiliary yoke 24 through a small gap, and is closed by a path of the armature 28b-yoke 30-permanent magnet 23-auxiliary yoke 24-armature 28a-plunger 27. Since a path is formed, the plunger 27 is held in that position.

  Here, the coil 25 is a single-winding type, and the plunger 27 moves forward or backward depending on the energization direction to the coil 25. When the plunger 27 moves forward or backward to a position where the armature 28a or 28b contacts the yoke 30, the plunger 27 is held at the stop position by the magnetic force of the permanent magnet 23 even if the energization to the coil 25 is stopped. is there.

  As shown in FIG. 2, the polarized electromagnet 20 is disposed between partition pieces 11 a and 11 b that protrude from the surface of the body 11 that faces the cover 12. A buffer spring 16 made of a leaf spring is attached between the polarized electromagnet 20 and the partition piece 11b, and the polarized electromagnet 20 is stored while being pressed against the partition piece 11a. Therefore, the poled electromagnet 20 is positioned by the buffer spring 16 and the vibration associated with the advance / retreat of the plunger 27 is alleviated by the buffer spring 16.

  Next, the opening / closing mechanism unit 70 that switches on / off of the contact unit r <b> 1 described later according to the forward or backward operation of the plunger 27 provided in the polarized electromagnet 20 will be described.

  The opening / closing mechanism 70 includes an interlocking lever 32 that rotates in accordance with the advance / retreat of the plunger 27, a contact pressure spring 35, and a switching circuit block 60 as main components.

  The interlocking lever 32 is made of an insulating synthetic resin molded product, and as shown in FIGS. 1 and 3, the shaft pin 33 attached to the distal end portion (left end portion in FIG. 3) of the plunger 27 is connected to the shaft hole of the main body portion 32a. By being inserted into 32b, it is rotatably connected to the tip of the plunger 27. The interlocking lever 32 is rotatable to the coil frame 26 by inserting a shaft pin 34 passed through a pair of support pieces 26d provided in the coil frame 26 into a shaft hole 32e provided in an intermediate portion of the main body 32a. Supported by Here, the shaft pins 33 and 34 are parallel to each other, and the interlocking lever 32 swings around the shaft pin 34 when the plunger 27 moves forward or backward.

  As shown in FIGS. 1C and 3, a movable contact 40 is arranged on the left side of the main body 32 a of the interlocking lever 32. The movable contact 40 is held by the interlocking lever 32 and rotates together with the interlocking lever 32 according to the rotation operation of the interlocking lever 32. The movable contact 40 is made of a long sheet metal, and a movable contact 41 is fixed to one end (lower end) in the longitudinal direction, and one end of a connection wire 42 made of a braided copper wire is attached to the other end (upper end). It is connected. The other end of the connection line 42 is connected to a terminal plate 43 fixed to the case 10. A terminal screw 44 with a washer is attached to the terminal plate 43, and this terminal screw 44 is exposed to the outside of the case 10.

  The body portion 32a of the interlocking lever 32 is integrally provided with a substantially U-shaped spring receiving portion 38 having an opening surface facing the movable contact 40. The spring receiving portion 38 holds one end side of a contact pressure spring 35 made of a coil spring, and the other end side of the contact pressure spring 35 is a movable contact 40 inserted between the main body portion 32 a and the spring receiving portion 38. To touch. Here, the spring receiving portion 38 is provided with a protrusion 38 a that is inserted into the winding on one end side of the contact pressure spring 35 on the surface facing the movable contact 40. Further, ribs 38b and 38b are provided on the surface of the spring receiving portion 38 facing the movable contact 40 at positions where the outer peripheral portion of the contact pressure spring 35 abuts from both sides in the vertical direction. In addition, a protrusion 40a serving as a spring seat for the contact pressure spring 35 is provided at an intermediate portion in the longitudinal direction of the movable contact 40, and a positioning protrusion 32c of the interlocking lever 32 is inserted below the protrusion 40a. A through hole (not shown) is provided. The interlocking lever 32 is provided with a fulcrum protrusion 32d on the side of the positioning protrusion 32c, the surface of which is curved and with which the movable contact 40 comes into contact. The movable contact 40 comes into contact with the fulcrum protrusion 32d. .

  Thus, when the contact pressure spring 35 is held between the movable contact 40 held by the main body portion 32 a and the spring receiving portion 38, the protrusions 40 a of the movable contact 40 are formed at both ends of the contact pressure spring 35. The protrusion 38a of the spring receiving portion 38 is inserted, and the contact pressure spring 35 is prevented from falling off or coming off. In addition, since the ribs 38b and 38b are in contact with the outer peripheral portion on one end side of the contact pressure spring 35 from both sides in the vertical direction, it is possible to suppress the position on the one end side of the contact pressure spring 35 from fluctuating in the vertical direction.

  A display piece 36 facing the display window 10 a that opens in the case 10 is integrally provided at the upper end of the interlocking lever 32. When the interlocking lever 32 rotates according to the forward / backward movement of the plunger 27, the part of the display piece 36 exposed from the display window 10a changes. For example, characters such as “ON” are written on the portion of the display piece 36 exposed from the display window 10a when the contact portion r1 is turned on, and for example, the portion of the display piece 36 exposed from the display window 10a when the contact portion r1 is turned off. Characters such as “OFF” are written. Further, an operation groove 36a is formed in a portion of the display piece 36 between the characters “ON” and “OFF” and is always exposed from the display window 10a. Thus, the interlock lever 32 can be manually swung from the outside of the case 10 by inserting a tool such as the tip of the driver into the display window 10a and engaging with the operation groove 36a. The contact portion r1 can be opened and closed according to manual operation.

  The fixed contact 51 facing the movable contact 41 is fixed to one end of the fixed terminal plate 50 attached to the body 11, and contacts or separates from the movable contact 41 according to the rotation of the movable contact 40. The other end of the fixed terminal plate 50 is exposed to the outside of the case 10, and a terminal screw 52 with a washer is attached to this exposed portion. Here, the movable contact 41 and the fixed contact 51 constitute a contact portion r1, and the remote control relay 1 of this embodiment includes a one-pole contact portion r1. The terminal plate 43 and the fixed terminal plate 50 are stored side by side in the width direction of the case 10, and a partition wall 18 made of an insulating synthetic resin is attached between the terminal plate 43 and the fixed terminal plate 50. Inter-insulation is secured.

  By the way, since the coil 25 of the polarized electromagnet 20 described above is a one-winding type, in order to move the plunger 27 forward and backward, it is necessary to reverse the energization direction to the coil 25. Therefore, as shown in FIG. 6B, the coil 25 is connected to the switching contact r2 for selectively selecting two types of power feeding paths, and each of the power feeding paths selected by the switching contact r2 has a reverse flow. Diodes D1 and D2 as blocking elements are connected. Terminals opposite to the switching contact r2 in the diodes D1 and D2 are commonly connected. The diodes D1 and D2 are connected in a relationship in which currents passing through the respective power supply paths are opposite to each other, and if current flows in the direction of the switching contact r2 → coil 25 in one power supply path, the coil in the other power supply path 25 → Current flows in the direction of the switching contact r2. A differential circuit for reset, which is a series circuit of a capacitor C and a resistor R, is connected between the anode of one diode D2 and the common contact of the switching contact r2. With this circuit configuration, by switching the energization direction of the polarized electromagnet 20 to the coil 25, the contact portion r1 composed of the movable contact 41 and the fixed contact 51 can be opened and closed.

  Since the energizing direction to the coil 25 is selected by the switching contact r2 as described above, the switching contact r2 is set to the plunger so that the energizing direction is selected so that the advance / retreat position of the plunger 27 is reversed when the coil 25 is energized. It is necessary to switch according to the advance / retreat of 27. That is, it is necessary to interlock the advance / retreat of the plunger 27 and the switching contact r2. Therefore, in the remote control relay 1, a contact operating piece 37 is provided on the interlocking lever 32, and the switching operation of the switching contact r2 is performed by the contact operating piece 37.

  In the switching circuit block 60 having the switching contact r2 and the switching circuit, the switching contact r2 and the switching circuit of the switching contact r2 are formed on the base 61 of the resin molded product placed on the upper surface of the polarized electromagnet 20. A contact board (not shown) is held. Two fixed contact plates 63a and 63b and movable contact plates 64a and 64b facing the fixed contact plates 63a and 63b are attached to the base 61, respectively. A cutout 61a is provided in the peripheral portion of the base 61, and the base 61 is attached by heat-bonding both of them with the rib 26f protruding upward from the coil frame 26 engaged with the cutout 61a. It is fixed to the coil frame 26. The movable contact plates 64a and 64b are respectively provided on both leg pieces of the substantially U-shaped contact support plate 64, and have a spring force in a direction to contact the corresponding fixed contact plates 63a and 63b. Here, the contact operating piece 37 of the interlocking lever 32 is inserted between the movable contact plates 64a and 64b. When the interlocking lever 32 swings as the plunger 27 advances and retreats, the movable contact plates 64a and 64b are pushed by the contact operating piece 37 at the forward and backward positions of the interlocking lever 32, and the fixed contact The energization direction is switched away from the plates 63a and 63b.

  A pair of coil terminal plates 65 is attached to the base 61, and each coil terminal plate 65 is provided with a terminal screw 66 with a washer. Therefore, when an external signal input through the coil terminal plate 65 is received and the coil 25 is energized, the plunger 27 advances and retreats according to the energization direction.

  Next, the operation of the remote control relay 1 will be described. First, when the coil 25 is energized in a direction in which the plunger 27 protrudes forward (left side in FIG. 3), the interlocking lever 32 is rotated clockwise in FIG. The movable contact 41 contacts the fixed contact 51 by rotating. Here, as shown in FIGS. 1C and 3, the movable contact 40 abuts against the fulcrum protrusion 32 d, and a force that rotates clockwise around the fulcrum protrusion 32 d is applied by the contact pressure spring 35. Therefore, the contact pressure of the movable contact 41 with respect to the fixed contact 51 is obtained. As the interlocking lever 32 rotates, the movable contact plate 64b is pushed by the contact operating piece 37, so that the movable contact plate 64b is separated from the fixed contact plate 63b. At this time, since only the direction in which the plunger 27 is moved backward is permitted as the energization direction to the coil 25, the energization to the coil 25 is stopped, but the contact portion r1 is closed by the magnetic force of the permanent magnet 23. State is maintained.

  On the other hand, when the energizing direction of the coil 25 is reversed, the plunger 27 moves backward, that is, moves to the right side in FIG. 3, and the interlocking lever 32 rotates about the shaft pin 33 counterclockwise in FIG. The movable contact 41 is separated from the fixed contact 51 and the contact portion r1 is opened. As the interlocking lever 32 rotates, the movable contact plate 64a is pushed by the contact operating piece 37, so that the movable contact plate 64a is separated from the fixed contact plate 63a. At this time, since only the direction in which the plunger 27 is advanced is permitted as the energization direction to the coil 25, the energization to the coil 25 is stopped, but the contact portion r1 is opened by the magnetic force of the permanent magnet 23. State is maintained.

  As described above, the remote control relay 1 is held by the polarized electromagnet 20 in which the plunger 27 advances and retreats in response to energization of the coil 25, the interlocking lever 32 that rotates in accordance with the advancement and retraction of the plunger 27, and the interlocking lever 32. A movable contact 40 that rotates together with the interlocking lever 32 is provided. The interlocking lever 32 is integrally provided with a spring receiving portion 38 that holds one end side of a contact pressure spring 35 that applies contact pressure when the contact is closed, and the other end side of the contact pressure spring 35 is connected to the movable contact 40. Is retained. The spring receiving portion 38 is provided with a rib 38 b (position restricting portion) that abuts on the outer peripheral portion of the contact pressure spring 35 and restricts the movement of the contact pressure spring 35.

  Thereby, since the rib 38b contacts the outer peripheral portion of the contact pressure spring 35 and the movement of the contact pressure spring 35 is restricted, it is possible to suppress the position of one end side of the contact pressure spring 35 from shifting. Therefore, the spring load by the contact pressure spring 35 is stabilized, and the displacement of the contact pressure spring 35 is suppressed during assembly, so that the workability of the assembly work can be improved.

  Further, in the present embodiment, the spring receiving portion 38 is provided with a protrusion 38a inserted into the winding of the contact pressure spring 35 in addition to the rib 38b constituting the position restricting portion.

  Thus, by inserting the protrusion 38a into the winding of the contact pressure spring 35, there is an effect that the contact pressure spring 35 is less likely to drop off or come off.

  Further, in the present embodiment, as shown in FIG. 1B, the contact pressure spring 35 from both sides in the rotational direction (that is, the vertical direction) of the movable contact 40 on the surface of the spring receiving portion 38 facing the movable contact 40. Ribs 38b and 38b are respectively provided at positions in contact with the outer periphery of the plate.

  Therefore, since the ribs 38b and 38b abut against the outer peripheral portion of the contact pressure spring 35 from both sides in the rotational direction (up and down direction), the position of one end side of the contact pressure spring 35 is in the up and down direction (indicated by the arrow D1 in FIG. 1 (d)). Direction), that is, fluctuations in the rotational direction of the movable contact 40 can be suppressed. Therefore, even when the movable contact 40 rotates together with the interlocking lever 32 in accordance with the advancement / retraction of the plunger 27, the position of the one end side of the contact spring 35 becomes difficult to shift, and the spring load by the contact pressure spring 35 can be stabilized. The position on one end side of the contact pressure spring 35 is not positioned in the direction orthogonal to the direction of the arrow D1 (the left-right direction in FIG. 1D), but is different from the rotational direction of the movable contact 40. In this direction, the position of the one end side of the contact pressure spring 35 is considered to be difficult to shift. Further, since the rib 38b extends in the left-right direction (the direction of the arrow D2) in FIG. 1D, when the interlocking lever 32 is resin-molded, if the mold is separated in the direction of the arrow D2, It is not necessary to use a slide core to produce the rib 38b, and the mold processing becomes easy.

  Incidentally, as shown in FIGS. 5A to 5D, in addition to the ribs 38b and 38b described above, the left and right direction (indicated by the arrow D2 in the figure) is formed on the surface of the spring receiving portion 38 facing the movable contact 40. It is also preferable that ribs 38c, 38c that contact the outer peripheral portion of the contact pressure spring 35 from both sides of the direction) are provided. Here, the ribs 38b and 38b are in contact with the outer peripheral portion of the contact pressure spring 35 from both sides in the vertical direction (that is, the rotational direction of the movable contact 40) D1. Therefore, each of the two ribs 38b and 38c comes into contact with the outer peripheral portion of the contact pressure spring 35 from both sides in two directions D1 and D2 orthogonal to each other.

  As described above, the ribs 38b and 38c come into contact with the outer peripheral portion on one end side of the contact pressure spring 35 from four directions, so that the displacement of the one end side of the contact pressure spring 35 can be further suppressed, and the spring load by the contact pressure spring 35 can be further increased. It can be stabilized.

  In the above embodiment, ribs 38b and 38c that extend linearly are provided as position restricting portions that contact the outer peripheral portion of the contact pressure spring 35. However, as shown in FIG. A plurality of the portions 38d may be formed along the outer peripheral portion of the contact pressure spring 35 at regular intervals. Also in this case, the protrusion 38d abuts on the outer peripheral portion of the contact pressure spring 35, so that the displacement of the contact pressure spring 35 is restricted, and the spring load by the contact pressure spring 35 can be stabilized. Further, in the above embodiment, in addition to the ribs 38b, 38c or the protrusion 38d as the position restricting portion, the protrusion 38a inserted into the winding of the contact pressure spring 35 is provided in the spring receiving portion 38. 38a may be eliminated and only the position restricting portion may be provided.

  Next, a remote monitoring control system in which the above-described remote control relay 1 is used will be described with reference to FIG. 6 (a) and FIG.

  FIG. 6A is a schematic system configuration diagram of the remote monitoring control system. In this system, a transmission unit 100, an operation terminal 101 for monitoring the state of the operation switches SW1 and SW2, and a load 104 such as a lighting fixture are connected to the 2-wire transmission line L1 by the remote control relay 1 described above. A control terminal 102 that controls power feeding is connected. Here, reference numeral 103 in FIG. 6A denotes a power transformer for driving the relay. In the system configuration diagram of FIG. 6A, only one operation terminal 101 and one control terminal 102 are connected, but the number of each of the terminals 101 and 102 depends on the scale of the system. Changes can be made as appropriate.

  In this remote monitoring and control system, data is exchanged with each of the terminals 101 and 102 by sending a transmission signal Vs having a format as shown in FIG. The transmission signal Vs returns a return signal from the start pulse ST, the mode data MD indicating the signal mode, the address data AD, the control data CD indicating the control content of the load 104, the error correction code CS, and the terminals 101 and 102. A return waiting period WT. This transmission signal Vs is a bipolar (± 24V) time division multiplexed signal, and data is transmitted by pulse width modulation.

  In each of the terminals 101 and 102, when the address included in the address data AD of the transmission signal Vs received via the two-wire transmission line L1 matches the preset own address, the transmission signal The control data CD of Vs is fetched. Further, each terminal 101, 102, when the received transmission signal Vs is addressed to itself, sends the return signal to the current mode signal (appropriately low between the transmission lines L1) in synchronization with the return waiting period WT of the transmission signal Vs. The signal is sent back as a short circuit via impedance.

  In the operation terminal 101, when the operation switches SW1 and SW2 to be monitored are operated, in synchronization with the start pulse ST of the transmission signal Vs (see FIG. 7B) transmitted at the normal time, As shown in c), the interrupt signal Vi is sent out in the current mode.

  That is, the transmission unit 100 includes a signal transmission unit and an interrupt processing unit. The transmission unit 100 constantly transmits a transmission signal Vs having a target terminal device or dummy address data AD that is constantly monitored in the polling mode by the signal transmission unit. Send it out. When the interrupt signal Vi is received in the polling mode, the interrupt processing means of the transmission unit 100 sequentially transmits the transmission signal Vs having the group address and detects the operation terminal 101 that has transmitted the interrupt signal Vi. The group address is an address used for identifying the operation terminal 101 in units of groups.

  The operating terminal 101 that has sent the interrupt signal Vi returns its own address as a return signal during the return waiting period WT when accessing the group address to which it belongs. The transmission unit 100 that has received the return signal identifies the operation terminal 101 that has generated the interrupt signal Vi based on the address data that has been sent. When the interrupted terminal device is specified, the transmission unit 100 sends out a transmission signal Vs for accessing the operation terminal device 101, and the operation switch SW1... The operation data is returned as monitoring data.

  When the transmission unit 100 receives the monitoring data through a series of interrupt processing, the transmission unit 100 creates control data CD for the control terminal 102 associated with the operation terminal 101 in advance based on the monitoring data. Then, the transmission unit 100 time-division multiplex-transmits the created control data CD together with the address data AD of the control terminal 102 using the transmission signal Vs. The control terminal 102 accessed by the transmission signal Vs controls and drives the remote control relay 1 according to the control content of the control data CD, and turns on / off the power supply to the load 104 by the relay contact.

  In this way, in the remote monitoring control system, the power supply to the load 104 is turned on / off by the corresponding control terminal 102 via the remote control relay 1 in accordance with the operation of the operation switch SW1 of the operation terminal 101. Can do it.

1 Remote control relay 20 Polarized electromagnet (electromagnet device)
25 Coil 27 Plunger 32 Interlocking lever 33, 34 Shaft pin 35 Contact pressure spring 38 Spring receiving portion 38a Protrusion 38b, 38c Rib (position regulating portion)
38d Protruding part (position regulating part)
40 movable contact 41 movable contact 51 fixed contact

Claims (4)

An electromagnet device in which the plunger advances and retreats in response to energization of the coil;
An interlocking lever that rotates in accordance with advancement and retraction of the plunger;
A movable contact which has a movable contact and is held by the interlocking lever and rotates together with the interlocking lever;
A fixed contact that contacts or separates from the movable contact according to the rotation of the movable contact;
A spring comprising a coil spring, one end of which is held by a spring receiving portion provided integrally with the interlocking lever, and the other end of which is held by the movable contact, and is provided with a contact pressure spring that applies a contact pressure at the time of closing. ,
The remote control relay according to claim 1, wherein the spring receiving portion is provided with a position restricting portion that abuts on an outer peripheral portion of the contact pressure spring to restrict movement of the contact pressure spring.   2. The remote control relay according to claim 1, wherein the position restricting portion includes two ribs that come into contact with an outer peripheral portion of the contact pressure spring from both sides within a rotation surface of the movable contact.   The remote control relay according to claim 1, wherein the position restricting portion is configured by ribs that come into contact with the outer peripheral portion of the contact pressure spring from both sides in two directions orthogonal to each other.   4. The projection according to claim 1, wherein a projection inserted into the winding of the contact pressure spring and positioning one end side of the contact pressure spring is provided on the spring receiving portion. 5. The remote control relay described.

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