JPH06203721A - Two-polar remote control relay - Google Patents

Abstract

PURPOSE:To provide a two-polar remote control relay which has a high operating sensitivity and is capable of being constructed in a small size by reducing the number of components used. CONSTITUTION:An interlocking lever 31 made of an insulating material is coupled with a plunger 27 of a polarized electromagnet 20 and swings rotationally round a shaft pin 33 in association with the advance and retreat of the plunger 27. The lever 31 is fitted with a partition plate 31a inserted between two movable contacting pieces 40. Rests 31d for contacting pieces 40 are furnished on both sides of this partition plate 31a. Because two contacting pieces 40 are held by one interlocking lever 31, it requires a small number of components, and the polarized electromagnet 20 can be configured with a small output. Also because partition plate of insulating material exists between the two movable contacting pieces 40, the insulating distance can be made large, and the device can be structured small despite its high withstand voltage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-pole remote control relay.

[0002]

2. Description of the Related Art Conventionally, a polar electromagnet has been provided in which a plunger is advanced and retracted by switching the energization direction to one coil, and a main contact is opened and closed as the plunger is advanced and retracted.
In addition, by reversing the polarity of the diode that is the backflow prevention element that is inserted in the feeding path to the coil as the plunger moves back and forth, the coil is allowed to energize only in the direction that causes the plunger to retract when the plunger projects, There is provided a two-pole remote control relay in which the energization of the coil is permitted only in the direction in which the plunger is projected when the device is retired. In this type of two-pole remote control relay, as shown in FIG. 10, an interlocking lever 31 'for holding each movable contactor 40 is provided for each movable contactor 40, and a shaft pin serving as a rotation center of the interlocking lever 31' is provided. 33 'is fixed at a fixed position with respect to the polar electromagnet 20, and a shaft pin 32' inserted into the plunger 27 of the polar electromagnet 20 is connected to both interlocking levers 31 '.

[0003]

In the above-mentioned conventional structure, the interlocking lever 31 'is provided for each movable contact 40.
Since it is held at, there is a problem that the number of parts is large.
That is, since the mass of the portion driven by the polar electromagnet 20 is relatively large, the polar electromagnet 20 needs to have a large output, which causes a problem that the operation sensitivity becomes low. In addition, since there is no means for insulating the movable contacts 40 from each other, the distance between the movable contacts 40 must be increased in order to increase the withstand voltage, which results in an increase in size. There is. Actually, the conventional two-pole remote control relay requires a case having a size twice as large as the unit size standardized as the distribution board agreement size.

An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a two-pole remote control relay which has a high operation sensitivity and can be miniaturized by reducing the number of parts. .

[0005]

In order to achieve the above-mentioned object, the present invention provides a polarized electromagnet having a one-winding type coil in which a plunger moves back and forth in accordance with the direction of energization to the coil, and a fixed electromagnet. It is rotatably supported around a metal shaft pin, is connected to the plunger at a position different from the shaft pin, and is held by the interlocking lever and an interlocking lever made of an insulating material that rotates around the shaft pin when the plunger moves back and forth. Two movable contactors each having a movable contact at one end, a fixed contact that separates from and comes into contact with each movable contact, and a power supply path to the coil that is inserted into the power supply path to the coil and interlocks with the forward / backward movement of the plunger. Remote control relay having a plurality of poles provided in a case with a switching contact selected from a path and a backflow prevention element for restricting directions of currents passing through respective power supply paths selected by the switching contact in opposite directions. The interlocking lever has a partition plate that is inserted between the movable contacts, and is integrally formed with contact holders that hold the movable contacts on both sides of the partition plate. Of.

Further, it is desirable that the case is set to a unit size standardized as a distribution board agreement size.

[0007]

According to the above construction, the interlocking lever which is connected to the plunger of the polar electromagnet and holds the movable contactor is provided with the partition plates inserted between the movable contactors, and the movable contactors are provided on both sides of the partition plate. Since the contactor holding portion that holds the movable contactor is integrally provided, one interlocking lever may be used to hold the two movable contactors. The number of parts is reduced compared to the case where it is provided. Therefore, as compared with the case where two interlocking levers are used, the output of the polar electromagnet can be reduced, and as a result, the polar electromagnet can be driven with a small amount of energy, resulting in high operation sensitivity. In addition, since a partition plate made of an insulating material is interposed between both movable contacts, the creepage distance is long,
If the withstand voltage is set to be the same as when two interlocking levers are used, the size can be reduced as a whole.

Further, since the size can be reduced as described above, it is possible to use a case having a unit size of the distribution board agreement size, and the width of the case is half (25 mm) as compared with the conventional configuration (50 mm). It is possible to

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall configuration of a remote control relay according to the present invention. The case 10 of the remote control relay is set to a module size (unit size) standardized as a distribution board agreement size, and covers a box-shaped body 11 having an open side surface and an opening surface of the body 11. And a cover 12. As shown in FIG. 2, the body 11 and the cover 12 are
Assembly holes 13, 1 formed in the body 11 and the cover 12
The caulking pin 15 is inserted into the connector 4, and the tip portion of the caulking pin 15 projecting to the side surface of the body 11 opposite to the cover 12 is caulked to be integrally connected. The case 10 is formed with an auxiliary space 16 (see FIG. 5) capable of accommodating parts for high functionality, and the peripheral surface of the case 10 corresponding to the auxiliary space 16 is open. Therefore, the closing plate 17 is attached so as to close the opening when a component for high functionality is not stored.

A polar electromagnet 20 is housed in the case 10. As shown in FIG. 5, the polar electromagnet 20 includes two yokes 21 formed in a substantially U shape, and the yokes 21 are arranged so as to face each other with a gap 22 between the front end surfaces of the leg pieces. . One magnetic pole of the permanent magnet 23 abuts on the central piece of the yoke 21, and the auxiliary yoke 24 is coupled to the other magnetic pole of the permanent magnet 23. The auxiliary yoke 24 is arranged so as to surround a coil frame 26 around which the coil 25 is wound, and a plunger 27 is inserted into the coil frame 26 so as to be movable back and forth in the axial direction of the coil frame 26. Further, the plunger 27 comes into contact with the yoke 21 or the auxiliary yoke 24 when advancing and retracting, restricts the movement range of the plunger 27, and forms a magnetic circuit.
A piece of armature 28 is fixed. The coil 25 is a one-winding type, and the plunger 27 moves forward and backward according to the direction of energization to the coil 25, and the plunger 27 is held at the stop position by the magnetic force of the permanent magnet 23. That is, at the stop position, a closed magnetic path of a path of permanent magnet 23-auxiliary yoke 24-armature 28-plunger 27-armature 28-yoke 21-permanent magnet 23 is formed and the plunger 27 is held at that position. is there. The yoke 2 at the armature 28
A contactless plate 28a made of a non-magnetic material is fixed to the contact surface with 1, so that the armature 28 can be easily separated from the state in which the armature 28 is attracted by the yoke 21. The polar electromagnet 20 is disposed between the partition pieces 11f and 11g provided on the surface of the body 11 facing the cover 12, and a buffer spring 19 made of a leaf spring is provided between the partition piece 11g and the polar electromagnet 20. By being sandwiched between them, the polar electromagnet 20
Is fixed to the partition 11f in a pressed form. Therefore, the polarized electromagnet 20 is fixed by the buffer spring 19, and the vibration caused by the forward / backward movement of the plunger 27 is alleviated by the buffer spring 19.

At one end of the plunger 27 in the forward / backward direction,
As shown in FIGS. 1, 3, 5, and 9, an interlocking lever 31 made of a synthetic resin that is an insulating material is rotatably coupled by a shaft pin 32. That is, a part of the plunger 27 is inserted into the concave groove 31b formed in the interlocking lever 31, and the plunger 27 is inserted into the bearing projection piece 31c protruding in the concave groove 31b by the shaft pin 32. Three
It is pivotally attached to 1c. Further, the interlocking lever 31 is pivotally supported by two shaft pins 33 that are inserted through a pair of support pieces 26a provided on the outer peripheral surface of the coil frame 26 of the polar electromagnet 20. Each shaft pin 33 is inserted into the interlocking lever 31 through the support piece 26a, and both shaft pins 33 are arranged in a straight line.
The length dimension is set so that the three do not contact each other. Inside the interlocking lever 31, a synthetic resin, which is a constituent material of the interlocking lever 31, exists between the both shaft pins 33, and the both shaft pins 33 are insulated. Shaft pin 32 and shaft pin 33
Are parallel to each other, and when the plunger 27 reciprocates, the interlocking lever 31 swings around the shaft pin 33. As described above, the fulcrum of the interlocking lever 31 is constituted by the two shaft pins 33, and a part of the interlocking lever 31 is interposed between the tips of the both shaft pins 33, so that the two shaft pins 33 are insulated from each other. It is.

The interlocking lever 31 has a partition plate 31a, and contactor holders 31d as contactor holders are integrally projected on the left and right side surfaces of the partition plate 31a. The groove 31b is formed. Partition plate 31a
A spring receiving projection 31e formed in a substantially U shape having an opening on the surface facing the contact holder 31d is also provided on both side surfaces of the spring support projection 31e. The spring receiving protrusion 31e holds one end of the contact pressure spring 34 formed of a coil spring. The other end of the contact pressure spring 34 makes elastic contact with the movable contactor 40 inserted between the contactor holder 31d and the spring receiving protrusion 31e. That is, the two movable contacts 40 are held by the single interlocking lever 31.

The movable contact 40 is in the form of a strip, and a movable contact 41 is fixed to one end in the longitudinal direction, and a terminal plate 43 is connected to the other end via a connecting wire 42 made of a braided copper wire. . A terminal screw 44 with a washer is screwed onto the terminal plate 43. In addition, a protrusion 45 serving as a seat for the contact pressure spring 34 is formed at an intermediate portion in the longitudinal direction of the movable contactor 40.
Positioning holes 46 are formed below 5. A positioning protrusion 35 protruding from the interlocking lever 31 is inserted into the positioning hole 46. The interlocking lever 31 is provided with a fulcrum protrusion 36 that is curved to the side of the positioning protrusion 35 and comes into contact with the movable contact 40. The movable contact 40 comes into contact with the fulcrum protrusion 36. There is. In the movable contact 40, a movable electromagnetic iron piece 47 is fixed to an end portion below the movable contact 41. At the upper end of the interlocking lever 31, as shown in FIG.
The display piece 38 facing 0a is integrally provided, and the characters "ON" and "OFF" are written on the display piece 38. Further, an operation groove 38a is formed in a portion between the characters "ON" and "OFF" on the display piece 38 and which is always exposed from the display window 10a, and a tool such as a tip of a driver is displayed. The interlocking lever 31 can be manually operated from the outside of the case 10 by inserting it into the window 10a and engaging with the operation groove 38a.

The fixed contact 51 facing the movable contact 41 is
The fixed terminal plate 50 is fixed to one end of a fixed terminal plate 50 formed by bending a conductive sheet metal and fixed to the case 10.
The other end of is exposed to the outside of the case 10. Fixed terminal board 5
Reference numeral 0 indicates a contact piece 52 extending downward from one end portion provided with a fixed contact 51 along the movable contact 40, and a fixed electromagnetic iron piece 53 is fixed to a lower end portion of the contact piece 52 so as to face the movable electromagnetic iron piece 47. Has been done. Further, a terminal screw 55 with a washer is screwed into the terminal piece 54 protruding to the outside of the case 10. Two movable contacts 40 and two fixed terminal plates 50 are housed in the case 10, so that the main contacts are configured with two poles.

A partition 18 is erected at a portion of the case 10 in which the movable contact 40 and the fixed terminal plate 50 are housed, at a substantially central portion in the width direction of the case 10. Body 11
The portion of the lower wall corresponding to the partition 18 is covered with the cover 12.
A stepped portion 11a having a lower side is formed, the lower end of the partition wall 18 is brought into contact with the stepped portion 11a, and a horizontal piece 18a protruding from one surface side of the lower end of the partition wall 18 is placed on the lower wall of the body 11. The partition 18 is thereby positioned. Here, the lower wall of the body 11 where the partition wall 18 is placed forms a step in the longitudinal direction of the body 11 (left-right direction in FIG. 5), and the horizontal piece 1 of the partition wall 18 is formed.
The partition wall 18 is positioned also in the longitudinal direction of the body 11 by bending 8a along the lower wall. Further, the partition wall 18 is formed by the caulking pin 15
Boss 11e protruding from the body 11 at the position where the
It is also positioned by being inserted.

On the surface of the body 11 facing the partition wall 18, two terminal bases 11b and 11c on which one of the two poles, that is, the terminal plate 43 and the terminal piece 54 are mounted, are provided in a protruding manner. Two terminal bases 18b and 18c on which the other terminal plate 43 of the two poles and the terminal piece 54 are respectively mounted are provided on the surface facing the cover 12. Terminal bases 11b and 18b and terminal bases 11c and 18c
And, as shown in FIG. 7, are arranged in two stages,
The terminal plate 43 connected to the movable contact 41 and the terminal piece 54 connected to the fixed contact 51 are arranged at different height positions. A partition 11d is projected on the surface of the body 11 facing the partition 18, and a partition 18d is projected on the part corresponding to the partition 11d on the partition 18 toward the cover 12. Further, a partition 11f with which a part of the partition wall 18 abuts is projectingly provided on the surface of the body 11 facing the cover 12. The terminal board 43 is fixed by the terminal bases 11b and 18b and the lower surfaces of the partitions 11d and 18d, and the terminal piece 54 is fixed by the terminal bases 11b and 18b and the terminal bases 11c and 18d ( (See FIG. 5). Further, the partition 11f has a movable contact 41.
The adverse effect on the polarized electromagnet 20 due to the arc generated when the contact between the fixed contact 51 and the fixed contact 51 is opened is reduced.

By the way, in the remote control relay, the coil 2
In order to move the plunger 27 forward and backward when 5 is a single-winding type, it is necessary to reverse the energization direction to the coil 25. Therefore, the coil 25 is connected to a switching contact that selectively selects two types of power supply paths, and a reverse current blocking diode is connected to each power supply path selected by the switching contact. The terminals of the diodes opposite to the switching contacts are commonly connected. The diodes are connected in such a manner that the currents passing through the respective power supply paths are in opposite directions, and if one of the power supply paths passes the current in the direction of the switching contact → the coil 25, the other power supply path Then, a current in the direction of the coil 25 → switching contact is passed.

Since the energizing direction to the coil 25 is selected by the switching contact as described above, the energizing direction is selected so that the forward / backward position of the plunger 27 is reversed when the coil 25 is energized. Switch contact to plunger 2
It is necessary to switch according to the progress and retreat of 7. That is, it is necessary to interlock the forward / backward movement of the plunger 27 with the switching contact. Therefore, in this embodiment, a contact operation piece 37 is provided on the interlocking lever 31 so that the switching operation of the switching contact is performed by the contact operation piece 37.

As shown in FIG. 4, the switching contact includes a contact substrate 61 mounted on the upper surface of the polar electromagnet 20, and the contact substrate 61 includes two fixed contact plates 62a and 62b and respective fixed contacts. Movable contact plate 6 facing plates 62a and 62b, respectively
3a and 63b are fixed. The contact substrate 61 has a notch 61 a at a peripheral portion thereof, and the coil frame 26 of the polar electromagnet 20.
The fixed claw 26b protruding upward from the outer peripheral surface of the notch 61
Positioning with respect to the polar electromagnet 20 is performed by engaging with a. One end of each of the movable contact plates 63a and 63b is fixed to each leg of the substantially U-shaped contact support plate 64 and electrically connected to each other.
3b has a spring force in a direction of contacting the corresponding fixed contact plates 62a and 62b. The contact operation piece 37 of the interlocking lever 31 is inserted between the movable contact plates 63a and 63b (see FIG. 5), and when the interlocking lever 31 swings as the plunger 27 moves back and forth, the interlocking lever 3
One of the movable contact plates 63a,
63b is separated from the fixed contact plates 62a and 62b.

The fixed contact plates 62a and 62b and the movable contact plates 63a and 63b are electrically connected to a circuit board 65 which is a printed wiring board attached to the contact board 61. The diode and the reset differentiating circuit described above are mounted on the circuit board 65. Further, a pair of coil terminal plates 66 are fixed to the contact board 61, and a terminal screw 67 with a washer is screwed into each coil terminal plate 66. Therefore, the coil 2 receives the external signal input through the coil terminal plate 66.
When the power is supplied to 5, the plunger 27 moves back and forth according to the direction of the power supply. Here, as shown in FIG. 8, both coil terminal plates 66 are arranged at vertically displaced positions. The fixed contact plates 62a and 62b, the movable contact plates 63a and 63b, and the circuit board 65 are partitioned on the upper surface of the contact substrate 61,
Further, a partition piece 61b is provided so as to partition between the coil terminal plate 66 and another member.

Next, the operation will be described. First, Plunger 2
Assuming that the coil 25 is energized in the direction in which 7 projects, the interlocking lever 31 moves with the axial pin 3 as the plunger 27 projects.
3 and rotates clockwise in FIG.
Contacts the fixed contact 51. Here, since the movable contact 40 is in contact with the fulcrum protrusion 36 and is urged clockwise by the contact pressure spring 34 about the fulcrum protrusion 36,
The contact pressure of the movable contact 41 with respect to the fixed contact 51 is obtained by the contact pressure spring 34. At this time, as shown in FIG. 5, the movable contact plate 63b is separated from the fixed contact plate 62b, and only the direction in which the plunger 27 is retracted is permitted as the energizing direction to the coil 25. Here, when the movable contact 41 is in contact with the fixed contact 51, the magnetic force of the permanent magnet 23 maintains the state even when the energization of the coil 25 is stopped.

Next, when the energizing direction for energizing the coil 25 is reversed, the plunger 27 retracts and the interlocking lever 3 moves.
Since 1 rotates counterclockwise around the shaft pin 33 in FIG. 5,
The movable contact 41 separates from the fixed contact 51, and the main contact opens. An arc is generated when the main contacts are opened, but since the partition wall 18 exists between the two movable contacts 41, the insulation distance between the adjacent main contacts is increased, and moreover, between the adjacent movable contacts 40. Interlocking lever 31
Due to the presence of the partition plate 31a, the insulation distance between the movable contacts 40 is increased. Here, when an extremely large current such as a short-circuit current passes through the main contact when the main contact is closed, an arc occurs when the main contact opens even if the main contact is slightly open, and the periphery of the main contact melts, Since the case 10 may burst due to abrupt thermal expansion, when an excessive current such as a short-circuit current passes, an attractive force due to an electromagnetic force is applied between the movable electromagnetic iron piece 47 and the fixed electromagnetic iron piece 53 to move it. The contact 41 is held so as not to separate from the fixed contact 51.

[0023]

As described above, according to the present invention, the interlocking lever which is connected to the plunger of the polarized electromagnet and holds the movable contactor is provided with the partition plate inserted between the movable contactors, and the both sides of the partition plate are provided. Since the contact holders that hold the movable contacts are integrally provided, one interlocking lever can be used to hold the two movable contacts, and each movable contact can be interlocked as in the conventional case. There is an effect that the number of parts is reduced as compared with the case where the lever is provided. As a result, as compared with the case of using two interlocking levers, the output of the polar electromagnet can be reduced, and as a result, the polar electromagnet can be driven with a small amount of energy, which increases the operating sensitivity. In addition, since a partition plate made of an insulating material is interposed between both movable contacts to increase the creepage distance, if the same withstand voltage is set as when two interlocking levers are used, There is an advantage that the size can be reduced as a whole.

Further, since the size can be reduced as described above, it is possible to use a case having a unit size of the distribution board agreement size, and the width of the case can be halved as compared with the conventional configuration. is there.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the overall configuration of an embodiment.

FIG. 2 is an exploded perspective view showing a case used in the embodiment.

FIG. 3 is an exploded perspective view of a main part of the embodiment.

FIG. 4 is an exploded perspective view of a main part of the embodiment.

FIG. 5 is a partially cutaway side view of the embodiment with a cover removed.

FIG. 6 is a plan view of the embodiment.

FIG. 7 is a front view of the embodiment.

FIG. 8 is a rear view of the embodiment.

FIG. 9 is a perspective view of a main part of the embodiment.

FIG. 10 is a perspective view of a main part showing a conventional example.

[Explanation of symbols]

 10 case 20 polarized electromagnet 25 coil 27 plunger 31 interlocking lever 31a partition plate 31d contactor holder 33 shaft pin 40 movable contactor 41 movable contact 51 fixed contact 62a fixed contact plate 62b fixed contact plate 63a movable contact plate 63b movable contact plate

Claims (2)

[Claims] 1. A polarized electromagnet having a one-winding coil in which a plunger moves forward and backward in accordance with a current flowing direction to the coil, and a shaft pin rotatably supported around a metal shaft pin provided at a fixed position. An interlocking lever made of an insulating material that is coupled to the plunger at different positions and rotates around the shaft pin according to the advance / retreat of the plunger; and two movable contactors that are held by the interlocking lever and have a movable contact at one end. A fixed contact that separates from and contacts each movable contact, a switching contact that is inserted into the power feeding path to the coil and that selects the power feeding path to the coil from two power feeding paths in conjunction with the forward and backward movement of the plunger, and each power feeding selected by the switching contact. A remote control relay having a plurality of poles, which includes a backflow prevention element for restricting directions of currents passing through a path in opposite directions to each other, wherein an interlocking lever is inserted between both movable contacts. A two-pole remote control relay, comprising a partition plate, and a partition plate integrally formed with contact holders for holding movable contacts on both sides of the partition plate. 2. The two-pole remote control relay according to claim 1, wherein the case is set to a unit size standardized as a distribution panel agreement size.