JPH06203719A - Remote control relay - Google Patents

Abstract

PURPOSE:To provide a single pole type remote control relay which facilitate the wiring works when the main contact is to be inserted between a power supply and a load. CONSTITUTION:An interlocking lever 31 holds a movable contacting piece 40 and swings rotationally round a shaft pin 33 in association with a plunger 27 installed on a polarized electromagnet 20. A feed terminal plate 70 forms an electric path which does not pass a movable contact 41 and stationary contact 51. Terminal pieces 71, 72 are furnished at the ends of the feed terminal plate 70, and terminal screws 73, 74 are fitted in these terminal pieces 71, 72. When wiring is conducted by inserting the movable contact 41 and stationary contact 51 between the power supply and load, one-side ends of them are connected with a terminal plate 43 and a terminal piece 54, and the other ends of the power supply and load are connected with the terminal pieces 71, 72. Thereby the wiring is completed through the terminal plate 70.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 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 as a backflow prevention element that is inserted in the power supply path to the coil as the plunger moves back and forth, the coil is energized only in the direction that retracts the plunger when the plunger projects, There is provided a single-pole remote control relay that permits energization of the coil only in the direction in which the plunger is projected when retiring. That is, as shown in FIG. 9 (b), 2 types alternatively switching contact r ₀ for selecting the power supply path is connected to the coil 25, and the respective feeding path selected by the switching contact r ₀ Diodes D ₁ and D ₂ as backflow blocking elements are connected to each other. Diode D
_{The terminals of 1} and D ₂ on the opposite side of the switching contact r ₀ are commonly connected. The diodes D ₁ and D ₂ are connected in such a manner that the currents passing through the respective power supply paths are in opposite directions, and when one of the power supply paths passes a current in the direction of the switching contact r ₀ → the coil 25. Then, the other power supply path allows the current in the direction of coil 25 → switching contact r ₀ to pass therethrough. One diode D ₂
A differentiating circuit for resetting, which is a series circuit of a capacitor C and a resistor R, is connected between the anode of and the common contact of the switching contact r ₀ . With this circuit configuration, the polarized electromagnet 2
By switching the energization direction to the coil 25 of 0, the movable contact 4
It is possible to open and close the main contact point r ₁ consisting of 1 and the fixed contact point 51.

By the way, in this type of remote control relay, as shown in FIG. 9, a terminal screw 6 is provided in a power feeding path to the coil 25.
7 is provided, and two terminal portions having terminal screws 44 and 55 are provided at both ends of the main contact r ₀ .

[0004]

The main contact r ₀ between the power supply AC and the load L is made by using the above-mentioned conventional remote control relay.
If an attempt is made to insert, the connection will be as shown in FIG. 9 (a). That is, one ends of the power supply AC and the load L are connected to the terminal screws 44 and 55, respectively, and the power supply AC and the load L are connected.
It is necessary to directly connect the other ends of and. As a result, a connection process such as soldering and an insulation process such as mounting an insulating sleeve are required at the connection portion A between the power source AC and the load L, which causes a problem that the connection work is troublesome.

An object of the present invention is to solve the above problems, and an object of the present invention is to provide a remote control relay which facilitates connection work when a main contact is inserted between a power source and a load.

[0006]

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. One movable contactor having a movable contact at one end, a fixed contact that separates from and contacts the movable contact, and a power supply path to the coil that is inserted into the power supply path to the coil and is linked to the forward and backward movement of the plunger. A remote control relay having a plurality of poles provided in a case with a switching contact selected from among and a backflow prevention element that restricts the directions of currents passing through the power supply paths selected by the switching contact in opposite directions. What is of the path passing through the movable contact and the fixed contact has a terminal portion at both ends is provided with a feed terminal plate to form another path in the case.

[0007]

According to the above construction, since the case is provided with the feed terminal plate forming an electric path different from the electric path passing through the movable contact and the fixed contact, and the terminal portions are formed at both ends of the feed terminal plate. When connecting a main contact consisting of a movable contact and a fixed contact between the power supply and the load, connect each end of the power supply and the load to the movable contact and the fixed contact, respectively, and connect the power supply and the load to each other. It suffices to connect the other end of each to the terminal part of the feed terminal, and if each of the two connecting wires for the power supply and the load is connected to the remote control relay, the main contact is inserted between the power supply and the load. You can work. as a result,
This eliminates the need to separately connect the power supply and the load, and facilitates the wiring work.

[0008]

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. 4) capable of accommodating functional components, 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. 4, 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, and 4, 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. 31c is pivotally mounted. Further, the interlocking lever 31 is used for the polar electromagnet 20.
Pair of support pieces 26 protruding from the outer peripheral surface of the coil frame 26
The shaft is supported by two shaft pins 33 inserted through a. 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. However, the length dimension is set inside the interlocking lever 31 so that both shaft pins 33 do not contact each other. It is set. Inside the interlocking lever 31, the interlocking lever 3 is provided between the two shaft pins 33.
Synthetic resin, which is the constituent material of No. 1, is present, and both shaft pins 3
3 is insulated. The shaft pin 32 and the shaft pin 33 are parallel to each other, and when the plunger 27 reciprocates, the interlocking lever 31 swings around the shaft pin 33. In this way, the fulcrum of the interlocking lever 31 is constituted by the two shaft pins 33, and the interlocking lever 3 is provided between the tips of both shaft pins 33.
By interposing a part of No. 1, the shaft pins 33 are insulated from each other.

The interlocking lever 31 has a partition plate 31a, and the contact holders 31d are provided on the left and right side surfaces of the partition plate 31a, respectively.
Are integrally provided so as to project into the contact holding base 31d.
1b is formed. On both side surfaces of the partition plate 31a, spring receiving protrusions 31e formed in a substantially U shape, the surfaces of which face the contact holder 31d, are opened. 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 elastically contacts the movable contactor 40 inserted between the contactor holder 31d and the spring receiving protrusion 31e on one surface side of the partition plate 31a. That is, the interlocking lever 31 holds one movable contact 40.

The movable contactor 40 has a strip shape, 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 through 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. Since the movable contactor 40 and the fixed terminal plate 50 are housed in the case 10 one by one, the main contact is constituted by a single pole.

A partition 18 is provided upright at a substantially central portion in the width direction of the case 10 at a portion of the case 10 in which the movable contact 40 and the fixed terminal plate 50 are housed. 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 (the left-right direction in FIG. 4), 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 on which terminal pieces 71 and 72 formed at both ends of a feed terminal plate 70 formed by bending a conductive sheet metal are respectively placed. Two terminal bases 18b, 1c are provided on which the bases 11b, 11c are projected and the terminal plate 43 and the terminal piece 54 are mounted on the surface of the partition wall 18 facing the cover 12.
8c is projected. The feed terminal plate 70 forms an electric path that does not pass through the main contacts, and terminal screws 73 and 74 with washers are screwed to the terminal pieces 71 and 72, respectively. Terminal bases 11b, 1
As shown in FIG. 6, 8b and the terminal bases 11c and 18c are arranged in two upper and lower stages, and the terminal piece 71 and the terminal piece 7 are arranged.
2. Terminal plate 43 connected to movable contact 41 and fixed contact 5
The terminal pieces 54 connected to 1 are arranged at different height positions. Further, the terminal piece 71 and the terminal plate 43, and the terminal piece 72 and the terminal piece 54 are arranged at the same height position. 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, the cover 12 on the body 11
11f where a part of the partition wall 18 abuts on the surface facing
Is projected. Therefore, the terminal plate 43 and the terminal piece 71
Is fixed by the terminal bases 11b and 18b and the lower surfaces of the partitions 11d and 18d, and the terminal piece 54 and the terminal piece 72 are fixed by the terminal bases 11b and 18b and the terminal bases 11c and 18d. (See Figure 4). Further, the partition 11f reduces the adverse effect on the polarized electromagnet 20 due to the arc generated when the movable contact 41 and the fixed contact 51 are opened.

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, as shown in FIG.
A switching contact r for selectively selecting two kinds of power feeding paths in
₀ is connected to each of the feeding paths selected by the switching contact r ₀ , and a diode D as a backflow prevention element is provided.
₁ and D ₂ are connected. The terminals of the diodes D ₁ and D ₂ on the side opposite to the switching contact r ₀ are commonly connected. The diodes D ₁ and D ₂ are connected in such a manner that the currents passing through the respective power supply paths are in opposite directions, and when one of the power supply paths passes a current in the direction of the switching contact r ₀ → the coil 25. Then, the other power supply path allows the current in the direction of coil 25 → switching contact r ₀ to pass therethrough. A differentiating circuit for resetting, which is a series circuit of a capacitor C and a resistor R, is connected between the anode of one diode D ₂ and the common contact of the switching contact r ₀ . With this circuit configuration, the main contact r ₁ including the movable contact 41 and the fixed contact 51 can be opened and closed by switching the energization direction of the coil 25 of the polar electromagnet 20.

Since the energizing direction to the coil 25 is selected by the switching contact r ₀ 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. The contact point r ₀ is the plunger 27
It is necessary to switch according to the progress and retreat of. That is, it is necessary to interlock the forward / backward movement of the plunger 27 with the switching contact r ₀ . Therefore, in this embodiment, a contact operation piece 37 is provided on the interlocking lever 31 so as to project the switching contact r ₀ .

As shown in FIG. 3, 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 each fixed contact. 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. 4). When the interlocking lever 31 swings as the plunger 27 moves back and forth, the interlocking lever 3 moves.
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. 7, 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. 4, 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 in FIG. 4 around the shaft pin 33,
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.

By the way, as described above, the case 10 is provided with the feed terminal plate 70, and the movable contact 41 and the fixed contact 51 are provided.
Since the terminal pieces 71 and 72 are arranged in parallel to the terminal plate 43 and the terminal piece 54 which are connected to, when the main contact r ₁ is inserted between the power source AC which is the commercial power source and the load L. 8A, the terminal plate 43 and the terminal piece 7 are
Power supply AC is connected to 1 and terminal piece 54 and terminal piece 7
By connecting the load L to 2 and 2, the main contact point r ₁ can be inserted between the power supply AC and the load L for connection. The presence of the feed terminal plate 70 eliminates the need to directly connect the power source AC and the load L by soldering or the like, which facilitates the wiring work.

[0023]

As described above, according to the present invention, the case is provided with the feed terminal plate forming an electric path different from the electric path passing through the movable contact and the fixed contact, and the terminal portions are formed at both ends of the feed terminal plate. Therefore, when connecting the main contact consisting of the movable contact and the fixed contact between the power source and the load, each end of the power source and the load is connected to the movable contact and the fixed contact, respectively. It suffices to connect the other ends of the power supply and the load to the terminal portion of the feed terminal. If two connection lines for the power supply and the load are connected to the remote control relay, the main contact point will be placed between the power supply and the load. It is possible to do the wiring work to insert. As a result, it is not necessary to separately connect the power source and the load, and there is an advantage that the connection work becomes easy.

[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 a partially cutaway side view of the embodiment with a cover removed.

FIG. 5 is a plan view of the embodiment.

FIG. 6 is a front view of the embodiment.

FIG. 7 is a rear view of the example.

FIG. 8 shows an embodiment, (a) is a connection diagram showing connection with a power supply and a load, and (b) is a circuit diagram showing an internal circuit.

9A and 9B show a conventional example, FIG. 9A is a connection diagram showing a connection with a power supply and a load, and FIG. 9B is a circuit diagram showing an internal circuit.

[Explanation of symbols] 10 case 20 polarized electromagnet 25 coil 27 plunger 31 interlocking lever 33 shaft pin 40 movable contact 41 movable contact 51 fixed contact 62a fixed contact plate 62b fixed contact plate 63a movable contact plate 63b movable contact plate 70 feed terminal Plate 71 Terminal piece 72 Terminal piece 73 Terminal screw 74 Terminal screw

Claims (1)

[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 one movable contactor that is held by the interlocking lever and has a movable contact at one end. A fixed contact that separates from and contacts the movable contact, a switching contact that is inserted into the power supply path to the coil and that selects the power supply path to the coil from two power supply paths in conjunction with the forward and backward movement of the plunger, and each power supply path selected by the switch contact. A remote control relay having a plurality of poles provided with a backflow prevention element for restricting the directions of currents passing through in opposite directions in a case, having terminal parts at both ends and passing a movable contact and a fixed contact. The remote control relay is characterized in that the case has a feed terminal plate that forms an electric path different from the electric path.