JP3161776B2 - relay - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A conventional relay of this kind is shown in FIG.
A main contact block B and an auxiliary contact block C are disposed on both sides of the base 11, and a coil block A including a yoke 27, an iron core 29, a coil frame 31 around which a coil 32 is wound, and the like are disposed in the center. . A movable block D including a movable frame 36, an amateur 37, and a permanent magnet 38 is rotatably disposed on the coil block A. Note that a cover 46 is provided on the base 11.

[0003] Here, a rotating shaft 35 is protruded from a flange portion 33 of the coil frame 31, and a shaft hole 40 supported by the rotating shaft 35 is formed at an end of the movable frame 36. Movable frame 36
By inserting the rotating shaft 35 of the coil frame 31 into the shaft hole 40, the movable frame 36 becomes rotatable about the rotating shaft 35 as an axis. The main contact block B driven by the movable frame 36 includes a leaf spring 14 whose base is fixed to a terminal plate 13 fixed to the base 11, a movable contact 15 fixed to one surface of the tip of the leaf spring 14, A conductive plate 16 fixed to the other surface of the leaf spring 14 opposite to the movable contact 15, an iron piece 17 fixed to a lower portion of the conductive plate 16, a fixed contact 20 fixed to a tip of a terminal plate 19, and an iron piece 17. Iron piece 2 provided opposite
1 and so on.

The leaf spring 14 is located in a slit 44 on the side of the movable frame 36, and is rotated by the rotation of the movable frame 36.
Is driven, and the contacts 15, 20 are opened and closed.

[0005]

In such a conventional relay, when contact welding occurs, the following operation is performed. That is, as shown in FIG. 13, the projecting portion 53 for releasing is attached to the movable frame 36 by pressing the side surface of the leaf spring 14.
Was provided. In other words, the projecting projection 53 of the movable frame 36 presses and deforms the leaf spring 14 to remove the welding of the contact. However, the leaf spring 1
4, the impact force is small, and the movable frame 36 of the electromagnet can be displaced in a state where the contacts are welded, and the attraction force of the electromagnet acts on each of the supporting portion and the welding portion of the leaf spring 14. However, all of them do not act as a welding peeling force, and there is a problem that the peeling force is small.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and can remove a weld without damaging a stripping force by applying an impact to a conductor plate other than a leaf spring during contact welding. It is intended to provide a relay.

[0007]

According to the present invention, there is provided an armature which is attracted to a magnetic pole surface of an iron core on which a coil is wound by excitation and reverse excitation of a coil, a movable frame which is rotated by an attraction operation of the armature, and a movable frame. A leaf spring driven by the rotation of the frame, a movable contact opposite to the fixed contact is provided on one surface of the tip of the leaf spring, and a conductor plate is provided on the other surface of the leaf spring opposite to the movable contact. In a relay that opens and closes contacts by driving a leaf spring by rotating the frame , the leaf spring
Are provided on the movable frame at the time of contact welding, and the projection collides with the projection of the conductor plate and is released.

[0008]

When the contact is welded , the movable frame protrudes from the protruding portion of the conductor plate which is substantially rigidized by welding different from the leaf spring.
By giving a shock from the starting part , without impairing the tripping force,
Alternatively, the welding of the contacts can be removed by the attraction of the electromagnet after the collision.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, before describing the remote control relay itself, a schematic configuration of a remote monitoring control device that uses this remote control relay and performs monitoring control by time division multiplex transmission will be described. FIG. 8 shows a schematic configuration of a remote monitoring and control system using a remote control relay according to the present invention.
A plurality of monitoring terminals 2 for setting the unique addresses and monitoring the switches S _{1 to} S ₄ , a control terminal 3 for controlling the loads L _{1 to} L ₄ , a wireless relay terminal 7, an external interface terminal 8, and The selector switch terminal 9 is connected by a pair of signal lines 4.

As shown in FIG. 9A, the transmission signal Vs transmitted from the central controller 1 to the signal line 4 includes a start pulse signal ST indicating the start of signal transmission, a mode data signal MD indicating a signal mode, and a terminal. vessels 2, 3, address data signal AD for transmitting 8-bit address data for calling the 7-9, the control data signal CD for transmitting the control data for controlling the load L ₁ ~L _4, check sum data signal CS and the terminal device This is a multipole (± 24 V) time division multiplexed signal comprising a return standby signal WT for setting a return period from 2, 3, 7 to 9, and data is transmitted by pulse width modulation.

In each of the terminals 2, 3, 7 to 9, when the address data of the transmission signal Vs received via the signal line 4 matches its own unique address data, the transmission signal Vs
In addition to taking in the control data of s, the monitor data signal is returned as a current mode signal (a signal transmitted by short-circuiting the signal lines 4 through an appropriate low impedance) in synchronization with the return signal WT of the transmission signal Vs. It is supposed to.

The central control unit 1 includes a dummy signal transmitting means for constantly transmitting a dummy transmission signal in which the mode data signal MD is set to the dummy mode, and any one of the monitoring terminal 2 or the wireless relay terminal 7 and the external terminal. When an interrupt signal Vi as shown in FIG. 9B returned from the interface terminal 8 and the selector switch terminal 9 is received, the interrupt generation terminals 2, 7 to 9 are detected and the terminal 2, Interrupt processing means for accessing 7 to 9 and returning monitoring data is provided.

In the central control unit 1, as described above,
Monitoring terminal 2 or wireless relay terminal 7,
External interface terminal 8, selector switch terminal
Based on the monitoring data returned to the central controller 1 from the
Corresponding load L₁~ L_FourControl terminal 3 for controlling
Create control data to be transmitted, and
Time-division multiplexing to the control terminal 3 via the signal line 4
Transmit and load L₁~ L _FourIs controlled.

The wireless relay terminal 7 is a terminal for relaying data in an optical wireless system comprising an optical wireless transmitter X, an optical wireless receiver Y and a wireless signal line 4a. The received optical signal is received by the optical wireless receiver Y, the received data is received via the wireless signal line 4a, and this data is transferred to the central control device 1.

The external interface terminal 8 is
The selector switch terminal 9 is a terminal that performs data transmission with the external control device 8a, and the selector switch terminal 9 is a terminal that centrally controls a large number of loads. The monitoring terminal 2 and the control terminal 3 disposed in the distribution board 6 or the relay control panel 6a have a distribution board agreement size, and the control output thereof is used to control the remote control relay for load control. (Latching relay that can be turned on and off also by a hand switch) 5 is controlled.

Next, a remote control relay used in the control terminal 3 will be described. FIG. 10 is an exploded perspective view of the control terminal 3, and FIG. 11 is a block diagram.
Here, remote control relay is represented by Ry ₁ to Ry _4. The transmission module 59 includes a signal processing circuit including a microcomputer, an address setting unit 58 formed of an EEPROM, a photodiode PD, a light emitting diode LD, and the like.

Further, as shown in FIG.
4 sets of outputs are set winding S and reset respectively.
Remote control which is a two-winding latching relay having a winding R
Relay Ry₁~ Ry_FourIs connected. Each relay Ry₁
~ Ry_FourHas the main contact R₁~ R _FourAnd auxiliary contact r₁~ R_FourTo
With main contact R₁... A load is connected between the auxiliary contacts
r₁... are the signal processing of the transmission module 59
Input to the circuit and returned to the central control unit as a monitoring signal
It is supposed to be.

Normally, arbitrary relays Ry ₁ ... Are driven on the basis of control data transmitted from the central control unit to control on / off of a load connected to main contacts R _1. However, in the present embodiment, the relay Ry ₁ ...
Are directly and collectively turned on or off, and switches SW ₁ and SW ₂ for turning on or off the load are provided. The switch SW ₁ is a switch for turning on the relays Ry ₁ ... Collectively, and the switch SW ₂ is a relay Ry
_This is a switch for turning off ₁ ... all together.

The transmission signal Vs transmitted through the signal line 4 is input to the signal processing circuit of the transmission module 59, and the unique address data set in the address setting unit 58 and the received transmission signal Vs is determined to match the address data, and control data (in the embodiment, dimming control data) transmitted at the time of the address match is taken in, and relays Ry ₁ ... Corresponding to the specified load are taken.
Control.

The relays Ry ₁ ... Energize the reset winding R or the set winding S of the relay Ry ₁ by a signal output from the transmission module 59, and
Turn ₁ off or on. By this main contact R ₁ of the on-off is turned on or off control of the load. State of the load, the contact output of the auxiliary contact r ₁ relay Ry ₁ is input to the transmission module 59, is created as a monitoring signal indicating the operating state of the load. So that the the return signal V _B to be returned to the central control unit 1 is sent to the signal line 4 as returned by the monitoring data the current mode signal (inserting a resistor R of low resistance value between the signal line 4) .

On the other hand, the EE constituting the address setting unit 58
Writing of data to the PROM is performed by the transmission module 59.
Is performed by the signal processing circuit. FIG.
As shown in FIG. 0, the terminal case 60 is formed to have two module dimensions of a common size of a distribution board. The terminal case 60 is composed of a body 60a and a cover 60b. It is assembled and connected by a fixing screw 73.

The printed circuit board block 61 is composed of upper and lower printed circuit boards 61a and 61b. A signal processing circuit comprising a microcomputer and an address setting section 58 comprising an EEPROM are provided on the upper printed circuit board 61a.
And a photodiode P for transmitting and receiving an optical wireless signal
D and a light emitting diode LD, a light emitting diode LDc for confirming reception, and switches SW ₁ and SW ₂ for collective control are mounted. Further, the relay Ry ₁ to Ry ₄ is mounted on the lower side of the printed circuit board 61b.

The upper printed circuit board 61a is disposed on the back surface of the cover 60b with screws 72, and an opening 62a corresponding to the light emitting diode LD and the photodiode PD is provided on the front surface of the terminal case 60, that is, one end of the cover 60b.
And an opening 62 corresponding to the confirmation light emitting diode LDc.
b are provided, and a filter 63 for cutting unnecessary infrared rays is provided in the opening 62a for transmitting and receiving the optical wireless signal.

The light emitting diode LDc is connected to the opening 62.
The transparent nameplate 70 is attached to the concave portion 67 of the cover 60b provided with the opening 62b and the filter 63. The nameplate 70 has switches SW ₁ and SW
A cutout 70a for exposing the _second operation unit is formed.
In the case of a non-transparent nameplate, the opening 62b and the filter 63 may be cut out.

At one end of the cover 60b, there are provided four sets of connection terminals 74 for outputting contact outputs of the main contacts R ₁ ... Provided with lead wires 75, and these connection terminals 74 are screwed with screws 78. It is covered with the terminal cover 79 attached. Also,
A signal terminal 7 to which a signal line is connected is provided at the other end of the cover 60b.
7 are provided. Each terminal 74, 77 is composed of a terminal plate and a terminal screw.

[0026] Incidentally, in the circuit of the FIG. 11, the terminal T ₁ ~
T ₈ corresponds to the connection terminal 74, and the signal terminal 77
₉ and T ₁₀ correspond to each other. On the other hand, the terminal case 60
The body 60a is provided with a mounting groove 66 in which a connecting plate or a DIN rail mounting adapter is mounted. Next, a remote control relay which is the gist of the present invention will be described. This remote control relay corresponds to the above-mentioned remote control relays Ry ₁ . Also, the main contact R ₁
.. Correspond to the main contact block B, and the auxiliary contacts r ₁ .

FIG. 1 is an exploded perspective view of the whole, FIG. 2 is a perspective view, and FIG. 3 is a plan view. A coil block A is disposed at the center of the upper surface of a base 11 made of an insulating material, a main contact block B is disposed outside a partition wall 12 integrally protruding from the base 11, and an auxiliary contact is provided on the other insulating wall 12a. Block C is provided. Conductive terminal plate 1
A base of a conductive leaf spring 14 is fixed to the upper end of the base 3.
The terminal plate 13 is arranged on the base 11 through a hole 11 a formed in the base 11. Leaf spring 14
The movable contact 15 is fixed to one surface of the tip of the conductor plate, and the conductor plate 16 having the protrusion 54 projecting from the upper end is fixed to the other surface. The movable contact 15, leaf spring 14, and conductor plate 16 are fixed in three layers. That is, the leaf spring 14 and the conductor plate 16 are simultaneously caulked and fixed by the movable contact 15.

An iron piece 17 is fixed to a lower portion of the conductor plate 16. A flexible braided conductive wire 18 is connected between the lower portion of the conductor plate 16 and the central portion of the terminal plate 13 in parallel with the leaf spring 14 by spot welding. A fixed contact 20 facing the movable contact 15 is fixed to the upper end of the conductive terminal plate 19 provided in the hole 11b of the base 11, and a substantially U-shaped iron piece 21 is provided at the center. ing.

The auxiliary contact block C arranged on the side opposite to the main contact block B is configured as follows. That is, the base of a leaf spring 25 having a movable contact 26 fixed to the distal end thereof opposed to the fixed contact 23 fixed to the upper end of the auxiliary terminal plate 22 is inserted into the hole 11c of the insulating wall 12a. The auxiliary terminal plate 22 is also inserted and arranged in the hole of the insulating wall 12a.

Next, the coil block A disposed between the partition wall 12 at the center of the upper surface of the base 11 and the insulating wall 12a between the main contact block B and the auxiliary contact block C will be described. A rectangular hole 27a is formed in one piece of the yoke 27 bent into an L shape, and magnetic pole pieces 28 stand upright from both ends of the other piece. A substantially T-shaped iron core 29 is inserted through the inside of the coil frame 31, and a protrusion 29 a at the tip is fitted into the hole 27 a of the yoke 27 and fixed by caulking or the like.
9 is fixed to the yoke 27.

The end of the iron core 29 is protruded from the coil frame 31, and both side surfaces are magnetic pole surfaces 30. A coil 32 is wound around the outer peripheral surface of the coil frame 31, and three coil terminals 34 connected to terminals of the coil 32 are embedded in one thick flange portion 33 of the coil frame 31. Bottom of the coil terminals 34 are respectively inserted into the hole 11 ₁ of the base 11. A protrusion 33a is formed on the upper surface of the flange portion 33 of the coil frame 31, and a rotation shaft 35 is formed on the protrusion 33a.

The movable block D disposed above the coil block A has a movable frame 36 and two armatures 37 (3
7a, 37b) and a permanent magnet 38. A shaft hole 40 is formed at one end of the movable frame 36 made of an insulator. The rotating shaft 3 of the coil frame 31 is
5, the movable frame 36 is rotatable. On the lower surface of the other end of the movable frame 36, two armatures 37 sandwiching a permanent magnet 38 are arranged, and an arm 41 for driving the leaf spring 14 is formed from one side of the movable frame 36.

At the end of the arm portion 41 of the movable frame 36, the projecting portion 5 of the conductor plate 16 is used for releasing contact welding.
The projections 55 are formed integrally with each other. By causing the projection 55 to collide with the projection 54 of the conductor plate 16,
This is to remove the contact welding. The arm 41 constituting the card has a slit 44 formed in the lower surface opening, and the leaf spring 14 is disposed in the slit 44. The slit 44 is open at the lower surface and side, so that the leaf spring 14 can be easily arranged in the slit 44. A projection 45 is integrally formed on the opposite side of the arm 41, and the leaf spring 25 of the auxiliary contact block C is disposed in a slit formed on the lower surface of the projection 45. To drive.

The base 11 on which the above members are disposed is covered with a cover 46 made of an insulating material having a box-like shape and having an opening on the lower surface. When the movable block D is disposed on the coil block A, Is a main contact block B as shown in FIG.
The leaf spring 14 of the auxiliary contact block C is accommodated in the slit 44 of the movable frame 36 and accommodated in the slit of the projection 45. The magnetic pole surface 30 of the iron core 29
The armatures 37 are located between a pair of gaps formed between the magnetic pole piece 28 and the magnetic pole piece 28. Thus, the movable block D is disposed above the coil block A to form a polarized electromagnet block.

Then, the inner surface of the armature 37 is alternately turned on the magnetic pole surface 30 of the iron core 29 by exciting and reverse exciting the coil 32.
And the magnetic pole piece 28 of the yoke 27 attracts the movable frame 36
To rotate the main contact block B and the auxiliary contact block C
To drive. Incidentally, the remote control relay is a latching relay, and the coil 32 has two windings. The coil 32 is connected to the coil terminal 34 as described above, but as shown in FIGS.
4 is a common terminal 34c, one set terminal 34a for turning on the main contact and a reset terminal 34b for turning off the main contact.
It is.

FIG. 3 shows a non-excited state, in which one armature 37b is attracted by the magnetic pole face 30 of the iron core 29 and the magnetic pole piece 28 of the other armature 37a by the magnetic flux of the permanent magnet 38. Both contacts 15, 20 of B are open. Further, since the movable frame 36 is urged in the counterclockwise direction, the leaf spring 25 of the auxiliary contact block C is elastically contacted with the slit of the projection 45 of the movable frame 36,
26 is open.

The set terminal 34a and the common terminal 34
When a voltage is applied to c, the coil 32 is excited, and one of the armatures 37a contacts the magnetic pole face 30 of the iron core 29, and
The other armatures 37b are attracted to the magnetic pole pieces 28, respectively, and the movable frame 36 rotates clockwise about the rotation shaft 35 to be turned on. That is, when the movable frame 36 rotates clockwise, the leaf spring 14 of the main contact block B is urged by the arm portion 41 to close both contacts 15 and 20, and the slit of the projection 45 is formed. The leaf spring 25 is driven by the
3, 26 are closed. In this ON state, the reset terminal 3
When a voltage is applied to 4b and the common terminal 34c, the state of FIG. 3 is restored.

Here, in the main contact block B of the main contact,
Because the braided conductor 18 is connected in parallel with the leaf spring 14,
When a large current such as a short-circuit current flows, the current is diverted to the leaf spring 14 and the braided conductor 18 to prevent the fusing of the leaf spring 14 and reduce the heat generation of the leaf spring 14, so that it is movable. The melting of the arm portion 41, which is the spring driving portion of the frame 36, is also prevented.

When a short-circuit current flows, the conductor plate 16
Attraction force is generated by the iron pieces 17 and 21 provided on the terminal plate 19 to prevent electromagnetic repulsion of the contacts. still,
In order to increase the current withstand capability of the leaf spring 14, it is sufficient to increase the cross-sectional area of the leaf spring 14 itself. However, in this case, the spring load becomes large, and it is difficult to match the movable block D with the attraction force of the electromagnet. turn into.

However, in this embodiment, since only the leaf spring 14 having a small cross-sectional area is pushed, the spring load can be made similar to that of the conventional relay. Further, in the present embodiment, the braided conductor 18 is attached to the conductor plate 16, but the braided conductor 18 may be directly connected to the back surface of the movable contact 15 or the like. In the embodiment of the present invention, the main contact is a flexure and the auxiliary contact is a lift-off type. However, the present invention is not limited to this. On the auxiliary contact side, the contacts 23 and 26 are plated with gold or the like in order to improve reliability.

Next, a description will be given of a trip at the time of welding the contacts. As shown in FIG.
In the case where 29 is welded, the coil 32 is reversely excited to cause the projection 55 of the movable frame 36 to collide with the projection 54 of the conductor plate 16 which has been substantially rigidized by welding, and the collision energy (impact force) Alternatively, the welding is pulled off by the attraction force of the electromagnet after the collision. The projection 53 shown by a broken line in FIG. 4 indicates a conventional position.

FIGS. 5 to 7 show an embodiment in which two sets of main contact blocks B are provided to form a so-called double-cut type.
That is, the partition walls 12 are formed on both sides of the base 11, respectively.
A main contact block B having the same configuration as that of the previous embodiment is disposed outside the partition wall 12, and an auxiliary contact block C is disposed outside one main contact block B. In this embodiment, the leaf spring 2 of the auxiliary contact block C is used.
5 is fixedly arranged on the upper part of the auxiliary terminal plate 24 fixed to the base 11.

Also, the protrusion 33 of the flange 33 of the coil frame 31
a, a substantially semicircular recess 48 is formed.
At the center of 8, a rotating shaft 35 is protruded. In addition, movable frame 3
A boss 49 that fits into the recess 48 protrudes from one end of the shaft 6, and a shaft hole 4 into which the rotary shaft 35 is inserted.
0 is drilled. In addition, since the main contact blocks B are provided on both sides, the arm portions 41 and 50 are formed on both sides of the movable frame 36 in the present embodiment, and the protrusions 42 formed on the both arm portions 41 and 50, respectively. The leaf springs 14 of both main contact blocks B are arranged in the slits 44 between the 43. Further, the arm 50
A projection 51 for urging the leaf spring 25 of the auxiliary contact block C protrudes from the tip of the auxiliary contact block C.

Further, corresponding to the protrusion 54 of the conductor plate 16,
Protrusions 5 for contact welding and removal on both sides of the movable frame 36, respectively.
5 are integrally provided.

[0045]

According to the present invention, as described above, the coil excitation,
An armature that is attracted to the magnetic pole surface of the iron core on which the coil is wound by the reverse excitation, a movable frame that is rotated by the attraction operation of the armature, and a leaf spring that is driven by the rotation of the movable frame. A movable contact opposed to the fixed contact is provided on one surface of the tip, and a conductor plate is provided on the other surface of the leaf spring opposite to the movable contact, so that the leaf spring is driven by turning the movable frame to open and close the contact. Of the leaf spring on the conductor plate
A projection protruding in the direction of
Since the movable frame is provided with a projection that collides with the projection of the movable frame, the projection of the movable frame is attached to the projection of the conductor plate that is almost rigidized by welding separate from the leaf spring during contact welding.
Thus, it is possible to remove the welding of the contacts without impairing the tripping force or by the attraction force of the electromagnet after the collision.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an entire relay according to an embodiment of the present invention.

FIG. 2 is a perspective view of the entire relay.

FIG. 3 is a plan view of the relay.

FIG. 4 is a view for explaining trip of contact welding of the above.

FIG. 5 is an exploded perspective view of another embodiment of the above.

FIG. 6 is an overall perspective view of the relay.

FIG. 7 is a plan view of the relay.

FIG. 8 is a schematic system diagram of a remote control system using the relay.

FIG. 9 is an operation explanatory diagram of FIG. 8;

FIG. 10 is an exploded perspective view of the control terminal.

FIG. 11 is a block circuit diagram of a control terminal.

FIG. 12 is an exploded perspective view of a conventional relay.

FIG. 13 is an explanatory view of a conventional example at the time of contact welding.

[Description of Signs] 14 Leaf spring 15 Movable contact 16 Conductor plate 20 Fixed contact 29 Iron core 30 Magnetic pole surface 32 Coil 36 Movable frame 37 Amateur 55 Projection

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-114423 (JP, A) JP-A 2-98436 (JP, U) JP-A 56-14453 (JP, U) Field (Int.Cl. ⁷ , DB name) H01H 51/22 H01H 50/56

Claims (1)

(57) [Claims] 1. An armature attracted to a magnetic pole surface of an iron core on which a coil is wound by excitation and reverse excitation of a coil, a movable frame rotated by an armature suction operation, and driven by a rotation of the movable frame. A leaf spring, a movable contact opposite to the fixed contact is provided on one surface of the leaf spring, a conductor plate is provided on the other surface of the leaf spring opposite to the movable contact, and the leaf spring is rotated by rotating the movable frame. In a relay that is driven to open and close contacts, a protruding portion is provided on the conductor plate to protrude to the side of the leaf spring.
A relay provided on the movable frame, wherein the projection collides with the projection of the conductor plate and is tripped when the contact is welded.