CN1037555C

CN1037555C - Electromagnetic relay with bistable contact

Info

Publication number: CN1037555C
Application number: CN 94115707
Authority: CN
Inventors: 朱约尔·法格努尔; 让－巴普蒂斯·塔利耶
Original assignee: Schneider Electric SE
Current assignee: Schneider Electric SE
Priority date: 1993-08-26
Filing date: 1994-08-25
Publication date: 1998-02-25
Anticipated expiration: 2014-08-25
Also published as: DE69415440T2; CN1104368A; FR2709370B1; ES2126728T3; EP0641003A1; BR9403330A; DE69415440D1; EP0641003B1; FR2709370A1

Abstract

An electromagnetic relay includes an electromagnet (14) with a pivoting blade, a mechanism (16) with a bell crank (44) intended to drive a bistable rocker contact (20), and an elastic device (56) for returning the blade (38) to a spaced-away position when the coil of the electromagnet (14) is not excited. A link rod (48) is articulated onto the blade (38) and the bell crank (44), and the return device includes a pair of compression springs (58, 60), one of which acts later than the other. A contact position indicator (72) is incorporated within a manual-control test button (70), and comprises an optical prism (78) interacting with a feeler (80) integral with the blade (38).

Description

Electromagnetic relay with bistable contact

The present invention relates to a kind of electromagnetic relay that is contained in the insulation shell, it comprises:

Has electromagnet with pivotally supported ferromagnetic blade;

Operating mechanism has the part that shakes that can shake on one between two end positions, angle;

Controls is securely connected on blade, and with shake the part co-operation, in each operation cycle of blade, make and shake part and move to another position from a position;

Power circuit has one by shaking that part drives and shaking contact with the bistable state of at least one fixed contact co-operating;

Flexible apparatus is used for making blade to turn back to the position that separates under the static state of electromagnet.

Such device by the applicant at FR-A-2,676, described in 590, during each current impulse that solenoid is applied, because and the effect of shaking the controls of part co-operating, contacts status changes, and this controls is made of the simple depression bar that is fixed on the blade.This mechanism can not constitute direct, permanent mechanical connection with rocking bar, thereby this device only is operated in the remote control conversion regime.

The object of the present invention is to provide and a kind ofly shake the device that the contact is handled by bistable state, it can be easily constitutes electromagnetic relay by the remote control switch structure of standard.

According to the present invention, operating parts comprises and is connected blade and shakes connecting rod on the part, thereby forms a permanent direct connection, and connecting rod is biased with respect to waving axle with the tie point that shakes part.

The connecting rod that is connected with wobble-member with blade replaces depression bar simply, can make remote control switch convert relay to, especially contactor.

According to characteristics of the present invention, flexible return mechanism comprises: act on a pair of compression spring on the blade lower surface, they are in parallel with each other and along extending to connecting rod with the almost vertical direction of blade, described two springs have different length and strength characteristics, and one of them acts on before another.

According to another characteristics of the present invention, the contact position indicating device is housed in the manual operation test button, this indicating device comprises and is combined in securely the optical prism of the sensor synergism work on the blade, transducer has two signal marks, and they are in attracted position or separation point position alternately in the face of the inclined-plane of prism according to blade.

To can more being clear that the description of embodiment, this embodiment is only as a nonrestrictive example from following for its its feature of the present invention and advantage, and represented by accompanying drawing, wherein:

Fig. 1 is the front view of electromagnetic relay of the present invention, and being in when electromagnet does not have OFF state when excitatory;

Fig. 2 is the view identical with Fig. 1, and relay is equipped with additional testing button and contact position indicating device;

Fig. 3 is the line 3-3 sectional view of Fig. 2;

Fig. 4 is the partial view of Fig. 2, the indicating device when the excitatory back of expression electromagnet relay is in the ON position;

Fig. 5 is the line 5-5 sectional view of Fig. 4;

Fig. 6 is that test button is by the partial view by Fig. 2 later;

Fig. 7 is the sectional view of 7-7 along the line among Fig. 6.

Referring to Fig. 1, switching relay 10 is installed in the housing of being made by moulded insulation 12, and electromagnet 14 is wherein arranged, operating mechanism 16 and contain the power circuit that waves moving contact 20 18 with 22,24 collaborative works of two fixed contacts.Decide contact 22 and link the

first terminal

26,10 another fixed contacts 24 of conversion relay are linked on second terminal 28, and two

terminals

26,28 are positioned at the same side of housing 12.

Moving contact 20 is equipped with contact point arm 30, is used an end that is pivotally mounted in rigid conductor 34 to connect on 32 to blade, and the other end of rigid conductor is connected on the 3rd terminal 36.Contact point arm 30 and be submissive blade shape and make moving contact 20 have the spring 38 of two settling positions to link.The 3rd terminal 36 is positioned at the opposite side of other two

terminals

26,28.

Electromagnet 14 comprises ferromagnetic blade 38, and its is contained in the left part of yoke 40 with pivot, polarization spring 42 and be positioned near the bonding pad 43 blade 38 collaborative works, thus guarantee minimum clearance during turning.

Operating mechanism 16 comprises and shakes part 44, and it is installed on the axle 46, waves between two extreme positions, angle, and connecting rod 48, and the one end links to each other with blade 38, the other end with shake part 44 and link to each other.Setover with respect to waving axle 46 at the tie point 50 that shakes the bar 48 on the part 44.

Shaking part 44 is U-shapeds, has a central channel 52, and an end of contact point arm 30 in interlock therein.Blade 38 from energized condition convert to static state or opposite, moves to another position to wobble-member 44 from a position according to electromagnet 14 in each manipulation cycle of blade 38.

Do not have at coil under the resting state of excitation corresponding to electromagnet 14, by means of the flexible return mechanism 56 between the part that is placed in housing 12 and blade, the plane of polarization 54 of blade 38 and yoke 40 keeps separately, return mechanism 56 comprises a pair of

compression spring

58,60 on the projection 62 that is supported on housing 12, and their edges direction separately act directly on the lower surface of blade 38.Moving contact 20 withstands on fixed contact 24 by position shown in Figure 1.Two

springs

58,60 extend parallel to each other along the direction perpendicular to blade 38.

When electromagnet 14 was energized, blade 38 was inhaled to pole-face 54, and bar 48 makes and shakes part 44 and wave, thereby moving contact 20 downward fixed contacts 22 are moved.By means of the adjustment of 58,60 pairs of return forces of spring, can be in the attraction process of blade 38 the excessive energy that applies by electromagnet 14 of best storage.

After electromagnet 14 excitatory had been interrupted, the magnetic attraction in the air gap between pole-face 54 and blade 38 disappeared, and the mechanical energy that is stored in the

spring

58,60 is recovered as follows:

Left spring 58, it when contact point arm 30 clockwises change, plays a part not make

contact

20,22 to cling between the bonding pad 43 and another right spring 60 of blade 38.Short spring 58 has bigger hardness than long spring 60.The elongation of first left spring 58 is used for destroying microbonding (micro-welds), and another right spring 60 is realized separating fully of blade 38, and makes moving contact 20 to another settling position swing, pushes down fixed contact 24.

In each stable state of movable contact 20, can notice at contact point arm 30 and shake accordingly between the driving

nose

64,66 of part 44 has the gap of presetting.This gap exist in transition status the time produce the row impact effects, thereby increased the every group of

contact

20,22 during the elongation state of spring 58; 20,24 places destroy the effect of welding.

Fig. 2 is to the switching relay 10 that Figure 5 shows that Fig. 1 that test button 70 is housed, in control button the place ahead, and contact 20,22; 20,24 position indicating device 72 moves.Manually operated test button 70 passes the hole 74 of the front 76 of housing 12, its effect is mechanically to play in the moving vane 38 along the direction of shifting to polarization surface 54, make and transmit an oscillating motion, so as to whenever by single test button 70 time, realizing the state exchange of moving contact 20 to shaking part 44.

In test button 70 inside, one optical prism 78 is arranged, it be securely fixed in position transducer 80 co-ordinations on the blade 38, first colour-coded 82 is arranged on the transducer 80, occupy two extreme positions along prism 78 moving linearlies according to the position of blade 38.

Test button 70, prism 78, transducer 80 and return spring 86 are installed in the support 88 that is attached at housing 12 securely, and second colour-coded 84 is arranged on the support 88, and it is colored different with first mark 82.

In " disconnection " position of Fig. 2, corresponding to the inactive state of electromagnet 14, open the contact the 20, the 22nd of first group of contact, and second group of contact the 20, the 24th is closed.First mark 82 of transducer 80 is facing to the inclined-plane of prism 78, and it is the head of the colour reflective of first mark 82 to prism 78.

After electromagnet 14 excitation, contacts status converts " connections " position of Fig. 4 to, and the magnetic attraction of 38 pairs of yokes 40 of blade moves down transducer 80, and second mark 84 of different color is faced the inclined-plane of prism 78, by means of the reflection of light beam towards the front.

In two positions of Fig. 3 and Fig. 2, test button 70 is not pressed, thereby because the effect of compression-type return spring 86 keeps lifting shape.

With reference to figure 6 and Fig. 7, manually push the test button 70 in the hole 74, make the state that part 44 forces to wave and change the contact that shakes.In this case, then incorrect by the signal that indicating device 72 provides, because, will cover the head of prism 78, on test button 70 so be sightless as long as operator's hand is pushed.

Obviously, indicating device 72 and test button 70 can not depart from the scope of the present invention down differently setting.Another embodiment obviously can use the transducer of elongated prism and two kinds of different colors.When electromagnet was energized, indicating device moved, thereby showed its second kind of color 92.

Claims

1. one kind is contained in the interior electromagnetic relay of insulation shell (12), comprising:

Electromagnet (14) with ferromagnetic blade (38) of pivotal mounting,

Operating mechanism (16) has and is installed in axle and shakes part (44) on (46), between position, two level end angles, waves,

Be attached at the controls on the blade (38) securely, and shake part (44) collaborative work, in each manipulation cycle of blade (38), make and shake part (44) and move on to another position from a position,

Power circuit (18), what have the bistable state that driven by wobble-member (44) waves contact (20), it at least with a fixed contact (22,24) collaborative work,

Flexible apparatus (56) is used for making blade (38) turn back to disconnected position when electromagnet is static, it is characterized in that:

Described controls comprises and is connected blade (38) and shakes connecting rod (48) on the part (44), so that form a permanent direct connection, connecting rod is shaking tie point (50) on the part (44) with respect to waving axle (46) biasing.

2. electromagnetic relay according to claim 1, it is characterized in that, the return mechanism of described flexibility (56) comprises a pair of compression spring (58,60), one after the other act under the lower surface of blade (38), and stretch to described connecting rod (48) in parallel with each other along the direction that is approximately perpendicular to blade (38).

3. electromagnetic relay according to claim 1, it is characterized in that the front of housing (12) comprises a hole (74), be used for the test button that shakes part (44) (70) by manual control, in test button (70) the inside, contact position indicating device (72) is housed.

4. electromagnetic relay according to claim 3, it is characterized in that, described indicating device (72) comprises an optical prism (78), with transducer (a 80) collaborative work that is securely fixed on the blade (38), described transducer has a signal mark (82 at least, 92), be in the inclined-plane collaborative work of attraction or disconnected position and prism (78) according to blade (38).

5. electromagnetic relay according to claim 3 is characterized in that, described indicating device (72) comprises the mark (82,84) of two different colors, and described prism (78) is used for reflecting along the direction of front the column of colour of each mark (82,84).

6. electromagnetic relay according to claim 4 is characterized in that, between the front of blade (38) and housing (12) spring (86) is arranged, and is used for the position that forces test button (70) to lift, thereby makes the operation of indicating device (72) reliable.

7. electromagnetic relay according to claim 2 is characterized in that, short first spring (58) that is positioned between connecting rod (48) and second spring (60) is bigger than the hardness of described second spring.