EP0053194B1 - Dispositif de contacts - Google Patents

Dispositif de contacts Download PDF

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Publication number
EP0053194B1
EP0053194B1 EP80107448A EP80107448A EP0053194B1 EP 0053194 B1 EP0053194 B1 EP 0053194B1 EP 80107448 A EP80107448 A EP 80107448A EP 80107448 A EP80107448 A EP 80107448A EP 0053194 B1 EP0053194 B1 EP 0053194B1
Authority
EP
European Patent Office
Prior art keywords
contact
guide body
movable
making device
movable guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80107448A
Other languages
German (de)
English (en)
Other versions
EP0053194A1 (fr
Inventor
Reiner Lüdorf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Square D Starkstrom GmbH
Original Assignee
Square D Starkstrom GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Square D Starkstrom GmbH filed Critical Square D Starkstrom GmbH
Priority to DE8080107448T priority Critical patent/DE3070654D1/de
Priority to EP80107448A priority patent/EP0053194B1/fr
Priority to AT80107448T priority patent/ATE13372T1/de
Priority to ES507028A priority patent/ES507028A0/es
Priority to DK505881A priority patent/DK505881A/da
Priority to US06/321,894 priority patent/US4368450A/en
Priority to AU77577/81A priority patent/AU542311B2/en
Priority to CA000390780A priority patent/CA1169111A/fr
Priority to BR8107671A priority patent/BR8107671A/pt
Priority to NO814061A priority patent/NO814061L/no
Publication of EP0053194A1 publication Critical patent/EP0053194A1/fr
Application granted granted Critical
Publication of EP0053194B1 publication Critical patent/EP0053194B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/10—Compensation for variation of ambient temperature or pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members

Definitions

  • the invention relates to a contact device with a longitudinally displaceable plunger and movable contact pieces which can be actuated by the latter and which cooperate with fixed contact pieces to form openers and / or closers.
  • Contact devices of the type mentioned are known in many different constructions and different areas of application.
  • An example is relays or thermal overcurrent releases, for which the invention is preferably used.
  • the invention can be used in all contact devices in which creeping or slow movements for actuating the contact device can occur and in which sudden switching is nevertheless desired and to be effected.
  • the contact pressure between the touching movable and stationary contact pieces is dependent on the actuation stroke or on the switching path, ie. H. the contact pressure decreases during the switchover path until the value zero is reached, i.e. there is practically no contact pressure, and only then does the switchover take place with the contact open. This results in significant disadvantages, in particular unsafe contact making and insufficient vibration resistance in many operating conditions.
  • a switch with snap-action switching mechanism in which the aim is to maintain the contact pressure completely until the time of the switchover, and then to immediately regain the full size of the contact pressure after the switchover in another direction.
  • the known switch has a longitudinally displaceable plunger, to which a pivotably mounted angle lever is articulated. A rocker arm that can be moved between two stops is supported on this angle lever.
  • the switch has a contact tongue which is provided at one end with an electrical connection part and at the other end with movable contact pieces. Depending on the position of the contact tongue, the movable contact pieces interact with one or the other of the two fixed contacts.
  • a tension spring is tensioned between the distal ends of the rocker arm on the one hand and the contact tongue on the other.
  • This tension spring has two tasks, namely to switch the spring switch including the contact tongue when switching the plunger and also to generate the contact pressure not only in the two end positions of the contact tongue, but also during the switching process.
  • the size of the contact pressure generated exclusively by the tension spring is determined by the respective tensile force of the spring and the angle between the line of action of the tension spring and the contact tongue. The smaller this angle during the switching process, the smaller the already very small force component, which can act as contact pressure.
  • the tension spring is pulled further apart by pivoting the angle lever and the rocker arm, thereby increasing the tensile force.
  • the invention has for its object to provide a contact device in which a reliable contact is guaranteed and which is vibration-proof, especially when operated automatically or mechanically.
  • the plunger has a guide extending transversely to its direction of displacement for a movable guide body, that the guide body is attached to an articulation member, that the articulation member articulates in the region of the knee of an elbow that between the guide body and One leg of the angle piece is provided with a tension spring, that the angle piece is pivotably mounted by means of the other leg, and that the stationary guide body is assigned to the movable guide body and the arrangement is such that the movable guide body is moved in one direction along the path during the switchover one side and in the other direction along the other side of the fixed guide body.
  • the contact device when the contact device is actuated, an unwanted early switching cannot take place because the plunger is immovably held or locked up to precisely defined positions.
  • These precisely defined positions are not determined by the position of the tension spring, but by the mutual position of the movable and the fixed guide body.
  • the tension spring in the contact device according to the invention has no influence whatsoever on the size of the contact pressure, because this can be generated in a conventional manner by separate contact pressure springs.
  • the advantages achieved by the invention are thus essentially to be seen in the fact that a high contact pressure is maintained during the actuation stroke or the switchover path until immediately before the switchover. This results in a safe contact.
  • the contact device is vibration-proof in all operating conditions, in particular also in the case of automatic or mechanical actuation.
  • the contact device according to the invention is also suitable for low electrical voltages of, for example, 24 volts.
  • Figure 1 of the drawing relates to the prior art, specifically on the course of the contact pressure during the switching path.
  • the contact pressure is plotted in Newtons on the vertical coordinate 1, while the switchover path is plotted in millimeters on the horizontal coordinate 2.
  • the contact pressure between a movable and a fixed contact piece in the switched-on state is 0.5 N, specifically along line 3.
  • the contact pressure is up to dropped to about half.
  • the contact pressure drops further according to line 7 and reaches a value of zero after a switchover path of, for example, 0.7 mm at switchover point 4.
  • the contact (normally closed) is therefore opened under a very low contact pressure that goes to zero. After opening, a contact pressure 5 of a closer is created. During the decreasing switchover path according to the dashed line 8, this contact pressure also drops again to a value of zero up to the switchback point 6 of the make contact. When switching over, contact pressure 9 of the break contact is created again. These changes in contact pressure are repeated during the to-and-fro switch path 10.
  • Figure 2 clearly illustrates the course of the contact pressure in a contact device according to the invention. It can be seen that the contact pressure in the contact device remains the same in the cold state according to line 3 over the switchover path 10 to the switchover point 13 of the opener. After switching, a contact pressure 12 of the closer is obtained, which corresponds to the previous contact pressure 11 of the opener. Here, too, the contact pressure 12 remains the same over the decreasing switchover path corresponding to the dashed line up to the switchover point 14, and after the switchover there is again a contact pressure 15 of the break contact, which corresponds to the contact pressure 11 at the switchover point 13.
  • Figures 3 to 7 illustrate the construction principle of a contact device according to the invention with a longitudinally displaceable plunger 34 which is held in guides 35, 36.
  • This plunger 34 is used to actuate movable contact pieces 39 and 40, which interact with fixed contact pieces 37 and 38.
  • the contact pieces 37, 39 represent a closer and the contact pieces 38, 40 represent an opener.
  • the plunger 34 has a guide 32, 33 running transversely to its direction of displacement on both sides of a movable guide body 28.
  • This guide body 28 for example in the form of a small block, is attached to one end of a link 27, which in turn articulates with the other end in the region of the knee 18 of an elbow.
  • the contra-angle consists essentially of two legs 16 and 17 which are at right angles to one another and which are rigidly connected to one another in the region of the knee 18.
  • a tension spring 31 is provided between the guide body 28 and the outer end of one leg 17 of the angle piece. The articulation point of the tension spring at the outer end of the leg 17 is given the reference numeral 30.
  • the elbow is on by means of the other leg 16 the outer end of which is pivotally mounted.
  • the reference number 19 denotes the pivot axis of the fixed bearing.
  • the movable guide body 28, as the drawing shows, is assigned a fixed guide body 29 in such a way and, moreover, the design and arrangement of the above-described components is such that the movable guide body 28 during the switchover path in one direction along one side and in the other Direction along the other side of the fixed guide body 29 is guided.
  • the tension spring 31 is arranged between the guide body 28 and the articulation point 30 of the leg 17 of the elbow so that its central axis with the center lines of the leg 17 and the articulation member 27 in the two end positions of the switching path according to FIGS. 3 and 7 on the one hand and FIG. 5 on the other hand forms roughly equal obtuse-angled triangles.
  • an actuating lever 20 engages by means of an articulated connecting member 21.
  • the joints at the ends of the connecting member 21 are provided with the reference numerals 22 and 23.
  • a return spring 24 acts on the angle piece, and also expediently also on the leg 16, which can be designed as a compression spring or tension spring, depending on the side arrangement.
  • the return spring 24 abuts a support 25 and is attached to the articulation point 26 of the leg 16.
  • the movable contact pieces 39, 40 are attached to springs, preferably to leaf springs 41, 42, which in turn are fastened in holders 43, 44 with suitable power line connections.
  • the operation of the contact device described above is essentially as follows.
  • the operating position of the contact device according to FIG. 3 is assumed.
  • the pressure of the return spring 24 causes the angle piece with the legs 16, 17 to pivot out, furthermore the actuating lever 20 with the connecting member 21 and the articulation member 27 with the movable guide body 28 into the left end position, which is limited by the stop.
  • the tension spring 31 extends below the knee 18 of the elbow and generates a force component parallel to the direction of displacement of the plunger 34, so that the movable guide body 28 held in the guide 32, 33 presses the plunger 34 downward, so that the contact between the contact pieces 38 , 40 is closed and open between the contact pieces 37, 39.
  • the angle piece is pivoted clockwise around the pivot axis 19 and the articulation point 30 of the tension spring 31 moves obliquely upward in the direction of arrow 45.
  • the return spring 24 is compressed and the movable guide body 28 slides along the underside of the fixed guide body 29 with a part elongated perpendicular to the image plane via the guide 32, 33, which is otherwise arranged so that it does not move the guide 32, 33 with special needs.
  • an undesired early switching cannot take place and the contact pressure exerted by the leaf spring 42 between the contact pieces 38 and 40 remains unchanged.
  • the tension spring 31 Due to the pivoting movement of the angle piece about the pivot axis 19, the tension spring 31 finally reaches a position that goes beyond the central position according to FIG. H. the tension spring 31 runs above the knee 18 of the elbow. This results in an opposite force component, namely upwards, but this can only have an effect when the movable guide body 28 is displaced to the right so far that it is released from the fixed guide body 29. At this moment there is a sudden changeover, that is to say opening of the contact pieces 38, 40 and closing of the contact pieces 37, 39. The plunger 34 has shifted upwards in accordance with FIG. 5.
  • the exemplary embodiment of a contact device according to the invention shown in the diagram in FIG. 8 is based on the same principle which has been explained with reference to FIGS. 3 to 7.
  • a housing 46 which can be closed by a cover (not shown) or the like.
  • An angle piece 47 with two legs running at right angles to one another is mounted on a pivot axis.
  • the tension spring 50 engages on the articulation point 49 and on the other hand on the movable guide body 51.
  • the movable guide body 51 is held in a guide 62 running transversely to the direction of displacement of the plunger 59.
  • the fixed guide body is provided with the reference number 52.
  • the articulation member 53 engages in a bearing 54 which, for example, as Notch is shown.
  • the plunger 59 has an arm 60 which is extended downwards and which interacts with the U-shaped bent leaf spring 76 of the movable contact piece 77. Accordingly, the arm 61 of the plunger, which leads upward, actuates the U-shaped bent leaf spring 70 of the movable contact piece 71 that you can see the respective operating position of the contact device from the outside.
  • the operating position is shown, which corresponds to Figure 5, i. H.
  • the tension spring 50 forms an obtuse-angled triangle with the center lines 55, 56 of one leg of the angle piece 47 and of the articulation member 53.
  • the angle piece 47 is held in its swivel range between stops 57 and 58, the stop 57 being held on a bolt 95.
  • the plunger 59 is expediently guided on both sides between guide pieces 65, 66.
  • a return spring 65 acts on the angle piece 47 again.
  • the special feature of this return spring is that it is adjustable with one end in an internal thread of a return spring holder 68.
  • the internal thread is expediently adapted to the profile of the return spring windings with respect to the thread grooves.
  • the spring end 69 is bent in a straight line so that it runs diagonally with respect to the last spring turn. As a result, the return spring can be adjusted by simply turning it and, at the same time, attacking it with a suitable tool.
  • the movable contact pieces 71 and 77 are again opposite fixed contact pieces 72 and 78, which are guided with the aid of power connection rails 73 and 79 to conventional power connections 75 and 80.
  • the U-shaped current-conducting leaf springs 70, 76 are also extended to power connections 74 and 81.
  • an actuating lever 86 again acts on the angle piece 47, with the interposition of a connecting member 83, the articulation point on the angle piece with the reference number 82 and the articulation point on the actuation lever 86 with the reference number 85 is provided.
  • the connecting member 83 is advantageously provided with a spring 84, in the present exemplary embodiment with a tension spring, which dampens the transmission of switching forces.
  • the exemplary embodiment according to FIG. 8 has another special feature, namely that the actuating lever 86 interacts with a compensation bimetal 89, 90.
  • the compensation bimetal is designed to be angled and pivotally held in a holder at the angled point.
  • the bracket consists, for example, of a cylindrical pin and a counterpart, between which a slot is left for inserting the compensation bimetal.
  • the compensation bimetal lies with one leg 89 on one end 88 of the actuating lever 86 and with the other leg 90 on an adjusting device, which can consist, for example, of a bolt 93 with a thread and an adjusting wheel 94.
  • the compensation bimetal with the adjustment device allows a sensitive adjustment of the actuation lever 86 when the contact device is operated automatically or mechanically. It is easy to see that when the bolt 93 is screwed down, the leg 89 of the compensation bimetal swings out with its lower end to the right in the image in FIG. 8, thus causing the actuating lever 86 to pivot about the articulation point 85, so that the lower end of the actuating lever 86 is pivoted closer to the actuating element, not shown, acting in the direction of arrow 87, so that the switchover takes place earlier, while, when the adjustment device is reversed, the switchover takes place later.
  • the bolt 93 is guided in a nut 96 provided with an internal thread, which in turn is held rotatably in a sliding seat 97 of the housing 46.
  • the housing 46 is also equipped with a fixed stop 98 projecting up to the level of the setting wheel 94. This cooperates with a projection 99 which is fixedly connected to the setting wheel 94.
  • the principle of operation is as follows. To adjust the setting wheel 94 is first rotated so far that the projection 99 abuts the stop 98. Then the adjusting wheel 94 is moved with the bolt 93 by turning the nut 96 downwards or after the leg 90 of the bimetallic compensation strip. In the correct desired position, the mother is z. B. attached by gluing, clamping or welding relative to the housing 46.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Lock And Its Accessories (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
  • Non-Reversible Transmitting Devices (AREA)
  • Switches With Compound Operations (AREA)
  • Contacts (AREA)
  • Table Devices Or Equipment (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Breakers (AREA)
  • Prostheses (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Mechanisms For Operating Contacts (AREA)

Claims (11)

1. Dispositif contacteur comprenant un poussoir (34 ; 59), déplaçable suivant la longueur et des éléments de contact (32, 40, 71, 77) mobiles, actionnés par ce poussoir, qui coopèrent pour former des organes d'ouverture et/ou de fermeture avec des pièces de contact fixes (37, 38 ; 72, 78), caractérisé en ce que le poussoir (34 ; 59) comporte un guidage (32, 33 ; 62) dirigé transversalement par rapport à sa direction de déplacement pour un corps de guidage (28 ; 51) mobile, que le corps de guidage (28 ; 51) est monté sur un élément de liaison (27 ; 53), que l'élément de liaison (27 ; 53) est rattaché de manière articulée à une pièce coudée (16, 17 ; 47) dans la région du coude, qu'entre le corps de guidage (28 ; 51) et une branche (17) de la pièce coudée il est prévu un ressort de traction (31 ; 50), que la pièce coudée (16, 17 ; 47) est montée à pivotement au moyen de l'autre branche (16) et qu'il correspond au corps de guidage mobile (28 ; 51) un corps de guidage fixe (29 ; 52) de telle façon et que la disposition est arrangée de manière que le corps de guidage mobile (28 ; 51) soit guidé pendant le trajet de commutation dans une direction le long d'un côté et dans une autre direction le long de l'autre côté du corps de guidage fixe (29 ; 52).
2. Dispositif contacteur selon la revendication 1, caractérisé en ce que le ressort de traction (31 ; 50) est disposé entre le corps de guidage mobile (28 ; 51) et la branche (17) de la pièce coudée (16, 17 ; 47), de façon que son axe médian forme, avec les lignes médianes (55, 56) de cette branche (17) et de l'élément d'articulation (27 ; 53), dans les deux positions d'extrémité du trajet de commutation (10), des triangles à angle obtus sensiblement égaux.
3. Dispositif contacteur selon la revendication 1 ou 2, caractérisé en ce qu'un levier d'actionnement (20 ; 86) attaque la pièce coudée (16,17 ; 47) au moyen d'un élément de jonction (21 ; 83) fixé avec articulation.
4. Dispositif contacteur selon l'une des revendications précédentes, caractérisé en ce que des butées (57 ; 58) sont prévues pour limiter le mouvement de pivotement de la pièce coudée (16, 17 ; 47).
5. Dispositif contacteur selon la revendication 3 ou 4, caractérisé en ce que l'élément de liaison (83) est pourvu d'un ressort (84).
6. Dispositif contacteur selon l'une des revendications précédentes, caractérisé en ce qu'un ressort de rappel (24 ; 67) agit sur la pièce coudée (16, 17 ; 47).
7. Dispositif contacteur selon la revendication 6, caractérisé en ce que le ressort de rappel (67) repose de manière déplaçable par une extrémité dans un filetage intérieur d'un support (68) d'un ressort de rappel.
8. Dispositif contacteur selon l'une des revendications précédentes, caractérisé en ce que les pièces de contact mobiles (39, 40 ; 71, 77) sont montées sur des ressorts à lame (41, 42 ; 70, 76).
9. Dispositif contacteur selon l'une des revendications 3 à 8, caractérisé en ce que le levier d'actionnement (86) coopère avec un élément bimétal compensateur (89, 90).
10. Dispositif contacteur selon la revendication 9, caractérisé en ce que l'élément bimétal (89, 90) est constitué sous une forme anguleuse, est maintenu dans un support de façon à pouvoir pivoter et est appliqué par une branche (89) contre le levier d'actionnement (96) ainsi que par l'autre branche (90) contre un dispositif de manoeuvre (93, 94).
11. Dispositif contacteur selon la revendication 10, caractérisé en ce que le dispositif de manoeuvre est constitué par une roue de réglage (94) avec un boulon (93) et un écrou (96), en ce que le boîtier (46) est pourvue d'une butée (98) et la roue de réglage (94) est pourvu d'une saillie (99) et en ce que l'écrou (96) est maintenu dans un siège glissant (97) du boîtier (46).
EP80107448A 1980-11-28 1980-11-28 Dispositif de contacts Expired EP0053194B1 (fr)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE8080107448T DE3070654D1 (en) 1980-11-28 1980-11-28 Contact device
EP80107448A EP0053194B1 (fr) 1980-11-28 1980-11-28 Dispositif de contacts
AT80107448T ATE13372T1 (de) 1980-11-28 1980-11-28 Kontaktvorrichtung.
ES507028A ES507028A0 (es) 1980-11-28 1981-11-11 Dispositivo de contacto electrico.
DK505881A DK505881A (da) 1980-11-28 1981-11-16 Kontaktindretning
US06/321,894 US4368450A (en) 1980-11-28 1981-11-16 Contact arrangement
AU77577/81A AU542311B2 (en) 1980-11-28 1981-11-17 Contact arrangement
CA000390780A CA1169111A (fr) 1980-11-28 1981-11-24 Commutateur a declenchement alternatif avec dispositif de compensation thermique
BR8107671A BR8107671A (pt) 1980-11-28 1981-11-25 Dispositivo de contato
NO814061A NO814061L (no) 1980-11-28 1981-11-27 Kontaktanordning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80107448A EP0053194B1 (fr) 1980-11-28 1980-11-28 Dispositif de contacts

Publications (2)

Publication Number Publication Date
EP0053194A1 EP0053194A1 (fr) 1982-06-09
EP0053194B1 true EP0053194B1 (fr) 1985-05-15

Family

ID=8186910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107448A Expired EP0053194B1 (fr) 1980-11-28 1980-11-28 Dispositif de contacts

Country Status (10)

Country Link
US (1) US4368450A (fr)
EP (1) EP0053194B1 (fr)
AT (1) ATE13372T1 (fr)
AU (1) AU542311B2 (fr)
BR (1) BR8107671A (fr)
CA (1) CA1169111A (fr)
DE (1) DE3070654D1 (fr)
DK (1) DK505881A (fr)
ES (1) ES507028A0 (fr)
NO (1) NO814061L (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531577A1 (fr) * 1982-08-09 1984-02-10 Marechal Sepm Contact electrique a pression a pouvoir de fermeture et d'ouverture incorpore
FR2602908B1 (fr) * 1986-08-14 1993-09-24 Telemecanique Electrique Dispositif de commutation a double percussion, utilisant un dispositif a depassement de point mort
JP6637683B2 (ja) * 2015-06-19 2020-01-29 東芝三菱電機産業システム株式会社 回転電機

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729714A (en) * 1950-10-21 1956-01-03 Frederick J Broch Double snap action switch
DE6601389U (fr) * 1968-11-22 1969-03-06 Honeywell Gmbh
DE2047757C3 (de) * 1970-09-29 1979-04-05 J. & J. Marquardt, 7201 Rietheim Elektrischer Schnappschalter
DE2152483A1 (de) * 1971-10-21 1973-04-26 Walter Beck Sprungschaltwerk
GB1441601A (en) * 1972-08-01 1976-07-07 Inter Control Koehler Hermann Temperature regulator
DE2242142A1 (de) * 1972-08-26 1974-03-07 Bbc Brown Boveri & Cie Ueberstromausloeser mit kraftspeicher fuer einen elektrischen schalter, insbesondere leistungsschalter

Also Published As

Publication number Publication date
DE3070654D1 (en) 1985-06-20
AU7757781A (en) 1982-06-03
AU542311B2 (en) 1985-02-14
ATE13372T1 (de) 1985-06-15
DK505881A (da) 1982-05-29
ES8302355A1 (es) 1983-02-01
US4368450A (en) 1983-01-11
NO814061L (no) 1982-06-01
CA1169111A (fr) 1984-06-12
ES507028A0 (es) 1983-02-01
BR8107671A (pt) 1982-08-24
EP0053194A1 (fr) 1982-06-09

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