FR2618599A1 - RELAY - Google Patents

Abstract

The invention relates to a relay comprising a magnetic assembly provided with a core 1, a yoke 2, a coil 3A and a pallet 6, as well as a set of contacts 10a, 11a, 12a placed on respective supports 10, 11, 12. In order to obtain interchangeability at will, the magnetic assembly 1-8 and the contact assembly 9-13 are made in the form of independent and modular units which can be connected to one another. with the other.

Description

The present invention relates to a relay comprising a magnetic assembly

  having a core, a yoke, a spool and a pallet and a set of contacts having contacts held in a contact carrier body and at least one of which

  be operated using the pallet.

  In known relays of this type, the magnetic assembly is mounted on a base body also serving as a contact support and the pallet of the magnetic assembly is connected with the set of contacts via a comb. hooking

  in a recess of the pallet and in which

che at least one contact spring.

  In this respect, it has the disadvantage that for each set of contacts, only a particular magnetic set can be used - and vice versa. So

  it is generally not possible to use a set of

  Magnetic bleed for different sets of contacts so that the series sizes of these relays

  known remain limited in correspondence.

  The object of the invention is to remedy this drawback and to create a relay of the aforementioned type in which the set of contacts and the set

  Magnetic are interchangeable at will.

  According to the invention, this problem is

  solved by the fact that the magnetic set and the set

  The plurality of contacts are each arranged as independent units that can be interconnected. In this way, it is possible to use,

  for different sets of contacts or different agencies-

  plugs for conductive plate relays of magnetic assemblies which are either identical or different. It is thus possible to replace the two sets one by the other in adaptation to the different conditions imposed on the relay structures which are

  always of different types or specifications.

  According to another feature of the invention, it is possible to arrange for the coil housing of the magnetic assembly to be connected, without the possibility of relative rotation, with a support body of

contact set contacts.

  This not only allows good insulation

  between the magnetic assembly and the assembly

  ble of contacts also in the case of a structure

  very compact construction, but also a

  very simple cation of the corresponding coupling between the magnetic assembly and the set of contacts, which can be constituted simply for example by corresponding elastic appendages provided on one of the components, made in most cases of plastic, and corresponding stop lugs, which

  establish a snap connection.

  In this regard, it may be provided according to another particularity of the invention, that the snap connection between the coil casing and the contact support body is established by projections disposed on the coil casing and elastic branches. protruding from the contact support body and which, when the coil housing is coupled with the contact support body, are hooked back by the projections of the housing, which also creates a fixation in an axial direction. In this way, a very secure formula is obtained and fixing the position of the various components

in any direction.

  In addition, in the case of a relay where the pallet is pushed by means of a spring against a support edge of the cylinder head, it is also possible for the pallet spring to be maintained in the coil housing.

  using a snap connection.

  This allows a correct arrangement of the pallet spring and consequently a corresponding attachment of the pallet with respect to the casing

of coil.

  According to another feature of the invention, it is possible to arrange guides in the coil housing for receiving the magnetic assembly and which also comprise stops and / or slots,

  cooperating with projections of the magnet assembly

  tick, including the bolt, and which define the position of the magnetic assembly in the direction

axial of the coil casing.

  This ensures an exactly defined position of the magnetic assembly in the bobbin case.

  In the case of a relay having a

  In order to obtain a very simple coupling with the magnetic assembly, it is possible to have on one of the branches of the pallet a coupling part provided with a slot oriented perpendicularly to the direction of movement of this blade. branch and in which attaches, preferably with play, a contact spring when the casement of

  coil is coupled with the contact support body.

  In this regard, to increase the vibration resistance of the relay, it is possible to ensure that the portion comprising the slot is movably arranged relative to the pallet in which case it is ensured, at

  means of corresponding stops, to obtain a

  by the combination of shapes in the direction of traction of the pallet and to obtain, in the direction of descent of the pallet a drive of this pallet by friction under the action of the spring of

  contact that is coupled with it.

  By this means, it is ensured that, during the descent of the pallet, the kinetic energy stored in it is practically not transmitted to the contact spring but is instead, during the movement of the pallet after the application of the movable contact against the corresponding fixed contact, absorbed or converted into heat by friction between the part comprising the slot and the pallet, thereby avoiding a rebound of the movable contact initiated by the pallet. In addition, the alternation of edge of the slot, caused by the inertia weight of the pallet, after the impact of the moving contact against the

  fixed contact, opposes a rebound of the contact.

  Other features and benefits of

  the invention will be highlighted in the description

  which will follow, given by way of non-limiting example, with reference to the appended single drawing which represents in

  exploded view a relay according to the invention.

  The core 1 of the magnetic assembly passes through the coil body 3 provided with the coil 3a and is connected to the yoke 2 preferably by riveting the pallet 6 is mounted in the assembly condition on the bearing edge 2a of the 2. This edge has a rounded and it represents a portion of a cylindrical envelope substantially accurate. This is performed, following the punching of the cylinder head in a corresponding sheet, by the formation of a footprint 2b in an area near the edge, using a suitable shape to avoid the creation of a bulge

  of the frontal surface. We thus obtain a position-

  the pallet 6 and therefore only a low friction between it and the pallet 6.

support edge 2a.

  On the yoke 2 is fitted an insulating cap 4, which forms a third insulating layer between the coil 3a and the contacts 10a, 11a and 13a, or their support. The other two insulating layers are constituted by the coil body 3 or by its cheek and the coil housing 5, which has a closed bottom and in which is engaged the magnetic assembly, including the insulating cap. Due to the three-layer structure of the insulation, it is possible to reduce its total thickness, which is particularly advantageous

  in the case of small relays with conductive plates.

  On the bobbin case 5 is arranged a guide profile 5d as well as slots 5a, the limits of which serve as abutments for the projections 2c of the

cylinder head 2.

  The recesses at the end of

  5 of the coil casing 5 have a counter-profile in relation to the profile of the different projections provided on the front side of the debobine body 3 and are arranged to receive the connection plugs 3b of the coil 3a.

and their output conductors.

  The projections 5c and 5e are used to receive and hold the pallet spring 8, which comprises two symmetrical bearing lips 8b, interconnected by

  the intermediary of the soul 8a and which are provided with

  stoppages 8d. These stop recesses 8d cooperate

  with stop lugs Sf arranged on the inner side

  5c, which have a sawtooth shape and which move obliquely in the direction of thrust of the pallet spring 8 into the slot remaining between the projections 5c and 5e. Thus, during the thrust of the armature spring 8, a hooking of the stop lugs of the bobbin casing in the stop recesses 8d of the pallet spring 8. Thus the pallet spring is firmly held in the

bobbin case.

  The central lip of the pallet spring 8 serves as a positioning spring 8c and is engaged in a recess 6f of the pallet 6, which is provided with a bulge 6c formed by impression and against which the positioning spring 8c

  a setback. As a variant, the position spring

  8c could also have a straight profile. The positioning spring 8c clings below the bearing edge 2a of the yoke 2 and exerts on it a small pair tending to push towards

  back the pallet towards its low position.

  Since the width of the portion of the positioning spring 8c that clings into the cavity 6f corresponds to the width of the cavity, the pallet spring 8 or its positioning spring also serve, in addition to the application of the pallet 6 against the support edge of the cylinder head 2, also to the fixing in position of the pallet in the direction

of the bearing edge 2a.

  The branch of the L-shaped pallet 6, which is applied against the yoke 2 or against a wall of the

  coil housing 5 which is parallel thereto, comprising

  a protuberance 6a made of plastic. This pro-

  tubération 6a is provided, at its end opposite to the wedge zone formed by the two branches of the pallet, with an appendage 6b having in cross section a shape of

  T and on which can be engaged a coupling part-

7.

  This coupling portion 7 has a T-shaped groove 7a, open at the edge only on the side facing the spool casing 5, and it can be engaged on the appendix 6b so that this appendage is hooked into the groove 7a. To facilitate the mounting of the coupling part 7, it comprises stopper pins 7b which engage in corresponding recesses, in which case however the recesses allow relative movement of the coupling part 7 with respect to Appendix 6b and have, in the longitudinal direction of the T-shaped appendix 6b, in correspondence a longer length.

  large than that of the stitches 7b.

  At the end opposite to the pallet 6, the coupling part 7 has a slot 7d, disposed between the appendices 7c and in which, in the assembly condition, comes into play with a spring 13 of a switching spring. way of his part of

extension 13th.

  Slope of sliding surfaces 6g

  of Appendix 6b as opposed to the moving direction

  the pallet is smaller than the friction angle of the selected pair of plastics and is therefore chosen so that no irreversible blocking occurs but rather a possibility of relative displacement of the appendix

  relative to the coupling part is retained.

  This ensures a drive of the coupling part 7 by the pallet 6 under the effect of the closure of the groove 7a by means of a wall in the direction of traction of the pallet 6 whereas against in the direction of descent of the pallet, it is initially driven through

  of the coupling part 7 under the effect of

  of the switching spring 13 of the pallet with

  play in slot 7d, with appendix 6b

  groove 7a. After termination of the movement of the switching spring 13 under the effect of the application of the switching contact 13a against the associated fixed contact 11a, the pallet 6 can however continue its movement because of its weight inertia and then there occurs alternation the wall of the slot 7d is applied against the spring 13, without resulting in a tension of the spring 13 under the effect of the forces exerted by the Dalette thereon. This is conditioned by the fact that, from the instant of application of the switching contact 13a against the fixed contact 11a, there is to a large extent a disengagement of the coupling portion 7 from the pallet 6 and this can continue to move in the descent direction with respect to the coupling portion. The kinetic energy of a pallet is then absorbed or converted into heat by the friction of the sliding surfaces 6g of the appendix 6b against the corresponding surfaces of the groove 7a of the coupling part 7, as well as under the effect of the friction of the coupling part 7, or its slot wall, against the spring 13 when the coupling part 7 moves towards the spring -13 under the effect of the inclination of the appendix 6b in

  opposition to the direction of movement of the pallet.

  In this way, it avoids a rebound of the switching contact 13a under the effect of weight inertia of the pallet. In addition, a rebound of a paddle 6 is prevented in relation to the retraction moment.

the spring of the pallet 8.

  Due to the possible disconnection of the pallet 6 with respect to the coupling part 7, however, the vibration resistance of the relay is also increased because, unlike the conventional relays, the pallet does not constitute with the contact spring a oscillating system closed but it is possible to have a disconnection between said parts and it can not therefore occur a

  resonance phenomenon. In addition, it occurs equally

  a distribution of the masses, so that, under

  the effect of vibrations, the energies being able to accumulate

  in the different partial masses can not

  not add up because of uncoupling.

  The magnetic assembly described above and comprising the parts 1 to 8c can thus be manufactured in the form of a separate unit independent of

the set of contacts.

  A contact support body 9 of the contact assembly has a series of slots and recesses which serve to receive the supports.

  contacts 10, 11 and 12 and which are arranged in corres-

  to the desired disposition of the cards 10c, 11c, 12c formed on them. For the anchoring of the contact supports, these comprise lob, 11b and 12b nipples, which are intended to be fitted correspondingly in slots or grooves 9a of the contact support body 9, and consequently for

  ensure a solid support of the contact supports.

  The idle contact 11a and the working contact 10a are respectively fixed directly on their supports 11 and 10. The switching contact 13a is instead fixed on a switching contact spring 13, which is in turn connected to the contact support switching 12, preferably by a

laser welding.

  The plug 12c and the portions 12d and 12e of the switch contact holder 12 are guided in narrow slots of the contact support body 9, while against the bent adjusting core 12a is placed in a larger recess of the contact housing. contact support so as to allow adjustment of the switching contact, in particular of the pressure against the rest contact, by bending of the adjusting core. In this respect, the advantage is obtained that no elastically flexible part should be bent because the contact supports 10, 11 and 12 can be made of an easily deformable material, such as for example half-hard copper or brass. So we

  However, it also avoids an influence of the

  elasticity of the contact contact spring

13 by the adjustment.

  The switching contact spring 13 itself is arranged as a double spring, between the stirrup branches 13d of which is arranged a

  elastic tongue 13f carrying the switching contact

  13a, the stirrup 13d being provided with an appendage 13e which is hooked into the slot 7d of the coupling part. For this purpose, there is provided a curved portion 13b between the clamping zone 13c and the

elastic tongue 13f.

  Due to the arrangement of the switching contact spring in the form of a double spring, it is possible to arrange the working contact as a rigid contact because the overshoot can be absorbed by the elastic tongue 13f, which can

  to bend elastically with respect to the stirrup 13d.

  In addition, for the switching contact spring 13 shown, a wear reserve is also obtained.

  which is established by Appendix 13e, also

  flexible, stirrup 13d. Thus, by comparison

  its a conventional structure of a relay having a resilient working contact, it is possible to achieve savings in parts because it eliminates the stroke limitation that is necessary in the case of

elastic working contacts.

  The set of contacts previously described and comprising the parts 9 to 13 can thus also be

  in the form of a separate and independent unit

of the magnetic assembly.

  The connection of the magnetic assembly with the set of contacts is established, in the exemplary embodiment shown, in that the coil housing 5 of the magnetic assembly has stop lugs 5b on its outer wall, which cooperate with the elastic branches 9b of the support body of

  contacts 9 of the set of contacts. When engaging

  5 of the spool casing 5 in the guide provided for it and constituted by the projections 9c and 9d, the branches 9b are deflected laterally by the stop lugs 5b and reapplied again, after crossing these stop lugs, against the wall of the coil housing being hooked from behind by said lugs. It is thus ensured to obtain a relative position exactly defined by this snap connection. Another precise definition of this position is established by the engagement of the lid 14

on the relay.

  Alternatively, the spool housing 5 could be provided with grooves for guide springs of the contact support body, grooves along which the set of contacts could be fitted without the possibility of relative rotation on the magnetic assembly and could be fixed for example with

this one by gluing.

  The invention has been described above in relation to

  However, the invention is not limited to this type of relay. In the same way, it is possible to apply the invention, for example also to a contact relay working

or at rest contact.

Claims (8)

  Relay comprising a magnetic assembly comprising a core, a yoke, a coil and a pallet and a set of contacts having contacts held in a contact carrier body and at least one of which can be actuated by means of the pallet, characterized in that the magnet assembly (1-8c) and the set of contacts (9 -13)   are respectively organized as independent units   which can be connected to each other.   2. Relay according to claim 1, characterized in that the rod: 4 of the coil (S.) of the magnetic assembly (1-8c) can be connected, without the possibility of relative rotation, with a contact support body S15 (9) of the set of contacts.   Relay according to one of claims 1 or 2,   in which the pallet is applied by means of a spring against a bearing edge of the cylinder head, characterized in that the pallet spring (8) is held on the bobbin casing (5) by means of a connection by snapping.   4. Relay according to any one of the claims   1 to 3, characterized in that there are provided in the coil housing (S) guides for   receive the magnetic set (1, 2, 3) and which   also stop and / or slots (Sd) which cooperate with projections (2c) of the magnetic assembly, in particular the cylinder head (2) and which determine the position of the magnetic assembly in one direction axial of the coil casing (5).   5. Relay according to any one of the claims   1 to 4, characterized in that the spool casing (5) can be coupled to the contact support body (9) by means of snap connections. (Sb, 9b).   Relay according to Claim 5, characterized in that the snap connection between the coil housing (5) and the contact carrier body (9) is formed by projections (5c) arranged on the coil housing ( 5) and by elastic branches (9b) projecting from the contact support body (9) and which, when the coil housing (5) is coupled with the contact support body, are hooked from the rear by the projections (5b) of this housing, which also establishes a fixation in a axial direction.   7. Relay according to any one of the claims   1 to 6, comprising an L-shaped pallet, characterized in that a coupling part (7) provided with a slot oriented perpendicular to the direction of movement of this branch and in this slot (7d) clings, preferably with play, a spring of   contact (13) when the bobbin case (5) is accom-   plé with the support of contacts (9).   8. Relay according to claim 7, characterized in that the part comprising the slot is arranged with the possibility of displacement relative to the pallet, in which case it is ensured by corresponding stops of a drive by conjugation of shapes in the direction pulling from there pallet while, in the direction of descent of the pallet,   there is a training of the pallet by conju-   friction coefficient under the effect of the contact spring coupled thereto, and in that it is provided, for this drive resulting from friction, slip surfaces (6g) obliquely inclined preferably in opposition to the direction of movement of the pallet   (6) and whose angle to the direction of movement   the pallet is smaller than the angle of friction   the corresponding pair of materials used.