WO1988010505A1 - Perfectionnements apportes a des composants electriques - Google Patents

Perfectionnements apportes a des composants electriques Download PDF

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Publication number
WO1988010505A1
WO1988010505A1 PCT/GB1988/000445 GB8800445W WO8810505A1 WO 1988010505 A1 WO1988010505 A1 WO 1988010505A1 GB 8800445 W GB8800445 W GB 8800445W WO 8810505 A1 WO8810505 A1 WO 8810505A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
base
conductive
assembly
fingers
Prior art date
Application number
PCT/GB1988/000445
Other languages
English (en)
Inventor
Edwin Thomas Webb
Original Assignee
Ped Limited
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
Priority claimed from GB878714058A external-priority patent/GB8714058D0/en
Priority claimed from GB878716287A external-priority patent/GB8716287D0/en
Priority claimed from GB888809714A external-priority patent/GB8809714D0/en
Application filed by Ped Limited filed Critical Ped Limited
Publication of WO1988010505A1 publication Critical patent/WO1988010505A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0056—Apparatus or processes specially adapted for the manufacture of electric switches comprising a successive blank-stamping, insert-moulding and severing operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H01H50/443—Connections to coils
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/144—Stacked arrangements of planar printed circuit boards
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/20—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern
    • H05K3/202—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern using self-supporting metal foil pattern

Definitions

  • This invention concerns the construction of electrical components particularly components for mounting on printed circuit boards and the like. Whilst aspects of the invention have general applicability to the design and construction of electrical components, the invention is particularly concerned with the design and construction of miniature switches and relays for printed circuit board mounting.
  • a miniature electro-magnetically operated relay suitable for circuit board mounting is described in US Patent 4587501.
  • the particular relay described therein is a polarised electromagnetic relay having an armature assembly at each end with related contacts and permanent magnets. Energisation of the core by the passage of current through the coil produces appropriate movement of the armatures and appropriate opening and closing of the contact sets.
  • the relay is designed to fit on an insulating base through which conductive pins extend and protrude on the underside thereof.
  • the unit is thereby readily securable to a printed circuit board having an appropriate pattern of holes formed therein through which the pins extend for soldering to conductive tracks normally on the underside of the printed circuit board-
  • Figure 1 of the Patent illustrates how the relay is constructed from a large number of separate items whose juxtaposition and spacing has to be determined and controlled during manufacture.- ..Where .tiny, distances are concerned as between the pole pieces in the working gaps at opposite ends of core, manufacturing tolerances can produce wide variations in the operating characteristics of the final product and high reject rates. In addition this type of construction does not lend itself to automated assembly line techniques.
  • an insulating base on which an electrical device is to be carried is moulded onto a sheet of conductive material which has previously been stamped or otherwise cut away so as to define a plurality of components which after being partially embedded in the base material, can be cut to length and formed as by bending in one direction so as to comprise conductive pins extending from the underside of the base for attachment to a printed circuit board or the like and by bending in another direction to provide conductive members protruding from at least one other face of the moulded base, for the attachment thereto of other electrical components or parts thereof, or which can themselves form structural elements of said component.
  • the conductive sheet material is sheet metal, such as phosphor bronze, copper or brass.
  • the base may be moulded from plastics material, typically by injection moulding.
  • the position of the conductive pins (and more particularly the positions of the conductive members upstanding from the base) can be determined very precisely by means of a stamping process or the like, working on the conductive sheet material, and no reliance is placed on the moulded material for determining the relative positions of these conductive members.
  • the moulding merely serves as a support for holding the prepositioned and preformed conductive members in place.
  • the invention enables precise relative positioning of the electrically conductive members which greatly facilitates the subsequent attachment of electrical components, parts or devices to the assembly, particularly where automated assembly is to be employed. Furthermore the precise positioning of the conductive upstanding members removes one area of uncertainty as regards dimensioning, so that a wider range of tolerance on components to be mounted and connected thereto can be accommodated, if desired.
  • the invention is thus of great importance in the construction of miniature switches particularly magnetically operated switches where, because of other manufacturing restraints, the working gaps between contacts must be very small and typically require accuracies of the order of a thousandth of an inch.
  • conductive supports for fixed contacts at one end of the device and a support for a magnetically attractable arm which is to extend between the two first mentioned supports can be positioned very accurately, and the accuracy maintained during and after manufacture, so that working gaps of the order of a thousandth of an inch or so can be readily achieved using automated metal bending and cropping techniques, without the need (except perhaps for final setting up) for manual adjustment.
  • a separate sub-assembly is also formed from the sheet of conductive material, and has further components attached thereto (for example by the use of jigs) before being severed from the sheet for subsequent assembly with the main .component.
  • the sub- assembly which may for example comprise the armature/actuator of a relay, may also have a plastics part formed thereon during moulding of the insulating base.
  • Such a sub-assembly may be comparatively small, it can be accurately manufactured from the same sheet and without requiring a separate fabrication process.
  • a contact set is made up of two separate metal elements 15 and 15' between which is located an armature 14, which itself has to be carried by a further element 16.
  • the elements such as 15 and 16 include downwardly depending pin sections such as 17 which protrude through and are secured in slots in the base 12.
  • the positions of the upstanding sections 15, 15' etc. is thus determined by the positions of the slots in the base 12 and are therefore susceptible to manufacturing tolerances in the moulding of the base.
  • This approach has been found by the applicants to be highly undesirable in practice and has made it very difficult to assemble a miniature relay using automated assembly techniques. Invariably a very considerable human input to fine tune the positions of the elements and contact sets has been necessary before a relay constructed in this general way ! can be made to work.
  • a method of constructing an electrical switch having at least one movable contact and at least one fixed contact and which is adapted for mounting on a printed circuit board comprises the steps ofs-
  • conductive material may be applied as by riveting, brazing or the like, to appropriate regions of the conductive fingers before the latter are bent upwardly from the base, thus enabling the addition of the contact material to be performed in the flat.
  • a further conductive member such as an elongate conductive arm bearing a switch contact at one end
  • a further conductive member such as an elongate conductive arm bearing a switch contact at one end
  • the components which are to be secured to the fingers may themselves be formed by stamping (or other processes for material removal) from a second sheet of conductive material, so that the components are left joined to the sheet by severable limbs, and so that the second sheet can be positioned as an overlay to the first mentioned sheet, either before or after moulding of the base material, and the components which are to be secured to the conductive- fingers-in the first sheet ma be secured thereto as by riveting, brazing, welding or the like, and thereafter removed from the second sheet by severance of the joining limbs, so that the overlay can be removed to enable the first sheet to be further processed.
  • first and second sheets are in the form of elongate strips drawn from two rolls, and severable components are formed at regular intervals along the length thereof
  • the two lengths of sheet material may be fed to, overlaid at and indexed through a single work station at which at least one component in the first sheet is secured to at least one component in the second sheet, and is thereafter severed from the first mentioned sheet, to enable the second sheet subsequently to be indexed beyond the station with the component (or components) from the first sheet now attached thereto.
  • This aspect of the invention is of particular advantage where the material from which the one component is to be formed differs from that from which the other component (to which it is to be attached) is formed_
  • the direction of feed of the one sheet is not parallel to the direction of feed of the other sheet.
  • the two sheets are overlaid orthogonally.
  • a manufacturing process incorporating the invention may include two or more such stations by which different components from two or more sources can be added to the components in a primary sheet by simply indexing the latter through a series of work stations at each' ofwhich a different sheet is overlaid and a component therein is secured to the appropriate component in the primary sheet before the now joined component is severed from the overlaid sheet to enable the primary sheet to be indexed to a further work station.
  • Each sheet may be in the form of a so-called lead frame having sprocket holes (for engagement by indexing means) at intervals along the length thereof.
  • Such sheets which have also been stamped or otherwise treated to provide appropriate patterns of components at intervals along their length, may be drawn from the roll by engagement with appropriate sprocket drive means, and, at each work station, locating pins may be employed, to engage in the sprocket holes in both sheets of material, so as to accurately position the two sheets relative the one to the other at the work station.
  • the indexing sprocket holes are spaced,apart by the same distance along the length of each sheet as they are spaced apart transverse to the length direction thereof, so that at a work station at which one length of sheet material is overlaid at right angles by another length of sheet material, there is a unique position at which four indexing holes in the two lengths of sheet material are aligned at the four corners of a square, and can be engaged by four locating pins to hold the assembly of overlaid sheet material accurately in this unique position whilst a manufacturing process is performed.
  • the moulded base and intermediate assemblies of the final device are maintained in position along the length of the so-called lead frame so as to obviate the need for handling individual sub-assemblies. It is thus possible to index the moulded base and growing component structure through an automated assembly line by simply indexing the lead frame along the line through a series of work stations. To this end at least some of the components embedded in the moulded base simply comprise fingers for attaching the base to the lead frame during the manufacturing process. At the end of the process, the assembly can be removed from the lead frame by simply cutting the now redundant attachment fingers and allowing the component to become separated from the lead frame.
  • the fingers are cut at a position some distance from the edge of the base, and the sections of the fingers which remain protruding from the base are bent up (as a further operation) into recesses conveniently provided within the moulding, so as not to constitute unwanted conductive protrusions along edges of the base.
  • This is of particular importance where a cover is to be fitted to the base and is of even greater importance where the cover is to be sealed to the base as in the case of a miniature relay where it is desirable that the device is sealed within a controlled environment.
  • the moulded base is to be contained within the lead frame and supported therein by means of a plurality of severable attachment fingers
  • the latter are preferably provided on at least three edges of the base so as to reduce the risk of twisting and bending of the base relative to the lead frame.
  • a cover is fitted to the base and sealed thereto by means of a suitable adhesive.
  • an electromagnet and associated armature assembly may be secured to the base during assembly.
  • the invention also lies in the construction of an electrical device fabricated within a lead frame comprising a moulded base attached to the lead frame by severable elongate links, which incorporates a first set of elongate conductive members formed by severing and bending in a downward direction selected links for example for connecting and mounting the device on a printed circuit board, and a second set of elongate conductive members formed by severing other of the links, which are bent upwardly from the base to serve as structural elements of the device or supports for components forming, the device.
  • a miniature electromagnetically operated relay comprising a base having mounted thereon an electromagnet, an armature and at least one contact set operable from a closed to open position (or vice versa) by movement of the armature, at least the contact set is formed by or carried on upstanding conductive components whose spacing and position during manufacture are determined by a lead frame, within which the base is supported by severable attachment tabs, the upstanding components being formed during manufacture by cutting and ' -bending elongate links of the lead frame which have been embedded in part in the moulded base.
  • Conductive pins for attachment of the relay to a printed circuit board or the like preferably extend from the underside of the base and may also be formed by cutting and bending elongate links of the lead frame which have been partially embedded in the moulded base.
  • such an electrical component comprises a sub-assembly to be mounted on the base having at least one conductive pin which after final assembly is to protrude through a hole in the base so as to provide for electrical connection to the sub-assembly, the base being provided with an oversize aperture through which the pin can protrude having a diameter which decreases from the top of the base to the underside of the base and the sub-assembly is provided with a downwardly directed spigot having a similar decreasing diameter for insertion into the aperture in the base, the spigot itself surrounding the conductive pin which is a tight fit therein but can be pushed therethrough to protrude below the base to provide the electrical connection as aforesaid during assembly of the device.
  • the spigot provides for location of the sub-assembly relative to the base and avoids the need for the conductive pin to provide mechanical support between the sub-assembly.
  • An adhesive may be employed to secure the sub-assembly in the base by smearing or otherwise coating some or all of the surface of the spigot before it is inserted into the hole (or smearing the wall of the hole) before the spigot is inserted.
  • a particular advantage of this aspect of the present invention is that the conductive pins cannot be guaranteed straight and therefore hole clearances in the base through which they have to protrude would normally have to be large to accommodate manufacturing tolerances etc.
  • By mounting the pins themselves in a sub-assembly which itself is locatable by way of a tapering fit between a spigot and a tapering hole so problems associated with location and manufacturing tolerances can be obviated and a reliable sealed joint can be provided through which the conductive pin can protrude.
  • the device is a relay which itself is to be sealed within a casing. In such a device, it is important that the conductive pins for example associated with the relay coil can penetrate through the base but nevertheless must be sealed to the base so as to prevent the seal being broken, and the present invention allows this.
  • the invention is thus particularly applicable to a coil bobbin sub-assembly forming part of a electromagnetic relay which is moulded on a moulded base wherein the coil bobbin includes tapering spigots protruding from its underside through which conductive pins can pass for providing electrical connection to the relay coil and wherein the spigots can be sealed into their cooperating holes in the base by means of an appropriate adhesive to provide a good seal.
  • Figure 1 is a plan view of one section of a sheet metal lead frame, after a stamping operation to remove metal from the lead frame sheet.
  • Figure 2 shows the same lead frame section after a plastics base has been moulded into position.
  • Figure 3 illustrates how a second lead frame can overlie the first to allow the superposition of components and permit components in one lead frame to be secured to components in the other before separation from their host frame.
  • Figure 4 is a perspective view of a primary lead frame with a moulded base in position and certain of the conductive fingers bent up to form structural elements of the final device in accordance with the invention
  • Figure 5 is a perspective view of an armature/actuator sub-assembly forming part of the device of Figure 4,
  • Figure 6 is a perspective view of a coil bobbin suitable for attachment to the base of Figure 4 between the various upstanding components thereon,
  • Figure 7 is a perspective view of a central core for use with the coil former of Figure 6,
  • Figure 8 is a perspective view of a U-shaped yoke which cooperates with the central core of Figure 7 to form an electromagnet core assembly
  • Figure 9 is a perspective view of the assembled coil * former, core and yoke with a coil shown wound on the former,
  • Figure 10 is a rear end view of the assembly of Figure 9,
  • Figure 11 is a perspective view of the base assembly shown in Figure 4 after separation from its lead frame, with the electromagnet assembly of Figure 9 mounted thereon, and illustrates how the overall assembly can be encompassed within a lid, and
  • Figure 12 is an internal view of the lid of Figure 11.
  • Figure 1 shows part of a lead frame 10 having pairs of indexing sprocket holes 12, 14 and 16, 18 at regular intervals along its length.
  • the lead frame is formed from thin sheet metal such as phosphor bronze, and typically can be coiled.
  • Intermediate sprocket holes 15 are shown which may be used for indexing but are not necessarily used for locating the lead frame at work stations.
  • the two pairs of sprocket holes 12 and 14 and 16 and 18 define a square on the lead frame having apertures formed therein as by stamping. Similar patterns of apertures are formed at regular intervals along the length of the lead frame between corresponding spaced apart pairs of sprocket holes.
  • the two large substantially rectangular apertures 20, 22 of the next pattern of _ -.. - apertures along the length of the lead frame can just be seen at the bottom of Figure 1 as denoted by 20' and 22' .
  • Extending into the apertures 20, 22 is a transverse strip 208, which is again repeated at 208" between the apertures 20' and 22' .
  • Electrical contacts of appropriate metal, typically of a precious metal are formed at 24 and 26 as by riveting or brazing- and on the underside at 28 and 30 in a similar way.
  • the material which has not been cut away in the lead frame of Figure 1- comprises conductive links which are to form pins on the one hand, adapted for securing to a printed circuit board or the like, and on the other hand, structural elements or supports for the final device.
  • Such devices require an insulated base and this is most conveniently formed by plastics injection moulding in the central region of the lead frame to form a substantially rectangular plastics base 32 as shown in Figure 2, in which the same reference numerals have been used to denote corresponding parts as in Figure 1.
  • the plastics material of base 32 is also shaped around the ends of the strip 208 to form end pieces 210, 212.
  • Pole pieces 202, 204 (to be described with reference to Figure 5) are now attached to the strip 208 as by welding or soldering, the pole pieces being correctly aligned by means of a jig (not shown).
  • a permanent magnet 206 (see Figure 5), as yet unmagnetised, may also be welded or soldered to the strip 208 at this time to form an armature/actuator sub-assembly 102.
  • This sub-assembly is then severed and removed from the lead frame by a die tool which cuts- or crops along the lines 101 and 103.
  • the waste portion adjacent the crop line 103 may at the same time also be severed along a line 105.
  • this separate sub-assembly can be made from the same lead frame 10, and without the complication and expense of fabricating the sub-assembly on a separate production machine. Also the pole pieces and magnet can be accurately positioned for attachment to the strip 208.
  • FIG. 3 Whilst still in the flat, additional components can be secured to the conductive links of the lead frame as shown in Figure 3.
  • a second lead frame 34 is laid over the first lead frame 10 at right angles to the general direction of the latter so that elongate spring arms 36 and 38 in the second lead frame are correctly positioned relative to appropriate links in the first lead frame to allow the components to be joined as by riveting, brazing or welding at 40 and 42 respectively.
  • the arms 36 and 38 can be severed from the remainder of the lead frame 34 by means of cuts at 44, 46, 48 and 50 whereafter the second lead frame 34 can be lifted and indexed relative to the lower lead frame 10. The latter may then also be indexed away from the work station.
  • Circular holes in the second lead frame 34 are aligned with the sprocket holes 12, 14 and 16, 18 of the first lead frame to enable locating pins 52, 54, 56 and 58 to protrude therethrough and accurately align the two lead frames at the work stations.
  • the spring arms 36 and 38 also include rectangular lugs 55 and 57 (see Figure 4) which are formed by stamping and severing cuts along .the * lines.44 land 50 shown in- igure 3.
  • the moulded base 32 includes two tapered circular apertures 60 and 62, the purpose of which will be described later.
  • the moulded base includes recesses and slots as at 72 and 74 ( Figure 4) to facilitate the bending of the severed links such as 68 and 64 to their final positions.
  • the sub-assembly shown in Figure 4 actually comprises the spring contact assembly of a miniature relay.
  • the arms 36 and 38 are the springs on which the moving contacts are carried whilst the bent up severed links 68 and 70 provide the supports for the fixed ends of the springs.
  • the bent up severed links 88, 90, 92 and 94 comprise the fixed contact supports which cooperate with the two springs 36 and 38 to form two change-over contact sets.
  • Figure 11 is a perspective view of the base sub-assembly of Figure 4 (after separation from the lead frame) having the actuator sub-assembly mounted therein.
  • the latter comprises a U- shaped yoke 100 and the armature/actuator sub-assembly 102 the construction of which is further described below.
  • the armature/actuator sub-assembly carries the actuator strip 208 and end pieces 210, 212 which act on the two elongate spring arms 36 and 38 and by biasing the armature in one direction opposite to the direction in which it will move when the coil 104 is energised, so the contact sets can be made to change over in response to energisation of the coil.
  • the armature essentially comprises three parts, the pair of magnetiseable cheeks or pole pieces 202, 204 held separated by the strip 208, the very powerful permanent magnet 206 between the two cheeks and actuator strip, and end pieces 210, 212 for determining the initial and actuated position of the two spring sets, as previously referred to.
  • the two side cheeks or pole pieces 202, 204 are formed from the flat and are made of soft iron, such as Swedish iron.
  • actuator strip 208 and the end pieces 210 and 212 are shown chain-dotted in Figures 3 and 4. In fact at this stage they are no longer in those positions, as previously referred to.
  • the electromagnet is formed from a number of different constituent parts one of which is shown in Figure 6.
  • This comprises a bobbin 156 having end cheeks 158 and 160 the latter including legs 162 and 164 having tapering spigots 166 and 168 on their undersides respectively.
  • Conductive pins 170 and 172 protrude through and are embedded in the legs 162, 164.
  • the lower protruding ends of the pins comprise further conductive devices for attaching the component to a printed circuit board or the like, and the upper protruding ends provide terminations for the coil 104, which is wound on the bobbin 156 in a manner known per se and may comprise a single or double wound coil. If the latter, then additional leads and terminations are required.
  • a magnetiseable core 174 shown in Figure 7, is fitted through the rectangular section hollow interior 176 of the bobbin 156 with a central pole 178 at the end remote from the end having the legs.,.162 and 164.
  • the U-shaped yoke 100 is fitted around the bobbin after the coil 104 has been wound thereon and is shown in Figure 8.
  • the two pole pieces which are to cooperate with the central pole 178 are shown at 180 and 182 respectively.
  • Figure 9 shows the assembly of the coil and yoke and illustrates how the coil wire can be terminated on the conductive pins, one of which is shown at 172.
  • FIG 10. A rear view of the electromagnetic assembly of Figure 9 is shown in Figure 10. This clearly shows the two spigots 166 and 168 which are designed to fit into the tapering holes 60 and 62 previously referred to with reference to Figure 3.
  • the location of the spigots in the holes 60 and 62 is sufficiently accurate to position the bobbin and electromagnetic assembly relative to the fixed contacts formed by bending up the severed links 88, 90 etc. as shown in Figure 4.
  • the spigots 166 and 168 are adhesively secured within the holes 60 and 62.
  • the conductive pins 170 and 172 to which opposite ends of the winding are attached, are themselves a tight fit in the base of the sub-assembly shown in Figure 10 and can be pushed through holes which extend through the base and the spigots 166 and 168 so as to protrude beyond and below the base of the device after assembly.
  • FIG. 11 The assembly of Figure 11 is protected by means of a lid or cover of generally rectangular proportions, denoted by reference numeral 184, the interior of which is generally rectangular but includes pairs of moulded bosses 186 at the upper corners and towards the centre thereof (see Figure 12) . These extend to a depth within the cover 184 such that the latter is caused to just fit snugly on the base 10 with the lower ends of the bases 186 contacting the upper edges of the U-shaped yoke 100 ( Figure 11).
  • the height of the cover 184 is thus controlled so that when fitted the cover prevents the U- ⁇ shaped yoke 100 from lifting off the base and the armature actuator from lifting relative to the spring arms 36 and 38.
  • Figure 11 also shows how the unwanted support links can be folded up after severing so as to be wholly contained within the cover 184 when the latter has been fitted. In this way they do not constitute unwanted conductive protrusions on the underside or along the edge of the base.
  • Two of the folded up links are denoted by reference numerals 186 and 188 in Figure 11.
  • the conductive pins such as 190, 192 and 194 provide electrical connection to the moving contacts and fixed contacts of the nearest contact set shown in Figure 11, whilst a similar set of conductive pins on the other side of the base, (of which one can be seen at 196) provide similar contacts to the other contact set on the other side of the assembly.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Inorganic Insulating Materials (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Manufacture Of Switches (AREA)

Abstract

Un composant électrique, en particulier un relais miniature possédant des contacts fixes et mobiles, est constitué d'un cadre en plomb (10) sur lequel sont formés une pluralité de doigts conducteurs et est moulée une base isolante (32). Certains des doigts (64, 66) sont recourbés vers le bas en vue de la connexion avec une carte de circuits imprimés, tandis que d'autres (68, 70; 88 à 94) sont recourbés vers le haut afin de constituer des supports pour les contacts (24, 26) ou une autre structure. Un second cadre en plomb (34) peut être posé de manière orthogonale sur le premier cadre afin de permettre la fixation de bras ressort (36, 38) aux doigts (68, 70) avant leur recourbement vers le haut.
PCT/GB1988/000445 1987-06-16 1988-06-08 Perfectionnements apportes a des composants electriques WO1988010505A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB878714058A GB8714058D0 (en) 1987-06-16 1987-06-16 Step of ladder
GB8714058 1987-06-16
GB8716287 1987-07-10
GB878716287A GB8716287D0 (en) 1987-07-10 1987-07-10 Sealing of electrical components
GB888809714A GB8809714D0 (en) 1987-06-16 1988-04-25 Improvements in & relating to electrical components
GB8809714 1988-04-25

Publications (1)

Publication Number Publication Date
WO1988010505A1 true WO1988010505A1 (fr) 1988-12-29

Family

ID=27263460

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1988/000445 WO1988010505A1 (fr) 1987-06-16 1988-06-08 Perfectionnements apportes a des composants electriques

Country Status (4)

Country Link
EP (1) EP0363410A1 (fr)
JP (1) JPH02503844A (fr)
AU (1) AU1943988A (fr)
WO (1) WO1988010505A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005989A1 (fr) * 1988-11-24 1990-05-31 P E D Limited Armature/actuateur pour relais
FR2687835A1 (fr) * 1992-02-21 1993-08-27 Dav Circuit primaire predecoupe constituant support de mecanisme.
US5880653A (en) * 1993-09-17 1999-03-09 Omron Corporation Electromagnetic relay and its manufacture
EP1463080A1 (fr) * 2003-03-26 2004-09-29 Tyco Electronics AMP GmbH Procédé de fabrication d'un relais électromagnétique et un relais électromagnétique
EP2251886A1 (fr) * 2009-05-14 2010-11-17 Good Sky Electric Co., Ltd. Relais électromagnétique et son procédé d'assemblage
CN112369134A (zh) * 2018-07-06 2021-02-12 株式会社富士 元件供给装置
CN116884807A (zh) * 2023-08-17 2023-10-13 滁州市科信电子有限公司 一种磁保持继电器元件brd位整形设备及生产线

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FR2213569A1 (fr) * 1972-11-13 1974-08-02 Amp Inc
EP0058727A1 (fr) * 1980-09-01 1982-09-01 Fujitsu Limited Relais electromagnetique et son procede de fabrication
DE3542953A1 (de) * 1984-12-25 1986-04-24 Alps Electric Co Ltd Verfahren zur herstellung von mikroplaettchen fuer einen elektrischen schalter
US4656733A (en) * 1985-09-03 1987-04-14 Omron Tateisi Electronics Co. Method of manufacture of base assembly for an electromagnetic relay

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2213569A1 (fr) * 1972-11-13 1974-08-02 Amp Inc
EP0058727A1 (fr) * 1980-09-01 1982-09-01 Fujitsu Limited Relais electromagnetique et son procede de fabrication
DE3542953A1 (de) * 1984-12-25 1986-04-24 Alps Electric Co Ltd Verfahren zur herstellung von mikroplaettchen fuer einen elektrischen schalter
US4656733A (en) * 1985-09-03 1987-04-14 Omron Tateisi Electronics Co. Method of manufacture of base assembly for an electromagnetic relay

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005989A1 (fr) * 1988-11-24 1990-05-31 P E D Limited Armature/actuateur pour relais
FR2687835A1 (fr) * 1992-02-21 1993-08-27 Dav Circuit primaire predecoupe constituant support de mecanisme.
US5880653A (en) * 1993-09-17 1999-03-09 Omron Corporation Electromagnetic relay and its manufacture
EP1463080A1 (fr) * 2003-03-26 2004-09-29 Tyco Electronics AMP GmbH Procédé de fabrication d'un relais électromagnétique et un relais électromagnétique
EP2251886A1 (fr) * 2009-05-14 2010-11-17 Good Sky Electric Co., Ltd. Relais électromagnétique et son procédé d'assemblage
CN112369134A (zh) * 2018-07-06 2021-02-12 株式会社富士 元件供给装置
CN112369134B (zh) * 2018-07-06 2022-09-09 株式会社富士 元件供给装置
CN116884807A (zh) * 2023-08-17 2023-10-13 滁州市科信电子有限公司 一种磁保持继电器元件brd位整形设备及生产线
CN116884807B (zh) * 2023-08-17 2024-01-02 滁州市科信电子有限公司 一种磁保持继电器元件brd位整形设备

Also Published As

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EP0363410A1 (fr) 1990-04-18
AU1943988A (en) 1989-01-19
JPH02503844A (ja) 1990-11-08

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