Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/18—Movable parts of magnetic circuits, e.g. armature
  • H01H50/24—Parts rotatable or rockable outside coil
  • H01H50/28—Parts movable due to bending of a blade spring or reed

Definitions

• the invention relates to an electromagnetic relay with a folding armature according to the preamble of the main claim.
• the aim is to press the hinged anchor in a defined bearing point on the magnetic yoke with sufficient force by the leaf spring, so that a friction-free and impact-resistant storage is ensured.
• the relay according to the invention with the characteristic features of the main claim has the advantage that due to the force components of the hairpin-shaped leaf spring bent around the bearing point, which act on the bearing point in the direction of the two fastening points of the leaf spring on the hinged armature and on the magnetic yoke, a bearing friction by axial displacement of the hinged armature on the one hand and a lifting of the hinged armature from the magnetic yoke in the event of impact and vibrations on the other hand is prevented.
• Another advantage is that when the leaf spring is manufactured and when the hinged armature is installed in the relay, the force components can be dimensioned so that adjustment tolerances have no influence on the functional reliability of the bearing point.
• the legs of the leaf spring expediently each have two holes into which rivet pins of the hinged armature or the magnetic yoke protrude. Relief of the leaf spring at the rivet points can be avoided by bending the leg ends of the hairpin-shaped curl of the leaf spring in front of the rivet points towards the level of the magnetic yoke or the hinged armature.
• a particularly uniform and therefore gentle and reliable storage between the hinged anchor and the magnetic yoke is achieved in that the hairpin-shaped curl presses the hinged anchor onto its bearing point on the magnetic yoke by fastening the leaf spring to the magnetic yoke and to the hinged anchor in such a way that force components of approximately the same size are directed towards the fastening points act on the magnetic yoke and on the hinged anchor.
• FIG. 1 shows an enlarged folding armature relay in longitudinal section
• FIG. 2 shows the same relay in side view
• FIG. 3 shows a greatly enlarged detail of the relay with the folding armature and the magnetic yoke in the storage area.
• an enlarged folding armature relay for motor vehicles which operates as a changeover relay, is designated by 10. It consists of a floor assembly and a magnet system, both of which are manufactured separately as pre-assembled units and finally assembled.
• the floor assembly 11 consists of a base plate 13 made of insulating material with anchored therein, protruding on the underside of the base plate 13 connecting parts in the form of flat tabs 14. Above the base plate, the flat tabs 14 are provided with elbows 14a, 14b for attaching relay contacts or winding connections discussed later.
• the magnet system 12 consists of an L-shaped magnet yoke 15 with a coil core 16 which is pressed and riveted into its short leg.
• a coil frame 17 made of insulating material is placed on the coil core 16 and is formed by a cord on the shaft of the coil core 16 with the latter is frictionally connected.
• the connecting wires are also not recognizable, each having contact with one of the connecting lugs of a tab 14.
• the coil frame 17 is secured against rotation by a shoulder 19 which is guided around the outside of the magnetic yoke 15.
• the magnetic yoke 15 has at the end of the long leg a bearing 20 for a hinged armature 21 which is inserted in the region of the bearing 20 in a recess 22 of the magnetic yoke 15 and is held by a leaf spring 23.
• the leaf spring 23 is both an armature return spring and a contact carrier for a switching contact 24 at the front end of the leaf spring 23.
• the switching contact 24 interacts with a normally open contact 21 with a normally open contact 25 and with a normally closed contact 26 with a broken relay.
• the relay 10 is shown in the switched-on state.
• the switch contact 24 is here with the required contact pressure on the normally open contact 25.
• FIG 3 shows the hinged armature 21 of the relay with the bearing 20 on the magnetic yoke 15 in the dropped position, i.e. when the relay is switched off.
• the bearing point 20 is designed as a cutting edge bearing, in that on the magnetic yoke 15 on the upper side of the recess 22 a bearing edge 27 extending in the plane of the folding armature 21 engages in a bending edge serving as a bearing socket, around which two bearing flaps 28 spaced apart at the bearing end 21a of the folding armature 21 are bent towards the magnetic yoke 15 with sharp edges.
• the leaf spring 23 is curled in a hairpin-shaped manner around the bearing point 20, the legs 29a and 29b of the hairpin-shaped curl 29 being spread apart at an acute angle.
• One leg 29b is fastened at its end to the magnetic yoke 15.
• the other leg attached to the hinged armature 21 presses the switching contact 24 of the hinged armature 21 with the desired contact pressure F1 in the rest position of the hinged armature 21 against the normally closed contact 26.
• the original shape of the leaf spring 23 in the area of the curl 29 is shown in dashed lines in FIG.
• the leaf spring 23 is fastened to the magnetic yoke 15 with the end of the leg 29b and is thereby pretensioned in such a way that the hinged armature 21 on its bearing point 20 with a force component F2 and F3 directed towards the fastening points of the leaf spring 23 on the magnetic yoke 15 is present.
• the leg 29a of the leaf spring 23 is connected to the hinged anchor 21 by two riveting points 31 located next to one another.
• the rivet point 30 on the magnetic yoke 15 is also formed with one or two extruded rivet pins lying side by side.
• two rivets 30 of the leaf spring leg 29b lying next to each other on the magnetic yoke 15 can be seen.
• FIG. 1 it can be seen that at the rivet points 30, 31 the leg ends 29a, 29b of the hairpin-shaped curl 29 are each provided with holes into which rivet pins of the hinged armature 21 or the magnetic yoke 15 protrude. In each case in front of the rivet points 30 and 31, the leg ends 29a, 29b of the hairpin-shaped curl 29 are bent toward the level of the magnetic yoke 15 or the hinged armature 21.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Electromagnets (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6315029

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (9)

Citations (7)

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• 1986
  • 1986-11-28 DE DE19863640737 patent/DE3640737A1/de active Granted
• 1987
  • 1987-08-25 US US07/236,355 patent/US4951017A/en not_active Expired - Lifetime
  • 1987-08-25 AU AU78541/87A patent/AU7854187A/en not_active Abandoned
  • 1987-08-25 WO PCT/DE1987/000377 patent/WO1988004101A1/de not_active Ceased
  • 1987-11-27 ES ES8703398A patent/ES2008922A6/es not_active Expired

Patent Citations (7)

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