DE8908257U1 - Electromagnetic relay - Google Patents

Description

R.22709
14.6.1989 Ws/Hm

BQBSST BOSCH SiBH, 7000 STOTTGAET 10

Electromagnetic EaXaIs
State of the art

The invention relates to an electromagnetic relay according to the preamble of claim 1.

For example, in such a known hinged armature relay (DE-OS 34 23 271), electronic components for wiring the relay are inserted into a corresponding recess in the base plate and connected to

■>· the connection parts anchored in the base plate of the relay by

% Spot welding is used. The relay winding is connected

L there via wire-shaped connecting parts which are attached to the upper flange

end of the coil body are embedded in a form-fitting manner. One angled end of these connecting parts is connected to a

The connector part anchored in the base plate is contacted by spot welding, and the other angled end is connected to one end of the

Relay winding wrapped and soldered.

For relays/ whose relay windings are protected against polarity reversal and \ Overvoltage connected to corresponding electrical components

The aim of this solution is to reduce the amount of parts and operations required for production from

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To keep costs as low as possible and to design it so that the product can be manufactured in an automated production process.

Advantages of the invention

The inventive design of the Seiais kit with the characterizing features of claim 1 has the advantage that with the arrangement of a polarity reversal protection diode in the coil body of the relay winding, the wire-shaped connecting part previously required there is no longer required. This results in a further advantage in the reduction of work steps, since such a diode no longer has to be additionally inserted into the relay and contacted.

The measures listed in the subclaims result in advantageous improvements and improvements to the features specified in claim 1. It is particularly advantageous if the diode is clamped into a correspondingly shaped recess in the coil body before its connection wires are made. The connection wires of the diode are expediently fixed between molded clamping ribs on the coil body. In order to keep the area for installing and contacting the diode easily accessible, the diode is advantageously arranged on the upper flange end of the coil body, which faces away from the hinged armature.

drawing

An embodiment of the invention is shown in the drawing and explained in more detail in the following description. Figure 1 shows an enlarged longitudinal section of a folding armature relay according to the invention, Figure 2 shows the electrical circuit of the relay and Figure 3 shows part of the relay from Figure 1 in plan view with a diode inserted in the coil body.

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Description of the embodiment

In Figure 1, a folding armature relay for motor vehicles, shown enlarged in longitudinal section and operating as a changeover relay, is designated 10. It consists of a base assembly 11 and a magnet system 12 as pre-assembled units. The base assembly 11 consists of a base plate 13 made of insulating material with connecting parts in the form of flat plug-in tabs 14 anchored therein and projecting from the underside of the base plate 13. Above the base plate 13, the flat plug-in tabs 14 are partly provided with connecting tabs 14a, which serve to contact the flat plug-in tabs 14 with the relay contacts and folding connections discussed later. The magnet system 12 consists of an L-shaped magnet yoke 15 with a coil core 16 riveted to its short leg. A coil body 17 made of insulating material is placed on the coil core 16 and is attached to the free end of the coil core 16 by means of a wobble rivet. On the coil body 17 there is a relay winding 18, the rear, not visible winding end of which is contacted with a wire-shaped connecting part inserted into the coil body 17 and the front winding end of which is wound and soldered around a connecting wire 19a of a reverse polarity protection diode 19. The magnet yoke 15 has a bearing point 20 at the end of the long leg. The bearing point consists of a front recess on the magnet yoke 15 into which one end of a hinged armature 21 is inserted. The hinged armature 21, which is pivotably mounted on the bearing point 20, is held by an armature return spring 22, which is suspended between the end 21a of the hinged armature 21 projecting beyond the bearing point 20 and a projection 15a of the magnetic yoke 15. The armature return spring 22 is pushed towards the magnetic yoke 15 by a spring clip 23 made of plastic which is clipped onto the magnetic yoke 15.

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bent to secure the hinged armature 21 against axial displacement. The hinged armature 21 carries a leaf spring 24, one of which

End in the area of bearing point 20 by riveting on the hinged anchor

&igr; 21 is attached. A switching contact 25 is riveted to the other, free end of the leaf spring 24, which interacts with a working contact 26 and a resting contact 27. When the relay is switched off, the hinged armature 21 has fallen off the coil core 16 by being swung downwards by the force of the return spring 22, and thus the switching contact 25 is in contact with the resting contact 27 with the required contact pressure. When the hinged armature 21 is pulled in according to Figure 1, the switching contact 25 is in contact with the working contact 26, with the leaf spring 24 being bent slightly downwards from the hinged armature 21 for the required contact pressure. The working contact 26 is firmly connected to the middle flat plug tongue 14 in a manner that cannot be seen via metal webs guided on both sides of the resting contact 27. The left flat plug-in tongue 14 is connected to the leaf spring 24 of the hinged armature 21 via a short connecting wire 28.

The cow contact 27 is located at the upper end of the icCiittrü, Uiü -

90° rotated flat plug tongue 14. Parallel to this flat plug tongue

14 there are two more, not visible flat plugs, from /

one in front of and the other behind the flat surface shown £

Plug-in tongue 14 is anchored in the base plate 13. Piese flat plug-in '■% Tongues are each provided with a connecting lug above the base plate \

14a, which protrude from both sides of the working contact 26.

the end of the front connecting lug 14a 1 visible in Figure 1 protrudes

to below the end of the connecting wire 19b of the reverse polarity protection diode 19. ^v

This connecting wire 19b of the diode 19 is connected by a welding point

29 with the terminal lug 14a and consequently with the corresponding, '

not visible flat plug tongue. The rear, not \

recognizable connection lug is there with the end of a connection j

wire welded to the other winding end of the relay -;

winding 18. \

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p As Figure 2 in conjunction with Figure 3 shows, the polarity reversal

protection diode 19 is inserted into the positive connection of the relay winding 18. As overvoltage protection, a resistor 30 is also inserted between the two connections of the relay winding 18, which is inserted in a recess 31 of the base plate 13 according to Figure 1. In Figure 3 it can be seen that the polarity reversal protection diode 19 with the adjacent areas of its connecting wires 19a and 19b is clamped into a correspondingly shaped recess 32, which is located at the upper flange end of the coil body 17, which faces away from the hinged armature 21. During assembly, the diode 19 is first fixed with stretched connecting wires 19a and 19b between molded clamping ribs 33 of the coil body 17, which are angled downwards after being aligned with the winding end 18a of the relay winding 18.

Claims (4)

R. 22709 14.6.1989 Ws/Hm ROBERT BOSCH GMBH, 7000 STUTTGART 10 Claims 1. Electromagnetic relay with connection parts accommodated in a base plate made of insulating material and protruding from the underside, a magnetic yoke fastened to the base plate with a coil core, a coil body carried by the coil core with a relay winding, a hinged armature arranged in front of the end of the coil core and pivotably mounted on the magnetic yoke with a switching contact and at least one ^contact connected to the switching contact . Connecting parts attached to the coil body are each firmly connected to one of the connecting parts, characterized in that at least one of the connecting parts (19) consists of a diode, the connecting wires (19a, 19b) of which are firmly contacted on the one hand with a winding end (18a) and on the other hand with one of the connecting parts (14) attached to the base plate (13). 2. Relay according to claim 1, characterized in that the diode (19) is clamped with the adjacent areas of its connecting wires (19a, 19b) into a correspondingly shaped recess (32) of the coil body (17). -Z- E.22709 3. Relay according to claim 2, characterized in that the connecting wires (19a, 19b) of the diode (19) are fixed between molded clamping elements (33) of the coil body (17). 4. Relay according to one of the preceding claims/characterized in that the diode (19) is arranged on the flange end (17a) of the coil body (17) facing away from the hinged armature (21).