WO2000060625A1 - Elektromagnetisches relais - Google Patents
Elektromagnetisches relais Download PDFInfo
- Publication number
- WO2000060625A1 WO2000060625A1 PCT/IB2000/000424 IB0000424W WO0060625A1 WO 2000060625 A1 WO2000060625 A1 WO 2000060625A1 IB 0000424 W IB0000424 W IB 0000424W WO 0060625 A1 WO0060625 A1 WO 0060625A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- armature
- contact spring
- relay according
- contact
- spring
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
- H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/60—Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
Definitions
- the invention relates to an electromagnetic relay that can be used universally.
- a contact spring for a relay generally has to fulfill two tasks. On the one hand, it carries a switch contact, which is pressed against a fixed contact by the spring force of the contact spring, on the other hand, the current flows through it to the switch contact. While mechanical resilience is important in the first case, the second task requires high electrical conductivity. Materials that are high
- a simpler way to reduce the transit resistance of a relay is to perform either very wide, the spring, or to use a material which has a good 'conductivity.
- the latter variant assumes, however, that the mechanical load on the spring is relatively low.
- the spring can be designed in an arc shape in order to evenly distribute the bending stress that occurs.
- the aim of the present invention is to provide an electromagnetic relay, the volume resistance of which is low, without the need to use additional parts or the structure becoming more voluminous.
- this goal is achieved by a relay with the following features.
- a base body a coil, a core arrangement, an armature which is arranged with an armature end at an end portion of the core arrangement so as to be pivotable about an armature axis of rotation and the other end of which forms a free armature end, at least one fixed contact, a contact spring which is connected to a fastening end an immovable section of the relay is fastened, with a movable contact spring end, which is coupled to the free armature end, and at least one switching contact, which cooperates with at least one of the fixed contacts, the contact spring overall having approximately an arc shape and being designed as a moment spring, and wherein the Switch contact is arranged on a central portion of the contact spring.
- the relay according to the invention is advantageous because the mechanical load on the contact spring is very low and uniform. This is achieved above all in that the contact spring is designed as a moment spring.
- a moment spring can be defined in that both spring ends are attached to third parts in such a way that there is no rotation of the spring end relative to the respective third part around the attachment point.
- the property of the contact spring is that the spring deforms when it moves so that the change in curvature is almost constant. Because of this, the bending loads on the contact spring are largely constant along the spring. The mechanical loads on the spring are also low because of the length of the
- the low load in the area of the contact spring ends is advantageously ensured in that the fastening plane of the movable contact spring end is tangential to the direction of movement of the free armature end, because the spring is only slightly bent at the fastening point.
- the fastening plane of the fastening end lies essentially perpendicular to a shortest connecting line from a fastening edge, at which the movable part of the contact spring begins, to the armature axis.
- the volume resistance is further reduced if the switch contact is arranged in a central region of the contact spring, since this shortens the current path from a connecting conductor to the switch contact.
- This arrangement also has the advantage that a path transformation from the free armature end to the switch contact occurs and the contact tearing forces of the switch contact increase in comparison to an arrangement near the armature end or beyond.
- a weaker design of the magnet system is possible, which is conducive to a compact structure.
- an even softer material can be used for the contact spring because the required restoring force is lower.
- the contact spring describes the shape of an ellipse section, because in this embodiment the load is distributed particularly evenly over the length of the contact spring.
- a further advantage is obtained when the armature axis of rotation lies approximately in the middle of the area described by the contact spring, because the free armature end is guided on a circular path that stresses the contact spring particularly gently, because the contact spring has a homogeneous load distribution. The following applies to an almost arched spring: If the shape of the spring were approximated to an arch, the axis of rotation would be where the arch would have its center.
- An additional advantage of the invention results from the fact that the contact spring can at the same time pretension the armature into a rest position, because smoit does not need an armature return spring.
- the production of the contact spring for a relay according to the invention is particularly simple if the contact spring has a constant width over the entire length and, for example, holes for relieving the contact spring can be omitted at certain points.
- the contact spring preferably consists of an electrically highly conductive material, the mechanical properties of which are sufficient due to the uniformly low mechanical load.
- FIG. 1 shows a relay according to the invention, in which the contact spring also acts as a return spring.
- Figure 2 is a partial view with the armature and the contact system of the relay of Figure 1, and
- Figure 3 shows another embodiment of a relay according to the invention.
- a coil 1 is seated on a first leg of a core arrangement 3, so that an armature bearing section 4 of the first leg, which is otherwise not visible in the figures, is located outside the coil 1.
- a pole section 5 of a second leg 6 of the core arrangement 3 forms a core pole face 7, which interacts with an armature pole face 8 at a free end 9 of an armature 10.
- the armature 10 On the edge of the armature bearing section 4 facing away from the second leg 6, the armature 10 is pivotally mounted with an inner edge about a bearing edge 11 which forms the armature axis of rotation, so that in the open state a wedge-shaped armature bearing gap 12 is formed between the armature 10 and the armature bearing section 8 results that disappears in an anchor closing position.
- the inner edge results from the formation of two lugs 20 on the armature 10.
- the armature 10 is essentially L-shaped and arranged in such a way that the transverse leg of the L, which is the free armature end 9, points outwards.
- the anchor 10 differs from the L shape in that it is bent inwards in a central section 14.
- the free armature end 9 forms with its armature pole face 8 and the core pole face 7 a working air gap 15.
- the armature pole face 8 is in the area of its front end 8a in the closing direction essentially perpendicular to a connecting line to the bearing edge 11.
- the core pole face 7 extends at least approximately when the armature 10 is tightened parallel to the armature pole face 8. Because of the molded-on lugs 20, the armature 10 cannot be displaced by the magnetic force acting in the working air gap 15 in such a way that the working air gap 15 closes.
- a contact spring 16 has, inter alia, the task of pressing the inner edge of the armature 10 against the bearing edge 11 of the end section 4, so that the armature 10 is only able to rotate.
- the opening angle of the armature bearing gap 12 of such a magnet system is, for example, 10 ° large compared to one conventional hinged anchor system, the opening angle of which is usually not greater than 5 °.
- a fastening end 17 of the contact spring 16 is fastened to the armature bearing section 4 on the side on which the bearing edge 11 is also located, near a coil former flange 13, preferably by injection together with a connecting conductor (not shown). In the area of its fastening end 17, the contact spring 16 approaches tangentially to a plane that is parallel to the end face of the armature bearing section 4.
- this criterion is not met to the same extent, for example, if design considerations for rough use lead to a different position of the fastening edge.
- the movable part 21 of the contact spring 16 is bent around the armature bearing section 4 and a longitudinal leg 22 of the armature 10 and fastened to the free armature end 9.
- the movable end 23 of the contact spring 16 follows the free armature end 9 in its movement.
- the contact spring 16 lies in the area of its attachment to the armature 10 in a plane which is tangential to the direction of movement of the free armature end 9. With this arrangement, the contact spring 16 assumes approximately the shape of an ellipse, with approximately a quarter of the ellipse remaining open.
- the contact spring could also be attached to the armature by means of a movable coupling. To optimize the size of the relay, the contact spring 16 also be designed so that the shape differs greatly from an ellipse.
- the bearing edge 11 lies approximately in the middle of the ellipse, so that a "natural” load results for the contact spring 16 when the armature moves, which is distributed evenly over the entire length of the contact spring 16.
- the contact spring 16 has a central section 24 to which a switch contact 25 is attached. In the exemplary embodiment from FIGS. 1 and 2, this interacts with a fixed contact 26, the position of which is fixed on a base body 27.
- the switching contact 25 is located at approximately half the length of the contact spring, which results in a short current path to the connecting conductor (not shown) at the fastening end 17 of the contact spring 16.
- the tearing forces for opening the contacts 25 and 26 are particularly large because a force transmission takes place between the free armature end 9 and the switching contact 25.
- the distance between the contacts 25 and 26 in the opening position is nevertheless sufficient, since the opening angle of the armature bearing pair 12 can be chosen to be correspondingly large. Due to the advantageous design of the armature 10, there are nevertheless no disadvantages for the efficiency of the magnetic circuit.
- the armature pole face 8 When the coil 1 is excited, the armature pole face 8 is attracted to the core pole face 7, and the armature 10 moves into the closed position. In the closed position of the armature 10, the movable contact 25 forms a connection with the fixed contact 26.
- the contact spring 16 which also acts as a return spring in a particularly advantageous manner, moves the armature 10 in the direction of the open position, since the armature 10 is biased into the open position when the relay is at rest.
- an additional one is also conceivable Use return spring.
- An inventive design of the contact spring according to the embodiment of Figures 1 and 2 is also favorable because neither the spring width has to be varied nor even other measures, such as relief holes, necessary for uniform loading of the spring, as is normally the case. This simplifies production, which is also advantageous from a cost perspective.
- a relay according to the invention is shown in a specific embodiment.
- the relay does not have an additional armature return spring, but the armature return force, which biases the armature 35 into an open position, is applied by the contact spring 30.
- the relay it is also possible to equip the relay with an additional armature return spring; this can be arranged, for example, in the free area between the armature 35 and the contact spring 30.
- a movable contact 32 Arranged on the contact spring 30 in a central region is a movable contact 32 which cooperates with a first fixed contact 33 in the open position of the armature 35 and with a second fixed contact 34 in the closed armature position.
- the shape of the contact spring 30 differs from the shape of the contact spring 16 from the first exemplary embodiment and enables a space-saving construction by means of several bending edges of the contact spring 30.
- the contacts 32, 33 and 34 can also be used as double contacts be carried out. In this case, however, a longitudinal slot would have to be provided in the contact spring 30 between the two switching contacts in order to compensate for the inevitable tolerances in the height of the contacts.
- the contact system can also be connected as a bridge changer. In this case, the power supply to the switch contacts would have to be separate from the spring clamping.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50001047T DE50001047D1 (de) | 1999-04-07 | 2000-04-07 | Elektromagnetisches relais |
EP00914323A EP1166307B1 (de) | 1999-04-07 | 2000-04-07 | Elektromagnetisches relais |
US09/958,185 US6531939B1 (en) | 1999-04-07 | 2000-04-07 | Electromagnetic relay |
JP2000610030A JP2002541622A (ja) | 1999-04-07 | 2000-04-07 | 電磁リレー |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19915691.3 | 1999-04-07 | ||
DE19915691A DE19915691A1 (de) | 1999-04-07 | 1999-04-07 | Elektromagnetisches Relais |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000060625A1 true WO2000060625A1 (de) | 2000-10-12 |
Family
ID=7903786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2000/000424 WO2000060625A1 (de) | 1999-04-07 | 2000-04-07 | Elektromagnetisches relais |
Country Status (6)
Country | Link |
---|---|
US (1) | US6531939B1 (de) |
EP (1) | EP1166307B1 (de) |
JP (1) | JP2002541622A (de) |
DE (2) | DE19915691A1 (de) |
ES (1) | ES2189745T3 (de) |
WO (1) | WO2000060625A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3742405A (en) * | 1972-03-06 | 1973-06-26 | Trw Inc | Small high current dc relay structure |
CA978577A (en) * | 1975-06-18 | 1975-11-25 | Rodney Hayden | Obturator structure for silent automotive relay |
GB1554423A (en) * | 1975-06-18 | 1979-10-24 | Trw Inc | Switching devices |
DE3640737A1 (de) * | 1986-11-28 | 1988-06-09 | Bosch Gmbh Robert | Elektromagnetisches relais |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1022971A (en) * | 1975-06-18 | 1977-12-20 | Rodney Hayden | Electromechanical switching device |
US4064470A (en) * | 1975-06-20 | 1977-12-20 | Trw Inc. | Obturator structure for silent automotive relay |
US4564828A (en) * | 1984-05-14 | 1986-01-14 | American Zettler, Inc. | Electromagnetic relay |
DE3630371A1 (de) * | 1986-09-05 | 1988-03-10 | Siemens Ag | Elektromagnetisches kleinschaltrelais |
US5155458A (en) * | 1991-11-04 | 1992-10-13 | Gamble John G | Normally closed AC relay |
-
1999
- 1999-04-07 DE DE19915691A patent/DE19915691A1/de not_active Ceased
-
2000
- 2000-04-07 ES ES00914323T patent/ES2189745T3/es not_active Expired - Lifetime
- 2000-04-07 EP EP00914323A patent/EP1166307B1/de not_active Expired - Lifetime
- 2000-04-07 DE DE50001047T patent/DE50001047D1/de not_active Expired - Lifetime
- 2000-04-07 WO PCT/IB2000/000424 patent/WO2000060625A1/de active IP Right Grant
- 2000-04-07 US US09/958,185 patent/US6531939B1/en not_active Expired - Fee Related
- 2000-04-07 JP JP2000610030A patent/JP2002541622A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3742405A (en) * | 1972-03-06 | 1973-06-26 | Trw Inc | Small high current dc relay structure |
CA978577A (en) * | 1975-06-18 | 1975-11-25 | Rodney Hayden | Obturator structure for silent automotive relay |
GB1554423A (en) * | 1975-06-18 | 1979-10-24 | Trw Inc | Switching devices |
DE3640737A1 (de) * | 1986-11-28 | 1988-06-09 | Bosch Gmbh Robert | Elektromagnetisches relais |
Also Published As
Publication number | Publication date |
---|---|
JP2002541622A (ja) | 2002-12-03 |
EP1166307B1 (de) | 2003-01-08 |
EP1166307A1 (de) | 2002-01-02 |
DE19915691A1 (de) | 2001-08-09 |
DE50001047D1 (de) | 2003-02-13 |
US6531939B1 (en) | 2003-03-11 |
ES2189745T3 (es) | 2003-07-16 |
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