EP0650636A1 - Elektrischer schnappschalter - Google Patents
Elektrischer schnappschalterInfo
- Publication number
- EP0650636A1 EP0650636A1 EP94913489A EP94913489A EP0650636A1 EP 0650636 A1 EP0650636 A1 EP 0650636A1 EP 94913489 A EP94913489 A EP 94913489A EP 94913489 A EP94913489 A EP 94913489A EP 0650636 A1 EP0650636 A1 EP 0650636A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- snap
- switching element
- action
- switch according
- contact
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
Definitions
- the present invention is based on an electrical snap switch according to the preamble of the main claim.
- Snap spring switching mechanisms are known in a wide variety of embodiments. The common goal is to make the actual switching speed, the switching force and the switching path independent of the actuation of the switch.
- a snap spring with a spring tongue supported in a support bearing is actuated by plungers, which act on the two outer legs of the snap spring. The current flows from the mounting at the clamped end over the outer legs of the spring and from the spring tongue mounting via the spring tongue to the contact points.
- DE 3438304 A1 shows a double snap spring of the aforementioned type, the spring being mounted in the middle between the switching function areas.
- Flat switching plungers actuate the individual snap springs on the outer legs of the spring.
- DE 38 01 991 C2 shows a toggle switch with two integrated snap-action switching elements which are actuated as a function of the position of the toggle lever.
- Corresponding tappets each act on the two outer legs of the snap-action switching elements, the spring tongues of which are clamped in support bearings under pretension. The current flows from the mounting at the clamped end via the outer legs and from the spring tongue mounting via the spring tongue to the contact head. In order to ensure adequate contacting, only one point of the spherical contact head has to come into contact with the mating contact.
- DE 4003241 C2 shows a pressure switch with an integrated snap spring.
- a pressure switch is known from EP 0 074 004 A2, in whose housing two fixed contact points are arranged, which are connected by a contact bridge.
- An actuator acts on the contact bridge via a bow spring.
- the return stroke takes place by means of an additional compression spring, without which a return stroke could not take place.
- the switch exhibits a switching behavior that is dependent on the actuation.
- the contact bridge and the bow spring are not in direct operative connection, so that the switching behavior is influenced by several tolerances and is only defined in this context.
- the object of the invention is to create a switch with snap spring effect which contains separate solutions for the mechanical function "switching” and the electrical function “bridging contacts", the design and choice of materials resulting in an extremely favorable overall result in terms of functionality, low variety of parts and high ease of assembly is to be achieved.
- the object is achieved in that the snap-action switching element is made in one piece from a round wire, and in that the contact element is gimbaled within the snap-action element.
- the leaf spring known from the prior art is replaced by a round wire spring bent from spring steel.
- the current during switching is not carried out over certain areas of the spring, but rather by bridging two contact points by means of a contact bridge mounted in the round wire spring.
- the contact bridge is kept slightly gimbal in the wire spring, which guarantees reliable contacting.
- oval, elongated contact bridges can also be used, if a larger contact distance between the contact points requires this.
- the mounting base of conductor material required for a leaf spring is omitted, the wire spring is supported by a base which is part of an insulating housing which is present anyway and which at the same time has the points to be contacted for the purpose of switching, for. B. in the form of conductor tracks.
- the conductor tracks can consist of round or flat wires or of printed conductor tracks with contact rivets.
- the snap switching element is actuated via plungers which act on the outer legs of the spring. It is thus possible to implement all common switching principles such as push, rocker, slide, pull, turn and tilt actuation with the help of common mechanical aids such as levers, angle levers, inclined plane, cam, cam, eccentric, knob disk and the like.
- the three-dimensional design and the prestressed mounting of the snap-action switching element cause the spring parts holding the contact element to spread when pressure is exerted on the outer legs.
- additional holding means can be arranged, on the other hand, the actual geometry of the snap-action switching element can be changed.
- Figure l shows a partial perspective view of a snap switch.
- Figure 2 shows a perspective view of a second embodiment of the snap-action switching element.
- FIG. 3 shows a perspective view of a third exemplary embodiment of the snap-action switching element.
- Figure 4 shows a perspective view of a fourth embodiment of the snap-action switching element.
- An electrical snap switch l of the type generally described above, for. B.
- Normally opener / closer is composed mainly of a housing 2, an actuator 3 slidably guided in the housing 2, a snap-action switching element 4 assigned to the actuator 3, a contact element 5, and at least two current-carrying contact points 6 and 7.
- this snap-action switch l realized arrangement also includes a carrier 8, which is part of the housing 2.
- the snap-action switching element 4 is a curved round wire spring, which is received with a side 9 in a bearing 10 of the carrier 8. From an opposite side 11, an upwardly curved U-shaped spring 12 projects into the snap-action switching element 4, which is supported in a further bearing point 13 of the carrier 8 under slight prestress.
- the spring 12 is preferably designed to be as wide as the lateral legs 14 and 15 of the frame-like snap-action switching element 4 allow.
- its inner legs 17 and 18 are shaped slightly semicircular outwards in order to receive the contact element 5 with its circumferential annular groove 19.
- the annular groove 19 is somewhat wider than the wire diameter D, as a result of which the contact element 5 is gimbaled.
- the contact element 5 is installed through an opening 20 in the snap-action switching element 4, in that it is opened slightly resiliently when the contact element 5 is pressed in, until the contact element 5 has reached its position.
- the contact element 5 is mainly round for manufacturing reasons, but can also be elongated and / or oval in the region of its spherical contact surfaces 21 and 22 if z. B. larger contact distances or spacing of the conductor tracks make this necessary. In this case, an anti-rotation lock, not shown here on the housing side, is necessary.
- the contact surfaces 21 and 22 can be straight or convex on one or both sides as shown.
- the contact element 5 acts as a bridge and closes the contact between the contact points 6 and 7, in the example executed with round wires made of conductor material, which are located in the recesses 23 and 24 provided for this purpose in the housing 2 and are held in a manner not shown. They are part of the internal wiring.
- the snap-action switching element 4 is open on its side 9. So that the lateral legs 14 and 15 cannot move out of the bearing 10 under stress, 2 guide elements 25 and 26 are provided on both sides in the housing.
- the force applied from the outside to the snap switch 1 is transmitted by a pushbutton, not shown, in which the actuating element 3 is integrated.
- the reset takes place via the snap-action switching element 4 itself.
- Further actuation options of the actuating member 3, which is guided in the part of the housing 2 which is not shown, are of course levers and angle levers as well as rockers, sliders transversely to the actuating direction with wedge or cone elements, cam or eccentric discs.
- the snap switch 1 works from an upper rest position as a make contact when switched to the dashed position, and vice versa as a break contact. If two conductor tracks (not shown in detail) are also contacted in the upper position instead of an insulated attachment point, a changeover function results.
- FIGS. 2 to 4 are limited to the representation of the snap-action switching element 4 and show variants which counteract a possible spreading of the lateral legs 14, 15 when the snap-action switching element 4 is actuated.
- the frame-like, curved construction to promote the snap effect allows briefly an outward movement of the side legs 14, 15 under pressure, so that the bearing of the contact element 5 is undefined.
- the inner legs 17, 18 of the snap-action switching element 4 according to FIG. 2 are held together with a clamp 27 after the contact element 5 has been installed.
- the bracket 27 supports the constricting effect of the spring 12 between contact element 5 and bearing 13th
- a wire section 28 is fastened on both sides of the opening 20 on the side 11 of the snap-action switching element 4.
- the connection between the wire section 28 and the snap-action switching element 4 is rigid and can be made by welding, soldering, crimping or similar permanent fastening methods.
- the wire section 28 is advantageously only part of a long wire 29, on which further snap-action switching elements 4 are arranged at defined intervals. A means of organization and transport arises, so that the otherwise existing loose arrangement of snap-action switching elements 4 is avoided.
- the snap-action switching element 4 is only separated from the wire 29 immediately before assembly.
- FIG. 4 Another variant of the snap-action switching element 4 is shown in FIG. 4.
- the inner 17, 18 and outer legs 14, 15 intersect once, so that the actuation of the
- Snap-action switching element 4 then leads to a narrowing of the opening 20 for structural reasons.
- the contact element 5 is therefore constantly safely stored.
- Snap-action switch Housing Actuator Snap-action switching element Contact element Contact point Contact point Carrier side Bearing point opposite side Spring Bearing point Lateral leg Lateral leg Rear area Inner leg Inner leg Ring groove Opening Contact surface Contact surface Deepening Deepening Guide element Guide element Clamp Wire section Wire Wire diameter
Landscapes
- Push-Button Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4316068 | 1993-05-13 | ||
DE4316068A DE4316068C2 (de) | 1993-05-13 | 1993-05-13 | Elektrischer Schnappschalter |
PCT/DE1994/000491 WO1994027310A1 (de) | 1993-05-13 | 1994-05-03 | Elektrischer schnappschalter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0650636A1 true EP0650636A1 (de) | 1995-05-03 |
EP0650636B1 EP0650636B1 (de) | 1999-04-14 |
Family
ID=6488028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94913489A Expired - Lifetime EP0650636B1 (de) | 1993-05-13 | 1994-05-03 | Elektrischer schnappschalter |
Country Status (5)
Country | Link |
---|---|
US (1) | US5577604A (de) |
EP (1) | EP0650636B1 (de) |
DE (2) | DE4316068C2 (de) |
ES (1) | ES2129636T3 (de) |
WO (1) | WO1994027310A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117957627A (zh) | 2021-09-15 | 2024-04-30 | Eao控股股份公司 | 具有常开或常闭接触部的速动切换元件 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1201450B (de) * | 1962-08-29 | 1965-09-23 | Licentia Gmbh | Mikro-Druckknopfschalter mit Sprungschaltglied aus Draht |
DE1640264B1 (de) * | 1967-11-07 | 1970-07-30 | Grundig Emv | Umschalter mit UEbertotpunktfeder zum Einsatz in Schaltungsplatten,insbesondere zur Spannungsumschaltung |
DE2350041A1 (de) * | 1973-10-05 | 1975-04-10 | Marquardt J & J | Schnappschalter und schaltvorrichtung mit wenigstens zwei schnappschaltern |
DE3135655A1 (de) * | 1981-09-09 | 1983-03-24 | Rafi Gmbh & Co Elektrotechnische Spezialfabrik, 7981 Berg | "drucktaster fuer elektrische geraete" |
DE3236255A1 (de) * | 1982-09-30 | 1984-04-05 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Elektrischer schnappschalter |
DE3438304C2 (de) * | 1984-10-19 | 1986-10-09 | Leopold Kostal GmbH & Co KG, 5880 Lüdenscheid | Elektrischer Schnappschalter |
US4788388A (en) * | 1985-07-26 | 1988-11-29 | B/K Patent Development, Inc. | Snap acting switches |
DE3801991A1 (de) * | 1988-01-23 | 1989-08-03 | Kostal Leopold Gmbh & Co Kg | Kipphebelbetaetigter schnappfederschalter |
DE3807411A1 (de) * | 1988-03-07 | 1989-09-21 | Schaltbau Gmbh | Schnappschaltelement |
DE3829301A1 (de) * | 1988-08-30 | 1990-04-26 | Bsg Schalttechnik | Schalter zur montage auf schaltplatte |
DE4003241A1 (de) * | 1990-02-03 | 1991-08-08 | Kostal Leopold Gmbh & Co Kg | Elektrischer schalter |
-
1993
- 1993-05-13 DE DE4316068A patent/DE4316068C2/de not_active Expired - Fee Related
-
1994
- 1994-05-03 EP EP94913489A patent/EP0650636B1/de not_active Expired - Lifetime
- 1994-05-03 WO PCT/DE1994/000491 patent/WO1994027310A1/de active IP Right Grant
- 1994-05-03 ES ES94913489T patent/ES2129636T3/es not_active Expired - Lifetime
- 1994-05-03 US US08/373,301 patent/US5577604A/en not_active Expired - Fee Related
- 1994-05-03 DE DE59408110T patent/DE59408110D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9427310A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4316068A1 (de) | 1994-11-24 |
US5577604A (en) | 1996-11-26 |
EP0650636B1 (de) | 1999-04-14 |
DE59408110D1 (de) | 1999-05-20 |
ES2129636T3 (es) | 1999-06-16 |
WO1994027310A1 (de) | 1994-11-24 |
DE4316068C2 (de) | 1996-11-21 |
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