EP0990243A1 - Snap-on wafer switch with a fixing element - Google Patents
Snap-on wafer switch with a fixing elementInfo
- Publication number
- EP0990243A1 EP0990243A1 EP99926274A EP99926274A EP0990243A1 EP 0990243 A1 EP0990243 A1 EP 0990243A1 EP 99926274 A EP99926274 A EP 99926274A EP 99926274 A EP99926274 A EP 99926274A EP 0990243 A1 EP0990243 A1 EP 0990243A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- snap
- snap disk
- elements
- fastening
- support
- 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
- H01H5/30—Energy stored by deformation of elastic members by buckling of disc springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2207/00—Connections
- H01H2207/032—Surface mounted component
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2227/00—Dimensions; Characteristics
- H01H2227/026—Separate dome contact
Definitions
- the invention relates to a snap disk switch according to the preamble of claim 1 with a domed snap disk which is supported on a base element via at least two support elements.
- Such snap disk switches are well known in the prior art and are mainly used in the field of keyboards. Since one of the switch contacts is regularly arranged on the snap disk and the corresponding mating contact is on the base element, it is necessary to fix the snap disk in its position. This happens regularly in that the snap disk is arranged within a recess or appropriate limits are placed around the snap disk. Because of the design, the support elements cannot be firmly connected to the base element, since the support elements make a slight movement when the snap disk is actuated. Fastening the support elements on the base element would therefore seriously impair the function of the snap disk and would not be durable due to the forces acting on the fastening. It is an object of the invention to design a snap disk switch mentioned at the outset in such a way that the snap disk can be fixed in a simple manner on the base element.
- At least one support element has a fastening element, by means of which the snap disk can be fixed on the base element.
- the fastening element it can advantageously be achieved that the support element is movably connected to the base element to a small extent.
- the support element can thus carry out the movement caused by the actuation of the snap disk. Since the movement made by the support element is essentially a torsional movement, the snap disc remains in its position. Further measures for fixing the snap disk on the base element are no longer necessary.
- the fastening element is advantageously connected to the support element via compensating webs.
- the torsion movement of the support element is cushioned by the compensating webs, so that only a very low torsional force acts on the fastening element. Since the magnitude of the torsional force depends on the design of the compensating webs, the compensating webs must be dimensioned so that there is an optimum between the torsional force acting on the fastening elements and the force with which the snap disk is held in position . If the compensating webs are dimensioned too weakly, the torsional force acting on the fastening elements is very small, but there is a risk that the snap disk will not be held in its exact position, since the compensating webs could bend.
- the compensating webs must also not be dimensioned too strongly, since on the one hand the torsional forces acting on the fastening elements are too great and a linear movement of the support elements is no longer possible. This would be disadvantageous since, although the support elements also essentially perform a torsional movement. ren, the support elements also perform a slight linear movement when the snap disk is actuated.
- the fastening element has a surface which can be fastened by means of the so-called SMD technology.
- the snap disk can advantageously be attached very efficiently to the base element.
- the fastening element can also have a plug-in foot, by means of which it can be fastened in an opening.
- a plug-in foot by means of which it can be fastened in an opening.
- the snap disk and the fastening element are optionally formed in one piece with the plug-in foot, as is provided in a further special embodiment of the invention.
- Figure 1 shows a first embodiment of a designed according to the invention
- FIG. 2 is a top view of the snap disk shown in FIG. 1,
- Figure 3 shows a second embodiment of a designed according to the invention
- FIG. 4 is a top view of the snap disk shown in FIG. 3,
- Figure 5 shows a third embodiment of an inventive
- Figure 6 shows the snap disk shown in Figure 5 in plan view
- Figure 7 shows the snap disk shown in Figure 5 in side view.
- a curved snap disk 1 of a snap disk switch has a switch contact 10 at the highest point of the curvature.
- the switch contact 10 is designed as a spherical curvature which extends inwards in the radial direction of the snap disk.
- the snap disc 1 rests on a base element 6 by means of four support elements 2, 3, 4, 5.
- the support elements 2, 3, 4, 5 are designed as a bend in the corresponding part of the snap disc 1.
- a tab-shaped fastening element 7 extends.
- the fastening element 7 essentially consists of two flat surface elements which are designed such that they can be fastened by means of the so-called SMD technology.
- the surface elements 7 are connected in one piece to the support element 2 via narrow webs 8.
- the support elements 2, 3, 4, 5 exert, among other things, a rotary movement.
- the movement of the support element 2 is absorbed essentially resiliently by the connecting webs 8, so that a very low residual force is transmitted to the surface elements 7.
- the low force that is transmitted to the surface elements 7 means that the fastening elements 7 have a very long service life.
- the snap disk 1 is held in position by the fastening elements 7.
- FIG. 3 and 4 show a second embodiment of a snap disk according to the invention.
- the same elements are provided with the same reference symbols; to distinguish them, the reference symbols are simply provided with a dash.
- the two flat elements elements T each on a plug-in foot 9 '.
- the plug feet 9 ' extend in the direction facing away from the snap disc V and are formed in one piece with the surface elements T as a bent sheet metal part.
- the plug-in feet 9 ' are very suitable for fastening the snap disk 1' on a circuit board.
- the circuit board only has to have bores into which the plug-in feet 9 'are inserted.
- FIGS. 5 to 7 show a further embodiment of a snap disk according to the invention; identical elements are provided with the same reference symbols; to distinguish them, however, the reference symbols are provided with two dashes.
- the snap disk shown in FIGS. 5 to 7 differs from the snap disks described above in that the support elements 2 ", 3", 4 “, 5" are not arranged evenly distributed over the circumference of the snap disk 1 "but are arranged in pairs opposite one another two support elements 2 ", 3" and 4 “, 5" extend in the same direction. As a result, for each pair of support elements 2 ", 3", 4 “, 5" there is a flat element 7 ".
- the flat element 7 " is connected to the support elements 2", 3 “, 4", 5 "via approximately S-shaped webs 8".
- connecting webs 8 makes it particularly easy to compensate for linear movements of the support elements 2", 3 ". This makes it possible for the opposite support elements 4", 5 “to be connected to a further flat element 7 via connecting webs 8" " are connected.
Landscapes
- Switch Cases, Indication, And Locking (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823894 | 1998-04-18 | ||
DE19823894A DE19823894C1 (en) | 1998-04-18 | 1998-04-18 | Snap disc switch with fastener |
PCT/DE1999/001194 WO1999054900A1 (en) | 1998-04-18 | 1999-04-17 | Snap-on wafer switch with a fixing element |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0990243A1 true EP0990243A1 (en) | 2000-04-05 |
EP0990243B1 EP0990243B1 (en) | 2002-09-11 |
Family
ID=7869199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99926274A Expired - Lifetime EP0990243B1 (en) | 1998-04-18 | 1999-04-17 | Snap-on wafer switch with a fixing element |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0990243B1 (en) |
DE (2) | DE19823894C1 (en) |
WO (1) | WO1999054900A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006021474A1 (en) * | 2006-05-09 | 2007-11-15 | Härter Werkzeugbau GmbH | Keyboard arrangement for use in e.g. telephone, has snap disc fixedly connected with surfaces of plate, where diameter of disc is larger than open cross-section of perforation to completely cover disc when it is connected with plate |
DE102006010811B4 (en) | 2006-03-07 | 2018-03-01 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Switching element and actuator so that as well as door handle with this actuator |
DE102006024292A1 (en) | 2006-05-24 | 2007-11-29 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Handle for electrically actuating a closure on a flap or door in a vehicle |
DE102007062901B3 (en) * | 2007-12-21 | 2009-05-07 | Kleiner Gmbh | Snap disk, has fastening part with surface that is provided with adhesive, where surface provided with base element is turned away from adhesive, and part fastening spherical cap-shaped curved region |
DE102009033486B4 (en) | 2008-09-30 | 2018-12-27 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | operating unit |
DE102009046704A1 (en) * | 2009-07-15 | 2011-01-20 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Electric switch |
DE102010006167B3 (en) * | 2010-01-29 | 2011-07-28 | MENTOR GmbH & Co Präzisions-Bauteile KG, 40699 | Illuminatable key button cap for sheet-covered keyboard for actuation of switching elements, has key disk illuminatable by light source, where key disk and pusher formed as combinely mountable key unit |
EP2645391B1 (en) * | 2012-03-27 | 2016-10-12 | RAFI GmbH & Co. KG | Switch device and switch contact |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2705756C2 (en) * | 1977-02-11 | 1982-09-02 | Alps Electric Co., Ltd., Tokyo | Push button switch for electronic desk calculators or the like. |
CH676765A5 (en) * | 1988-06-14 | 1991-02-28 | Elma Electronic Ag | |
CH677552A5 (en) * | 1989-04-10 | 1991-05-31 | Sulzer Ag | |
GB2308500B (en) * | 1995-12-22 | 1999-07-21 | Nokia Mobile Phones Ltd | A domed contact element for a keypad assembly |
-
1998
- 1998-04-18 DE DE19823894A patent/DE19823894C1/en not_active Expired - Fee Related
-
1999
- 1999-04-17 DE DE59902636T patent/DE59902636D1/en not_active Expired - Lifetime
- 1999-04-17 EP EP99926274A patent/EP0990243B1/en not_active Expired - Lifetime
- 1999-04-17 WO PCT/DE1999/001194 patent/WO1999054900A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9954900A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999054900A1 (en) | 1999-10-28 |
DE59902636D1 (en) | 2002-10-17 |
DE19823894C1 (en) | 2000-01-05 |
EP0990243B1 (en) | 2002-09-11 |
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