EP0990244A1 - Snap-on wafer switch - Google Patents
Snap-on wafer switchInfo
- Publication number
- EP0990244A1 EP0990244A1 EP99927695A EP99927695A EP0990244A1 EP 0990244 A1 EP0990244 A1 EP 0990244A1 EP 99927695 A EP99927695 A EP 99927695A EP 99927695 A EP99927695 A EP 99927695A EP 0990244 A1 EP0990244 A1 EP 0990244A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- snap
- snap disk
- bead
- disk
- contact element
- 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
- 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 curved snap disk which has a switching contact in a bead arranged in the highest point of the curvature.
- Such snap disk switches are well known in the prior art and are used regularly in the field of keyboards.
- the switching contact of the known snap disk switches is regularly a spherical curvature which extends inwards in the radial direction of the snap disk.
- the spherical curvature is produced by inserting the snap disk into a correspondingly shaped pressing tool.
- the switch contact is designed as a separate contact element which is fastened in the bead. Due to the separate design of the contact element, which is not integral with the snap disk, it is advantageously possible to produce the contact element from a different material than the snap disk.
- the material of the snap disk can thus be selected with regard to the spring or snap action of the snap disk, whereas the material of the contact contact can be selected with regard to an optimal switching behavior.
- the switch contact can be welded or riveted onto the snap disk. Both fastenings have proven to be very advantageous in terms of service life.
- the bead As a flat surface, This creates a neutral zone for the mechanically attached switch contact.
- the bending stress of the snap disc is interrupted.
- the attachment of the switch contact is therefore free of material movements of the snap disk, which makes the attachment very durable.
- the bead extends outward in the radial direction of the snap disk. On the one hand, this has a favorable effect on the spring action of the snap disk. On the other hand, the switching path of the snap disk is not reduced by the application of the contact element.
- FIG. 1 is a top view of a snap disk designed according to the invention with a welded-on contact element
- FIG. 2 shows the snap disk shown in FIG. 2 in a side view in section
- FIG. 3 shows a top view of a snap disk with a riveted contact element
- FIG. 4 shows the snap disk shown in FIG. 3 in a side view in section
- Figure 5 is a conventionally designed snap disc
- Figure 6 shows the snap disk shown in Figure 5 in side view in section.
- a domed snap disc 1 has a bead 2 at the highest point of its curvature.
- the bead 2 is formed as a flat surface, which was produced by cold working.
- the sink 2 is thus delimited by an edge which is bent away sharply from the snap disk.
- the edge could also be designed as a groove.
- the bead 2 extends in the radial direction of the snap disc 1 to the outside.
- the bead 2 has a separate contact element 3, which extends inwards in the radial direction of the snap disk 1.
- the contact element 3 is welded onto the snap disk 1.
- the contact element 3 consists of silver materials or multi-layer materials, whereas the snap disk 1 consists of a spring material, such as stainless steel, copper beryllium or spring bronze.
- the snap disc 1 also partly has a half-shell shape because of its curvature, it is nevertheless approximately star-shaped. This results in four mounting points 4, by means of which the snap disc 1 can be fastened in a switching element.
- the snap disk 1 is fastened in a snap element in such a way that in the installed state of the snap disk 1, a further, similarly designed contact element is arranged relative to the contact element 3.
- the snap disk shown in FIGS. 3 and 4 essentially corresponds to the snap disk shown in FIGS. 1 and 2.
- the same elements are provided with the same reference symbols, the reference symbols being provided with a dash to distinguish the elements.
- the snap disk shown in FIGS. 3 and 4 The only difference between the snap disk shown in FIGS. 3 and 4 is that the bead 2 'has an opening in which a contact element 3' is riveted.
- the snap disk 1 ' is otherwise designed in exactly the same way as the snap disk 1.
- the conventional snap disk 1 "shown in FIGS. 5 and 6 does not have a separate contact element.
- the switching contact is represented by a spherical bead 2" which extends in the radial direction of the snap disk 1 " extends inwards, making it impossible to switch larger outputs.
Landscapes
- Manufacture Of Switches (AREA)
- Push-Button Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19816946A DE19816946C1 (en) | 1998-04-17 | 1998-04-17 | Snap disk switch |
DE19816946 | 1998-04-17 | ||
PCT/DE1999/001193 WO1999054899A1 (en) | 1998-04-17 | 1999-04-17 | Snap-on wafer switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0990244A1 true EP0990244A1 (en) | 2000-04-05 |
EP0990244B1 EP0990244B1 (en) | 2002-11-20 |
Family
ID=7864760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99927695A Expired - Lifetime EP0990244B1 (en) | 1998-04-17 | 1999-04-17 | Snap-on wafer switch |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0990244B1 (en) |
DE (2) | DE19816946C1 (en) |
ES (1) | ES2203149T3 (en) |
WO (1) | WO1999054899A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10051500C2 (en) * | 2000-10-17 | 2002-10-24 | Inovan Stroebe | Switching element with a snap disk and a snap disk switch |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2262777A (en) * | 1940-09-21 | 1941-11-18 | John M Roper | Quick acting positive contact switch |
US2977440A (en) * | 1958-11-05 | 1961-03-28 | Benjamin S Gerson | Flasher switch |
GB1195702A (en) * | 1967-05-12 | 1970-06-24 | Harry Stanley Woodhead | Hermetically Sealed Push Switch |
GB1224004A (en) * | 1967-08-18 | 1971-03-03 | Drayton Hydroflex Ltd | Improvements in or relating to snap-action switching arrangements |
DE7837597U1 (en) * | 1978-12-19 | 1979-04-26 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Keypad with several push buttons |
US4438304A (en) * | 1982-10-01 | 1984-03-20 | Cherry Electrical Products Corporation | Double throw snap action switch |
FR2735276B1 (en) * | 1995-06-12 | 1997-07-18 | Itt Composants Instr | TOUCH-EFFECT SWITCH AND TRIGGERING DEVICE FOR SUCH A SWITCH |
-
1998
- 1998-04-17 DE DE19816946A patent/DE19816946C1/en not_active Expired - Fee Related
-
1999
- 1999-04-17 ES ES99927695T patent/ES2203149T3/en not_active Expired - Lifetime
- 1999-04-17 EP EP99927695A patent/EP0990244B1/en not_active Expired - Lifetime
- 1999-04-17 WO PCT/DE1999/001193 patent/WO1999054899A1/en active IP Right Grant
- 1999-04-17 DE DE59903456T patent/DE59903456D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9954899A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999054899A1 (en) | 1999-10-28 |
ES2203149T3 (en) | 2004-04-01 |
DE59903456D1 (en) | 2003-01-02 |
DE19816946C1 (en) | 2000-03-09 |
EP0990244B1 (en) | 2002-11-20 |
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