Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
  • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
  • H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
  • H01H13/02—Details
  • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
  • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2205/00—Movable contacts
  • H01H2205/016—Separate bridge contact
  • H01H2205/024—Means to facilitate positioning
  • H01H2205/03—Apertured plate
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2205/00—Movable contacts
  • H01H2205/032—Several contacts formed in one plate or layer
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2215/00—Tactile feedback
  • H01H2215/004—Collapsible dome or bubble
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2227/00—Dimensions; Characteristics
  • H01H2227/002—Layer thickness
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2227/00—Dimensions; Characteristics
  • H01H2227/026—Separate dome contact
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2229/00—Manufacturing
  • H01H2229/02—Laser
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2239/00—Miscellaneous
  • H01H2239/004—High frequency adaptation or shielding

Definitions

• the invention is concerned with keyboard assemblies which, prior to or during the manufacture of, for example, an electrical contact, by actuation of a button-order button, indicate to the user, by a tactile "switch-over", the desired contact and, upon release of the button, return it to its original position
• keyboard assemblies which, prior to or during the manufacture of, for example, an electrical contact, by actuation of a button-order button, indicate to the user, by a tactile "switch-over", the desired contact and, upon release of the button, return it to its original position
• Such keyboard arrangements are widely used and are used, for example, in remote controls for entertainment equipment or in telephones.
• a snap disk is essentially a curved metal or plastic component having a nonlinear spring characteristic and which span a space with the head resting against the zenith surface of the domed member in its initial position, if a force acts on the knob to cause electrical contact, the snap disc is elastically deformed by flattening the bulge, thereby decreasing the force , which is required to Abplatten the snap-action, easy to and then, when the bulge is pressed approximately flat, smaller than force required for flattening.
• the spring direction of the snap disc reverses, including the K acting in this moment raft is less than the force required to flatten the curvature.
• the respective snap-action disc 1 is arranged centrally within a passage 2 of a plate 3 and the mutual radial distance with a suitable plastic material 4 resulting from the cross-sectional relationships of snap disc 1 and aperture 2 filled, whereby the snap disk 1 formed of metal is suspended elastically in the respective opening 3.
• this technology is very expensive, since on the one hand the plate with the openings and the snap discs, for example by punching and / or
• the invention is therefore based on the object of specifying a keyboard arrangement which, in addition to high flexibility in the production and design changes, also forms a complete shield against high-frequency radiation.
• domes and the plates are made individually, these components can be manufactured with relatively simple punching and embossing tools and are very easily connected to complex units, for example by laser welding.
• the domes for a variety of applications can be made with one and the same set of tools, a very high degree of standardization is achieved. Since the diameter of the snap discs is always larger than the clear cross sections of the openings, it is ensured that the keyboard assembly according to the invention ensures complete shielding against unwanted frequencies by the complete coverage or the closure of the respective breakthrough with a snap disc, which are arranged from below the plate electrical components are emitted or act on these.
• the snap discs and integrally connected to them webs may be formed of metal or metallized plastic and electrically conductively connected to the plate.
• the formation of the arranged below the keyboard assembly electrical contacts per snap disk can be limited to a contact element.
• the edge regions of the snap-action disc which is not fixedly connected by means of webs to the plate, slidably on the surface of the plate ensures that a sufficiently large radial extent of the snap-action disc to bring about the "switching crack" is possible.
• a reduction of the components is ensured according to claim 4, characterized in that at least two of a plurality of snap discs are connected by means of a common web with the plate.
• other existing in the plate breakthroughs which are required for example because of the height of components, can be very easily frequency close by means of snap discs by also such breakthroughs are covered by "blind" snap discs to avoid the damage of such Components must then only be ensured that such snap discs are not in direct contact with any button in the keyboard.
• each snap disc is at least two webs fixedly connected to the plate, wherein each web used for stationary connection with the plate is provided with a hinge.
• each web used for stationary connection with the plate is provided with a hinge.
• the snap disc according to claim 8 has a convex bead on its zenith surface, the curvature of which extends into the space which is spanned by the curvature of the snap disc, even large distances between the zenith surface and the contact surface (s) on the printed circuit board can be overcome.
• the printed circuit board or conductor foil protrudes at least into the spaces that are surrounded by the openings. Also allow the training according to claims 7 to 10 relatively thick, necessary for shielding plates without the function of the "switching crack" is lost.
• Fig. 1 shows a keyboard arrangement according to the prior art in side section
• FIG. 2a shows a keyboard arrangement according to the invention in side section
• Fig.2b another embodiment of the invention also in side section;
• FIG. 3a shows a plan view of a keyboard arrangement according to Fig. 2a;
• FIG. 3b a further embodiment of a keyboard arrangement according to FIG. 3a;
• FIG. 4 shows a further embodiment of a keyboard arrangement according to FIG. 3a;
• FIG. 5 shows a further embodiment of a keyboard arrangement according to FIG. 3a;
• FIG. 6 shows a combination of two snap disks according to FIG. 2a.
• FIG. 7 shows another embodiment of a snap-action disc.
• a first embodiment of the keyboard assembly according to the invention is shown in its initial position.
• This keyboard assembly has a curved Snap disc 1 made of metal, which is formed dome-shaped and spans the underlying space 5.
• This snap-action disc 1 is integrally connected to a web 6.
• a metal plate 3 is also provided, which has an opening 2.
• the snap-action disc 1 is connected to the plate 3 only by means of the single web 6 by Lasersch adoptedung X.
• a printed circuit board 7 is shown below the plate 3, on which two electrical contact surfaces 8, 9 are arranged. Only the completeness should be noted that the mutual distance shown in Fig. 2a between the plate 3 and the circuit board 7 need not necessarily be present, but only for the sake of better illustration in Fig. 2a was added.
• the diameter D 1 of the snap disk 1 is greater than the clear cross section D 2 of the aperture 2. This ensures that in each position the snap disk 1 together with the plate 3 components, which are arranged in the direction of arrow Pl below the plate 3 and the snap disk 1, shields.
• FIG. 2b another shape of the breakthrough 2 covering snap disc 1 is shown. Like the snap disk 1 shown in FIG. 2a, the snap disk according to FIG. 2b also vaulted over the opening 2 completely. However, since the plate 3 often has to be made relatively thick for the purpose of producing a suitable shielding, it may happen that a snap disk 1 formed only in the shape of a dome according to FIG In the production of an electrical contact, the "switching crack" has already been generated, although no electrical contact has yet been made. Therefore, the snap disc 1 according to FIG. 2b is provided on its zenith surface Z with a convex bead 10, the curvature of which extends into the space 5 , which is spanned by the snap disk 1.
• Fig. 2b can be removed, that only a contact surface 8 'is arranged on the circuit board 7.
• the snap disk 1 In order to initiate an electrical contact in only one contact surface 8 'when the snap disk 1 makes physical contact with the contact surface 8', it is necessary for the snap disk 1 to lie "on ground.” Since the snap disk 1 according to FIG and with the plate 3, which is also made of metal, this is solved in the present case, that in the embodiment of FIG. 2b, the plate 3 "on ground".
• the circuit board 7 may be formed as a conductor foil.
• Fig. 2b shows a further snap disc 1 ', which is juxtaposed to the snap disc 1, and which is like the snap disc 1 capable of generating a "switching crack "Schaltknacks" used when performing an electrical contact, but only serves the shielding of a component 12 on the circuit board 7, which protrudes because of its height from the plate 3.
• the component 11 would be replaced by at least one contact surface 8 'in Fig. 2b and 6 respectively.
• Fig. 3b another form of the web 6 is shown, with which the snap disc 1 is connected to the plate 3.
• the web according to FIG. 3 b is serrated, the serration forming a joint 11.
• the webs 6 are as shown in Fig. 3b and Fig. 4 near their free ends with the plate 3 by laser welding X. connected.
• Fig. 5 shows a combination of four snap discs 1, which are arranged above corresponding openings 2. All four snap discs 1 are integrally connected to each other via common webs 6 and can therefore be made in a punching pass.
• a conductor foil T is present in FIG. 7 instead of a printed circuit board 7.
• the conductor foil 7' projects into the space 12, which is bordered by the opening 2.

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• Push-Button Switches (AREA)
• Input From Keyboards Or The Like (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=37084872

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (3)

• 2006
  • 2006-08-26 DE DE502006002220T patent/DE502006002220D1/de active Active
  • 2006-08-26 AT AT06791677T patent/ATE415692T1/de not_active IP Right Cessation
  • 2006-08-26 EP EP06791677A patent/EP1920449B1/fr not_active Not-in-force
  • 2006-08-26 WO PCT/EP2006/008379 patent/WO2007025684A1/fr not_active Ceased

Non-Patent Citations (1)

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