PushGate® - Overview
Overview | Configuration | Technical Specifications
Pushgate is a revolutionary switch based on the magnetic properties of thin magnets, developed by Duraswitch Technologies. Although it is a switch as well as a dome, we devote a particular section to this product because of its innovative approach and its distinctive integration to the membrane keypad. GGI International is able to offer you the integration of this new technology to your needs of membrane keypads requiring a key having a distinct and effective tactile contact.
The operating principle behind the Pushgate switch is as simple as it is effective. A magnetic layer is placed within the composition of the membrane keypad and includes an opening to accommodate a metal armature. When the key is in the open position (not activated), the armature is retained by the magnet away from the electric circuit. When the key is activated, the armature is pushed away from the magnet to create a contact with the keypad circuit. The circuit is then closed. When the key is released, the armature is no longer under pressure and is attracted again by the magnet. The circuit returns to the open condition.
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| 1st stage: Open circuit | 2nd stage: Key is activated | 3rd stage: Closed circuit | 4th stage: Open circuit |
BASIC CHARACTERISTICS:
- Sizes available: armature diameter of 0.406" or 0.625"
- Plating available: nickel, silver or gold
- Typical actuation force: 10 oz / 227 g / 2.2 N
- Rebound duration from contact: 1 ms
- Travel: 0.012"
- Typical minimum distance between the keys (centre to centre): 406 armature = 0.500" / 625 armature = 0.731"
- Absolute minimum distance between the keys (centre to centre, under certain conditions): 406 armature = 0.294" / 625 armature = 0.491"
- Lifespan: more than 20 million actuations
- Typical operating temperature: from -45 °C to +85 °C
- Typical storage temperature: from -45 °C to +85 °C
- Electrical characteristics vary according to the type of circuit used. Consult GGI International for further information in this respect
BENEFITS:
- Superior tactile effect, akin to a mechanical button
- No deformation of the armature, therefore no material fatigue
- No degradation of the tactile effect over time
- Very high lifespan
- Great flexibility of design and possibility of integrating a large variety of technologies and components
CONSIDERATIONS:
- Construction of the membrane keypad is thicker than for a dome-type keypad. Minimum typical thickness = 0.079" with embossed keys and 0.088" with non-embossed keys
- Generally, the switch requires that the air be evacuated outside of the membrane keypad
- The surface of adhesion of the membrane keypad must be perfectly flat
- Limited number of armature sizes available