Round Metal Dome Feature
Shape:round
Diameter:3-20mm
Force:100-600gf
Surface plated:gold, silver, nickle
A Round Metal Dome is a momentary switch contact that functions as a normally-open switch when used with printed circuit boards (PCBs), flexible circuits, or membrane switches. They are typically mounted on PCBs using transparent adhesive films.
In their resting state, the tactile metal dome maintains contact only with the outer perimeter of the primary contact pad. When momentarily depressed, the dome collapses to establish contact with the secondary circuit path, thereby completing the electrical circuit.
Uses of Round Metal Dome
Round Metal Domes are commonly used as core components in tactile switches. When a user gently presses the switch, the potentiometer disc deforms, thereby triggering the opening or closing of the circuit. This design not only provides an excellent user experience but is also widely praised for its high sensitivity and long service life. Round Metal Dome can be found in various electronic devices, such as calculators and electronic clocks.
Membrane switches are a common input device in modern electronic devices, and circular dome switches are an important component of them. In membrane switches, dome switches serve to transmit pressure and trigger the circuit. Due to their small size, light weight, and stable performance, circular dome switches are widely used in membrane switches, providing users with a convenient operating experience.
Remote controls, an indispensable tool in modern home and office environments, also extensively utilize circular dome switches internally. These dome switches serve as contact points for buttons. When a user presses a button on the remote control, the dome switch quickly responds to complete the circuit connection or disconnection. This rapid and accurate response capability enables the remote control to send commands in real-time, meeting users' needs for remote control.
Adjustable Settings According To Customer Requirements:
Actuation force: Customers may specify the desired actuation force value within standard parameters.
Upstroke/return force: This may refer to the dome's return force when the key springs back to its original position after being pressed.
Click rate: This may denote the tactile feedback ratio or the clarity of the clicking sound when the key depresses.
Travel: The displacement distance of the dome membrane during actuation.
Height: The overall structural height of the dome membrane assembly.
These parameters are critical for designing membrane switches, ensuring optimal tactile feedback and durability in applications such as mobile phones and other electronic devices.
How To Choose A Metal Snap Dome?
Circular metal dome: This circular specialised structure occupies minimal space, making it suitable for electronic devices with limited space. Its design balances tactile feedback with strength requirements, delivering outstanding performance in devices like mobile phones requiring a lifespan exceeding one million cycles.
Oval Metal Dome: This dome features a regular waist-shaped circle, cut from both sides of a circular dome, serving as a suitable alternative to circular domes. Its advantages are particularly evident in confined single-direction spaces, with both oval and rectangular metal domes delivering excellent tactile feedback.
Four-Leg Metal Dome: Four-leg microswitches feature four support legs, offering extended travel and distinct actuation sound. Suitable for handheld devices, medical equipment, and banking apparatus with ample PCB space requiring substantial travel.
Triangular Metal Dome Switch: The triangular metal microswitch is the preferred solution when confined space necessitates both excellent tactile feedback and high actuation force. Available in both footed and footless variants, selection depends on PCB thickness and assembly requirements.
Custom Special-Shaped Metal Domes: Beyond circular, elliptical, triangular, and four-leg series, all other forms are categorised as special shapes. All types are customisable; special-shape products can be manufactured to specifications including form, dimensions, and strength. Please contact us for requirements.
