Membrane switches

We realize customer-specific membrane switch and advise you comprehensively on equipment requirements and technical features.

Folientastatur
Folientastatur

Due to the extraordinary variety of design options, membrane switches are used in almost every type of electronic device. The ergonomic and design requirements are nearly unlimited.

Membrane switches are dirt and water resistance. They are used when a compact design is needed or a small number of units are desired because of comparatively low tooling costs.

You can choose from a variety of constructions of varying tactility and a wide range of viewing windows, screens and lighting options. In addition, we offer the patented Duraswitch technology.

Advantages

  • low weight, space saving
  • backprinting of the film for a robust, individual design
  • individual tactility
  • dustproof and water resistant, resistant to chemicals (solvents)
  • easy to clean
  • over 1 million life-time cycles
  • EMC shielding possible

 

Construction

Aufbau einer Folientastatur

A keypad consisting of a plurality of individual layers which are superposed on each other.  By default, there is a membrane keyboard from 5 basic foils: decorative foil, upper & lower switching foil,  a spacer film and a adhesive foil.

The decorative foil is made of polyester or polycarbonate and ensures the highest possible protection against abrasion. For applications in the medical field and areas with high hygienic requirements, the front foil can be equipped with an antibacterial coating. Also UV-resistant polyester for outdoor use is possible.

Functional elements are the lower circuit foil with the conductor tracks, switching points and the terminal lug located thereon, as well as the upper switching foil with the contact surfaces which lie opposite the switching points on the lower foil. The upper switching foil can be dispensed if it is replaced by metal domes, or the contact surfaces are printed directly on the decorative foil.

For special applications and complex circuits, the lower switching foil is made of polyimide (Kapton) instead of polyester. A hard printed circuit board made of FR4 is suitable for circuit design and at the same time acts as a carrier plate with mounting screws or sockets. The spacer foil as an insulator separates the upper and lower switching foil; in a version with metal domes, it has the task of fixing foil.

Tactility

NH Folientastatur Muster
The N&H sample membrane switch will be sent to you on request.

 

Metal dome


For a striking tactility and higher actuation force metal domes can be used. When the metal dome is actuated, it snaps downwards and establishes contact between two printed conductors.

 

Embossing


Membrane switches without metal domes may also have tactile feedback using dome embossing design. The dome embossing can be done in the decorative film as well as in the upper switching film. For a stronger operating force and tactility, even both of the two films can be shaped.

Equipment Options

 

LED’s


LEDs can be easily integrated into membrane keyboards by the integration of an additional LED switching foil. Special adhesives and sealing materials are used to control the function of the LED even in a harsher environment with e.g. ensure strong vibration.

 

Light Guide Film, also with disappearance effect


Folientastatur mit Light Guid Film Verschwindeeffekt
Folientastatur mit Light Guid Film Verschwindeeffekt

Backlighting of membrane switch can be done by using LGF (Light Guide Film). The typical flat design and flexibility are retained. In the LGF technology, LEDs are used on the edge in a very thin (0.1 - 0.2 mm), highly refractive film. Due to the high refraction of light only very few LEDs are required for homogeneous illumination. The backlighting of each button can be done in different colors.

Also with the LGF technology a "disappearance effect" can be realized. The keyboard symbols are only visible when the HMI device is switched on.

 

Membrane switch with integrated touch panel


An integrated touch panel creates a combined input system that considerably simplifies and sensibly complements the application control.

 

Folientastatur mit Drehgeber und Sichtfenster
Memebrane Switch with integated windows and rotary encoder

 

Membrane Switch with integated windows


Depending on the requirements and optical design, it is possible to specify versions such as glossy, matt, anti-reflective, scratch-resistant, UV-resistant and colored for the viewing windows of the LCD and LED.

 

Duraswitch Technology


The Duraswitch © technology enables the integration of push buttons with tactile feedback, rotary encoders (rotary encoders and analog potentiometers) and cursor controls. Compared to separate solutions, the integrated solution is much more cost-effective.

 

Metal plate


For reinforcement, the membrane keyboard can be mounted on various carrier plates. As standard, aluminum plates may be used with fastening bolts.

 

Protection


  • EMC protection: All keyboards can be provided with appropriately printed masks to comply with the requirements for electromagnetic shielding.
  • IP ratings: To ensure use in extreme environments that are dust or water intensive, IP65 rated protection is required.

Design

 

Memebrane switch with silicone keys / rubber design


Folientastatur mit Silikontasten Silikonabdeckung

The membrane switch is as usual provided with a polyester decorative film, but the buttons are made of silicone. The keys have a grippy key surface, which gives the feeling of a high-quality keyboard. The key shape can be realized in various geometries. Alternatively, the decorative film is completely replaced by a silicone layer. This allows for outstanding buttons with free shaping, guide elements such as offset rings around a key, Braille lettering or cursor keys. At the same time, the surface is upgraded visually and haptically.

 

Memebrane Switch in metal design


Folientastatur in Metalloptik

Specially embossed films can be used to achieve metal-optic effects, such as brushed stainless steel or anodised aluminum.

 

Memebrane Switch with epoxy coating


Folientastatur mit Epoxy Coating

High-quality three-dimensional design elements can be realized with epoxy. Instead of a "normal" embossing, epoxy material is applied to the button, which creates a particularly high-quality and glossy surface due to its transparency. The epoxy design can be used with most membrane keyboards.

PC Folientastatur
Membrane Keyboards

 

We offer a selection of membrane keyboards on aluminum plate as standard solution. The layouts can be customized. The membrane keypads are suitable for indoor and outdoor use and are insensitive to wind-driven dust and rain, spray water and water jets, as well as disinfectants. Due to the good cleanability of the surface, medical applications are possible.

  • "Clean" Function Key - Keyboard can be cleaned without disconnecting computer.
  • Resistant polyester - insensitive to most chemicals and liquids.
  • Aluminum plate with fastening bolts
  • Operating systems: All Windows, Linux, Unix, Mac OSX, Vxworks, Android
  • IP65 / NEMA 4X
  • Lifespan > 3 million actuations

 

ImageArtikel /
Datenblatt
LängeBreiteBeschreibung
NHKT-D100-KP-16 10090Folientastatur Fronteinbau
16 Tasten
2 mm Aluminiumplatte mit Bolzen
Layout Weiß
NHKT-D119-KP-24 11990Folientastatur Fronteinbau
24 Tasten
2 mm Aluminiumplatte mit Bolzen
Layout Weiß
NHKT-D185-MTB-KP185135Folientastatur Fronteinbau
38 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz
Trackball
NHKT-D200 20095Folientastatur Fronteinbau
78 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß.
NHKT-D224 224110Folientastatur Fronteinbau
47 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß
NHKT-D272 272125Folientastatur Fronteinbau
79 Tasten
2 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß
NHKT-D320 320125Folientastatur Fronteinbau
97 Tasten
2 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß
NHKT-D321 321139Folientastatur Fronteinbau
107 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß
NHKT-D333-TB 333150Folientastatur Fronteinbau
84 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß
Trackball
NHKT-D396DT 396148,8Folientastatur Fronteinbau
107 Tasten
VESA Norm
Layout Schwarz oder Weiß
NHKT-D396DT-TP 399148,8Desktop Folientastatur
108 Tasten
VESA Norm
Layout Schwarz oder Weiß
Touchpad
NHKT-D396DT-TB 399148,8Desktop Folientastatur
108 Tasten
VESA Norm
Layout Schwarz oder Weiß
Trackball
NHKT-D410-KP-FN410160Folientastatur Folientastatur Fronteinbau
107 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz
Trackball
NHKT-D410-TB-KP-FN-SW 410160Folientastatur Folientastatur Fronteinbau
108 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz
Trackball
NHKT-D410-TP-KP-FN-SW 410160Folientastatur Fronteinbau
108 Tasten
3 mm Aluminiumplatte mit Bolzen
Layout Schwarz
Touchpad
NHKT-D343-TP 434125Folientastatur Fronteinbau
81 Tasten
2 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß
Touchpad
NHKT-D343-TB 434125Folientastatur Fronteinbau
81 Tasten
2 mm Aluminiumplatte mit Bolzen
Layout Schwarz oder Weiß
Trackball

Anfrage bei N&H Technology

 

On the basis of your sample, your specification or technical drawing, we will create an individual offer and support you during the project.

We advise you on the selection of suitable materials and offer cost reduction options. We offer you an active co-operation in the development and construction and give suggestions for improvement.

For a technical consultation please contact us by phone: +49 (0) 2154 - 81250. Also a personal meeting in our office or at your place is possible by appointment.

For an offer we need:

  • technical drawing, sketch or pattern
  • technical specifications, equipment extras
  • required amount

Please send following informations to: info@nh-technology.de

One of our engineering experts will contact you asap.

Of course, you can also use our contact form

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