What are the different categories of membrane panel switches?

Release date:

Http://www.zdxtt.com/

2020-12-10

Thin-film panel switch Classified by structure

1. Flat, Touchless Type: Long lifespan but lacks tactile feedback.

2. Film-type convex touch: Offers a pleasant tactile feel but has a relatively shorter service life.

3. Convex-frame, Touchless Membrane Panel Switch: Features an elegant design with a strong three-dimensional effect, yet lacks tactile feedback.

4. Convex border-type tactile design: Offers a visually appealing, highly three-dimensional appearance with a distinct tactile feel.

Thin-film panel switch

5. Flat-panel embossed tactile type

Type A: Occurs in different periods, often resulting in a two-phase phenomenon; however, the surface panel is damaged, and electrical performance is similarly affected.
Type B profiles: No two-segment phenomenon, fewer structural layers, making them more economical. Additionally, if the profile surface is damaged, there will be no impact on electrical performance.

6. Thin-film panel Metal spring clip type for the switch

Type A: Basic, commonly used construction. The fragment serves both as a tactile element and as an upper component.

Type B: Features a complex structure, suitable for applications with numerous and densely packed spring contacts that do not require jumper wires. The spring contacts are positioned on both the upper and lower circuit paths, with their conductive surfaces facing upward, necessitating the use of drilled holes. In this design, when conducting, the four legs of the spring contact do not lie in the same plane as the central point, resulting in a "two-stage" conduction phenomenon. Additionally, the spring contacts often exhibit excessive reverse curvature. Over time, this can lead to a loss of resilience, making them unsuitable for long-term use. Therefore, it is strongly recommended against employing this type.

Type C: The shrapnel is placed on the upper line, serving only as a tactile element. Its conductive surface on the upper line faces downward, while the conductive surface on the lower line faces upward. There are "two distinct scenarios," and it is recommended not to use this type.

Type D: The shrapnel is placed on the lower circuit, with traces running both above and below it. The shrapnel serves as a tactile contact point while simultaneously connecting the upper and lower circuits. This design is suitable for applications requiring a high density of shrapnel without the need for jumper wires, making it simpler than Type B. During the design process, ensure that the traces avoid the four legs of the shrapnel to prevent short circuits.

7. Emission Size: Bottom adhesive mold must be opened

The LED wiring is on the same level as the downline: This structure is simple, but if LED lights of higher height are selected, the panel will be lifted upward. In such cases, either the LED windows on the panel should be designed with a raised feature, or the adhesive layer should be thickened to ensure its thickness exceeds that of the LED lights.

The LED circuit is on a different layer from the next circuit: although the structure is complex, the LED window does not necessarily protrude upward. Instead, the upper portion of the LED must be hollowed out to ensure that light can pass through the LED aperture without obstruction. Note that during routing of the lower layer, care must be taken to avoid traces around the LED aperture.

8. Fold-over method: This type largely avoids bridging, and by eliminating the need for via holes, it allows the conductive surface to face downward. However, a drawback of this structure is that the circuitry at the fold-over point is prone to breakage.

9. Waterproofing Type of Inner and Outer Frames for Membrane Panel Switches: The outer frame is a closed design with no wiring channels, providing protection to the inner frame and preventing water vapor from entering the housing through the cable outlet grooves.