The metal dome touch-sensitive membrane switch

The metal dome touch-sensitive membrane switch means that the metal dome is fixed and generates a vertex on the lower circuit as the upper circuit. When the metal dome is pressed, it is connected to the other vertex of the lower circuit to form a control loop. The function keypads of the metal dome tactile membrane switch can be designed to be diversified, so that the quality of the product is more stable, and at the same time, the decorative effect of the product is improved to achieve a more exquisite appearance. The control panel can be designed as flat graphics, embossed curved surfaces, and embossed flat graphics. The shape of the membrane keypads can be designed as rings, squares, triangles, and some irregular graphics. The adhesive layer of the panel should be thickened, and there must be enough space to make the travel of the metal dome relax. If the hand feel is not good, a small gasket should be added on the back of the function keys on the control panel; the metal dome is fixed The design of the fixed layer can be divided into matching punching (the hole diameter is lower than the shrapnel) or embossing on the circuit, etc. The touch of the fixed layer punching design will make the metal dome of the button more crisp and sound, fixed The laminated flower design will be more airtight and will also affect the tactile feel of the metal dome of the key. The second structure of the metal dome tactile type is that the metal dome is directly added to the membrane buttons of the upper circuit to enhance the feel. When the number of function keys is particularly large and the overall appearance is small, there is no inner space for wiring. The structure of the left and right circuits adopts this structure, but the sensitivity of this structure is slightly weaker. The sound of the metal dome is heard but the circuit is not broken. Each design has advantages and disadvantages, which need to be determined by customer needs.

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