Membrane switch structure and type

Membrane switch structure 1) Flat type non-touch type:

Long life, but no touch;

2) Film convex touch type:

Have a good touch, but the service life is relatively short;

3) Convex frame type without touch:

Beautiful appearance, strong three-dimensional, but no touch;

4) Convex Frame Touch Type:

Appearance is beautiful, there is a strong sense of three-dimensional, and there is a sense of touch;

5) Face plate touches convex touch type:

Type (a): When the design is not proper, there are easily two phenomena, but the face plate is damaged, and the electrical function also exists;

Type (b): There is no two-stage phenomenon, and there are few structural layers and it is more economical. If the surface plate is damaged, the electrical function will not exist;

6) Metal shrapnel type:

Type (a): The most basic and commonly used structure. Shrapnel plays both the role of touch and the role of the line;

(b) type: The structure is complex, and it is used in situations where the shrapnel is more dense and there is no jumper. The shrapnel is placed on the upper line, and the upper and lower lines are all facing upwards. The upper line is punched. When this type of structure is turned on, the four legs of the shrapnel do not lie in a uniform plane with the central point, and the “two-stage” situation arises. At the same time, the shrapnel is often in a state of excessive debossing. For a long time, the shrapnel will not rebound, and it is not recommended.

(c) Type: The shrapnel is placed on the upper line, only acts as a touch, the upper line of the line is facing downwards, and the lower line is facing upwards. There is a “two-stage” situation and is not recommended;

(d) type: The shrapnel is placed on the lower line. Both the upper and lower lines have a track. The shrapnel acts as a tactile sensation and connects the upper and lower lines; it is used for more shrapnel, denser, and less hops. Lines are simpler than type (b). When designing, it is necessary to pay attention to the alignment of the circuit to avoid the four legs of the spring to ensure that there is no short circuit.

7) Luminous type: Be sure to open the bottom mold;

(a) The LED line is in the same layer as the lower line: the structure is simple, but the LED window should be convex; otherwise, the LED lamp will lift the surface plate; it is advisable to select a small number of small LED lamps or LED lamps with low height;

(b) Different layers of the LED line and the lower line: the structure is complicated, but the LED window does not have to be convex. It is advisable to use a bi-color LED lamp or a large number of LED lamps. The punching die and the bottom rubber die must be opened.

8) Folding:

This type can avoid the jumper and can not conduct the hole to make the conductive surface downward. The disadvantage of this structure is that the wire is easily broken at the fold.

9) Inner and outer frame waterproof type:

The frame is a blockade frame. It does not have any traces. It protects the inner frame and prevents moisture from entering the housing from the outlet groove.

Switch Type Flexible Membrane Switch Flexible membrane switch is a typical form of membrane switch. This type of membrane switch is called flexible because the membrane membrane layer, the isolation layer, and the circuit layer of the membrane switch are all composed of various kinds of software films.

The circuit layer of the flexible membrane switch adopts the PET with good electric function as the carrier of the switch circuit pattern. This layer also has the function of shrapnel and upper and lower circuits. Because of the properties of the polyester film, the film switch has good insulation, heat resistance, flex resistance, and high resiliency. The pattern of the switch circuit, including the switch on-line and its lead-out line, is printed using a low-resistance, low-temperature conductive coating that cures. Therefore, the composition of the entire membrane switch has a certain degree of flexibility, not only suitable for use on a planar body, but also with a curved body. The flexible membrane switch lead is integrated with the switch body itself. When the group switch is made online, it is collected at a certain part of the film, and extends outward according to the design-specified position and the line spacing of the dimension as a flexible The freely bendable and sealed lead wires are connected to the rear circuit of the complete machine.

Hard Membrane Switch Hard Membrane Switch refers to the switch's graphics and lines are made on a common printed circuit copper clad board. The hard membrane switch is characterized by the use of materials, the process is not chaotic, the resistance is low, and some components in the circuit can be directly soldered on the back side. In the case of a small area, the hard liner layer can be omitted. Hard membrane switches generally use metal guides as conductive labyrinth contacts, and therefore have a better handle. The unfavorable aspect is that it is not easy to install the flexible membrane switch in the whole machine. It is often necessary to weld the plug and lead the lead through the flat cable. Information Feedback of Hard Membrane Switch In addition to beep signals and LED indications, metal touch springs are commonly used.

The buttons on the membrane switching membrane switch indicate the position, shape, and size of the keypad in different colors, which is more common in the initial stage of the membrane switch. Three-dimensional membrane switch: In general, the keys on the membrane switch only use color to express the position, shape and size of the keypad. In this way, the correctness of the manipulation can only be recognized by the operator's visual sense, because there is no proper feedback information indicating whether the finger presses the switch in the effective range of the switch, thereby affecting the confidence of the whole machine monitoring and the speed of manipulation. A kind of open-hub slightly protruding slightly higher than the panel, forming a three-dimensional shape of the membrane switch, called the three-dimensional key switch. The three-dimensional key can not only correctly give the scope of the key body, and improve the speed of recognition, so that the operator's tactile sense is more sensitive, and at the same time it also enhances the decorative effect of the product appearance. The production of the three-dimensional key must be done in the design stage of the panel, and there is a process hole so that when the die is pressed, there is precise positioning. The height of the three-dimensional projection should not exceed twice the thickness of the substrate. For the appearance of an aesthetic product, the highlighting of the membrane switch can be varied.