A light-emitting keyboard provided in the present invention comprises membrane switches, keycaps, scissor feet and light-emitting assemblies. Each light-emitting assembly comprises a bottom plate, an insulating layer on the bottom plate, a circuit layer located on the insulating layer and provided with a plurality of circuits, and a protective layer covering the circuits and exposing end parts of the circuits, light-emitting particles mounted on the two spaced end parts and communicated with the end parts, a layer structure arranged on the outer sides of the light-emitting particles to achieve protection and lens effects. The bottom plate, the insulating layer, the circuit layer and the protective layer form a light-emitting assembly circuit board supporting the membrane switch below. Snap joints that extend upward to pass through the membrane switch and are connected to lower edges of the scissor feet are arranged on the light-emitting assembly circuit board. The positions of the light-emitting particles correspond to the key caps. When the circuit layer is energized, the light-emitting particles emit light to illuminate the key cap, so that the light-emitting function is achieved, and the light effect is good. Because there is no need to provide holes on the bottom plate for light transmission, the strength of the bottom plate is not affected. In addition, the circuit layer, the insulating layer, the protective layer, the light-emitting particles and the layer structure can be conveniently arranged by utilizing the characteristics of high strength of the bottom plate, so that costs are low, the light and thin effect is achieved, and the heat dissipation effect is good.
H01H 13/83 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
The present disclosure provides a membrane switch, which comprises a separator provided with a first through hole, a diaphragm adhered to the upper surface and the lower surface of the separator, a pressing cavity defined by the wall of the first through hole and side surfaces opposite to the diaphragm, a conductor arranged in the pressing cavity, and a bottom plate connected to the lower surface of the lower diaphragm by an adhesive layer. The adhesive layer has a spacing groove. The upper surface of the bottom plate is provided with a recess which is recessed downwards, has a bottom wall, is arranged right below the spacing groove and is in communication with the spacing groove. The recess and the spacing groove jointly form an air channel that communicates with the outside. A waterproof air-permeable membrane is arranged in the air channel to block water vapor flow. A second through hole on the lower diaphragm is used to connect the air channel and the pressing cavity, such that the axis lines of the second through hole and the first through hole are parallel, and a circuit between the upper diaphragm and the lower diaphragm is not exposed to air in the air channel. The membrane switch is durable, can exhaust air smoothly when pressed, and provides good pressing comfort. The membrane switch is waterproof due to the presence of the waterproof air-permeable membrane, does not require accurate control of the adhesive use and the brushing position, and is easy to process.
H01H 13/86 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the casing, e.g. sealed casings or casings reducible in size
H01H 13/84 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by ergonomic functions, e.g. for miniature keyboardsSwitches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by operational sensory functions, e.g. sound feedback
H01H 13/702 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
3.
SMALL-ANGLE LIGHT-EMITTING DEVICE AND MANUFACTURING METHOD THEREFOR
Disclosed in the present invention are a small-angle light-emitting device and a manufacturing method therefor. The small-angle light-emitting device comprises a flip-chip substrate, a light-emitting chip, a light-shielding component and a filler; a conductive circuit is provided on the surface of the flip-chip substrate, the light-emitting chip is provided on the flip-chip substrate and is electrically connected to the conductive circuit by means of a conductive adhesive layer, a penetrating light guide channel is provided on the light-shielding component, the light-shielding component is attached to the flip-chip substrate and enables the light-emitting chip to be located inside the light guide channel, the filler is filled in the light guide channel, and the light-emitting device only forms a light-emitting surface at an upper channel opening of the light guide channel. The small-angle light-emitting device and the manufacturing method therefor provided in the present invention can conveniently change the light-emitting angle and the size of the light-emitting surface, are compatible with devices used in the current traditional LED production, and have a good heat dissipation effect.
An LED strip for use in a backlight module, manufacturing method thereof, and backlight module and keyboard using the same. The LED decorative strip comprises a substrate layer (1), an electrically conductive layer (2), a circuit coating layer (3), and an adhesive backing layer (4). The electrically conductive layer (2) is a sliver paste circuit layer formed by printing, and has one face including a non-solder region and several solder regions. Each of the solder regions is provided with an LED silver paste solder bump (5) protruding from the electrically conductive layer (2), and an LED lamp (6) is soldered to the LED silver paste solder bump (5). The non-solder region is covered by the circuit coating layer (3). In the LED decorative strip, a silver paste is used to form an electrically conductive layer and to provide a protruding LED silver paste solder bump, so as to increase an impedance of a loop where an LED lamp is located without adding a protective resistor connected in series, thereby reducing a manufacturing cost, simplifying the manufacturing process, and improving a product pass rate.
H01H 13/83 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
F21S 4/00 - Lighting devices or systems using a string or strip of light sources
H05K 3/34 - Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
H05K 3/12 - Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using printing techniques to apply the conductive material
H05K 1/18 - Printed circuits structurally associated with non-printed electric components
A membrane switch and a method of manufacturing the same, includes upper and lower membranes printed with upper and lower conductive dots and an isolation layer between them, holes being opened in the isolation layer corresponding to the dots, the isolation layer is bonded with the upper and lower membranes respectively via the glue coated on the upper surface and the lower surface thereof; and the glue may employ hot melt glue. This method of manufacturing the membrane switch includes a coating the upper surface and/or lower surface of the isolation layer exclusive of the positions of the holes with glue; bonding and adhering the sides of the upper membrane and the lower membrane printed with the conductive dots and respectively to the upper surface and the lower surface of the isolation layer via glue, making the positions of the conductive dots and the holes corresponding to each other.
H01H 1/10 - Laminated contacts with divided contact surface
H01H 13/704 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
H01H 13/88 - Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
A membrane switch and a manufacturing method therefor, comprising an upper-layer membrane printed with an upper conductive point, a lower-layer membrane printed with a lower conductive point and a middle isolation layer. The isolation layer is provided with holes corresponding to the locations of the upper conductive point and the lower conductive point. The isolation layer is bonded, via a glue coated on the upper and lower surfaces thereof, with the upper-layer membrane and the lower-layer membrane, wherein the glue can adopt a hot melt glue. The method for manufacturing the membrane switch comprises the steps of: (a) coating an upper surface or/and a lower surface, apart from the holes, of a selected isolation layer with the glue; and (b) respectively adhering one face of the upper-layer and lower-layer membranes printed with the conductive point and a conductive circuit, and bonding same on the isolation layer via the glue, so that the location of the conductive point corresponds to that of the hole. Coating an upper or/and a lower surface of an isolation layer with the glue can effectively overcome defects such as bubbles, transparency and starved joint caused by the traditional printing process, prevent a liquid glue from losing efficacy, and simplify the manufacturing process of a membrane switch, thereby improving the degree of automation and reducing the labor cost.
H01H 13/88 - Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
H01H 13/704 - Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
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