30results about How to "Affect electrical performance" patented technology

The invention provides a printed circuit board. The printed circuit board comprises multiple daughter boards, wherein the daughter boards comprise a first daughter board located on the outermost side of the printed circuit board; at least one first through hole is formed in the first daughter board and penetrates through back drilling surface and a compression joint surface of the first daughter board; the wall of the first through hole is plated with a conductive metal layer; a first step hole is formed in the first daughter board in a back drilling manner and is communicated with the first through hole; the projection of the first step hole on the back drilling surface of the first daughter board covers the projection of the first through hole on the back drilling surface of the first daughter board; the first step hole is separated from other holes formed in the first daughter board. The invention further provides a manufacturing method of the printed circuit board. According to the printed circuit board and the method, the step hole is formed, so that accommodation space for accommodating a fluid is formed, and the fluid can be prevented from flowing into a blind hole of the printed circuit board.

The invention discloses a detection cable and in particular relates to the cable field. The detection cable comprises a conductor core, wherein the surface of the conductor core is fixedly connected with a conductor shielding layer; the surface of the conductor shielding layer is movably connected to a stopping block and a positioning block; and the surface of the positioning block is fixedly connected with a fixing layer. The conductor core can be fixed through the stopping block and the positioning block. Thus, the conductor cores in a cable can be prevented from rotating relative to each other and further from causing the cable to fracture and affecting the electrical performance of the cable. A thermal expansion block is expanded by heat and pushes a fire extinguishing ball to make thefire extinguishing ball in a compressed state. When the cable is fired and burns out the fire extinguishing ball, the compressed fire extinguishing ball eject the carbon dioxide to extinguish the fire, thereby achieving a purpose of high temperature resistance. A first reinforcing layer and a second reinforcing layer can protect the steel wire of an outer armored layer against serious wear, thereby prolonging the service life of the cable.

The present invention provides a flat touch screen, comprising a flexible circuit board 5 and a glass substrate 1, a lower optical adhesive layer 2, a lower conductive layer 3, a double-sided adhesive 4, an upper conductive layer 6, an upper optical adhesive layer 7 and The cover plate 8; the flexible circuit board 4 is electrically connected to the lower conductive layer 3 and the upper conductive layer 6 respectively and is arranged between them; an electronic coating 9 is provided between the upper optical adhesive layer 7 and the cover plate 8, and the electronic coating Layer 9 is located right above the flexible circuit board 5 . In the present invention, by providing an electronic coating 9 between the upper optical adhesive layer 7 and the cover plate 8, the upper optical adhesive layer 7 and the cover plate 8 are isolated, so that when the flexible circuit board 3 is connected to the lower conductive layer 3 and the upper conductive layer 6 , the upper optical adhesive layer 7 is only subjected to the pulling force of the upper conductive layer 6, which avoids the generation of air bubbles between the upper conductive layer 6 and the upper optical adhesive layer 7 due to excessive tension deformation, and prevents the frequent pressing of the flexible circuit board 5 from affecting the pure Electrical performance of flat touch screens.

The invention discloses a one-way exhaust valve for a hard-shell battery, which comprises: a hollow valve body that can be installed on the battery shell of the hard-shell battery or on the top cover of the battery, the bottom end of the valve body communicates with the inside of the battery, and the valve body The top of the valve body extends out of the battery; the adsorption layer is sealed and installed in the valve body, and the adsorption layer is used to absorb the gas generated inside the battery and discharge the gas from the top of the valve body to the outside of the battery; The layer allows the gas inside the battery to exit the battery in one direction to the outside. Compared with the prior art, the one-way exhaust valve of the hard-shell battery of the present invention does not need to open the valve, and the CO generated inside the battery can be released only by the principle of adsorption and desorption. 2 , CO, CH 4 Such small molecular gases are discharged to the outside, and the exhaust operation is simple and has ideal sealing performance, which can significantly improve the service life and safety performance of hard-shell batteries. In addition, the invention also discloses a hard shell battery.

The invention relates to a lamp and a heat dissipation mechanism thereof. The heat dissipation mechanism is used for dissipating heat generated by lamp beads and comprises a substrate, heat dissipation pieces, connecting columns and insulating blocks; the substrate is composed of a substrate body and thermal conductive layers; the thermal conductive layers are arranged on the outer wall of the substrate body, and the lamp beads are arranged on the thermal conductive layers respectively; each connecting column has the thermal conductivity and is arranged between the substrate body and the corresponding heat dissipation piece; and each insulating block has the thermal conductivity and is arranged between the substrate body and the corresponding heat dissipation piece to enable insulation to exist between each thermal conductive layer and the corresponding heat dissipation piece. According to the lamp and the heat dissipation mechanism thereof, heat generated by the lamp beads sequentially passes through the thermal conductive layers, the connecting columns, the insulating blocks and the heat dissipation pieces, or the heat generated by the lamp beads sequentially passes through the thermal conductive layers, the connecting column, the insulating blocks, the connecting column and the heat dissipation pieces, so that the problem of lower thermal conduction efficiency of a car lamp is solved, and the service life of the car lamp can be prolonged.

The invention provides a printed circuit board. The printed circuit board comprises a plurality of sub board bodies. The sub board bodies comprise the first sub board body and the second sub board body. A first medium layer is arranged between the first sub board body and the second sub board body. The first sub board body is located on the outmost side of the printed circuit board. The first surface of the first medium layer is in press fit with the pressing face of the first sub board body, and the second surface is in press fit with the second sub board body. The part, protruding out of the first surface, of a first guide connection column covers hole openings of via holes of the first sub board body. The part, protruding out of the second surface, of the first guide connection column covers hole openings of via holes of the second sub board body so that a conductive metal layer of the via holes of the first sub board body can be electrically connected with a conductive meal layer of the via holes of the second sub board body in a breakover mode through the first guide connection column. The invention provides a printed circuit board manufacturing method.