6results about How to "Reduce sag" patented technology

The invention discloses a circuit board preparation method. The circuit board preparation method comprises the following steps: respectively processing through holes in positions, corresponding to copper bosses or embedded parts, in a copper-clad core plate and a prepreg; laminating and hot-pressing the copper-clad core plate, the prepreg and the metal radiating plate or the embedded part provided with the copper boss, wherein one part of the prepreg is hot-pressed to form a bonding part for connecting the side wall of the copper boss or the embedded part with the copper-clad core plate; grinding the plate to reduce the concave depth of the bonding part relative to the plate surface; plating copper on the whole board to manufacture a surface copper foil layer on the surface of the circuit board; grinding the plate so as to further improve the surface flatness of the surface copper foil layer; wherein the copper-clad core plate located on the outermost side during laminated plate hot pressing comprises an outer-layer copper foil and an inner-layer copper foil, and the thickness of the outer-layer copper foil is smaller than that of the inner-layer copper foil, so that the initial concave depth of the bonding part is reduced. According to the preparation method, the surface flatness of the copper foil layer on the surface of the circuit board can be improved, and the product yield is improved.

The present application relates to an antenna structure and a preparation method, the antenna structure includes a coupled first radiation unit and a second radiation unit, the first radiation unit includes a first radiation part arranged vertically and extending along a first direction, a first groove is formed on the first radiation part, the second radiation unit includes a second radiation part arranged vertically and formed with a second groove, the second radiation part and the first radiation part are arranged side by side and spaced in a second direction, the second direction intersects the first direction, the upper area of ​​the first radiation part and the upper area of ​​the second radiation part are bent toward each other to form a bending part, the first radiation unit and the second radiation unit are staggered in the first direction, so that the first groove and the second groove are staggered, and the bending part of the first radiation unit is staggered with the bending part of the second radiation unit. The antenna structure is optimized so that the antenna can achieve 360-degree omnidirectional signal reception; and the existence of the bending part reduces the volume of the antenna structure.

The utility model provides an under-line construction protection device for a high-voltage line, which relates to the technical field of building construction safety protection and comprises a plurality of mounting seats, the mounting seats are uniformly mounted on the ground according to a construction area, and telescopic rods are mounted at one ends, deviating from the ground, of the mounting seats. A pulley block is arranged at the end, away from the mounting base, of the telescopic rod, a traction rope is inserted into the pulley block, the end, away from the pulley block, of the traction rope is connected with the mounting base, the pulley block is connected with a connecting rope, and the end, away from the pulley block, of the connecting rope is connected with a protective net. According to a construction area, the mounting seats are uniformly mounted, so that the mounting seats are located at the edge of the construction area, and the protective net is lifted to a certain height through the telescopic rods and the pulley blocks arranged on the mounting seats to cover the construction area, so that the construction area is covered by the protective net; the protective net enables various mechanical devices used for construction not to be in direct contact with the high-voltage line, and reduces the damage caused by the contact of constructors with the high-voltage line in the construction process.

The application discloses a PCB conveying system and a PCB conveying method. The PCB conveying system comprises a conveying module and a supporting plate module. The conveying module is arranged along a preset conveying path and is used for conveying a PCB. Two groups of inclined conveying surfaces are formed on the conveying module. The two groups of conveying surfaces are arranged on two sides in the width direction of the conveying path, and the lower sides of the two groups of conveying surfaces are close to each other. The supporting plate module is arranged along the conveying path. The two groups of conveying surfaces can support the PCB at two edges in the width direction of the conveying path, thereby reducing the contact area between the conveying surface and the PCB, and reducing the damage of the board surface of the PCB in the conveying process. The supporting plate module can support the middle part of the PCB without friction with the board surface of the PCB, so that the PCB conveying system can convey the PCB with a relatively small thickness.

The utility model relates to a novel energy-saving environment-friendly high-speed flat wire enameling machine, and belongs to the technical field of production of enamelled flat wires. According to the technical scheme, the flat wire enters a second painting mechanism from a second cooling section upper channel, the lower portion of the flat wire is painted through the second painting mechanism, then the flat wire enters an internal wiring channel of an oven mechanism, penetrates out of a first cooling section lower channel, is reversed through a first reversing guide wheel after penetrating out, and then enters a first cooling section upper channel; after entering the painting mechanism I from the cooling section upper channel I to paint the upper surface of the flat wire, the flat wire enters a wiring channel in the oven mechanism, then penetrates out through the cooling section lower channel II, is reversed by the reversing guide wheel II after penetrating out and then enters the next cooling section upper channel II, and multi-pass painting is carried out circularly. According to the utility model, the uniformity of the thickness of paint films on the upper and lower surfaces of the flat wire is ensured, and meanwhile, waste gas released by the flat wire after being painted, solidified and cooled can be effectively absorbed.

This invention provides a door assembly structure and vehicle, belonging to the field of automotive door technology. It includes an inner door panel and an outer door panel, with an outer panel reinforcing plate, an outer panel support plate, a door anti-collision beam, and a door lock reinforcing plate disposed between the inner and outer door panels. The outer panel reinforcing plate, outer panel support plate, and door anti-collision beam are arranged sequentially from top to bottom. The door assembly structure provided by this invention utilizes a first force transmission channel and a second force transmission channel to transmit the impact force of a side impact on the door assembly to the vehicle body, reducing the degree of inward indentation of the door, ensuring door strength, improving its rigidity, and achieving improved NVH performance. The structure is arranged in three directions (X, Y, and Z) to ensure that the structure can transmit force in each direction. The triangular adhesive area forms an adhesive fixation for the outer door panel, significantly improving the stability of the outer door panel installation.