6results about How to "No pressure" patented technology

The utility model relates to the field of textile fabric, especially a kind of high-strength wear-resistant fabric, including wear-resistant surface layer and antibacterial substrate layer, wear-resistant surface layer and antibacterial substrate layer between being equipped with hot melt gauze, antibacterial substrate layer is made of fiber with antibacterial function, hot melt gauze top and bottom respectively with wear-resistant surface layer and antibacterial substrate layer fixed connection, hot melt gauze is woven from hot melt fiber;Wear-resistant surface layer is woven from first fiber bundle and second fiber bundle, and the first fiber bundle includes main wear-resistant fiber as core line, and auxiliary wear-resistant fiber around core line, the weaving density of first fiber bundle in wear-resistant surface layer is 60-90 per square centimeter Root;Second fiber bundle includes main tensile fiber as core line, and auxiliary tensile fiber around core line, the weaving density of second fiber bundle in wear-resistant surface layer is 50-70 per square centimeter Root. Its solved the technical problem that existing fabric cannot consider wear resistance and tensile property.

The present disclosure provides a earpiece including an electro-acoustic transducer and a housing. The housing supports the electro-acoustic transducer such that the housing and the electro-acoustic transducer together define a first acoustic volume and a second acoustic volume. The electro-acoustic transducer is arranged such that a first radiating surface of the transducer radiates acoustic energy into the front acoustic volume and such that a second radiating surface of the transducer radiates acoustic energy into the second acoustic volume. A front port couples the first acoustic volume to a space outside of the housing, and a rear port couples the second acoustic volume to a space outside of the housing. Respective exit ends of the front port and the rear port combine before exiting the housing via a combined exit volume and exit.

This utility model relates to the field of dual dynamic driver headphone technology, aiming to solve the problems of existing push-pull dual dynamic driver headphones where a single dynamic driver unit is the main source of sound, resulting in limited dynamic range and output efficiency, and parallel dual dynamic driver headphones where the multi-cavity design leads to increased size and weight, and discomfort when worn. The present invention provides a rear-mounted dual dynamic driver headphone, including a housing, within which a first dynamic driver unit and a second dynamic driver unit are installed, arranged back-to-back. The space formed between the diaphragm side of the first dynamic driver unit and the housing is the front cavity of the first dynamic driver unit, and the space formed between the diaphragm side of the second dynamic driver unit and the housing is the front cavity of the second dynamic driver unit. The space between the two dynamic driver units is a shared rear cavity. The front cavities of the first and second dynamic driver units are connected by an acoustic channel. A sound outlet is provided on the housing, and the front cavity of the second dynamic driver unit is connected to the sound outlet. This utility model has significant improvements in sound quality, wearing comfort, and production efficiency.

The application provides a reagent for oxidatively degrading lignin and a method for efficiently removing lignin, and belongs to the technical field of degradation and conversion of agricultural and forestry biomass. The reagent for oxidatively degrading lignin provided by the application is prepared from a preparation raw material including a hydrogen peroxide solution, an alkyl acetate and a hydrolysis catalyst; the concentration of the hydrogen peroxide solution is 8-15 wt%; the volume ratio of the hydrogen peroxide solution to the alkyl acetate is 4-6:6-4; and the volume of the hydrolysis catalyst accounts for 1.0-1.5% of the total volume of the hydrogen peroxide solution and the alkyl acetate. The hydrogen peroxide solution with a concentration of 8-15 wt% is used to establish a hydrogen peroxide-alkyl acetate system, peracetic acid can be generated in situ, the reaction system is free of pressure and safety hazards during oxidation, and wood lignin can be removed with high selectivity under the condition of ≥60 DEG C.

The utility model discloses a kind of compression fixing devices for cardiac pacemaker postoperative, including back pad, the two sides of the back pad are equipped with left annular belt and right annular belt, the upper end of the back pad is connected with the one end of upper shoulder strap, the other end of the upper shoulder strap is connected with net bag, the net bag is connected with the one end of lower shoulder strap, the lower shoulder strap, left annular belt and right annular belt are connected with three item inserts respectively.The utility model newly adds a back pad in patient back position, the contact area with sickbed is increased by enlarged back pad, and the pressure of annular belt and shoulder strap to back, waist, shoulder can also be dispersed, prevent long time braking from producing blood stasis and scar, through net bag design, it can be guaranteed that fixed compression bag carries out compression to wound, and also can observe whether there is cyanosis and exuding blood etc. in surgical incision, through three item inserts, annular belt and shoulder strap are connected, avoid the problem of discomfort and inconvenient operation that multiple connection positions bring to patient.

The invention discloses a novel radioactive ray protection device, and relates to the technical field of radioactive ray protection, the novel radioactive ray protection device comprises an outer package, the inner part of the outer package is provided with a hollow part; a plurality of lead microspheres, the exterior of each lead microsphere is coated with a wear-resistant layer, and the hollow part is filled with each lead microsphere; the vacuumizing equipment is arranged on the outer package and is used for reducing gaps among the lead microspheres and fixing the shape of the outer package, the device is used for protection, the lead microspheres in the device can be adjusted in real time through a computer programmed control system, and gaps without the lead microspheres are only reserved at a scanning ray part; when a tumor patient is subjected to high-energy radioactive ray radiotherapy, the device is used for protection, the lead microspheres in the device are adjusted in real time, and only the lead microspheres at a radiotherapy radiation field part are in a vacant state; omnibearing radioactive ray protection is implemented to the maximum extent.