3results about How to "Reduce cavity volume" patented technology

The application discloses a kind of based on pressurization method's reinforced flat plate out-of-plane bearing assembly level test test fixture and test method, test fixture includes box, clamping assembly and loading assembly;Wherein box circumferentially designs piston pump connecting port, drain port and measuring port, top circumferentially designs shoulder support by clamping assembly clamped fixed test piece. Clamping assembly is composed of frame, backing plate, pressing plate and clamp block;Wherein test piece skin circumferentially is overlapped with frame, the gap between the end of test piece bottom rib and frame is shielded by backing plate, and backing plate and skin are fixed on frame by pressing plate;Meanwhile, the end of test piece bottom rib and frame are fixed by clamp block. Loading assembly is connected in series by fatigue testing machine and piston pump, pressurized by external piston pump of box, and uniform loading is realized by using the uniform transmission characteristics of water medium static pressure. The application realizes the application of pressurization method in assembly level test, improves the accuracy of test data, and the fixture is low in manufacturing and test cost, and convenient to disassemble and assemble.

This utility model belongs to the technical field of electronic cigarette devices, and discloses a cartridge structure and a replaceable cartridge-type electronic cigarette atomizing device. The cartridge structure includes a cartridge mouthpiece, an airway sealing assembly, and an atomizing base device. The cartridge mouthpiece is detachably connected to the atomizing base device, and has a cartridge airway communicating with the atomizing base device. The airway sealing assembly is located inside the cartridge airway, extending along the entire length of the airway, and is detachably and sealingly connected to the end of the airway near the atomizing base device. This structure completely fills the airway cavity with the airway sealing assembly. Compared with the traditional method of sealing only the mouthpiece with a silicone T-shaped plug, it significantly reduces the volume of the airway cavity, reduces the flow space of e-liquid during transportation and storage, reduces the risk of e-liquid leakage due to vibration or tilting, and effectively improves the sealing performance and stability and reliability of the product under various usage conditions.

The utility model discloses a vehicle-mounted door loudspeaker module, a vehicle-mounted sound system and a vehicle, the vehicle-mounted door loudspeaker module comprises a mounting frame, a loudspeaker unit and an acoustic waveguide structure, the mounting frame is provided with a mounting plate, and the mounting plate is used for fixedly connecting the vehicle-mounted door loudspeaker module with the mounting position of a vehicle door metal plate; the main plane of the mounting plate is parallel to the plane where the mounting position is located, the loudspeaker unit is fixed in the mounting frame and comprises a vibrating diaphragm, the vibrating diaphragm and the mounting frame define a front sounding cavity, and the included angle between the axis of the loudspeaker unit and the main plane of the mounting plate is smaller than a preset angle, so that resonance between the vibration assembly and a vehicle door metal plate during vibration is avoided; and the sound waveguide structure is arranged in the sound production front cavity, so that the cavity volume of the sound production front cavity is reduced, the harmonic peak is weakened, the resonant frequency is migrated to high frequency, the overall bandwidth is expanded, the influence of the front cavity effect on the low-frequency-band sound quality is weakened, and the uniformity of low-frequency response is improved.