91results about How to "Increase cavity volume" patented technology

A sound chamber design of cell phones. The shell of the cell phone has a front sound hole, and a circuit board is in the internal space of the shell and divides the internal space into the first and the second sound chambers. A sounding device is in the first sound chamber and electrically connects the circuit board. The circuit plate has at least a sound through hole to link the first and the second sound chambers, to increase the volume of the resonance chamber of this sounding device and improve its low frequency response effect. In addition, the shell also has an attuning hole to link the first and the second sound chambers to the outside. The flattening of the resonance frequency curve of the whole cell phone improves the sound quality.

The invention provides an epitaxial structure of a laser. The epitaxial structure comprises a InP substrate, wherein a buffer layer, an N-type external limitation layer, an N-type internal limitation layer, a non-doping waveguide layer with graded refractive index, a quantum well active region, a non-doping waveguide layer with graded refractive index, a P-type internal limitation layer, a P-type external limitation layer, a corrosion blocking layer, a P-type wrapping layer, a P-type barrier gradually-changing layer, a P-type barrier abruptly-changing layer and a P-type ohmic contact layer are sequentially deposited on the InP substrate from bottom to top, wherein the pairs of quantum wells of the quantum well active region are not less than six, the quantum wells are of stress quantum well structures, wells are press stress, barriers are tension stress, the thickness of the barriers of the quantum well structures are not smaller than 10 nanometers, and the N-type internal limitation layer is a tension stress structural layer and employs a AlInAs material. By the laser, a far-field divergence angle of a semiconductor laser in a vertical direction can be reduced, and the coupling efficiency of the laser and an optical fiber is improved.

A printing form for transferring free-flowing printing ink to a printing material to be printed includes a body having a surface formed with a multiplicity of openings coverable by printing ink; a multiplicity of gas-containing cavities formed in the body, the cavities, respectively, terminating in the openings, respectively, at the surface of the body; and devices assigned to the cavities, respectively, for producing a vacuum therein for sucking printing ink covering the openings of the cavities into a region adjacent to the openings of the cavities, respectively, when a vacuum is produced by devices in the cavities, respectively; an ink transferring device including the printing form; and a method of producing the printing form.

The invention discloses a two-well horizontal connected well group retreating solution mining/cavity-building method. The method comprises the following steps of (1) drilling a straight well and an inclined well to a target stratum separately, and then drilling a horizontal wellbore to connect the straight well and the inclined well; lowering a first central pipe into the straight well, and lowering a second central pipe into the inclined well and the horizontal well; and (2) carrying out solution mining/cavity-building in a sectioned mode. During each mining/cavity-building process, fresh water flows out from the second central pipe, a salt coating layer in the affected area above the second central pipe is fully dissolved, and therefore a created cavity has a large volume, no insoluble area exists, the problem that "a middle part is insoluble" in two-well and the horizontal well solution mining/cavity-building is avoided, and the cavity is basically in the shape of a regular oblate spheroid after the completion of the entire mining/cavity-building process. The retreating cavity-building method utilizes the characteristic of the salt rock water solution that "where is injected, where is dissolved", completes the cavity-building horizontally and sectionally, effectively improves the mining rate of the salt rock, expands the volume of the dissolved cavity, specifies the shape ofthe dissolved cavity and increases the space for later use of the cavity and safety performance of the storage, and the cavity can store more various kinds of media (oil, gas, waste, etc.) safely.

The invention provides a speaker box which comprises a shell and a sound production monomer fixedly accommodated in the shell, and the sound production monomer comprises a vibrating diaphragm for vibration sound production, and the shell is made of a metal material; the shell comprises a front cover and a rear cover which respectively cover two opposite sides of the sound production monomer alongthe vibration direction of the vibrating diaphragm, an annular first bracket fixed in the shell, and a sound outlet penetrating through the shell along the direction vertical to the vibration direction of the vibrating diaphragm, and the first bracket is fixed on the front cover; the side, provided with the vibrating diaphragm, of the sound production unit is supported and fixed to the first bracket and spaced from the front cover, a front sound cavity is defined by the sound production unit, the first bracket and the front cover jointly, the front sound cavity is communicated with the outsidethrough the sound outlet to form a side sound production structure, and a rear sound cavity is defined by the sound production unit, the bracket, the front cover and the rear cover jointly. Comparedwith the prior art, the speaker box is large in cavity size and good in acoustic performance.

The invention discloses a terminal assembly for a compressor and a minisize compressor. The terminal assembly comprises a cover body and a binding post; the cover board is plate-shaped; a connecting hole is formed in the cover board; the binding post is arranged in the connecting hole, and the two ends of the binding post extend out of the connecting hole; and a bulge loop used for welding is arranged on the surface of the cover board around the connecting hole. According to the terminal assembly, the cover board can be welded on the upper shell of the compressor with a good sealing effect, so that the overall height of the compressor can be lowered conveniently.

The present disclosure provides a speaker box which comprises a shell, a support wall, a sound guiding channel, a surrounding wall and a cover plate. The speaker is fixed to support the support wall. The diaphragm of the speaker partitions the receiving space into a front sound cavity and a rear cavity, the sound guiding channel communicates the front sound cavity with the outside and forms a front cavity together with the front sound cavity, the shell, the surrounding wall, the support wall and the cover plate are jointly enclosed as an auxiliary acoustic cavity. The support wall is provided with at least two through-holes intervals, and the auxiliary acoustic cavity is communicated with the front cavity through the through-hole to form a resonant cavity structure of the front cavity. Compared with the related art, the high frequency acoustic performance of the speaker box of the present disclosure is excellent.

The invention provides a molecular sieve. Crystal framework components of the molecular sieve comprise: ZO2 and MxOy; cation components for balancing framework charges comprise: Na2O, CaO and K2O, wherein the content of each component satisfies: 96 or more percent by weight of the ZO2, 0-1 percent by weight of the MxOy, 0-1 percent by weight of the Na2O, 0-0.5 percent by weight of the CaO, and 0-1 percent by weight of the K2O. Z is one or more of Si, Ti and Ge, and M is one or more of Al, Fe, V, Zr, P and B. The molecular sieve provided by the invention is applied to an electro-acoustic device, and serves as a sound absorption material to enable an electro-acoustic device system to present better low-frequency performance: f0 of the whole molecular sieve is reduced, and a sound pressure value of a low-frequency part is increased. The invention also provides the sound absorption material for the molecular sieve and the electro-acoustic device.

A speaker box is provided in the present disclosure. The speaker box comprises a shell, a speaker, a sound guiding channel, an auxiliary sound cavity, a baffle, a cover plate and a sound absorber. The diaphragm of the speaker separates the receiving space into a front sound cavity and a rear cavity, the sound guiding channel communicates the front sound cavity with the outside. The auxiliary sound cavity is provided with the first through hole communicating with the front cavity and the second through hole communicating with the outside, and the baffle completely covers the first through hole. The baffle is provided with a channel, and the auxiliary sound cavity communicates with the front cavity through the channel. The cover plate covers the second through hole. Compared with the related art, the high frequency acoustic performance of the speaker box of the present disclosure is excellent.

The invention relates to an ostomy pouch 10. The pouch 10 includes an inner wall 18b and an outer wall 20b sealed about at least part of the periphery thereof to define a cavity for containing a stomal output. The cavity includes an upper section 12 and a lower section 14. A waisted section 13 is located between the upper section 12 and the lower section 14. A filter system is provided which includes a vent 30 in the outer wall of the pouch 10 for the release of gas from within the cavity to outside of the pouch 10; and a pre-filter arrangement comprising a protective panel 54 which defines a filter chamber 56 about the vent, and into which stomal output may enter, in use.

The invention provides a full-liquid displaying device for filling a propellant for a satellite. The full-liquid displaying device for filling the propellant for the satellite comprises an inlet, a floating ball, a cavity, a non-magnetic-conductivity stainless steel pipe, a flange, an outlet, a bolt, a connecting part, a sealing gasket and a floating ball limiting device. In light of that the traditional single-component propelling system is to be fully filled with the propellant and soaked in the propellant, the propellant flows back until reaching a specified filling volume after a liquid film is formed at a propellant management device for a storage box, the way to display whether a storage box is full of the propellant is the key of filling the propellant into the single-component propelling system, and to determine the state of filling the propellant into a single-component satellite, the full-liquid displaying device is provided to display whether the storage box is full of the propellant, and thus the full filling state of the storage box can be tested and displayed. The full-liquid displaying device for filling the propellant for the satellite has the advantages that the structure is simple, the damage is difficultly caused, the reliability is improved, the service life is prolonged, the difficulty at processing is small, the processing cost is decreased, the stainless steel materials selected for all parts are compatible with the propellant I, and meanwhile, the expansibility is improved.

An opening in a vapor barrier membrane interior to a ceiling can be sealed by a flexible enclosure. A planar member of the enclosure can be bonded to the inner side of the membrane. The enclosure is formed with a cavity that can encompass a ceiling mounted electrical device. A fastener is joined to the planar member permits bonding thereof with an interior surface of the membrane by manual application of a compressive force. The fastener may comprise a removable release liner covering an adhesive.

The invention discloses a button cell explosion-proof sealing structure, a button cell and a packaging method thereof, and relates to the technical field of cell structures. The explosion-proof sealing structure comprises a shell provided with a bottom surface and a side wall extending around the edge of the bottom surface, the edge of the upper end of the shell is connected with a cover plate in a sealed mode, the cover plate and the shell form a hollow containing cavity, and an explosion-proof hole is formed in the cover plate; an electrode plate is arranged on the outer side of the cover plate, one side of the electrode plate is integrally connected with an explosion-proof column matched with the explosion-proof hole, and the explosion-proof column extends into the containing cavity along the explosion-proof hole; and a sealing insulating layer is arranged between each of the electrode plate and the explosion-proof column and the cover plate. The sealing structure is compact in connection, the explosion-proof hole is sealed through the explosion-proof column, when the air pressure in the containing cavity is increased, the explosion-proof column is ejected out to achieve the pressure relief effect of the explosion-proof hole, and the shell is prevented from expanding and exploding; and the edge of the explosion-proof hole integrally extends in the direction of the containing cavity to form a clamping sleeve, the explosion-proof column is clamped in the clamping sleeve, a sealing insulation layer is arranged between the explosion-proof column and the inner wall of the clamping sleeve, and the sealing insulation performance is good.

Infrared radiation micro device, cover for such a device and method for its fabrication, the device comprising a substrate and a cover and an infrared radiation detecting, emitting or reflecting infrared micro unit, the infrared micro unit being arranged in a cavity defined between the substrate and the cover, the cover comprising an antireflective surface texture to enhance the transmissibility of infrared radiation, wherein a distance frame formed in an additive process on the substrate side of the cover and/or the cover side of the substrate is arranged between substrate and cover.