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

The invention relates to a device for regulating the tone quality and terminal equipment. The device comprises a loudspeaker and sound cavity, wherein the sound cavity comprises a fixed sound cavity and a mobile sound cavity; the loudspeaker is located in the fixed sound cavity; a side surface of the mobile sound cavity is provided with a leakage hole, the internal part of the mobile sound cavity is communicated with the external part of the device through the leakage hole, other parts, except for the leakage hole, of the sound cavities are sealed; a side, which is opposite to the leakage hole, of the mobile sound cavity is not provided with the side wall, and the side without the side wall faces toward the loudspeaker. When the volume of the sound cavity does not need to be expanded, cavity bodies of the mobile sound cavity and the fixed sound cavity are overlapped, and when the volume of the sound cavity needs to be expanded, the mobile sound cavity moves relative to the fixed sound cavity, at least part of the mobile sound cavity is located outside the fixed sound cavity. The fixed sound cavity is provided with an opening in the side wall at the moving direction of the mobile sound cavity, and the size of the opening is consistent with the outer diameter of the mobile sound cavity. The device provided by the invention increases the volume of the sound cavity through additionally arranging the mobile sound cavity, thereby improving the tone quality of sound.

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.

The invention provides a speaker box which comprises a shell made of a metal material, a sound production monomer and an annular bracket made of a plastic material, and the shell comprises a front cover and a rear cover, and the bracket comprises a bracket main body part and a bracket sound guide part extending from the bracket main body part; the sound production monomer is supported on the support and spaced from the front cover, the bracket surrounds the periphery of the sound production monomer and is hermetically fixed with the sound production monomer, the bracekt sound guide part penetrates through the shell and is at least partially exposed out of the shell, and the bracekt sound guide part is provided with a sound guide channel; the sound production monomer, the bracekt and the front cover jointly form a front vocal cavity, the sound production monomer, the bracekt, the front cover and the rear cover jointly form a rear vocal cavity, and the front vocal cavity is communicatedwith the outside through the sound guide channel. Compared with the prior art, the speaker box is large in cavity size and good in acoustic performance.

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 provides a speaker box which comprises a shell, a sound production unit and a bracket made of a plastic material, and the shell is made of a metal material and comprises an upper cover and a lower cover; the upper cover comprises an upper cover plate, an upper cover side wall, a sound outlet and a side wall extension part surrounding the sound outlet; a support comprises an annular support fixing part and a support sound guide part which are fixed on the upper cover plate, the sound production unit is supported on the support fixing part and spaced from the upper cover, the support fixing part surrounds the periphery of the sound production unit and is hermetically fixed with the sound production unit, and the sound production unit, the support and the upper cover jointly define a front sound cavity. The sound production unit, the support, the upper cover and the lower cover jointly form a rear sound cavity. The support sound guide part is provided with a sound guide channel, and the sound guide channel communicates the front sound cavity with the outside through the sound outlet; the side wall extension part is arranged around the sound guide channel and is embeddedand fixed in the support sound guide part; compared with the prior art, the speaker box is large in cavity size and good in acoustic performance.

The invention provides a loudspeaker box. The loudspeaker box comprises an upper cover, a lower cover and a single sound production unit. The lower cover and the upper cover enclose an accommodating space. The single sound production unit is arranged in the accommodating space. The lower cover comprises a top wall, a side wall and a supporting wall. The supporting wall is arranged around the single sound production unit. The accommodating space is divided into a front cavity and a rear cavity by the single sound production unit. A sound outlet hole is formed in the side wall. The lower cover further comprises a surrounding wall. The loudspeaker box further comprises a sealing assembly covering the enclosure bulkhead. A resonant cavity is defined by the surrounding wall, the supporting walland the sealing assembly. A through hole is formed in the supporting wall, the resonant cavity is communicated with the front cavity through the through hole, the sealing assembly comprises a cover plate fixed to the surrounding wall and a ventilation isolation piece arranged on the cover plate, the ventilation isolation piece and the cover plate are bonded and fixed through a glue layer, a leakage hole is formed in the sealing assembly, and the leakage hole is communicated with the rear cavity through the ventilation isolation piece. According to the loudspeaker box, the resonant cavity increases the cavity volume of the front cavity, the high-frequency acoustic performance is improved, and the leakage hole in the sealing assembly can balance the air pressure in the loudspeaker box.

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.

A stacked structure is formed such that a plurality of thin plates, which include at least one liquid flow passage thin plate provided with a liquid flow passage having a predetermined pattern formed on at least one surface, are stacked with an adhesive. A release groove for releasing the adhesive is formed on the liquid flow passage thin plate. An air release hole, which is communicated with the release groove and which penetrates in the stacking direction, is bored through a thin plate stack stacked on the liquid flow passage thin plate. An opening, which allows the air release hole to be open to the outside, is formed on the thin plate disposed at the outermost layer of the thin plate stack. The air release hole has a diameter which is larger than the width of the release groove and which is larger than the opening disposed on the outermost layer. Any excessive adhesive is accumulated in the air release hole, and it is possible to greatly decrease the amount of the adhesive outflowing to the outside of a cavity unit.

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.

A subsea well tubular member has an axial passage with upper and lower retrievable plugs releasably mounted in the passage, the plugs having ends facing each other. A cavity is formed on one of the ends of one of the plugs. A movable barrier is mounted sealingly over the cavity, the barrier being movable repeatedly between inner and outer positions in response to temperature changes. The inner position reduces a volume of the cavity and increases a volume of a trapped fluid space between the ends of the plugs. The outer position increases the volume of the cavity and decreases the volume of the trapped fluid space. The barrier has two metallic layers with different coefficients of expansion.

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.

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.

An energy storage device a first member and a second member that is slidably engaged with the first member. There are at least two seals that slidably seal the first member to the second member and define a cavity therebetween that varies in volume with relative movement between the first member and the second member. The first member is biased toward the second member in a direction that resisted increases in volume of the cavity.

The invention belongs to the technical field of square billet continuous casting production and discloses a square billet hyperbolic-type submersed nozzle and a manufacturing method thereof. The method comprises the steps including designing of a hyperbolic-type nozzle; counterboring; tool machining; machining of the hyperbolic-type nozzle; spraying and the like. According to the method, by designing the shape of an internal hyperbolic-type channel of the nozzle, by means of the characteristic that the upper curvilinear section areas are gradually decreased, the volume proportion of a cavity in the upper portion of the nozzle is controlled, and the tendency that gas suction of the nozzle causes secondary oxidation is reduced; and by means of the characteristic that the lower curvilinear section areas are gradually increased, steel flow flows downwards in a dispersed mode, the impact depth in a crystallizer of molten steel is decreased, and the flow behavior of the molten steel in the crystallizer can be improved easily. According to the square billet hyperbolic-type submersed nozzle and the manufacturing method thereof, the portion, in the hyperbolic top position, of the channel ismachined into a ring shape, backflow formed after multiple times of reducing of the steel flow is mainly used for disturbing a center flow, the flowing speed of the center flow is decreased, and thesteel flow is controlled to decelerate on the whole.

The invention provides a loudspeaker box and an assembly process thereof. The loudspeaker box comprises a sound production single body, a front cover made of a metal material, an integrally injection-molded bracket fixedly supported on the front cover, and a rear cover made of a metal material, the support comprises a support body for supporting the sound production single body and an external connection body which is connected with the support body and defines an annular through hole. The external connection body is provided with a sound guide channel penetrating through the external connection body. The rear cover covers the front cover and the outer connecting body and defines a shell with an accommodating space together with the front cover and the outer connecting body; the sound production monomer and the support body are accommodated and fixed in the accommodating space of the shell; the front cover, the support body and the sound production single body jointly enclose a front sound cavity, and the sound guide channel communicates the front sound cavity with the outside; and the sound production single body, the outer connection body, the support body and the rear cover jointly form a rear sound cavity. According to the loudspeaker box, the volume of the cavity in the shell can be increased, the volume of the rear sound cavity defined by the sound production single bodyand the shell is increased, and the acoustic performance, especially the low-frequency acoustic performance, of the loudspeaker box is improved.

The invention provides a loudspeaker box, and the box comprises a shell with an accommodating space and a sound production monomer fixedly accommodated in the accommodating space; the sound productionmonomer and the shell enclose a closed rear sound cavity, and the sound production monomer comprises a vibrating diaphragm for vibration sound production; the shell is made of a metal material, the loudspeaker box further comprises an auxiliary cavity shell which abuts against and is fixed to the outer side of the shell, the auxiliary cavity shell and the shell jointly define an auxiliary sound cavity, the shell is provided with a leakage opening penetrating through the shell, and the rear sound cavity is communicated with the auxiliary sound cavity through the leakage opening. Compared withthe prior art, the loudspeaker box is convenient to assemble, high in assembly reliability and good in sealing performance.