CN104394494A - Bluetooth loudspeaker - Google Patents
Bluetooth loudspeaker Download PDFInfo
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- CN104394494A CN104394494A CN201410747757.7A CN201410747757A CN104394494A CN 104394494 A CN104394494 A CN 104394494A CN 201410747757 A CN201410747757 A CN 201410747757A CN 104394494 A CN104394494 A CN 104394494A
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Abstract
The invention discloses a Bluetooth loudspeaker. The Bluetooth loudspeaker comprises a casing and a playing module. The playing module comprises a Bluetooth signal receiving module, a power amplification module, a power module and a loudspeaking module. The Bluetooth loudspeaker is characterized in that the casing is made of resins and comprises a base and a playing portion. A protruding water-proof platform is arranged on the base and is disposed in the casing, and a seal circuit box is arranged in a mounting groove formed in the water-proof platform. The Bluetooth signal receiving module, the power amplification module and the power module are arranged in the seal circuit box. A resin broadcasting cover is arranged on the playing portion. The loudspeaking module is fixedly connected with the resin broadcasting cover, a wire hole is formed in the circuit box, the power amplification module is connected with the loudspeaking module through a wire penetrating the wire hole, and a seal unit is arranged between the wire hole and the wire. The Bluetooth loudspeaker has the advantages of being good in whole structure water-proof effect and convenient to use; resins are high in plasticity and convenient to produce, and an outstanding tone quality effect is provided by combining the resins with a seal cavity in the casing.
Description
Technical field
The present invention relates to a kind of sound-box device, especially a kind of Baffle Box of Bluetooth.
Background technology
At present, people are when needing mobile phone or other to have the audio file in the electronic equipment of Bluetooth function in external played, the Baffle Box of Bluetooth with Bluetooth receptions module can be sent to by Bluetooth communication modules to play, use very convenient, but the waterproof effect of most Baffle Box of Bluetooth is not good, especially, when being placed on outdoor Baffle Box of Bluetooth and running into rainy, rainwater easily enters in Baffle Box of Bluetooth and damages internal circuit.
Existing Baffle Box of Bluetooth generally adopts plastics or wood materials as housing, and when making the housing of various shape, technique is comparatively complicated, waste time and energy, and overall sound quality effect is bad.
Summary of the invention
Technical problem to be solved by this invention is to provide one and has the high and manufacturing process Baffle Box of Bluetooth easily of better water resistance, acoustical quality.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of Baffle Box of Bluetooth, comprise housing and be arranged on the playing module of described enclosure interior, described playing module comprises Bluetooth signal receiver module, power amplifier module, power module and module of raising one's voice, described housing adopts resin material to make, the inside of described housing forms closed chamber, described housing comprises base and broadcasting portion, described base is provided with protruding waterproof platform, described waterproof platform is positioned at described closed chamber, in described waterproof platform, depression is provided with mounting groove, potted circuit box is provided with in described mounting groove, described Bluetooth signal receiver module, described power amplifier module and described power module are all arranged in described potted circuit box, described broadcasting portion is provided with resin broadcast lid, described raise one's voice module and the described resin inner side covered that broadcasts is fixedly connected with, described potted circuit box is provided with wire guide, described power amplifier module is by through the wire of described wire guide and described model calling of raising one's voice, sealing device is provided with between described wire guide and described wire.
Described resin material is melamine resin.
A kind of Baffle Box of Bluetooth according to claim 1, it is characterized in that described Bluetooth signal receiver module comprises the monophony bluetooth module that model is BM885SPK01, described power amplifier module comprises the D type digital power amplifier chip that model is PAM8403, first resistance, second resistance, 4th resistance, 5th resistance, 6th resistance, triode, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 7th electric capacity, 8th electric capacity, 9th electric capacity and the tenth electric capacity, described power module comprises for providing the lithium battery of 3.7V voltage and the voltage transformation module for by 3.7V voltage transitions being 3.3V voltage, described module of raising one's voice comprises the first loud speaker and the second loud speaker, 9th pin of described monophony bluetooth module, 22nd pin and the equal ground connection of the 32nd pin, the 3.3V voltage that 19th pin and the described voltage transformation module of described monophony bluetooth module produce is connected, described monophony bluetooth module the 31st pin be connected with one end of the 4th described resistance, the other end of the 4th described resistance is connected with the base stage of described triode, the collector electrode of described triode is connected with one end of the 5th described resistance and the 5th pin of described D type digital power amplifier chip respectively, the other end of the 5th described resistance is connected with the 3.7V voltage that described lithium battery produces, the grounded emitter of described triode, 4th pin of described D type digital power amplifier chip is connected with one end of the 7th described electric capacity and one end of the 8th described electric capacity respectively, the other end of the 7th described electric capacity and the equal ground connection of the other end of the 8th described electric capacity, 1st pin of described D type digital power amplifier chip is connected with the positive pole of the first described loud speaker, 3rd pin of described D type digital power amplifier chip is connected with the negative pole of the first described loud speaker, 16th pin of described D type digital power amplifier chip is connected with the positive pole of the second described loud speaker, 14th pin of described D type digital power amplifier chip is connected with the negative pole of the second described loud speaker, 2nd pin of described D type digital power amplifier chip, 9th pin, 11st pin and the equal ground connection of the 15th pin, the 3.7V voltage that 6th pin and the described lithium battery of described D type digital power amplifier chip produce is connected, 7th pin of described D type digital power amplifier chip is connected with one end of the second described resistance, the other end of the second described resistance is connected with one end of the 5th described electric capacity, the other end of the 5th described electric capacity is connected with one end of the 4th described electric capacity and the 7th pin of described monophony bluetooth module respectively, 8th pin of described D type digital power amplifier chip is connected with one end of the 3rd described electric capacity, the other end ground connection of the 3rd described electric capacity, 10th pin of described D type digital power amplifier chip is connected with one end of the first described resistance, the other end of the first described resistance is connected with the other end of the 4th described electric capacity, 12nd pin of described D type digital power amplifier chip is connected with one end of the 6th described resistance, the other end of the 6th described resistance is connected with the 3.7V voltage that described lithium battery produces, the 3.7V voltage that 13rd pin of described D type digital power amplifier chip produces with described lithium battery respectively, one end of the 9th described electric capacity and one end of the tenth described electric capacity connect, the other end of the 9th described electric capacity and the equal ground connection of the other end of the tenth described electric capacity.Employing model is that the D type digital power amplifier chip of PAM8403 not only enormously simplify circuit structure, and significantly can reduce stand-by power consumption, under the state continuing not play, battery can the continuous firing several months, the power amplification efficiency close to 100% can be reached, realize efficient electric energy to sound transformation of energy, increase useful life.
Described Bluetooth signal receiver module is provided with indicating lamp module, described indicating lamp module comprises light-emitting diode and the 3rd resistance, one end of the 3rd described resistance is connected with the 3.3V voltage that described power transfer module produces, the other end of the 3rd described resistance is connected with the positive pole of described light-emitting diode, the negative pole of described light-emitting diode is connected with the 24th pin of described monophony bluetooth module, described base is provided with the transparent lamp shade coordinated with described light-emitting diode, light-emitting diode covers in transparent lamp shade.Light-emitting diode carries out luminescence through transparent lamp shade when the circuit is operating, can in order to the state of indicating circuit work.
Described base is provided with the switch for controlling described power module break-make situation, described switch is connected with described power module by the switch connecting line through described wire guide.
Described resin broadcast covers and is provided with the waterproof coordinated with described module of raising one's voice and plays hole.The aperture that waterproof plays hole is less, has good water resistance.
The outer surface of described resin broadcast lid is from top to bottom intilted inclined-plane, and described inclined-plane and the angular range of horizontal plane are 45 ° ~ 80 °.The waterproof effect of further enhancing Baffle Box of Bluetooth.
The top in described broadcasting portion is covered with for keeping off the rain and the shade portion of waterproof.
Described shade portion is view lampshade, and the inner side of described view lampshade is provided with luminescent lamp.Increase visual aesthetic.
Compared with prior art, the invention has the advantages that Baffle Box of Bluetooth disclosed by the invention, its housing is the housing adopting resin material to make, outside rainwater or shower water cannot enter enclosure interior easily, potted circuit box itself has certain waterproof effect, the waterproof platform of the projection that base is arranged can when moisture enters enclosure interior, and protection potted circuit box is not subject to the impact of moisture further, people are when needing the audio file had in the electronic equipment of Bluetooth transmission function to play in this Baffle Box of Bluetooth, can after by the Bluetooth communication modules in electronic equipment, by audio file, the Bluetooth signal receiver module be sent in this Baffle Box of Bluetooth be changed, signal amplification is carried out through power amplifier module, finally be sent to module of raising one's voice to play, use very convenient, resin material not only plasticity is higher, the housing of various shape can be made easily, time saving and energy saving, and the acoustic characteristic of resin material is excellent, combine with the structure of housing, the acoustic characteristic of the resin material that housing adopts is excellent, combine with the closed chamber of enclosure interior, define the airtight loudspeaker box structure with outstanding acoustical quality, the audio amplifier of the low cut Property comparison other types of airtight audio amplifier is all mild, the attenuation curve of the same second-order low-pass filter of shape, this means that it has transient response best in all kinds of audio amplifier, simultaneously, the air be enclosed in audio amplifier is formed one powerful " air spring ", can effectively suppress vibrating diaphragm at the displacement at resonance frequency place, reduce nonlinear distortion.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is partial cross structure chart of the present invention;
Fig. 3 is the electrical block diagram of Bluetooth signal receiver module in the present invention;
Fig. 4 is the electrical block diagram of power amplifier module in the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one: as Fig. 1, shown in Fig. 2, a kind of Baffle Box of Bluetooth, comprise housing and be arranged on the playing module of enclosure interior, playing module comprises Bluetooth signal receiver module, power amplifier module, power module and module of raising one's voice, housing adopts melamine resin to make, the inside of housing forms closed chamber, housing comprises base 11 and broadcasting portion 12, base 11 is provided with protruding waterproof platform 2, transparent lamp shade 31 and the switch 32 for controlling power module break-make situation, waterproof platform 2 is positioned at closed chamber, in waterproof platform 2, depression is provided with mounting groove (figure does not show), potted circuit box 21 is provided with in mounting groove, Bluetooth signal receiver module, power amplifier module and power module are all arranged in potted circuit box 21, the top in broadcasting portion 12 is covered with for being kept off the rain and the shade portion of waterproof, shade portion is view lampshade 4, the inner side of view lampshade 4 is provided with luminescent lamp (figure does not show), broadcasting portion 12 is provided with resin broadcast lid 5, the outer surface of resin broadcast lid 5 is from top to bottom intilted inclined-plane, the angle of inclined-plane and horizontal plane is 80 °, the broadcast inner side of lid 5 of module of raising one's voice and resin is fixedly connected with, resin broadcast lid 5 is provided with the waterproof coordinated with module of raising one's voice and plays hole 51, potted circuit box 21 is provided with wire guide (figure does not show), power amplifier module by through wire guide wire 211 with raise one's voice model calling, switch 32 is connected with power module by the switch connecting line 33 through wire guide, sealing device (scheming not show) is provided with between wire guide and wire and switch connecting line 33, PUR can be adopted to seal between wire guide and wire 211 and switch connecting line 33 in actual installation fixing.
As Fig. 3, shown in Fig. 4, Bluetooth signal receiver module comprises the monophony bluetooth module U1 that model is BM885SPK01, monophony bluetooth module U1 is provided with indicating lamp module, power amplifier module comprises the D type digital power amplifier chip U2 that model is PAM8403, first resistance R1, second resistance R2, 4th resistance R4, 5th resistance R5, 6th resistance R6, triode Q1, 3rd electric capacity C3, 4th electric capacity C4, 5th electric capacity C5, 7th electric capacity C7, 8th electric capacity C8, 9th electric capacity C9 and the tenth electric capacity C10, power module comprises for providing the lithium battery of 3.7V voltage (figure does not show) and the voltage transformation module (figure does not show) for by 3.7V voltage transitions being 3.3V voltage, module of raising one's voice comprises the first loud speaker CN1 and the second loud speaker CN2, 9th pin of monophony bluetooth module U1, 22nd pin and the equal ground connection of the 32nd pin, the 3.3V voltage that 19th pin and the voltage transformation module of monophony bluetooth module U1 produce is connected, monophony bluetooth module U1 the 31st pin be connected with one end of the 4th resistance R4, the other end of the 4th resistance R4 is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected with one end of the 5th resistance R5 and the 5th pin of D type digital power amplifier chip U2 respectively, the 3.7V voltage that the other end and the lithium battery of the 5th resistance R5 produce is connected, the grounded emitter of triode Q1, 4th pin of D type digital power amplifier chip U2 is connected with one end of the 7th electric capacity C7 and one end of the 8th electric capacity C8 respectively, the other end of the 7th electric capacity C7 and the equal ground connection of the other end of the 8th electric capacity C8, 1st pin of D type digital power amplifier chip U2 is connected with the positive pole of the first loud speaker CN1, 3rd pin of D type digital power amplifier chip U2 is connected with the negative pole of the first loud speaker CN1, 16th pin of D type digital power amplifier chip U2 is connected with the positive pole of the second loud speaker CN2, 14th pin of D type digital power amplifier chip U2 is connected with the negative pole of the second loud speaker CN2, 2nd pin of D type digital power amplifier chip U2, 9th pin, 11st pin and the equal ground connection of the 15th pin, the 3.7V voltage that 6th pin and the lithium battery of D type digital power amplifier chip U2 produce is connected, 7th pin of D type digital power amplifier chip U2 is connected with one end of the second resistance R2, the other end of the second resistance R2 is connected with one end of the 5th electric capacity C5, the other end of the 5th electric capacity C5 is connected with one end of the 4th electric capacity C4 and the 7th pin of monophony bluetooth module U1 respectively, 8th pin of D type digital power amplifier chip U2 is connected with one end of the 3rd electric capacity C3, the other end ground connection of the 3rd electric capacity C3, 10th pin of D type digital power amplifier chip U2 is connected with one end of the first resistance R1, the other end of the first resistance R1 is connected with the other end of the 4th electric capacity C4, 12nd pin of D type digital power amplifier chip U2 is connected with one end of the 6th resistance R6, the 3.7V voltage that the other end and the lithium battery of the 6th resistance R6 produce is connected, the 3.7V voltage that 13rd pin of D type digital power amplifier chip U2 produces with lithium battery respectively, one end of 9th electric capacity C9 and one end of the tenth electric capacity C10 connect, the other end of the 9th electric capacity C9 and the equal ground connection of the other end of the tenth electric capacity C10, indicating lamp module comprises the LED and the 3rd resistance R3 that coordinate with transparent lamp shade 31, the 3.3V voltage that one end and the power transfer module of the 3rd resistance R3 produce is connected, the other end of the 3rd resistance R3 is connected with the positive pole of LED, the negative pole of LED is connected with the 24th pin of monophony bluetooth module U1, LED covers in transparent lamp shade 31.
Embodiment two: remainder is identical with embodiment one, its difference is that shade portion is rain shield, and the inclined-plane of outer surface formation and the angle of horizontal plane of resin broadcast lid 5 are 45 °.
Embodiment three: remainder is identical with embodiment one, its difference is that the angle of the inclined-plane that the outer surface of resin broadcast lid 5 is formed and horizontal plane is 65 °.
In above embodiment, this resin material of melamine resin that housing adopts, acoustic characteristic is excellent, combine with the closed chamber of enclosure interior, define the airtight loudspeaker box structure with outstanding acoustical quality, the module of raising one's voice of airtight audio amplifier is positioned at a complete airtight casing, therefore, in module of raising one's voice, the anti-phase sound wave of the vibrating diaphragm of loud speaker radiation backward is just intercepted completely by casing, can not go to outside case and go to offset with the positive sound wave in the vibrating diaphragm front of loud speaker, solve " acoustic short circuit " problem, enable bass radiation effectively; The audio amplifier of the low cut Property comparison other types of airtight audio amplifier is all mild, the attenuation curve of the same second-order low-pass filter of shape, this means that it has transient response best in all kinds of audio amplifier, simultaneously, the air be enclosed in audio amplifier is formed one powerful " air spring ", vibrating diaphragm effectively can be suppressed at the displacement at resonance frequency place, reduce nonlinear distortion.
Claims (9)
1. a Baffle Box of Bluetooth, comprise housing and be arranged on the playing module of described enclosure interior, described playing module comprises Bluetooth signal receiver module, power amplifier module, power module and module of raising one's voice, it is characterized in that described housing adopts resin material to make, the inside of described housing forms closed chamber, described housing comprises base and broadcasting portion, described base is provided with protruding waterproof platform, described waterproof platform is positioned at described closed chamber, in described waterproof platform, depression is provided with mounting groove, potted circuit box is provided with in described mounting groove, described Bluetooth signal receiver module, described power amplifier module and described power module are all arranged in described potted circuit box, described broadcasting portion is provided with resin broadcast lid, described raise one's voice module and the described resin inner side covered that broadcasts is fixedly connected with, described potted circuit box is provided with wire guide, described power amplifier module is by through the wire of described wire guide and described model calling of raising one's voice, sealing device is provided with between described wire guide and described wire.
2. a kind of Baffle Box of Bluetooth according to claim 1, is characterized in that described resin material is melamine resin.
3. a kind of Baffle Box of Bluetooth according to claim 1, it is characterized in that described Bluetooth signal receiver module comprises the monophony bluetooth module that model is BM885SPK01, described power amplifier module comprises the D type digital power amplifier chip that model is PAM8403, first resistance, second resistance, 4th resistance, 5th resistance, 6th resistance, triode, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 7th electric capacity, 8th electric capacity, 9th electric capacity and the tenth electric capacity, described power module comprises for providing the lithium battery of 3.7V voltage and the voltage transformation module for by 3.7V voltage transitions being 3.3V voltage, described module of raising one's voice comprises the first loud speaker and the second loud speaker, 9th pin of described monophony bluetooth module, 22nd pin and the equal ground connection of the 32nd pin, the 3.3V voltage that 19th pin and the described voltage transformation module of described monophony bluetooth module produce is connected, described monophony bluetooth module the 31st pin be connected with one end of the 4th described resistance, the other end of the 4th described resistance is connected with the base stage of described triode, the collector electrode of described triode is connected with one end of the 5th described resistance and the 5th pin of described D type digital power amplifier chip respectively, the other end of the 5th described resistance is connected with the 3.7V voltage that described lithium battery produces, the grounded emitter of described triode, 4th pin of described D type digital power amplifier chip is connected with one end of the 7th described electric capacity and one end of the 8th described electric capacity respectively, the other end of the 7th described electric capacity and the equal ground connection of the other end of the 8th described electric capacity, 1st pin of described D type digital power amplifier chip is connected with the positive pole of the first described loud speaker, 3rd pin of described D type digital power amplifier chip is connected with the negative pole of the first described loud speaker, 16th pin of described D type digital power amplifier chip is connected with the positive pole of the second described loud speaker, 14th pin of described D type digital power amplifier chip is connected with the negative pole of the second described loud speaker, 2nd pin of described D type digital power amplifier chip, 9th pin, 11st pin and the equal ground connection of the 15th pin, the 3.7V voltage that 6th pin and the described lithium battery of described D type digital power amplifier chip produce is connected, 7th pin of described D type digital power amplifier chip is connected with one end of the second described resistance, the other end of the second described resistance is connected with one end of the 5th described electric capacity, the other end of the 5th described electric capacity is connected with one end of the 4th described electric capacity and the 7th pin of described monophony bluetooth module respectively, 8th pin of described D type digital power amplifier chip is connected with one end of the 3rd described electric capacity, the other end ground connection of the 3rd described electric capacity, 10th pin of described D type digital power amplifier chip is connected with one end of the first described resistance, the other end of the first described resistance is connected with the other end of the 4th described electric capacity, 12nd pin of described D type digital power amplifier chip is connected with one end of the 6th described resistance, the other end of the 6th described resistance is connected with the 3.7V voltage that described lithium battery produces, the 3.7V voltage that 13rd pin of described D type digital power amplifier chip produces with described lithium battery respectively, one end of the 9th described electric capacity and one end of the tenth described electric capacity connect, the other end of the 9th described electric capacity and the equal ground connection of the other end of the tenth described electric capacity.
4. a kind of Baffle Box of Bluetooth according to claim 3, it is characterized in that described Bluetooth signal receiver module is provided with indicating lamp module, described indicating lamp module comprises light-emitting diode and the 3rd resistance, one end of the 3rd described resistance is connected with the 3.3V voltage that described power transfer module produces, the other end of the 3rd described resistance is connected with the positive pole of described light-emitting diode, the negative pole of described light-emitting diode is connected with the 24th pin of described monophony bluetooth module, described base is provided with the transparent lamp shade coordinated with described light-emitting diode, light-emitting diode covers in transparent lamp shade.
5. a kind of Baffle Box of Bluetooth according to claim 1, it is characterized in that the switch described base is provided with for controlling described power module break-make situation, described switch is connected with described power module by the switch connecting line through described wire guide.
6. a kind of Baffle Box of Bluetooth according to claim 1, is characterized in that the broadcast of described resin covers and is provided with the waterproof coordinated with described module of raising one's voice and plays hole.
7. a kind of Baffle Box of Bluetooth according to claim 1 or 6, it is characterized in that the outer surface of described resin broadcast lid is for from top to bottom intilted inclined-plane, described inclined-plane and the angular range of horizontal plane are 45 ° ~ 80 °.
8. a kind of Baffle Box of Bluetooth according to claim 1 or 6, is characterized in that the top in described broadcasting portion is covered with for keeping off the rain and the shade portion of waterproof.
9. a kind of Baffle Box of Bluetooth according to claim 8, it is characterized in that described shade portion is view lampshade, the inner side of described view lampshade is provided with luminescent lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410747757.7A CN104394494A (en) | 2014-12-09 | 2014-12-09 | Bluetooth loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410747757.7A CN104394494A (en) | 2014-12-09 | 2014-12-09 | Bluetooth loudspeaker |
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| Publication Number | Publication Date |
|---|---|
| CN104394494A true CN104394494A (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410747757.7A Pending CN104394494A (en) | 2014-12-09 | 2014-12-09 | Bluetooth loudspeaker |
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| CN (1) | CN104394494A (en) |
Cited By (3)
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| CN109448577A (en) * | 2018-10-11 | 2019-03-08 | 江苏德亚智能科技股份有限公司 | Outdoor double-sided LCD digital signage heat dissipation wind channel structure |
| CN111490812A (en) * | 2020-05-25 | 2020-08-04 | 法狮龙家居建材股份有限公司 | Bluetooth module and modular warmer with same |
| CN113978383A (en) * | 2021-11-26 | 2022-01-28 | 深圳市阿拉丁电子有限公司 | Two-way monitoring device with Bluetooth sound box for truck |
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| ISSC TECHNOLOGIES CORP: ""IS1685S-151 Application Note",http://download.csdn.net/detail/u011569514/7180855", 《IS1685S-151 APPLICATION NOTE VERSION 0.9/1.0》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448577A (en) * | 2018-10-11 | 2019-03-08 | 江苏德亚智能科技股份有限公司 | Outdoor double-sided LCD digital signage heat dissipation wind channel structure |
| CN111490812A (en) * | 2020-05-25 | 2020-08-04 | 法狮龙家居建材股份有限公司 | Bluetooth module and modular warmer with same |
| CN111490812B (en) * | 2020-05-25 | 2024-05-14 | 法狮龙家居建材股份有限公司 | Bluetooth module and modularized warmer with same |
| CN113978383A (en) * | 2021-11-26 | 2022-01-28 | 深圳市阿拉丁电子有限公司 | Two-way monitoring device with Bluetooth sound box for truck |
| CN113978383B (en) * | 2021-11-26 | 2023-08-08 | 深圳市阿拉丁电子有限公司 | Two-way monitoring of truck with Bluetooth sound box |
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Application publication date: 20150304 |
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| RJ01 | Rejection of invention patent application after publication |