CN116086684A

CN116086684A - Air pressure sensor for smart phone

Info

Publication number: CN116086684A
Application number: CN202310260866.5A
Authority: CN
Inventors: 张红非
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-05-09

Abstract

The invention discloses an air pressure sensor for a smart phone, which comprises a bottom plate, a protective shell and a damping spring, wherein the top of the protective pad is provided with the protective shell, the inner bottom wall of the protective shell is provided with the damping spring, the top of the damping spring is provided with a detection tube, the inner wall of the detection tube is provided with four groups of first sliding grooves, and the inner wall of each first sliding groove is provided with a telescopic button. According to the invention, the friction block and the first chute are arranged, so that the detection film can be effectively prevented from being broken due to too high or too low air pressure, when the air pressure outside is too high and exceeds the elastic range of the detection film, the friction block is not blocked by the telescopic button, the friction force between the friction block and the first chute is equal to the gravity of the detection film, the detection film drives the friction block to move in the first chute under the action of external air pressure, the movement function of the conducting rod is realized through the friction block, and the detection film is effectively prevented from being broken, so that the sensor is not operated.

Description

Air pressure sensor for smart phone

Technical Field

The invention relates to the technical field of air pressure sensors, in particular to an air pressure sensor for a smart phone.

Background

Air pressure sensor is the instrument that is used for measuring the absolute pressure of gas, and current smart mobile phone begins to be equipped with air pressure sensor mostly, and the main function is that the positioning system who makes the cell-phone is more accurate, through the collocation use with devices such as temperature sensor and collection GPS, can be accurate to about 1 meter with positioning accuracy.

The existing defects are as follows:

1. the reference CN101153826a discloses a barometric sensor, which includes a sealed housing having a sealed space formed therein, a 1 st thin plate member forming at least a part of a wall surface of the sealed housing and deformed according to a change in external barometric pressure to change a volume of the sealed space, and a first PZT contacting the 1 st thin plate member for measuring a natural frequency of vibration of the thin plate member; the sensor is always in contact with the outside air, and in a plateau or low-lying zone, the air in the plateau zone is thin, the air pressure is relatively low, and the air pressure in the low-lying zone is relatively high, so that the detection film is easily broken beyond the elastic range;

2. the comparison document CN109017424a discloses a battery air pressure sensor, and the protective claims "comprise a hard sleeve, an optical fiber, a strain gauge and a front-end horn part; the front horn part comprises a first side surface, a first large bottom surface and a first small bottom surface, wherein the first large bottom surface and the first small bottom surface are formed at two ends of the first side surface; the front-end horn part is arranged at the front end of the hard sleeve through a first small bottom surface, and the strain gauge is arranged on a first large bottom surface; the optical fiber is arranged at the rear end of the hard sleeve through the packaging component, and the hard sleeve forms a sealed cavity between the strain gauge and the packaging component; the strain gauge is provided with a reflecting surface at one side close to the sealed cavity; one end of the optical fiber is connected with the photoelectric demodulator, and the other end of the optical fiber is arranged in the sealed cavity and points to the center of the strain gauge. The method has the advantages that the internal air pressure of the battery pack can be measured by detecting the sinking degree of the strain gauge, and the strain gauge is arranged on the first large bottom surface of the horn part at the front end, so that the area of the strain gauge is larger, the sensitivity of the battery air pressure sensor is improved, but the battery air pressure sensor is lack of an anti-corrosion structure, the air pressure sensor needs to be contacted with the outside air, moisture exists in the air, a detection film is easy to erode, and a corresponding anti-corrosion structure is needed;

3. the comparison document CN112539871a discloses a digital air pressure sensor, and the protective rights "comprise a housing and a digital display screen arranged on the housing; the sensor body is arranged in the shell and comprises a terminal button, a mounting piece, a buffer component, a sensitive element assembly and a connector; the connecting head is provided with an axial vent pipe I, an air pressure sensing assembly is arranged in the vent pipe I, the air pressure sensing assembly comprises a concave deformation film and a retainer, the concave deformation film is arranged on the retainer, and a resistance strain gauge is arranged in the concave deformation film; an air inlet pipe is arranged at the upper end of the first ventilating pipe; the mounting piece is internally provided with a movable cavity, the sensitive element assembly is movably arranged in the movable cavity, and the upper end of the sensitive element assembly, which is positioned in the movable cavity, is provided with an annular clamping plate. The invention can buffer the sensitive element assembly when the air pressure is large, and can block the air inlet pipe when the air pressure exceeds the measuring range, thereby preventing the sensor from being damaged ", but the device is inconvenient to install and inflexible, and can not be adjusted according to actual conditions.

Disclosure of Invention

The invention aims to provide an air pressure sensor for a smart phone, which aims to solve the problems that a detection film is easy to break, an anti-corrosion structure is lacked and the installation is inconvenient in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the air pressure sensor for the smart phone comprises a bottom plate, a protective shell and a damping spring, wherein a protective pad is arranged at the top of the bottom plate, the protective shell is arranged at the top of the protective pad, and the damping spring is arranged at the inner bottom wall of the protective shell;

the top of the damping spring is provided with a detection tube, the inner wall of the detection tube is provided with four groups of first sliding grooves, the inner wall of each first sliding groove is provided with a telescopic button, the inner wall of the detection tube is provided with an induction resistor, and the inner wall of the induction resistor is provided with a trigger piece;

the gasket is installed at the top of bottom plate, the push rod is installed at the top of gasket, and the bottom of push rod extends into the inside of bottom plate, install the mounting tube at the top of protective housing, and the bottom of mounting tube extends into the inside of protective housing, the check valve is installed to the bottom of mounting tube.

Preferably, the dehumidification net is installed to the inner wall of installation tube, and the baffle is located the top of dehumidification net, and the heating resistor is installed to the inner wall of installation tube, and the heating resistor is located the below of dehumidification net, and the blast pipe is installed to the outer wall of installation tube, and the one end of blast pipe extends into the inside of installation tube, and the outer wall of protective housing is extended to the other end of blast pipe, the apron is installed at the top of protective housing, the clutch block is installed to the inner wall of first spout, the detection membrane is installed to the outer wall of clutch block.

Preferably, the sealing plate is installed to the inner wall of check valve, and the top of sealing plate is equipped with the air vent, and piezoceramics is installed to the inner wall of check valve, and piezoceramics is located the below of sealing plate.

Preferably, the bottom of detecting the membrane is installed the dead lever, and the outer wall cover of dead lever is equipped with the solid fixed ring, and the conducting rod is installed to the outer wall of solid fixed ring, and the outer wall of conducting rod contacts with the outer wall of induction resistor.

Preferably, the inserted bar is installed to the bottom of apron, and the outer wall of inserted bar is equipped with two sets of slots, and first spring is installed to the inner wall of installation tube, and first spring is located the top that blocks the sideboard, and the gag lever post is installed to the one end of first spring, and electrostriction pottery is installed to the bottom of inserted bar.

Preferably, the outer wall of bottom plate is equipped with the second spout, and the installation piece is installed to the inner wall of second spout, and the back of installation piece extends into the inside of bottom plate, and the back of installation piece is installed the limiting plate.

Preferably, the bottom of the pressing rod is provided with a puncture needle, the inner bottom wall of the bottom plate is provided with a rubber cover, the inner wall of the rubber cover is provided with a tough balloon, the inside of the tough balloon is filled with an adhesive, and the bottom of the bottom plate is provided with an opening.

Preferably, the working steps of the device are as follows:

s1, when a sensor is installed, a mounting block is moved to a proper position for welding, the mounting block can be flexibly adjusted so as to facilitate installation according to actual conditions, after the mounting block is welded, a pressing rod is pressed, the pressing rod moves downwards, the pressing rod drives a puncture needle to move downwards, the puncture needle punctures a rubber cover, then the puncture needle punctures a flexible balloon, adhesive in the flexible balloon flows out, the pressing rod is continuously pressed, the rubber cover is extruded by the pressing rod, all the adhesive in the flexible balloon is extruded by the rubber cover, the adhesive flows out from the bottom of an opening, a bottom plate is adhered to a circuit board of a mobile phone, the fixation of the sensor is enhanced, and the sensor is prevented from moving;

s2, when the air pressure is detected, the electrostriction ceramic is electrified, the electrostriction ceramic deforms, gaps appear between the electrostriction ceramic and the blocking plate, external air enters the mounting tube from the inside, then the air passes through the dehumidifying net, moisture in the air is adsorbed by the dehumidifying net, the piezoceramic is electrified, the piezoceramic deforms, gaps appear between the vent hole at the top of the sealing plate and the piezoceramic, the dried air enters the inside of the detecting tube, the external air pressure presses the detecting film downwards, the detecting film deforms, the detecting film drives the fixing rod to move downwards, the fixing rod drives the fixing ring to move, the fixing ring drives the conducting rod to slide on the outer wall of the sensing resistor, the positions of the conducting rod on the sensing resistor are different, the resistance values of the sensing resistor are different, and the current air pressure value can be obtained after the resistance value change of the sensing resistor is converted by the internal computing chip of the mobile phone;

s3, when the external air pressure is too large and exceeds the elastic range of the detection film, the detection film drives the conducting rod to move to the trigger piece, the trigger piece is electrified to enable the telescopic button to shrink, the friction block is not blocked by the telescopic button, the friction force between the friction block and the first sliding groove is equal to the gravity of the detection film part, and under the action of the external air pressure, the detection film drives the friction block to move in the first sliding groove, so that the movement function of the conducting rod is realized through the friction block when the external air pressure is too large or too small, and the sensor is effectively prevented from being broken and malfunctioning;

s4, outside air carries vapor, long-term contact can lead to detecting the membrane and take place to corrode, influence detection precision, after detecting, electrostriction pottery outage, piezoceramics outage, make seal between electrostriction pottery and the barrier board, seal between piezoceramics and the closing plate, start heating resistor later, heating resistor gives off heat, dry the dehumidification net, the inside moisture of dehumidification net is outwards discharged from the blast pipe, two sets of seal structure can effectually seal the inside of sensor, when not using the sensor, outside air can't enter into the inside of detecting the pipe, thereby effectually protected the detection membrane, the life of detecting the membrane has been prolonged.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the friction block and the first chute are arranged, so that the detection film can be effectively prevented from being broken due to too high or too low air pressure, when the air pressure outside is too high and exceeds the elastic range of the detection film, the detection film drives the conducting rod to move to the trigger piece, the trigger piece is electrified to enable the telescopic button to shrink, the telescopic button does not block the friction block any more, the friction force between the friction block and the first chute is equal to the gravity of the detection film part, the detection film drives the friction block to move in the first chute under the action of the external air pressure, so that the movement function of the conducting rod is realized through the friction block when the external air pressure is too high or too low, and the sensor is effectively prevented from being broken and malfunctioning;

2. according to the invention, the mounting tube, the dehumidifying net and the heating resistor are arranged, so that moisture in the sensor can be discharged, water vapor erosion is prevented, the detection film is corroded due to long-term contact of the moisture in the outside air, the detection precision is influenced, after detection is completed, the electrostrictive ceramic is powered off, the piezoelectric ceramic is powered off, so that the electrostrictive ceramic is sealed with the blocking plate, the piezoelectric ceramic is sealed with the sealing plate, then the heating resistor is started, the heating resistor emits heat to dry the dehumidifying net, the moisture in the dehumidifying net is discharged outwards from the exhaust tube, the two sealing structures can effectively seal the inside of the sensor, and when the sensor is not used, the outside air cannot enter the inside of the detection tube, so that the detection film is effectively protected, and the service life of the detection film is prolonged;

3. according to the invention, the installation block shell pressing rod is arranged to rapidly install the sensor, the installation block is moved to a proper position for welding, the installation block can be flexibly adjusted so as to facilitate installation according to actual conditions, after the installation block is welded, the pressing rod is pressed to move downwards, the pressing rod drives the puncture needle to move downwards, the puncture needle punctures the rubber cover, then the puncture needle punctures the flexible balloon, the adhesive in the flexible balloon flows out, the pressing rod is continuously pressed, the rubber cover is extruded by the pressing rod, the adhesive in the flexible balloon is completely extruded by the rubber cover, the adhesive flows out from the bottom of the opening, the bottom plate is adhered on the circuit board of the mobile phone, the fixation of the sensor is enhanced, and the sensor is prevented from moving.

Drawings

FIG. 1 is a schematic view of the appearance structure of the present invention;

FIG. 2 is a schematic view of a portion of a protective shell according to the present invention;

FIG. 3 is a schematic view of a first chute portion according to the present invention;

fig. 4 is a schematic front view of the protective shell according to the present invention;

FIG. 5 is a schematic view of a portion of a test tube according to the present invention;

FIG. 6 is a schematic top view of the base plate of the present invention;

FIG. 7 is a schematic side view of the base plate of the present invention;

fig. 8 is a schematic diagram of a portion a in fig. 4 according to the present invention.

In the figure: 1. a bottom plate; 101. a second chute; 102. a mounting block; 103. a limiting plate; 2. pressing the rod; 201. a puncture needle; 202. a rubber cover; 203. a malleable balloon; 204. opening holes; 3. a protective shell; 301. installing a pipe; 302. a dehumidifying net; 303. a heating resistor; 304. an exhaust pipe; 305. a blocking plate; 306. a protective pad; 4. a one-way valve; 401. piezoelectric ceramics; 402. a sealing plate; 5. a damping spring; 501. a detection tube; 502. a first chute; 503. a telescopic button; 504. an induction resistor; 505. a trigger piece; 6. a detection membrane; 601. a friction block; 602. a fixed rod; 603. a fixing ring; 604. a conductive rod; 7. a cover plate; 701. a rod; 702. a slot; 703. a first spring; 704. a limit rod; 705. electrostrictive ceramics.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-8, an embodiment of the present invention is provided: the utility model provides a pneumatic sensor for smart mobile phone, including bottom plate 1, protective housing 3 and damping spring 5, protection pad 306 is installed at the top of bottom plate 1, bottom plate 1 can support the device at top, realize supporting role, protection pad 306 can protect protective housing 3, realize the guard action, protective housing 3 is installed at the top of protection pad 306, protective housing 3 can protect the device in inside, play the guard action, damping spring 5 is installed to the inside diapire of protective housing 3, damping spring 5 can absorb partial vibration energy when taking place the vibrations, prevent that the internal device from damaging, realize the shock-absorbing function;

the detecting tube 501 is arranged at the top of the damping spring 5, four groups of first sliding grooves 502 are arranged on the inner wall of the detecting tube 501, the telescopic button 503 is arranged on the inner wall of the first sliding groove 502, the sensing resistor 504 is arranged on the inner wall of the detecting tube 501, the trigger piece 505 is arranged on the inner wall of the sensing resistor 504, the detecting tube 501 can be conveniently provided with the detecting film 6 so as to conveniently detect air pressure, the friction block 601 can conveniently slide through the first sliding groove 502, the telescopic button 503 can block the friction block 601 to slide, a braking function is realized, the sensing resistor 504 can conveniently slide through the conducting rod 604, the resistance value of the sensing resistor 504 is changed, the trigger piece 505 can be controlled to shrink when the external air pressure is larger than the elastic range of the detecting film 6, and the friction block 601 can move;

the gasket is installed at the top of bottom plate 1, and push rod 2 is installed at the top of gasket, and push rod 2's bottom extends into the inside of bottom plate 1, and install tube 301 is installed at the top of protective housing 3, and the bottom of installing tube 301 extends into the inside of protective housing 3, and check valve 4 is installed to the bottom of installing tube 301, and the gasket can increase the leakproofness between push rod 2 and bottom plate 1, and installing tube 301 can conveniently install apron 7, and check valve 4 can make the gas that gets into the sensor unidirectional flow to outwards exhaust air.

Further, the dehumidification net 302 is installed on the inner wall of the installation tube 301, the blocking plate 305 is located above the dehumidification net 302, the heating resistor 303 is installed on the inner wall of the installation tube 301, the heating resistor 303 is located below the dehumidification net 302, the exhaust tube 304 is installed on the outer wall of the installation tube 301, one end of the exhaust tube 304 extends into the installation tube 301, the other end of the exhaust tube 304 extends out of the outer wall of the protective shell 3, the cover plate 7 is installed on the top of the protective shell 3, the friction block 601 is installed on the inner wall of the first sliding groove 502, the detection film 6 is installed on the outer wall of the friction block 601, long-term contact can lead to corrosion of the detection film 6 due to water vapor in the outside air, detection accuracy is affected, after detection is completed, the electrostrictive ceramic 705 is powered off, the piezoceramics 401 is powered off, so that the electrostriction ceramics 705 and the blocking plate 305 are sealed, the piezoceramics 401 and the sealing plate 402 are sealed, then the heating resistor 303 is started, the heating resistor 303 emits heat to dry the dehumidification net 302, moisture in the dehumidification net 302 is discharged outwards from the exhaust pipe 304, the inside of the sensor can be effectively sealed by the two groups of sealing structures, when the sensor is not used, the outside air cannot enter the detecting tube 501, so that the detecting film 6 is effectively protected, the service life of the detecting film 6 is prolonged, the cover plate 7 can protect the top of the sensor, the protection function is realized, the friction block 601 can move in the first sliding groove 502, and the detecting film 6 can detect the outside air pressure.

Further, sealing plate 402 is installed to the inner wall of check valve 4, and the top of sealing plate 402 is equipped with the air vent, and piezoceramics 401 is installed to the inner wall of check valve 4, and piezoceramics 401 is located the below of sealing plate 402, and with piezoceramics 401 circular telegram, piezoceramics 401 takes place deformation to there is the gap between sealing plate 402 and the piezoceramics 401, and the air can follow the air vent and flow out.

Further, the dead lever 602 is installed to the bottom of detecting membrane 6, the outer wall cover of dead lever 602 is equipped with solid fixed ring 603, conducting rod 604 is installed to the outer wall of solid fixed ring 603, and the outer wall of conducting rod 604 contacts with the outer wall of induction resistor 504, outside atmospheric pressure downwardly extrusion detects membrane 6, detect membrane 6 and take place deformation, it moves down to detect membrane 6 drive dead lever 602, gu fixed ring 602 drives solid fixed ring 603 and removes, gu fixed ring 603 drives conducting rod 604 and slides on the outer wall of induction resistor 504, the position of conducting rod 604 on induction resistor 504 is different, the resistance of induction resistor 504 is different, the resistance change of induction resistor 504 can obtain current atmospheric pressure value after the conversion of cell-phone inside calculation chip.

Further, the inserted link 701 is installed to the bottom of apron 7, the outer wall of inserted link 701 is equipped with two sets of slots 702, install first spring 703 in the inner wall of installation tube 301, and first spring 703 is located the top of baffle 305, stop lever 704 is installed to one end of first spring 703, electrostrictive ceramic 705 is installed to the bottom of inserted link 701, insert the inside of installation tube 301 with the inserted link 701 of apron 7, when slot 702 passes through stop lever 704, stop lever 704 shrink, first spring 703 shrink, then when slot 702 is just to stop lever 704, first spring 703 extends, drive stop lever 704 inserts in slot 702, fix apron 7 in the inside of installation tube 301, electrostrictive ceramic 705 circular telegram takes place the deformation, the clearance appears between electrostrictive ceramic 705 and the baffle 305, the air flow is convenient.

Further, the outer wall of the bottom plate 1 is provided with a second sliding groove 101, the inner wall of the second sliding groove 101 is provided with a mounting block 102, the back surface of the mounting block 102 extends into the bottom plate 1, the back surface of the mounting block 102 is provided with a limiting plate 103, when the sensor is mounted, the mounting block 102 is moved to a proper position for welding, and the mounting block 102 can be flexibly adjusted so as to be mounted according to actual conditions.

Further, the puncture needle 201 is installed at the bottom of the pressing rod 2, the rubber cover 202 is installed on the inner bottom wall of the bottom plate 1, the flexible balloon 203 is installed on the inner wall of the rubber cover 202, the adhesive is filled in the flexible balloon 203, the opening 204 is formed in the bottom of the bottom plate 1, after the installation block 102 is welded, the pressing rod 2 is pressed, the pressing rod 2 moves downwards, the puncture needle 201 punctures the rubber cover 202, then the puncture needle 201 punctures the flexible balloon 203, the adhesive in the flexible balloon 203 flows out, the pressing rod 2 is continuously pressed, the rubber cover 202 is extruded by the rubber cover 202, the adhesive in the flexible balloon 203 flows out from the bottom of the opening 204, the bottom plate 1 is adhered to a circuit board of a mobile phone, the fixing of the sensor is enhanced, and the sensor is prevented from moving.

Further, the working steps of the device are as follows:

s1, when a sensor is installed, an installation block 102 is moved to a proper position for welding, the installation block 102 can be flexibly adjusted so as to facilitate installation according to actual conditions, after the installation block 102 is welded, a pressing rod 2 is pressed, the pressing rod 2 moves downwards, the pressing rod 2 drives a puncture needle 201 to move downwards, the puncture needle 201 punctures a rubber cover 202, then the puncture needle 201 punctures a flexible balloon 203, adhesive in the flexible balloon 203 flows out, the pressing rod 2 is continuously pressed, the pressing rod 2 extrudes the rubber cover 202, the rubber cover 202 extrudes all the adhesive in the flexible balloon 203, the adhesive flows out from the bottom of an opening 204, a bottom plate 1 is adhered to a circuit board of a mobile phone, the fixation of the sensor is enhanced, and the sensor is prevented from moving;

s2, when air pressure is detected, the electrostriction ceramic 705 is electrified, the electrostriction ceramic 705 is deformed, gaps appear between the electrostriction ceramic 705 and the blocking plate 305, external air enters the mounting tube 301 from the inside, then the air passes through the dehumidifying net 302, moisture in the air is absorbed by the dehumidifying net 302, the piezoelectric ceramic 401 is electrified, the piezoelectric ceramic 401 is deformed, gaps appear between the vent hole at the top of the sealing plate 402 and the piezoelectric ceramic 401, the dried air enters the inside of the detecting tube 501, the external air pressure downwards extrudes the detecting film 6, the detecting film 6 is deformed, the detecting film 6 drives the fixing rod 602 to downwards move, the fixing rod 602 drives the fixing ring 603 to move, the fixing ring 603 drives the conducting rod 604 to slide on the outer wall of the sensing resistor 504, the positions of the conducting rod 604 on the sensing resistor 504 are different, the resistance values of the sensing resistor 504 are different, and the current air pressure conversion value can be obtained after the resistance value of the sensing resistor 504 is changed through the internal calculation chip of the mobile phone;

s3, when the external air pressure is too large and exceeds the elastic range of the detection film 6, the detection film 6 drives the conductive rod 604 to move to the trigger piece 505, the trigger piece 505 is electrified to enable the telescopic button 503 to shrink, the telescopic button 503 does not block the friction block 601 any more, the friction force between the friction block 601 and the first sliding groove 502 is equal to the gravity of the detection film 6, under the action of the external air pressure, the detection film 6 drives the friction block 601 to move in the first sliding groove 502, and therefore when the external air pressure is too large or too small, the movement function of the conductive rod 604 is realized through the friction block 601, and the detection film 6 is effectively prevented from breaking down to cause a sensor;

s4, due to the fact that water vapor is contained in the outside air, corrosion of the detection membrane 6 can be caused by long-term contact, detection accuracy is affected, after detection is completed, the electrostriction ceramic 705 is powered off, the piezoceramic 401 is powered off, sealing between the electrostriction ceramic 705 and the blocking plate 305 is achieved, sealing between the piezoceramic 401 and the sealing plate 402 is achieved, then the heating resistor 303 is started, heat is emitted by the heating resistor 303, the dehumidification net 302 is dried, moisture in the dehumidification net 302 is discharged outwards from the exhaust pipe 304, the inside of the sensor can be effectively sealed through the two sealing structures, when the sensor is not used, the outside air cannot enter the inside of the detection tube 501, accordingly the detection membrane 6 is effectively protected, and the service life of the detection membrane 6 is prolonged.

The working principle is that when the sensor is installed, the installation block 102 is moved to a proper position for welding, the installation block 102 can be flexibly adjusted so as to facilitate the installation according to the actual situation, after the installation block 102 is welded, the pressing rod 2 is pressed, the pressing rod 2 moves downwards, the pressing rod 2 drives the puncture needle 201 to move downwards, the puncture needle 201 punctures the rubber cover 202, then the puncture needle 201 punctures the flexible balloon 203, the adhesive in the flexible balloon 203 flows out, the pressing rod 2 is continuously pressed, the rubber cover 202 is extruded by the pressing rod 2, the adhesive in the flexible balloon 203 is completely extruded by the rubber cover 202, the adhesive flows out from the bottom of the opening 204, the bottom plate 1 is adhered on the circuit board of the mobile phone, the fixation of the sensor is enhanced, the sensor is prevented from moving, the electrostrictive ceramic 705 is electrified when the air pressure is detected later, the electrostrictive ceramic 705 is deformed, gaps appear between the electrostriction ceramics 705 and the blocking plate 305, external air enters the mounting tube 301 from inside, then the air passes through the dehumidifying net 302, moisture in the air is absorbed by the dehumidifying net 302, the piezoelectric ceramics 401 is electrified, the piezoelectric ceramics 401 deform, gaps appear between the vent holes at the top of the sealing plate 402 and the piezoelectric ceramics 401, the dried air enters the inside of the detecting tube 501, external air pressure presses the detecting film 6 downwards, the detecting film 6 deforms, the detecting film 6 drives the fixing rod 602 to move downwards, the fixing rod 602 drives the fixing ring 603 to move, the fixing ring 603 drives the conducting rod 604 to slide on the outer wall of the sensing resistor 504, the positions of the conducting rod 604 on the sensing resistor 504 are different, the resistance value of the sensing resistor 504 is different, the current air pressure value can be obtained after the resistance value of the sensing resistor 504 is changed through the conversion of a computer chip inside the mobile phone, then when the external air pressure is overlarge, when the elastic range of the detection film 6 is exceeded, the detection film 6 drives the conductive rod 604 to move onto the trigger piece 505, the trigger piece 505 is electrified to enable the telescopic button 503 to shrink, the telescopic button 503 does not block the friction block 601 any more, the friction force between the friction block 601 and the first sliding groove 502 is equal to the gravity of the detection film 6, under the action of external air pressure, the detection film 6 drives the friction block 601 to move in the first sliding groove 502, so that the external air pressure can be too large or too small again, the movement function of the conductive rod 604 is realized through the friction block 601, the detection film 6 is effectively prevented from being broken, the sensor is prevented from being failed, and finally, water vapor is carried in the external air, the long-term contact can lead to detecting membrane 6 to corrode, influence the detection precision, after the detection is accomplished, electrostriction pottery 705 outage, piezoceramics 401 outage for seal between electrostriction pottery 705 and the baffle plate 305, seal between piezoceramics 401 and the closing plate 402, start heating resistor 303 later, heating resistor 303 gives off heat, dry dehumidification net 302, the inside moisture of dehumidification net 302 outwards discharges from blast pipe 304, two sets of seal structure can effectually seal the inside of sensor, when not using the sensor, outside air can't enter into the inside of detecting tube 501, thereby effectually protected detecting membrane 6, the life of detecting membrane 6 has been prolonged.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a pneumatic sensor for smart mobile phone, includes bottom plate (1), protective housing (3) and damping spring (5), its characterized in that: a protection pad (306) is arranged at the top of the bottom plate (1), a protection shell (3) is arranged at the top of the protection pad (306), and a damping spring (5) is arranged at the inner bottom wall of the protection shell (3);

the top of the damping spring (5) is provided with a detection tube (501), the inner wall of the detection tube (501) is provided with four groups of first sliding grooves (502), the inner wall of the first sliding grooves (502) is provided with a telescopic button (503), the inner wall of the detection tube (501) is provided with an induction resistor (504), and the inner wall of the induction resistor (504) is provided with a trigger piece (505);

the gasket is installed at the top of bottom plate (1), push rod (2) is installed at the top of gasket, and push rod (2)'s bottom extends into the inside of bottom plate (1), install mounting tube (301) at the top of protective housing (3), and the bottom of mounting tube (301) extends into the inside of protective housing (3), check valve (4) are installed to the bottom of mounting tube (301).

2. The air pressure sensor for a smart phone according to claim 1, wherein: the dehumidification net (302) is installed to the inner wall of installation pipe (301), and baffle (305) are located the top of dehumidification net (302), and heating resistor (303) are installed to the inner wall of installation pipe (301), and heating resistor (303) are located the below of dehumidification net (302), blast pipe (304) are installed to the outer wall of installation pipe (301), and the inside of installation pipe (301) is extended into to the one end of blast pipe (304), and the outer wall of protective housing (3) is extended to the other end of blast pipe (304), apron (7) are installed at the top of protective housing (3), friction block (601) are installed to the inner wall of first spout (502), detection membrane (6) are installed to the outer wall of friction block (601).

3. The air pressure sensor for a smart phone according to claim 1, wherein: the inner wall of check valve (4) is installed closing plate (402), and the top of closing plate (402) is equipped with the air vent, and piezoceramics (401) are installed to the inner wall of check valve (4), and piezoceramics (401) are located the below of closing plate (402).

4. The air pressure sensor for a smart phone according to claim 2, wherein: the bottom of detection membrane (6) is installed dead lever (602), and fixed ring (603) is equipped with to the outer wall cover of dead lever (602), and conducting rod (604) is installed to the outer wall of fixed ring (603), and the outer wall of conducting rod (604) contacts with the outer wall of induction resistor (504).

5. The air pressure sensor for a smart phone according to claim 2, wherein: the utility model discloses a device for fixing electrostriction ceramic, including apron (7), inserted bar (701) is installed to the bottom of apron (7), and the outer wall of inserted bar (701) is equipped with two sets of slots (702), and first spring (703) are installed to the inner wall of installation pipe (301), and first spring (703) are located the top of stopping baffle (305), and gag lever post (704) are installed to the one end of first spring (703), and electrostriction ceramic (705) is installed to the bottom of inserted bar (701).

6. The air pressure sensor for a smart phone according to claim 1, wherein: the outer wall of bottom plate (1) is equipped with second spout (101), and installation piece (102) are installed to the inner wall of second spout (101), and the inside of the back extension of installation piece (102) bottom plate (1), and limiting plate (103) are installed to the back of installation piece (102).

7. The air pressure sensor for a smart phone according to claim 1, wherein: the bottom of the pressing rod (2) is provided with a puncture needle (201), the inner bottom wall of the bottom plate (1) is provided with a rubber cover (202), the inner wall of the rubber cover (202) is provided with a flexible balloon (203), the inside of the flexible balloon (203) is filled with an adhesive, and the bottom of the bottom plate (1) is provided with an opening (204).

8. A barometric sensor for a smart phone according to any one of claims 1-7, wherein the device comprises the following working steps:

s1, when a sensor is installed, an installation block (102) is moved to a proper position for welding, the installation block (102) can be flexibly adjusted so as to facilitate installation according to actual conditions, after the installation block (102) is welded, a pressing rod (2) is pressed, the pressing rod (2) moves downwards, the pressing rod (2) drives a puncture needle (201) to move downwards, the puncture needle (201) punctures a rubber cover (202), then the puncture needle (201) punctures a flexible balloon (203), an adhesive in the flexible balloon (203) flows out, the pressing rod (2) is continuously pressed, the rubber cover (202) extrudes the adhesive in the flexible balloon (203), the adhesive flows out from the bottom of an opening (204), a bottom plate (1) is adhered to a circuit board of a mobile phone, and the sensor is prevented from moving;

s2, when air pressure is detected, electrifying the electrostriction ceramic (705), deforming the electrostriction ceramic (705), enabling a gap to appear between the electrostriction ceramic (705) and the blocking plate (305), enabling external air to enter the mounting tube (301) from inside, enabling air to pass through the dehumidifying net (302), enabling moisture in the air to be adsorbed by the dehumidifying net (302), electrifying the piezoelectric ceramic (401), enabling the piezoelectric ceramic (401) to deform, enabling gaps to appear between ventilation holes at the top of the sealing plate (402) and the piezoelectric ceramic (401), enabling the dried air to enter the inside of the detecting tube (501), enabling the external air pressure to downwards extrude the detecting film (6), enabling the detecting film (6) to deform, enabling the fixing rod (602) to drive the fixing ring (603) to move downwards, enabling the fixing ring (603) to drive the conducting rod (604) to slide on the outer wall of the sensing resistor (504), enabling the positions of the conducting rod (604) on the sensing resistor (504) to be different, enabling resistance values of the sensing resistor (504) to be converted into current air pressure values after the resistance values of the sensing resistor (504) are changed through internal calculation of a mobile phone;

s3, when the external air pressure is too large and exceeds the elastic range of the detection film (6), the detection film (6) drives the conducting rod (604) to move to the trigger piece (505), the trigger piece (505) is electrified to enable the telescopic button (503) to shrink, the telescopic button (503) does not block the friction block (601), the friction force between the friction block (601) and the first sliding groove (502) is equal to the gravity of the part of the detection film (6), under the action of the external air pressure, the detection film (6) drives the friction block (601) to move in the first sliding groove (502), so that the movement function of the conducting rod (604) is realized through the friction block (601) when the external air pressure is too large or too small, and the detection film (6) is effectively prevented from being broken, so that a sensor is failed;

s4, water vapor in the outside air can lead to corrosion of the detection membrane (6) and influence detection precision, after detection is completed, the electrostriction ceramic (705) is powered off, the piezoelectric ceramic (401) is powered off, sealing between the electrostriction ceramic (705) and the blocking plate (305) is achieved, sealing between the piezoelectric ceramic (401) and the sealing plate (402), then the heating resistor (303) is started, the heating resistor (303) emits heat, the dehumidification net (302) is dried, moisture in the dehumidification net (302) is discharged outwards from the exhaust pipe (304), the two groups of sealing structures can effectively seal the inside of the sensor, and when the sensor is not used, the outside air cannot enter the inside of the detection tube (501), so that the detection membrane (6) is effectively protected, and the service life of the detection membrane (6) is prolonged.