CN209894382U

CN209894382U - Pressure sensor

Info

Publication number: CN209894382U
Application number: CN201920775971.1U
Authority: CN
Inventors: 赵海杰; 潘俊; 董志强
Original assignee: Zhejiang Dawei Electronic Co Ltd
Current assignee: Zhejiang Dawei Electronic Co Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2020-01-03
Anticipated expiration: 2029-05-27

Abstract

The utility model discloses a pressure sensor, which comprises a housin, the casing comprises base, bottom, upper cover concatenation, the upper cover is provided with the connecting pipe, and the base is provided with the slide opening, slides in the slide opening and is provided with the slide bar, and the slide bar is provided with the magnet, is provided with the diaphragm between upper cover and the base, is provided with the spring between slide bar lower extreme and the bottom, and the elasticity compresses tightly on the diaphragm under the spring action on the slide bar, the bottom upper end is provided with inserts the cover body of establishing in the base, and this cover body is close to slide bar one side setting, and the bottom lower extreme is provided with the slot that communicates with cover internal portion, and the plug is provided with the hall subassembly. The utility model discloses simple structure, the volume is less, and processing and convenient assembling can realize the dynamic detection to pressure.

Description

Pressure sensor

Technical Field

The utility model relates to a pressure sensor of application on white small household electrical appliances.

Background

Pressure sensors are generally arranged on small white household appliances such as a traditional water purifier and a water dispenser, just as a pressure switch sensor disclosed in CN208706535U, the pressure switch sensor comprises a pressure sensing part which deforms or moves according to fluid pressure, and a movable contact and a static contact are driven to be in contact or disconnected through the pressure sensing part, so that the fluid pressure is sensed, but the pressure sensor with the structure can only detect two states of normal pressure and overpressure, cannot dynamically detect the pressure, and does not meet the requirements of modern intelligent small white household appliances.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pressure sensor, its simple structure, the volume is less, and processing and convenient assembling can realize the dynamic detection to pressure.

In order to achieve the above object, the utility model provides a pressure sensor, which comprises a housin, the casing comprises base, bottom, upper cover concatenation, the upper cover is provided with the connecting pipe, and the base is provided with the slide opening, and it is provided with the slide bar to slide in the slide opening, and the slide bar is provided with the magnet, is provided with the diaphragm between upper cover and the base, is provided with the spring between slide bar lower extreme and the bottom, and the elasticity compresses tightly on the diaphragm under the spring action slide bar upper end, the bottom upper end is provided with the cover body of inserting and establishing in the base, and this cover body is close to slide bar one side and sets up, and the bottom lower extreme is provided with the slot that communicates with cover internal portion, and.

The utility model has the advantages that: the spring can compress tightly slide bar upper end elasticity on the diaphragm, can promote the slide bar downstream when the diaphragm is deformed under the fluid pressure effect, because be provided with the magnet on the slide bar, can respond to the magnetic induction change when the magnet moves through the hall subassembly that is close to slide bar one side setting, and then can detect fluid pressure's dynamic change to the demand that accords with modern intelligent white small household electrical appliances. The utility model discloses simple structure, its casing adopt base, bottom, upper cover syllogic structure, can conveniently assemble parts such as inside slide bar, diaphragm and spring. And the setting of the cover body can be installed fixedly to the hall subassembly, and it can also play the effect isolated mutually with hall subassembly and fluid, prevents that hall subassembly from damaging.

Further, spiro union cooperation between base and the upper cover, the peripheral edge of diaphragm is fixed by base and upper cover pressure, and the middle part of diaphragm corresponds the connecting pipe setting and has deformation portion, the slide bar upper end is provided with the jack, the magnet is pegged graft and is fixed in the jack, deformation portion lower extreme is provided with the arch of pegging graft with the jack cooperation.

The technical scheme has the advantages that: the magnet can be inserted into the slide bar through the jack at the upper end of the slide bar and is fixed with the slide bar, so that the installation is more convenient. The jack also can constitute the grafting cooperation with the arch that sets up at diaphragm deformation portion lower extreme simultaneously, makes the position of deformation portion and slide bar keep fixed, makes the atress more even between the two, and then can improve the accuracy of fluid pressure detection. The base and the upper cover are in threaded connection and are convenient to disassemble and assemble.

Furthermore, a plurality of axially extending convex ribs are uniformly distributed on the circumferential wall of the inner circle of the slide hole, a plurality of side end faces and corners for connecting the side end faces are arranged at the sliding position of the slide rod matched with the slide hole, the plurality of side end faces are respectively matched with the plurality of convex ribs in a sliding manner, and the plurality of corners are respectively arranged between every two adjacent convex ribs.

The technical scheme has the advantages that: the convex ribs can form guiding sliding fit with the side end faces of the slide rod, so that linear face sliding fit is formed between the slide hole and the slide rod, friction and abrasion can be reduced, and the plurality of corners are arranged between the adjacent convex ribs and can be matched with the corners to form circumferential limit on the slide rod, so that the motion stability of the slide rod is improved.

Furthermore, the slide bar is provided with an annular flange near the lower end of the slide bar, the annular flange can form limit fit with the slide hole to prevent the slide bar from being separated upwards along the slide hole, and the upper end of the spring is sleeved at the lower end of the slide bar and forms interference fit with the annular flange.

The technical scheme has the advantages that: the setting of annular flange can prevent that the slide bar from upwards deviating from along the slide opening, can also be used for constituting the conflict cooperation between slide bar and the spring in addition, makes to keep compressing tightly the contact between slide bar and the diaphragm all the time.

Furthermore, a round hole matched and spliced with the lower end of the spring is formed in the middle of the bottom cover.

The technical scheme has the advantages that: the stability of the direction of the acting force of the spring can be ensured.

Furthermore, the Hall assembly comprises a Hall chip inserted in the slot and an electric connecting plug connected with the Hall chip through a wire, a notch is arranged at the lower end of the bottom cover, the slot is arranged in the notch, sealant is poured into the notch and the slot, and the electric connecting plug is arranged outside the shell and is connected with the Hall chip through a wire penetrating through the sealant.

The technical scheme has the advantages that: the arrangement of the sealant can encapsulate the Hall chip in the slot, and the positioning and isolating effects are achieved. The electric connection plug is arranged on the outer side of the shell, so that electric signal transmission connection of the Hall chip is facilitated.

Furthermore, the slots comprise a first slot and second slots symmetrically arranged on the inner walls of the two sides of the first slot, the second slots are matched and spliced with the two sides of the Hall chip, and an injection cavity is formed between the Hall chip and the first slot.

The technical scheme has the advantages that: the setting of second slot can supply the both sides of hall chip to correspond respectively and insert, is formed with the injecting glue chamber between hall chip and the first slot, is right when the notch carries out the injecting glue, sealed glue can flow into the injecting glue chamber and fully contact with hall chip, improves hall chip's location and isolated effect.

Furthermore, the bottom cover and the base are in anti-rotation splicing fit, and the splicing position of the bottom cover and the base is fixed through ultrasonic welding.

The technical scheme has the advantages that: avoid relative rotation when bottom and base are pegged graft mutually to can guarantee the cover body in the accuracy of base position, ultrasonic welding fixes and makes both obtain stable positioning, be difficult to break away from.

Furthermore, the end part of the connecting pipe is detachably sleeved with a dustproof cap.

The technical scheme has the advantages that: the dust cap can prevent dust, solid particles and the like from entering the pressure sensor when the pressure sensor product is just delivered from a factory, and is convenient to store for a long time.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is a cross-sectional view of an embodiment of the present invention;

FIG. 4 is a structural diagram of the bottom cover in the embodiment of the present invention;

fig. 5 is a schematic view of the installation of the bottom cover and the hall element in the embodiment of the present invention;

fig. 6 is a schematic view of the installation of the slide rod and the slide hole in the embodiment of the present invention.

Detailed Description

The embodiment of the pressure sensor of the present invention is shown in fig. 1 to 6: the device comprises a shell 1, wherein the shell 1 is formed by splicing a base 11, a bottom cover 12 and an upper cover 13, the upper cover 13 is provided with a connecting pipe 131, the connecting pipe 131 can be used for being in butt joint with a fluid pipeline to be tested, the base 11 is provided with a sliding hole 111, a sliding rod 2 is arranged in the sliding hole 111 in a sliding manner, the sliding rod 2 is provided with a magnet 3, the magnet 3 is preferably cylindrical and is arranged at the axle center of the sliding rod 2, a diaphragm 4 is arranged between the upper cover 13 and the base 11, one side of the diaphragm 4 is directly contacted with the fluid, a spring 5 is arranged between the lower end of the sliding rod 2 and the bottom cover 12, the upper end of the sliding rod 2 is elastically pressed on the diaphragm 4 under the action of the spring 5, the upper end of the bottom cover 12 is provided with a cover body 121 inserted in the base 11, the cover body 121 is arranged close to, the slot 122 is inserted with a hall assembly 6 which is matched and inducted with the magnet 3.

The base 11 and the upper cover 13 are connected in a screw connection mode, the periphery edge of the diaphragm 4 is pressed and fixed by the base 11 and the upper cover 13, namely, the peripheral edge of the diaphragm 4 is fixed between the upper cover 13 and the base 11 by pressing, the middle part of the diaphragm 4 is arranged corresponding to the connecting pipe 131 and is provided with a deformation part 41, the deformation part 41 can move up and down under the action of fluid pressure, the upper end of the slide bar 2 is provided with an insertion hole 21, the insertion hole 21 is positioned at the axis position of the slide bar 2, the magnet 3 is inserted and fixed in the insertion hole 21, the magnet 3 can be inserted and fixed in the jack 21 in an interference mode, and can also be fixed by glue, of course, the deformation portion 41 can also be directly formed by injection molding, the lower end of the deformation portion 41 is provided with a protrusion 42 which is in fit and plug-in connection with the insertion hole 21, and the protrusion 42 preferably forms an interference and plug-in connection with the insertion hole 21, so that the sliding rod 2 can keep consistent with the movement of the deformation portion 41.

A plurality of axially extending ribs 112 are uniformly distributed on the circumferential wall of the inner circle of the slide hole 111, a plurality of side end faces 22 and corners 23 connecting the plurality of side end faces 22 are arranged at the sliding part of the slide rod 2 matched with the slide hole 111, the plurality of side end faces 22 are respectively matched with the plurality of ribs 112 in a sliding way, and the plurality of corners 23 are respectively arranged between the adjacent ribs 112. The axial section of the sliding rod 2 at the sliding part matched with the sliding hole 111 is similar to a regular polygon, and the corner 23 can be an acute angle or an arc transition. In the present embodiment, the axial cross section of the sliding rod 2 is approximately square, and the corner 23 thereof is in a circular arc transition.

The sliding rod 2 is provided with an annular flange 24 near the lower end thereof, the annular flange 24 can form limit fit with the lower end of the sliding hole 111 to prevent the sliding rod 2 from being separated upwards along the sliding hole 111, and the upper end of the spring is sleeved at the lower end of the sliding rod 2 and forms interference fit with the annular flange 24.

And a round hole 123 which is matched and spliced with the lower end of the spring 5 is arranged in the middle of the bottom cover 12.

The hall assembly 6 comprises a hall chip 61 inserted in the slot 122 and an electric connecting plug 63 connected with the hall chip 61 through a wire 62, the lower end of the bottom cover 12 is provided with a notch 124, the notch 124 is circular, the slot 122 is arranged in the notch 124, sealant 7 is poured in the notch 124 and the slot 122, and the electric connecting plug 63 is arranged outside the shell 1 and connected with the hall chip 61 through the wire 62 penetrating through the sealant 7.

The slot 122 includes a first slot 1221 and second slots 1222 symmetrically disposed on inner walls of two sides of the first slot 1221, the second slots 1222 are inserted in two sides of the hall chip 61 in a matching manner, and a glue injection cavity (not labeled in the drawing) is formed between the hall chip 61 and the first slot 1221.

Prevent changeing the grafting cooperation between bottom 12 and the base 11, realize that the cooperation is prevented changeing in circumference through bump and the recess that sets up respectively on bottom 12 and base 11 in this embodiment, and both grafting department pass through ultrasonic welding fixed.

The end of the connecting pipe 131 is detachably sleeved with a dust cap 8.

When the product is assembled, the spring and the sliding rod are installed between the base and the bottom cover, the membrane is inserted into the sliding rod, the peripheral edge of the membrane is pressed and fixed between the base and the upper cover, the Hall chip of the Hall assembly is inserted into the slot of the bottom cover, and the Hall chip is packaged in the slot through glue injection in the slot and the notch. And finally, the bottom cover and the base are connected through ultrasonic welding, so that the assembly process can be completed, the integral installation structure is simpler, and the assembly is convenient.

The above examples are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims

1. A pressure sensor comprising a housing, characterized in that: the casing comprises base, bottom, upper cover concatenation, the upper cover is provided with the connecting pipe, and the base is provided with the slide opening, slides in the slide opening and is provided with the slide bar, and the slide bar is provided with the magnet, is provided with the diaphragm between upper cover and the base, is provided with the spring between slide bar lower extreme and the bottom, and the slide bar upper end elasticity compresses tightly on the diaphragm under the spring action, the bottom upper end is provided with inserts the cover body of establishing in the base, and this cover body is close to slide bar one side setting, and the bottom lower extreme is provided with the slot with the inside intercommunication of the cover body, and the plug-in slot is.

2. The pressure sensor of claim 1, wherein: spiro union cooperation between base and the upper cover, the peripheral reason of diaphragm is fixed by base and upper cover fastening, and the middle part of diaphragm corresponds the connecting pipe setting and has deformation portion, the slide bar upper end is provided with the jack, the magnet is pegged graft and is fixed in the jack, deformation portion lower extreme is provided with the arch of pegging graft with the jack cooperation.

3. The pressure sensor according to claim 1 or 2, wherein: the inner circumference wall of the sliding hole is circumferentially and uniformly provided with a plurality of axially extending convex ribs, the sliding part of the sliding rod matched with the sliding hole is provided with a plurality of side end faces and corners connected with the side end faces, the side end faces are respectively matched with the convex ribs in a sliding way, and the corners are respectively arranged between every two adjacent convex ribs.

4. The pressure sensor of claim 3, wherein: the sliding rod is provided with an annular flange close to the lower end of the sliding rod, the annular flange can form limiting fit with the sliding hole to prevent the sliding rod from being separated upwards along the sliding hole, and the upper end of the spring is sleeved at the lower end of the sliding rod and forms abutting fit with the annular flange.

5. The pressure sensor of claim 4, wherein: and a round hole which is matched and spliced with the lower end of the spring is arranged in the middle of the bottom cover.

6. The pressure sensor according to claim 1 or 5, wherein: the Hall assembly comprises a Hall chip inserted in the slot and an electric connecting plug connected with the Hall chip through a wire, a notch is arranged at the lower end of the bottom cover, the slot is arranged in the notch, sealant is poured in the notch and the slot, and the electric connecting plug is arranged outside the shell and connected with the Hall chip through a wire penetrating through the sealant.

7. The pressure sensor of claim 6, wherein: the slot comprises a first slot and second slots symmetrically arranged on the inner walls of the two sides of the first slot, the second slots are matched and spliced with the two sides of the Hall chip, and a glue injection cavity is formed between the Hall chip and the first slot.

8. The pressure sensor of claim 1 or 2 or 4 or 5 or 7, wherein: the bottom cover and the base are in anti-rotation splicing fit, and the splicing positions of the bottom cover and the base are fixed through ultrasonic welding.

9. The pressure sensor of claim 1 or 2 or 4 or 5 or 7, wherein: the dustproof cap is detachably sleeved at the end part of the connecting pipe.