CN213632523U

CN213632523U - Waterproof type baroceptor

Info

Publication number: CN213632523U
Application number: CN202022806354.9U
Authority: CN
Inventors: 王志
Original assignee: Luqin Microelectronic Technology Suzhou Co ltd
Current assignee: Luqin Microelectronic Technology Suzhou Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-07-06
Anticipated expiration: 2030-11-27

Abstract

The utility model relates to a waterproof air pressure sensor, which comprises a substrate, a sensor chip and an inner shell which are arranged on the substrate, an elastic waterproof adhesive which is arranged inside the inner shell and covers the sensor chip, and an outer shell which covers the substrate and the outer part of the inner shell; the substrate is electrically connected with the sensor chip; the outer shell comprises a lower shell for supporting the substrate and an upper shell for covering and fixing the inner shell, the lower shell and the upper shell are locked and fixed through screws, and a cavity is formed between the lower end face of the inner part of the lower shell and the lower end face of the substrate; the outer shell is arranged outside the traditional structure, so that a cavity is formed between the substrate and the outer shell, the deformation of the substrate caused by external reasons is reduced, and the influence on the detection precision of the sensor chip is further reduced; simultaneously owing to add the shell body, through the effect of shell body, realize the chucking of base plate and interior casing and fix, need not to link firmly base plate and interior casing in the assembling process, and the installation is not loaded down with trivial details.

Description

Waterproof type baroceptor

Technical Field

The utility model relates to a sensor technical field, in particular to waterproof type baroceptor.

Background

In most of the waterproof air pressure sensors at present, the interior of the sensor is filled with elastic waterproof glue, the waterproof effect can reach 50m to 100m, and the measuring range (pressure measuring range) can reach 30kPa to 150 kPa. The waterproof air pressure sensor can measure atmospheric pressure, certain water pressure and water depth.

The waterproof air pressure sensor is sometimes installed in other objects for use, but the waterproof air pressure sensor is generally directly installed on the object or placed in a sensor installation hole of the object; because the sensor is higher to the required precision, sensor chip generally installs on the base plate, and when the object received exogenic action to drive the base plate and appear micro-deformation, sensor chip's detection precision will have great error, consequently the utility model discloses developed a waterproof type baroceptor to solve the problem that exists among the prior art, through the retrieval, not discover with the utility model discloses same or similar technical scheme.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the utility model provides a waterproof type baroceptor to solve among the prior art base plate direct and installation object fixed mounting, and the problem of detection error easily appears.

The technical scheme of the utility model is that: a waterproof type air pressure sensor comprises a substrate, a sensor chip and an inner shell which are arranged on the substrate, elastic waterproof glue which is arranged in the inner shell and covers the sensor chip, and an outer shell which covers the substrate and the outer part of the inner shell; the substrate is electrically connected with the sensor chip; the shell body is including the lower casing that is used for supporting substrate and being used for covering the last casing of establishing fixed interior casing, the casing passes through screw locking fixed with last casing down, form the cavity under the internal portion of inferior valve between terminal surface and the terminal surface under the base plate.

Preferably, the inner shell is of a cylindrical structure with an upper opening and a lower opening, and the lower end part of the outer wall is provided with a pair of connecting plates; the lower shell is of a hollow structure with an opening at the upper end, a plurality of supporting tables and inserting rods which are coaxially arranged are arranged in the lower shell, the inserting rods sequentially penetrate through the substrate and the connecting plate, and the lower end face of the substrate is attached to the supporting tables; the middle part of the upper shell is provided with an installation hole for the plug bush matching of the inner shell, and the lower end part of the inner wall of the installation hole is provided with a pair of containing cavities for the nesting matching of the connecting plates; the screw axis sets up along vertical direction to run through the upper housing and extend to in the lower housing.

Preferably, the substrate and the lower shell are rectangular structures, and the support tables and the insertion rods are rectangular.

Preferably, after the upper shell and the lower shell are locked and fixed, the distance between the upper end face of the support table and the lower end face of the accommodating cavity is equal to the sum of the thicknesses of the substrate and the connecting plate.

Preferably, the length of the inserted rod along the axial direction is greater than the thickness of the substrate and less than the sum of the thicknesses of the substrate and the connecting plate.

Preferably, sealing rings are arranged between the end faces of the upper shell and the lower shell and between the inner wall of the upper shell and the outer wall of the inner shell.

Preferably, the elastic waterproof glue is uniformly filled with inorganic filler incompatible with the elastic waterproof glue.

Compared with the prior art, the utility model has the advantages that:

(1) the outer shell is arranged outside the traditional structure, so that a cavity is formed between the substrate and the outer shell, the deformation of the substrate caused by external reasons is reduced, and the influence on the detection precision of the sensor chip is further reduced; simultaneously owing to add the shell body, through the effect of shell body (go up the casing and down the casing), realize the chucking of base plate and interior casing and fix, need not to link firmly base plate and interior casing in the assembling process, the installation is not loaded down with trivial details.

(2) Because the utility model discloses have water-proof effects, not only need guarantee sensor chip's waterproof nature, still need guarantee the waterproof nature of the shell body of addding simultaneously, consequently last casing and down between the terminal surface of casing laminating, all be provided with the sealing washer between shells inner wall and the interior shells outer wall, improve structural design's rationality.

(3) The inside even packing of elasticity waterproof glue has the inorganic filler of being immiscible with elasticity waterproof glue, does not influence the mobility of elasticity waterproof glue, has increased the cohesion of elasticity waterproof glue simultaneously, has avoided the adhesion of elasticity waterproof glue high low temperature change in-process with interior casing, has reduced the stress influence of elasticity waterproof glue to the sensor chip, has promoted the stability of sensor.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is an exploded view of a waterproof type air pressure sensor according to the present invention;

fig. 2 is a cross-sectional view of a waterproof type baroceptor of the present invention.

Wherein: 1. the sensor comprises a base plate, 2, a sensor chip, 3, an inner shell, 4, elastic waterproof glue, 5, an outer shell, 6, a lower shell, 7, an upper shell, 8, a supporting table, 9, an inserting rod, 10, a cavity, 11, a connecting plate, 12, an accommodating cavity, 13, a sealing ring, 14, a mounting hole, 15 and a screw.

Detailed Description

The following detailed description is made in conjunction with specific embodiments of the present invention:

as shown in fig. 1 and 2, the waterproof type air pressure sensor includes a substrate 1, a sensor chip 2 and an inner case 3 mounted on the substrate 1, an elastic waterproof adhesive 4 provided inside the inner case 3 and covering the sensor chip 2, and an outer case 5 covering the substrate 1 and the outer side of the inner case 3.

The substrate 1 is rectangular and electrically connected to the sensor chip 2.

The inner housing 3 is a cylindrical structure with an upper and lower opening, and a pair of connecting plates 11 are provided at the lower end of the outer wall.

The outer shell 5 comprises a lower shell 6 for supporting the substrate 1 and an upper shell 7 for covering and fixing the inner shell 3, and the lower shell 6 and the upper shell 7 are locked and fixed through a screw 15; lower casing 6 is the rectangle structure, and be upper end open-ended hollow structure, inside has a plurality of supporting bench 8 and the inserted bar 9 that are the rectangle and distribute and coaxial setting, inserted bar 9 runs through base plate 1 and connecting plate 11 in proper order, terminal surface and the laminating of supporting bench 8 set up under the base plate 1, thereby realized base plate 1 and interior casing 3's location, vacuole formation 10 under the casing 6 inside this moment between terminal surface and the base plate 1 terminal surface down, reduce because outer therefore 1 deformation of base plate that arouses, and then reduce the influence to sensor chip 2 detection precision.

The middle part of the upper shell 7 is provided with a mounting hole 14 for the insertion fit of the inner shell 3, and the lower end part of the inner wall of the mounting hole 14 is provided with a pair of accommodating cavities 12 for the nesting fit of the connecting plates 11; the upper shell 7 is sleeved outside the inner shell 3 and supported on the upper end face of the lower shell 6, and the central axis of the screw 15 is arranged along the vertical direction and penetrates through the upper shell 7 to extend into the lower shell 6, so that the upper shell 7 and the lower shell 6 are locked and fixed; after the upper shell 7 and the lower shell 6 are locked and fixed, the distance between the upper end surface of the support table 8 and the lower end surface of the accommodating cavity 12 is equal to the sum of the thicknesses of the substrate 1 and the connecting plate 11, and the length of the inserted rod 9 along the axial direction is greater than the thickness of the substrate 1 and smaller than the sum of the thicknesses of the substrate 1 and the connecting plate 11, so that the substrate 1 and the inner shell 3 are clamped and fixed.

Because the utility model discloses have waterproof effect, not only need to guarantee sensor chip 2's waterproof nature, still need guarantee the waterproof nature of the shell body 5 of addding simultaneously, consequently between the terminal surface of last casing 7 and lower casing 6 laminating, all be provided with sealing washer 13 between last casing 7 inner wall and the 3 outer walls of interior casing, improve structural design's rationality.

The inside even packing of elasticity waterproof glue 4 has the inorganic filler of 4 incompatibility with elasticity waterproof glue, does not influence the mobility of elasticity waterproof glue 4, has increased elasticity waterproof glue 4's cohesion simultaneously, has avoided elasticity waterproof glue 4 high low temperature change in-process with the adhesion of interior casing 3, has reduced elasticity waterproof glue 4 to the stress influence of sensor chip 2, has promoted the stability of sensor.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. It is obvious to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention, and that the embodiments are therefore to be considered in all respects as exemplary 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.

Claims

1. A waterproof type baroceptor which characterized in that: the sensor comprises a substrate, a sensor chip and an inner shell which are arranged on the substrate, elastic waterproof glue which is arranged in the inner shell and covers the sensor chip, and an outer shell which covers the substrate and the outer part of the inner shell; the substrate is electrically connected with the sensor chip; the shell body is including the lower casing that is used for supporting substrate and being used for covering the last casing of establishing fixed interior casing, the casing passes through screw locking fixed with last casing down, form the cavity under the internal portion of inferior valve between terminal surface and the terminal surface under the base plate.

2. The waterproof type air pressure sensor according to claim 1, characterized in that: the inner shell is of a cylindrical structure with an upper opening and a lower opening, and the lower end part of the outer wall is provided with a pair of connecting plates; the lower shell is of a hollow structure with an opening at the upper end, a plurality of supporting tables and inserting rods which are coaxially arranged are arranged in the lower shell, the inserting rods sequentially penetrate through the substrate and the connecting plate, and the lower end face of the substrate is attached to the supporting tables; the middle part of the upper shell is provided with an installation hole for the plug bush matching of the inner shell, and the lower end part of the inner wall of the installation hole is provided with a pair of containing cavities for the nesting matching of the connecting plates; the screw axis sets up along vertical direction to run through the upper housing and extend to in the lower housing.

3. The waterproof type air pressure sensor according to claim 2, characterized in that: the base plate and the lower shell are of rectangular structures, and the supporting platforms and the inserting rods are distributed in a rectangular mode.

4. The waterproof type air pressure sensor according to claim 2, characterized in that: after the upper shell and the lower shell are locked and fixed, the distance between the upper end face of the supporting table and the lower end face of the containing cavity is equal to the sum of the thicknesses of the substrate and the connecting plate.

5. The waterproof type air pressure sensor according to claim 2, characterized in that: the length of the inserted rod along the axial direction is larger than the thickness of the substrate and smaller than the sum of the thicknesses of the substrate and the connecting plate.

6. The waterproof type air pressure sensor according to claim 2, characterized in that: and sealing rings are arranged between the end faces of the upper shell and the lower shell and between the inner wall of the upper shell and the outer wall of the inner shell.

7. The waterproof air pressure sensor according to any one of claims 1 to 6, wherein: and inorganic filler which is not compatible with the elastic waterproof adhesive is uniformly filled in the elastic waterproof adhesive.