CN-121994401-A - Gauge pressure sensor

CN121994401ACN 121994401 ACN121994401 ACN 121994401ACN-121994401-A

Abstract

The gauge pressure sensor comprises a shell, a pressure sensitive element, a rib plate, at least one first waterproof and breathable film and a first waterproof and breathable film, wherein an installation cavity is formed in the shell, the shell comprises a lower shell and a cover body buckled on the lower shell, the lower shell is connected with the cover body in a sealing mode, the lower shell is provided with a medium guide hole used for guiding a medium to be measured into the installation cavity, the cover body is provided with a ventilation channel communicated with the environment so as to enable the installation cavity to be communicated with the environment, the pressure sensitive element is sealed and blocked in the medium guide hole in a sealing mode to receive the pressure of the medium to be measured and generate corresponding electric signals, the rib plate is integrally formed by extending downwards from the inner surface of the cover body, one end of the inner side of the ventilation channel is communicated with the installation cavity from at least one installation surface formed on the surface of the rib plate, and the first waterproof and breathable film is correspondingly adhered to the installation surface.

Inventors

WANG XIAOPING
Cao wan
SHI TAO
Liang Nianyue
ZHU YOULI

Assignees

南京飞恩微电子有限公司

Dates

Publication Date: 20260508
Application Date: 20260204

Claims (10)

1. A gauge pressure sensor, comprising: the shell is internally provided with an installation cavity and comprises a lower shell and a cover body buckled on the lower shell, and the lower shell is in sealing connection with the cover body; the cover body is provided with a ventilation channel communicated with the environment so as to communicate the mounting cavity with the environment; The pressure sensitive element is sealed and blocked in the medium guide hole so as to receive the pressure of the medium to be detected and generate a corresponding electric signal; a rib plate formed by integrally extending downwards from the inner surface of the cover body, wherein one end of the inner side of the ventilation channel is communicated with the mounting cavity from at least one mounting surface formed on the surface of the rib plate; And at least one first waterproof and breathable film correspondingly adhered to the mounting surface.
2. The gauge pressure sensor of claim 1 wherein the inner surface of the cover extends horizontally.
3. The gauge pressure sensor of claim 1, wherein the mounting surface comprises at least one side surface of the gusset in a thickness direction.
4. The gauge pressure sensor of claim 1 wherein said mounting surface comprises two side surfaces of said web in a thickness direction.
5. The gauge pressure sensor of claim 1, wherein the mounting surface comprises two side surfaces of the gusset in a thickness direction and a lower end surface smoothly connecting them.
6. The gauge pressure sensor of claim 1 wherein the length of the gusset is along the length of the cover.
7. The gauge pressure sensor according to claim 1, wherein the rib plate is provided with open grooves penetrating through two side surfaces of the rib plate in the thickness direction, a communication port is formed in the bottom surface of the open groove, and one end of the inner side of the ventilation channel is communicated to the installation cavity through the communication port, the open groove and the first waterproof ventilation membrane in sequence.
8. The gauge pressure sensor of claim 1, further comprising an electronic module assembly, wherein the electronic module assembly comprises a circuit board, the pressure sensitive element is disposed on the circuit board and is electrically connected with the circuit board through a lead wire, and the circuit board is provided with a communication hole, so that the pressure sensitive element receives a medium to be measured through the medium guide hole.
9. The gauge pressure sensor of claim 8 wherein the lower housing includes a terminal button, a spacer is disposed between the terminal button and the mounting cavity, a terminal is disposed in the terminal button, and the terminal extends into the mounting cavity through the spacer and is electrically connected to the circuit board.
10. A gauge pressure sensor according to any one of claims 1 to 9, wherein the outer end of the waterproof and breathable channel is also provided with a second waterproof and breathable membrane, the second waterproof and breathable membrane housing is provided with a dust cover, a dust-proof gap being left between the dust cover and the outer side wall of the cover body allowing ambient pressure to reach the second waterproof and breathable membrane.

Description

Gauge pressure sensor Technical Field The invention belongs to the technical field of sensors, and particularly relates to a gauge pressure sensor. Background In the existing gauge pressure sensor, a dust cover and a waterproof breathable film are buckled on a cover body. In addition, when the breathable film filters ambient moisture while introducing ambient pressure, part of the moisture may pass through the waterproof breathable film in molecular form and then condense inside. The information disclosed in the background section of the invention is only for enhancement of understanding of the general background of the invention and is not to be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art. Disclosure of Invention The invention aims to provide a gauge pressure sensor so as to solve at least one of the technical problems. In order to achieve the above purpose, the invention adopts the following technical scheme: A gauge pressure sensor, comprising: the shell is internally provided with an installation cavity and comprises a lower shell and a cover body buckled on the lower shell, and the lower shell is in sealing connection with the cover body; the cover body is provided with a ventilation channel communicated with the environment so as to communicate the mounting cavity with the environment; The pressure sensitive element is sealed and blocked in the medium guide hole so as to receive the pressure of the medium to be detected and generate a corresponding electric signal; a rib plate formed by integrally extending downwards from the inner surface of the cover body, wherein one end of the inner side of the ventilation channel is communicated with the mounting cavity from at least one mounting surface formed on the surface of the rib plate; And at least one first waterproof and breathable film correspondingly adhered to the mounting surface. Preferably, the inner surface of the cover extends horizontally. Preferably, the mounting surface includes at least one side surface in the thickness direction of the rib plate. Preferably, the mounting surface includes both side surfaces in a thickness direction of the rib plate. Preferably, the mounting surface includes both side surfaces in the thickness direction of the rib plate and a lower end surface smoothly connecting them. Preferably, the length direction of the rib plate is set along the length direction of the cover body. Preferably, the rib plate is provided with an open slot penetrating through two side surfaces of the rib plate in the thickness direction, a communication opening is formed in the bottom surface of the open slot, and one end of the inner side of the ventilation channel is communicated to the installation cavity through the communication opening, the open slot and the first waterproof ventilation membrane in sequence. Preferably, the electronic module assembly further comprises a circuit board, the pressure sensitive element is arranged on the circuit board and is electrically connected with the circuit board through a lead wire, and the circuit board is provided with a communication hole so that the pressure sensitive element receives the medium to be measured through the medium guide hole. Preferably, the lower shell comprises a terminal button, a partition plate is arranged between the terminal button and the mounting cavity, a terminal is arranged in the terminal button, and the terminal penetrates through the partition plate to extend into the mounting cavity and is electrically connected with the circuit board. Preferably, a joint pipe is integrally connected to the lower end of the lower case, a joint hole communicating with the medium guide hole is provided in the joint pipe, and the cross-sectional area of the medium guide hole is larger than that of the joint hole. Compared with the prior art, the waterproof sensor has the advantages that the structural strength of the cover body is improved, the ventilation area of the first waterproof and breathable film can be improved, the accuracy of reference pressure is guaranteed, and therefore the measurement accuracy is improved. Drawings FIG. 1 is a schematic diagram of a pressure sensor in the present embodiment; Fig. 2 is a schematic structural view of the rib plate without the first waterproof and breathable film adhered thereto in this embodiment; fig. 3 is a schematic structural view of a first waterproof and breathable film adhered to a rib plate in the embodiment; 1, a shell, 11, a lower shell, 111, a medium guide hole, 112, a terminal button, 1121, a baffle plate, 1122, a terminal, 113, a joint pipe, 1131, a joint hole, 12, a cover body, 121, a ventilation channel, 122, an inner surface, 2, a mounting cavity, 3, a pressure sensitive element, 4, a rib plate, 41, a mounting surface, 41a, a lower end surface, 42, an open slot, 421, a communication port, 5, a first waterproof and breathable