CN216433371U - Pressure sensor absolute pressure packaging structure - Google Patents
Pressure sensor absolute pressure packaging structure Download PDFInfo
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- CN216433371U CN216433371U CN202123176622.4U CN202123176622U CN216433371U CN 216433371 U CN216433371 U CN 216433371U CN 202123176622 U CN202123176622 U CN 202123176622U CN 216433371 U CN216433371 U CN 216433371U
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- pressure sensor
- electrical connector
- packaging structure
- rubber sealing
- sealing plug
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Abstract
The utility model discloses a pressure sensor absolute pressure packaging structure, which belongs to the technical field of sensor packaging, and comprises a pressure sensor, an electrical connector and a rubber sealing plug, wherein the electrical connector is clamped and installed inside the pressure sensor, the electrical connector is an aviation plug injection body shell from the outside, and a metal pin is fixed inside the electrical connector; the sensor packaging structure has the advantages of high-reliability vacuum sealing, simple operation and low production cost investment.
Description
Technical Field
The utility model belongs to the technical field of the sensor encapsulation, especially, relate to a pressure sensor absolute pressure packaging structure.
Background
The pressure sensor is a measuring device for converting a pressure signal into an electrical signal, and the use environment of the pressure sensor in some occasions is changed, for example, the altitude changes when the pressure sensor is used in different places, and the atmospheric pressure serving as a reference changes along with the altitude change, and if a gauge pressure sensor is adopted, the atmospheric pressure change caused by the altitude will bring measurement errors, so the pressure sensor is generally required to adopt an absolute pressure design. Due to the sealing design of the sensitive core body in the absolute pressure design, external water vapor, salt mist or dust cannot enter the core body, and the reliability of the sensor is improved.
The existing packaging of the absolute pressure sensor has the following problems: 1. the interior of the sensor needs to be vacuumized and then welded in a vacuum environment to realize vacuum sealing, but the production process is blocked, and the equipment investment is large; 2. the interior of the sensor needs to be in a vacuum state for a long time, but the sensor works in severe environments such as mechanical vibration, high and low temperature and the like for a long time, and the vacuum of the sensor is easy to leak.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pressure sensor absolute pressure packaging structure, this sensor packaging structure have the high reliable vacuum seal, and easy operation, and manufacturing cost drops into fewly.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a pressure sensor presses packaging structure absolutely, this pressure sensor presses packaging structure extremely includes pressure sensor, electrical connector, rubber sealing plug, the electrical connector joint is installed inside pressure sensor, and electrical connector is by the outside for aviation plug injection molding body shell, and inside fixed has metal pin to constitute, the inside sliding connection of electrical connector rubber sealing plug, metal pin and aviation plug still the embedment have sealed silicone between the injection molding body shell.
Furthermore, a cylinder is arranged in the middle of the rubber sealing plug, a boss and a circular truncated cone are respectively arranged at two ends of the rubber sealing plug, the outer diameter of the circular truncated cone is larger than that of the cylinder in the middle, and the end of the circular truncated cone is arranged towards the end of the metal pin.
Adopt above-mentioned scheme: the movement of the two ends of the rubber sealing plug can be limited, and the rubber sealing plug is prevented from slipping.
Furthermore, a through hole is formed in the aviation plug injection body shell, the rubber sealing plug slides, and the length of the cylinder is larger than that of the through hole.
Adopt above-mentioned scheme: the rubber sealing plug is convenient to move, and the air flow on the two sides can circulate when the rubber sealing plug moves.
The utility model has the advantages that:
1. utilize the rubber sealing plug to realize vacuum self-sealing, with traditional take out into the vacuum with sensor inside, then compare in vacuum environment welded seal's structure, this application file easy operation, production efficiency is high, and equipment drops into for a short time.
2. By using the organosilicon sealant, the problems that the gap between the metal pin of the electrical connector of the sensor and the aviation plug injection body shell is subjected to mechanical vibration to generate air leakage and the air leakage between the metal pin and the plastic part is generated after high and low temperature expansion and contraction are solved, and high-reliability vacuum sealing is realized.
Drawings
Fig. 1 is a schematic structural diagram of an absolute pressure packaging structure of a pressure sensor provided by the present invention;
fig. 2 is a schematic top view of fig. 1 illustrating an absolute pressure packaging structure of a pressure sensor according to the present invention;
fig. 3 is a cutaway view in fig. 2 of an absolute pressure packaging structure of a pressure sensor provided by the present invention.
In the figure: 1. a pressure sensor; 2. an electrical connector; 3. a rubber sealing plug; 4. an aviation plug injection body shell; 5. a metal pin; 6. organosilicon sealant; 7. and a through hole.
Detailed Description
In order to further understand the contents, features and functions of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
Referring to fig. 1 to fig. 3, the absolute pressure packaging structure of the pressure sensor according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, the pressure sensor absolute pressure packaging structure comprises a pressure sensor 1, an electrical connector 2 and a rubber sealing plug 3, wherein the electrical connector 2 is installed inside the pressure sensor 1 in a clamping manner, the electrical connector 2 is composed of an aviation plug injection molded body shell 4 arranged outside and a metal pin 5 fixed inside, the rubber sealing plug 3 is connected inside the electrical connector 2 in a sliding manner, and an organic silicon sealant 6 is further filled between the metal pin 5 and the aviation plug injection molded body shell 4.
Specifically, as shown in fig. 3, a cylinder is arranged in the middle of the rubber sealing plug 3, a boss and a circular truncated cone are respectively arranged at two ends of the rubber sealing plug, the outer diameter of the circular truncated cone is larger than that of the cylinder in the middle, and the end of the circular truncated cone is arranged towards the end of the metal pin 5, wherein a through hole 7 is formed in the aviation plug injection body shell 4 for the rubber sealing plug 3 to slide, and the length of the cylinder is larger than that of the through hole 7.
In the above embodiment, after the pressure sensor is packaged, the interior of the sensor is evacuated, and due to the air pressure difference, the rubber sealing plug 3 automatically moves upwards, the through hole 3 is an air evacuation channel, and the air in the interior is evacuated to form vacuum. After air exhaust is finished, the rubber sealing plug 3 automatically falls down due to air pressure difference, the through hole 3 is closed, and vacuum sealing is realized.
The utility model discloses a theory of operation is: firstly, through the change of air pressure difference during air exhaust, the movement of the rubber sealing plug 3 is driven to realize sealing, secondly, as the organosilicon sealant 6 has elasticity after being cured, the organosilicon sealant can closely cover the electrical connector, therefore, the organosilicon sealant 6 is also encapsulated between the metal pin 5 and the aviation plug injection molding body shell 4, the problems that the gap air leakage is generated by mechanical vibration between the metal pin of the electrical connector of the sensor and the plastic piece, and the air leakage is generated between the metal pin and the plastic piece after high and low temperature expansion and contraction are solved, and the high-reliability vacuum sealing is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a pressure sensor absolute pressure packaging structure, its characterized in that, this pressure sensor absolute pressure packaging structure includes pressure sensor (1), electrical connector (2), rubber sealing plug (3), electrical connector (2) joint is installed inside pressure sensor (1), and electrical connector (2) are by outside for aviation plug injection body shell (4), and inside is fixed with metal pin (5) and forms, and electrical connector (2) inside sliding connection rubber sealing plug (3), still the embedment has sealed silicone gum (6) between metal pin (5) and aviation plug injection body shell (4).
2. The absolute pressure packaging structure of the pressure sensor according to claim 1, wherein the rubber sealing plug (3) is a cylinder in the middle, and has a boss and a circular truncated cone at its two ends, respectively, the outer diameter of the circular truncated cone is larger than that of the cylinder in the middle, and the end of the circular truncated cone is disposed toward the end of the metal pin (5).
3. The absolute pressure packaging structure of the pressure sensor according to claim 1, wherein a through hole (7) is formed in the aviation plug injection body shell (4) for the rubber sealing plug (3) to slide, and the length of the cylinder is greater than that of the through hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123176622.4U CN216433371U (en) | 2021-12-16 | 2021-12-16 | Pressure sensor absolute pressure packaging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123176622.4U CN216433371U (en) | 2021-12-16 | 2021-12-16 | Pressure sensor absolute pressure packaging structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216433371U true CN216433371U (en) | 2022-05-03 |
Family
ID=81316902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123176622.4U Active CN216433371U (en) | 2021-12-16 | 2021-12-16 | Pressure sensor absolute pressure packaging structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216433371U (en) |
-
2021
- 2021-12-16 CN CN202123176622.4U patent/CN216433371U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An absolute pressure packaging structure for pressure sensor Effective date of registration: 20220531 Granted publication date: 20220503 Pledgee: China Construction Bank Corporation Liuyang sub branch Pledgor: HUNAN QITAI SENSING TECHNOLOGY CO.,LTD. Registration number: Y2022430000037 |