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CN-122002734-A - Sealing structure

CN122002734ACN 122002734 ACN122002734 ACN 122002734ACN-122002734-A

Abstract

The disclosure discloses a sealing structure, which comprises a first shell and a second shell, wherein the first shell comprises a convex upper connecting wall, the second shell can be buckled with the first shell and jointly surrounds and defines an annular sealing cavity, the second shell is provided with a lower connecting wall, and/or the upper connecting wall and/or the lower connecting wall are/is provided with an exhaust groove communicated with the annular sealing cavity, the exhaust groove is communicated with the outside in the buckling process of the first shell and the second shell, and after the buckling is completed, the exhaust groove is closed by sealant arranged between the upper connecting wall and the lower connecting wall. According to the sealing structure disclosed by the embodiment of the invention, the gas in the annular sealing cavity can be rapidly discharged in the sealing assembly process, the internal and external air pressure balance of the sealed cavity is improved, the breakage of a rubber line or the sealing failure caused by trapped gas is fundamentally avoided, meanwhile, an extra hole is not required in the appearance of the product, and the integrity and consistency of the appearance of the product are ensured.

Inventors

  • MA YIMING
  • HUI SHUN
  • LI NING

Assignees

  • 天津九安医疗电子股份有限公司

Dates

Publication Date
20260508
Application Date
20260313

Claims (13)

  1. 1. A sealing structure, characterized by comprising: a first housing (10) comprising a raised upper connecting wall; A second housing (20) which can be snapped with the first housing (10) and which together enclose an annular sealing chamber (110), the second housing (20) having a lower connecting wall, and An exhaust groove (23) communicated with the annular sealing cavity (110) is formed in the upper connecting wall and/or the lower connecting wall; In the buckling process of the first shell (10) and the second shell (20), the exhaust groove (23) is communicated with the outside, and after the buckling is completed, the exhaust groove (23) is closed by sealant arranged between the upper connecting wall and the lower connecting wall.
  2. 2. The sealing structure according to claim 1, characterized in that the radially inner side of the upper connecting wall is provided with a through hole (12) penetrating the first housing (10), the upper connecting wall comprises an annular sealing wall (11) arranged adjacent to the through hole (12), and the lower connecting wall comprises an annular sealing edge (21) buckled with the annular sealing wall (11).
  3. 3. The sealing structure according to claim 2, characterized in that a sealing glue is filled between the annular sealing wall (11) and the annular sealing edge (21), and in the process of the buckling of the first shell (10) and the second shell (20), the sealing glue is synchronously extruded into the air exhaust groove (23), and after sealing, gaps between the air exhaust groove (23) and the annular sealing edge (21) and the annular sealing wall (11) are completely sealed.
  4. 4. A sealing arrangement according to claim 3, characterized in that the second housing (20) comprises a bottom shell (25) and a middle shell (26) fixedly connected to each other, the annular sealing rim (21) being provided to the middle shell (26).
  5. 5. The sealing structure according to claim 4, characterized in that a sealant is filled between the bottom shell (25) and the middle shell (26), and a sensor groove (261) of the middle shell (26) communicating with the annular sealing cavity (110) is provided on the middle shell (26).
  6. 6. The sealing arrangement according to claim 2, characterized in that the upper connecting wall further comprises an annular outer sealing wall (17) radially outwardly of the annular sealing wall (11), the lower connecting wall comprises an annular outer supporting wall (27) radially outwardly of the annular sealing rim (21), the outer sealing wall (17) being in sealing engagement with the outer supporting wall (27).
  7. 7. The sealing arrangement according to claim 6, characterized in that the outer support wall (27) is provided with an annular outer support rim (271), which outer support rim (271) can extend radially inwards of the outer sealing wall (17).
  8. 8. The sealing structure according to claim 7, wherein a sealant is provided between the outer sealing wall (17) and the outer supporting wall (27), and an outer sealant receiving groove (171) recessed outward is provided on a radially inner side of the outer sealing wall (17).
  9. 9. A sealing arrangement according to any one of claims 2-8, characterized in that the radially outer side of the annular sealing wall (11) is further provided with an annular receiving groove (13) adjoining the annular sealing wall (11).
  10. 10. The sealing structure according to any one of claims 2 to 8, characterized in that the outer diameter of the annular sealing wall (11) is smaller than the inner diameter of the annular sealing rim (21).
  11. 11. A sealing arrangement according to any one of claims 2-8, characterized in that the annular sealing rim (21) is further provided with a protruding annular locating rim (24) radially inside, the outer diameter of the annular locating rim (24) being smaller than the inner diameter of the annular sealing wall (11).
  12. 12. The sealing arrangement according to any one of claims 2 to 8, characterized in that the annular sealing rim (21) is provided with at least one venting groove (23) at intervals.
  13. 13. The sealing structure according to claim 1, wherein the air discharge groove (23) does not penetrate the exterior surfaces of the first housing (10) and the second housing (20).

Description

Sealing structure Technical Field The present disclosure relates generally to the field of medical device technology. More particularly, the present disclosure relates to a sealing structure. Background In the sealing field of medical instruments such as CGM emitter components, the main stream sealing connection mode is dispensing sealing, and the application of integral injection molding is less due to higher process difficulty and cost. Similar medical instruments are often needed to be closely attached to the surface of a human body for more than 7 days, and the water resistance, the safety and the appearance consistency of the product are strictly required. The prior art either relies on high-viscosity semisolid glue and has a large-aspect-ratio glue line shape, or adopts a negative pressure assembly process to cope with glue line deformation caused by trapped air by enhancing the glue line strength, prolonging the flow path or relieving the air compression, so that the glue line has the advantages of less glue products, high cost, long curing time, higher equipment and process cost and still can not solve the problem of trapped air glue overflow. In view of the foregoing, it is desirable to provide a seal structure that can rapidly exhaust the gas in the annular seal cavity during the seal assembly process, and improve the pressure balance between the inside and outside of the cavity after the seal. Disclosure of Invention In order to solve at least one or more of the technical problems mentioned above, the present disclosure proposes a sealing structure. The disclosure provides a sealing structure, which comprises a first shell and a second shell, wherein the first shell comprises a convex upper connecting wall, the second shell can be buckled with the first shell and jointly surrounds and defines an annular sealing cavity, the second shell is provided with a lower connecting wall, and/or the upper connecting wall and/or the lower connecting wall are/is provided with an exhaust groove communicated with the annular sealing cavity, the exhaust groove is communicated with the outside in the buckling process of the first shell and the second shell, and after the buckling is completed, the exhaust groove is sealed by sealant arranged between the upper connecting wall and the lower connecting wall. In some embodiments, a through hole penetrating the first housing is formed in a radially inner side of the upper connecting wall, the upper connecting wall includes an annular sealing wall disposed adjacent to the through hole, and the lower connecting wall includes an annular sealing edge engaged with the annular sealing wall. In some embodiments, the sealing glue is filled between the annular sealing wall and the annular sealing edge, and in the process of buckling the first shell and the second shell, the sealing glue is synchronously extruded into the exhaust groove, and after sealing is finished, the exhaust groove and a gap between the annular sealing wall and the annular sealing edge are completely sealed. In some embodiments, the second housing includes a bottom shell and a middle shell fixedly connected to each other, and an annular sealing rim is disposed on the middle shell. In some embodiments, a sealant is filled between the bottom shell and the middle shell, and a sensor groove communicated with the annular sealing cavity is arranged on the middle shell. In some embodiments, the upper connecting wall further has an annular outer sealing wall radially outward of the annular sealing wall, and the lower connecting wall has an annular outer support wall radially outward of the annular sealing rim, the outer sealing wall sealingly engaging the outer support wall. In some embodiments, the outer support wall is provided with an annular outer support rim that can extend radially inward of the outer seal wall. In some embodiments, a sealant is disposed between the outer sealing wall and the outer supporting wall, and an outer sealant groove recessed outward is disposed radially inward of the outer sealing wall. In some embodiments, the radially outer side of the annular sealing wall is further provided with an annular receiving groove adjoining the annular sealing wall. In some embodiments, the outer diameter of the annular sealing wall is less than the inner diameter of the annular sealing rim. In some embodiments, the radially inner side of the annular sealing rim is further provided with a protruding annular locating rim, the outer diameter of the annular locating rim being smaller than the inner diameter of the annular sealing wall. In some embodiments, the annular seal is provided with at least one vent groove spaced therealong. In some embodiments, the vent slot does not extend through the exterior surfaces of the first and second housings. Through the seal structure provided above, this embodiment of the disclosure forms annular seal chamber and is equipped with annular seal edge through setting up b