Waterproof sealing structure for top of columnar object and antenna

Abstract

The invention discloses a waterproof sealing structure for the top of a columnar object. The waterproof sealing structure comprises a shell and a top cover, the shell is columnar, the lower end of shell is provided with an opening, and the upper end of the shell is provided with a sealing surface; an opening is formed in the center of the sealing surface; the top cover is matched with the opening;an extending part protrudes downwards from the opening of the sealing surface; the extending part is hollow and penetrates up and down; and the radial section of an inner cavity of the extending partis the same as that of the opening, the side wall of the top cover is bonded with the inner wall of the opening through a first waterproof glue layer, the edge of the lower end of the top cover is provided with a second waterproof glue layer, the second waterproof glue layer is arranged below the top cover, and the second waterproof glue layer is arranged in the extending part. The invention further discloses an antenna adopting the waterproof sealing structure for the top of the columnar object. According to the waterproof sealing structure for the top of the columnar object and the antenna,it can be guaranteed that the wall thickness of the columnar shell is uniform, the waterproof performance of the sealing end is good, internal components of the shell cannot be affected, production is convenient, and the production cost is low.

Description

technical field [0001] The invention relates to the field of pillar products, in particular to a waterproof sealing structure and an antenna at the top of a pillar. Background technique [0002] Cylindrical shells are used in many products. One end is open for placing objects in the shell, and the other end is required to be sealed to achieve waterproof effects. During the production process, the wall thickness of the product is required to be uniform, especially In aerospace, electronic equipment and other fields, there are high requirements for product precision, and the uniformity of the shell wall thickness has a great influence on product precision. [0003] Now the production of columnar shells mostly adopts the method of injection molding. During the injection molding process, if one end of the formed cylindrical shell is closed, the core / core of the shell can only be fixed at one end. During the injection molding process, the core / core will be deflected by the press...

AI Technical Summary

Problems solved by technology

[0005] One is, if figure 1 As shown, there is an opening 2 directly on the top of the housing 1, and a top cover 3 matching the opening 2 is configured. When sealing the housing 1 with the top cover 3, a layer of waterproof glue is applied to the opening 2, and then the top cover 3 is pressed into the opening 2, and the top cover 3 and the casing 1 are bonded by waterproof glue. 2. In the process of pressing the top cover 3 into the opening 2, there is too much waterproof glue on the side wall of the opening 2, and the excess waterproof glue will be squeezed into the casing 1, which will damage the casing 1. The internal parts are affected, the waterproof glue is too little, the bond is not stable and the waterproof effect is not good; 3. The bonding surface of the shell 1 and the top cover 3 is small, and the bonded part of the shell 1 and the top cover 3 is prone to gaps. risk of water leakage

[0006] Second, if figure 2 As shown, in order to increase the waterproof performance and the bonding force between the top cover 3 and the casing 1, a step 4 is designed at the top opening 2 of the casing 1, and the top cover 3 matched with the step 4 is set, and then the waterproof glue is used to seal the The top cover 3 is bonded to the step 4 at the top of the housing 1. The main disadvantages of this design are: the injection mold needs to be redesigned, the cost of the mold increases, and the mold must be demolded from both ends after the injection molding is completed. The demoulding process complex

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