Sealing compound sealing structure for BOX tube shell of optical device

Abstract

The utility model belongs to the technical field of optical communication element manufacturing, and particularly relates to a sealant sealing structure of an optical device BOX tube shell, which is characterized by comprising a shell seat, a cover plate, a flexible circuit board and an optical fiber, the shell seat and the cover plate are both injection molding parts or aluminum parts with U-shaped cross sections, the shell seat is overturned by 90 degrees and buckled with the cover plate to form the BOX tube shell, and the flexible circuit board is arranged on the flexible circuit board. A circuit board connecting area is arranged on the protruding edge at one end of the shell seat, and an optical fiber connecting area is arranged on the protruding edge at the other end of the shell seat; the bottom of the shell base sinks in the middle, a plane boss used for installing components is arranged in the sinking area, and a glue containing groove is formed in the periphery of the plane boss. Cover plate sliding grooves perpendicular to the sinking area are formed in the protruding edges at the two ends of the shell base respectively, positioning protruding edges are arranged at the positions, corresponding to the cover plate sliding grooves, of the cover plate, and when the positioning protruding edges of the cover plate are buckled with the cover plate sliding grooves, the two protruding edges of the cover plate sink into the glue containing groove. The beneficial effects of the utility model are that internal components are prevented from being touched by mistake due to position deviation when the cover plate is placed, and glue is prevented from overflowing into the housing.

Description

Technical Field

[0001] This utility model belongs to the field of optical communication component manufacturing technology, and in particular relates to a sealing structure for an optical device BOX shell. Background Technology

[0002] With the rapid development of the optical communication industry, data centers, as the infrastructure of information technology, are experiencing explosive growth in data volume and computing demands. A prominent issue facing data centers is heat dissipation, as traditional air-cooling systems are increasingly unable to meet current cooling requirements. Against this backdrop, liquid cooling technology has emerged. Consequently, the demand for optical devices that can meet the requirements of liquid cooling technology is also increasing. Furthermore, with the increasing maturity of sealants suitable for liquid cooling applications, the method of sealing the housing of optical devices with adhesives has gained wider application due to its unique advantages.

[0003] Currently, most BOX tube shells are assembled with screws, or glue is applied to the gaps after screw assembly. However, the sealing effect is not ideal, and glue overflow often occurs during the fastening process. Due to the limitations of the BOX tube shell structure, the sealing problem of the tube shell has not been solved. Utility Model Content

[0004] The purpose of this utility model is to provide a sealing structure for the BOX housing of optical devices, overcome the shortcomings of the prior art, improve the structure of the BOX housing, and set an adhesive groove at the bottom of the housing base. At the same time, a fastening guide groove is also set on the cover plate to make the fastening action accurate, reduce the problem of adhesive overflow during housing assembly, and avoid the problem of adhesive overflow contaminating the inside of the housing.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A sealing structure for an optical device BOX shell includes a shell base, a cover plate, a flexible circuit board, and an optical fiber. Both the shell base and the cover plate are U-shaped injection molded parts or aluminum parts. The shell base is rotated 90 degrees and snapped together with the cover plate to form the BOX shell. One end of the shell base has a circuit board connection area, and the other end has an optical fiber connection area. The bottom of the shell base is centrally recessed, and a planar boss for mounting components is provided within the recessed area. A glue-receiving groove is formed around the planar boss. The two end edges of the shell base each have a cover plate groove perpendicular to the recessed area. A positioning protrusion is provided on the cover plate corresponding to the cover plate groove. When the positioning protrusion of the cover plate engages with the cover plate groove, the two protrusions of the cover plate sink into the glue-receiving groove.

[0007] Furthermore, the cover plate has extended wing plates at both ends. After the housing and the cover plate are combined, the wing plates cover the circuit board connection area and the optical fiber connection area.

[0008] Furthermore, the optical fiber connection area is uniformly provided with 2-4 optical fiber mounting slots.

[0009] Furthermore, the depth of the adhesive groove is 2-3 mm.

[0010] Furthermore, the wing plate corresponding to the optical fiber connection area is provided with a groove that corresponds to the shape and size of the optical fiber mounting slot.

[0011] Furthermore, the cross-section of the fiber optic mounting groove is a semi-circular groove or a rectangular groove.

[0012] Furthermore, sealant is applied fully between the flexible circuit board and the connection area between the circuit boards, as well as between the flexible circuit board and the wing plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) By improving the structure of the BOX tube shell, a glue-containing groove is set at the bottom of the shell base. The glue-containing groove can ensure the thickness of the sealant and guarantee the sealing effect.

[0015] 2) The cover plate is equipped with a fastening guide groove to ensure accurate fastening action and avoid accidental contact with internal components due to positional deviation when placing the cover plate. This ensures the sealing effect and further prevents glue from overflowing into the housing.

[0016] 3) The BOX shell structure of this utility model, compared with the traditional BOX solution with four surrounding walls, greatly reduces the process difficulty of chip mounting, gold wire bonding and coupling in the packaging process, and at the same time facilitates the inspection of glue overflow during the packaging process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the shell structure in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the cover plate structure in an embodiment of this utility model;

[0020] In the figure: 1-shell base; 2-cover plate; 3-flexible circuit board; 4-optical fiber; 5-circuit board connection area; 6-optical fiber connection area; 7-planar boss; 8-adhesive groove; 9-positioning protrusion; 10-cover plate groove; 11-wing plate; 12-optical fiber mounting groove; 13-groove. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0023] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0024] See Figure 1-3 This is a schematic diagram of an embodiment of the sealing structure of a BOX tube shell for an optical device according to the present invention. It includes a shell base 1, a cover plate 2, a flexible circuit board 3, and an optical fiber 4. Both the shell base 1 and the cover plate 2 are injection molded parts or aluminum parts with a U-shaped cross-section. The shell base 1 is rotated 90 degrees and fastened with the cover plate 2 to form a BOX tube shell. A circuit board connection area 5 is provided on the protruding edge of one end of the shell base 1, and an optical fiber connection area 6 is provided on the protruding edge of the other end of the shell base 1. The bottom of the shell base 1 is recessed in the center, and a planar boss 7 is provided in the recessed area. An adhesive groove 8 is formed around the planar boss 7. The adhesive groove 8 has a depth of 2-3mm. The adhesive groove 8 can ensure that the adhesive does not overflow while forming a certain thickness of adhesive, thereby ensuring the adhesive sealing effect. The housing 1 has vertically recessed cover plate grooves 10 on its two protruding edges. The cover plate 2, corresponding to the cover plate grooves 10, has positioning protrusions 9. When the positioning protrusions 9 of the cover plate 2 engage with the cover plate grooves 10, the two protrusions of the cover plate 2 sink into the adhesive receiving grooves 8. The cover plate grooves 10 ensure that the cover plate 2 is precisely positioned with the housing 1 during installation before falling, preventing damage to components inside the housing caused by inaccurate cover plate placement. Furthermore, this position, combined with the protruding design of the cover plate, prevents adhesive from overflowing from the four overflow holes into the inside of the housing. Flexible circuit boards and optical fibers are commonly used components in optical communication devices.

[0025] In this embodiment of the invention, sealant is used to fill all the gaps in the assembled housing, cover plate, flexible circuit board, and optical fiber, achieving a sealed housing effect.

[0026] The cover plate 2 has extended wing plates 11 at both ends. After the housing 1 and the cover plate 2 are combined, the wing plates 11 cover the circuit board connection area 5 and the optical fiber connection area 6. The wing plate 11 corresponding to the optical fiber connection area 6 has a groove 13 that corresponds to the shape and size of the optical fiber mounting slot 12. Four optical fiber mounting slots 12 are evenly arranged on the optical fiber connection area 6. The cross-section of the optical fiber mounting slot 12 is a semi-circular slot or a rectangular slot, which matches the optical fiber specification. After the housing 1 and the cover plate 2 are assembled, the optical fiber mounting slot 12 will form four optical fiber holes, which can facilitate the fixing and sealing of the optical fiber.

[0027] The planar boss 7 is reserved for the TEC, COC, lens isolator fiber optic dispensing area inside the optical communication device, and there are no tube walls obstructing this area on both sides. Sealant is fully applied between the flexible circuit board 3 and the circuit board connection area 5, as well as between the flexible circuit board 3 and the wing plate 11.

[0028] This embodiment of the invention takes a light emitting assembly commonly used in optical devices as an example. The sealant is loaded into the glue tube adapted to the dispensing machine. The appropriate dispensing needle is selected according to the glue dispensing volume requirements of the dispensing process. A high-precision pneumatic dispensing machine is selected. The dispensing volume is controlled by adjusting the air pressure and dispensing time. This design can use either a manual or automatic dispensing machine. If it is an automatic dispensing machine with a vertically placed glue tube, it can be equipped with an angled bending needle.

[0029] The assembly process is as follows: The first step is to assemble the flexible circuit board with the housing. Apply an appropriate amount of sealant to the connection area 5 of the circuit board, place the corresponding bonding position of the flexible circuit board in the connection area 5 of the circuit board, adjust the position of the flexible circuit board, and then cure it according to the curing conditions of the sealant to fix the flexible circuit board 3.

[0030] The second step is to proceed with the normal packaging process of optical devices, which generally includes gold wire bonding, lens coupling, and fiber coupling. After these internal components are packaged, the sealing of the cover plate begins. At this time, the four positioning protrusions 9 of the cover plate 2 are aligned with the four cover plate grooves 10 of the housing, and the cover plate 2 is pressed down so that the lower edge of the cover plate contacts the bottom of the adhesive groove 8, thus completing the assembly of the cover plate 2 and the housing 1.

[0031] The third step is to seal and fill the groove formed by the housing and the cover plate with glue. First, inject glue into the four cover plate grooves after the housing and cover plate are assembled. Then, inject glue into the gaps on both sides of the housing and the fiber optic side. When injecting, start from one end of the gap and inject glue continuously. The glue should overflow the gap. On the flexible circuit board side, use glue to cover it as well. Because the glue overflow space on the flexible circuit board side can be relatively large, when sealing, while controlling the amount of glue, make sure to cover the part where the flexible circuit board and the housing are joined with glue.

[0032] This invention ensures a good seal while mitigating the risk of adhesive overflow into internal components. Assembly is simple and easy to operate. The adhesive groove design allows for precise determination of the adhesive amount, further improving the sealing reliability of the housing. Whether using manual dispensing or automatic sealing, only a suitable dispensing needle is needed. The sealing process is simple, and a single operation is sufficient to seal the casing.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for an optical device BOX housing, characterized in that, The device includes a housing, a cover plate, a flexible circuit board, and an optical fiber. Both the housing and the cover plate are injection-molded or aluminum parts with a U-shaped cross-section. The housing is rotated 90 degrees and snapped together with the cover plate to form a BOX tube. One end of the housing has a circuit board connection area, and the other end has an optical fiber connection area. The bottom of the housing is centrally recessed, and a planar boss for mounting components is provided in the recessed area. The planar boss is surrounded by a glue-receiving groove. The two ends of the housing have cover plate grooves that are perpendicular to the recessed area. The cover plate corresponding to the cover plate groove has a positioning protrusion. When the positioning protrusion of the cover plate is engaged with the cover plate groove, the two protrusions of the cover plate sink into the glue-receiving groove.

2. The sealing structure for an optical device BOX housing according to claim 1, characterized in that, The cover plate has extended wing plates at both ends. After the housing and the cover plate are combined, the wing plates cover the circuit board connection area and the optical fiber connection area.

3. The sealing structure for an optical device BOX housing according to claim 2, characterized in that, The optical fiber connection area is evenly provided with 2-4 optical fiber mounting slots.

4. The sealing structure for an optical device BOX housing according to claim 1, characterized in that, The depth of the adhesive reservoir is 2-3 mm.

5. The sealing structure for an optical device BOX housing according to claim 3, characterized in that, The wing plate corresponding to the optical fiber connection area is provided with grooves that correspond to the shape and size of the optical fiber mounting slot.

6. The sealing structure for an optical device BOX housing according to claim 3, characterized in that, The cross-section of the fiber optic mounting slot is a semi-circular slot or a rectangular slot.

7. The sealing structure for an optical device BOX housing according to claim 2, characterized in that, Sealant is applied fully between the flexible circuit board and the connection area between the circuit boards, as well as between the flexible circuit board and the wing plate.

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