CN210376777U

CN210376777U - Device sealing and fixing structure of optical module

Info

Publication number: CN210376777U
Application number: CN201921622727.8U
Authority: CN
Inventors: 罗岱
Original assignee: Wuhan Inphilight Technology Co Ltd
Current assignee: Wuhan Inphilight Technology Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-04-21
Anticipated expiration: 2029-09-27

Abstract

The utility model discloses a sealed fixed knot of device of optical module constructs relates to optical communication field technical field, it is sealed with waterproof glue to the simplicity, the bonding strength of apron and cavity is not high, can appear the silica gel layer damage under colliding with, falling etc. great external force external disturbance, the phenomenon of droing, and then lead to sealed inefficacy or even the apron drops etc. and device casing point is glued the position and is pressed the back by the apron, and its combination clearance is very little, under the circumstances that the volume of gluing is inhomogeneous, the volume of gluing is too little, probably has local small gas pocket, leads to the problem of sealed inefficacy, now proposes following scheme, including the device casing that is equipped with the inner chamber, be equipped with the apron on the device casing, the top of device casing is equipped with waterproof silica gel along its circumference. The utility model discloses a step ladder groove structure on apron and the device casing combines, has inside and outside two rings of waterproof silica gel to carry out the clearance and fills and guarantee airtight, and the inner chamber still has the powerful structure to glue the assurance structure fastening simultaneously, and whole product sealing reliability is splendid.

Description

Device sealing and fixing structure of optical module

Technical Field

The utility model relates to an optical communication field technical field especially relates to a device sealing and fixing structure of optical module.

Background

The optical devices are generally required to be packaged and produced in a dust-free workshop with constant temperature and humidity, the device shell comprises various optical modules, electric chips and various photoelectric elements, and the optical device shell is required to be sealed in order to ensure the normal operation of the elements. The common sealing method of the optical device is to glue the joint seam of the structural member for filling the seam. Two typical glues are mentioned below: the waterproof silica gel mainly has the functions of realizing sealing and isolating air, moisture and the like; the structural adhesive is mainly used for bonding and fastening, and ensures that parts are connected tightly and reliably.

The current general sealing mode is as follows: and (3) coating waterproof silica gel on the peripheral frame of the upper end surface of the device shell, then covering the cover plate, pressing the cover plate to be flat, and curing glue to realize sealing of the optical device shell. The method can realize the sealing of the optical device, isolate dust and water vapor in the air and protect the normal work of the photoelectric element in the inner cavity of the product from interference. However, this approach presents the following risk points: 1. the cover plate is sealed by waterproof glue, the bonding strength of the cover plate and the cavity is not high, and the phenomena of damage and falling of a silica gel layer can occur under the external interference of large external force such as collision, falling and the like, so that the sealing failure is caused, even the cover plate falls off and the like; 2. after the dispensing part of the device shell is pressed by the cover plate, the combination gap is very small, and under the conditions that the dispensing amount is not uniform and the dispensing amount is too small, local micro air holes possibly exist to cause sealing failure, so that the device sealing and fixing structure of the optical module is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device sealing fixing structure of optical module, it is sealed with waterproof glue to have solved current simple, the bonding strength of apron and cavity is not high, colliding with, can appear the silica gel layer damage under great external force external interference such as fall, the phenomenon of droing, and then lead to sealed inefficacy apron to drop etc. and the back is pressed by the apron in the position is glued to the device casing point, its joint clearance is very little, it is inhomogeneous to glue the volume, glue under the too few condition of volume, probably there is local small gas pocket, lead to the problem of sealed inefficacy.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a sealed fixed knot of device of optical module constructs, is including the device casing that is equipped with the inner chamber, be equipped with the apron on the device casing, the top of device casing is equipped with waterproof silica gel along its circumference, waterproof silica gel's inner circle is equipped with the structure that bonds with the top of device casing and glues.

Preferably, the top of device casing is equipped with the ladder groove, and just can put into the ladder inslot to the apron, the ladder groove depth on the device casing is 0.35mm, the thickness of cover plate is 0.7 mm.

Preferably, the inner cavity of the device shell is provided with 2 circular counter bores, the diameter of each circular counter bore is 1.5mm, the depth of each circular counter bore is 0.1mm, and the structural adhesive is located at the corresponding circular counter bore.

Compared with the prior art, the beneficial effects of the utility model are that: through the combination of the cover plate and the stepped groove structure on the device shell, the inner ring and the outer ring of waterproof silica gel are filled in the gap to ensure airtightness, and meanwhile, the inner cavity is also provided with a strong structural adhesive to ensure structural fastening, so that the sealing reliability of the whole product is excellent.

Drawings

Fig. 1 is a schematic view of a three-dimensional structure of a cover plate and a device housing of a device sealing and fixing structure of an optical module according to the present invention;

fig. 2 is a schematic view of a top view structure of a device housing of a device sealing and fixing structure of an optical module according to the present invention;

fig. 3 is a schematic view of a sealed rear front view structure of a device sealing and fixing structure of an optical module according to the present invention.

In the figure: 1 cover plate, 2 device shells, 3 waterproof silica gel and 4 structural adhesive.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a device sealing and fixing structure of an optical module includes a device housing 2 provided with an inner cavity, a cover plate 1 is provided on the device housing 2, a waterproof silica gel 3 is provided on the top of the device housing 2 along the circumferential direction thereof, and an inner ring of the waterproof silica gel 3 is provided with a structural adhesive 4 bonded to the top of the device housing 2.

In this embodiment, the top of device casing 2 is equipped with the ladder groove, and apron 1 just can put into the ladder groove, and the ladder groove depth on the device casing 2 is 0.35mm, and the thickness of apron 1 is 0.7 mm.

In this embodiment, the inner cavity of the device housing 2 is provided with 2 circular counter bores, the diameter of the circular counter bore is 1.5mm, the depth of the circular counter bore is 0.1mm, and the structural adhesive 4 is located at the circular counter bore.

According to the working principle, firstly, a stepped groove is formed in the position, where the cover plate 1 is placed, of the upper end of the device shell 2, and the depth of the groove needs to be different from the thickness of the cover plate 1, so that the outer side of the device shell is glued and attached. Enough glue dispensing area is reserved around the stepped groove and is used for dispensing a circle of waterproof silica gel 3 in the inner circle. And a plurality of glue dispensing pit positions are independently arranged in the non-waterproof glue dispensing area and used for placing the structural glue 4. The waterproof silica gel 3 is firstly dispensed in a circle in the inner ring of the stepped groove, then a proper amount of structural glue 4 is dispensed at the reserved structural glue dispensing position, the glue is required to be full, and the glue dispensing pit position can be protruded, so that the structural glue 4 can be fully contacted with the cover plate 1 after the cover plate 1 is covered. After the two kinds of glue are dispensed, the cover plate 1 is placed in the stepped groove, and the cover plate 1 is pressed to be flat. Finally, a circle of waterproof silica gel 3 is dotted along the outer edge of the cover plate 1, and after the glue is cured according to requirements, the device shell 2 can achieve the expected sealing effect.

The device shell 2 of the optical device is combined with the cover plate 1, waterproof silica gel 3 is arranged on the inner side of a joint gap between the cover plate 1 and the device shell 2 for primary sealing, a circle of waterproof silica gel 3 is additionally arranged on the outer side of the joint gap for secondary sealing, and the tight and reliable sealing of the device shell 2 is ensured. The ladder groove structure can be installed prepositioned to apron 1 on the one hand, can protect 1 edge of apron not influenced by external world colliding with on the two sides, and the third can reserve the attachment space for outer lane glue. In addition, the upper end surface of the inner side of the cavity is firmly bonded with the cover plate 1 through the structural adhesive 4 and is tightly combined. Therefore, the sealing effect is enhanced, the structural firmness is guaranteed, the reliability of glue sealing of the cavity of the optical device is greatly improved by the whole sealing structure and the process method, and the reject ratio caused by untight sealing of the product is reduced.

Wherein, in order to ensure that the cover plate 1 can be placed into the stepped groove of the device shell 2, a fit clearance of 0.05-0.1mm is reserved in the length and width directions. The depth of the stepped groove on the device shell 2 is 0.35mm, the thickness of the cover plate 1 is 0.7mm, after the two are attached, half of the thickness of the cover plate 1 is contained in the device shell 2, and the other half of the thickness is higher than the device shell 2. The inner cavity of the device shell 2 is provided with 2 circular counter bores with the diameter of 1.5mm and the depth of 0.1mm, and the 2 counter bores are used for dispensing structural adhesive 4.

Glue with the point even with waterproof silica gel 3 along 2 ladder groove points full circles of device casing, then trade 4 point glue syringe needles of structural adhesive, above the sufficient structural adhesive 4 of point income in the counter bore. In order to ensure that the structural adhesive 4 is fully contacted with the cover plate after the cover plate is covered, the adhesive amount of the structural adhesive 4 needs to be full and protrudes out of the upper surface of the counter bore.

Cover the cover plate 1 and press gently to flatten. And then, continuously using the dispensing needle to fully dispense a whole circle of waterproof silica gel 3 along the outer circle of the cover plate 1. The waterproof silica gel 3 needs to be full and uniform and completely covers a triangular area formed by assembling the cover plate 1 and the device shell 2. After the dispensing step is completed, the device is placed into a baking oven for curing, and the process is completed.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a sealed fixed knot of device of optical module constructs, is including device casing (2) that are equipped with the inner chamber, its characterized in that, be equipped with apron (1) on device casing (2), the top of device casing (2) is equipped with waterproof silica gel (3) along its circumference, the inner circle of waterproof silica gel (3) is equipped with glues (4) with the structure of the top bonding of device casing (2).

2. The device sealing and fixing structure of the optical module according to claim 1, wherein a stepped groove is formed at the top of the device housing (2), and the cover plate (1) can be just placed in the stepped groove, the depth of the stepped groove on the device housing (2) is 0.35mm, and the thickness of the cover plate (1) is 0.7 mm.

3. The device sealing and fixing structure of the optical module according to claim 1, wherein the inner cavity of the device housing (2) is provided with 2 circular counter bores, the diameter of each circular counter bore is 1.5mm, the depth of each circular counter bore is 0.1mm, and the structural adhesive (4) is located at each circular counter bore.