PCBA and tosa shell assembly jig and system of an optical module

Abstract

The utility model discloses a kind of PCBA and TOSA shell assembly fixture of optical module, including base, cover, limiting mechanism and pressing mechanism;Multiple assembly grooves are evenly spaced on the base along the length direction, and PCBA and TOSA shell to be assembled are placed in the assembly groove, and the lap joint area of PCBA is overlapped on the assembly area of TOSA shell;Each assembly groove is configured with the pressing mechanism, and the pressing mechanism is used to press the lap joint area of PCBA;The pressing mechanism is installed on the cover, and the cover is buckled on base;Pressing mechanism is above the lap joint area of PCBA.The utility model further discloses a kind of optical module assembly system.The utility model has the beneficial effects that multiple assembly grooves are designed on base, and corresponding pressing mechanism is designed on cover with assembly groove, the assembly of multiple TOSA shell and PCBA is realized, and assembly efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to optical module manufacturing technology, specifically to an assembly fixture and system for an optical module PCBA and TOSA housing. Background Technology

[0002] Currently, in the production of 400G QSFP-DD FR4 series optical modules, the assembly of the PCBA (Printed Circuit Board Assembly) and TOSA (Optical Transmitter Subassembly) housing mainly relies on manual pressing operations. This method has the following technical drawbacks: Low efficiency: The TOSA housings need to be pressed one by one and aligned with the PCBA pads. Each optical module requires repeating this process 5 times (taking FR4 as an example), with assembly time reaching 3-5 minutes per unit. This low assembly efficiency cannot meet the batch production cycle. In addition, manual pressing is prone to causing the TOSA housing to tilt due to uneven force (typical offset ±0.1mm). Gaps exist between the TOSA and PCBA assembly, affecting optical path coupling efficiency, increasing insertion loss (typical value >0.5dB), and affecting assembly quality.

[0003] Therefore, it is necessary to improve existing technologies. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a PCBA and TOSA housing assembly fixture and system for optical modules, aiming to improve assembly efficiency.

[0005] The technical solution adopted in this utility model is: a PCBA and TOSA housing assembly fixture for an optical module, including a base, a cover plate, a limiting mechanism and a pressing mechanism; Multiple assembly slots are evenly spaced along the length of the base. The PCBA and TOSA housing to be assembled are placed in the assembly slots one after the other, with the overlapping area of ​​the PCBA overlapping the assembly area of ​​the TOSA housing. Each of the assembly slots is equipped with the pressing mechanism, which is used to press the overlap area of ​​the PCBA; The pressing mechanism is mounted on the cover plate, and the cover plate is fastened to the base; the pressing mechanism is located above the overlap area of ​​the PCBA.

[0006] According to the above scheme, the pressing mechanism includes a fixed plate, and a first pressing component and a second pressing component connected to the fixed plate; The fixing plate is mounted on the cover plate; The lower end of the first pressing component is the first working end, which is adapted to the lateral segment position of the PCBA overlap area; The lower end of the second pressing component is the second working end, which is adapted to the longitudinal section position of the PCBA overlap area.

[0007] According to the above scheme, the first pressing component and the second pressing component have the same structure, each including a pressing spring and a pressing block; the upper end of the pressing spring is connected to the fixing plate, the lower end of the pressing spring is connected to the top of the pressing block, and the lower end face of the pressing block contacts the overlapping area of ​​the PCBA.

[0008] According to the above scheme, the pressing blocks of the two pressing components are made of PEEK material.

[0009] According to the above scheme, the cover plate is provided with a first guide groove adapted to the first pressing component and a second guide groove adapted to the second pressing component; the first pressing component is installed in the first guide groove, and the pressing block of the first pressing component moves up and down along the first guide groove; the second pressing component is installed in the second guide groove, and the pressing block of the second pressing component moves up and down along the second guide groove; the fixing plate covers the first guide groove and the second guide groove.

[0010] According to the above scheme, each of the assembly slots is configured with a limiting mechanism for limiting the position of the TOSA housing, and the limiting mechanism is disposed on the base.

[0011] According to the above scheme, the limiting mechanism includes a limiting seat, a limiting spring, and a limiting plate; The limiting seat is located on the side of the assembly slot. The inner end of the limiting seat is provided with a bayonet, and the pin is located in the bayonet. The limiting plate is rotatably connected to the pin, and the inner end of the limiting plate is pressed against the edge of the TOSA housing. The rear end of the limiting seat is provided with a spring hole, the lower end of the limiting spring is located in the spring hole, and the upper end of the limiting spring is connected to the outer end of the limiting plate.

[0012] According to the above scheme, multiple protrusions are evenly spaced along the length of the base, and the assembly groove is between two adjacent protrusions.

[0013] According to the above scheme, a limiting strip is provided on the base between two adjacent assembly slots.

[0014] This utility model also employs an optical module assembly system, including the optical module PCBA and TOSA housing assembly fixture as described above.

[0015] The beneficial effects of this utility model are as follows: 1. This utility model designs multiple assembly slots on the base and press mechanisms corresponding to the assembly slots on the cover plate. When the cover plate is closed on the base, each pressing mechanism simultaneously presses and fixes the PCBA in the corresponding assembly slot, thereby realizing the assembly of multiple TOSA shells and PCBAs. Compared with the prior art, this greatly improves the assembly efficiency.

[0016] 2. The pressing mechanism of this utility model includes two sets of pressing components, which can press the transverse and longitudinal sections of the PCBA overlap area simultaneously; at the same time, a pressing spring is designed to perform synchronous elastic pressing, which can realize dynamic pressure compensation and avoid uneven force on the PCBA overlap area; compared with the prior art, the assembly quality is improved.

[0017] 3. The present invention incorporates a limiting mechanism to press and limit the TOSA housing, preventing displacement during the cover plate fastening process and ensuring assembly accuracy. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the TOSA housing and PCBA.

[0019] Figure 2 This is a simplified assembly diagram of the TOSA housing and PCBA.

[0020] Figure 3 This is a schematic diagram of the overall structure of Example 1.

[0021] Figure 4 This is a schematic diagram of the cover plate in Embodiment 1 (showing two guide grooves).

[0022] Figure 5 This is a schematic diagram of the pressing mechanism in Example 1.

[0023] Figure 6 This is a schematic diagram of the base structure in Example 1.

[0024] Figure 7 This is a schematic diagram of the limiting mechanism in Example 1.

[0025] Figure 8 This is a schematic diagram of the working state of the limiting mechanism in Example 1.

[0026] Figure 9 This is a schematic diagram of the working state of the pressing mechanism and the limiting mechanism in Example 1.

[0027] The components are: 1. TOSA housing; 2. PCBA; 3. Horizontal section; 4. Vertical section; 5. Cover plate; 6. Base; 7. First guide groove; 8. Second guide groove; 9. Limiting mechanism; 10. Limiting plate; 11. Limiting seat; 12. Limiting spring; 13. Fixing plate; 14. Boss; 15. Limiting strip; 16. First pressing assembly; 17. Second pressing assembly; 18. Pressing block; 19. Pressing spring; 20. Pin. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0031] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, without contradiction. Additionally, the term "a plurality of" indicates two or more.

[0033] like Figure 1 and 2 The diagram shows the assembly of the TOSA housing 1 and PCBA2 of the 400G QSFP-DD FR4 series optical module. With the width direction of the TOSA housing 1 as the horizontal direction and the length direction of the TOSA housing 1 as the vertical direction, the two adjacent sides of the TOSA housing 1 form an L-shaped assembly area. The rear side of the PCBA2 of the optical module has an L-shaped overlap area corresponding to the position of the assembly area. This overlap area includes a horizontal section 3 and a vertical section 4. The overlap area of ​​the PCBA2 is fixed to the assembly area of ​​the TOSA housing 1 with glue.

[0034] like Figure 3 and 4 The PCBA and TOSA housing assembly fixture for an optical module shown includes a base 6, a cover plate 5, a limiting mechanism 9 and a pressing mechanism. Multiple assembly slots are evenly spaced along the length of the base 6. The PCBA2 and TOSA housing 1 to be assembled are placed in the assembly slots one after the other, with the overlapping area of ​​PCBA2 overlapping the assembly area of ​​TOSA housing 1. Each of the assembly slots is equipped with the pressing mechanism 2, which is used to press the overlapping area of ​​the PCBA; The cover plate 5 is fastened onto the base 6; The pressing mechanism is installed on the cover plate 5 and is located above the overlap area of ​​PCBA2.

[0035] In this utility model, multiple assembly slots are designed on the base 6, which can simultaneously assemble multiple sets of TOSA housings 1 and PCBA2; each pressing mechanism is provided on the cover plate 5. When the cover plate 5 is closed on the base 6, each pressing mechanism simultaneously presses and fixes the PCBA2 in the corresponding assembly slot.

[0036] In this utility model, the cover plate 5 is connected to the base 6 by bolts at both ends.

[0037] Preferably, such as Figure 5 As shown, the pressing mechanism includes a fixed plate 13, and a first pressing component 16 and a second pressing component 17 connected to the fixed plate 13; The fixing plate 13 is installed on the cover plate 5 by bolts; The lower end of the first pressing component 16 is the first working end, which is adapted to the position of the transverse segment 3 of the PCBA2 overlap area; The lower end of the second pressing component 17 is the second working end, which is adapted to the position of the longitudinal segment 4 of the PCBA2 overlap area; When the cover plate 5 is fastened onto the base 6, the lower end of the first pressing component 16 presses the transverse section 3 of the PCBA2 overlap area, and the lower end of the second pressing component 17 simultaneously presses the longitudinal section 4 of the PCBA2 overlap area.

[0038] Preferably, the first pressing assembly 16 and the second pressing assembly 17 have the same structure, each including a pressing spring 19 and a pressing block 18; the upper end of the pressing spring 19 is connected to the fixing plate 13, the lower end of the pressing spring 19 is connected to the top of the pressing block 18, and the lower end surface of the pressing block 18 can contact the overlapping area of ​​the PCBA2.

[0039] In this utility model, a first pressing component 16 and a second pressing component 17 are designed, and a pressing spring 19 is used for synchronous elastic pressing, which can realize dynamic pressure compensation and avoid uneven force on the PCBA2 overlap area.

[0040] In this invention, the pressing blocks 18 of the two pressing components are made of PEEK material.

[0041] In this invention, the lower end face of the pressing block 18 of the two pressing components can be adapted to the transverse segment 3 and the longitudinal segment 4 of the PCBA2 overlap area.

[0042] In this invention, when the pressing component is pressed, it is offset from the optical fiber cable (connecting adapter) and adapter of the optical module.

[0043] Preferably, the cover plate 5 has a first guide groove 7 adapted to the first pressing component 16 and a second guide groove 8 adapted to the second pressing component 17. The first pressing component 16 is installed in the first guide groove 7, and the pressing block 18 of the first pressing component 16 can move up and down along the first guide groove 7. The second pressing component 17 is installed in the second guide groove 8, and the pressing block 18 of the second pressing component 17 can move up and down along the second guide groove 8. The fixing plate 13 covers the first guide groove 7 and the second guide groove 8.

[0044] In this invention, the design of the first guide groove 7 and the second guide groove 8 can improve the stability of the pressing component, thereby improving the assembly quality.

[0045] Preferably, each assembly slot is equipped with a limiting mechanism 9 for limiting the position of the TOSA housing 1, the limiting mechanism 9 being disposed on the base 6.

[0046] Preferably, such as Figure 7 , 8 As shown in Figures 9 and 9, the limiting mechanism 9 includes a limiting seat 11, a limiting spring 12, and a limiting plate 10; The limiting seat 11 is located on the side of the assembly slot (near the TOSA housing 1). The inner end of the limiting seat 11 is provided with a bayonet, and the pin 20 is located in the bayonet. The limiting plate 10 is rotatably connected to the pin 20, and the inner end of the limiting plate 10 (the end near the TOSA housing 1) is pressed against the edge of the TOSA housing 1. The rear end of the limiting seat 11 is provided with a spring hole, the lower end of the limiting spring 12 is located in the spring hole, and the upper end of the limiting spring 12 is connected to the outer end of the limiting plate 10 (the end away from the TOSA housing 1).

[0047] In this invention, the limiting spring 12 is always in a compressed state; under the action of the limiting spring 12, the inner end of the limiting plate 10 rotates downward around the pin 20 and presses against the edge of the TOSA housing 1, thereby limiting the TOSA housing 1. The lower surface of the inner end of the limiting plate 10 (pressing against the edge of the TOSA housing 1) can be designed as an inclined surface.

[0048] In this utility model, by adjusting the pre-compression of the limiting spring 12 in the limiting mechanism 9, the pressure threshold can be made to cover the range of 5-15N, which is compatible with various TOSA housings 1 such as FR4 / DR4 / LR4.

[0049] Preferably, such as Figure 6 As shown, a plurality of protrusions 14 are evenly spaced along the length of the base 6, and an assembly groove is formed between two adjacent protrusions 14; the protrusions 14 can limit the position of the TOSA housing 1 and PCBA2 in the assembly groove.

[0050] In this utility model, the limiting mechanism 9 is provided on the boss 14.

[0051] Preferably, a limiting strip 15 is provided on the base 6 between two adjacent assembly slots. The two ends of the limiting strip 15 are semi-circular structures that are adapted to the outer peripheral surface of the PCBA2 and can limit the PCBA2.

[0052] In this utility model, the base 6 is also provided with other limiting components to limit the TOSA housing 1 and PCBA2. This is an industry-standard technical method and will not be described in detail here.

[0053] Example 1 This embodiment includes the structure described above; the base 6 is provided with five assembly slots, corresponding to five sets of pressing mechanisms. The assembly slots are equipped with locating pins made of built-in hard alloy material (tolerance H7 / g6), which match the locating holes on the PCBA2 to achieve ±0.02mm repeatable positioning; the lower surface of the cover plate 5 is fitted with a silicone buffer layer (hardness Shore A 50±5), which is fixed and locked by hand-tightening screws. The silicone buffer layer can absorb the locking impact force and prevent PCBA2 deformation. The pressing mechanism uses a stainless steel helical spring, which provides initial support force through pre-compression; the pressing block 18 is made of PEEK material, and the pressing surface is laser-engraved with interlaced anti-slip textures (Ra=3.2μm).

[0054] The working principle of this embodiment is as follows: 1. Placement and positioning of TOSA housing 1: Place 5 TOSA housings 1 simultaneously in the assembly slot and use the inner end of the positioning plate 10 of the positioning mechanism 9 to press and limit them; 2. Dispensing: Perform dispensing operation in the assembly area of ​​TOSA housing 1; 3. PCBA2 loading and positioning: Place PCBA2 in the assembly slot of base 6, so that the overlapping area of ​​PCBA2 is located on the assembly area of ​​TOSA housing 1, and at the same time, make the positioning hole of PCBA2 cooperate with the positioning pin on base 6. 4. Locking the cover plate 5: Snap the cover plate 5 onto the base 6 and tighten the hand screws; at this time, the pressing mechanism presses and fixes the transverse section 3 and the longitudinal section 4 of the PCBA2 overlap area respectively; 5. Pressure holding and curing: Maintain pressure for 60 seconds, and the UV-cured adhesive will complete the bonding between the TOSA shell 1 and PCBA2; 6. Reset and unload: Loosen the hand screws and remove the cover plate 5, then take out the assembled PCBA2 and TOSA housing 1.

[0055] Through actual production and comparison with existing technologies, this embodiment can simultaneously complete the assembly of multiple pairs of TOSA housings 1 and PCBA2, shortening the single-piece assembly time to ≤1 minute. Excluding the subsequent curing process, the assembly time can be reduced from the traditional 180-300s to ≤25s, increasing the production capacity to 140 pieces / hour, greatly improving assembly efficiency. The elastic pressing mechanism ensures that each TOSA housing 1 is subjected to uniform force, with a pressure deviation of <5% and a positioning accuracy of ≤±0.05mm. The pressing block 18 is made of PEEK material to avoid rigid pressing, reducing the defect rate of assembled products to <0.1%.

[0056] Example 2 An optical module assembly system includes a PCBA and a TOSA housing assembly fixture for the optical module as described above.

[0057] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0058] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A PCBA and TOSA housing assembly fixture for an optical module, characterized in that, Includes a base, cover plate, limiting mechanism, and pressing mechanism; Multiple assembly slots are evenly spaced along the length of the base. The PCBA and TOSA housing to be assembled are placed in the assembly slots one after the other, with the overlapping area of ​​the PCBA overlapping the assembly area of ​​the TOSA housing. Each of the assembly slots is equipped with the pressing mechanism, which is used to press the overlap area of ​​the PCBA; The pressing mechanism is mounted on the cover plate, and the cover plate is fastened to the base; the pressing mechanism is located above the overlap area of ​​the PCBA.

2. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 1, characterized in that, The pressing mechanism includes a fixed plate, and a first pressing component and a second pressing component connected to the fixed plate; The fixing plate is mounted on the cover plate; The lower end of the first pressing component is the first working end, which is adapted to the lateral segment position of the PCBA overlap area; The lower end of the second pressing component is the second working end, which is adapted to the longitudinal section position of the PCBA overlap area.

3. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 2, characterized in that, The first pressing assembly and the second pressing assembly have the same structure, each including a pressing spring and a pressing block; the upper end of the pressing spring is connected to the fixing plate, the lower end of the pressing spring is connected to the top of the pressing block, and the lower end face of the pressing block contacts the overlapping area of ​​the PCBA.

4. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 3, characterized in that, The pressing blocks of the two pressing components are made of PEEK material.

5. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 3 or 4, characterized in that, The cover plate has a first guide groove adapted to the first pressing component and a second guide groove adapted to the second pressing component; the first pressing component is installed in the first guide groove, and the pressing block of the first pressing component moves up and down along the first guide groove; the second pressing component is installed in the second guide groove, and the pressing block of the second pressing component moves up and down along the second guide groove; the fixing plate covers the first guide groove and the second guide groove.

6. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 5, characterized in that, Each of the assembly slots is configured with a limiting mechanism for limiting the position of the TOSA housing, the limiting mechanism being disposed on the base.

7. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 6, characterized in that, The limiting mechanism includes a limiting seat, a limiting spring, and a limiting plate; The limiting seat is located on the side of the assembly slot. The inner end of the limiting seat is provided with a bayonet, and the pin is located in the bayonet. The limiting plate is rotatably connected to the pin, and the inner end of the limiting plate is pressed against the edge of the TOSA housing. The rear end of the limiting seat is provided with a spring hole, the lower end of the limiting spring is located in the spring hole, and the upper end of the limiting spring is connected to the outer end of the limiting plate.

8. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 1, characterized in that, The base has multiple protrusions evenly spaced along its length, and the assembly groove is located between two adjacent protrusions.

9. The PCBA and TOSA housing assembly fixture for an optical module as described in claim 1, characterized in that, A limiting strip is provided on the base between two adjacent assembly slots.

10. An optical module assembly system, characterized in that, The PCBA and TOSA housing assembly fixture for the optical module as described in any one of claims 1 to 4 and 6 to 9.

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