Optical module PCB and optical device assembly coupling positioning tool

Abstract

The utility model discloses an optical module PCB (printed circuit board) and optical device assembly coupling positioning tool, which relates to the technical field of optical module packaging and is realized by the following technical scheme: an XYZ three-axis manual displacement lifting sliding table is fixed on a bottom plate in a plug-in manner and is connected with a platform adapter plate and a sliding table adapter plate through screws; the L-shaped cantilever sliding table is buckled through a sunken step at the tail end of the sliding table adapter plate and is connected with the manual rotating sliding table in a sliding mode, and the manual rotating sliding table restrains the angle rotation controller provided with a semi-arc limiting body below a step body through the step body at the bottom of a rectangular body. The angle rotation controller is connected with an optical device grabbing positioner through a circumferential bolt, and the optical device grabbing positioner and a PCB positioning rack which is fixed on the bottom plate in an inserted mode below a cantilever of the optical device grabbing positioner form the coupling positioning tool for the optical module PCB and the optical device combination. According to the utility model, the relative position of the optical device and the PCB can be simply, efficiently and accurately positioned.

Description

Technical Field

[0001] The utility model relates to the technical field of optical module packaging, in particular to a tool for manually coupling an optical device and a printed circuit board PCB. Background Art

[0002] Optical modules are integrated with a variety of optical devices, usually composed of optical transmitting devices, optical receiving devices, functional circuits and optoelectronic interfaces. Optical devices are the core components of optical modules, and optical devices generally exist independently. Different types of optical modules use different optical devices. For ordinary optical modules, there are two types of optical devices, TOSA and ROSA, which have opposite functions. The basic structure of optical module packaging is the optical transmitting side module (TOSA) and the driving circuit, and the optical receiving side module is (ROSA) and the receiving circuit. The technical barriers in TOSA and ROSA are mainly in two aspects: optical chips and packaging technology. Generally, ROSA is packaged with a splitter, a photodiode that converts optical signals into voltage, and a transimpedance amplifier that amplifies voltage signals. TOSA is packaged with a laser driver, a laser and a multiplexer. In the production and manufacturing of optical modules, in addition to the research and development and manufacturing of functional circuits, the packaging process has become the most important link. Packaging sometimes has a great impact on performance. The packaging process of optical modules can be roughly divided into three types: TO-Can, BOX, and COB. The characteristic of TO-Can packaging is that the optical device is usually cylindrical and small in size; however, it is difficult to build in cooling in the module, which leads to heat dissipation difficulties. Therefore, TO-Can is generally used in short-distance transmission scenarios of 2.5~10Gbit / s, and is not suitable for high-power and long-distance transmission. There are four main packaging processes for TOSA and ROSA: 1. TO-CAN coaxial packaging: The shell is usually cylindrical. Because of its small size, it is difficult to build in cooling and heat dissipation. It is difficult to use for high-power output under high current, so it is difficult to use for long-distance transmission. 2. Butterfly packaging: The shell is usually a rectangular parallelepiped, and the structure and implementation functions are usually complex. 3. BOX packaging is a type of butterfly packaging. BOX packaging is also called butterfly packaging. It can be used for multi-channel parallel packaging and is suitable for long-distance and high-power transmission. However, BOX packaging is expensive and full of challenges for mass production. 4. COB packaging: COB packaging is the mainstream packaging method for 25Gbit / s and 100Gbit / s optical modules. Traditional single-channel 10Gb / s or 25Gb / s optical modules use SFP packaging to solder the electrical chip and TO-packaged optical transceiver components to the PCB board to form an optical module. When using a 25Gb / s chip, a 100Gb / s optical module requires 4 sets of components. If SFP packaging is used, it will require 4 times the space. COB packaging can integrate the TIA / LA chip, laser array, and receiver array into a small space to achieve miniaturization. However, the package requires precise positioning of the patch and coupling, otherwise it will affect parameters such as signal quality and bit error rate. The technical difficulty lies in the positioning accuracy of the optical chip patch (affecting the optical coupling effect) and the wiring quality (affecting the signal quality and bit error rate). Usually, optical modules with a rate of 25G and below mostly use single-channel TO or butterfly packaging, with standard processes and automation equipment, and low technical barriers.However, for high-speed optical modules with a rate of 40G and above, due to the laser rate limit (mostly 25G), they are mainly implemented through multi-channel parallelism, such as 40G is implemented by 4x10G, and 100G is implemented by 4x25G. The packaging of high-speed optical modules has put forward higher requirements for parallel optical design, high-speed electromagnetic interference, volume reduction, and heat dissipation under increased power consumption.

[0003] At present, there are automatic machines such as automatic placement machines, automatic wire bonding machines, and automatic coupling machines on the market. These machines can accurately position and couple specific components. However, these automatic machines are not suitable for the R&D stage or the later solution optimization stage when it is necessary to select and change the chips, functional circuits, and optical devices, because once the parameters are changed, high mold opening costs will be incurred. Therefore, the tooling for manually coupling optical devices and printed circuit boards PCB is the key to solving this problem.

[0004] PCBA refers to integrated circuit board, also known as printed circuit board. SMT patch and DIP plug-in are the methods often used in the PCBA production process. The whole process of PCB blank board through SMT patch or DIP plug-in is called PCBA. Active and passive electronic components are soldered to the integrated circuit board, and then placed inside the optical module. In simple terms, PCBA is actually a thin plate with integrated circuits and other electronic components, which can fix integrated circuits and other electronic components. The main difference between PCBA and PCB is that PCB is a bare board (empty board) and PCBA is a finished board. PCB, or printed circuit board, is the carrier of electrical connection of electronic components, and PCBA is the process of PCB processing and production. In other words, PCB is an empty printed circuit board without any parts on it. After SMT patch or DIP plug-in and other processes, PCBA is available. How to design this simple, efficient, precise positioning and highly compatible tooling has become the core issue. Utility Model Content

[0005] The main purpose of the utility model is to provide a simple, efficient, accurate and compatible optical module PCB and optical device assembly coupling and positioning tooling to address the shortcomings of the existing technology, so as to solve the coupling problem of optical module COB packaging in the sample, research and development, material verification and other stages.

[0006] To achieve the above-mentioned purpose, the utility model proposes a coupling positioning tool for an optical module PCB and an optical device assembly, comprising: an XYZ three-axis manual displacement lifting slide 2 fixed on a base plate 1 in a plug-in manner, characterized in that: the lifting slide 2 is connected to a platform adapter plate 3 and a slide adapter plate 4 by screws, and a cantilever slide 5 with a ┎-shaped structure is interlocked with a sunken step at the tail end of the slide adapter plate 4, and is slidably connected to a manual rotating slide 6, and the manual rotating slide 6 constrains an angle rotation controller 7 with a semicircular arc limit body under the step body through the bottom step body of the rectangular body, and the angle rotation controller 7 is connected to an optical device grabbing and locating device 11 through circumferential bolts, and the optical device grabbing and locating device 11 and a PCB positioning frame 15 fixed on the base plate 1 in a plug-in manner under its cantilever constitute a coupling positioning tool for an optical module PCB and an optical device assembly.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The utility model adopts a lifting slide 2 with XYZ three-axis manual displacement fixed on the bottom plate 1 by plugging, combined with a cantilever slide 5 with a ┎-shaped structure, and interlocked with the sunken steps at the tail end of the slide adapter plate 4, and a sliding connection manual rotating slide 6, and cooperates with the optical device grabbing locator 11 and the PCB positioning frame 15 fixed on the bottom plate 1 by plugging under its cantilever to form a coupling positioning tool for the optical module PCB and the optical device assembly. It is compatible with PCBs of various optical devices, and can simply and efficiently accurately locate the relative positions of optical devices and PCBs, solving the coupling problem of optical module COB packaging in the sample, research and development, material verification and other stages.

[0009] The utility model adopts manual tooling, which is convenient and quick, avoiding the design of bulky automated design. It has obvious advantages for test verification or small batch samples. R&D personnel can evaluate the feasibility of this solution based on simple manual tooling. This tooling is compatible with optical devices of similar sizes, avoiding the need to re-make corresponding tooling equipment according to materials of different sizes, different positions, and different solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0011] Figure 1 This is a schematic diagram of the structure of the coupling positioning tooling of the optical module PCB and the optical device assembly of the utility model;

[0012] Figure 2 yes Figure 1 A schematic diagram of the structure of a manual grasping and positioning optical device assembly;

[0013] Figure 3 yes Figure 2 A perspective view of the left side parts of the manual grasping and positioning optical device assembly;

[0014] Figure 4 yes Figure 2 Schematic diagram of the component structure of the forward push column plate;

[0015] Figure 5 yes Figure 2 A schematic diagram of the component structure of the slider 17;

[0016] Figure 6 yes Figure 2 A schematic structural diagram of a sheet gripper 23;

[0017] Figure 7 yes Figure 2 A schematic structural diagram of an optical device limiting connection block 24;

[0018] Figure 8 It is a structural diagram of the PCB test board;

[0019] Fig. 9 yes Figure 1 A schematic diagram of the structure of the track control and track making platform 13;

[0020] In the figure: 1 bottom plate, 2 lifting slide, 3 platform adapter plate, 4 slide adapter plate, 5 cantilever slide, 6 manual rotating slide, 7 angle rotation controller, 8 T-shaped cantilever plate, 9 limit bolt, 10 positioning optical device grabbing assembly, 11 optical device grabbing positioner, 12 PCB board, 13 track control platform, 14 hand-cranked moving alignment slide, 15 PCB positioning rack, 16 machine base, 17 slider, 18 forward push column plate, 19 manual retraction rod, 20 spring, 21 separate swing plate, 22 limit column, 23 sheet clamp, 24 optical device limit connection block, 25 PCB test board. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 9In the exemplary preferred embodiment described below, a coupling positioning tool for an optical module PCB and an optical device assembly includes: an XYZ three-axis manual displacement lifting slide 2 fixed on a base plate 1 in a plug-in manner, the lifting slide 2 is connected to a platform adapter plate 3 and a slide adapter plate 4 by screws, a cantilever slide 5 with a ┎-shaped structure is interlocked through a sunken step at the tail end of the slide adapter plate 4, and is slidably connected to a manual rotating slide 6, and the manual rotating slide 6 constrains an angle rotation controller 7 with a semicircular arc limiter under the step body through the bottom step body of the rectangular body, and the angle rotation controller 7 is connected to an optical device grabbing and locating device 11 through circumferential bolts, and the optical device grabbing and locating device 11 and a PCB positioning frame 15 fixed on the base plate 1 in a plug-in manner under its cantilever together constitute a coupling positioning tool for an optical module PCB and an optical device assembly.

[0022] In the embodiments described below:

[0023] The platform adapter plate 3 is fixed on the base of the lifting slide 2 by two parallel vertical plates, and the U-shaped opening grooves at both ends of the base are fixed on the bottom plate 1 by bolts.

[0024] The lifting slide 2 adjusts its XYZ displacement through a three-axis manual rotator; the direction of the XYZ axis of the three-axis manual rotator is based on the center of the optical device and the bottom plate is manually rotated in the XY direction to rotate along the XY plane.

[0025] Furthermore, one end of the platform adapter plate 3 is connected to the cantilever of the cantilever slide 5 through a rotating shaft, and the other end is fixedly connected to the T-shaped cantilever plate 8 on the optical device grabbing positioner 11 through the circumferential bolts on the bottom base plate of the angle rotation controller 7.

[0026] A limiting bolt 9 is disposed on the outer end surface of the T-shaped cantilever plate 8, and a T-shaped sliding groove for slidingly assembling the optical device gripper slider is formed below the T-shaped cantilever plate 8.

[0027] The cantilever slide 5 is fixed above the manual angle rotation controller 7 by threads, and the manual rotation slide 6 controls the rotation angle of the angle rotation controller 7 through a handle, thereby driving the optical device grasping positioner 11 of the positioning optical device grasping assembly 10 to rotate.

[0028] The PCB positioning rack 15 includes: a track control and rail making platform 13 for conveying the PCB board 12, and a hand-cranked movable alignment slide 14 supporting and connecting the track control and rail making platform 13 and the machine base 16, wherein a through groove for placing the PCB board and the PCB test board is fixed on the track control and rail making platform 13, and the optical device is fixed by the thin film clamp 23 and then placed in, and after being placed in, it is limited by screwing in the side with a limit screw.

[0029] The control rail platform 13 is connected to a device for signal transmission effect via an optical fiber behind the test board thereon to detect whether the optical device and the chip on the PCB are in the best position.

[0030] The optical device positioning grasping assembly 10 comprises: a rectangular body-connected cone 21 with two-wing sliders 17 on the top, a thin film clamp 23 and an optical device grasping locator 11, wherein the two-wing sliders 17 are mirror-symmetrical to each other and are screwed and fixed through four threaded holes.

[0031] Furthermore, a forward push column plate 18 fixedly connected to a manual retraction rod 19 is formed on the bottom platform of the groove between the two wing slides 17, and stepped spring holes symmetrically distributed in a matrix are formed on both sides of the rectangular body-connected cone 21 below the cantilever body of the two wing sliders 17, and each spring hole is equipped with a spring 20.

[0032] The swing plates 21 are symmetrically separated on both sides of the spacer below the forward push column flat plate 18. The swing plates 21 are provided with limit columns, and the two separate swing plates 21 are connected to the sheet gripper 23 through the optical device limit connection blocks 24 with hole Z-shaped bridge bosses.

[0033] Furthermore, spring-inserted limit posts 22 are built into the through holes of the swing plates 21 on both sides of the chamber, and the two swing plates 21 on the side of the swing plate 21 with the chamber, which is close to the chamber, move inward around the limit posts 22 and are subjected to force.

[0034] Furthermore, the sheet clamp 23 is provided with a groove claw that is consistent with the outer structure of the optical device and is used to limit the position of the optical device. The position of the optical device can be completely positioned through the optical device limiting connecting block 24 and the clamping sheet.

[0035] There is a forward-pushing column plate 18 between the two swinging swinging plates 21, which can move forward and backward. When the forward-pushing column plate 18 moves forward toward the spring side, the upper part of the swinging plate 21 will move outward and receive force, and the corresponding retraction rod 19 will move outward. If the retraction rod 21 is manually pushed back, the swinging plate 21 will return to the initial state. In this way, the two clamping sheets of the sheet clamping device 23 stuck under the two swinging plates 21 will open and close accordingly to clamp the optical device.

[0036] The positioning optical device grabbing assembly 10 is adjusted in the XYZ and rotation directions by the joint action of the lifting slide 2, the cantilever slide 5, and the manual rotating slide 6. Through the adjustment, the optical device fixed by the positioning optical device grabbing assembly 10 and the PCB board can be adjusted to a relatively parallel position, so that the light path can be vertically hit on the chip of the PCB board through the refraction of the optical device. This process can be monitored by the PCB test board 25 connected to the back of the PCB board: when approaching the predetermined position, the device connected to the PCB test board 25 will display better images and parameters. The optical device and the PCB board can be placed in the correct relative position through manual adjustment by the operator, and then the operator glues the two together. Finally, the optical device grabbing assembly 10 can be unlocked by pushing the forward column flat plate 18: the optical device is released. Then the optical device grabbing assembly 10 is removed by each slide, and the combination of the optical device and the PCB board can be taken out.

[0037] Furthermore, during the installation of the PCB and PCB test board: the PCB test board positioning and track control platform 13 can adjust its angle by manually swinging the slide 14. The positioning optical device grabbing assembly 10 is assembled first, and then the whole is placed on the optical device. At this time, the groove of the Z-shaped optical device limiting connection block 24 with a groove limit and the shape of the optical device are nested; then, the column plate 18 is pushed forward to lock the sheet clamp 23 inward, and the clamping and fixing of the optical device can be completed. Push the positioning optical device grabbing assembly 10 after clamping and fixing into the groove of the T-shaped cantilever plate 8, and then tighten the limit screw 9 to complete the limiting of the positioning optical device grabbing assembly 10. Subsequently, the position of the optical device and the PCB board can be adjusted by twisting the lifting slide 2 and the manual rotating slide 6. Whether the optical device and the PCB board are in a relatively correct position can be judged by the quality of the parameters of the equipment connected to the PCB test board. When the optimal parameters are obtained, a special glue is applied to the gap of the PCB board for preliminary fixation; then, the manual retraction rod 19 is pressed in to swing the sheet clamp 23 outwards: the optical device grabbing positioner 11 is released. At this time, the optical device and PCB assembly that have been glued can be removed, and the coupling work is successfully completed.

[0038] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A coupling and positioning tool for an optical module PCB and an optical device assembly, comprising: An XYZ three-axis manual displacement lifting slide (2) fixed on a base plate (1) in a plug-in manner is characterized in that: the lifting slide (2) is connected to a platform adapter plate (3) and a slide adapter plate (4) by screws, and a cantilever slide (5) with a ┎-shaped structure is interlocked through a sunken step at the tail end of the slide adapter plate (4) and is slidably connected to a manual rotating slide (6). The manual rotating slide (6) constrains an angle rotation controller (7) with a semicircular arc limiter under the step body through a step body at the bottom of a rectangular body, and the angle rotation controller (7) is connected to an optical device grabbing locator (11) through circumferential bolts. The optical device grabbing locator (11) and a PCB positioning frame (15) fixed on the base plate (1) in a plug-in manner under its cantilever together constitute a coupling positioning tool for an optical module PCB and an optical device assembly.

2. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 1, characterized in that: The platform adapter plate (3) is fixed to the base of the lifting slide (2) via two parallel vertical plates, and the U-shaped opening grooves at both ends of the base are fixed to the bottom plate (1) via bolts.

3. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 2, characterized in that: One end of the platform adapter plate (3) is connected to the cantilever of the cantilever slide (5) via a rotating shaft, and the other end is fixedly connected to the T-shaped cantilever plate (8) on the optical device grabbing positioner (11) via circumferential bolts on the bottom base plate of the angle rotation controller (7).

4. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 3, characterized in that: A limiting bolt (9) is provided on the outer end surface of the T-shaped cantilever plate (8), and a T-shaped slide groove for slidingly assembling an optical device gripper slider is formed below the T-shaped cantilever plate (8).

5. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 1 or 2, characterized in that: The cantilever slide (5) is fixed to the top of the manual angle rotation controller (7) by means of threads, and the manual rotation slide (6) controls the rotation angle of the angle rotation controller (7) by means of a handle, thereby driving the optical device grabbing positioner (11) of the positioning optical device grabbing assembly (10) to rotate.

6. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 5, characterized in that: The positioning optical device grasping assembly (10) comprises: a rectangular body-connected cone with a slider (17) at the top, a thin film clamp (23) and an optical device grasping positioner (11), wherein the two wings of the slider (17) are mirror-symmetrical to each other, and the two pieces are screw-connected and fixed via four threaded holes.

7. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 1, characterized in that: The PCB positioning rack (15) comprises: a track control platform (13) for conveying a PCB board (12), and a hand-cranked movable alignment slide (14) supporting and connecting the track control platform (13) and a machine base (16), wherein a through slot for placing a PCB board and a PCB test board is fixed on the track control platform (13), and an optical device is fixed by a sheet gripper (23) and then placed in the platform. After placement, the optical device is limited by screwing a limit screw into the side.

8. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 7, characterized in that: A forward push column plate (18) fixedly connected to a manual retraction rod (19) is formed on the groove bottom platform between the two wings of the slider (17), and stepped spring holes symmetrically distributed in a matrix are formed on both sides of the rectangular body-connected cone below the cantilever body of the slider (17), and each spring hole is equipped with a spring (20).

9. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 8, characterized in that: A separate swing plate (21) is symmetrically provided on both sides of a spacer below the forward push column plate (18), a limit column is provided on the separate swing plate (21), and the two separate swing plates (21) are connected to the sheet gripper (23) via an optical device limit connection block (24) with a perforated Z-shaped bridge boss.

10. The optical module PCB and optical device assembly coupling and positioning tool as claimed in claim 9, characterized in that: The sheet clamp (23) is provided with a groove clamping claw which is consistent with the appearance structure of the optical device and is used to limit the position of the optical device, and the position of the optical device is positioned through the optical device limiting connecting block (24) and the clamping sheet.

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