Optical module adapter assembly positioning fixture

Abstract

This utility model discloses an optical module adapter assembly positioning fixture, including a substrate, a positioning jig body, and a first positioning mechanism. The positioning jig body has interconnected optical module positioning slots and end positioning slots along a first direction. The optical module positioning slots accommodate the optical module housing and the adapter, and provide positioning references in the first and second directions based on the slot edges, achieving initial positioning of the optical module housing and the adapter. The first positioning mechanism includes a first positioning block, a positioning pin, and a first compression spring. Under the action of the first compression spring, the positioning pin is inserted into the corresponding positions of the adapter and the optical module housing, achieving coaxial precision positioning. This structure ensures the concentricity and tight fit of the optical module housing and the adapter during assembly, improving the precision of the assembly positioning. Furthermore, this assembly positioning fixture can avoid errors caused by repeated positioning, improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of optical communication equipment manufacturing technology, and in particular to an optical module adapter assembly and positioning fixture. Background Technology

[0002] With the rapid development of technologies such as 5G communication, data centers, and cloud computing, the demand for optical modules—the core component of optical communication networks and a crucial infrastructure for information transmission—continues to grow, placing higher demands on production efficiency and product quality. An optical module typically consists of a housing and an adapter. The adapter, as a key component for photoelectric signal conversion, is used to convert optical signals into electrical signals or vice versa. During the manufacturing process of an optical module, the adapter must be precisely installed at the end of the housing to ensure accurate positioning and efficient, stable conversion between optical and electrical signals. After positioning, the optical module and adapter assembly proceed to processes such as dispensing, curing, and optical inspection, which directly affect the performance and yield of the optical module.

[0003] Currently, the process of assembling the adapter onto the end of the optical module housing still mainly relies on manual operation. Operators need to manually install the optical module into a special fixture for fixation, then perform preliminary alignment of the adapter by sight and experience, and then transfer it to stations such as dispensing, curing, and optical inspection to complete the corresponding processes.

[0004] The above-mentioned manual positioning and assembly methods have obvious shortcomings: (1) Manual placement and visual alignment are difficult to ensure the concentricity of the adapter and the optical module's optical port. Slight deviations will lead to increased optical path loss and even scratches on the end face, which will seriously affect the product's optical performance and yield. At the same time, manual operation is highly volatile. Different operators or the same operator in different states will have different results, resulting in unstable product quality and poor consistency.

[0005] (2) On the production line, the optical module needs to go through multiple stations such as dispensing, curing, and testing. In the traditional assembly method, the optical module needs to be repositioned at each station, which will further amplify the cumulative error and make it difficult to ensure the reliable implementation of subsequent high-precision processes (such as visual inspection of optical port dispensing quality, fiber optic connector insertion and removal testing, etc.).

[0006] Therefore, there is an urgent need for a tooling that can be applied to automated production lines to achieve high-precision assembly and positioning of optical module adapters, in order to overcome problems such as insufficient accuracy of manual alignment and accumulation of repeated positioning errors. Utility Model Content

[0007] To solve the above-mentioned technical problems, this utility model provides an optical module adapter assembly and positioning fixture, comprising: substrate; A positioning fixture body is disposed on the substrate. The positioning fixture body is provided with an optical module positioning groove and an end positioning groove that are interconnected along a first direction. The optical module positioning groove is used to accommodate the optical module housing and the adapter, and provides a positioning reference for the optical module housing and the adapter in a first direction and a second direction based on its groove edge. The first direction and the second direction are perpendicular to each other. A first positioning mechanism is disposed in the end positioning groove. The first positioning mechanism includes a first positioning block, a positioning pin, and a first compression spring. The positioning pin extends along a first direction, with one end connected to the first positioning block and the other end facing the optical module positioning groove. The two ends of the first compression spring abut against the first positioning block and the groove wall of the end positioning groove on the side away from the optical module positioning groove, respectively.

[0008] In one embodiment of the present invention, the first positioning mechanism further includes a guide rod, which is installed in the end positioning groove along the first direction, and the first positioning block is slidably sleeved on the guide rod.

[0009] In one embodiment of this utility model, the front end of the positioning pin is provided with a guide angle, which is used to guide the positioning pin to be inserted into the adapter.

[0010] In one embodiment of this utility model, the positioning pin is further provided with a positioning post and a positioning protrusion. The positioning post is used to position the chip inside the optical module housing, and the positioning protrusion is used to position the adapter slot.

[0011] In one embodiment of this utility model, an unlocking mechanism is further included. The unlocking mechanism includes a linear module and a pin. The linear module is disposed on the substrate and is fixedly connected to the pin for driving the pin to move along a first direction. The first positioning block has a slot extending along a first direction, and the pin is inserted into the slot along a third direction, wherein the third direction is perpendicular to the first direction.

[0012] In one embodiment of this utility model, a second positioning mechanism is further included. The second positioning mechanism includes a second positioning block and a second compression spring. A side positioning groove is provided on the positioning fixture body along the second direction. The side positioning groove is connected to the optical module positioning groove. The second positioning block is disposed in the side positioning groove. One end of the second compression spring abuts against the second positioning block, and the other end abuts against the groove wall of the side positioning groove.

[0013] In one embodiment of the present invention, the second positioning mechanism further includes a limiting plate, a first limiting groove is provided on the limiting plate, a second limiting groove is provided on the second positioning block, the limiting plate covers the second positioning block and is fixedly connected to the positioning fixture body, and the second limiting groove and the first limiting groove overlap to form an movable window, which is used to limit the movable range of the second positioning block along the second direction.

[0014] In one embodiment of the present invention, the positioning fixture body is provided with a first expansion slot and a second expansion slot, the first expansion slot and the second expansion slot are respectively disposed on one side of the optical module positioning slot and are respectively connected to the optical module positioning slot.

[0015] In one embodiment of this utility model, the positioning pin is fixedly connected to the end of the first positioning block facing the positioning groove of the optical module.

[0016] In one embodiment of the present invention, the end of the first positioning block facing the optical module positioning groove is provided with two mounting holes along the first direction, and the first positioning block is also provided with a tension spring receiving groove, the mounting holes being connected to the tension spring receiving groove; The two positioning pins are inserted into their respective mounting holes, and the positioning pins are rotatably connected to the first positioning block via a rotating shaft. The tail of the positioning pin extends into the tension spring receiving groove, and the tails of the two positioning pins are connected by a tension spring.

[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: This invention uses a positioning slot to position the optical module housing and the adapter in a first direction and a second direction, enabling the optical module housing and the adapter to achieve initial positioning. The first positioning mechanism includes a first positioning block, a positioning pin, and a first compression spring. Under the action of the first compression spring, the positioning pin is inserted into the corresponding position of the adapter and the optical module housing, thereby achieving precise positioning of the adapter relative to the optical module housing. This facilitates the adapter to be transferred to the subsequent workstation for corresponding operations along with the positioning fixture.

[0018] The above structure enables initial and fine positioning of the optical module housing and adapter, ensuring concentricity and tight fit between the adapter and the optical module housing during assembly. This avoids optical path loss and end-face scratches caused by manual alignment, while also improving the stability and consistency of the assembly process.

[0019] The optical module only needs to be clamped once on this fixture to complete all processes such as dispensing, curing and testing, without the need for repositioning. This not only reduces errors, but also makes the entire assembly process more accurate and stable.

[0020] Furthermore, this structural design allows the optical module adapter assembly and positioning fixture to be easily applied to automated production lines, enabling smooth connection and continuous operation between workstations, thereby significantly improving production speed and assembly quality, and reducing errors and instabilities caused by manual operation. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the optical module adapter assembly and positioning fixture of Embodiment 1 of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the optical module adapter assembly and positioning fixture of Embodiment 1 of this utility model. Figure 2 ; Figure 3 yes Figure 1 An enlarged view at point A; Figure 4 This is a schematic diagram of the optical module adapter assembly and positioning fixture of Embodiment 2 of this utility model. Figure 1 ; Figure 5 This is a schematic diagram of the optical module adapter assembly and positioning fixture of Embodiment 2 of this utility model. Figure 2 ; Figure 6 yes Figure 4 Enlarged diagram at point B.

[0023] Explanation of reference numerals in the accompanying drawings: 100, base plate; 200, positioning fixture body; 210, optical module positioning slot; 220, end positioning slot; 230, side positioning slot; 240, first expansion slot; 250, second expansion slot; 300, first positioning mechanism; 310, first positioning block; 311, slot; 312, tension spring receiving slot; 320, positioning pin; 321, guide angle; 322, positioning post; 323, positioning protrusion; 330, guide rod; 340, first compression spring; 350, rotating shaft; 360, tension spring; 400, unlocking mechanism; 410, cylinder; 420, pin; 500, second positioning mechanism; 510, second positioning block; 511, second limiting slot; 520, second compression spring; 530, limiting plate; 531, first limiting slot; 600, optical module housing; 700, adapter. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example 1:

[0025] See Figures 1 to 6 As shown, this utility model provides an optical module adapter assembly and positioning fixture, including a substrate 100, a positioning fixture body 200, and a first positioning mechanism 300.

[0026] The positioning fixture body 200 is fixedly mounted on the substrate 100, and interconnected optical module positioning grooves 210 and end positioning grooves 220 are sequentially formed on it along a first direction. The optical module positioning groove 210 accommodates the optical module housing 600 and the adapter 700, and its edge serves as a positioning reference, providing limiting positioning for the optical module housing 600 and the adapter 700 in the first and second directions. The first and second directions are perpendicular to each other. Through the optical module positioning groove 210, the optical module housing 600 can achieve initial positioning, providing an accurate foundation for the subsequent fine positioning of the adapter 700. It should be noted that in the initial state, after the optical module housing 600 and the adapter 700 are placed into the optical module positioning groove 210, although they are inserted, they are still loose and the connection is not firm due to the lack of adhesive fixation. Therefore, after the optical module housing 600 and the adapter 700 are placed in the optical module positioning slot 210, the optical module housing 600 needs to be initially positioned first, and then the adapter 700 inserted into the optical module housing 600 is precisely positioned using the optical module housing 600 as a reference.

[0027] A first positioning mechanism 300 is disposed within an end positioning groove 220 and includes a first positioning block 310, a positioning pin 320, and a first compression spring 340. The positioning pin 320 extends along a first direction, with one end connected to the first positioning block 310 and the other end facing the optical module positioning groove 210. In this embodiment, the positioning pin 320 is fixedly connected to the first positioning block 310. The first compression spring 340 is disposed between the first positioning block 310 and the groove wall of the end positioning groove 220, with its two ends abutting against the first positioning block 310 and the groove wall on the side away from the optical module positioning groove 210, respectively. When compressed, the first compression spring 340 continuously applies elastic force to the first positioning block 310, causing the positioning pin 320 to move towards the optical module positioning groove 210.

[0028] During assembly and use, the optical module housing 600 and adapter 700 are first placed into the optical module positioning slot 210, and initial positioning is achieved by using the slot edge for positioning. Subsequently, the first compression spring 340 pushes the first positioning block 310 and positioning pin 320 forward along the first direction, so that the positioning pin 320 is smoothly inserted into the connection part of the optical module housing 600 and adapter 700 under the guidance of the guide angle 321, achieving precise concentric positioning of the two. At this time, the optical module housing 600 and adapter 700 are in a stable positioning state and can be transferred to subsequent stations along with the positioning fixture body 200 for operation at multiple stations such as dispensing, curing, and optical inspection.

[0029] After the optical module assembly completes all assembly processes, simply pull the first positioning block 310 backward by external force, and the positioning pin 320 can be removed from the adapter 700, achieving quick unlocking and facilitating the removal of the assembled optical module assembly.

[0030] Through the above structural design, the optical module adapter assembly and positioning fixture of this utility model can achieve a combination of initial positioning and fine positioning after a single clamping, ensuring that the optical module housing 600 and the adapter 700 remain concentric and tightly fitted throughout the entire process, avoiding errors and end-face scratches caused by manual alignment. Simultaneously, the spring force provides flexible insertion force, reducing mechanical impact and ensuring smooth and reliable assembly. This fixture has a simple structure, high positioning accuracy, and can be directly embedded into automated production lines, enabling continuous flow and standardized operation between workstations, significantly improving production efficiency and product consistency.

[0031] See Figure 2 As shown, the first positioning mechanism 300 also includes a guide rod 330. The guide rod 330 is installed in the end positioning groove 220 along the first direction. The first positioning block 310 is slidably sleeved on the guide rod 330. Due to the constraint of the guide rod 330, the first positioning block 310 can maintain stable linear motion when moving along the first direction, avoiding a decrease in the insertion accuracy of the positioning pin 320 due to offset.

[0032] See Figure 2 As shown, the front end of the positioning pin 320 is machined into a guide angle 321 with a certain bevel. When the first positioning block 310 moves forward under the drive of the unlocking mechanism 400, the guide angle 321 can play a guiding role when it contacts the adapter 700, so that the positioning pin 320 gradually transitions and inserts into the adapter 700, avoiding the end face of the positioning pin 320 directly pressing against the edge of the adapter, thereby preventing scratches caused by hard impact or jamming caused by excessive insertion force.

[0033] In addition, the upper surface of the positioning pin 320 may also be provided with a positioning post 322 and a positioning protrusion 323. The positioning post 322 is used to cooperate with the chip position inside the optical module housing 600 to achieve precise positioning of the chip. The positioning protrusion 323 limits the slot of the adapter 700, thereby ensuring that the adapter 700 is assembled in place.

[0034] Through the above structural design, the positioning pin 320 can be smoothly inserted into the optical module housing 600 and the adapter 700, and can also achieve multi-point limiting at the final position, thereby further improving the concentricity of the optical module housing 600 and the adapter 700, and ensuring the subsequent assembly accuracy and stability.

[0035] See Figure 4 As shown, the unlocking mechanism 400 includes a linear module and a pin 420. The linear module is disposed on the base plate 100. The movable part of the linear module is fixedly connected to the pin 420 to drive the pin 420 to move along a first direction. Specifically, in this embodiment, the linear module uses a cylinder 410. The cylinder 410 is fixedly mounted on the base plate 100, and its telescopic rod is fixedly connected to the pin 420. The pin 420 is arranged along a third direction perpendicular to the telescopic direction of the cylinder 410. The cylinder 410 drives the pin 420 to reciprocate along the first direction through its telescopic movement. A slot 311 is formed on the first positioning block 310 along the first direction. The slot 311 is elongated, and the pin 420 is inserted into the slot 311. The third direction is perpendicular to both the first and second directions.

[0036] When the cylinder 410 pushes forward toward the adapter 700, the pin 420 moves along the slot 311 toward the end closest to the adapter 700. At this point, it no longer contacts the far end of the slot 311 away from the adapter 700, thus the pin 420 no longer rigidly pushes against the first positioning block 310. The first positioning block 310 is then driven forward entirely by the elastic force of the first compression spring 340, allowing the positioning pin 320 to be flexibly inserted into the optical module housing 600 and the adapter 700, achieving reliable positioning of the optical module housing 600 and the adapter 700. This flexible insertion avoids the impact and deviation caused by the cylinder 410 directly pushing the positioning block 310, effectively controlling the insertion force and ensuring the concentricity and tight fit of the adapter 700 and the optical module housing 600 during assembly.

[0037] When cylinder 410 pulls backward away from adapter 700, pin 420 is located at the far end of slot 311 away from adapter 700 and abuts against the end slot wall, pulling the first positioning block 310 backward, causing positioning pin 320 to exit the optical module housing 600 and adapter 700, thus achieving positioning unlocking. It should be noted that during the assembly process of optical module housing 600 and adapter 700, positioning pin 320 remains inserted into optical module housing 600 and adapter 700 for most processes to ensure that the tooling can be transferred with the optical module to various workstations such as dispensing, curing, and optical inspection. Only after all processes are completed does cylinder 410 drive pin 420 to exit positioning pin 320 from optical module housing 600 and adapter 700, achieving final unlocking and facilitating the removal of the assembled optical module.

[0038] The cooperation between pin 420 and slot 311 avoids the impact and positional deviation caused by cylinder 410 directly pushing the first positioning block 310, effectively controlling the insertion force and ensuring the concentricity and tight fit between adapter 700 and optical module housing 600 during assembly. Simultaneously, the combination of forced withdrawal and flexible insertion modes not only improves the stability and consistency of unlocking and positioning but also allows the tooling to better adapt to automated production cycles, reducing human intervention and improving overall assembly efficiency and product yield.

[0039] like Figure 1 As shown, the optical module adapter assembly positioning fixture also includes a second positioning mechanism 500. The second positioning mechanism 500 includes a second positioning block 510 and a second compression spring 520. A side positioning groove 230 extending along a second direction is provided on the side of the positioning fixture body 200 and communicates with the optical module positioning groove 210. The second positioning block 510 is disposed within the side positioning groove 230. The second positioning block 510 cooperates with the second compression spring 520. The second compression spring 520 is disposed along the second direction, with one end abutting against the second positioning block 510 and the other end abutting against the groove wall of the side positioning groove 230.

[0040] The second positioning block 510 can extend and retract within a certain range along the second direction under the elastic force of the second compression spring 520, thereby clamping and limiting the side of the optical module housing 600. Through the first-direction positioning provided by the first positioning mechanism 300 and the lateral limiting in the second direction provided by the second positioning mechanism 500, the optical module housing 600 obtains multi-directional stable constraints in the fixture, which improves the positioning accuracy and prevents the optical module from shifting during subsequent processes (such as dispensing, curing, and optical inspection), thereby improving the assembly accuracy of the optical module.

[0041] Furthermore, the second positioning mechanism 500 also includes a limiting plate 530. A second limiting groove 511 is formed on the upper surface of the second positioning block 510. A corresponding first limiting groove 531 is formed on the limiting plate 530. The limiting plate 530 covers the second positioning block 510 and is fixed to the positioning fixture body 200. The first limiting groove 531 and the second limiting groove 511 overlap to form an active window. The first limiting groove 531 and the second limiting groove 511 extend along a second direction, thus constraining the movement range of the second positioning block 510 within the active window range.

[0042] See Figure 1 As shown, the positioning fixture body 200 is provided with a first expansion slot 240 and a second expansion slot 250. The first expansion slot 240 and the second expansion slot 250 are respectively arranged on one side of the optical module positioning slot 210 and are both connected to the optical module positioning slot 210. The first expansion slot 240 and the second expansion slot 250 are arranged at intervals between each other.

[0043] Through the above structural design, the first expansion slot 240 and the second expansion slot 250 provide space for operators or automated robots to pick up and put in, so that the optical module housing 600 and the adapter 700 can be quickly put into or taken out in the positioning fixture, improving the convenience of operation and assembly efficiency.

[0044] In addition, the design of the first expansion slot 240 and the second expansion slot 250 avoids using the long side as the main reference when positioning the optical module housing 600, thereby effectively eliminating the positioning deviation caused by the straightness error of the long side and ensuring the positioning accuracy and assembly stability of the housing in the fixture.

[0045] See Figure 3 As shown, the positioning pin 320 is fixedly connected to the end of the first positioning block 310 facing the optical module positioning slot 210 by bolts or other fixed connection methods. The positioning pin 320 and the first positioning block 310 form a rigid connection. During the use of the fixture, the movement of the positioning pin 320 depends entirely on the movement of the first positioning block 310, thus avoiding deviations caused by relative rotation or loosening. Two positioning pins 320 can be configured, spaced apart and fixedly connected to the first positioning block 310, thereby ensuring the multi-point positioning accuracy and assembly stability of the adapter 700 and the optical module housing 600. Example 2:

[0046] See Figures 4 to 6 As shown, this embodiment 2 provides an optical module adapter assembly fixture, which also includes a substrate 100, a positioning fixture body 200, a first positioning mechanism 300, a second positioning mechanism 500, and an unlocking mechanism 400.

[0047] The main difference between this embodiment 2 and embodiment 1 lies in the structure of the first positioning mechanism 300. As in embodiment 1, the first positioning mechanism 300 also includes a first positioning block 310, a positioning pin 320, a guide rod 330, and a first compression spring 340, but the positioning pin 320 and the first positioning block 310 are not fixedly connected.

[0048] See Figure 4 and Figure 5 As shown, the first positioning block 310 has two mounting holes sequentially formed along the first direction at its end facing the optical module positioning slot 210. A tension spring receiving slot 312 is formed inside the first positioning block 310, and the two mounting holes communicate with the tension spring receiving slot 312. Two positioning pins 320 are respectively inserted into their corresponding mounting holes and are rotatably connected to the first positioning block 310 via a rotating shaft 350, allowing the positioning pins 320 to rotate around the rotating shaft 350 within a certain range. The tail portion of the positioning pin 320 extends into the tension spring receiving slot 312 and is connected to each other within the slot by a tension spring 360. With the tension of the tension spring 360, the two positioning pins 320 are normally closed towards each other, but when the adapter 700 is inserted, they can open within the error range to form a certain flare angle.

[0049] During assembly, the positioning pin 320 moves toward the adapter 700 along the first direction, driven by the unlocking mechanism 400 or an external force, along with the first positioning block 310. When the front end of the positioning pin 320 contacts the adapter 700, the two positioning pins 320 can generate a certain outward angle under the action of the tension spring 360 to compensate for minor deviations in the assembly position. Through this outward movement, the positioning pin 320 exerts a moderate lateral force on the adapter 700 during clamping, making it less likely for the adapter 700 to shift when it is limited. When the first positioning block 310 continues to push the positioning pin 320 to the target position, the positioning pin 320, under the rebound action of the tension spring 360, stably limits the adapter 700 to the end of the optical module housing 600, thereby achieving concentric positioning of the two and improving the stability and consistency of subsequent processes (such as dispensing, curing, optical inspection, etc.) of the adapter 700 and the optical module housing 600.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An optical module adapter assembly positioning fixture, characterized by: include substrate; A positioning fixture body is disposed on the substrate. The positioning fixture body is provided with an optical module positioning groove and an end positioning groove that are interconnected along a first direction. The optical module positioning groove is used to accommodate the optical module housing and the adapter, and provides a positioning reference for the optical module housing and the adapter in a first direction and a second direction based on its groove edge. The first direction and the second direction are perpendicular to each other. A first positioning mechanism is disposed in the end positioning groove. The first positioning mechanism includes a first positioning block, a positioning pin, and a first compression spring. The positioning pin extends along a first direction, with one end connected to the first positioning block and the other end facing the optical module positioning groove. The two ends of the first compression spring abut against the first positioning block and the groove wall of the end positioning groove on the side away from the optical module positioning groove, respectively.

2. The optical module adapter assembly positioning fixture of claim 1, wherein: The first positioning mechanism further includes a guide rod, which is installed in the end positioning groove along the first direction, and the first positioning block is slidably sleeved on the guide rod.

3. The optical module adapter assembly and positioning fixture according to claim 1, characterized in that: The positioning pin has a guide angle at its front end, which is used to guide the positioning pin into the adapter.

4. The optical module adapter assembly positioning fixture of claim 1, wherein: The positioning pin is also provided with a positioning post and a positioning protrusion.

5. The optical module adapter assembly positioning fixture of claim 1, wherein: It also includes an unlocking mechanism, which includes a linear module and a pin. The linear module is disposed on the substrate and is fixedly connected to the pin, and is used to drive the pin to move along the first direction. The first positioning block has a slot extending along a first direction, and the pin is inserted into the slot along a third direction, wherein the third direction is perpendicular to the first direction and the second direction respectively.

6. The optical module adapter assembly positioning fixture of claim 1, wherein: It also includes a second positioning mechanism, which includes a second positioning block and a second compression spring. The positioning fixture body is provided with a side positioning groove along the second direction. The side positioning groove is connected to the optical module positioning groove. The second positioning block is disposed in the side positioning groove. One end of the second compression spring abuts against the second positioning block, and the other end abuts against the groove wall of the side positioning groove.

7. The optical module adapter assembly and positioning fixture according to claim 6, characterized in that: The second positioning mechanism further includes a limiting plate, on which a first limiting groove is provided, and on which a second limiting groove is provided, the limiting plate covers the second positioning block and is fixedly connected to the positioning fixture body. The second limiting groove and the first limiting groove overlap to form an movable window, which is used to limit the movable range of the second positioning block along the second direction.

8. The optical module adapter assembly positioning fixture of claim 1, wherein: The positioning fixture body is provided with a first expansion slot and a second expansion slot. The first expansion slot and the second expansion slot are respectively located on one side of the optical module positioning slot and are respectively connected to the optical module positioning slot.

9. The optical module adapter assembly positioning fixture of any one of claims 1 to 8, wherein: The positioning pin is fixedly connected to the end of the first positioning block facing the positioning slot of the optical module.

10. The optical module adapter assembly and positioning fixture according to any one of claims 1 to 8, characterized in that: The first positioning block has two mounting holes at its end facing the optical module positioning slot along the first direction, and the first positioning block also has a tension spring receiving slot, with the mounting holes communicating with the tension spring receiving slot. The two positioning pins are inserted into their respective mounting holes, and the positioning pins are rotatably connected to the first positioning block via a rotating shaft. The tail of the positioning pin extends into the tension spring receiving groove, and the tails of the two positioning pins are connected by a tension spring.

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