A high-precision positioning pluggable optical fiber array structure suitable for a CPO module

Abstract

The application relates to a light guide coupling technology, in particular to a high-precision positioning pluggable optical fiber array structure suitable for a CPO module, which comprises a PIN pin seat and an optical fiber connecting module, a notch is formed on the side of the central part of a PIN pin cover close to the PIN pin seat, and an optical fiber pressing block is arranged in the notch; the optical fiber pressing block and the optical fiber connecting module are connected through an elastic structure, and a locking structure is further arranged between the optical fiber connecting module and the PIN pin seat, the locking structure is used for tightly fixing the PIN pin body in a PIN pin pressing V groove formed in the PIN pin base after the optical fiber pressing block tightly fixes one end of a ribbon optical fiber in an optical fiber V groove formed in the PIN pin base. The elastic structure is used for pre-tightly fixing one end of the ribbon optical fiber in the optical fiber V groove through the optical fiber pressing block, the lower surface of the optical fiber pressing block and the two sides of the optical fiber V groove form an isosceles triangle, the three sides of the isosceles triangle respectively form three-point tangent relationships with single optical fibers in the ribbon optical fiber, and the mechanical stability and the optical path alignment precision are improved.

Description

Technical Field

[0001] The present invention relates to a light guide coupling technology, in particular to a pluggable optical fiber array structure suitable for high-precision positioning of a CPO module. Background Art

[0002] The application of pluggable fiber arrays in CPO (Co-Packaged Optics) modules is a key technology trend in the current high-speed optical interconnect field. It aims to address the power consumption, density, and signal integrity bottlenecks of traditional pluggable optical modules (such as QSFP-DD and OSFP) in ultra-high bandwidth scenarios. The following are its core application points and technical features:

[0003] Limitations of traditional pluggable modules: In switch chips exceeding 51.2T, pluggable optical modules consume excessive power and occupy a significant volume share. Furthermore, the surge in the number of channels in electrical interfaces (such as SerDes) complicates PCB routing. CPO (Computer-Oriented Optical Interface) solutions co-package the optical engine (OE) with the ASIC chip, shortening the electrical interconnect distance and reducing power consumption (possibly by 30%-50%). However, this requires addressing the high-density interconnection of optical interfaces.

[0004] The role of fiber arrays: As high-density, low-loss optical interconnect media, fiber arrays (such as MT ferrule multi-core connectors) enable efficient coupling between CPO modules and external optical fibers, supporting multi-channel (e.g., 16 / 32 / 64 channels) parallel transmission.

[0005] The present invention aims to provide a pluggable FA optical fiber array solution, which uses MT ferrule standard PIN needles as positioning pins to achieve high-precision alignment and repeatable plugging and unplugging. Summary of the Invention

[0006] The object of the present invention is to provide a pluggable optical fiber array structure suitable for high-precision positioning of CPO modules to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A pluggable optical fiber array structure suitable for high-precision positioning of CPO modules, comprising a PIN needle seat and an optical fiber connection module, wherein the PIN needle seat comprises a PIN needle seat cover and a PIN needle seat base fixedly connected to each other, and a PIN needle body is fixedly arranged between the PIN needle seat cover and the PIN needle seat base;

[0009] The optical fiber connection module includes a PIN pin cover and a PIN pin base distributed above and below, a notch is formed in the center of the PIN pin cover near the PIN pin seat, and an optical fiber pressing block is provided in the notch;

[0010] The optical fiber pressing block is connected to the optical fiber connection module via an elastic structure, and is used to pre-tighten one end of the ribbon optical fiber into the optical fiber V-groove formed on the PIN pin base through the optical fiber pressing block;

[0011] A locking structure is further provided between the optical fiber connection module and the PIN needle seat, and is used to fasten the PIN needle body into the PIN needle pressing V-groove formed on the PIN needle base after the optical fiber pressing block fastens one end of the ribbon optical fiber into the optical fiber V-groove formed on the PIN needle base;

[0012] The centers of the individual optical fibers in the optical fiber ribbon are connected to form a straight line, and the center of the PIN needle body is also on the straight line.

[0013] The above-mentioned high-precision positioning pluggable optical fiber array structure suitable for the CPO module: a plurality of combining bolts are arranged between the PIN pin pressure cover and the PIN pin base, the combining bolts detachably penetrate the PIN pin pressure cover and the PIN pin base, and one end of the combining bolt is threadedly connected to the top cap.

[0014] The above-mentioned pluggable optical fiber array structure suitable for high-precision positioning of CPO modules: the elastic structure includes two penetrating rods fixedly arranged on one side of the PIN pin pressure cover, one end of the penetrating rod is rotatably connected to one end of the hinge piece, and the other end of the hinge piece is rotatably connected to the optical fiber pressure block;

[0015] The two hinges are parallel to each other and form a parallelogram. An oblique arm is fixedly provided on the PIN needle base. One end of the oblique arm is rotatably connected to one end of a swing arm. The other end of the swing arm is rotatably connected to the optical fiber pressure block through a pin shaft fixedly provided on the optical fiber pressure block. A horizontal axis is fixedly provided on the oblique arm, and a tension spring is provided between the horizontal axis and the pin shaft.

[0016] The above-mentioned pluggable optical fiber array structure suitable for high-precision positioning of CPO modules: a movable cavity is formed on the optical fiber pressing block, a guide stud is provided in the movable cavity, and the upper portion of the guide stud is threadedly connected to the optical fiber pressing block;

[0017] The optical fiber pressing block is connected to the PIN needle pressing cover by a pressing piece, one end of which is located in the movable cavity and can slide vertically along the lower part of the guide stud in the movable cavity; a socket is provided on the PIN needle pressing cover, and the other end of the pressing piece is horizontally slidably engaged with the socket.

[0018] The pluggable optical fiber array structure suitable for high-precision positioning of the CPO module as described above: a cover plate notch is formed in the lower center of the PIN needle seat cover plate, and a bottom plate notch is formed in the upper center of the PIN needle seat bottom plate;

[0019] The bottom plate notch and the cover plate notch form a final tight seal;

[0020] A base positioning end is formed in the center of one end of the PIN needle base close to the PIN needle seat, and a pressure block positioning end is formed in the center of one end of the optical fiber pressure block close to the PIN needle seat;

[0021] The base positioning end and the pressing block positioning end form a final tightening end;

[0022] The final tightening end is adapted to the final tightening seal.

[0023] The above-mentioned pluggable optical fiber array structure suitable for high-precision positioning of CPO modules: a PIN needle positioning V-groove is formed on the bottom plate of the PIN needle seat, and the PIN needle body is pressed and fixed between the PIN needle positioning V-groove and the lower surface of the PIN needle seat cover plate, forming a three-point tangency;

[0024] A stop step is formed on the outer wall of the PIN needle body, and one side of the stop step is in close contact with the PIN needle seat.

[0025] As described above, the pluggable optical fiber array structure suitable for high-precision positioning of the CPO module: a wedge surface is formed on the upper portion of the positioning end of the pressure block, and when the PIN needle seat and the optical fiber connection module are fully connected, the wedge surface is completely located in the final tight seal.

[0026] The above-mentioned pluggable optical fiber array structure suitable for high-precision positioning of CPO modules: the locking structure includes a lock provided on the PIN pin pressure cover and a claw elastically and movably provided on the PIN pin seat cover;

[0027] The front end of the clamping claw forms a right-angled triangle portion, the inner side of the locking opening adjacent to the outer side is formed with a guide surface, and the side adjacent to the guide surface is provided with a vertical locking surface.

[0028] The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules as described above: the PIN needle seat cover is provided with a sliding cavity, and one end of the clamping claw is vertically slidably engaged with the sliding cavity;

[0029] A positioning bolt is detachably provided on the PIN seat cover, the positioning bolt passes through the sliding cavity, and the positioning bolt is fixed to the PIN seat cover by a locking nut threadedly connected at one end thereof;

[0030] A compression chamber is connected to the sliding chamber, one end of the claw is slidably engaged with the positioning bolt, and a compression spring is provided in the compression chamber. The compression spring is sleeved on the outer periphery of the positioning bolt, one end of the compression spring is in contact with the top wall of the compression chamber, and the other end is in contact with the claw.

[0031] Compared with the prior art, the present invention has the following advantages: an elastic structure is provided to pre-tighten one end of the optical fiber ribbon in the optical fiber V-groove using an optical fiber clamp; the lower surface of the optical fiber clamp and the two sides of the optical fiber V-groove together form an isosceles triangle; the three sides of the isosceles triangle respectively form a three-point tangent relationship with a single optical fiber in the optical fiber ribbon, thereby improving mechanical stability and optical path alignment accuracy.

[0032] After one end of the optical fiber ribbon is pre-tightened in the optical fiber V-groove, the PIN needle holder and the optical fiber connection module are connected. During the connection process, the PIN needle body fixed on the PIN needle holder is continuously inserted into the PIN needle pressing V-groove in the optical fiber connection module, and the optical fiber pressing block is continuously moved closer to the PIN needle base, so that the optical fiber ribbon is finally tightened between the lower surface of the optical fiber pressing block and the optical fiber V-groove.

[0033] The optical fiber clamp continuously approaches the PIN needle base, driving the PIN needle pressure cover to continuously move closer to the PIN needle base. After the PIN needle seat and the optical fiber connection module are fully connected, the completely close PIN needle pressure cover and PIN needle base press the PIN needle body between the PIN needle pressing V-groove and the lower surface of the PIN needle pressure cover. The lower surface of the PIN needle pressure cover and the two sides of the PIN needle pressing V-groove together form an isosceles triangle. The three sides of the isosceles triangle form a three-point tangent relationship with the PIN needle body respectively, completing the final tightening of the PIN needle body and improving the mechanical stability and optical path alignment accuracy.

[0034] In addition, with the help of the provided locking structure, after the PIN needle seat and the optical fiber connection module are fully connected, the two cannot be separated, thereby ensuring that the ribbon optical fiber and the PIN needle body remain completely tight.

[0035] In the present invention, since the optical fiber ribbon is pre-tightened in the optical fiber V-groove before the optical fiber connection module is fully connected to the PIN needle seat, it has a certain expansion and contraction clearance. When the PIN needle seat is fixed in position and can only be connected by the optical fiber connection module close to the PIN needle seat, even if the length of the optical fiber ribbon is insufficient, the length can be compensated by the optical fiber ribbon sliding and expanding and contracting in the optical fiber V-groove along its length direction, so as to prevent the optical fiber ribbon from being broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of a pluggable optical fiber array suitable for high-precision positioning of CPO modules.

[0037] Figure 2 This is a structural diagram of another aspect of the pluggable optical fiber array structure suitable for high-precision positioning of the CPO module.

[0038] Figure 3 This is a schematic diagram of the structure after the PIN needle cover is removed after the ribbon optical fiber is removed.

[0039] Figure 4 for Figure 3 Schematic diagram of the structure from another perspective.

[0040] Figure 5 For Figure 3 The schematic diagram of the structure is shown in Figure 1 after disassembling the top hat.

[0041] Figure 6 For Figure 5 The structural diagram of another position after removing the fitting bolts.

[0042] Figure 7 This is a schematic diagram of the structure after the optical fiber ribbon and PIN needle pressure cover are removed and the optical fiber pressing block and the lower pressing part are disassembled.

[0043] Figure 8 This is a schematic diagram of the structure after removing the ribbon optical fiber, PIN needle pressure cover, PIN needle base, and optical fiber pressure block.

[0044] Figure 9 This is a structural diagram after the PIN needle body is removed from the PIN needle pressing V-groove.

[0045] Figure 10 For Figure 9 Schematic diagram of the structure after removing the PIN needle base.

[0046] Figure 11 for Figure 10 Schematic diagram of the structure from another perspective.

[0047] Figure 12 For Figure 8 The structural diagram of another position after removing the PIN needle seat cover.

[0048] Figure 13 This is a schematic diagram of the structure after the claw, positioning bolt, compression spring, and locking nut are disassembled from the PIN needle seat.

[0049] Figure 14 for Figure 13 Schematic diagram of the structure from another perspective.

[0050] Figure 15 For Figure 13 Schematic diagram of the structure after being cut along the center line of the sliding cavity.

[0051] Figure 16 for Figure 15 Enlarged view of point A in the middle.

[0052] Figure: 1, PIN pin cover; 101, socket; 102, lock; 1021, guide surface; 1022, locking surface; 2, PIN pin base; 201, base positioning end; 202, optical fiber V-groove; 203, PIN pin pressing V-groove; 3, PIN pin seat cover; 301, cover notch; 302, sliding cavity; 3021, compression cavity; 4, PIN pin seat bottom plate; 401, bottom plate notch; 402, PIN pin Positioning V-groove; 5. Fiber optic clamp; 501. Clamp positioning end; 502. Wedge surface; 503. Movable cavity; 6. Ribbon optical fiber; 7. PIN needle body; 701. Stop ladder; 8. Top cap; 9. Combination bolt; 10. Pressing piece; 11. Guide stud; 12. Oblique arm; 13. Hinge; 14. Through rod; 15. Swing arm; 16. Tension spring; 17. Claw; 18. Positioning bolt; 19. Compression spring; 20. Lock nut. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0054] See also Figures 1 to 16 As an embodiment of the present invention, the pluggable optical fiber array structure suitable for high-precision positioning of the CPO module includes a PIN needle seat and an optical fiber connection module. The PIN needle seat includes a PIN needle seat cover plate 3 and a PIN needle seat base plate 4 fixedly connected to each other, and a PIN needle body 7 is fixedly arranged between the PIN needle seat cover plate 3 and the PIN needle seat base plate 4;

[0055] The optical fiber connection module includes a PIN pin cover 1 and a PIN pin base 2 distributed above and below. A notch is formed on one side of the center of the PIN pin cover 1 close to the PIN pin seat, and an optical fiber pressing block 5 is provided at the notch.

[0056] The optical fiber pressing block 5 is connected to the optical fiber connection module via an elastic structure, which is used to pre-tighten one end of the ribbon optical fiber 6 into the optical fiber V-groove 202 formed on the PIN pin base 2 through the optical fiber pressing block 5;

[0057] A locking structure is further provided between the optical fiber connection module and the PIN needle seat, and is used to fasten the PIN needle body 7 into the PIN needle pressing V-groove 203 formed on the PIN needle base 2 after the optical fiber clamp 5 fastens one end of the ribbon optical fiber 6 into the optical fiber V-groove 202 formed on the PIN needle base 2;

[0058] The centers of the individual optical fibers in the optical fiber ribbon 6 are connected to form a straight line, and the center of the PIN needle body 7 is also on the straight line.

[0059] In this embodiment, the elastic structure provided in the present invention pre-tightens one end of the optical fiber ribbon 6 in the optical fiber V-groove 202 using the optical fiber clamp 5. The lower surface of the optical fiber clamp 5 and the two sides of the optical fiber V-groove 202 together form an isosceles triangle. The three sides of the isosceles triangle are tangent to each of the individual optical fibers in the optical fiber ribbon 6 at three points, thereby improving mechanical stability and optical path alignment accuracy.

[0060] After one end of the optical fiber ribbon 6 is pre-tightened in the optical fiber V-groove 202, the PIN needle holder and the optical fiber connection module are connected. During the connection process, the PIN needle body 7 fixed on the PIN needle holder is continuously inserted into the PIN needle pressing V-groove 203 in the optical fiber connection module, and the optical fiber pressing block 5 is continuously moved closer to the PIN needle base 2, so that the optical fiber ribbon 6 is finally tightened between the lower surface of the optical fiber pressing block 5 and the optical fiber V-groove 202.

[0061] The optical fiber pressing block 5 continuously approaches the PIN needle base 2, driving the PIN needle pressing cover 1 to continuously move closer to the PIN needle base 2. After the PIN needle seat and the optical fiber connection module are fully connected, the completely close PIN needle pressing cover 1 and the PIN needle base 2 cause the PIN needle body 7 to be pressed between the PIN needle pressing V-groove 203 and the lower surface of the PIN needle pressing cover 1. The lower surface of the PIN needle pressing cover 1 and the two sides of the PIN needle pressing V-groove 203 together form an isosceles triangle. The three sides of the isosceles triangle form a three-point tangent relationship with the PIN needle body 7, completing the final tightening of the PIN needle body 7 and improving the mechanical stability and optical path alignment accuracy.

[0062] In addition, with the help of the provided locking structure, after the PIN needle seat and the optical fiber connection module are fully connected, the two cannot be separated, thereby ensuring that the ribbon optical fiber 6 and the PIN needle body 7 remain completely tight.

[0063] In the present invention, since the optical fiber ribbon 6 is pre-tightened in the optical fiber V-groove 202 before the optical fiber connection module is fully connected to the PIN needle seat, it has a certain expansion and contraction clearance. When the PIN needle seat is fixed in position and can only be connected to the PIN needle seat through the optical fiber connection module, even if the length of the optical fiber ribbon 6 is insufficient, the length can be compensated by the optical fiber ribbon 6 sliding and expanding and contracting in the optical fiber V-groove 202 along its length direction, so as not to cause the optical fiber ribbon 6 to be broken.

[0064] The center of each optical fiber in the optical fiber ribbon 6 is on the same straight line as the center of the PIN needle body, which is beneficial for positioning and coupling.

[0065] As a further solution of the present invention, a plurality of combining bolts 9 are provided between the PIN needle pressure cover 1 and the PIN needle base 2. The combining bolts 9 can detachably penetrate the PIN needle pressure cover 1 and the PIN needle base 2, and one end of the combining bolt 9 is threadedly connected to the top cap 8.

[0066] In this embodiment, when assembling the optical fiber connection module, first, multiple combining bolts 9 are passed through the PIN pin pressure cover 1 and the PIN pin base 2, and then multiple top caps 8 are threadedly connected to the top ends of the multiple combining bolts 9, so that the PIN pin pressure cover 1 and the PIN pin base 2 are combined; at this time, although the PIN pin pressure cover 1 and the PIN pin base 2 have been combined, they are not completely tightened between the two, ensuring that there is still a certain amount of tight redundant space between the lower surface of the PIN pin pressure cover 1 and the PIN pin pressing V-groove 203.

[0067] The purpose of such a setting is to ensure that the PIN pin slot formed by the lower surface of the PIN pin pressure cover 1 and the PIN pin pressing V-groove 203 can form a clearance fit with the PIN pin body 7, thereby reducing the resistance of the PIN pin body 7 to inserting into the PIN pin slot; and when the PIN pin seat and the optical fiber connection module are fully connected, the completely close PIN pin pressure cover 1 and the PIN pin base 2 can reduce the size space of the PIN pin slot, so that a transition fit or interference fit is formed between the PIN pin body 7 and the PIN pin slot, thereby increasing the resistance of the PIN pin body 7 to be pulled out of the PIN pin slot, and effectively increasing the difficulty of the PIN pin body 7 being separated from the PIN pin slot due to the force applied to the ribbon optical fiber 6.

[0068] As a further solution of the present invention, the elastic structure includes two penetrating rods 14 fixedly arranged on one side of the PIN pin pressure cover 1, one end of the penetrating rod 14 is rotatably connected to one end of the hinge 13, and the other end of the hinge 13 is rotatably connected to the optical fiber pressure block 5;

[0069] The two hinge pieces 13 are parallel to each other and form a parallelogram. An oblique arm 12 is fixedly provided on the PIN needle base 2. One end of the oblique arm 12 is rotatably connected to one end of a swing arm 15. The other end of the swing arm 15 is rotatably connected to the optical fiber pressure block 5 through a pin fixedly provided on the optical fiber pressure block 5. A horizontal axis is fixedly provided on the oblique arm 12, and a tension spring 16 is provided between the horizontal axis and the pin.

[0070] In this embodiment, since the upper ends of the two hinged pieces 13 are rotatably connected to the optical fiber pressing block 5, and the lower ends of the two hinged pieces 13 are rotatably connected to the PIN pin pressing cover 1 through the through rod 14, a parallelogram is formed between the two hinged pieces 13, the optical fiber pressing block 5, and the PIN pin pressing cover 1, that is, the optical fiber pressing block 5 is always parallel to the PIN pin pressing cover 1.

[0071] See also Figure 8, in the initial state, the swing arm 15 is close to the vertical position. At this time, the tension spring 16 pulls the pin shaft to make the swing arm 15 have a tendency to rotate clockwise. In this state, the optical fiber clamp 5 has a tendency to move away from the optical fiber V-groove 202. At this time, the optical fiber ribbon 6 can be installed in the optical fiber V-groove 202, and then the optical fiber clamp 5 is pressed down. The optical fiber clamp 5 will rotate counterclockwise while maintaining parallel to the PIN pin pressure cover 1, and the stretched length of the tension spring 16 will continue to increase; when the optical fiber clamp 5 drives the swing arm 15 to rotate counterclockwise to be collinear with the inclined arm 12, the tension spring 16 reaches the maximum stretch and is in the equilibrium position; continue to press the optical fiber clamp 5 downward, the swing arm 15 will exceed the equilibrium position. Once it exceeds the equilibrium position, the tension spring 16 will pull the swing arm 15 to have a tendency to rotate counterclockwise, and pull the pin shaft to make the swing arm 15 have a tendency to rotate counterclockwise, that is, it has an elastic tendency to drive the optical fiber clamp 5 to approach the optical fiber V-groove 202, and finally present as shown in the attached figure. Figure 8 under the action of the elastic force of the tension spring 16, it is possible to maintain the optical fiber clamp 5 to pre-tighten the optical fiber ribbon 6 in the optical fiber V-groove 202.

[0072] It should be noted that the acute angle formed between the oblique arm 12 and the horizontal line is less than 45 degrees, the rotational connection between the oblique arm 12 and the swing arm 15, and the rotational connection between the two penetrating rods 14 and the two hinges 13 are on the same horizontal line, and the swing arm 15 is parallel to the hinge 13;

[0073] The purpose of this arrangement is to keep the hinge 13 always parallel to the swing arm 15. When the swing arm 15 passes the equilibrium position, the acute angle formed between the swing arm 15 and the horizontal line is less than 45°. That is, after the optical fiber ribbon 6 is pre-tightened, the acute angle formed between the hinge 13 and the horizontal line is less than 45°. When the optical fiber ribbon 6 is subjected to an external force and attempts to disengage from the optical fiber V-groove 202, the friction force (the direction of the friction force is horizontal to the right) drives the optical fiber clamp 5 to move away from the PIN pin holder. However, the optical fiber clamp 5's desire to move away from the PIN pin holder is transmitted to the hinge 13 and the swing arm 15. Since the acute angle formed between the swing arm 15 and the horizontal line is less than 45°, and the acute angle formed between the hinge 13 and the horizontal line is also less than 45°, a downward component force is generated, causing the optical fiber clamp 5 to increasingly move closer to the optical fiber V-groove 202, increasing the pressing force between the optical fiber clamp 5 and the optical fiber V-groove 202, and thus increasing the resistance to the optical fiber ribbon 6 from disengaging.

[0074] As a further solution of the present invention, in order to form the optical fiber clamp 5 and the PIN pin cover 1 as a whole, a movable cavity 503 is formed on the optical fiber clamp 5, and a guide stud 11 is provided in the movable cavity 503. The upper portion of the guide stud 11 is threadedly connected to the optical fiber clamp 5;

[0075] The optical fiber pressing block 5 is connected to the PIN needle pressing cover 1 through a pressing piece 10. One end of the pressing piece 10 is located in the movable cavity 503 and can slide vertically along the lower part of the guide stud 11 in the movable cavity 503. The PIN needle pressing cover 1 is provided with a socket 101, and the other end of the pressing piece 10 is horizontally slidably engaged with the socket 101.

[0076] In this embodiment, the guide screw 11 is used to allow the pressing member 10 to move up and down relative to the optical fiber pressing block 5, and the pressing member 10 can also move horizontally relative to the PIN pin pressing cover 1. That is, the PIN pin pressing cover 1 and the optical fiber pressing block 5 connected by the pressing member 10 can not only move horizontally relative to each other, but also move vertically relative to each other.

[0077] After the optical fiber clamp 5 pre-tightens the optical fiber ribbon 6 in the optical fiber V-groove 202 (that is, after the optical fiber clamp 5 remains horizontal and rotates beyond the equilibrium position), the upper surface of the lower pressing member 10 has already been in contact with the upper surface of the movable cavity 503; therefore, in the subsequent final tightening process, the optical fiber clamp 5 further approaches the optical fiber V-groove 202, and the PIN pin cover 1 will be driven to move along through the lower pressing member 10, and approach the PIN pin base 2, thereby final tightening the PIN pin body 7 in the PIN pin slot.

[0078] As a further solution of the present invention, a cover notch 301 is formed in the lower center of the PIN needle seat cover 3, and a bottom plate notch 401 is formed in the upper center of the PIN needle seat bottom plate 4;

[0079] The bottom plate notch 401 and the cover plate notch 301 form a final tight seal;

[0080] The PIN needle base 2 is formed with a base positioning end 201 in the center of one end close to the PIN needle seat, and the optical fiber pressing block 5 is formed with a pressing block positioning end 501 in the center of one end close to the PIN needle seat;

[0081] The base positioning end 201 and the pressing block positioning end 501 form a final tightening end;

[0082] The final tightening end is adapted to the final tightening seal.

[0083] In this embodiment, during the connection between the PIN needle seat and the optical fiber connection module, the PIN needle seat and the optical fiber connection module are positioned up and down and front and back by inserting the final tightening end into the final tightening seal; at the same time, after the final tightening end is inserted into the final tightening seal, the final tightening seal is used to make the lower surface of the optical fiber clamp 5 close to the optical fiber V-groove 202, and the ribbon optical fiber 6 is final tightened in the optical fiber V-groove 202; and in the process of the optical fiber clamp 5 being final tightened and close to the optical fiber V-groove 202, the downward pressing piece 10 is used to drive the PIN needle pressure cover 1 to follow the downward pressure, so that the PIN needle pressure cover 1 is close to the PIN needle base 2 and the PIN needle body 7 is final tightened.

[0084] As a further solution of the present invention, a PIN needle positioning V-groove 402 is formed on the PIN needle seat bottom plate 4, and the PIN needle body 7 is pressed and fixed between the PIN needle positioning V-groove 402 and the lower surface of the PIN needle seat cover plate 3, forming a three-point tangency;

[0085] A stop step 701 is formed on the outer wall of the PIN needle body 7 , and one side of the stop step 701 is in close contact with the PIN needle seat.

[0086] In this embodiment, the PIN needle body 7 is fixed to the PIN needle seat by using the PIN needle positioning V-groove 402 and the lower surface of the PIN needle seat cover 3, and the stop step 701 can effectively prevent the PIN needle body 7 from retreating during the insertion into the PIN needle slot.

[0087] As a further solution of the present invention, a wedge surface 502 is formed on the upper portion of the positioning end 501 of the pressure block. When the PIN needle seat and the optical fiber connection module are fully connected, the wedge surface 502 is completely located in the final tight seal.

[0088] In this embodiment, the wedge surface 502 can achieve a labor-saving pressing effect. The wedge surface 502 interacts with the cover plate notch 301 to drive the optical fiber clamp 5 downward to approach the optical fiber V-groove 202 and finally tighten the optical fiber ribbon 6.

[0089] As a further solution of the present invention, the locking structure includes a lock 102 provided on the PIN pin pressure cover 1 and a claw 17 elastically and movably provided on the PIN pin seat cover 3;

[0090] The front end of the claw 17 forms a right-angled triangle. A guide surface 1021 is formed on the inner side of the locking opening 102 adjacent to the outer side, and a vertical locking surface 1022 is formed on the side adjacent to the guide surface 1021 .

[0091] In this embodiment, when the PIN needle holder and the optical fiber connection module are almost fully connected, the right-angled triangle portion at the front end of the claw 17 enters the lock hole 102, and the inclined surface of the right-angled triangle portion contacts the guide surface 1021, causing the claw 17 to lift up; when the PIN needle holder and the optical fiber connection module are fully connected, the inclined surface of the right-angled triangle portion just passes over the guide surface 1021, and then the claw 17 moves down and resets, so that the vertical surface of the right-angled triangle portion fits with the locking surface 1022, keeping the PIN needle holder and the optical fiber connection module fully connected and prevented from detaching.

[0092] As a further solution of the present invention, a sliding cavity 302 is provided on the PIN needle seat cover 3, and one end of the claw 17 vertically slides in the sliding cavity 302;

[0093] The PIN seat cover plate 3 is detachably provided with a positioning bolt 18 , which passes through the sliding cavity 302 and is fixed to the PIN seat cover plate 3 by a locking nut 20 threadedly connected at one end of the positioning bolt 18 ;

[0094] The sliding cavity 302 is connected to a compression cavity 3021, one end of the claw 17 is slidably engaged with the positioning bolt 18, and a compression spring 19 is provided in the compression cavity 3021. The compression spring 19 is sleeved on the outer periphery of the positioning bolt 18, one end of the compression spring 19 is in contact with the top wall of the compression cavity 3021, and the other end is in contact with the claw 17.

[0095] In this embodiment, the positioning bolt 18 is provided so that the claw 17 can only slide up and down in the sliding cavity 302, and when the claw 17 slides upward, the compression spring 19 is compressed; and once the inclined surface of the right-angled triangle portion passes over the guide surface 1021, the elastic force of the compression spring 19 will drive the claw 17 to reset, so that the vertical surface of the right-angled triangle portion fits into the locking surface 1022, thereby locking the PIN needle seat and the optical fiber connection module.

[0096] The above embodiments are exemplary rather than restrictive, so any technical solution that can be implemented in other specific forms without departing from the spirit or basic features of the present invention is included in the present invention.

Claims

1. A pluggable optical fiber array structure suitable for high-precision positioning of a CPO module, comprising a PIN needle seat and an optical fiber connection module, wherein the PIN needle seat comprises a PIN needle seat cover plate (3) and a PIN needle seat base plate (4) fixedly connected to each other, and a PIN needle body (7) is fixedly arranged between the PIN needle seat cover plate (3) and the PIN needle seat base plate (4); It is characterized by: The optical fiber connection module comprises a PIN pin pressure cover (1) and a PIN pin base (2) distributed above and below, a notch is formed in the center of the PIN pin pressure cover (1) on one side close to the PIN pin base, and an optical fiber pressure block (5) is provided in the notch; The optical fiber pressing block (5) is connected to the optical fiber connection module via an elastic structure, and is used to pre-tighten one end of the ribbon optical fiber (6) into the optical fiber V-groove (202) formed on the PIN needle base (2) via the optical fiber pressing block (5); A locking structure is also provided between the optical fiber connection module and the PIN needle seat, and the locking structure is used to tighten the PIN needle body (7) into the PIN needle pressing V groove (203) formed on the PIN needle base (2) after the optical fiber pressing block (5) tightens one end of the ribbon optical fiber (6) into the optical fiber V groove (202) formed on the PIN needle base (2); The centers of the individual optical fibers in the optical fiber ribbon (6) are connected to form a straight line, and the center of the PIN needle body (7) is also on the straight line; The elastic structure comprises two penetration rods (14) fixedly arranged on one side of the PIN pin pressure cover (1), one end of the penetration rod (14) is rotatably connected to one end of the hinge piece (13), and the other end of the hinge piece (13) is rotatably connected to the optical fiber pressing block (5); The two hinge pieces (13) are parallel to each other and form a parallelogram. An oblique arm (12) is fixedly provided on the PIN needle base (2). One end of the oblique arm (12) is rotatably connected to one end of a swing arm (15). The other end of the swing arm (15) is rotatably connected to the optical fiber pressing block (5) via a pin fixedly provided on the optical fiber pressing block (5). A transverse axis is fixedly provided on the oblique arm (12), and a tension spring (16) is provided between the transverse axis and the pin.

2. The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules according to claim 1, characterized in that: A plurality of combined bolts (9) are provided between the PIN needle pressure cover (1) and the PIN needle base (2). The combined bolts (9) are detachably inserted through the PIN needle pressure cover (1) and the PIN needle base (2), and one end of the combined bolts (9) is threadedly connected to the top cap (8).

3. The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules according to claim 1, characterized in that: A movable cavity (503) is provided on the optical fiber pressing block (5), a guide stud (11) is provided in the movable cavity (503), and the upper portion of the guide stud (11) is threadedly connected to the optical fiber pressing block (5); The optical fiber pressing block (5) and the PIN needle pressing cover (1) are connected via a pressing member (10), one end of the pressing member (10) is located in the movable cavity (503) and can slide vertically along the lower part of the guide stud (11) in the movable cavity (503); a socket (101) is provided on the PIN needle pressing cover (1), and the other end of the pressing member (10) is horizontally slidably engaged with the socket (101).

4. The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules according to claim 1, characterized in that: A cover plate notch (301) is formed at the lower center of the PIN needle seat cover plate (3), and a base plate notch (401) is formed at the upper center of the PIN needle seat base plate (4); The bottom plate notch (401) and the cover plate notch (301) form a final tight seal; A base positioning end (201) is formed in the center of one end of the PIN needle base (2) close to the PIN needle seat, and a pressing block positioning end (501) is formed in the center of one end of the optical fiber pressing block (5) close to the PIN needle seat; The base positioning end (201) and the pressing block positioning end (501) form a final tightening end; The final tightening end is adapted to the final tightening seal.

5. The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules according to claim 1, characterized in that: A PIN needle positioning V-groove (402) is formed on the PIN needle seat bottom plate (4), and the PIN needle body (7) is pressed and fixed between the PIN needle positioning V-groove (402) and the lower surface of the PIN needle seat cover plate (3), forming a three-point tangency; A stop step (701) is formed on the outer wall of the PIN needle body (7), and one side of the stop step (701) is in close contact with the PIN needle seat.

6. The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules according to claim 4, characterized in that: A wedge surface (502) is formed on the upper portion of the pressing block positioning end (501), and when the PIN needle seat and the optical fiber connection module are fully connected, the wedge surface (502) is completely located in the final tight seal.

7. The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules according to claim 6, characterized in that: The locking structure comprises a locking port (102) provided on the PIN needle pressure cover (1) and a claw (17) elastically and movably provided on the PIN needle seat cover plate (3); The front end of the claw (17) forms a right-angled triangle, and a guide surface (1021) is formed on the inner side of the locking opening (102) adjacent to the outer side, and a vertical locking surface (1022) is formed on the side adjacent to the guide surface (1021).

8. The pluggable optical fiber array structure suitable for high-precision positioning of CPO modules according to claim 7, characterized in that: The PIN seat cover (3) is provided with a sliding cavity (302), and one end of the claw (17) is vertically slidably engaged with the sliding cavity (302); A positioning bolt (18) is detachably provided on the PIN needle seat cover (3), the positioning bolt (18) passes through the sliding cavity (302), and the positioning bolt (18) is fixed to the PIN needle seat cover (3) via a locking nut (20) threadedly connected at one end thereof; The sliding cavity (302) is connected to a compression cavity (3021), one end of the clamping claw (17) is slidably engaged with the positioning bolt (18), and a compression spring (19) is provided in the compression cavity (3021). The compression spring (19) is sleeved on the outer periphery of the positioning bolt (18), one end of the compression spring (19) contacts the top wall of the compression cavity (3021), and the other end contacts the clamping claw (17).

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