Pre-relaxed MPO fiber optic connector

Abstract

The present application discloses a pre-relaxed MPO optical fiber connector. It includes: a core that can accommodate an optical fiber, and the optical fiber end face terminates at the front end of the core; an inner housing that is sleeved on the core and can limit the core; a guide pin bracket that is arranged at the rear end of the core; a spring that is arranged at the rear end of the guide pin bracket; a rear housing that is used to dock with the inner housing; and a component for repeatedly controlling the expansion and contraction of the spring. The wear of the guide pin hole is reduced, the number of times the optical fiber connector can be plugged in and out is significantly increased, and the service life of the optical fiber connector is greatly increased.

Description

Technical Field

[0001] The present application relates to the field of optical fiber connectors, and in particular to a pre-relaxed MPO optical fiber connector. Background Art

[0002] MPO fiber optic connector is a connection device used for repeated plugging and unplugging between optical fibers. It uses high-precision components to achieve micron-level precision connection of optical fibers. MPO fiber optic connector is a multi-fiber fiber optic connector.

[0003] MPO fiber optic connectors usually include two male and female connectors and an adapter. The connector with a fixed guide pin is called a male connector, and the connector that matches the guide pin is called a female connector. The adapter is set at the connection between the male and female connectors to fix the two male and female connectors. The male and female connectors are positioned by the guide pin.

[0004] refer to Figure 1 , the male and female connectors include:

[0005] Ferrule 2: It is a precision component manufactured by plastic injection molding process, including multiple fiber holes and two guide pin holes. The optical fiber is fixed in the fiber hole. The end face of the multi-fiber optical fiber 14 is located at the front end face of ferrule 2, and the guide pin 1 is placed in the guide pin hole.

[0006] Guide needle bracket 4: used to fix two guide needles 1 and connect with the ferrule 2 through the guide needles 1.

[0007] Inner housing 3: sleeved on the outer circumference of the insert core 2.

[0008] Rear housing 10: detachably connected to inner housing 3. Optical fibers can pass through rear housing 10.

[0009] The spring 8 and the guide needle bracket 4 are arranged inside the inner shell 3. The guide needle bracket 4 is arranged on a side of the insert 2 close to the rear shell 10. The guide needle 1 passes through the guide needle hole and is detachably connected to the guide needle bracket 4.

[0010] The spring 8 , the guide needle bracket 4 , and the insert core 2 are fixed inside by the inner housing 3 and the rear housing 10 . The front of the spring 8 abuts against the guide needle bracket 4 , and the back of the spring abuts against the rear housing 10 .

[0011] The spring 8 is sleeved on the outer peripheral surface of the optical fiber, and the two ends of the spring 8 are respectively in contact with the rear housing 10 and the guide pin bracket 4, and the spring 8 is in a compressed state.

[0012] In addition, the male and female connectors further include an outer shell 5 , a return spring 6 , a crimping ring 11 and a tail sleeve 12 . Summary of the invention

[0013] As described above in detail, the structure of the existing MPO fiber optic connector has significant problems, such as Figure 2 shown. Figure 2 The figure shows the state of a pair of MPO connectors at the beginning of docking in the prior art. The existing MPO ferrule 2 and its guide pin hole 19 are usually made of plastic, while the guide pin 1 is a precision component formed of stainless steel or ceramic material, and there is a chamfer on the guide pin 1. Before docking the MPO connectors, under normal circumstances, the central axis of the guide pin hole 19 and the guide pin 1 do not coincide, so the chamfer of the guide pin 1 needs to bend the MT ferrule 2 horizontally to achieve accurate docking of the two ferrules 2.

[0014] Under the action of the spring 8, there is a force of about 10N pushing the ferrule 2 forward, which is pushed to the inner shell 3 and limited by the inner shell 3. There is a certain lateral static friction between the ferrule 2 and the inner shell 3, and the static friction is proportional to the spring force. The spring force of 10N is a relatively large force, and the static friction caused by it is very large. The guide pin 1 needs to apply a lateral force exceeding this static friction to the guide pin hole of the ferrule 2 in order to allow the ferrule 2 to move laterally to a position aligned with the guide pin 1. This large lateral force causes the guide pin hole to wear quickly, which in turn causes the connector to fail and the connector life is too short.

[0015] In the art, the problem of rapid wear of the guide pin hole has existed since the invention of the MPO fiber optic connector and has existed for decades. It is a global problem in the art.

[0016] In view of the above-mentioned problems existing in the art, the purpose of the present application is to provide a pre-relaxed MPO optical fiber connector, which can effectively solve the problem of rapid wear of the above-mentioned MPO guide pin hole.

[0017] In the optical fiber connector of the present application, the spring exists in two states, namely, a relaxed state and a tightened state. At the beginning of docking, the spring is in a relaxed state, the static friction of the ferrule is very small, and the guide pin only needs to apply a small lateral force to pull the ferrule to a suitable position and complete the alignment operation of inserting the guide pin into the guide pin hole. After alignment, the spring is adjusted to a tightened state through the spring slider.

[0018] We call this type of MPO fiber optic connector "pre-relaxed MPO fiber optic connector".

[0019] The specific technical solutions of this application are as follows:

[0020] A pre-relaxed MPO optical fiber connector component comprises: a core that can accommodate an optical fiber, with the optical fiber end face terminating at the front end of the core; an inner housing that is sleeved on the core and can limit the core; a guide pin bracket that is arranged at the rear end of the core; a spring that is arranged at the rear end of the guide pin bracket; a rear housing that is used to dock with the inner housing; and a component that is used to repeatedly control the expansion and contraction of the spring.

[0021] In a specific embodiment, the component for repeatedly controlling the expansion and contraction of the spring includes: a moving component located at the rear end of the ferrule and capable of moving along the extension direction of the optical fiber bundle; the moving component can compress the spring. In a specific embodiment, the component for repeatedly controlling the expansion and contraction of the spring also includes: a fixed component capable of controlling the movement of the moving component.

[0022] In a specific embodiment, the movable member is sleeved on the inner housing, and the spring is arranged between the guide needle bracket and the movable member.

[0023] In a specific embodiment, the movable member includes a slider which is an annular structure and is sleeved on the outer surface of the inner shell. A locking window is provided on the inner surface of the slider, and the fixed member includes a wedge block.

[0024] In a specific embodiment, an extension arm is provided on the inner surface of the slider, the extension arm extends to the interior of the inner shell near the optical fiber bundle, a sliding groove for the extension arm to slide is provided on the inner shell, and the extension arm is connected to the spring.

[0025] In a specific embodiment, the spring includes two springs arranged on both sides of the optical fiber bundle, and the two ends of each spring are respectively connected to the extension arm and the guide needle bracket. A spring guide column for limiting the spring is arranged on the guide needle bracket, and the spring is sleeved on the spring guide column.

[0026] In a specific embodiment, the wedge block is mounted on an elastic arm that is elastically deformable and is arranged on the inner shell; preferably, the wedge block is an inclined surface on the side close to the slider, and the wedge block is a plane roughly perpendicular to the optical fiber bundle on the side away from the slider; preferably, two elastic arms and two wedge blocks are arranged.

[0027] In a specific embodiment, an outer shell capable of pressing down the movable arm is sleeved on the inner shell, and a return spring is preferably arranged inside the outer shell.

[0028] In a specific embodiment, the sliding groove passes through the rear end surface of the inner shell in its extension direction; the rear shell can limit the sliding block, and the rear shell and the inner shell are detachably connected.

[0029] In a specific embodiment, a through slot capable of delivering the optical fiber bundle into the rear housing is provided on the rear housing, and a rear housing sealing block capable of engaging with the through slot is provided on the rear housing.

[0030] In a specific embodiment, the optical fiber connector component further includes: a crimping ring, which is arranged at the rear end of the rear housing, and a tail sleeve, which is sleeved on the crimping ring.

[0031] The present application also provides a pre-relaxed MPO optical fiber connector, comprising: a first connector component; a second connector component having a guide pin; the first connector component and / or the second connector component are the above-mentioned connector components.

[0032] In a specific embodiment, a guide pin hole is formed on the insert core of the second connector component, and the guide pin passes through the guide pin hole.

[0033] In a specific embodiment, the connecting device further comprises an adapter for fixing the first connector component and the second connector component.

[0034] Beneficial Effects

[0035] 1. The pre-relaxed MPO fiber optic connector of the present application reduces the force of the guide pin on the guide pin hole when the guide pin is inserted into the guide pin hole, thereby achieving the purpose of reducing the wear of the guide pin hole, significantly increasing the number of times the fiber optic connector can be plugged and unplugged, and greatly improving the service life of the fiber optic connector. After sufficient testing by the applicant, the fiber optic connector can withstand thousands of plugging and unplugging and still be used normally.

[0036] 2. The pre-relaxed MPO fiber optic connector of the present application uses a discrete double spring instead of a traditional single spring. All parts should be avoided from being pre-mounted on the optical fiber as much as possible. This can bring flexibility to the product production process and use. For example, in processes such as core grinding, there is no constraint of parts such as springs, and the production process will be more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a structural breakdown diagram of an MPO connector in the prior art;

[0038] Figure 2 A diagram showing the state of a pair of MPO connectors at the beginning of docking in the prior art;

[0039] Figure 3 This is a disassembled diagram of the overall structure of the connector components of this application;

[0040] Figure 4 It is a three-view drawing of the slider in this application;

[0041] Figure 5 It is a three-view drawing of the inner shell in this application;

[0042] Figure 6 It is a three-view drawing of the rear housing and the rear housing sealing block in this application.

[0043] Figure 7 It is a three-view drawing of the outer shell in this application;

[0044] Figure 8 It is a disassembled diagram of the preliminary installation structure of the connector components in this application (a schematic diagram of the installation sequence of the connector components);

[0045] Fig. 9 It is a disassembled diagram of the further installation structure of the connector component in this application;

[0046] 10(A) and 10(B) are diagrams showing the relaxed and tightened states of the spring after the connector component is installed in the present application;

[0047] 11(A) and 11(B) are cross-sectional views of the spring in the relaxed and tensed states after the connector components are installed in the present application.

[0048] Explanation of symbols

[0049] 1. Guide pin; 2. Insert core; 3. Inner shell; 4. Guide pin bracket; 5. Outer shell; 6. Reset spring; 7. Spring guide column; 8. Spring; 9. Slider; 10. Rear shell; 11. Crimping ring; 12. Tail sleeve; 14. Multi-fiber optical fiber; 15. Locking window; 16. Wedge block; 18. Elastic arm; 19. Guide pin hole; 20. Rear shell sealing block; 21. Decoupling part; 22. Extension arm; 23. Sliding groove; 24. Groove; 25. Inclined surface; 26. Rear end face of wedge block; 27. Front end face of wedge block; 28. Undercut; 29. ​​Crimping part; 30. Through groove. DETAILED DESCRIPTION

[0050] The present application is described in detail below. Although specific embodiments of the present application are shown, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0051] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the functional differences of components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" are open-ended terms and should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present application, but the description is based on the general principles of the specification and is not intended to limit the scope of the present application. The scope of protection of the present application shall be determined by the attached claims.

[0052] The overall structure of the multi-fiber connector components of this application can be found in Figure 3 , Figure 3This is a disassembled diagram of the overall structure of the multi-fiber connector component of the present application.

[0053] like Figure 3 As shown, the present application provides a pre-relaxed MPO fiber optic connector component, which includes: a guide pin 1, a core 2, an inner shell 3, a guide pin bracket 4, an outer shell 5, a return spring 6, a spring guide column 7, a spring 8, a slider 9, a rear shell 10, a crimping ring 11, a tail sleeve 12 and a rear shell sealing block 20.

[0054] A core 2, which can accommodate an optical fiber (for example, a multi-fiber optical fiber 14), and the optical fiber end face terminates at the front end of the core 2; an inner shell 3, which is sleeved on the core 2 and can limit the core 2; a guide pin bracket 4, which is arranged at the rear end of the core 2; a spring 8, which is arranged at the rear end of the guide pin bracket 4; a rear shell 10, which is used to dock with the inner shell 3; and a component for repeatedly controlling the expansion and contraction of the spring 8.

[0055] The component for repeatedly controlling the expansion and contraction of the spring 8 of the present application includes: a movable component located at the rear end of the ferrule 2 and capable of moving along the extending direction of the optical fiber bundle; and a fixed component capable of controlling the movement of the movable component.

[0056] In a specific embodiment, the inner shell 3 and the rear shell 10 are both hollow structures. After assembly, the ferrule 2 and the optical fiber are both arranged inside the inner shell 3 and the rear shell 10 .

[0057] The optical fibers connected by the multi-fiber connector of the present application include several fibers, and the multiple optical fibers are also referred to as optical fiber bundles or multi-fiber optical fibers 14 in the present application.

[0058] During the optical fiber connection process, the optical fiber bundle forms an optical fiber end face at the connection. In the field of optical fiber, the end close to the optical fiber end face is usually defined as the front end, and the end away from the optical fiber end face along the extension direction of the optical fiber is defined as the back end.

[0059] The present application also provides a pre-relaxed MPO optical fiber connector, which includes: a first connector component and a second connector component having a guide pin and an adapter for fixing, wherein the first connector component and / or the second connector component is the above-mentioned pre-relaxed MPO connector component.

[0060] refer to Figure 3 and Figure 8 After installation, the ferrule 2 is located inside the inner housing 3, and there is a gap between the ferrule 2 and the inner housing 3, so the ferrule 2 can move inside the inner housing 3. When connecting the optical fiber harness, the two ferrules 2 need to be aligned. At this time, due to the existence of errors, the ferrule 2 needs to be adjusted to a suitable position in the inner housing 3.

[0061] As described in the background technology ( Figure 2), in the prior art MPO connector, the spring 8 continuously provides elastic force to the ferrule 2, tightly abutting the ferrule 2 against the inside of the inner shell 3, making it very difficult to adjust the position of the ferrule 2 in the inner shell 3.

[0062] However, as described in detail below, the component of the present application can repeatedly control the expansion and contraction of the spring 8. When the optical fiber harness needs to be connected, the spring 8 is extended to reduce the elastic force applied by the spring 8 to the ferrule 2. The ferrule 2 can be more easily moved inside the inner shell 3 to find a suitable position for docking, thereby reducing the resistance encountered by the ferrule 2 when adjusting its position, reducing the wear of the guide pin hole caused by resistance or friction, and increasing the service life of the optical fiber connector and optical fiber connector components.

[0063] When the ferrule 2 is adjusted to a suitable position and the optical fiber harness is docked, the position of the ferrule 2 inside the inner shell 3 has been determined. The component of the present application can control the spring 8 to be compressed. The spring 8 adds sufficient pre-tightening force to the ferrule 2, so that the ferrule 2 is tightly against the inside of the inner shell 3, reducing the movement of the ferrule 2 inside the inner shell 3 and increasing the docking force of the optical fiber connector.

[0064] Figure 4 It is a three-view drawing of the slider 9 in the present application. The slider 9 is an annular structure with two inwardly extending extension arms 22 and two locking windows 15. The extension arms 22 have a protruding structure for clamping the spring 8. The hollow part of the annular structure allows the ferrule 2 to pass through.

[0065] Figure 5 3 is a three-view drawing of the inner housing 3 in the present application. The inner housing 3 is a hollow structure, including two upper and lower elastic arms 18, two sliding grooves 23 and two wedge blocks 16. The two wedge blocks 16 have a front end face 27 and a rear end face 26, the front end face 27 is a plane substantially perpendicular to the multi-fiber optical fiber 14, and the rear end face 26 is an inclined surface. There is an inclined surface 25 on both elastic arms 18.

[0066] Figure 6 It is a three-view drawing of the rear housing 10 and the rear housing sealing block 20 in the present application. It includes two grooves 24, four undercuts 28, and a rear housing crimping portion 29. The rear housing is provided with a through slot 30, which cooperates with the rear housing sealing block 20. The optical fiber harness can pass through the through slot 30 and enter the central axis of the rear housing. After entering, the rear housing sealing block 20 can be snap-fitted with the rear housing through slot 30 to form a closed structure.

[0067] Figure 7 3 is a three-view diagram of the outer shell 5 in the present application. The outer shell 5 is a hollow structure, which is sleeved on the inner shell 10 and includes a decoupling portion 21. It has a dual function.

[0068] 1) The outer shell 5 cooperates with the inner shell 3 and the return spring 6 to achieve locking between the MPO multi-fiber connector and the MPO adapter. This is the same as the function of the outer shell of a common MPO fiber optic connector.

[0069] 2) The decoupling part 21 of the outer housing 5 controls the slider 9 through the inner housing 3, so that the slider 9 slides from the front position to the rear position. The specific movement mechanism is shown in FIG11 .

[0070] Figure 8 This is a disassembled diagram of the preliminary installation structure of the connector components in this application, showing the installation order of the connector components. After the ferrule 2, the guide pin bracket 4, and the double spring 8 are assembled, the rear ends of the two springs 8 are engaged with the protruding structure of the slider 9. The extension arm 22 of the slider 9 first passes through the sliding groove 23 of the inner shell 3, extends into the groove 24 of the rear shell 10, and can slide along the groove 24.

[0071] Fig. 9 1 is a disassembled diagram of the further installation structure of the connector components in the present application. Here, the rear housing 10 and the inner housing 3 are clamped together to form the main body of the optical fiber connector of the present application. The extension arm 22 of the slider 9 can slide along the sliding groove 23 of the inner housing 3.

[0072] Fig. 9 The following unassembled parts are also included: a crimping ring 11, which is arranged at the rear end of the rear housing 10 and is connected to the crimping portion 29 of the rear housing; a tail sleeve 12, which is sleeved on the crimping ring 11; a return spring 6; and an outer housing 5.

[0073] Figures 10(A) and 10(B) are diagrams showing the spring in a relaxed and tightened state after the connector components are installed in the present application. The crimping ring 11, the tail sleeve 12, the return spring 6, and the outer shell 5 have all been assembled in place.

[0074] The spring relaxation state of the connector component in the present application is shown in FIG. 10(A), where the slider 9 is in the rear position and the spring 8 is in the relaxed state.

[0075] The spring tension state of the connector component is shown in FIG. 10(B) , where the slider 9 is in the front position and the spring 8 is compressed by the slider 9 . At this time, the spring 8 is in a tension state.

[0076] From the relaxed spring state to the tightened spring state: push the slider 9 forward until the slider 9 is locked in the slider forward position.

[0077] From the spring-tight state to the spring-relaxed state: pull the outer shell 5 backward until the slider 9 is released and retreats to the slider rear position.

[0078] The normal operation steps of the connector components in this application are as follows.

[0079] Insert the MPO adapter:

[0080] 1) Make sure the connector is in a spring-relaxed state;

[0081] 2) Hold the rear housing and insert the connector into the MPO adapter;

[0082] 3) Push the slider 9 forward until the slider 9 is locked to the slider front position and the spring enters a tensioned state.

[0083] Unplug from MPO adapter:

[0084] The outer housing 5 only needs to be pulled backwards.

[0085] Such a simple pull-back operation actually involves the following two actions:

[0086] 1) Pull the outer shell 5 until the slider 9 is released and retreats to the slider rear position.

[0087] 2) The continued movement of the outer shell 5 will then release the lock between the connector and the MPO adapter, and the connector will be pulled out of the MPO adapter.

[0088] FIG11(A) is a cross-sectional view of the connector component in the present application in a relaxed state of the spring after installation, wherein the slider 9 is in a rear position, the spring 8 is in a relaxed state, and the locking window 15 and the wedge block 16 are not engaged.

[0089] Fig. 11 (B) is a cross-sectional view of the spring in a tensioned state after the connector components are installed. The slider 9 is in the front position, the spring 8 is compressed by the slider 9, and the spring 8 is in a tensioned state, at which time the locking window 15 is engaged with the wedge block 16.

[0090] When the slider 9 slides from the slider rear position of FIG. 11(A) to the front position, since the rear end face 26 of the wedge block 16 is an inclined surface, the slider 9 will press the wedge block 16 toward the center of the inner housing 3, and since the elastic arm 18 has elastic deformation ability, the wedge block 16 will be pressed down into the inner housing 3, and the slider 9 will continue to slide forward on the inner housing 3. When the slider 9 slides to the point where the wedge block 16 is aligned with the locking window 15, the elastic arm will rebound in the reverse direction, the wedge block 16 enters the locking window 15, and the front end face 27 of the wedge block 16 is engaged in the locking window 15, so that the wedge block 16 is fixed to the slider 9. This position of the slider 9 is the front position, and the spring 8 is compressed.

[0091] At this time, the spring 8 exerts a backward elastic force on the slider 9, so the slider 9 has a tendency to move backward. Since the front end face 27 of the wedge block 16 is a substantially vertical plane, the front end face 27 of the wedge block 16 abuts against the inner wall of the front surface of the locking window on the slider 9, thereby achieving the limiting effect of the wedge block 16 on the slider 9.

[0092] To return from the spring tension state (FIG. 11(B)) to the spring relaxation state (FIG. 11(A)), the outer shell 5 needs to slide backwards, and the two decoupling parts 21 on the outer shell 5 push the two inclined surfaces 25 on the two elastic arms 18 of the inner shell 3, and the elastic arms 18 undergo elastic deformation, pressing the elastic arms 18 toward the inner shell 3, and the wedge block 16 moves toward the central axis of the inner shell 3, and the wedge block 16 enters the inner shell 3, so that the wedge block 16 is separated from the locking window 15, and the limiting effect on the slider 9 is released. At this time, the slider 9 moves to the end of the motion range toward the rear end, and the spring 8 returns to the relaxed state.

[0093] Design Features

[0094] 1) The pre-relaxed MPO optical fiber connector of the present application solves the problem of rapid wear of the guide pin hole of the traditional MPO optical fiber connector and is an enhanced version of the MPO optical fiber connector.

[0095] 2) As an MPO optical fiber connector, the pre-relaxed MPO optical fiber connector of the present application uses a standard MPO adapter.

[0096] 3) Efficient design:

[0097] The pre-relaxed MPO optical fiber connector of the present application proposes a working principle of spring pre-relaxation to solve the problem of rapid wear of the MT ferrule pinhole. The spring force can be controlled, and when the MPO adapter is inserted, the spring of the MPO connector has basically no elastic force, so that the wear of the pinhole on the MT pinhole is minimized.

[0098] The MPO connector with a spring force control member needs to be designed as a component as small as possible. The action of controlling the spring force should be completed instantly for easy use. These requirements are fully met by the annular slider 9 and the elastic arm 18 on the inner shell 3. The MPO connector of the present application is only slightly larger in size and length than the traditional MPO connector.

[0099] 4) Assembly flexibility:

[0100] The design of the pre-relaxed MPO optical fiber connector of the present application optimizes the convenience of assembly as much as possible. The various parts required are avoided from being pre-installed on the optical fiber harness as much as possible, but can be "flying" into the connector during assembly.

[0101] i) A discrete dual spring is used instead of the conventional single spring.

[0102] ii) The annular design of the slider 9 allows the MT ferrule and the optical fiber bundle to pass through directly.

[0103] iii) The through slot 30 of the rear housing 10 and the rear housing sealing block 20 allow the optical fiber bundle to “fly into” the center of the rear housing.

[0104] This brings flexibility to the product and makes it easier to produce. There is no influence of parts such as springs during processes such as core grinding, making the production process more convenient.

[0105] Example

[0106] The pre-relaxed MPO optical fiber connector components of the present application as shown in FIG. 10(A) and FIG. 10(B) have been prepared, and the use effect has been verified.

[0107] 1) In order to verify the effect of the pre-relaxed MPO fiber optic connector of the present application on extending the service life, the MT ferrule is made into a non-contact MT ferrule (the fiber end face is recessed and polished, and the fiber end face is coated with an anti-reflection film), and then assembled into the MPO fiber optic connector component of the present application to make an MPO fiber optic connector jumper.

[0108] We tested the insertion loss of 10 pairs of MPO fiber optic connector jumpers made in this way and found that after 1500 plugging and unplugging, the insertion loss was less than the preset 0.5dB standard.

[0109] In contrast, using standard MPO fiber optic connector components (such as Figure 1 and Figure 2 The plugging and unplugging life of the non-contact MPO fiber optic connector jumper with the same non-contact MT ferrule varies, ranging from 100 times to 800 times.

[0110] This shows that the pre-relaxed MPO optical fiber connector of the present application significantly improves the life of the MPO optical fiber connector.

[0111] 2) In order to verify the improvement of the pre-relaxed MPO fiber optic connector of the present application over the standard MPO fiber optic connector, we used a contact MT ferrule, assembled it into the pre-relaxed MPO fiber optic connector of the present application, tested the insertion loss of the MPO fiber optic connector jumper, and compared it with the standard MPO fiber optic connector.

[0112] The results show that the change in insertion loss of the standard MPO fiber connector is 2.3 times that of the pre-relaxed MPO fiber connector. The improvement of the performance of the pre-relaxed MPO fiber connector is equally applicable to both non-contact MPO fiber connectors and contact MPO fiber connectors.

[0113] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A pre-relaxed MPO optical fiber connector component, characterized in that: It includes: A ferrule, which can accommodate an optical fiber, and an end face of the optical fiber is terminated at a front end of the ferrule; An inner housing, which is sleeved on the insert and can limit the insert; A guide needle bracket, which is arranged at the rear end of the insert; A spring, which is arranged at the rear end of the guide needle bracket and can provide elastic force to the guide needle bracket; The rear shell is located at the rear end of the inner shell and is used for docking with the inner shell; The component used for repeatedly controlling the expansion and contraction of the spring comprises: a moving component located at the rear end of the ferrule and capable of moving along the extending direction of the optical fiber bundle, wherein the moving component can compress the spring.

2. The optical fiber connector component according to claim 1, characterized in that: The component for repeatedly controlling the expansion and contraction of the spring also includes: A fixed component capable of controlling the motion of a moving component.

3. The optical fiber connector component according to claim 2, characterized in that: The moving component is sleeved on the inner shell, and the spring is arranged between the guide needle bracket and the moving component.

4. The optical fiber connector component according to claim 2, characterized in that: The moving component comprises a slider which is an annular structure and is sleeved on the outer surface of the inner shell. A locking window is provided on the inner surface of the slider. The fixing component comprises a wedge block.

5. The optical fiber connector component according to claim 4, characterized in that: An extension arm is arranged on the inner surface of the slider, and the extension arm extends to the inside of the inner shell near the optical fiber harness. A sliding groove for the extension arm to slide is provided on the inner shell, and the extension arm is connected to the spring.

6. The optical fiber connector component according to claim 5, characterized in that: The spring comprises two springs arranged on both sides of the optical fiber bundle, and the two ends of each spring are respectively connected to the extension arm and the guide pin bracket. A spring guide column for limiting the spring is arranged on the guide pin bracket, and the spring is sleeved on the spring guide column.

7. The optical fiber connector component according to claim 4, characterized in that: The wedge block is mounted on an elastic arm capable of elastic deformation and arranged on the inner shell; preferably, the wedge block is an inclined surface on the side close to the slider, and the wedge block is a plane roughly perpendicular to the optical fiber bundle on the side away from the slider; preferably, two elastic arms and wedge blocks are provided.

8. The optical fiber connector component according to claim 7, characterized in that: An outer shell capable of pressing down the elastic arm is sleeved on the inner shell, and preferably a return spring is arranged inside the outer shell.

9. The optical fiber connector component according to claim 5, characterized in that: The sliding groove passes through the rear end surface of the inner shell in its extending direction; the rear shell can limit the sliding block, and the rear shell and the inner shell are detachably connected.

10. The optical fiber connector component according to claim 1, characterized in that: A through slot capable of delivering the optical fiber harness into the rear housing is provided on the rear housing, and a rear housing sealing block capable of engaging with the through slot is provided on the rear housing.

11. The optical fiber connector component according to claim 1, characterized in that: The optical fiber connector component further comprises: a crimping ring, which is arranged at the rear end of the rear housing, and a tail sleeve, which is sleeved on the crimping ring.

12. A pre-relaxed MPO optical fiber connector, characterized in that: include: a first connector component; a second connector component having a guide pin; The first connector component and / or the second connector component is a connector component according to any one of claims 1-11.

13. The optical fiber connector according to claim 12, characterized in that: A guide pin hole is provided on the insert core of the second connector component, and the guide pin passes through the guide pin hole.

14. The optical fiber connector according to claim 12, characterized in that: Also included is an adapter for securing the first connector component and the second connector component.

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