Pre-relaxed optical fiber connector

Abstract

Disclosed in the present invention is a pre-relaxed optical fiber connector, comprising a ferrule assembly, an outer shell, an inner shell, a spring, a stopper, a sliding block and a push-pull block, wherein one end of the spring abuts against the ferrule assembly, and the other end of the spring abuts against the sliding block; the sliding block can change the length of the spring so as to press tightly against the ferrule assembly, and is fixed to the inner shell to press tightly against the ferrule assembly; and the push-pull block can push the sliding block to move, and the push-pull block can slide by a certain distance relative to the outer shell and can drive the outer shell to move. In the pre-relaxed optical fiber connector of the present invention, the push-pull block has a push-pull integrated operation function, thereby simplifying operation steps and also avoiding the situation where a user forgets the second-step operation due to carelessness during the use of the pre-relaxed optical fiber connector; in addition, the coupling and unlocking of the pre-relaxed optical fiber connector are implemented by pushing and pulling the same component, such that the use of the pre-relaxed optical fiber connector is easier and more straightforward, and it is easier for the user to learn how to use the optical fiber connector.

Description

[Corrected 21.01.2025 according to Rule 26] A pre-relaxed optical fiber connector Technical Field

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

[0002] Multi-fiber connectors are reusable connectors used for connecting optical fibers. They utilize high-precision components to achieve micron-level precision connections. MPO fiber connectors are the most common type of multi-fiber connector.

[0003] A multi-fiber connector typically consists of two connectors, male and female, and an adapter. The connector with the guide pin is called the male connector, and the connector that mates with the guide pin is called the female connector. The adapter fits over the joint between the two connectors to secure them in place. The guide pins are used to position the connectors.

[0004] As shown in Figure 1, CN 218824799 U includes a pre-relaxed optical fiber connector, which includes a ferrule assembly, an outer shell, an inner shell, a reset spring, a slider, a stopper, a tail sleeve, and a spring. The outer shell is sleeved on the inner shell and can slide along the inner shell. The outer shell and the inner shell have reset springs, which enable the outer shell to have a reset function. The stopper passes through the hollow part of the slider and is clamped to the inside of the inner shell, so that the various components of the connector form a whole. The slider has a clamping window, the inner shell has an elastic arm, and the elastic arm has a wedge block. After the ferrule assembly is docked, the slider is pushed forward, the slider presses the wedge block, the elastic arm is deformed, the clamping window is clamped into the wedge block, the slider is fixed to the inner shell, and the slider presses the spring, which cannot move backward. At this time, one end of the spring abuts the ferrule assembly and the other end abuts the slider, and the ferrule is pushed tight. During this docking process, when the connector is inserted into the adapter for docking, the ferrule is not pushed tight, and the ferrule is relatively flexible, which facilitates docking. After docking is completed, the slider is pushed, and the ferrule is pushed tight, so that the docking connection of the ferrule is more secure.

[0005] However, mating these fiber optic connectors requires a two-step process: first, pinching the boot to push the connector into the adapter, and second, pushing the slider to tighten the ferrule. In reality, users often rely on conventional, non-pre-relaxed fiber optic connectors, which only require this one-step process. This habit can lead them to forget the second step of tightening the ferrule when using pre-relaxed fiber optic connectors. If this second step is omitted, the two ferrules remain relatively free, severely impacting mating performance and leading to high insertion loss and unstable signal transmission.

[0006] Therefore, a fiber optic connector is needed that can achieve the above two steps in just one operation. Summary of the Invention

[0007] The present invention provides a pre-relaxed optical fiber connector to solve the problem that the user forgets the second step operation when using the pre-relaxed optical fiber connector, thereby affecting the docking performance of the docking ferrule.

[0008] A pre-relaxed optical fiber connector includes a ferrule assembly, an outer shell, an inner shell, a spring, a stopper, a slider, a pressure ring, and a push-pull block;

[0009] The ferrule assembly includes a ferrule body and an optical fiber, and the optical fiber is arranged in the optical fiber hole of the ferrule body;

[0010] The inner housing is sleeved on the outside of the ferrule assembly and limits the ferrule assembly, and the inner housing includes a first clamping portion that docks with the adapter;

[0011] The outer shell is sleeved on the outer side of the inner shell, the stopper is fixedly engaged with the inner shell, the optical fiber passes through the stopper, and the pressure ring is arranged at the rear end of the stopper and is crimped on the outer periphery of the optical fiber;

[0012] One end of the spring abuts against the ferrule assembly, and the other end of the spring abuts against the slider;

[0013] The slider can change the length of the spring to push the insert assembly tightly and fix it to the inner housing;

[0014] The push-pull block abuts against the slider and can push the slider to move;

[0015] The push-pull block can push the slider to move, and the push-pull block can slide a certain distance relative to the outer shell and drive the outer shell to move.

[0016] Furthermore, the push-pull block includes a push-pull block body and an extension arm arranged on one side of the push-pull block body, the extension arm extends into the interior of the outer shell, and the end of the extension arm has a first hook. The push-pull block can slide along the sliding area inside the outer shell, and a blocking part is provided at the end of the sliding area.

[0017] Furthermore, a protrusion is provided in the sliding area, and the protrusion can hook the first hook.

[0018] Furthermore, the slider includes slots provided on opposite sides, and the extension arm passes through the slots.

[0019] Furthermore, the inner shell has an elastic arm, the elastic arm has a second hook, the slider includes a contact portion contacting the spring and a window arranged on the side, and the window and the second hook are engaged with each other to fix the slider and the inner shell.

[0020] Furthermore, the inner wall of the outer shell further includes a raised first inclined surface, and the elastic arm is provided with a raised second inclined surface.

[0021] Furthermore, the push-pull block includes a mounting groove, and the sliding block abuts against the mounting groove.

[0022] Furthermore, a reset elastic member is provided at the socketed portion of the outer shell and the inner shell, the socketed portion on the inner side of the outer shell includes a first abutting portion, and the socketed portion on the outer side of the inner shell includes a second abutting portion, and the first abutting portion and the second abutting portion respectively abut against the two ends of the reset elastic member.

[0023] Furthermore, a pre-relaxed optical fiber connector also includes a push-pull tail sleeve, which is arranged on the outer circumference of the optical fiber and can be pushed and pulled back and forth along the pressure ring and the optical fiber; the push-pull tail sleeve is fixedly connected to the push-pull block.

[0024] Furthermore, the push-pull tail sleeve also includes a through hole, a fixing groove is provided on the inner wall of the through hole, and the push-pull block body also includes a fixing part, a fixing hook is provided on the fixing part, and the fixing hook is engaged with the fixing groove.

[0025] Furthermore, the fixing portion further includes a fixing protrusion, and a hole of a corresponding shape is correspondingly provided on the push-pull tail sleeve, and the fixing protrusion is arranged inside the hole.

[0026] Furthermore, the insert assembly also includes a guide column, a first guide column hole is provided on the abutting portion, a guide column fixing hole is provided on the stopper, the guide column hole is a through hole, a guide column is passed through the spring, one end of the guide column is fixed on the needle holder of the insert assembly, the guide column passes through the guide column hole, and the other end of the guide column is fixed in the guide column fixing hole, and the slider can slide along the guide column.

[0027] Furthermore, there are two springs, which are respectively arranged on both sides of the optical fiber. Beneficial effects

[0028] Compared to pre-relaxed fiber optic connectors in the prior art, the push-pull block of the present invention can move independently and is linked to the outer shell. By pinching the push-pull block and pushing it forward, the user can simultaneously complete the two steps of inserting the pre-relaxed fiber optic connector and tightening the ferrule.

[0029] The user pinches the push-pull block and pulls it backwards. The push-pull block first detaches from the outer shell, then drives the outer shell backward, thereby releasing the inner shell from the slider, and then releasing the pre-relaxed fiber optic connector from the adapter. This allows the push-pull block to have an integrated push-pull operation function, which simplifies the use of the pre-relaxed fiber optic connector and prevents the user from forgetting the second step due to carelessness when operating the pre-relaxed fiber optic connector. On the other hand, the docking and unlocking of the pre-relaxed fiber optic connector are both achieved by pushing and pulling the same component, making the use of the pre-relaxed fiber optic connector simpler and more direct, and easier for users to learn and use.

[0030] In addition, the push-pull tail sleeve is fixedly connected to the push-pull block, which extends the length of the integrated push-pull component, making it easier for users to plug and unplug the pre-relaxed optical fiber connector of the present invention in a high-density optical fiber connector array, and overcoming the problem that when the pre-relaxed optical fiber connector of the present invention is used in a high-density optical fiber connector array, the gap between the connectors is small, and it is difficult for fingers to reach into the gap and operate the push-pull block. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] FIG1 is a schematic structural diagram of a pre-relaxed optical fiber connector in the prior art;

[0033] FIG2 is a schematic structural diagram of a pre-relaxed optical fiber connector according to the present invention;

[0034] FIG3 is a schematic structural diagram of a ferrule assembly in an embodiment of the present invention;

[0035] FIG4 is a schematic diagram of the assembly of the inner housing, the outer housing, and the resetting elastic member in an embodiment of the present invention;

[0036] FIG5 is a schematic structural diagram of an adapter in an embodiment of the present invention;

[0037] FIG6 is a schematic structural diagram of an inner shell in an embodiment of the present invention;

[0038] 7 is a schematic structural diagram of an outer shell in an embodiment of the present invention;

[0039] FIG8 is a schematic diagram of the assembly of the outer shell, the push-pull block, and the push-pull tail sleeve in an embodiment of the present invention;

[0040] 9 is a schematic structural diagram of a push-pull block in an embodiment of the present invention;

[0041] FIG10 is a schematic structural diagram of a push-pull tail sleeve in an embodiment of the present invention;

[0042] 11 is a schematic structural diagram of a slider in an embodiment of the present invention;

[0043] FIG12 is a schematic structural diagram of a stopper in an embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 100. Pre-relaxed fiber optic connector; 1. Ferrule assembly; 11. Ferrule body; 12. Guide pin; 13. Pin holder; 14. Guide post; 2. Reset elastic member; 3. Outer shell; 31a / 31b, first abutment; 32. Blocking portion; 33. Raised portion; 34. First inclined surface; 4. Inner shell; 41a / 41b, second abutment; 42. First engaging portion; 43. Elastic arm; 431, second hook; 4311, chamfer; 432, second inclined surface; 5. Spring; 6. Stopper; 61, Guide post fixing hole; 7. Slider; 71, Abutment Part; 711, first guide column hole; 72, window; 73, groove; 8, pressure ring; 9, push-pull block; 91, push-pull block body; 92a / 92b, extension arm; 921a / 921b, first hook; 93a / 93b, fixing part; 931a / 931b, fixing hook; 932a / 932b, fixing protrusion; 94, mounting groove; 10, push-pull tail sleeve; 101, through hole; 102, fixing groove; 103, hole; 104, flexible tail end; 1041, notch; 200, adapter; 21, docking part; 22, docking channel. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0049] The pre-relaxed optical fiber connectors of the present invention are described below. Example

[0050] This embodiment provides a pre-relaxed optical fiber connector 100, as shown in Figure 2-12, including a core assembly 1, a reset elastic member 2, an outer shell 3, an inner shell 4, a spring 5, a stopper 6, a slider 7, a pressure ring 8, a push-pull block 9, and a push-pull tail sleeve 10.

[0051] This connector is a male connector. The ferrule assembly 1 includes a ferrule body 11, guide pins 12, a pin holder 13, a guide post 14, and an optical fiber (not shown in the figures). The optical fiber is positioned within the fiber hole of the ferrule body. The difference between a female connector and a male connector is that the female connector's ferrule assembly lacks a guide pin.

[0052] The inner housing 4 is sleeved on the outside of the ferrule assembly 1 and limits the ferrule assembly 1 . The stopper 6 is fixedly engaged with the inner housing 4 , and the optical fiber passes through the stopper 6 .

[0053] Connector and adapter docking

[0054] The outer shell 3 is sleeved on the outside of the inner shell 4. A reset elastic member 2 is provided at the sleeved portion of the outer shell 3 and the inner shell 4. After the outer shell 3 moves backward under force, the reset elastic member 2 can restore the outer shell 3 to its initial position.

[0055] The sleeved portion on the inner side of the outer shell 3 includes a first abutting portion 31a / 31b, and the sleeved portion on the outer side of the inner shell 4 includes a second abutting portion 41a / 41b. The first abutting portion 31a / 31b and the second abutting portion 41a / 41b respectively abut against the ends of the return elastic member 2. In this example, the first abutting portion 31a / 31b abuts against the upper side of the return elastic member 2, and the second abutting portion 41a / 41b abuts against the lower side of the return elastic member 2.

[0056] The inner housing 4 has a first engaging portion 42, which engages with the docking portion 21 of the adapter 200. The outer housing 3 then wraps around the docking portion 21, completing the connection between the connector and the adapter. When the outer housing 3 is forced back, it no longer wraps around the docking portion 21, allowing the docking portion 21 and the first engaging portion 42 to separate under the tensile force.

[0057] When the pre-relaxed optical fiber connector 100 is docked with the adapter 200, the pre-relaxed optical fiber connector 100 enters the docking channel 22, and the docking portion 21 of the adapter 200 is pushed open by the inner shell 4, and then the outer shell 3 hits the docking portion 21, the outer shell 3 is pushed back, and the pre-relaxed optical fiber connector 100 is continued to be pushed forward, and the docking portion 21 is engaged with the first clamping portion 42 of the inner shell, and the docking portion 21 returns to its normal width and no longer presses against the outer shell 3. The outer shell 3 bounces back to its original position under the action of the reset elastic member 2. At this time, the outer shell 3 wraps around the docked first clamping portion 42, and the first clamping portion 42 cannot widen and disengage from the docking portion 21, and the pre-relaxed connector 100 and the adapter 200 are docked.

[0058] Pre-relaxation and tightening of the ferrule body

[0059] The push-pull block 9 is arranged on the periphery of the stopper 6. The push-pull block 9 includes a push-pull block body 91. An extension arm 92a / 92b arranged on one side of the push-pull block body 91 extends into the interior of the outer shell 3. The end of the extension arm 92a / 92b has a first hook 921a / 921b. The push-pull block 9 can slide along the sliding area inside the outer shell 3. A blocking portion 32 is provided at the end of the sliding area. The blocking portion 32 can block the first hook 921a / 921b to prevent the extension arm 92a / 92b from detaching from the outer shell 3; a protrusion 33 is provided in the sliding area, and the protrusion 33 can hook the first hook 921a / 921b.

[0060] When the push-pull block 9 is pushed inward along the outer shell 3, the extension arm 92a / 92b elastically deforms and then rebounds. At this time, the first hook 921a / 921b hooks the protrusion 33, and the push-pull block body 91 presses against the end of the outer shell 3, and the push-pull block 9 is fixed relative to the outer shell 3.

[0061] The push-pull tail sleeve 10 includes a through hole 101. After the pressure ring 8 is crimped onto the optical fiber, the push-pull tail sleeve 10 is sleeved onto the pressure ring 8 and the outer periphery of the optical fiber. The push-pull tail sleeve 10 can be pushed and pulled back and forth along the pressure ring 8 and the optical fiber, with the pressure ring 8 located within the through hole 101. The push-pull tail sleeve 10 is sleeved onto the outer side of the push-pull block 9. The two are fixedly connected to form a single assembly that moves together. The fixed connection between the push-pull tail sleeve and the push-pull block extends the length of the integrated push-pull component, making it easier for users to insert and remove the pre-relaxed optical fiber connector of the present invention in a high-density optical fiber connector array. This overcomes the problem that when the pre-relaxed optical fiber connector of the present invention is used in a high-density optical fiber connector array, the gaps between the connectors are small, making it difficult for fingers to reach into the gaps and operate the push-pull block.

[0062] More specifically, the push-pull boot 10 has a certain degree of elasticity, allowing it to be clipped onto the push-pull block 9 under the action of external force, forming a secure connection. The other side of the push-pull block body 91 has a fixing portion 93a / 93b, which has a fixing hook 931a / 931b. The inner wall of the through hole 101 of the push-pull boot 10 has a fixing groove 102, which clips into the fixing hook 931a / 931b.

[0063] Due to the snap-fit ​​connection between the fixing groove 102 and the fixing hooks 931a / 931b, the push-pull sleeve 10 is still subject to circumferential twisting along the optical fiber axis. Therefore, the fixing portions 93a / 93b further include fixing protrusions 932a / 932b, and the push-pull sleeve 10 is provided with a correspondingly shaped hole 103. The hole 103 is a through hole, and the fixing protrusion 932 is disposed within the hole 103. This arrangement not only enhances the fixing stability of the push-pull sleeve 10 and the push-pull block 9, preventing the push-pull sleeve 10 from rotating and affecting the user's feel, but also provides an indicator to remind the user whether the push-pull sleeve 10 and the push-pull block 9 are properly connected.

[0064] The push-pull block 9 has a mounting groove 94 inside, against which one side of the slider 7 abuts. As shown in FIG10 , the slider 7 includes an abutment portion 71 for abutting the spring 5, windows 72 on two opposing sides, and grooves 73 on two other opposing sides. Extension arms 92a / 92b pass through the grooves 73, allowing the slider 7 to slide up and down relative to the push-pull block 9 along the extension arms 92a / 92b.

[0065] The abutment portion 71 abuts against one end of the spring 5, and the other side of the spring 5 abuts against the ferrule assembly; therefore, when the push-pull block 9 is pushed tightly, the push-pull block 9 pushes against the slider 7 to move, and the slider 7 presses the spring 5. The spring is stressed and pushes the ferrule assembly 1, so that the ferrule can remain stable during use.

[0066] In another embodiment, the abutment portion 71 further includes a first guide post hole 711, the stopper 6 includes a guide post fixing hole 62, and the guide post hole 711 is a through hole. A guide post 14 is inserted into the spring 5, one end of which is fixed to the needle holder 13 of the ferrule assembly 1. The guide post 14 passes through the guide post hole 711, and the other end of the guide post 14 is fixed to the guide post fixing hole 62, so that the slider can slide along the guide post 14. This makes the spring more stable during compression and also increases the stability of the slider and the push-pull block during movement.

[0067] The inner shell 4 has an elastic arm 43, and a second hook 431 is provided on the elastic arm 43. The second hook 431 has a chamfer 431. When the slider 7 is pushed in, the slider presses the chamfer 4311, and the elastic arm 43 is deformed and extends into the interior of the slider 7. The slider 7 is further pushed in, and the second hook 431 rebounds to the window 72 and is engaged in the window 72. At this time, the engagement between the second hook 431 and the window 72 can prevent the slider from retreating, and the ferrule is pushed tight.

[0068] After the male connector is installed into the adapter, the female connector is inserted into the adapter. The female connector's ferrule is always in a state of no stress or slight stress. The guide pin on the male connector's ferrule can easily adjust the relatively offset female connector's ferrule, so that the two connector ferrules are in a good docking position, facilitating accurate docking between the two ferrules.

[0069] As the push-pull sleeve 10 pushes the push-pull block 9 along the outer housing 3, the slider 7 is also pushed forward by the push-pull block 9, and the spring 5 begins to apply pressure to the ferrule body 11, which presses against the inner side of the inner housing 4. The push-pull sleeve 10 continues to push the push-pull block 9, which engages with the protrusion 33 inside the outer housing 3. Continuing to push, the slider 7 engages with the elastic arm 43 of the inner housing 4. After releasing the thrust, the slider cannot retreat, completing the ferrule tightening operation. At this time, the ferrules of the two connectors are precisely docked and both are tightened.

[0070] In this way, the two steps of "adapter docking" and "ferrule pre-relaxation and tightening" can be completed in one operation.

[0071] Undocking the ferrule

[0072] When the connection between the two ferrules needs to be disconnected and the connector needs to be pulled out of the adapter 200, it is only necessary to pull the push-pull tail sleeve 10. The push-pull tail sleeve 10 drives the push-pull block 9 to overcome the resistance of the engagement with the outer shell 3 and slide to the end of the sliding area in the outer shell 3. At this time, due to the interference between the push-pull block 9 and the outer shell 3, the push-pull tail sleeve 10 is continued to be pulled, and the push-pull tail sleeve 10 drives the outer shell 4 to move backward through the push-pull block 9;

[0073] When the outer shell 3 moves backward, the raised first inclined surface 34 inside will press the raised second inclined surface 432 on the elastic arm 43 of the inner shell 4, forcing the elastic arm 43 to bend and deform inward. At this time, the second hook 431 on the elastic arm 43 is disengaged from the window 72 on the slider 7, and the slider 7 rebounds to the mounting groove 94 of the push-pull block 9 under the thrust of the spring 5.

[0074] Continue to pull the push-pull tail sleeve 10 backward, and the push-pull tail sleeve 10 continues to drive the outer shell 3 to move backward. The outer shell 3 no longer wraps the docking portion 21 of the adapter 200. At this time, the adapter 200 and the inner shell 4 can be opened under external tension.

[0075] In this way, the ferrule assembly 1 can be loosened and the optical fiber connector can be removed from the adapter in one go by simply pulling the push-pull boot 10. Furthermore, since the slider 7 is pushed into the outer shell 3 when the ferrule is in the tightened state, and is exposed from the outer shell 3 when the ferrule is in the relaxed state, the slider 7 can be set to a special color to indicate whether the ferrule is in the tightened state.

[0076] In addition, the push-pull tail sleeve 10 also includes a flexible tail end 104, which is wrapped around the optical fiber. A plurality of notches 1041 are provided on the outer surface of the flexible tail end 104. The notches 1041 are arranged in multiple directions on the outer surface of the flexible tail end 104 so that the flexible tail end 104 can allow the optical fiber to bend at a certain angle, thereby avoiding damage to the optical fiber due to excessive bending angles.

[0077] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A pre-relaxed optical fiber connector, characterized in that: Including the insert assembly, outer shell, inner shell, spring, stopper, slider, push-pull block, The inner housing is sleeved on the outside of the ferrule assembly and limits the ferrule assembly. The inner housing includes a first clamping portion that docks with the adapter. The outer shell is sleeved on the outside of the inner shell, the stopper is fixedly engaged with the inner shell, and the optical fiber passes through the stopper. One end of the spring abuts against the ferrule assembly, and the other end of the spring abuts against the slider. The slider can change the length of the spring to push the insert assembly, and can be fixed to the inner shell. The push-pull block can push the slider to move, and the push-pull block can slide a certain distance relative to the outer shell and drive the outer shell to move.

2. A pre-relaxed optical fiber connector according to claim 1, characterized in that: The push-pull block includes a push-pull block body and an extension arm arranged on one side of the push-pull block body. The extension arm extends into the interior of the outer shell. The end of the extension arm has a first hook. The push-pull block can slide along the sliding area inside the outer shell. The end of the sliding area is provided with a blocking part.

3. The pre-relaxed optical fiber connector according to claim 1, wherein: A protrusion is provided in the sliding area, and the protrusion can hook the first hook.

4. The pre-relaxed optical fiber connector according to claim 1, wherein: The slider includes slots provided on opposite sides, and the extension arms pass through the slots.

5. The pre-relaxed optical fiber connector according to claim 1, wherein: The inner shell has an elastic arm, and the elastic arm has a second hook. The slider includes an abutting portion abutting the spring and a window arranged on the side. The window and the second hook are engaged with each other to fix the slider and the inner shell.

6. The pre-relaxed optical fiber connector according to claim 5, wherein: The inner wall of the outer shell further includes a raised first inclined surface, and the elastic arm is provided with a raised second inclined surface.

7. The pre-relaxed optical fiber connector according to claim 1, wherein: The push-pull block includes a mounting groove, and the sliding block abuts against the mounting groove.

8. The pre-relaxed optical fiber connector according to any one of claims 1 to 7, wherein: The socket connection portion between the outer shell and the inner shell is provided with a reset elastic member, the socket connection portion inside the outer shell includes a first abutment portion, and the socket connection portion outside the inner shell includes a second abutment portion, and the first abutment portion and the second abutment portion respectively abut against the two ends of the reset elastic member.

9. The pre-relaxed optical fiber connector according to claim 1, wherein: It also includes a push-pull tail sleeve, which is arranged on the outer periphery of the optical fiber. The push-pull tail sleeve can be pushed and pulled back and forth along the optical fiber, and the push-pull tail sleeve is fixedly connected to the push-pull block.

10. The pre-relaxed optical fiber connector according to claim 9, wherein: The push-pull tail sleeve further includes a through hole, a fixing groove is provided on the inner wall of the through hole, and the push-pull block body further includes a fixing portion, a fixing hook is provided on the fixing portion, and the fixing hook is engaged with the fixing groove.

11. The pre-relaxed optical fiber connector according to claim 10, wherein: The fixing portion further includes a fixing protrusion. A hole of a corresponding shape is correspondingly provided on the push-pull tail sleeve, and the fixing protrusion is arranged inside the hole.

12. The pre-relaxed optical fiber connector according to claim 1, wherein: The insert assembly also includes a guide column, a first guide column hole is provided on the abutting portion, a guide column fixing hole is provided on the stopper, the guide column hole is a through hole, a guide column is passed through the spring, one end of the guide column is fixed on the needle holder of the insert assembly, the guide column passes through the guide column hole, and the other end of the guide column is fixed in the guide column fixing hole, and the slider can slide along the guide column.

13. The pre-relaxed optical fiber connector according to claim 12, wherein: There are two springs, which are respectively arranged on both sides of the optical fiber.

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