Push-pull device for fiber optic connectors and fiber optic connectors

Abstract

This application relates to the field of fiber optic connector technology, and discloses a push-pull device for fiber optic connectors, comprising: a housing, which is drivenly connected to a ferrule; and a tail sleeve, which is connected to the housing via at least two cross-limiting structures, wherein the at least two cross-limiting structures are asymmetrically distributed in the vertical direction about the axis of the push-pull device; wherein, when the tail sleeve is pushed or pulled, the housing and the ferrule can move along the axis of the push-pull device. The asymmetrical cross-limiting structures can form staggered constraint forces in the radial and axial directions, effectively suppressing tilting or torsion of the housing and tail sleeve due to unilateral force. Furthermore, the asymmetrical distribution can disperse the push-pull force in different directions, avoiding stress concentration or local wear caused by symmetrical structures, reducing loosening or jamming caused by external forces or improper operation, and improving the stability and reliability of the connection between the tail sleeve and the housing. This application also discloses a fiber optic connector.

Description

Technical Field

[0001] This application relates to the field of fiber optic connector technology, such as a push-pull device for fiber optic connectors and fiber optic connectors. Background Technology

[0002] Currently, with the rapid development of 5G communication, artificial intelligence, the Internet of Things, and big data technologies, the demand for fiber optic network bandwidth and port density from hyperscale data centers and cloud service providers is growing exponentially. Against this backdrop, MPO (Multi-Fiber Push-On) connectors, with their high-density integration characteristics, have become a mainstream solution for optimizing cabling space and increasing port density. However, as the density of optical distribution frames continues to rise, connector spacing has been compressed to the millimeter level, making MPO connector insertion and removal difficult. On high-density distribution frames, due to limited space, MPO connectors are currently typically inserted and removed directly by hand or with the aid of specific tools to reach into the middle frame. However, directly inserting and removing MPO connectors by hand or with specific tools not only increases the difficulty and complexity of the operation but may also cause compression, affecting the normal use of other fiber optic connectors.

[0003] The related technology discloses an MPO connector that uses a tail sleeve for unlocking. The MPO connector includes a housing assembly and a tail sleeve. The housing assembly includes an inner housing and an outer housing. The inner housing has a ferrule and a spring. A spring limit seat is fixed on the inner housing. The rear end of the spring limit seat has a cable crimping section. The tail sleeve is fitted onto the cable crimping section. The front end of the tail sleeve is connected to the outer housing to pull the outer housing backward.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] The adoption of relevant technologies has reduced the impact on other fiber optic connectors when inserting and removing MPO connectors on high-density patch panels to some extent. However, in practical applications, a snap-fit ​​is usually installed on the housing. Frequent pushing and pulling of the tail sleeve for insertion and removal may concentrate the force between the tail sleeve and the housing on the snap-fit ​​part. When a pushing or pulling force is applied, the snap-fit ​​may deform or shift due to uneven force, making the connection structure between the tail sleeve and the housing prone to jamming or loosening during the pushing and pulling process. This results in insufficient axial movement between the housing and the tail sleeve, requiring repeated adjustment of the tail sleeve angle to achieve effective transmission, increasing the complexity of operation.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a push-pull device and a fiber optic connector for use with fiber optic connectors, which improves the stability and reliability of the connection between the tail sleeve and the housing during the insertion and removal of MPO connectors on high-density patch panels, and solves the problem of loosening or jamming caused by unstable connection between the tail sleeve and the housing.

[0009] In some embodiments, the push-pull device for the fiber optic connector includes: a housing, which is drivenly connected to the ferrule; and a tail sleeve, which is connected to the housing via at least two cross-limiting structures, wherein the at least two cross-limiting structures are asymmetrically distributed in the vertical direction about the axial direction of the push-pull device; wherein, when the tail sleeve is pushed or pulled, the housing and the ferrule can be moved along the axial direction of the push-pull device.

[0010] Optionally, the cross-limiting structure includes: a first protrusion structure disposed on the side wall of the housing; and a second protrusion structure disposed on the side wall of the tail sleeve; wherein the projections of the first protrusion structure and the second protrusion structure on the axial direction of the push-pull device at least partially overlap.

[0011] Optionally, at least two of the first protrusions of the intersecting limiting structures have different tilt angles; and / or, at least two of the second protrusions of the intersecting limiting structures have different tilt angles.

[0012] Optionally, the first protruding structure and the second protruding structure can move relative to each other; wherein, when the first protruding structure and the second protruding structure are closest to each other, pulling the tail sleeve can drive the outer shell and the insert to move along the axial direction of the push-pull device, and when the first protruding structure and the second protruding structure are farthest from each other, pushing the tail sleeve can drive the outer shell and the insert to move along the axial direction of the push-pull device.

[0013] Optionally, the cross-limiting structure further includes: a first opening disposed on the side wall of the outer shell, and a first protrusion structure disposed on the side of the first opening near the tail sleeve; a second opening disposed on the side wall of the tail sleeve, and a second protrusion structure disposed on the side of the second opening near the outer shell; wherein, when the outer shell and the tail sleeve are connected, the first protrusion structure and the second protrusion structure are located in the second opening and the first opening respectively, and when the tail sleeve is pushed or pulled, the first protrusion structure and the second protrusion structure can slide in the second opening and the first opening respectively.

[0014] Optionally, at least two of the first openings of the intersecting limiting structures have different axial position offsets; and / or, at least two of the second openings of the intersecting limiting structures have different axial position offsets.

[0015] Optionally, at least two intersecting limiting structures are diagonally distributed about the axial section of the push-pull device.

[0016] Optionally, at least two cross-limiting structures are respectively disposed on two diagonally opposite side walls.

[0017] Optionally, the tail sleeve includes a push-pull handle disposed at the end of the tail sleeve away from the outer casing; wherein the push-pull handle has one-way or multi-way elasticity on the side near the end.

[0018] In some embodiments, the fiber optic connector includes the push-pull device described above for the fiber optic connector.

[0019] The push-pull device and fiber optic connector for fiber optic connectors provided in this disclosure can achieve the following technical effects:

[0020] The push-pull device for fiber optic connectors includes a housing and a tail sleeve. The housing is driven to the ferrule. The tail sleeve is connected to the housing via at least two intersecting restraint structures, which are asymmetrically distributed perpendicular to the axis of the push-pull device. When the tail sleeve is pushed or pulled, the housing and ferrule can move along the axis of the push-pull device. The asymmetrical arrangement of the intersecting restraint structures creates staggered restraint forces in the radial and axial directions, effectively suppressing tilting or torsion of the housing and tail sleeve due to unilateral force. Furthermore, the asymmetrical distribution disperses the push-pull force in different directions, avoiding stress concentration or localized wear caused by symmetrical structures, reducing loosening or jamming caused by external forces or improper operation, and improving the stability and reliability of the connection between the tail sleeve and the housing.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is an exploded view of the fiber optic connector provided in an embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of a vertical cross-section of the fiber optic connector provided in this embodiment along its axis;

[0025] Figure 3 This is a schematic diagram of a horizontal cross-section of the fiber optic connector provided in this embodiment along its axis;

[0026] Figure 4This is a schematic diagram of the tail sleeve of an optical fiber connector provided in an embodiment of this disclosure;

[0027] Figure 5 This is a schematic diagram of the structure of the housing of an optical fiber connector provided in an embodiment of this disclosure;

[0028] Figure 6 This is a structural schematic diagram of the housing of an optical fiber connector provided in an embodiment of this disclosure from another perspective;

[0029] Figure 7 This is a schematic diagram of the inner shell structure of an optical fiber connector provided in an embodiment of this disclosure;

[0030] Figure 8 This is a schematic diagram of the inner spring push seat of an optical fiber connector provided in an embodiment of the present disclosure;

[0031] Figure 9 This is a schematic diagram of the structure of a ferrule provided in an embodiment of this disclosure;

[0032] Figure 10 This is a schematic diagram of the overall structure of an optical fiber connector provided in an embodiment of this disclosure.

[0033] Figure label:

[0034] 100: Outer shell; 101: First protruding structure; 102: First opening; 103: Outer shell return spring; 104: Barb;

[0035] 200: Tail sleeve; 201: Second protruding structure; 202: Second opening; 203: Push-pull handle; 204: U-shaped groove; 205: Aramid pressure ring; 206: Sheath pressure ring;

[0036] 300: Filament; 301: Guide pin; 302: Guide pin retainer; 303: Multi-core fiber optic jack; 304: Socket; 305: Limiting boss; 306: Limiting protrusion; 307: Multi-core fiber optic socket; 308: Guide through hole; 309: Glue injection opening; 310: Cable tray; 311: Spring receiving groove;

[0037] 400: Inner shell; 401: Snap-fit ​​groove; 402: Inner spring; 403: Inner spring push seat; 404: Stop; 405: Limiting step; 406: Snap-fit ​​groove; 407: Limiting flange; 408: Stop block; 409: Rear receiving groove; 410: Connecting groove; 411: Front receiving groove; 412: Stop part; 413: Positioning protrusion; 414: Positioning groove;

[0038] 500: Dust cap; Detailed Implementation

[0039] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0040] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0041] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0042] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0043] Unless otherwise stated, the term "multiple" means two or more.

[0044] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0045] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0047] In practical applications, a raised structure is usually only set on the tail sleeve. Frequent pushing and pulling of the tail sleeve may cause the force between the tail sleeve and the outer shell to concentrate on the raised part of the tail sleeve. When a pushing or pulling force is applied, the raised structure of the tail sleeve may deform or displace due to uneven force, which may cause the connection structure between the tail sleeve and the outer shell to jam or loosen during the pushing and pulling process. This results in insufficient axial movement between the outer shell and the tail sleeve, and the tail sleeve angle needs to be repeatedly adjusted during pushing and pulling to achieve effective transmission, which increases the complexity of operation.

[0048] Combination Figure 4-6 As shown in Figure 10, this embodiment of the present disclosure provides a push-pull device for an optical fiber connector, including a housing 100 and a tail sleeve 200. The housing 100 is drive-connected to the ferrule 300. The tail sleeve 200 is connected to the housing 100 via a cross-limiting structure, which includes a first protrusion structure 101 and a second protrusion structure 201 respectively disposed on the side wall of the housing 100 and the side wall of the tail sleeve 200. The projections of the first protrusion structure 101 and the second protrusion structure 201 on the axial direction of the push-pull device at least partially overlap. When the tail sleeve 200 is pushed or pulled, the housing 100 and the ferrule 300 can move along the axial direction of the push-pull device.

[0049] In the embodiments disclosed herein, such as Figure 2 and Figure 3 As shown by the dotted line, the axial direction of the push-pull device refers to the axial direction or moving direction of the housing 100 or the tail sleeve 200, or it can be the extension direction of the optical fiber within the optical fiber connector.

[0050] In this embodiment, the first protrusion structure 101 and the second protrusion structure 201 may be the same or different, as long as the first protrusion structure 101 and the second protrusion structure 201 form a cross-limiting structure when the outer shell 100 and the tail sleeve 200 are connected.

[0051] In the embodiments disclosed herein, such as Figure 4-6 As shown, the first protrusion 101 is disposed on the inner side of the side wall of the outer casing 100, and correspondingly, the second protrusion 201 is disposed on the outer side of the side wall of the tail sleeve 200. In this case, the tail sleeve 200 extends at least partially into the outer casing 100, thus connecting the tail sleeve 200 to the outer casing 100. In other embodiments, the first protrusion 101 may also be disposed on the outer side of the side wall of the outer casing 100, and correspondingly, the second protrusion 201 is disposed on the inner side of the side wall of the tail sleeve 200. In this case, the outer casing 100 extends at least partially into the tail sleeve 200, thus connecting the tail sleeve 200 to the outer casing 100.

[0052] In this embodiment, the projections of the first protrusion structure 101 and the second protrusion structure 201 on the axial direction of the housing 100 or the tail sleeve 200 can be completely overlapping or partially overlapping. In order to make the connection more stable, the first projection area of ​​the overlapping part of the first protrusion structure 101 and the second protrusion structure 201 on the axial direction of the push-pull device is not less than half of the second projection area of ​​the first protrusion structure 101 on the axial direction of the push-pull device, and / or not less than half of the third projection area of ​​the second protrusion structure 201 on the axial direction of the push-pull device.

[0053] The push-pull device for fiber optic connectors provided in this embodiment of the invention has a first protrusion structure 101 and a second protrusion structure 201 whose projections in the axial direction of the push-pull device at least partially overlap, forming a bidirectional limiting mechanism. This not only restricts the radial movement between the tail sleeve 200 and the outer shell 100, but also restricts their axial movement, thereby enabling the tail sleeve 200 and the outer shell 100 to maintain a relatively stable positional relationship during the push-pull process. This reduces loosening or jamming caused by external forces or improper operation, and improves the stability and reliability of the connection between the tail sleeve 200 and the outer shell 100.

[0054] Optionally, the first protruding structure 101 and the second protruding structure 201 can move relative to each other. Specifically, when the first protruding structure 101 and the second protruding structure 201 are closest together, pulling the tail sleeve 200 can move the outer shell 100 and the insert 300 along the axial direction of the push-pull device. When the first protruding structure 101 and the second protruding structure 201 are farthest apart, pushing the tail sleeve 200 can move the outer shell 100 and the insert 300 along the axial direction of the push-pull device.

[0055] In this embodiment, a damping layer may be provided on the contact surface between the tail sleeve 200 and the outer shell 100, and / or on the contact surface between the outer shell 100 and the tail sleeve 200, to increase the resistance when the tail sleeve 200 and the outer shell 100 move relative to each other. Therefore, it is not necessary for the distance between the first protrusion structure 101 and the second protrusion structure 201 to reach its maximum or minimum value; only when the distance between the first protrusion structure 101 and the second protrusion structure 201 changes, the tail sleeve 200 can be pushed or pulled to move the outer shell 100 and the insert 300 along the axial direction of the push-pull device. This prevents the tail sleeve 200 from becoming loose due to frequent insertion and removal.

[0056] Thus, when the first protruding structure 101 and the second protruding structure 201 are closest to each other, they are in contact. The tail sleeve 200 is pulled, and the pulling force is effectively transmitted to the outer shell 100 and the ferrule 300, causing them to move axially along the push-pull device, thereby unlocking the fiber optic connector. Correspondingly, when the first protruding structure 101 and the second protruding structure 201 are furthest apart, they separate, and the second protruding structure 201 contacts the side of the outer shell 100 furthest from the first protruding structure 101. Pushing the tail sleeve 200 at this time causes the outer shell 100 and the ferrule 300 to move in the opposite direction axially along the push-pull device, thereby unlocking the fiber optic connector.

[0057] Optionally, the cross-limiting structure further includes a first opening 102 and a second opening 202. The first opening 102 is disposed on the side wall of the outer casing 100, and a first protrusion structure 101 is disposed on the side of the first opening 102 near the tail sleeve 200. The second opening 202 is disposed on the side wall of the tail sleeve 200, and a second protrusion structure 201 is disposed on the side of the second opening 202 near the outer casing 100. When the outer casing 100 and the tail sleeve 200 are connected, the first protrusion structure 101 and the second protrusion structure 201 are located in the second opening 202 and the first opening 102, respectively. When the tail sleeve 200 is pushed or pulled, the first protrusion structure 101 and the second protrusion structure 201 can slide within the second opening 202 and the first opening 102, respectively.

[0058] In this embodiment, push-pull can be achieved solely through the cooperation of the first protruding structure 101 and the second opening 202, or solely through the cooperation of the second protruding structure 201 and the first opening 102. When pushing or pulling the tail sleeve 200, the first protruding structure 101 can slide within the second opening 202, or the second protruding structure 201 can slide within the first opening 102, thereby achieving axial movement of the outer shell 100 and the insert 300. Thus, when push-pull is achieved solely through the cooperation of the first protruding structure 101 and the second opening 202, the second protruding structure 201 on the outer wall of the tail sleeve 200 can enhance the local material strength. Furthermore, when the first protruding structure 101 fails, such as due to fatigue or stress-induced fracture, push-pull can be achieved through the cooperation of the second protruding structure 202 and the first opening 102, thereby enhancing the reliability of the push-pull device.

[0059] In this embodiment, the lengths of the first opening 102 and the second opening 202 are substantially the same along the axial direction of the push-pull device. The shapes of the first opening 102 and the second opening 202 can be trapezoidal or rectangular guide grooves extending along the axial direction of the push-pull device. A first protrusion structure 101 is provided on one side edge of the first opening 102 near the tail sleeve 200. The first protrusion structure 101 is trapezoidal or wedge-shaped, and its inclined surface is inclined in a direction away from the tail sleeve 200 to form a sliding contact surface. A second protrusion structure 201 is provided on one side edge of the second opening 202 near the outer shell 100. The shape of the second protrusion structure matches the first protrusion structure 101 of the outer shell 100. The inclination direction of the inclined surface can be symmetrical with the first protrusion structure 101 or asymmetrical, as long as the projections of the first protrusion structure 101 and the second protrusion structure 201 in the vertical direction of the axial direction of the push-pull device at least partially overlap. To make the connection more stable, the fourth projected area of ​​the overlapping portion of the first protrusion structure 101 and the second protrusion structure 201 in the vertical direction of the axial direction of the push-pull device shall not be less than half of the fifth projected area of ​​the first protrusion structure 101 in the vertical direction of the axial direction of the push-pull device, and / or not less than half of the sixth projected area of ​​the second protrusion structure 201 in the vertical direction of the axial direction of the push-pull device.

[0060] In other embodiments, when plugging or unplugging the fiber optic connector, the tail sleeve 200 is likely to be pulled towards the chest, meaning it is likely to deflect inwards towards the arm. If a left-handed or right-handed person frequently pulls the tail sleeve 200, the left or right side of the connection structure between the outer shell 100 and the tail sleeve 200 is prone to structural fatigue under the pulling force. To accommodate the fatigue prevention requirements of the internal structure of the outer shell 100 or the habitual deflection direction of the tail sleeve 200, the lengths of the first protrusion structure 101 and the second protrusion structure 201 in the axial direction of the push-pull device can be set to different lengths. For example, the length of the first opening 102 in the axial direction of the push-pull device is greater than the length of the second opening 202 in the axial direction of the push-pull device; correspondingly, the length of the first protrusion structure 101 in the axial direction of the push-pull device is greater than the length of the second protrusion structure 201 in the axial direction of the push-pull device. For example, when the length of the first protrusion structure 101 in the axial direction of the push-pull device is less than the length of the second protrusion structure 201 in the axial direction of the push-pull device, the length of the first protrusion structure 101 in the axial direction of the push-pull device is correspondingly less than the length of the second protrusion structure 201 in the axial direction of the push-pull device.

[0061] In this way, by providing a first opening 102 on the side wall of the outer casing 100 and a second opening 202 on the side wall of the tail sleeve 200, and positioning the first protruding structure 101 and the second protruding structure 201 within the second opening 202 and the first opening 102 respectively, the guiding sliding of the protruding structures during the push-pull process is achieved. When the outer casing 100 is connected to the tail sleeve 200, the first protruding structure 101 and the second protruding structure 201 are embedded in each other's openings, forming a nested fit, so that when the tail sleeve 200 is pushed or pulled, the two slide relative to each other along the axial path of the opening. On the one hand, the radial movement of the protruding structures is constrained by the side wall of the opening, preventing the tail sleeve 200 and the outer casing 100 from misalignment or jamming due to radial offset; on the other hand, the axial extension range of the opening limits the sliding stroke of the protruding structures, ensuring the axial linear transmission of the push-pull action and avoiding uneven force or local stress concentration caused by an unclear sliding path. In addition, the combination of the opening and the protruding structure further disperses the pushing and pulling force on the basis of bidirectional limiting, making the transmission between the outer shell 100 and the tail sleeve 200 more stable, thereby reducing loosening or operating resistance caused by structural deformation or displacement, and improving the reliability and smoothness of operation of the push-pull device.

[0062] Optionally, the tail sleeve 200 and the housing 100 are connected by at least two cross-limiting structures.

[0063] In this embodiment, the tail sleeve 200 and the outer casing 100 are connected by two cross-limiting structures. In other embodiments, three, four, or more cross-limiting structures may be provided to meet design requirements. Of course, for structural stability, the number of cross-limiting structures is preferably set to an even number.

[0064] Thus, since each cross-limiting structure includes a projection overlap between the first protrusion 101 on the sidewall of the outer shell 100 and the second protrusion 201 on the sidewall of the tail sleeve 200, the synchronous action of multiple cross-limiting structures can disperse stress concentrated at a single location during the push-pull process, reducing the risk of local deformation or displacement. Simultaneously, the multiple limiting structures form complementary constraints in the radial and axial directions, further enhancing the relative positional stability between the outer shell 100 and the tail sleeve 200, avoiding tilting or deflection caused by uneven force at a single point. Furthermore, the distributed design of multiple cross-limiting structures can balance the transmission efficiency in the push-pull direction, ensuring the synchronicity and linearity of the outer shell 100 and the insert 300 when moving axially along the push-pull device.

[0065] Optionally, at least two cross-limiting structures are asymmetrically distributed in the vertical direction about the axis of the push-pull device.

[0066] In this embodiment, in the asymmetrical vertical distribution of the push-pull device with respect to its axial direction, at least two intersecting limiting structures can be diagonally distributed about the axial cross section of the push-pull device. The diagonal layout maximizes the distance of the force-bearing point from the axial center, significantly increasing the anti-torsional lever arm. Lateral forces during insertion and removal are synchronously offset by the diagonal limiting structures, avoiding stress concentration on one side. In other embodiments, the diagonally distributed intersecting limiting structures, such as the first protrusion 101 of the housing 100 and the second opening of the tail sleeve 200, can form non-complementary geometric features. For example, the left first protrusion 101 at a 30° tilt angle and the right first protrusion 101 at a 45° misalignment can completely eliminate the possibility of mis-installation during reverse assembly due to angle / height mismatch. Furthermore, the diagonal asymmetry can reduce the lateral dimension and allow the diagonal limiting structure and the elastic deformation of the U-shaped groove 204 of the tail sleeve 200 to form a synergistic guide, reducing insertion and removal forces and path straightness errors, ensuring precise docking.

[0067] In this embodiment, the vertical direction of the push-pull device's axis can refer to a direction perpendicular to the ground, in which case the asymmetrical distribution means that the intersecting limiting structures are not on the same horizontal plane. It can also refer to other directions perpendicular to the push-pull device's axis, such as a direction parallel to the ground, in which case the asymmetrical distribution means that the intersecting limiting structures are not in the same plane perpendicular to the ground; or, a direction tilted at a 45° angle from a direction perpendicular to the ground to any direction perpendicular to the push-pull device's axis.

[0068] In this way, the asymmetrically arranged protruding structure can form staggered constraint forces in the radial and axial directions, effectively suppressing the tilting or torsion of the outer shell 100 and tail sleeve 200 caused by unilateral force. Furthermore, the asymmetrical distribution allows the pushing and pulling forces to be distributed in different directions, avoiding stress concentration or localized wear caused by symmetrical structures, and can reduce the risk of jamming or loosening caused by structural imbalance to a certain extent. Therefore, the asymmetrically distributed cross-limiting structure can apply complementary directional limiting effects to the outer shell 100 and tail sleeve 200 during the pushing and pulling process. By asymmetrically distributing at least two cross-limiting structures in the vertical direction about the axis of the pushing and pulling device, multi-dimensional differentiated constraints and force optimization are achieved.

[0069] Optionally, at least two cross-limiting structures are respectively disposed on two opposite side walls.

[0070] In this embodiment of the disclosure, at least two intersecting limiting structures can be disposed on opposite left and right side walls, or on opposite upper and lower wall surfaces.

[0071] In this embodiment, the two opposing sidewalls can be directly opposite or diagonally opposite. An angle exists between the diagonally opposite sidewalls, and their relative directions are diagonal. Both the outer casing 100 and the tail sleeve 200 can be provided with diagonally opposite sidewalls, such as tilting the two directly opposite sidewalls at a first angle or a second angle in the same or opposite directions. At least two intersecting limiting structures can be respectively provided on the two diagonally opposite sidewalls. By providing at least two intersecting limiting structures on the two diagonally opposite sidewalls, utilizing the asymmetrical characteristics of the diagonal distribution, when the tail sleeve is pushed or pulled, the diagonally opposite intersecting limiting structures can further form staggered and asymmetrical constraint forces in the radial and axial directions, thereby better counteracting the torque generated by unilateral force.

[0072] In this way, since the cross-limiting structures on the opposite sidewalls act synchronously on both sides of the outer shell 100 and the tail sleeve 200 during the pushing and pulling process, the overlapping projections of the first protrusion structure 101 and the second protrusion structure 201 can form a bidirectional symmetrical limit. Therefore, the limiting structures on both sides jointly restrict the radial and axial displacement of the outer shell 100 and the tail sleeve 200, which can avoid the skewing or shaking caused by insufficient constraint on one side. Furthermore, the relatively distributed limiting structures make the pushing and pulling force evenly distributed in the sliding path of the openings on both sides, which can also reduce the risk of deformation or wear of the protruding structure on one side due to concentrated force. By setting at least two cross-limiting structures on the opposite two sidewalls of the outer shell 100 or the tail sleeve 200 respectively, symmetrical force and balanced constraint are achieved, which can counteract the torque or non-axial component force that may be generated during the pushing and pulling process, and ensure that the axial movement of the outer shell 100 and the insert 300 is more linear and synchronous.

[0073] Optionally, the first protrusion structure 101 of at least two intersecting limiting structures has a different tilt angle; and / or, the second protrusion structure 201 of at least two intersecting limiting structures has a different tilt angle.

[0074] In this embodiment of the disclosure, for different cross-limiting structures on the same tail sleeve 200 or outer shell 100, the slope inclination angles of the first protrusion structure 101 and / or the second protrusion structure 201 are set to asymmetrical values. For example, on different side walls of the outer shell 100, two sets of first protrusion structures 101 are provided, with slope inclination angles of α and β (e.g., α=30°, β=45°), and the slopes are all inclined toward the rear end of the outer shell 100 (away from the tail sleeve 200). Alternatively, on the corresponding side wall of the tail sleeve 200, two sets of second protrusion structures 201 are provided, with slope inclination angles of γ and δ (e.g., γ=25°, δ=50°), and the slopes are all inclined toward the front end of the tail sleeve 200 (away from the outer shell 100).

[0075] In other embodiments, the push-pull direction can also be optimized. For example, the slope angle refers to the angle between the side of the protruding structure closest to the sidewall and the sidewall. The slope angle of the first protruding structure 101 corresponding to the pulling direction is smaller (e.g., 25°) to reduce sliding resistance. The smaller the slope angle, the higher the proportion of axial force and the lower the sliding resistance, which is suitable for frequent unlocking needs in high-density scenarios. The slope angle of the second protruding structure 201 corresponding to the pushing direction is larger (e.g., 50°) to enhance axial force transmission efficiency. The larger the slope angle, the higher the normal pressure of the contact surface and the higher the axial force transmission efficiency, ensuring a stable connection of the ferrule 300.

[0076] Thus, because the protruding structures of different cross-limiting structures have different tilt angles, during the assembly of the tail sleeve 200 and the outer shell 100, correct alignment and projection overlap can only be achieved when the tilt angle of the protruding structure perfectly matches the tilt direction of the corresponding opening. Therefore, the difference in tilt angle can form a physical guiding constraint, forcing the tail sleeve 200 and the outer shell 100 to connect only along a preset direction, avoiding misalignment caused by angular deviation. Furthermore, the protruding structures with different tilt angles generate a self-correcting effect through complementary inclined surface contact during assembly, automatically adjusting the relative position of the tail sleeve 200 and the outer shell 100, eliminating non-axial offset caused by external forces or operational errors. By making the tilt angles of the first protruding structure 101 and / or the second protruding structure 201 of at least two cross-limiting structures different, the self-calibration and anti-misalignment function of the connection direction is achieved. Through the directional constraint of the geometric shape, it is ensured that the cross-limiting structure can only be fully fitted when correctly aligned, thereby effectively preventing incorrect connection between the tail sleeve 200 and the outer shell 100, improving assembly accuracy and structural reliability.

[0077] Optionally, at least two cross-limiting structures have different axial position offsets in their first openings 102; and / or, at least two cross-limiting structures have different axial position offsets in their second openings 202.

[0078] In this embodiment, two sets of first openings 102 are provided on multiple sidewalls of the housing 100, staggered at a certain distance from the starting position of the push-pull device in the axial direction. For example, the first set of openings is close to the front end of the housing 100, and the second set of openings is offset backward by a set distance, forming a phased contact path. And / or, two sets of second openings 202 are provided on the corresponding sidewalls of the tail sleeve 200, whose axial positions are complementary to the first openings 102 of the housing 100, ensuring that the protruding structures are sequentially engaged at different axial positions during push-pull. The offset of each set of first openings 102 and the offset of the corresponding second opening 202 form a phase difference, so as to achieve phased force distribution of the push-pull action through staggered layout. In other embodiments, openings with smaller offsets may be provided to preferentially contact the corresponding protrusions, so as to guide the axial movement of the tail sleeve 200 using an initial low-resistance path. During this stage, the contact surface pressure is small, avoiding instantaneous impact force at startup and reducing the risk of operational jamming. The opening with a larger offset contacts the protrusion in the subsequent stage, and the force transmission efficiency is enhanced through a longer sliding path. During this stage, the pressure on the contact surface gradually increases, ensuring that the ferrule 300 is stably locked, while also dispersing the wear of the long-term stress area.

[0079] In this way, due to the positional differences of the openings of the different cross-limiting structures along the axial direction of the push-pull device, each protruding structure contacts the opening sequentially at different axial positions during the push-pull process. The axial offset of the openings disperses the push-pull force to different contact points, which can further avoid local wear or deformation caused by concentrated force at a single point and reduce the risk of jamming. Furthermore, the difference in the axial positional offset of the openings can also form a physical guiding constraint during assembly. Only when the tail sleeve 200 and the outer shell 100 are aligned at a preset angle and position can each protruding structure simultaneously engage with the corresponding opening, preventing incorrect connection due to misalignment of the opening positions.

[0080] Optionally, the tail sleeve 200 includes a push-pull handle 203. The push-pull handle 203 is disposed at the end of the tail sleeve 200 away from the housing 100. The side of the push-pull handle 203 near the end has one-way or multi-way elasticity.

[0081] In this embodiment of the present disclosure, a plurality of U-shaped grooves 204 are provided on the side of the push-pull handle 203 near the end, which are staggered along the axial and / or circumferential directions of the push-pull device, thereby providing the side of the push-pull handle 203 near the end with axial and / or circumferential and / or radial elasticity of the push-pull device.

[0082] In this way, during the push-pull process, the elastic deformation can absorb the instantaneous impact force or non-axial load applied during operation, reducing excessive bending or stretching of the optical fiber caused by sudden changes in external force, thereby avoiding signal attenuation or physical damage to the optical fiber due to excessively small bending radius or uneven force. Furthermore, by dispersing the direct force on the internal cable of the optical fiber connector during the push-pull action through flexible deformation, it prevents the rapid displacement of the outer shell 100 and ferrule 300 under rigid transmission from pulling or twisting the optical fiber, reducing the risk of stress concentration at the connection between the optical fiber and ferrule 300. In addition, the self-resetting characteristic of the elastic structure causes the handle to return to its initial state after the push-pull action, ensuring stable alignment between the tail sleeve 200 and the outer shell 100, and preventing the optical fiber from being in an unnatural bending state for a long time due to residual deformation. By setting the push-pull handle 203 at the end of the tail sleeve 200 away from the outer shell 100, and configuring unidirectional or multidirectional elasticity on the side near the end, a dual effect of protecting the optical fiber from bending and buffering the operating force is achieved. This not only improves the smoothness of fiber optic connector operation in high-density plugging and unplugging scenarios, but also enhances the physical protection of optical fibers, ensuring the stability of optical signal transmission and the reliability of equipment for long-term use.

[0083] Combination Figure 1-10 As shown, this disclosure also discloses an optical fiber connector, including the aforementioned push-pull device for an optical fiber connector, an inner shell 400 with a through-cavity, a shell return spring 103 disposed in the gap between the inner shell 400 and the outer shell 100 for elastically pushing the outer shell 100 towards the front end of the inner shell 400, a sheath pressure ring 206, an aramid pressure ring 205, an inner spring 402, an inner spring push seat 403, a guide pin 301, a guide pin fixing seat 302, and a dust cap 500. The outer wall of the inner shell 400 is also provided with a snap-fit ​​groove 401 for engaging with a corresponding hook of the adapter, and the outer shell 100 covers the snap-fit ​​groove 401 under the elastic force of the shell return spring 103.

[0084] Thus, when the operator needs to unlock the adapter and fiber optic connector, by applying force to the push-pull handle 203 at one end of the tail sleeve 200, and with the cooperation of the aforementioned push-pull device for the fiber optic connector, the outer shell 100 can move along the axial direction of the push-pull device toward the tail end of the inner shell 400. This allows the tail sleeve 200 to drive the outer shell 100 to overcome the elastic force of the outer shell return spring 103 and move away from the outside of the latching slot 401. This allows the adapter to disengage from the latching slot 401 on the inner shell 400. The operator can then unlock the fiber optic connector by applying force to the push-pull handle 203, which is convenient. After releasing the force, the outer shell return spring 103 returns to its elastic state and pushes the outer shell 100 to cover the latching slot 401 again.

[0085] Optionally, the inner spring push seat 403 includes a stop 404 whose front end is inserted into the rear end of the inner cavity of the inner shell 400. The rear end of the tail sleeve 200 protrudes towards the interior of the tail sleeve 200 to form a limiting step 405. When the tail sleeve 200 moves towards the front end of the inner shell 400 with the outer shell 100 under the elastic force of the outer shell return spring 103, the limiting step 405 abuts against the rear end surface of the stop 404 to limit its movement. Furthermore, by providing a limiting step 405 at the rear end of the tail sleeve 200, when the tail sleeve 200 moves towards the front end of the inner shell 400 with the outer shell 100 under the elastic force of the outer shell return spring 103, the limiting step 405 abuts against the rear end surface of the stop 404 to achieve limiting. The operator can also further apply force to the push-pull handle 203 to insert the front end of the fiber optic connector into the adapter, thereby locking it with the adapter, making operation convenient. The rear end of the inner spring push seat 403 is provided with a threaded aramid pressure ring 205, and a protective pressure ring 206 is provided between the outer surface of the rear end of the aramid pressure ring 205 and the inner surface of the tail sleeve 200.

[0086] Optionally, the outer wall of the inner shell 400 is provided with a slot 406, and the inner wall of the outer shell 100 is provided with a barb 104 correspondingly accommodated in the slot 406. Under the action of the outer shell return spring 103, the barb 104 abuts against the inner wall of the slot 406 on the side of the inner shell 400 near the front end. The rear edge of the inner shell 400 is provided with a limiting flange 407, and the inner wall of the rear end of the outer shell 100 is provided with a stop block 408 for cooperating with the limiting flange 407 to limit the rearward extreme position of the outer shell 100 towards the rear end of the inner shell 400 and excessively compress the outer shell return spring 103. Through the cooperation of the barb 104 and the slot 406, the outer shell 100 can be effectively prevented from dislodging from the front end of the inner shell 400. Through the cooperation of the limiting flange 407 and the stop block 408, the outer shell 100 can be effectively prevented from dislodging from the rear end of the inner shell 400 and the maximum travel of the outer shell 100 towards the rear end of the inner shell 400 can be limited.

[0087] Optionally, the inner shell 400 has a rear receiving groove 409 at the tail ends of its two opposite outer walls, which extends to the limiting flange 407. The outer shell 100 has a front receiving groove 411 on its two opposite inner walls. The front receiving groove 411 and the rear receiving groove 409 are connected to form a spring groove for accommodating the outer shell return spring 103. The deformation of the outer shell return spring 103 is controlled by the groove wall as the outer shell 100 moves towards the rear end of the inner shell 400, causing the outer shell return spring 103 to compress and elongate along a preset compression direction, which also effectively positions the outer shell return spring 103.

[0088] Optionally, the fiber optic connector also includes a plug assembly assembled within the front end of the inner cavity of the inner housing 400 and extending from the front opening of the inner cavity, and an inner spring 402 disposed between the plug assembly and the inner spring push seat 403. The inner spring 402 elastically pushes against the plug assembly, allowing the plug assembly to fully mate with the inside of the adapter socket. At the same time, when the plug assembly is subjected to rigid force during the plugging process, the inner spring 402 can buffer the rigid force on the plug assembly and prevent damage to the plug assembly.

[0089] Optionally, the connector assembly includes the aforementioned ferrule 300, guide pin 301, guide pin fixing seat 302, and cable tray 310. The ferrule 300 is movably disposed within the inner cavity of the inner shell 400 and can extend outwards and retract into the front portion of the inner shell 400. The ferrule 300 has a multi-core fiber optic jack 303 at its front and a socket communicating with the multi-core fiber optic jack 303 at its rear. A limiting protrusion on its outer side engages with a limiting protrusion located on the front end of the inner wall of the inner shell 400. The ferrule 300 includes a multi-core fiber optic base, with the multi-core fiber optic jack 303 located at its front. The rear portion of the multi-core fiber optic base has an internal socket communicating with the multi-core fiber optic jack 303. Guide holes 308 are provided on both sides of the multi-core fiber optic base. The multi-core fiber optic connector has an injection opening 309 that communicates with the jack. After the cable tube 310, along with the multi-core fiber optic cable, is inserted, fixing glue can be injected into the injection opening 309 to fix the cable tube 310 to the multi-core fiber optic connector. One end of the inner spring 402 abuts against the stop 404 of the inner spring push seat 403, and the other end abuts against the tail end face of the ferrule 300, simultaneously fitting the portion of the cable tube 310 that protrudes from the tail end face of the ferrule 300.

[0090] Optionally, the guiding assembly is configured at the tail end of the multi-core fiber optic connector, having a guide pin 301 for inserting into the guide through-hole 308 and a guide pin retainer 302 for fixing the guide pin 301. The guide pin retainer 302 has a through slot in the middle corresponding to the insertion port;

[0091] Optionally, the guide assembly is made of metal, the guide pin 301 is a PIN pin, and the guide pin 301 extends out of the front end face of the multi-core fiber optic connector. The tail end of the guide pin fixing seat 302 is provided with an inner spring 402 receiving groove 311, so that the front end of the inner spring 402 is located in the inner spring 402 receiving groove 311, ensuring that the inner spring 402 will not deviate or move laterally and damage the optical fiber.

[0092] Optionally, the front end of the inner spring push seat 403 is provided with an outwardly extending buckle, which engages with the connecting groove 410 provided at the front end of the inner shell 400. The connecting groove 410 communicates with the receiving groove where the outer shell return spring 103 is located. The rear end of the inner spring push seat 403 is provided with a stop portion 412 for blocking the end face of the inner shell 400. On the opposite side walls of the stop member 404, positioning protrusions 413 are respectively provided, extending a predetermined length from the middle of the front end face of the stop portion 412 along the axial direction of the push-pull device towards the front end of the stop member 404. The inner cavity is provided with a positioning groove 414 that matches the shape of the positioning protrusion 413 at the position corresponding to the positioning protrusion 413. By providing the stop portion 412, the length of the stop member 404 inserted into the inner shell 400 can be effectively limited. Furthermore, through the mutual cooperation of the positioning protrusion 413 and the positioning groove 414, the connection strength between the stop member 404 and the inner shell 400 can be effectively enhanced, and the resistance to direct pull and lateral pull is strong.

[0093] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A push-pull device for a fiber optic connector, comprising: include: The outer casing is connected to the ferrule drive. The tail sleeve is connected to the outer shell by at least two cross-limiting structures, which are asymmetrically distributed in the vertical direction about the axis of the push-pull device; When the tail sleeve is pushed or pulled, the outer shell and the insert can move along the axial direction of the push-pull device; The asymmetrical distribution of the vertical direction of the push-pull device includes: at least two intersecting limiting structures with diagonal distribution of the cross sections of the push-pull device along its axial direction, and the force point being at its maximum distance from the axial center of the push-pull device.

2. The apparatus of claim 1, wherein, The cross-limiting structure includes: The first protruding structure is provided on the side wall of the outer casing; The second protruding structure is located on the side wall of the tail sleeve; The projections of the first protrusion structure and the second protrusion structure on the axial direction of the push-pull device at least partially overlap.

3. The apparatus according to claim 2, characterized in that, At least two intersecting limiting structures have different inclination angles for their first protrusions; and / or, At least two cross-limiting structures have different tilt angles for their second protrusions.

4. The apparatus according to claim 2, characterized in that, The first protruding structure and the second protruding structure can move relative to each other; When the first protruding structure and the second protruding structure are closest to each other, pulling the tail sleeve can drive the outer shell and the insert to move along the axial direction of the push-pull device. When the first protruding structure and the second protruding structure are farthest apart, pushing the tail sleeve can drive the outer shell and the insert to move along the axial direction of the push-pull device.

5. The apparatus according to claim 2, characterized in that, The cross-limiting structure also includes: The first opening is located on the side wall of the outer casing, and the first protruding structure is located on the side of the first opening near the tail sleeve. The second opening is located on the side wall of the tail sleeve, and the second protruding structure is located on the side of the second opening near the outer shell. When the outer shell and the tail sleeve are connected, the first protruding structure and the second protruding structure are located in the second opening and the first opening, respectively. When the tail sleeve is pushed and pulled, the first protruding structure and the second protruding structure can slide in the second opening and the first opening, respectively.

6. The apparatus according to claim 5, characterized in that, At least two of the intersecting limiting structures have different axial position offsets in their first openings; and / or, At least two of the cross-limiting structures have different axial position offsets for their second openings.

7. The apparatus according to claim 1, characterized in that, At least two intersecting limiting structures are respectively set on two diagonally opposite side walls.

8. The apparatus according to any one of claims 1 to 7, characterized in that, Tail cover includes: A push-pull handle is located at the end of the tail sleeve, on the side furthest from the outer casing; The push-pull handle has one-way or multi-way elasticity on the side near the end.

9. An optical fiber connector, characterized in that, Includes a push-pull device for an optical fiber connector as described in any one of claims 1 to 8.

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