Push-pull device for optical fiber connector and optical fiber connector

Abstract

The invention relates to the technical field of optical fiber connectors, and discloses a push-pull device for an optical fiber connector, and the device comprises a housing which is in transmission connection with an insertion core; the tail sleeve is connected with the shell through at least two crossed limiting structures, and the at least two crossed limiting structures are asymmetrically distributed in the direction perpendicular to the axial direction of the push-pull device; when the tail sleeve is pushed and pulled, the shell and the insertion core can move in the axial direction of the push-pull device. The asymmetrically-arranged cross limiting structures can form restraining force distributed in a staggered mode in the radial direction and the axial direction, and the inclination or torsion phenomenon caused by single-side stress of the outer shell and the tail sleeve is effectively restrained. Moreover, due to asymmetric distribution, push-pull force can be dispersed and transmitted in different directions, stress concentration or local abrasion caused by a symmetric structure is avoided, the loosening or clamping stagnation phenomenon caused by external force or improper operation is reduced, and the stability and reliability of connection between the tail sleeve and the shell are improved. The invention further discloses an optical fiber connector.

Description

Technical Field

[0001] This application relates to the technical field of fiber optic connectors, for example, to a push-pull device for a fiber optic connector and a fiber optic connector. Background Art

[0002] Currently, with the rapid development of 5G communication, artificial intelligence, Internet of Things, and big data technologies, the demand for fiber optic network bandwidth and port density by hyperscale data centers and cloud service providers has increased exponentially. In this context, MPO (Multi-Fiber Push-On) connectors, with their high-density integration characteristics, have become the mainstream solution for optimizing wiring space and increasing port density. However, as the density of optical distribution frames continues to climb, the connector spacing has been compressed to the millimeter level, resulting in difficult insertion and extraction of MPO connectors. On high-density distribution frames, due to limited space, currently, the MPO connectors are usually directly inserted and extracted by hand or with the help of specific tools deep into the middle frame of the MPO connector. However, directly inserting and extracting MPO connectors by hand or with the help of specific tools not only increases the operation difficulty and procedures but may also cause extrusion, affecting the normal use of other fiber optic connectors.

[0003] Related technologies have disclosed MPO connectors unlocked by a ferrule. The MPO connector includes a housing assembly and a ferrule. The housing assembly includes an inner housing and an outer housing. The inner housing is provided with ferrules and springs. A spring limit seat is fixed on the inner housing. A cable crimping section is provided at the rear end of the spring limit seat. The ferrule is sleeved on the cable crimping section, and the front end of the ferrule is connected to the outer housing to pull the outer housing backward.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related technologies: Adopting related technologies has reduced to a certain extent the impact on other fiber optic connectors when inserting and extracting MPO connectors on high-density distribution frames. However, in actual applications, an undercut is usually provided on the outer shell. Frequent pushing and pulling of the ferrule for insertion and extraction may cause the force between the ferrule and the outer shell to concentrate on the undercut part. When a pushing or pulling force is applied, the undercut may be deformed or displaced due to uneven force, resulting in the connection structure between the ferrule and the outer shell being prone to jamming or loosening during the pushing and pulling process, making the axial movement of the outer shell and the ferrule not smooth enough. The angle of the ferrule needs to be repeatedly adjusted during pushing and pulling to achieve effective transmission, increasing the operation complexity.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention To gain a basic understanding of some aspects of the disclosed embodiments, a simple summary is provided below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the scope of protection of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0006] Embodiments of the present disclosure provide a push-pull device for an optical fiber connector and an optical fiber connector, so as to improve the connection stability and reliability between the ferrule and the housing during the process of inserting and removing an MPO connector on a high-density distribution frame, and solve the problems of loosening or jamming caused by unstable connection between the ferrule and the housing.

[0007] In some embodiments, the push-pull device for an optical fiber connector includes: a housing, which is in driving connection with the ferrule; a ferrule, which is connected to the housing through at least two cross-limiting structures, and the at least two cross-limiting structures are asymmetrically distributed with respect to the vertical direction of the axis of the push-pull device; wherein, when the ferrule is pushed or pulled, the housing and the ferrule can be moved along the axis of the push-pull device.

[0008] Optionally, the cross-limiting structure includes: a first protrusion structure, which is arranged on the side wall of the housing; a second protrusion structure, which is arranged on the side wall of the ferrule; wherein, the projections of the first protrusion structure and the second protrusion structure on the axis of the push-pull device at least partially overlap.

[0009] Optionally, the inclination angles of the first protrusion structures of at least two cross-limiting structures are different; and / or, the inclination angles of the second protrusion structures of at least two cross-limiting structures are different.

[0010] Optionally, the first protrusion structure and the second protrusion structure can move relative to each other; wherein, when the first protrusion structure and the second protrusion structure are closest to each other, pulling the ferrule can drive the housing and the ferrule to move along the axis of the push-pull device, and when the first protrusion structure and the second protrusion structure are farthest from each other, pushing the ferrule can drive the housing and the ferrule to move along the axis of the push-pull device.

[0011] Optionally, the cross-limiting structure further includes: a first opening, which is arranged on the side wall of the housing, and the first protrusion structure is arranged on the side of the first opening close to the ferrule; a second opening, which is arranged on the side wall of the ferrule, and the second protrusion structure is arranged on the side of the second opening close to the housing; wherein, when the housing and the ferrule are connected, the first protrusion structure and the second protrusion structure are respectively located in the second opening and the first opening, and when the ferrule is pushed or pulled, the first protrusion structure and the second protrusion structure can slide in the second opening and the first opening respectively.

[0012] Optionally, the axial position offsets of the first openings of at least two cross-limiting structures are different; and / or, the axial position offsets of the second openings of at least two cross-limiting structures are different.

[0013] Optionally, at least two cross limiting structures are diagonally distributed with respect to the axial section of the push-pull device.

[0014] Optionally, at least two cross limiting structures are respectively arranged on two obliquely opposite side walls.

[0015] Optionally, the tail sleeve includes: a push-pull handle arranged at the end of the tail sleeve away from the outer shell; wherein, one side of the push-pull handle close to the end has unidirectional or multi-directional elasticity.

[0016] In some embodiments, the fiber optic connector includes: the push-pull device for the fiber optic connector described above.

[0017] The push-pull device for the fiber optic connector and the fiber optic connector provided by the embodiments of the present disclosure can achieve the following technical effects: The push-pull device for the fiber optic connector includes an outer shell and a tail sleeve. The outer shell is in driving connection with the ferrule. The tail sleeve is connected to the outer shell through at least two cross limiting structures, and the at least two cross limiting structures are asymmetrically distributed with respect to the vertical direction of the axis of the push-pull device. When the tail sleeve is pushed or pulled, the outer shell and the ferrule can move along the axis of the push-pull device. The asymmetrically arranged cross limiting structures can form intersecting constraints in the radial and axial directions, effectively suppressing the tilting or twisting phenomenon of the outer shell and the tail sleeve caused by unilateral force. Moreover, the asymmetric distribution can disperse the pushing and pulling forces in different directions, avoiding stress concentration or local wear caused by a symmetric structure, reducing the loosening or jamming phenomenon caused by external force or improper operation, and improving the stability and reliability of the connection between the tail sleeve and the outer shell.

[0018] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. Description of the Drawings

[0019] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them: Figure 1 is an exploded schematic view of the fiber optic connector provided by the embodiment of the present disclosure; Figure 2 is a vertical sectional view of the fiber optic connector provided by the embodiment of the present disclosure cut along the axis; Figure 3 is a horizontal sectional view of the fiber optic connector provided by the embodiment of the present disclosure cut along the axis; Figure 4 is a structural schematic view of the tail sleeve of a fiber optic connector provided by the embodiment of the present disclosure; Figure 5It is a schematic structural diagram of a housing of an optical fiber connector provided by an embodiment of the present disclosure; Figure 6 It is a schematic structural diagram of another perspective of a housing of an optical fiber connector provided by an embodiment of the present disclosure; Figure 7 It is a schematic structural diagram of an inner housing of an optical fiber connector provided by an embodiment of the present disclosure; Figure 8 It is a schematic structural diagram of an inner spring pushing seat of an optical fiber connector provided by an embodiment of the present disclosure; Figure 9 It is a schematic structural diagram of a ferrule provided by an embodiment of the present disclosure; Figure 10 It is a schematic structural diagram of an overall structure of an optical fiber connector provided by an embodiment of the present disclosure.

[0020] Reference numerals: 100: housing; 101: first convex structure; 102: first opening; 103: housing return spring; 104: barb; 200: tail sleeve; 201: second convex structure; 202: second opening; 203: push-pull handle; 204: U-shaped groove; 205: aramid compression ring; 206: sheath compression ring; 300: ferrule; 301: guide pin; 302: guide pin fixing seat; 303: multi-core optical fiber jack; 304: socket; 305: limiting boss; 306: limiting protrusion; 307: multi-core optical fiber seat; 308: guiding through hole; 309: glue injection opening; 310: drainage pipe; 311: spring receiving groove; 400: inner housing; 401: snap groove; 402: inner spring; 403: inner spring pushing seat; 404: stopper; 405: limiting step; 406: card slot; 407: limiting flange; 408: stop block; 409: rear receiving groove; 410: connection groove; 411: front receiving groove; 412: stop portion; 413: positioning convex block; 414: positioning groove; 500: dust cap; Detailed implementation manners In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and explanation purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, a sufficient understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0021] In the description, claims and the above drawings of the embodiments of the present disclosure, the terms "first", "second", etc. are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0022] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0023] In addition, the terms "arranged", "connected", "fixed" should be understood in a broad sense. For example, "connected" 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 directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0024] Unless otherwise specified, the term "plurality" means two or more.

[0025] In the embodiments of the present disclosure, the character " / " indicates that the front and rear objects are in an "or" relationship. For example, A / B means: A or B.

[0026] The term "and / or" is an associative relationship describing an object, indicating that there can be three relationships. For example, A and / or B means: A or B, or, A and B these three relationships.

[0027] It should be noted that, without conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0028] In practical applications, a convex structure is usually only provided on the ferrule. Frequent pushing and pulling of the ferrule for insertion and extraction may cause the force between the ferrule and the housing to concentrate on the convex part of the ferrule. When a pushing or pulling force is applied, the convex structure of the ferrule may be deformed or displaced due to uneven force, resulting in the connection structure between the ferrule and the housing being prone to jamming or loosening during the pushing and pulling process, causing the axial movement of the housing and the ferrule to be not smooth enough. Repeated adjustment of the ferrule angle is required during pushing and pulling to achieve effective transmission, increasing the operation complexity.

[0029] Combined with Figures 4 - 6 As shown in FIGS. 9 and 10, an embodiment of the present disclosure provides a pushing and pulling device for an optical fiber connector, including a housing 100 and a ferrule 200. The housing 100 is in driving connection with the ferrule 300. The ferrule 200 is connected to the housing 100 through an intersecting limiting structure. The intersecting limiting structure includes a first convex structure 101 and a second convex structure 201 respectively provided on the side wall of the housing 100 and the side wall of the ferrule 200. At least a part of the projections of the first convex structure 101 and the second convex structure 201 on the axial direction of the pushing and pulling device overlap. Wherein, when the ferrule 200 is pushed and pulled, the housing 100 and the ferrule 300 can be moved along the axial direction of the pushing and pulling device.

[0030] In the embodiment of the present disclosure, as Figure 2 and Figure 3 shown by the dotted line in, the axial direction of the pushing and pulling device refers to the axial direction or the moving direction of the housing 100 or the ferrule 200, or can also be the extending direction of the optical fiber in the optical fiber connector.

[0031] In the embodiment of the present disclosure, the first convex structure 101 and the second convex structure 201 may be the same or different, as long as the first convex structure 101 and the second convex structure 201 form an intersecting limiting structure when the housing 100 and the ferrule 200 are connected.

[0032] In the embodiment of the present disclosure, as Figures 4 - 6 shown, the first convex structure 101 is provided on the inner side of the side wall of the housing 100. Correspondingly, the second convex structure 201 is provided on the outer side of the side wall of the ferrule 200. At this time, at least a part of the ferrule 200 extends into the housing 100 to realize the connection between the ferrule 200 and the housing 100. In some other embodiments, the first convex structure 101 may also be provided on the outer side of the side wall of the housing 100. Correspondingly, the second convex structure 201 is provided on the inner side of the side wall of the ferrule 200. At this time, at least a part of the housing 100 extends into the ferrule 200 to realize the connection between the ferrule 200 and the housing 100.

[0033] In the embodiment of the present disclosure, the projections of the first convex structure 101 and the second convex structure 201 in the axial direction of the outer shell 100 or the tail sleeve 200 may completely overlap or partially overlap. In order to make the connection more stable, the first projected area of the overlapping part of the first convex structure 101 and the second convex structure 201 in the axial direction of the push-pull device is not less than one-half of the second projected area of the first convex structure 101 in the axial direction of the push-pull device, and / or not less than one-half of the third projected area of the second convex structure 201 in the axial direction of the push-pull device.

[0034] By using the push-pull device for an optical fiber connector provided in the embodiment of the present disclosure, the projections of the first convex structure 101 and the second convex structure 201 in the axial direction of the push-pull device at least partially overlap, forming a two-way limit. It not only restricts the radial movement between the tail sleeve 200 and the outer shell 100, but also restricts their axial movement, so that the tail sleeve 200 and the outer shell 100 can maintain a relatively stable positional relationship during the push-pull process, reducing looseness or jamming caused by external forces or improper operations, and improving the stability and reliability of the connection between the tail sleeve 200 and the outer shell 100.

[0035] Optionally, the first convex structure 101 and the second convex structure 201 can move relative to each other. Among them, when the first convex structure 101 and the second convex structure 201 are closest to each other, pulling the tail sleeve 200 can drive the outer shell 100 and the ferrule 300 to move in the axial direction of the push-pull device. When the first convex structure 101 and the second convex structure 201 are farthest from each other, pushing the tail sleeve 200 can drive the outer shell 100 and the ferrule 300 to move in the axial direction of the push-pull device.

[0036] In the embodiment of the present disclosure, a damping layer may also be provided on the contact surface when the tail sleeve 200 is connected to the outer shell 100, and / or on the contact surface when the outer shell 100 is connected to the tail sleeve 200, so as to increase the resistance when the tail sleeve 200 and the outer shell 100 move relative to each other. Thus, it is not necessary for the distance between the first convex structure 101 and the second convex structure 201 to reach the maximum value or the minimum value. When only the distance between the first convex structure 101 and the second convex structure 201 changes, the outer shell 100 and the ferrule 300 can be driven to move in the axial direction of the push-pull device by pushing or pulling the tail sleeve 200. It can prevent the tail sleeve 200 from loosening due to frequent plugging and unplugging.

[0037] In this way, when the first convex structure 101 and the second convex structure 201 are in the state of the closest distance, the first convex structure 101 and the second convex structure 201 are in contact with each other. The tail sleeve 200 is pulled, and the pulling force can be effectively transmitted to the outer shell 100 and the ferrule 300, driving the outer shell 100 and the ferrule 300 to move axially along the push-pull device, so as to unlock the fiber optic connector. Correspondingly, when the first convex structure 101 and the second convex structure 201 are at the farthest distance, the first convex structure 101 and the second convex structure 201 are separated from each other, and the second convex structure 201 contacts the side of the outer shell 100 away from the first convex structure 101. At this time, pushing the tail sleeve 200 can drive the outer shell 100 and the ferrule 300 to move axially in the reverse direction along the push-pull device, so as to realize the unlocking of the fiber optic connector.

[0038] Optionally, the cross-limiting structure further includes a first opening 102 and a second opening 202. The first opening 102 is arranged on the side wall of the outer shell 100, and the first convex structure 101 is arranged on the side close to the tail sleeve 200 of the first opening 102. The second opening 202 is arranged on the side wall of the tail sleeve 200, and the second convex structure 201 is arranged on the side close to the outer shell 100 of the second opening 202. Wherein, when the outer shell 100 and the tail sleeve 200 are connected, the first convex structure 101 and the second convex structure 201 are respectively located in the second opening 202 and the first opening 102. When the tail sleeve 200 is pushed and pulled, the first convex structure 101 and the second convex structure 201 can slide in the second opening 202 and the first opening 102 respectively.

[0039] In the embodiment of the present disclosure, pushing and pulling can also be achieved only by the cooperation of the first convex structure 101 and the second opening 202, or only by the cooperation of the second convex structure 201 and the first opening 102. For example, when the tail sleeve 200 is pushed and pulled, the first convex structure 101 can slide in the second opening 202, or the second convex structure 201 can slide in the first opening 102, so as to realize the axial movement of the outer shell 100 and the ferrule 300. In this way, when pushing and pulling is achieved only by the cooperation of the first convex structure 101 and the second opening 202, the second convex structure 201 arranged on the outer side wall of the tail sleeve 200 can play a role in enhancing the local material strength. And when the first convex structure 101 fails, such as the first convex structure breaks and fails under fatigue or stress, pushing and pulling can be achieved through the cooperation of the second convex structure 202 and the first opening 102 to enhance the reliability of the push-pull device.

[0040] In the embodiments of the present disclosure, the lengths of the first opening 102 and the second opening 202 are substantially the same in the axial direction of the pushing and pulling device. The shapes of the first opening 102 and the second opening 202 may be trapezoidal or rectangular guide grooves extending in the axial direction of the pushing and pulling device. A first convex structure 101 is provided on one side edge of the first opening 102 close to the tail sleeve 200. The first convex 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 convex structure 201 is provided on one side edge of the second opening 202 close to the housing 100. The shape of the second convex structure matches that of the first convex structure 101 of the housing 100. The inclination direction of the inclined surface may be cross-symmetric or asymmetric with that of the first convex structure 101, as long as at least a part of the projections of the first convex structure 101 and the second convex structure 201 in the direction perpendicular to the axial direction of the pushing and pulling device overlap. To make the connection more stable, the fourth projected area of the overlapping part of the first convex structure 101 and the second convex structure 201 in the direction perpendicular to the axial direction of the pushing and pulling device is not less than one-half of the fifth projected area of the first convex structure 101 in the direction perpendicular to the axial direction of the pushing and pulling device, and / or not less than one-half of the sixth projected area of the second convex structure 201 in the direction perpendicular to the axial direction of the pushing and pulling device.

[0041] In some other embodiments, when inserting and removing the fiber optic connector, when pulling the tail sleeve 200, the tail sleeve 200 is most likely to face the person's chest, that is, the tail sleeve 200 is most likely to deflect towards the inner side of the arm. If a left-handed or right-handed person frequently pulls the tail sleeve 200, under the action of the pulling force, the left or right side of the connection structure between the housing 100 and the tail sleeve 200 is extremely prone to structural fatigue. To meet the anti-fatigue requirements in the habitual deflection direction of the internal structure of the housing 100 or the tail sleeve 200, the lengths of the first convex structure 101 and the second convex structure 201 in the axial direction of the pushing and pulling device can be set to different lengths. For example, the length of the first opening 102 in the axial direction of the pushing and pulling device is greater than the length of the second opening 202 in the axial direction of the pushing and pulling device. Correspondingly, the length of the first convex structure 101 in the axial direction of the pushing and pulling device is greater than the length of the second convex structure 201 in the axial direction of the pushing and pulling device. Another example is that when the length of the first convex structure 101 in the axial direction of the pushing and pulling device is less than the length of the second convex structure 201 in the axial direction of the pushing and pulling device, correspondingly, the length of the first opening 102 in the axial direction of the pushing and pulling device is less than the length of the second opening 202 in the axial direction of the pushing and pulling device.

[0042] In this way, by providing a first opening 102 on the side wall of the outer shell 100 and a second opening 202 on the side wall of the tail sleeve 200, and positioning the first convex structure 101 and the second convex structure 201 in the second opening 202 and the first opening 102 respectively, the guiding sliding of the convex structure during the pushing and pulling process is realized. When the outer shell 100 is connected to the tail sleeve 200, the first convex structure 101 and the second convex structure 201 are embedded in the openings of each other, forming a nested fit, so that when the tail sleeve 200 is pushed and pulled, the two slide relative to each other along the axial path of the opening. On the one hand, the side wall of the opening restricts the radial movement of the convex structure, preventing the tail sleeve 200 and the outer shell 100 from being misaligned or jammed due to radial offset; on the other hand, the axial extension range of the opening defines the sliding stroke of the convex structure, ensuring the axial linear transmission of the pushing and pulling action and avoiding uneven force or local stress concentration caused by an unclear sliding path. In addition, the cooperation between the opening and the convex structure further disperses the pushing and pulling forces on the basis of two-way limiting, making the transmission between the outer shell 100 and the tail sleeve 200 more stable, thereby reducing looseness or operating resistance caused by structural deformation or displacement, and improving the reliability and operating smoothness of the pushing and pulling device.

[0043] Optionally, the tail sleeve 200 and the outer shell 100 are connected by at least two cross-limiting structures.

[0044] In the embodiment of the present disclosure, the tail sleeve 200 and the outer shell 100 are connected by two cross-limiting structures. In other embodiments, in order to meet the design requirements, three, four or more cross-limiting structures can also be provided. Of course, for the stability of the structure, the number of cross-limiting structures is preferably set to an even number.

[0045] In this way, since each cross-limiting structure includes the projection coincidence fit of the first convex structure 101 on the side wall of the outer shell 100 and the second convex structure 201 on the side wall of the tail sleeve 200, the synchronous action of multiple cross-limiting structures can disperse the stress concentrated at a single position during the pushing and pulling process, reducing the risk of local deformation or displacement. At the same time, multiple limiting structures form complementary constraints in the radial and axial directions, further enhancing the relative position stability between the outer shell 100 and the tail sleeve 200, and avoiding tilting or deflection caused by uneven force at a single point. In addition, the distribution design of multiple cross-limiting structures can balance the transmission efficiency in the pushing and pulling directions, ensuring the synchronism and linearity when the outer shell 100 and the ferrule 300 move along the axis of the pushing and pulling device.

[0046] Optionally, at least two cross-limiting structures are asymmetrically distributed with respect to the vertical direction of the axis of the pushing and pulling device.

[0047] In the embodiments of the present disclosure, in the asymmetric distribution in the direction perpendicular to the axis of the push-pull device, at least two cross-limiting structures can be diagonally distributed with respect to the axial section of the push-pull device. The diagonal layout maximizes the distance of the force application point from the axial center, significantly increasing the anti-torsion force arm. When plugging and unplugging, the lateral force is synchronously canceled by the diagonal limiting structures, avoiding unilateral stress concentration. In some other embodiments, the cross-limiting structures with diagonal distribution, such as the first protrusion structure 101 of the housing 100 and the second opening of the tail sleeve 200, can form non-complementary geometric features. For example, the inclination angle of the first protrusion structure 101 on the left side is 30° and there is a 45° dislocation with the first protrusion structure 101 on the right side. Physical interference will occur due to the mismatch of angles / height during reverse assembly, completely eliminating the possibility of misassembly. In addition, the diagonal asymmetry can also reduce the lateral dimension, and make the diagonal limiting and the elastic deformation of the U-shaped groove 204 of the tail sleeve 200 form a collaborative guidance, reducing the plugging and unplugging operation force and reducing the path linearity error to ensure precise docking.

[0048] In the embodiments of the present disclosure, the direction perpendicular to the axis of the push-pull device can refer to the direction perpendicular to the ground. At this time, the asymmetric distribution means that the cross-limiting structures are not on the same horizontal plane. It can also refer to other directions perpendicular to the axis of the push-pull device, such as the direction parallel to the ground. At this time, the asymmetric distribution means that the cross-limiting structures are not in the same plane perpendicular to the ground; or, the direction inclined at a 45° angle from the direction perpendicular to the ground to any direction perpendicular to the axis of the push-pull device.

[0049] In this way, the protrusion structures with asymmetric layout can form staggered binding forces in the radial and axial directions, effectively suppressing the inclination or torsion phenomenon of the housing 100 and the tail sleeve 200 caused by unilateral force. Moreover, the asymmetric distribution can disperse and transmit the push-pull force in different directions, avoiding stress concentration or local wear caused by symmetric structures, and can reduce the risk of jamming or loosening caused by structural imbalance to a certain extent. Therefore, the cross-limiting structures with asymmetric distribution can exert a limiting effect with complementary directions on the housing 100 and the tail sleeve 200 during the push-pull process. By asymmetrically distributing at least two cross-limiting structures in the direction perpendicular to the axis of the push-pull device, multi-dimensional differential constraints and force optimization are achieved.

[0050] Optionally, at least two cross-limiting structures are respectively arranged on two opposite side walls.

[0051] In the embodiments of the present disclosure, at least two cross-limiting structures can be arranged on the opposite left and right side walls, or can be arranged on the opposite upper and lower wall surfaces.

[0052] In the embodiments of the present disclosure, the two opposite side walls can be facing each other or be obliquely opposite. There is an included angle between the obliquely opposite side walls, and the relative direction is in a diagonal shape. Both the housing 100 and the tail sleeve 200 can be provided with obliquely opposite side walls, for example, the two opposite side walls are respectively inclined by a first angle or a second angle in the same direction or in opposite directions. At least two cross-limiting structures can be respectively arranged on the two obliquely opposite side walls. By respectively arranging at least two cross-limiting structures on the two obliquely opposite side walls, utilizing the asymmetric characteristics of the diagonal distribution, when pushing or pulling the tail sleeve, the obliquely opposite cross-limiting structures can further form staggered and asymmetric binding forces in the radial and axial directions, so as to better offset the torque generated by unilateral force.

[0053] In this way, since the cross-limiting structures on the opposite side walls act on both sides of the housing 100 and the tail sleeve 200 synchronously during the pushing and pulling process, the projection coincidence of the first convex structure 101 and the second convex structure 201 can form a two-way symmetric limit. Therefore, the limiting structures on both sides jointly limit the displacement of the housing 100 and the tail sleeve 200 in the radial and axial directions, and can avoid skewing or shaking caused by insufficient unilateral constraint. Moreover, the oppositely distributed limiting structures evenly disperse the pushing and pulling forces into the sliding paths of the two openings on both sides, and can also reduce the risk of deformation or wear of the unilateral convex structure due to concentrated force. By respectively arranging at least two cross-limiting structures on the two opposite side walls of the housing 100 or the tail sleeve 200, symmetric force application and balanced constraint are achieved, and the torque or non-axial component force that may be generated during the pushing and pulling process can be offset, ensuring that the axial movement of the housing 100 and the ferrule 300 is more linear and synchronous.

[0054] Optionally, the inclination angles of the first convex structures 101 of at least two cross-limiting structures are different; and / or, the inclination angles of the second convex structures 201 of at least two cross-limiting structures are different.

[0055] In the embodiments of the present disclosure, for different cross-limiting structures on the same tail sleeve 200 or housing 100, the inclination angles of the inclined surfaces of the first convex structures 101 and / or the second convex structures 201 are set to asymmetric values. For example, on different side walls of the housing 100, two groups of first convex structures 101 are provided, and the inclination angles of the inclined surfaces are α and β (for example, α = 30°, β = 45°) respectively, and the inclined surfaces are both inclined towards the rear end of the housing 100 (away from the tail sleeve 200), or on the corresponding side walls of the tail sleeve 200, two groups of second convex structures 201 are provided, and the inclination angles of the inclined surfaces are γ and δ (for example, γ = 25°, δ = 50°) respectively, and the inclined surfaces are both inclined towards the front end of the tail sleeve 200 (away from the housing 100).

[0056] In some other embodiments, optimization can also be performed for the pushing and pulling directions. For example, the bevel angle refers to the included angle between the side of the protruding structure close to the side wall and the side wall. The bevel angle of the first protruding structure 101 corresponding to the pulling direction is relatively small (such as 25°) to reduce the sliding resistance. The smaller the bevel angle, the higher the proportion of the axial component force and the lower the sliding resistance, which is suitable for the frequent unlocking requirements in high-density scenarios; the bevel angle of the second protruding structure 201 corresponding to the pushing direction is relatively large (such as 50°) to enhance the axial force transmission efficiency. The larger the bevel angle, the higher the normal pressure on the contact surface and the higher the axial force transmission efficiency, ensuring the stable connection of the ferrule 300.

[0057] In this way, due to the different inclined angles of the protruding structures of different cross-limiting structures, when the ferrule 200 is assembled with the housing 100, only when the inclined angle of the protruding structure completely matches the inclined direction of the corresponding opening can correct alignment be completed and projection coincidence be achieved. Therefore, a physical guiding constraint can be formed through the difference in the inclined angles, forcing the ferrule 200 and the housing 100 to be connected only along the preset direction, avoiding misalignment installation caused by angle deviation. Moreover, the protruding structures with different inclined angles generate a self-correcting effect through complementary inclined plane contacts during the assembly process, automatically adjusting the relative positions of the ferrule 200 and the housing 100, and can eliminate non-axial offsets caused by external forces or operation errors. By making the inclined 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 functions of the connection direction are achieved. Through the directional limitation of the geometric shape, it is ensured that the cross-limiting structure can be completely fitted only when it is correctly aligned, thus effectively preventing incorrect connection between the ferrule 200 and the housing 100 and improving the assembly accuracy and structural reliability.

[0058] Optionally, the axial position offsets of the first openings 102 of at least two cross-limiting structures are different; and / or, the axial position offsets of the second openings 202 of at least two cross-limiting structures are different.

[0059] In an embodiment of the present disclosure, on multiple side walls of the housing 100, two sets of first openings 102 are provided, and their starting positions in the axial direction of the pushing and pulling device are staggered by a certain distance. 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 to form a staged contact path. And / or, on the corresponding side walls of the tail sleeve 200, two sets of second openings 202 are provided, and their axial positions are complementarily offset from the first openings 102 of the housing 100 to ensure that the convex structures are sequentially engaged at different axial positions during pushing and pulling. Among them, the offset amount of each set of first openings 102 and the offset amount of the corresponding second openings 202 form a phase difference to achieve staged force application during the pushing and pulling action through the staggered layout. In some other embodiments, openings with a smaller offset amount can also be set to contact the corresponding protrusions first, so as to use the initial low-resistance path to guide the axial movement of the tail sleeve 200. At this stage, the contact surface pressure is relatively small, avoiding the instantaneous impact force during startup and reducing the risk of operation jamming. The openings with a larger offset amount contact the protrusions in the subsequent stage, enhancing the force transmission efficiency through a longer sliding path. At this stage, the contact surface pressure gradually increases to ensure the stable locking of the ferrule 300 and at the same time disperse the wear of the long-term force-bearing area.

[0060] In this way, due to the position differences of the openings of different cross-limiting structures in the axial direction of the pushing and pulling device, each convex structure contacts the opening at different axial positions during the pushing and pulling process. The axial offset of the opening disperses the pushing and pulling force to different contact points, which can further avoid local wear or deformation caused by single-point concentrated force and reduce the risk of jamming. Moreover, the axial position offset differences of the openings can also form physical guiding restrictions during assembly. Only when the tail sleeve 200 and the housing 100 are aligned at a preset angle and position, can each convex structure be inserted into the corresponding opening simultaneously, preventing incorrect connection caused by misalignment of the opening positions.

[0061] Optionally, the tail sleeve 200 includes a pushing and pulling handle 203. The pushing and pulling handle 203 is arranged at the end of the tail sleeve 200 on the side away from the housing 100. Among them, one side of the pushing and pulling handle 203 close to the end has unidirectional or multi-directional elasticity.

[0062] In an embodiment of the present disclosure, a plurality of U-shaped grooves 204 are arranged on one side of the pushing and pulling handle 203 close to the end along the axial direction and / or circumferential direction of the pushing and pulling device, so as to provide elasticity in the axial direction and / or circumferential direction and / or radial direction of the pushing and pulling device for one side of the pushing and pulling handle 203 close to the end.

[0063] In this way, during the pushing and pulling process, the elastic deformation can absorb the instantaneous impact force or non-axial load applied during operation, reduce the excessive bending or stretching of the optical fiber caused by sudden changes in external forces, and thus avoid signal attenuation or physical damage to the optical fiber due to too small bending radius or uneven stress. Moreover, by dispersing the direct force on the internal cable of the optical fiber connector during the pushing and pulling action through flexible deformation, it prevents the rapid displacement of the housing 100 and the ferrule 300 under rigid transmission from pulling or twisting the optical fiber, and reduces the risk of stress concentration at the connection between the optical fiber and the ferrule 300. In addition, the self-resetting characteristic of the elastic structure causes the handle to return to its initial state after the pushing and pulling is completed, ensuring the stable alignment of the tail sleeve 200 and the housing 100, and avoiding the optical fiber being in an unnatural bending state for a long time due to residual deformation. By arranging the push-pull handle 203 at the end of the tail sleeve 200 away from the housing 100 and configuring one-way or multi-directional elasticity on the side close to the end, the dual effects of bending protection of the optical fiber and buffering of the operating force are achieved. It not only improves the operating fluency of the optical fiber connector in high-density plugging and unplugging scenarios, but also enhances the physical protection of the optical fiber, ensuring the stability of optical signal transmission and the reliability of long-term use of the device.

[0064] Combined with Figures 1 - 10 As shown, the embodiment of the present disclosure also discloses an optical fiber connector, including the above-mentioned push-pull device for the optical fiber connector, and an inner shell 400 with a through cavity in the front and rear, a housing return spring 103 disposed in the gap between the inner shell 400 and the housing 100 for elastically pushing the housing 100 towards the front end of the inner shell 400, a sheath retaining ring 206, an aramid retaining ring 205, an inner spring 402, an inner spring pushing 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 further provided with a snap groove 401 for engaging and cooperating with a corresponding adapter in a hook-and-loop manner, and the housing 100 covers the snap groove 401 under the elastic force of the housing return spring 103.

[0065] In this way, when an operator needs to unlock the adapter from the optical fiber connector, by applying a force to the push-pull handle 203 at one end of the tail sleeve 200, through the cooperation of the above-mentioned push-pull device for the optical fiber connector, the housing 100 can be moved axially along the push-pull device towards the tail end of the inner shell 400, and the tail sleeve 200 can drive the housing 100 to move away from the outside of the snap groove 401 against the elastic force of the housing return spring 103, so that the adapter can be disengaged from the snap groove 401 on the inner shell 400. Thus, the operator can unlock the optical fiber connector by applying a force to the push-pull handle 203, which is convenient to operate; after releasing the applied force, the housing return spring 103 elastically returns and pushes the housing 100 to cover the snap groove 401 again.

[0066] Optionally, the inner spring push seat 403 includes a stopper 404 with its front end inserted into the inner cavity tail end of the inner shell 400. A limiting step 405 is formed by the tail end of the tail sleeve 200 protruding towards the inside of the tail sleeve 200. When the tail sleeve 200 moves forward to the forward limit position towards the front end of the inner shell 400 under the elastic force of the housing return spring 103 along with the housing 100, the limiting step 405 correspondingly abuts against the tail end face of the stopper 404 for limiting. By providing the limiting step 405 at the tail end of the tail sleeve 200, when the tail sleeve 200 moves forward to the forward limit position towards the front end of the inner shell 400 under the elastic force of the housing return spring 103 along with the housing 100, the limiting step 405 can abut against the tail end face of the stopper 404 to achieve limiting. The operator can also further insert the front end of the fiber optic connector into the adapter by applying force to the push-pull handle 203 to achieve locking with the adapter, which is convenient for operation. A threaded aramid compression ring 205 is provided at the rear end of the inner spring push seat 403, and a sheath compression ring 206 is provided between the outer surface of the rear end of the aramid compression ring 205 and the inner surface of the tail sleeve 200.

[0067] Optionally, a card slot 406 is provided on the outer wall of the inner shell 400, and a barb 104 corresponding to be received in the card slot 406 is provided on the inner wall of the housing 100. The barb 104 abuts against the inner wall of the card slot 406 on the side close to the front end of the inner shell 400 under the action of the housing return spring 103. A limiting flange 407 is provided at the tail end edge of the inner shell 400, and a stop block 408 is provided on the inner wall of the tail end of the housing 100 for cooperating with the limiting flange 407 to limit the rearward limit position of the housing 100 moving towards the rear end of the inner shell 400 and over-compressing the housing return spring 103. Through the cooperation of the barb 104 and the card slot 406, it can effectively prevent the housing 100 from disengaging from the front end of the inner shell 400. Through the cooperation of the limiting flange 407 and the stop block 408, it can effectively prevent the housing 100 from disengaging from the tail end of the inner shell 400 and limit the maximum moving stroke of the housing 100 moving towards the rear end of the inner shell 400.

[0068] Optionally, rear receiving grooves 409 are respectively provided at the tail end portions of the opposite outer walls of the inner shell 400, and the rear receiving grooves 409 extend to the limiting flange 407. Front receiving grooves 411 are correspondingly provided on the opposite inner walls of the housing 100, and the front receiving grooves 411 and the rear receiving grooves 409 communicate with each other to jointly form a spring groove for receiving the housing return spring 103. By controlling the deformation of the housing return spring 103 when the housing 100 moves towards the rear end of the inner shell 400 through the groove wall of the spring groove, so that the housing return spring 103 compresses and elongates along the preset compression direction, it can also effectively position the housing return spring 103.

[0069] Optionally, the fiber optic connector further includes a plugging component assembled in the front end of the inner cavity of the inner shell 400 and extending out from the front opening of the inner cavity, and an inner spring 402 disposed between the plugging component and the inner spring pushing seat 403. The inner spring 402 elastically pushes against the plugging component, enabling the plugging component to be fully docked with the inside of the adapter socket. At the same time, when the plugging component is subjected to a rigid force during the plugging process, the inner spring 402 can buffer the rigid force received by the plugging component to prevent the plugging component from being damaged.

[0070] Optionally, the plugging component includes the above-mentioned ferrule 300, guide pins 301, guide pin fixing seats 302, and a wire duct 310. Among them, the ferrule 300 is movably disposed in the inner cavity of the inner shell 400 and can move out and retract into the front part of the inner shell 400. The front part of the ferrule 300 has a multi-core optical fiber jack 303, and a socket communicating with the multi-core optical fiber jack 303 is provided at the tail. A protruding limit protrusion that cooperates with the limit boss provided at the front end of the inner wall of the inner shell 400 is provided on the outside. The ferrule 300 includes a multi-core optical fiber seat, and the multi-core optical fiber jack 303 is provided at the front part on the multi-core optical fiber seat. A socket communicating with the multi-core optical fiber jack 303 is provided inside the tail of the multi-core optical fiber seat. Guide through holes 308 are provided on both sides of the multi-core optical fiber seat. A glue injection opening 309 communicating with the socket is provided on the multi-core optical fiber seat. After the wire duct 310 is inserted together with the multi-core optical fiber, fixing glue can be injected into the glue injection opening 309 to fix the wire duct 310 on the multi-core optical fiber seat. One end of the inner spring 402 abuts against the stopper 404 of the inner spring pushing seat 403, and the other end abuts against the tail end face of the ferrule 300 and simultaneously sleeves the part of the wire duct 310 protruding from the tail end face of the ferrule 300.

[0071] Optionally, the guiding component is disposed at the tail end of the multi-core optical fiber seat, and it has guide pins 301 inserted into the guiding through holes 308 and guide pin fixing seats 302 for fixing the guide pins 301. A through groove corresponding to the socket is provided in the middle of the guide pin fixing seat 302; Optionally, the guiding component is made of metal, the guide pins 301 are PIN pins, and the guide pins 301 extend out from the front end face of the multi-core optical fiber seat. An inner spring 402 receiving groove 311 is provided at the tail end of the guide pin fixing seat 302, 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 to damage the optical fiber.

[0072] Optionally, a buckle extending outward is provided at the front end of the inner spring push seat 403 and is snap-fitted with a connection groove 410 provided at the front end of the inner shell 400. The connection groove 410 communicates with the accommodation groove where the outer shell return spring 103 is located. A stop portion 412 for stopping the end face of the inner shell 400 is provided at the tail end of the inner spring push seat 403. Positioning protrusions 413 extending a predetermined length in the axial direction of the push-pull device from the middle of the front end face of the stop portion 412 are respectively provided on the opposite side walls of the stop member 404. Positioning grooves 414 adapted to the shapes of the positioning protrusions 413 are provided in the inner cavity at positions corresponding to the positioning protrusions 413. By providing the stop portion 412, the length of the stop member 404 inserted into the inner shell 400 can be effectively limited. Moreover, through the mutual cooperation of the positioning protrusions 413 and the positioning grooves 414, the connection strength between the stop member 404 and the inner shell 400 can be effectively enhanced, and the anti-straight-pull and anti-side-pull capabilities are strong.

[0073] The above description and drawings sufficiently illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. Embodiments represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A push-pull device for an optical fiber connector, characterized in that, Comprising: A housing, drivingly connected to the ferrule. A tail sleeve, connected to the housing by at least two cross limiting structures, and the at least two cross limiting structures are asymmetrically distributed with respect to the vertical direction of the axis of the push-pull device. Wherein, when the tail sleeve is pushed or pulled, the housing and the ferrule can be moved along the axis of the push-pull device.

2. The device according to claim 1, wherein The cross limiting structure comprises: A first protrusion structure, arranged on the side wall of the housing. A second protrusion structure, arranged on the side wall of the tail sleeve. Wherein, the projections of the first protrusion structure and the second protrusion structure in the axial direction of the push-pull device at least partially overlap.

3. The device according to claim 2, wherein the inclination angles of the first protrusion structures of at least two cross limiting structures are different; and / or the inclination angles of the second protrusion structures of at least two cross limiting structures are different.

4. The device according to claim 2, wherein the first protrusion structure and the second protrusion structure can move relative to each other; wherein, when the first protrusion structure and the second protrusion structure are closest to each other, pulling the tail sleeve can drive the housing and the ferrule to move along the axis of the push-pull device, and when the first protrusion structure and the second protrusion structure are farthest from each other, pushing the tail sleeve can drive the housing and the ferrule to move along the axis of the push-pull device.

5. The device according to claim 2, characterized in that, The cross limiting structure further comprises: A first opening, arranged on the side wall of the housing, and the first protrusion structure is arranged on the side close to the tail sleeve of the first opening; A second opening, arranged on the side wall of the tail sleeve, and the second protrusion structure is arranged on the side close to the housing of the second opening; Wherein, when the housing and the tail sleeve are connected, the first protrusion structure and the second protrusion structure are respectively located in the second opening and the first opening, 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.

6. The device according to claim 5, wherein the axial position offsets of the first openings of at least two cross limiting structures are different; and / or the axial position offsets of the second openings of at least two cross limiting structures are different.

7. The device according to claim 1, wherein at least two cross limiting structures are diagonally distributed with respect to the axial section of the push-pull device.

8. The device according to claim 1, wherein at least two cross limiting structures are respectively arranged on two obliquely opposite side walls.

9. The device according to any one of claims 1 to 8, characterized in that, The tail sleeve comprises: A push-pull handle, arranged at the end of the tail sleeve far from the housing; Wherein, one side of the push-pull handle close to the end has single-directional or multi-directional elasticity.

10. An optical fiber connector, characterized in that, Comprising the push-pull device for an optical fiber connector according to any one of claims 1 to 9.

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