Optical fiber connector and optical fiber plugging structure thereof

Abstract

The invention relates to an optical fiber connector and an optical fiber plug-in structure thereof, the optical fiber plug-in structure comprises an installation part structure and an optical fiber plug core, the installation structure comprises a first installation part, a second installation part and a positioning sleeve, the first installation part is fixedly connected with the second installation part, and the positioning sleeve penetrates through the first installation part. The two axial ends of the positioning sleeve abut against the first installation piece and the second installation piece respectively. One end of the optical fiber ferrule is positioned in the second mounting piece, and the other end of the optical fiber ferrule penetrates through the positioning sleeve and is butted with another optical fiber ferrule in the positioning sleeve; wherein the positioning sleeve is provided with a gap along the axial direction, the positioning sleeve can elastically deform in the circumferential direction towards the direction of expanding and closing the gap, and the optical fiber insertion core is used for opening the positioning sleeve when being inserted into the positioning sleeve. The optical fiber insertion core is in butt joint with the other optical fiber insertion core in the positioning sleeve, so that the two optical fiber insertion cores can be accurately aligned under the unified cohesion of the positioning sleeve, the alignment accuracy is improved, and the loss of optical signals in connection is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of optical elements, and in particular to an optical fiber connector and an optical fiber plug-in structure thereof. Background Art

[0002] With the rapid development of optical fiber communication technology, high-density, low-loss optical fiber connectors have become key components of 5G networks and high-speed data centers. Optical fiber connectors use ceramic ferrules to achieve precise alignment of the fiber cores, and the core is to control lateral misalignment to reduce insertion loss. However, due to factors such as material processing accuracy and assembly accuracy, it is difficult for optical fiber connectors in traditional technologies to achieve higher precision alignment. Summary of the invention

[0003] Based on this, it is necessary to provide a fiber optic connector and a fiber optic plug-in structure thereof to address the problem that the fiber optic connector is difficult to achieve higher precision alignment.

[0004] On the one hand, the present application provides an optical fiber plug-in structure, the optical fiber plug-in structure includes a mounting structure and an optical fiber ferrule, the mounting structure includes a first mounting member, a second mounting member and a positioning sleeve, the first mounting member is fixedly connected to the second mounting member, the positioning sleeve is inserted through the first mounting member, and the axial ends of the positioning sleeve respectively abut the first mounting member and the second mounting member; one end of the optical fiber ferrule is located in the second mounting member, and the other end is inserted through the positioning sleeve and is used to connect with another optical fiber ferrule in the positioning sleeve; wherein the positioning sleeve is provided with a crack along the axial direction, and the positioning sleeve can be elastically deformed in the circumferential direction in the direction of expanding and closing the crack, and is used to open the positioning sleeve when the optical fiber ferrule is inserted into the positioning sleeve.

[0005] In one embodiment, the mounting structure further includes an intermediate sleeve, the first mounting member includes a first abutment portion, the intermediate sleeve includes a second abutment portion, the intermediate sleeve passes through the first mounting member and is sleeved on the outside of the positioning sleeve, the second abutment portion is located between the positioning sleeve and the second mounting member, one end of the positioning sleeve abuts against the first abutment portion, and the other end abuts against the second abutment portion.

[0006] In one embodiment, the first abutment portion is constructed as a first ring, the first mounting member is provided with a positioning hole, and the first ring is arranged on the inner wall of the positioning hole at one end away from the second mounting member; the second abutment portion is constructed as a second ring, the intermediate sleeve also includes a sleeve body, the second ring is connected to one end of the sleeve body close to the second mounting member, and the sleeve body is sleeved on the positioning sleeve.

[0007] In one embodiment, the optical fiber plug-in structure also includes an elastic abutment member, a mounting hole is opened in the second mounting member, a portion of the structure of the optical fiber core away from the first mounting member and the elastic abutment member are both arranged in the mounting hole, and the elastic abutment member abuts against the side of the optical fiber core away from the first mounting member.

[0008] In one of the embodiments, the optical fiber plug-in structure also includes a shell, the mounting structure is arranged in the shell, the mounting structure also includes a baffle, the baffle is located on the side of the second mounting member away from the first mounting member and is detachably fixed to the shell, the baffle abuts against the end of the elastic abutment member away from the optical fiber ferrule; the optical fiber plug-in structure also includes a jumper, the jumper is connected to the optical fiber ferrule, the baffle is provided with a through hole, and the jumper extends to the outside of the mounting structure through the through hole.

[0009] In one embodiment, there are multiple optical fiber ferrules and multiple positioning sleeves, and multiple optical fiber ferrules are provided with multiple positioning sleeves in a one-to-one correspondence.

[0010] In one embodiment, the mounting structure further includes a locking pin, one end of which abuts against the first mounting member, and the other end of which passes through the first mounting member and is fixedly connected to the second mounting member to lock the first mounting member and the second mounting member.

[0011] In one of the embodiments, the end of the locking pin protrudes from the end surface of the first mounting member so as to be used for positioning and plugging with the plug-in structure that is plugged into the optical fiber plug-in structure.

[0012] In one embodiment, the installation structure also includes a guide pin, one end of which is positioned and plugged with the first installation member, and the other end of which is positioned and plugged with the second installation member; and / or, the optical fiber plug-in structure also includes an outer shell, a tail shell, a tail nut and a wire sheath connected axially in sequence, and the optical fiber plug-in structure also includes a jumper connected to the optical fiber core, the installation structure is arranged in the outer shell, and the jumper passes through the tail shell, the tail nut and the wire sheath in sequence to extend to the outside.

[0013] On the other hand, the present application further provides a fiber optic connector, which includes a mating structure and the fiber optic plug-in structure as described above, and the mating structure is plugged into the fiber optic plug-in structure.

[0014] In the above optical fiber plug-in structure, the positioning sleeve is inserted into the first mounting part and can be elastically expanded and retracted in the circumferential direction. When the optical fiber ferrule is inserted into the positioning sleeve, it is used to open the positioning sleeve, so the positioning sleeve can hold the optical fiber ferrule tightly to fix it relative to the first mounting part. In addition, since the optical fiber ferrule is connected to another optical fiber ferrule in the positioning sleeve, the two optical fiber ferrules can be accurately aligned under the unified embrace of the positioning sleeve, thereby improving the alignment accuracy and reducing the loss of optical signals in the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic isometric view of an optical fiber connector provided in one embodiment of the present application.

[0016] Figure 2 This is an axonometric diagram of an optical fiber plug-in structure provided in one embodiment of the present application.

[0017] Figure 3 for Figure 2 A top view of the optical fiber plug-in structure shown.

[0018] Figure 4 for Figure 3 The cross-sectional view of the mounting structure and the optical fiber ferrule in the optical fiber plug-in structure is shown along the AA line.

[0019] Figure 5 for Figure 2 An axonometric schematic diagram of a positioning sleeve of an installation structure in the optical fiber splicing structure shown.

[0020] Figure 6 for Figure 2 An axonometric schematic diagram of an intermediate sleeve of an installation structure in an optical fiber splicing structure is shown.

[0021] Figure 7 for Figure 3 The optical fiber plug-in structure is shown in a cross-sectional view along line AA.

[0022] Figure 8 for Figure 2 An axonometric diagram of the mounting structure, optical fiber ferrule and locking pin in the optical fiber plug-in structure shown.

[0023] Fig. 9 for Figure 8 An exploded schematic diagram of the mounting structure, optical fiber ferrule and locking pin is shown.

[0024] Reference numerals: 10, optical fiber connector; 20, optical fiber plug-in structure; 30, plug-in structure; 100, mounting structure; 110, first mounting member; 111, positioning hole; 112, first ring; 113, plug-in hole; 114, receiving groove; 115, first connecting hole; 116, first hole section; 117, second hole section; 120, second mounting member; 121, mounting hole; 122, through hole; 123, positioning ring; 124, second connecting hole; 130, positioning sleeve; 131, slit; 140 , intermediate sleeve; 141, sleeve body; 142, second ring; 200, optical fiber ferrule; 210, core rod; 220, disk body; 300, elastic abutment; 400, baffle plate; 410, through hole; 420, annular groove; 500, locking pin; 510, plug column; 520, connecting rod; 600, guide pin; 710, outer shell; 711, step portion; 720, tail shell; 730, tail nut; 740, wire protection sleeve; 750, locking ring; 810, positioning key; 820, locking nut. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0031] See also Figure 1 , Figure 1 The optical fiber connector 10 provided in one embodiment of the present application includes an optical fiber plug-in structure 20 and a plug-in structure 30. The plug-in structure 30 is plugged with the optical fiber plug-in structure 20 to achieve the conduction of the optical signal. The optical fiber plug-in structure 20 and the plug-in structure 30 both include an optical fiber ferrule 200. The optical fiber ferrules 200 of the two are docked to achieve the conduction of the optical signal.

[0032] See also Figures 2 to 4One embodiment of the present application also provides a fiber optic plug-in structure 20, which includes a mounting structure 100 and a fiber optic ferrule 200. The mounting structure 100 is provided for mounting the fiber optic ferrule 200 and is used to position the fiber optic ferrule 200 so that it has an accurate position for accurate docking. The mounting structure 100 includes a first mounting member 110, a second mounting member 120 and a positioning sleeve 130. The first mounting member 110 is fixedly connected to the second mounting member 120, and the positioning sleeve 130 is passed through the first mounting member 110. The axial ends of the positioning sleeve 130 abut against the first mounting member 110 and the second mounting member 120, respectively. One end of the fiber optic ferrule 200 is located in the second mounting member 120, and the other end is passed through the positioning sleeve 130 and is used to dock with another fiber optic ferrule 200 in the positioning sleeve 130. Wherein combined Figure 5 The positioning sleeve 130 is provided with a split 131 along the axial direction, and the positioning sleeve 130 can be elastically deformed in the direction of expanding and closing the split 131 in the circumferential direction, and is used to open the positioning sleeve 130 when the optical fiber ferrule 200 is inserted into the positioning sleeve 130.

[0033] In the above-mentioned optical fiber plug-in structure 20, the positioning sleeve 130 is inserted into the first mounting member 110 and can be elastically expanded and retracted in the circumferential direction. When the optical fiber ferrule 200 is inserted into the positioning sleeve 130, it is used to open the positioning sleeve 130, so the positioning sleeve 130 can elastically hug the optical fiber ferrule 200 accordingly to fix it relative to the first mounting member 110. In addition, since the optical fiber ferrule 200 is docked with another optical fiber ferrule 200 in the positioning sleeve 130, the two optical fiber ferrules 200 can be accurately aligned under the unified embrace of the positioning sleeve 130, thereby improving the alignment accuracy and reducing the connection loss. It can be understood that the optical fiber ferrule 200 of the optical fiber plug-in structure 20 and the optical fiber ferrule 200 of the plug-in structure 30 can have exactly the same structure. Alternatively, at least the portion of the optical fiber ferrule 200 of the optical fiber plug-in structure 20 located in the positioning sleeve 130 has the same outer contour as the portion of the optical fiber ferrule 200 of the mating structure 30 located in the positioning sleeve 130 so as to be aligned under the unified engagement and positioning action of the positioning sleeve 130 .

[0034] Furthermore, since the positioning sleeve 130 also has the effect of elastically closing the crack 131, even in a certain vibration environment, the positioning sleeve 130 can hold the two aligned optical fiber ferrules 200 tightly, reduce the micro-displacement of the two caused by vibration and temperature changes, improve the stability of the connection, and enable the optical fiber connector 10 to efficiently and stably transmit optical signals. The positioning sleeve 130 can be configured to have an inner diameter slightly smaller than the outer diameter of the optical fiber ferrule 200 when it is in the initial state, so that the positioning sleeve 130 can be stretched open when the optical fiber ferrule 200 is inserted into the positioning sleeve 130. It can be understood that the positioning sleeve 130 can be stretched open when the optical fiber ferrule 200 is inserted into the positioning sleeve 130, so the force driving the axial insertion of the optical fiber ferrule 200 will also act on the positioning sleeve 130. In the present application, the axial ends of the positioning sleeve 130 are configured to abut the first mounting member 110 and the second mounting member 120 respectively, which can improve the axial position stability of the positioning sleeve 130 and enable the optical fiber ferrule 200 to be stably inserted into the positioning sleeve 130.

[0035] See also Figure 5 In one embodiment, the positioning sleeve 130 is a hollow tubular structure, and the slit 131 penetrates the positioning sleeve 130 along the radial direction of the positioning sleeve 130. In addition, the slit 131 can also penetrate the positioning sleeve 130 along the axial direction of the positioning sleeve 130, so as to facilitate the elastic expansion and contraction of the positioning sleeve 130 in its circumferential direction.

[0036] See also Figure 3 and Figure 4 In one embodiment, the first mounting member 110 is provided with a positioning hole 111, and the positioning sleeve 130 is inserted into the positioning hole 111. When the optical fiber ferrule 200 is inserted into the positioning sleeve 130, the positioning sleeve 130 is stretched and abuts against the inner wall of the positioning hole 111, so that the positioning sleeve 130 and the optical fiber ferrule in the positioning sleeve 130 can be fixed relative to the first mounting member 110.

[0037] Please continue reading Figure 4 In one embodiment, a mounting hole 121 is provided in the second mounting member 120, and a section of the optical fiber ferrule 200 is located in the mounting hole 121. In addition, the outer peripheral wall of the section of the optical fiber ferrule 200 located in the mounting hole 121 may be spaced apart from the inner circumferential wall of the mounting hole 121, so as to avoid the inner circumferential wall of the mounting hole 121 limiting the position of the optical fiber ferrule 200. Instead, the positioning sleeve 130 in the first mounting member 110 provides positioning, so as to avoid the problem of over-positioning of the optical fiber ferrule 200 in the direction perpendicular to its axial direction.

[0038] See also Figure 4In one embodiment, the mounting hole 121 is axially connected to the positioning hole 111. The mounting hole 121 has a through opening 122, which is located at one end of the mounting hole 121 close to the first mounting member 110. The mounting hole 121 is connected to the positioning hole 111 through the through opening 122, and the optical fiber ferrule 200 is inserted into the positioning hole 111 through the through opening 122.

[0039] See also Figure 4 In one embodiment, the optical fiber ferrule 200 includes a core rod 210 and a disk body 220, and the disk body 220 is connected to the outer periphery of the core rod 210. The hole wall of the mounting hole 121 protrudes inward to form a positioning ring 123, and the through-port 122 is opened in the positioning ring 123. The disk body 220 is located in the mounting hole 121 and abuts against the positioning ring 123, so that part of the core rod 210 is located in the positioning hole 111 and part is located in the mounting hole 121. Further, the core rod 210 includes a first section and a second section, the first section is located in the positioning hole 111, that is, the first section is used to penetrate the positioning sleeve 130 and open the positioning sleeve 130, the second section is located in the mounting hole 121, and the disk body 220 is connected to the outer periphery of the second section.

[0040] In one embodiment, regarding the axial fixation of the positioning sleeve 130 , one end of the positioning sleeve 130 for abutting against the second mounting member 120 may directly abut against one end of the second mounting member 120 having a through hole.

[0041] It is easy to understand that the positioning sleeve 130 can be elastically expanded or retracted, and it is usually constructed as a hollow tubular structure with a radial dimension that is similar to the radial dimension of the core rod 210 of the optical fiber ferrule 200, that is, the radial dimension of the positioning sleeve 130 is similar to the dimension of the through-port 122. At the same time, in order to enable the positioning sleeve 130 to elastically expand when the optical fiber ferrule 200 is inserted, the thickness dimension of the positioning sleeve 130 is usually set to be smaller, so that the positioning sleeve 130 is usually constructed to have a smaller end face area. Since the through-port 122 is opened in the positioning ring 123, the positioning ring 123 is formed by the protrusion of the hole wall of the mounting hole 121, and the thickness dimension is relatively small. Therefore, when the positioning sleeve 130 is subjected to an axial force, it will abut against the outer periphery of the through-port 122, and it is easy to crush the partial solid structure of the positioning ring 123 located at the outer periphery of the through-port 122. Based on this, combined with Figure 6In another embodiment, the positioning sleeve 130 can also be configured to indirectly abut against the second mounting member 120. At this time, the first mounting member 110 includes a first abutting portion. The mounting structure 100 also includes an intermediate sleeve 140, and the intermediate sleeve 140 includes a second abutting portion. The intermediate sleeve 140 passes through the first mounting member 110 and is sleeved outside the positioning sleeve 130, and the second abutting portion is located between the positioning sleeve 130 and the second mounting member 120. One end of the positioning sleeve 130 abuts against the first abutting portion, and the other end abuts against the second abutting portion. As a result, the positioning sleeve 130 indirectly abuts against the second mounting member 120 through the intermediate sleeve 140, and the positioning sleeve 130 can be conveniently constructed to have a thicker size, and bear the axial force together with the positioning ring 123, so it has a smaller chance of damage, so such a setting can improve the structural stability and service life of the optical fiber plug-in structure 20.

[0042] See also Figure 4 In one embodiment, the positioning hole 111 includes a first hole section 116 and a second hole section 117 that are interconnected. The inner diameter of the first hole section 116 matches the positioning sleeve 130 so that the positioning sleeve 130 can be inserted and fixed. The inner diameter of the second hole section 117 matches the intermediate sleeve 140 so that the intermediate sleeve 140 can be inserted. The inner diameter of the second hole section 117 is larger than that of the first hole section 116, and the second hole section 117 is closer to the second mounting member 120 than the first hole section 116.

[0043] See also Figure 4 and Figure 6 In one embodiment, the first abutting portion is configured as a first ring 112, and the first ring 112 is disposed on the inner wall of the end of the positioning hole 111 away from the second mounting member 120. The second abutting portion is configured as a second ring 142, and the intermediate sleeve 140 further includes a sleeve body 141, and the second ring 142 is connected to an end of the sleeve body 141 close to the second mounting member 120, and the sleeve body 141 is sleeved on the positioning sleeve 130. In other words, one end of the positioning sleeve 130 abuts against the first ring 112, and the other end abuts against the second ring 142, and the axial fixation is achieved by the second ring 142 abutting against the second mounting member 120.

[0044] Of course, in other embodiments, the first abutting portion and the second abutting portion may also be constructed as structures of other shapes besides the annular structure. For example, the first abutting portion and the second abutting portion may be constructed as blocks protruding from corresponding positions.

[0045] See also Figure 4In one embodiment, the first abutting portion is provided with a plug hole 113, and the plug hole 113 is used for inserting another optical fiber ferrule 200 into the positioning hole 111. The inner diameter of the plug hole 113 is smaller than the inner diameter of other areas in the positioning hole 111, so that the first abutting portion can be relatively protruding and abut against the positioning sleeve 130. The inner diameter of the plug hole 113 is larger than the outer diameter of the optical fiber ferrule 200, that is, the inner diameter of the plug hole 113 is larger than the inner diameter of the positioning sleeve 130 after being sleeved on the optical fiber ferrule 200. Therefore, when another optical fiber ferrule 200 is inserted into the positioning hole 111, the plug hole 113 can play a pre-positioning and guiding role, which facilitates the optical fiber ferrule 200 to quickly align with the positioning hole 111, and then insert it into the positioning sleeve 130 along the plug hole 113.

[0046] See also Figure 7 In one embodiment, the optical fiber plug-in structure 20 further includes an elastic abutment 300, a housing 710 and a baffle 400, and the mounting structure 100, the baffle 400 and the elastic abutment 300 are all disposed in the housing 710. The partial structure of the optical fiber ferrule 200 away from the first mounting member 110 and the elastic abutment 300 are both disposed in the mounting hole 121. The elastic abutment 300 abuts against the side of the optical fiber ferrule 200 away from the first mounting member 110, so that the two optical fiber ferrules 200 fit tightly on both end surfaces in the positioning sleeve 130, eliminating air gaps and reducing Fresnel reflection. In the field of optical communications, Fresnel reflection refers to the partial reflection phenomenon of optical signals at the interface of two media with different refractive indices. This phenomenon directly affects the performance of the optical fiber connector 10 (such as insertion loss and return loss). When two optical fiber ferrules 200 are connected, the elastic abutment 300 can be elastically compressed; when the optical fiber ferrule 200 of the plug-in structure 30 is pulled out, the elastic abutment 300 can push the optical fiber ferrule 200 to reset to a certain distance, so as to fit tightly with the optical fiber ferrule 200 of the plug-in structure 30 again.

[0047] Further, the elastic abutment member 300 is used to abut the tray body 220 from the side of the tray body 220 away from the first mounting member 110. The elastic abutment member 300 may be configured as a compression spring.

[0048] See also Figure 7 In one embodiment, the optical fiber plug-in structure 20 further includes a jumper (not shown in the figure, the same below), which is connected to the optical fiber ferrule 200. The baffle 400 is located on the side of the second mounting member 120 away from the first mounting member 110 and is detachably fixedly connected to the housing 710. The baffle 400 is connected to the end of the elastic abutment member 300 away from the optical fiber ferrule 200. In other words, the elastic abutment member 300 abuts between the baffle 400 and the disk body 220 of the optical fiber ferrule 200. The baffle 400 is provided with a through hole 410, and the jumper extends to the outside of the mounting structure 100 through the hole 410.

[0049] See also Figure 7 Combined with Fig. 9 Furthermore, in order to facilitate the installation of the optical fiber ferrule 200 and the jumper, the through hole 410 is usually configured to be directly connected to the circumferential outer side of the baffle 400. Furthermore, since the through hole 410 is connected to the circumferential outer side of the baffle 400, there is a probability that the jumper will escape from the through hole 410, so the outer peripheral wall of the baffle 400 can also be configured to be recessed to form an annular groove 420, and the optical fiber plug-in structure 20 also includes a ring member (not shown in the figure, the same below), which is sleeved in the annular groove 420 to close the through hole 410 after the optical fiber ferrule 200 and the jumper are installed. At the same time, the ring member can also be configured to be made of rubber, silicone and other materials to achieve a sealing effect.

[0050] See also Figure 7 In one embodiment, the optical fiber plug-in structure 20 further includes a locking ring 750, which is threadedly engaged with the inner wall of the housing 710, and the locking ring 750 abuts against a side of the baffle plate 400 away from the second mounting member 120 to cooperate with the second mounting member 120 to clamp the baffle plate 400.

[0051] Please continue reading Figure 7 In one embodiment, the housing 710 includes a step portion 711, which is disposed on the inner circumference of the housing 710, and abuts against one side of the second mounting member 120, and the lock ring 750 abuts against the other side of the second mounting member 120 through the baffle 400. Thus, the step portion 711 and the lock ring 750 can cooperate to clamp the second mounting member 120, so that the first mounting member 110 and other components installed on the mounting structure 100 are fixed relative to the housing 710.

[0052] See also Figure 8 , Fig. 9 , combined with Figure 7 In one embodiment, the optical fiber plug-in structure 20 further includes a guide pin 600, which is used to connect to two axially butted components in the optical fiber plug-in structure 20 to assist in axial positioning. For example, the number of the guide pins 600 can be multiple. Some of the guide pins 600 are connected between the baffle 400 and the second mounting member 120 to improve the alignment accuracy when the two are installed; for example, some of the guide pins 600 can be connected between the first mounting member 110 and the second mounting member 120 to improve the alignment accuracy when the two are installed.

[0053] See also Figures 7 to 9In one embodiment, the mounting structure 100 further includes a locking pin 500, one end of which abuts against the first mounting member 110, and the other end of which penetrates the first mounting member 110 and is fixedly connected to the second mounting member 120, so as to lock the first mounting member 110 and the second mounting member 120. In this embodiment, the first mounting member 110 and the second mounting member 120 are separately arranged and locked and connected by the locking pin 500, so that the intermediate sleeve 140 and the positioning sleeve 130 can be easily installed in the positioning hole 111 of the first mounting member 110.

[0054] Furthermore, the end of the locking pin 500 protrudes from the end surface of the first mounting member 110, so as to be positioned and plugged with the plugging structure 30 plugged with the optical fiber plugging structure 20. In other words, when the optical fiber plugging structure 20 is plugged with the plugging structure 30, the locking pin 500 can also play a preliminary positioning role, so as to facilitate accurate plugging of the two.

[0055] Please refer again Figure 7 and Figure 8 , combined with Figure 4 In one embodiment, the locking pin 500 includes a pair of plug posts 510 and a connecting rod 520, and the pair of plug posts 510 are axially connected to the connecting rod 520. A receiving groove 114 is recessed on a side of the first mounting member 110 that is away from the second mounting member 120, and a first connecting hole 115 is provided on the bottom wall of the receiving groove 114. The second mounting member 120 is provided with a second connecting hole 124, and the second connecting hole 124 is correspondingly connected to the first connecting hole 115. In the axial direction perpendicular to the locking pin 500, the size of the pair of plug posts 510 is larger than the size of the connecting rod 520, and the pair of plug posts 510 is located in the receiving groove 114 and abuts against the bottom wall of the receiving groove 114. The connecting rod 520 penetrates into the second connecting hole 124 through the first connecting hole 115 and is connected to the hole wall of the second connecting hole 124 to lock the first mounting member 110 and the second mounting member 120. Furthermore, a threaded structure is provided on the hole wall of the second connecting hole 124 , and the connecting rod 520 can be screwed and fixed to the hole wall of the second connecting hole 124 .

[0056] In one embodiment, a pattern may be provided on the outer periphery of the insertion column 510 to facilitate the operation of the locking pin 500 to connect and cooperate with the hole wall of the second connection hole 124 .

[0057] See also Figure 7In one embodiment, the number of the optical fiber ferrule 200 and the positioning sleeve 130 is multiple, and the multiple optical fiber ferrules 200 are provided with multiple positioning sleeves 130 in a one-to-one correspondence. That is to say, the optical fiber plug-in structure 20 provided in each embodiment of the present application can be configured as a multi-core optical fiber plug-in structure 20, and the optical fiber connector 10 can be configured as a multi-core optical fiber connector 10. Corresponding to the multiple optical fiber ferrules 200, structural features such as the positioning hole 111, the mounting hole 121 and the through hole 410 can also be configured as multiple. For example, the number of the optical fiber ferrule 200 and the positioning sleeve 130 can be 2, 3, 4, 5, 6, 7, 8, 9, etc.

[0058] See also Figure 7 In one embodiment, the optical fiber plug-in structure 20 further includes a positioning key 810, which is disposed on the first mounting member 110. The positioning key 810 is used to position the optical fiber plug-in structure 20 and the plug-in structure 30 when plugging them together, and to improve the relative position stability of the two after plugging.

[0059] Please refer again Figure 1 and Figure 2 In one embodiment, the optical fiber plug-in structure 20 further includes a tail housing 720, a tail nut 730 and a wire protection sleeve 740, and the outer shell 710, the tail housing 720, the tail nut 730 and the wire protection sleeve 740 are sequentially connected along the axial direction. The jumper extends from the installation structure 100 through the tail housing 720, the tail nut 730 and the wire protection sleeve 740 to the outside in sequence, and the protection of the three can reduce the probability of the jumper breaking. In one embodiment, the wire protection sleeve 740 can be configured as a wire protection spring.

[0060] In one embodiment, the optical fiber plug-in structure 20 also includes a locking nut 820, which is used to threadably cooperate with a screw connection component (not shown in the figure, the same below) of the plug-in structure 30 when the optical fiber plug-in structure 20 is plugged into the plug-in structure 30, so as to lock the relative positions of the optical fiber plug-in structure 20 and the plug-in structure 30 and reduce the risk of accidental separation of the two.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An optical fiber plug-in structure, characterized in that: The optical fiber plug-in structure comprises: A mounting structure, the mounting structure comprising a first mounting member, a second mounting member and a positioning sleeve, the first mounting member is fixedly connected to the second mounting member, the positioning sleeve is passed through the first mounting member, and the axial ends of the positioning sleeve abut against the first mounting member and the second mounting member respectively; An optical fiber ferrule, one end of which is located in the second mounting member, and the other end of which is passed through the positioning sleeve and is used to connect with another optical fiber ferrule in the positioning sleeve; The positioning sleeve is provided with a split in the axial direction, and the positioning sleeve can be elastically deformed in the circumferential direction in the direction of expanding and closing the split, and the optical fiber ferrule is used to open the positioning sleeve when it is inserted into the positioning sleeve.

2. The optical fiber plug-in structure according to claim 1, characterized in that: The mounting structure also includes an intermediate sleeve, the first mounting member includes a first abutment portion, the intermediate sleeve includes a second abutment portion, the intermediate sleeve passes through the first mounting member and is sleeved on the outside of the positioning sleeve, the second abutment portion is located between the positioning sleeve and the second mounting member, one end of the positioning sleeve abuts against the first abutment portion, and the other end abuts against the second abutment portion.

3. The optical fiber plug-in structure according to claim 2, characterized in that: The first abutment portion is configured as a first ring, the first mounting member is provided with a positioning hole, and the first ring is provided on an inner wall of the positioning hole at an end away from the second mounting member; The second abutting portion is constructed as a second ring, the intermediate sleeve further comprises a sleeve body, the second ring is connected to one end of the sleeve body close to the second mounting member, and the sleeve body is sleeved on the positioning sleeve.

4. The optical fiber plug-in structure according to claim 1, characterized in that: The optical fiber plug-in structure also includes an elastic abutment member, a mounting hole is opened in the second mounting member, a part of the optical fiber core away from the first mounting member and the elastic abutment member are both arranged in the mounting hole, and the elastic abutment member abuts against the side of the optical fiber core away from the first mounting member.

5. The optical fiber plug-in structure according to claim 4, characterized in that: The optical fiber plug-in structure further includes a housing, the mounting structure is arranged in the housing, and the mounting structure further includes a baffle, the baffle is located on a side of the second mounting member away from the first mounting member and is detachably fixedly connected to the housing, and the baffle abuts against an end of the elastic abutment member away from the optical fiber plug core; The optical fiber plug-in structure also includes a jumper, which is connected to the optical fiber ferrule. The baffle is provided with a via hole, and the jumper extends to the outside of the installation structure through the via hole.

6. The optical fiber plug-in structure according to claim 1, characterized in that: There are multiple optical fiber ferrules and multiple positioning sleeves, and multiple optical fiber ferrules are provided with multiple positioning sleeves in a one-to-one correspondence.

7. The optical fiber plug-in structure according to claim 1, characterized in that: The mounting structure further includes a locking pin, one end of which abuts against the first mounting member, and the other end of which passes through the first mounting member and is fixedly connected to the second mounting member to lock the first mounting member and the second mounting member.

8. The optical fiber plug-in structure according to claim 7, characterized in that: The end of the locking pin protrudes from the end surface of the first mounting member so as to be positioned and plugged with the plug-in structure plugged with the optical fiber plug-in structure.

9. The optical fiber plug-in structure according to claim 1, characterized in that: The mounting structure further comprises a guide pin, one end of which is positioned and plugged with the first mounting member, and the other end of which is positioned and plugged with the second mounting member; and / or The optical fiber plug-in structure also includes an outer shell, a tail shell, a tail nut and a wire protection sleeve which are axially connected in sequence. The optical fiber plug-in structure also includes a jumper connected to the optical fiber ferrule. The mounting structure is arranged in the outer shell. The jumper passes through the tail shell, the tail nut and the wire protection sleeve in sequence and extends to the outside.

10. An optical fiber connector, characterized in that: The optical fiber connector comprises a mating structure and an optical fiber plug-in structure according to any one of claims 1 to 9, and the mating structure is plugged into the optical fiber plug-in structure.

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