Optical fiber hot melting connector

Abstract

The utility model discloses an optical fiber hot-melt connector, and relates to the technical field of optical fiber connectors, the optical fiber hot-melt connector provided by the utility model comprises a shell, an insertion core and a protective cover, a preset optical fiber is arranged in the insertion core in a penetrating manner, and the insertion core is arranged in the shell in a penetrating manner and partially protrudes out of the shell; the protection cover is detachably connected with one end, protruding out of the shell, of the insertion core and covers the preset optical fiber, in the transportation process and the assembling process, the protection cover is kept covering the end portion of the insertion core, and after the preset optical fiber and an optical fiber to be connected are welded and assembled to the optical fiber hot melting connector, the protection cover is fixed to the end portion of the insertion core. The protective cover can be opened, and the insertion core is inserted into the optical fiber adapter for normal use. According to the utility model, the end face of the preset optical fiber is covered by the protective cover, so that dust and other pollutants in the environment are prevented from being contacted with the end face of the preset optical fiber, and the risk that the preset optical fiber is polluted is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of optical fiber connector, especially relates to an optical fiber hot melt connector. BACKGROUND

[0002] The optical fiber connector is an indispensable device in the optical fiber communication system, and can be used with the optical fiber adapter, mainly used for realizing the detachable connection between the optical fiber and the optical fiber, and between the optical fiber and the equipment. According to the different connection modes, the optical fiber connector mainly includes two kinds of optical fiber hot melt connector and optical fiber mechanical connector.

[0003] In the related art, the optical fiber hot melt connector has a ferrule and a shell, the ferrule is used for realizing the installation and positioning of the optical fiber in the shell of the optical fiber hot melt connector, the ferrule is arranged in the shell of the optical fiber hot melt connector and partially protrudes from the shell, so that the ferrule can be inserted into the optical fiber adapter, and the end faces of the two optical fibers are accurately aligned. The pre-installed optical fiber is arranged through the ferrule, and the pre-installed optical fiber is fused with the to-be-connected optical fiber connected to the optical fiber hot melt connector.

[0004] Since the ferrule partially protrudes from the shell, the end face of the pre-installed optical fiber in the ferrule is exposed to the external environment, and before being connected to the optical fiber adapter, it is easy to be contaminated, thereby affecting the optical signal quality transmitted by the optical fiber connector and increasing the optical signal insertion loss. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide an optical fiber hot melt connector, which aims to reduce the risk of pollution of the pre-installed optical fiber in the optical fiber hot melt connector.

[0006] In order to achieve the above purpose, the utility model provides an optical fiber hot melt connector, which comprises a shell, a ferrule and a protective cover, the ferrule is provided with a pre-installed optical fiber, the ferrule is arranged in the shell and partially protrudes from the shell, the protective cover is detachably connected with one end of the ferrule protruding from the shell and covers the pre-installed optical fiber.

[0007] In an embodiment, the protective cover comprises a cover body, a connecting part and a holding part, the cover body is sleeved on one end of the ferrule protruding from the shell, the connecting part is connected with one end of the cover body away from the ferrule, and the holding part is connected with the connecting part.

[0008] In an embodiment, the cover body, the connecting part and the holding part are integrally formed; and / or, the connecting part is an elastic structure.

[0009] In an embodiment, the optical fiber hot melt connector further comprises a first connecting sleeve and a second connecting sleeve; the second connecting sleeve is detachably connected with the first connecting sleeve; an installation channel is formed in the first connecting sleeve and the second connecting sleeve and penetrates through the first connecting sleeve and the second connecting sleeve; the shell is arranged outside the first connecting sleeve and the second connecting sleeve; the ferrule is arranged in the installation channel and connected with the first connecting sleeve, and the ferrule penetrates through the first connecting sleeve and the shell in sequence and partially protrudes from the shell.

[0010] In an embodiment, an inner wall of the first connecting sleeve is provided with a convex rib, and an outer wall of the ferrule is provided with a convex boss; the convex boss is located on a side of the convex rib facing the second connecting sleeve, and the convex rib, the convex boss and the second connecting sleeve abut in sequence.

[0011] In an embodiment, the optical fiber hot melt connector further comprises a spring, and an inner wall of the second connecting sleeve is provided with a containing groove extending along a circumference of the second connecting sleeve; the spring is arranged in the containing groove, and one end of the spring abuts against a bottom wall of the containing groove, and the other end of the spring abuts against the convex boss.

[0012] In an embodiment, the first connecting sleeve is provided with a clamping hole, and an outer wall of the second connecting sleeve is provided with a clamping protrusion; the outer wall of the second connecting sleeve is inserted into the inner wall of the first connecting sleeve, and the clamping protrusion is clamped with the inner wall of the clamping hole.

[0013] In an embodiment, the first connecting sleeve is provided with a first matching part, and the first connecting sleeve is provided with an identification part; the identification part is arranged correspondingly to the first matching part; the ferrule is provided with a second matching part; the second matching part is inserted into the first matching part; one of the first matching part and the second matching part is an insertion protrusion, and the other is an insertion groove.

[0014] In an embodiment, the first connecting sleeve is further provided with a rotation-stopping groove facing the second connecting sleeve, and an outer wall of the second connecting sleeve is further provided with a rotation-stopping protrusion; when the clamping protrusion is clamped with the inner wall of the clamping hole, the rotation-stopping protrusion is inserted into the inner wall of the rotation-stopping groove.

[0015] In an embodiment, the optical fiber hot melt connector further comprises an anti-bending tail sleeve; the anti-bending tail sleeve comprises a fixed sleeve and an elastic sleeve connected with each other; an overline channel is formed in the anti-bending tail sleeve and penetrates through the fixed sleeve and the elastic sleeve; the fixed sleeve is arranged outside an outer wall of the second connecting sleeve, and the overline channel is in communication with the installation channel; and / or the optical fiber hot melt connector further comprises a heat shrink tube; the heat shrink tube is arranged in the installation channel and arranged outside an outer wall of an end of the ferrule away from the protective cover.

[0016] The optical fiber hot melt connector provided by the utility model comprises a shell, a plug core and a protective cover, a preset optical fiber is arranged in the plug core in a penetrating manner, the plug core is arranged in the shell and partially protrudes from the shell, and the protective cover is detachably connected with one end of the plug core protruding from the shell and covers the preset optical fiber. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative labor.

[0018] Figure 1 The structural schematic diagram of an embodiment of the optical fiber hot melt connector provided by the utility model is shown in the figure.

[0019] Figure 2 The structural schematic diagram of the optical fiber hot melt connector in the figure is shown in the figure. Figure 1

[0020] Figure 3 The front view of the optical fiber hot melt connector in the figure is shown in the figure. Figure 1

[0021] Figure 4 The sectional view along the line A-A' of the optical fiber hot melt connector in the figure is shown in the figure. Figure 3

[0022] Figure 5 The structural schematic diagram of the first connecting sleeve in the figure is shown in the figure. Figure 2

[0023] Figure 6 The structural schematic diagram of the first connecting sleeve in the figure is shown in the figure. Figure 5

[0024] Figure 7 The structural schematic diagram of the plug core in the figure is shown in the figure. Figure 2

[0025] Figure 8 The structural schematic diagram of the shell in the figure is shown in the figure. Figure 2

[0026] Figure 9 The structural schematic diagram of the shell in the figure is shown in the figure. Figure 2 ​​​​​​​Structure diagram of second connecting sleeve.

[0027] Explanation of reference numerals:

[0028] 1000, optical fiber hot melt connector;

[0029] 1, housing; 1a, front opening; 1b, rear opening; 1c, first clamping groove;

[0030] 2, ferrule; 21, pre-arranged optical fiber; 22, boss; 2a, insertion slot;

[0031] 3, protective cover; 31, cover body; 32, connecting part; 33, holding part;

[0032] 4a, mounting channel;

[0033] 41, first connecting sleeve; 411, protruding rib; 412, insertion protrusion; 413, identification part; 414, first clamping protrusion; 415, stop block; 41a, clamping hole; 41b, rotation stopping groove; 41c, first opening; 41d, second opening;

[0034] 42, second connecting sleeve; 421, clamping protrusion; 422, rotation stopping protrusion; 423, second clamping protrusion; 42a, accommodating groove;

[0035] 5, spring;

[0036] 6, anti-bending tail sleeve; 61, fixing sleeve; 61a, second clamping groove; 62, elastic sleeve; 6a, wire passing channel;

[0037] 7, heat shrink tube;

[0038] 2000, optical fiber to be connected.

[0039] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0041] It should be noted that if the embodiments of the utility model have the direction indication (such as up, down, left, right, front, back, etc.), the direction indication is only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, if the specific posture changes, the direction indication also changes accordingly.

[0042] In addition, if the embodiments of the utility model have the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing in the whole text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0043] The utility model provides a kind of optical fiber hot melt connector 1000.

[0044] Please refer to Figures 1 to 4 In an embodiment of the utility model, the optical fiber hot melt connector 1000 includes shell 1, plug 2 and protective cover 3, and the preset optical fiber 21 is arranged in plug 2, and plug 2 is arranged in shell 1 and partially protrudes from shell 1;The protruding end of plug 2 from shell 1 is detachably connected with protective cover 3 and covers the preset optical fiber 21.

[0045] In the embodiment, shell 1 is the main structure of optical fiber hot melt connector 1000, and a receiving space is formed in shell 1 for receiving plug 2 and other internal connection structures.In the embodiment, the receiving space is strip-shaped and penetrates shell 1, forming two opposite openings in front and back on shell 1, wherein plug 2 passes through the front opening 1a and is exposed to shell 1, and protective cover 3 is arranged in the front opening 1a and extends into shell 1 to cover plug 2 and the preset optical fiber 21, and protective cover 3 can be sleeved on the outer peripheral wall of plug 2 to prevent the end face of the preset optical fiber 21 from being contaminated.The shape of the outer peripheral wall of the front opening 1a is matched with the socket of the fiber adapter so as to be inserted into the fiber adapter.The to-be-connected optical fiber 2000 extends into the receiving space from the rear opening 1b and is fused with the preset optical fiber 21 in plug 2.Shell 1 can be made of metal or high-strength plastic and has dustproof and moisture-proof functions, for example, can be made of aluminum alloy and subjected to anodic oxidation treatment on the surface to enhance wear resistance and corrosion resistance.

[0046] The ferrule 2 is a core component of the optical fiber hot melt connector 1000, and is used to realize accurate alignment between two optical fibers and fusion with the optical fiber 2000 to be connected. A pre-arranged optical fiber 21 is arranged through the ferrule 2. A plug-in channel can be arranged in the ferrule 2 for the pre-arranged optical fiber 21 to be inserted. The pre-arranged optical fiber 21 partially protrudes from the ferrule 2 and extends into the accommodation space, so as to be fused with the optical fiber 2000 to be connected. As shown in FIG. 11B, point B is the fusion point of the pre-arranged optical fiber 21 and the optical fiber 2000 to be connected. The ferrule 2 can be made of ceramic material, and has the characteristics of high precision and low loss. The pre-arranged optical fiber 21 can be a single-mode or multi-mode optical fiber, which can be selected according to actual application requirements, for example, a G.652 single-mode optical fiber is used, which is suitable for long-distance communication. Figure 4

[0047] The protective cover 3 is used to cover the pre-arranged optical fiber 21 of the protruding part of the ferrule 2, so as to prevent the pre-arranged optical fiber 21 from being polluted. The protective cover 3 can be sleeved on the outer peripheral wall of the ferrule 2. After the optical fiber hot melt connector 1000 and the optical fiber 2000 to be connected are assembled, the protective cover 3 can be removed, so that the ferrule 2 is plugged into the optical fiber adapter. The protective cover 3 can be made of transparent plastic or silica gel, and is easy to install and disassemble. For example, the silica gel material is resistant to high temperature and aging, so that the long-term use in harsh environments is ensured.

[0048] In the optical fiber hot melt connector 1000 of the embodiment, since the protective cover 3 covers the pre-arranged optical fiber 21 of the protruding part of the ferrule 2, the dust, oil stains and other pollutants in the external environment are effectively isolated, so that the risk of pollution of the pre-arranged optical fiber 21 is greatly reduced. The end face of the pre-arranged optical fiber 21 remains clean, the scattering and absorption of the optical signal in the transmission process are reduced, the quality of the optical signal is improved, and the insertion loss is reduced. In addition, the design of the protective cover 3 not only prevents pollution, but also reduces the possibility of mechanical damage to the end face of the pre-arranged optical fiber 21, and enhances the stability and reliability of the optical fiber connection.

[0049] Further, referring to Figure 1 In an embodiment of the utility model, the protective cover 3 includes a cover body 31, a connecting part 32 and a holding part 33. The cover body 31 is sleeved on one end of the ferrule 2 protruding from the shell 1. The connecting part 32 is connected to one end of the cover body 31 away from the ferrule 2. The holding part 33 is connected to the connecting part 32.

[0050] In the embodiment, the cover body 31 is the main part of the protective cover 3, which is used to cover the protruding part of the ferrule 2 and provide additional protection. The cover body 31 has a cylindrical structure and is sleeved on the outer sidewall of the ferrule 2. The cover body 31 can be arranged in a clearance fit or an interference fit with the ferrule 2. The cover body 31 can be made of a material with elasticity, for example, the cover body 31 can be made of transparent plastic or high-temperature-resistant silica gel, which has dustproof and moisture-proof functions. For example, the cover body 31 is made of polycarbonate material, which enhances the wear resistance and anti-aging performance.

[0051] ​The connecting part 32 is a connecting part 32 between the protective cover 3 and the holding part 33, which is used to extend the distance between the protective cover 3 and the holding part 33, so that the user can hold the holding part 33 more firmly. The connecting part 32 can adopt a strip-shaped structure, such as a columnar or rod-shaped structure. The connecting part 32 can be integrally formed with the protective cover 3 to enhance the tensile strength of the connecting part 32 and the protective cover 3.

[0052] The holding part 33 is used to facilitate the user to hold it, so as to avoid the user to directly hold the cover body 31 and slip off. The holding part 33 can be provided in a shape that is convenient for the user to hold, such as a ring shape, which is convenient for the user to hook with fingers, or a protrusion with a size larger than the connecting part 32, which is convenient for the user to hold with fingers.

[0053] The embodiment improves the convenience when the cover body 31 is taken off from the plug core 2 by arranging the connecting part 32 and the holding part 33 outside the cover body 31, and avoids the situation that the cover body 31 is difficult to take off due to the over-tight fitting of the cover body 31 and the plug core 2.

[0054] Further, referring to Figure 1 In an embodiment of the utility model, the cover body 31, the connecting part 32 and the holding part 33 are integrally formed; and / or, the connecting part 32 is an elastic structure.

[0055] In the embodiment, the cover body 31, the connecting part 32 and the holding part 33 are manufactured by an integral molding process, so that the three parts are formed as a whole through a single manufacturing process. This structure can be realized by injection molding, extrusion or other molding techniques. The integrally formed structure eliminates the potential weak points when multiple components are assembled, such as the fracture or looseness that may occur at the joint, thereby improving the strength and stability of the overall structure. The integrally formed structure also reduces the assembly steps in the manufacturing process, reduces the production cost and potential assembly errors, and improves the production efficiency. The connecting part 32 is designed to have an elastic structure, so that the connecting part 32 can be bent, which facilitates the user to adjust the posture and direction when applying tension to the cover body 31, and improves the convenience of taking off the cover body 31.

[0056] Further, referring to Figure 2 , Figure 4 and Figure 8 In an embodiment of the utility model, the optical fiber hot melt connector 1000 further comprises a first connecting sleeve 41 and a second connecting sleeve 42; the second connecting sleeve 42 is detachably connected with the first connecting sleeve 41, the first connecting sleeve 41 and the second connecting sleeve 42 form an installation channel 4a that penetrates through the first connecting sleeve 41 and the second connecting sleeve 42, and the shell 1 is sleeved outside the first connecting sleeve 41 and the second connecting sleeve 42; the plug core 2 is arranged in the installation channel 4a and connected with the first connecting sleeve 41, and the plug core 2 sequentially penetrates through the first connecting sleeve 41 and the shell 1 and partially protrudes from the shell 1.

[0057] In this embodiment, the second connecting sleeve 42 is detachably connected to the first connecting sleeve 41. An installation channel 4a is formed within both the first and second connecting sleeves 41 and 42, penetrating both sleeves. The installation channel 4a is used to accommodate the optical fiber 2000 to be connected and the pre-placed optical fiber 21, and the splice point between the pre-placed optical fiber 21 and the optical fiber 2000 to be connected. Figure 4 Point B is located within installation channel 4a. Since the optical fiber near the splice point is relatively fragile, the second connecting sleeve 42 and the first connecting sleeve 41 provide protection for the optical fiber 2000 to be connected and the pre-installed optical fiber 21 near the splice point. The second connecting sleeve 42 and the first connecting sleeve 41 can be detachably connected by using threads. It should be noted that this method requires a sufficiently large installation channel 4a to prevent damage to the already spliced ​​optical fiber during tightening. Alternatively, the second connecting sleeve 42 and the first connecting sleeve 41 can be detachably connected using an insert-type locking structure. This method allows for a straight-line insertion and avoids damage to the already spliced ​​optical fiber.

[0058] The ferrule 2 is disposed within the mounting channel 4a and connected to the first connecting sleeve 41. The ferrule 2 passes through the first connecting sleeve 41 and the outer shell 1 in sequence and partially protrudes from the outer shell 1. The mounting channel 4a passes through the first connecting sleeve 41 and forms a first opening 41c and a second opening 41d on the first connecting sleeve 41. The first opening 41c is provided corresponding to the front opening 1a on the outer shell 1. The ferrule 2 is disposed within the mounting channel 4a inside the first connecting sleeve 41 and is engaged with the inner wall of the mounting channel 4a. The ferrule 2 passes through the first opening 41c and the front opening 1a in sequence and partially protrudes from the outer shell 1 so as to be plugged into the fiber optic adapter.

[0059] The first connecting sleeve 41 is sleeved outside the first connecting sleeve 41 and the second connecting sleeve 42, and the inner side wall of the shell 1 is provided with a first clamping groove 1c, and the outer wall of the first connecting sleeve 41 is provided with a first clamping convex 414, and the length of the first clamping groove 1c is greater than that of the first clamping convex 414; when the shell 1 and the washing connecting sleeve are close to each other and are sleeved outside the first connecting sleeve 41, the first clamping convex 414 is in sliding clamping connection with the inner wall of the first clamping groove 1c, that is, the first clamping convex 414 can slide along the inner wall of the first clamping groove 1c but cannot rotate, and at this time, if the first connecting sleeve 41 moves away from the shell 1, the first clamping convex 414 will abut against the inner wall of the first clamping groove 1c to prevent the two from being separated. The outer wall of the first connecting sleeve 41 is further provided with a stop block 415, and the stop block 415 is arranged in a spaced manner with the first clamping convex 414; after the first clamping convex 414 is clamped into the first clamping groove 1c, the stop block 415 also enters the first clamping groove 1c and abuts against the other inner wall of the first clamping groove 1c, that is, the first clamping convex 414 and the stop block 415 can abut against the opposite two inner walls of the first clamping groove 1c, respectively, so that the first connecting sleeve 41 can be prevented from being separated from the shell 1, and the clamping connection between the first connecting sleeve 41 and the shell 1 is achieved. As described above, the optical fiber hot melting connector 1000 of the embodiment can be quickly assembled through the sequential clamping of the shell 1, the first connecting sleeve 41 and the second connecting sleeve 42.

[0060] Further, please refer to Figures 4 to 7 In an embodiment of the present application, the inner wall of the first connecting sleeve 41 is provided with a convex rib 411, and the outer wall of the plug core 2 is formed with a convex boss 22; the convex boss 22 is located on the side of the convex rib 411 facing the second connecting sleeve 42, and the convex rib 411, the convex boss 22 and the second connecting sleeve 42 abut against each other in sequence.

[0061] In the embodiment, the inner wall of the first connecting sleeve 41 is provided with a convex rib 411, the convex rib 411 is arranged in extension along the circumference of the mounting channel 4a in the first connecting sleeve 41, and the outer wall of the plug core 2 is formed with a convex boss 22, the convex boss 22 is arranged in extension along the circumference of the plug core 2; during assembly, the plug core 2 is put into the first connecting sleeve 41 from the second opening 41d, the plug core 2 can partially pass through the convex rib 411 and extend out of the first connecting sleeve 41 through the first opening 41c, but the convex boss 22 cannot pass through the convex rib 411; as the plug core 2 continues to penetrate, the convex boss 22 will abut against the side of the convex rib 411 away from the first opening 41c, which can prevent the plug core 2 from being pulled out of the first connecting sleeve 41 through the first opening 41c, for example, when the optical fiber hot melting connector 1000 is pulled out of the optical fiber adapter, the plug core 2 can be prevented from being pulled out. Then the second connecting sleeve 42 is inserted into the first connecting sleeve 41, and the second connecting sleeve 42 abuts against the side of the convex boss 22 away from the convex rib 411, that is, the convex rib 411, the convex boss 22 and the second connecting sleeve 42 abut against each other in sequence, so that they are tightly abutted against each other, ensuring that the connection is tight and firm.

[0062] Further, please refer to Figure 2 , Figure 4 andFigure 9 In an embodiment of the present application, the optical fiber hot melt connector 1000 further comprises a spring 5, and the inner wall of the second connecting sleeve 42 is provided with an accommodating groove 42a extending in the circumferential direction of the second connecting sleeve 42; the spring 5 is arranged in the accommodating groove 42a, and one end of the spring 5 abuts against the bottom wall of the accommodating groove 42a, and the other end of the spring 5 abuts against the boss 22.

[0063] In the embodiment, the inner wall of one end of the second connecting sleeve 42 close to the first connecting sleeve 41 is provided with the accommodating groove 42a, the accommodating groove 42a is an annular groove, and the accommodating groove 42a extends along the inner periphery of the second connecting sleeve 42. The spring 5 is located in the accommodating groove 42a, one end of the spring 5 abuts against the bottom wall of the accommodating groove 42a, and the other end of the spring 5 abuts against the side of the boss 22 away from the protruding rib 411. The first connecting sleeve 41 and the second connecting sleeve 42 are connected by clamping through the cooperation of the clamping protrusion 421 and the clamping hole 41a, and when the optical fiber hot melt connector 1000 is inserted into the optical fiber adapter, the ferrule 2 is inserted into the insertion hole in the optical fiber adapter, the ferrule 2 is subjected to a pressing force and transmits the pressing force to the spring 5, the spring 5 is compressed, and the elastic force of the spring 5 acts on the ferrule 2, and in this process, the ferrule 2 can be elastically movable to adapt to the optical fiber adapter, thereby realizing the function of automatic docking.

[0064] Further, please refer to Figure 5 , Figure 6 and Figure 9 In an embodiment of the present application, the first connecting sleeve 41 is provided with the clamping hole 41a, and the outer wall of the second connecting sleeve 42 is provided with the clamping protrusion 421; the outer wall of the second connecting sleeve 42 is inserted into the inner wall of the first connecting sleeve 41, and the clamping protrusion 421 is clamped with the inner wall of the clamping hole 41a.

[0065] In the embodiment, the opposite two inner side walls of the first connecting sleeve 41 are respectively provided with one clamping hole 41a, and the opposite two outer side walls of the second connecting sleeve are respectively provided with one clamping protrusion 421; when the second connecting sleeve 42 is inserted into the first connecting sleeve 41, each clamping protrusion 421 is clamped with the inner wall of one clamping hole 41a, so that the clamping of the first connecting sleeve 41 and the second connecting sleeve 42 is realized. By connecting the first connecting sleeve 41 and the second connecting sleeve 42 in this way, only a simple linear motion is required when assembling the two, without the need for complex operations such as screwing, which is convenient for assembly operation and can prevent the optical fiber inside from being pulled and twisted to be damaged.

[0066] Further, please refer to Figures 5 to 7In the embodiment of the utility model, first connecting sleeve 41 is equipped with first matching part, first connecting sleeve 41 is equipped with mark part 413, mark part 413 is correspondingly arranged with first matching part, and second matching part is arranged on plug core 2, and second matching part is inserted with first matching part;First matching part and second matching part, one is inserted protrusion 412, and the other is insertion slot 2a.

[0067] In the embodiment, if first connecting sleeve 41 and plug core 2 rotate relatively, the internal optical fiber is easy to be damaged by torsion, therefore, inserted protrusion 412 is arranged on the inner wall of first connecting sleeve 41, and insertion slot 2a is arranged on the outer wall of plug core 2, when first connecting sleeve 41 and plug core 2 are inserted with each other, inserted protrusion 412 is inserted into insertion slot 2a and can prevent plug core 2 from rotating relative to first connecting sleeve 41. Further, if insertion slot 2a or protrusion is arranged in pairs and symmetrically, the user is not easy to distinguish the corresponding relationship of insertion slot 2a and protrusion during assembly, and the plug-in error may be caused, therefore, one inserted protrusion 412 is arranged in first connecting sleeve 41, and one insertion slot 2a is correspondingly arranged on plug core 2, so that the unique insertion relationship is determined, the misoperation is avoided, and the foolproof effect is achieved.

[0068] Further, inserted protrusion 412 is hidden in first connecting sleeve 41 and is not easy to be directly observed, in order to facilitate assembly, mark part 413 is arranged on the outer wall of first connecting sleeve 41 corresponding to inserted protrusion 412, mark part 413 can be arranged as protrusion or recess with recognition degree, such as being arranged as protrusion or recess with character shape, and further dyeing treatment can be carried out, such as dyeing with color different from first connecting sleeve 41.

[0069] It should be noted that the positions of inserted protrusion 412 and insertion slot 2a can be exchanged without affecting the function of preventing first connecting sleeve 41 and plug core 2 from rotating, such as arranging insertion slot 2a on first connecting sleeve 41 and arranging inserted protrusion 412 on plug core 2, therefore, inserted protrusion 412 or insertion slot 2a arranged on first connecting sleeve 41 is called first matching part, and insertion slot 2a or inserted protrusion 412 arranged on plug core 2 is called second matching part. In this way, by arranging first matching part, second matching part and mark part 413, the effects of preventing plug core 2 from rotating relative to first connecting sleeve 41 and foolproof are achieved.

[0070] Further, please refer to Figure 2 、 Figure 5 、 Figure 6 And Figure 9In an embodiment of the utility model, first connecting sleeve 41 still is equipped with the rotation stop groove 41b to second connecting sleeve 42, and the outer wall of second connecting sleeve 42 is equipped with rotation stop boss 422, when the inner wall of the rotation stop boss 422 is inserted into the rotation stop groove 41b, the inner wall of the clamping protrusion 421 is clamped with the clamping hole 41a.

[0071] In the embodiment, the first connecting sleeve 41 is provided with the rotation stop groove 41b towards the second connecting sleeve 42, and the outer wall of the second connecting sleeve 42 is provided with the rotation stop boss 422 matched with the rotation stop groove 41b, when assembling, the second connecting sleeve 42 is inserted into the first connecting sleeve 41 and the rotation stop boss 422 is inserted into the rotation stop groove 41b, which prevents the second connecting sleeve 42 from rotating relative to the first connecting sleeve 41. Further, considering that multiple symmetrical rotation stop grooves 41b or rotation stop bosses 422 are provided, it is easy to cause the user to insert incorrectly when assembling, and only one rotation stop groove 41b and one rotation stop boss 422 can be provided, which has the effect of preventing mistakes.

[0072] Further, referring to Figures 2 to 4 In an embodiment of the utility model, the optical fiber hot melt connector 1000 further comprises a bending-resistant tail sleeve 6, the bending-resistant tail sleeve 6 comprises a fixed sleeve 61 and an elastic sleeve 62 connected with each other, and a wire passing channel 6a is formed in the bending-resistant tail sleeve 6 and penetrates through the fixed sleeve 61 and the elastic sleeve 62, the fixed sleeve 61 is sleeved on the outer wall of the second connecting sleeve 42, and the wire passing channel 6a is in communication with the mounting channel 4a, and / or the optical fiber hot melt connector 1000 further comprises a heat shrink tube 7, the heat shrink tube 7 is located in the mounting channel 4a and is sleeved on the outer wall of the end of the ferrule 2 away from the protective cover 3.

[0073] In the embodiment, the second connecting sleeve 42 is sleeved with the bending-resistant tail sleeve 6 at the end away from the first connecting sleeve 41, the bending-resistant tail sleeve 6 comprises a fixed sleeve 61 and an elastic sleeve 62 connected with each other, the fixed sleeve 61 and the elastic sleeve 62 are both hollow and form the wire passing channel 6a, the fixed sleeve 61 is sleeved on the outer wall of the second connecting sleeve 42 to make the wire passing channel 6a in communication with the mounting channel 4a, the inner wall of the fixed sleeve 61 is provided with a second clamping groove 61a, the outer wall of the second connecting sleeve 42 is provided with a second clamping protrusion 423 extending along the circumference of the second connecting sleeve 42, and when the fixed sleeve 61 is sleeved on the outer wall of the second connecting sleeve 42, the second clamping protrusion 423 is clamped with the inner wall of the second clamping groove 61a. The elastic sleeve 62 is made of elastic material, the to-be-connected optical fiber 2000 is arranged in the elastic sleeve 62 and connected with the elastic sleeve 62, and the elastic member can be elastically deformed to a certain extent to limit the bending degree of the to-be-connected optical fiber 2000, so as to prevent the to-be-connected optical fiber 2000 from being damaged due to excessive bending.

[0074] The optical fiber hot melt connector 1000 further comprises a heat shrink tube 7, which is located in the mounting channel 4a and sleeved on the outer wall of the end of the ferrule 2 away from the protective cover 3. After the pre-arranged optical fiber 21 is fused with the to-be-connected optical fiber 2000, the two ends of the heat shrink tube 7 are respectively sleeved on the outer side walls of the to-be-connected optical fiber 2000 and the ferrule 2 and the like, and heat shrinkage is performed to make the ferrule 2, the heat shrink sleeve and the to-be-connected optical fiber 2000 connected in sequence as a whole. The heat shrink tube 7 is mainly used to provide tensile resistance to prevent the fused optical fiber from being pulled apart. In addition, the heat shrink tube 7 also provides a sealed environment for the internal optical fiber to prevent the internal optical fiber from being contaminated.

[0075] The above merely describes exemplary embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application, as described in the present application and the drawings, is included in the patent protection scope of the present application.

Claims

1. An optical fiber fusion splicer, characterized by, The optical fiber hot melt connector comprises: a shell (1); a ferrule (2) with a pre-installed optical fiber (21) penetratingly arranged therein, the ferrule (2) being arranged in the shell (1) and partially protruding from the shell (1); and a protective cover (3) detachably connected with one end of the ferrule (2) protruding from the shell (1) and covering the pre-installed optical fiber (21).

2. The optical fiber fusion splicer of claim 1, wherein, The protective cover (3) comprises a cover body (31), a connecting portion (32) and a holding portion (33); the cover body (31) is sleeved on one end of the ferrule (2) protruding from the shell (1), the connecting portion (32) is connected with one end of the cover body (31) away from the ferrule (2), and the holding portion (33) is connected with the connecting portion (32).

3. The optical fiber fusion splicer of claim 2, wherein, The cover body (31), the connecting portion (32) and the holding portion (33) are integrally formed; and / or, the connecting portion (32) is an elastic structure.

4. The optical fiber fusion splicer of any one of claims 1 to 3, wherein, The optical fiber hot melt connector further comprises a first connecting sleeve (41) and a second connecting sleeve (42); the second connecting sleeve (42) is detachably connected with the first connecting sleeve (41), the first connecting sleeve (41) and the second connecting sleeve (42) are formed with an installation channel (4a) penetrating through the first connecting sleeve (41) and the second connecting sleeve (42), and the shell (1) is sleeved outside the first connecting sleeve (41) and the second connecting sleeve (42); the ferrule (2) is arranged in the installation channel (4a) and connected with the first connecting sleeve (41), and the ferrule (2) sequentially passes through the first connecting sleeve (41) and the shell (1) and partially protrudes from the shell (1).

5. The optical fiber fusion splicer of claim 4, wherein, An inner wall of the first connecting sleeve (41) is provided with a convex rib (411), and an outer wall of the ferrule (2) is formed with a convex platform (22); the convex platform (22) is located on a side of the convex rib (411) facing the second connecting sleeve (42), and the convex rib (411), the convex platform (22) and the second connecting sleeve (42) abut in sequence.

6. The optical fiber fusion splicer of claim 5, wherein, The optical fiber hot melt connector further comprises a spring (5), and an inner wall of the second connecting sleeve (42) is provided with an accommodating groove (42a) extending in a circumferential direction of the second connecting sleeve (42); the spring (5) is arranged in the accommodating groove (42a), one end of the spring (5) abuts against a bottom wall of the accommodating groove (42a), and the other end of the spring (5) abuts against the convex platform (22).

7. The optical fiber fusion splicer of claim 4, wherein, The first connecting sleeve (41) is provided with a clamping hole (41a), and an outer wall of the second connecting sleeve (42) is provided with a clamping protrusion (421); the outer wall of the second connecting sleeve (42) is inserted into the inner wall of the first connecting sleeve (41), and the clamping protrusion (421) is clamped with the inner wall of the clamping hole (41a).

8. The optical fiber fusion splicer of claim 7, wherein, The first connecting sleeve (41) is provided with a first matching part, and the first connecting sleeve (41) is provided with an identification part (413) outside, the identification part (413) is provided correspondingly with the first matching part, the plug core (2) is provided with a second matching part, and the second matching part is inserted with the first matching part. The first matching part and the second matching part, one of which is an insertion protrusion (412), and the other is an insertion slot (2a).

9. The optical fiber fusion splicer of claim 7, wherein, The first connecting sleeve (41) is further provided with a rotation stopping groove (41b) towards the second connecting sleeve (42), and the outer wall of the second connecting sleeve (42) is further provided with a rotation stopping protrusion (422). When the clamping protrusion (421) is clamped with the inner wall of the clamping hole (41a), the rotation stopping protrusion (422) is inserted with the inner wall of the rotation stopping groove (41b).

10. The optical fiber fusion splicer of claim 4, wherein, The optical fiber hot melting connector further comprises an anti-bending tail sleeve (6), the anti-bending tail sleeve (6) comprises a fixed sleeve (61) and an elastic sleeve (62) connected with each other, the anti-bending tail sleeve (6) is formed with a wire passing channel (6a) penetrating through the fixed sleeve (61) and the elastic sleeve (62), the fixed sleeve (61) is sleeved on the outer wall of the second connecting sleeve (42), and the wire passing channel (6a) is communicated with the mounting channel (4a); And / or, the optical fiber hot melting connector further comprises a heat shrink tube, the heat shrink tube is located in the mounting channel (4a) and is sleeved on the outer wall of the end of the plug core (2) away from the protective cover (3).

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