Prefabricated end head assembly of optical fiber hot melting connector and assembling method thereof

Abstract

The invention discloses an optical fiber hot melting connector prefabricated end head assembly and an assembling method thereof, the optical fiber hot melting connector prefabricated end head assembly comprises a mounting main body, a connecting seat inserted on the mounting main body and a retaining ring clamped on the mounting main body, and the retaining ring abuts against the connecting seat to limit the connecting seat to be separated from the mounting main body; the mounting main body is provided with an optical fiber connecting part, the optical fiber connecting part comprises an insertion core and a bare optical fiber inserted in the insertion core, the connecting seat comprises an insertion part for mounting the insertion core and a fiber protecting part for protecting the bare optical fiber, a fiber protecting channel is formed in the fiber protecting part, the insertion core is inserted in the insertion part, and the bare optical fiber is inserted in the insertion part. And the bare optical fiber penetrates through the fiber protection channel and extends out of the fiber protection channel at a fixed length.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber connectors, and particularly to a prefabricated end component of an optical fiber fusion connector and an assembly method thereof. Background Art

[0002] An optical fiber fusion connector is a device that realizes the permanent connection of optical fibers through high-temperature fusion. It uses arc discharge to fuse the two ends of the optical fibers to form a low-loss (typical value < 0.03 dB), highly reliable optical signal transmission channel. Its core components include a precision V-groove, an electrode rod, and an optical fiber alignment system. The operation requires a fusion splicer to complete the core alignment and fusion. It is suitable for long-distance, high-bandwidth scenarios such as telecommunications and data centers, and has advantages such as small insertion loss, strong anti-vibration performance, and long service life. However, it requires professional construction and is not detachable. The fusion joint is usually protected by a heat-shrinkable sleeve to ensure mechanical strength and environmental stability, and it is a key component in optical fiber network cabling.

[0003] However, the optical fiber on the existing connector end part is an optical fiber with a protective layer. Before fusion splicing, it is necessary to strip the protective layer and the coating layer and perform fixed-length cutting to expose the bare optical fiber for fusion splicing with the pigtail. During the stripping operation, it is very easy to cause the core to break, resulting in the need to replace the new end head. This is not only inconvenient to operate but also causes a significant increase in the use cost. Summary of the Invention

[0004] To solve the technical problems in the background art, the present invention provides a prefabricated end component of an optical fiber fusion connector and an assembly method thereof.

[0005] The technical solutions adopted by the present invention to solve its technical problems are as follows:

[0006] The prefabricated end component of the optical fiber fusion connector includes an installation main body, a connection seat inserted on the installation main body, and a retaining ring clamped on the installation main body. The retaining ring abuts against the connection seat to limit the connection seat from detaching from the installation main body;

[0007] An optical fiber connection part is provided on the installation main body. The optical fiber connection part includes an optical fiber ferrule and a bare optical fiber inserted on the optical fiber ferrule. The connection seat includes a plug-in part for installing the optical fiber ferrule and a fiber protection part for protecting the bare optical fiber. A fiber protection channel is formed in the fiber protection part. The optical fiber ferrule is inserted on the plug-in part, and the bare optical fiber passes through the fiber protection channel and extends out of the fiber protection channel with a fixed length.

[0008] Preferably, the plug-in part and the fiber protection part are integrally formed. Through the above improvement, forming the plug-in part and the fiber protection part integrally can not only greatly improve the structural strength of the entire connection seat but also reduce the number of parts to improve the assembly efficiency.

[0009] Preferably, the length of the bare optical fiber is X, the length of the bare optical fiber placed in the fiber protection channel is 0.45X - 0.48X, and the length of the bare optical fiber extending out of the fiber protection channel is 0.21X - 0.24X. Through the above improvements, the bare optical fiber with a quantitative length is placed in the fiber protection part to ensure the stability of the bare optical fiber and avoid breakage during transportation and transfer. And the bare optical fiber with a quantitative length extends out of the fiber protection part. When splicing with the optical cable, operations such as cutting, peeling, and stripping the coating are not required, greatly improving the convenience of the operation and the splicing efficiency.

[0010] Preferably, the fiber protection channel includes a guiding section, a limiting section, and a transition section connecting the guiding section and the limiting section. The caliber of the limiting section is smaller than that of the guiding section. The caliber of the transition section gradually decreases along the extending direction of the bare optical fiber and forms a fiber guiding arc surface. Through the above improvements, during the connection process between the optical fiber connector and the connecting seat, the bare optical fiber first enters the guiding section and then enters the limiting section through the guiding of the transition section, improving the smoothness and safety of the bare optical fiber during the plugging process.

[0011] Preferably, a first clamping convex part is formed on the anti - withdrawal ring, a first clamping groove for the first clamping convex part to be placed in is formed on the mounting body, and an elastic element is arranged on the anti - withdrawal ring. One end of the elastic element abuts against the anti - withdrawal ring and the other end abuts against the connecting seat to limit the connecting seat from detaching from the mounting body. Through the above improvements, the elastic element is used to abut against the connecting seat, so that the connecting seat abuts against the mounting body, thereby ensuring the reliability and stability of the connection seat installation.

[0012] Preferably, a detachable dust cover is sleeved on the ferrule and the connecting seat. A placement groove for the dust cover to be placed in is formed on the mounting body. Biting teeth for abutting against the dust cover are formed on the connecting seat. When the dust cover is sleeved on the connecting seat, the part of the bare optical fiber extending out of the fiber protection channel is placed in the dust cover. Through the above improvements, the dust cover can be used to prevent external dust and other impurities from adhering to the bare optical fiber, thereby improving the splicing quality.

[0013] Preferably, a rotation - stopping groove is formed on the mounting body, and the end of the connecting seat is inserted into the rotation - stopping groove. Through the above improvements, the rotation of the connecting seat is avoided to improve the stability of the bare optical fiber and ensure the splicing quality.

[0014] Preferably, a first guiding convex part is formed on the anti - withdrawal ring, and a guiding groove for the first guiding convex part to be placed in is formed on the mounting body. Through the above improvements, the convenience of the anti - withdrawal ring during the installation process is improved.

[0015] An assembling method for a pre - fabricated end component of an optical fiber fusion connector includes the following steps:

[0016] S0: Quantitative cutting: Select a bare fiber reel and use a cutting device to cut the bare fiber reel into bare fibers of a quantitative length;

[0017] S1: Assembly of the optical fiber connection part: Insert the bare fiber onto the ferrule to form an optical fiber connection part;

[0018] S2: Installation of the connection seat: Insert the optical fiber connection part onto the connection seat, insert the ferrule onto the connection seat, and pass the bare fiber through the connection seat and expose it outside the connection seat. Then insert the connection seat with the installed optical fiber connection part into the installation main body to complete the preliminary installation of the connection seat;

[0019] S3: Fixing of the connection seat: Sheath an elastic element on the connection seat, and snap a retaining ring on the installation main body. The retaining ring abuts against the elastic element, so that the elastic element abuts against the connection seat to fix the connection seat on the installation main body.

[0020] Preferably, after step S3, there is also step S4 Installation of the dust cover. Clean the ferrule and the bare fiber exposed outside the connection seat, and sheath a dust cover on the bottom of the ferrule and the connection seat, place the bare fiber in the dust cover. Through the above improvements, the cleanliness of the surface of the bare fiber and the ferrule is ensured, thereby improving the fusion splicing quality and the connection stability of the connector.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] By inserting a connection seat on the installation main body and arranging an optical fiber connection part on the connection seat, the optical fiber connection part includes a ferrule and a bare fiber inserted on the ferrule. The connection seat includes a plugging part for installing the ferrule and a fiber protection part for protecting the bare fiber. A fiber protection channel is formed in the fiber protection part. The ferrule is inserted on the plugging part, and the bare fiber passes through the fiber protection channel. The fiber protection part is used to protect the bare fiber and limit the extending strength of the bare fiber. When it is necessary to perform fusion splicing with a pigtail cable, operations such as cutting, peeling, and stripping the coating layer are not required. Compared with the conventional connector structure, the fusion splicing is more convenient, and the risk of fiber breakage is greatly reduced. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the overall end component of the present invention;

[0024] Figure 2 It is a cross-sectional view of the overall end component of the present invention;

[0025] Figure 3 It is a comparison diagram of the optical fiber connection part of the present invention and the optical fiber connection part in the prior art;

[0026] Figure 4 It is a schematic structural diagram of the installation main body of the present invention;

[0027] Figure 5 Schematic structural diagram of the anti-backlash ring of the present invention;

[0028] Figure 6 Schematic structural diagram of the cooperation between the connection base and the optical fiber connection part of the present invention;

[0029] Figure 7 Schematic structural diagram of the connection base of the present invention;

[0030] Figure 8 Schematic structural diagram of the cooperation between the installation main body and the tail sleeve of the present invention;

[0031] Figure 9 Exploded view of the cooperation between the installation main body and the dust cover of the present invention;

[0032] Figure 10 Cross-sectional view of the dust cover of the present invention;

[0033] In the figure: 1. Installation main body; 2. Connection base; 3. Anti-backlash ring; 4. Optical fiber connection part; 5. Dust cover; 6. Tail sleeve; 1.1. Ferrule; 1.2. Bare optical fiber; 1.3. Insertion part; 1.4. Optical fiber protection part; 1.5. Optical fiber protection channel; 2.1. Guiding section; 2.2. Limiting section; 2.3. Transition section; 2.4. Optical fiber guiding arc surface; 3.1. First clamping convex part; 3.2. First clamping groove; 3.3. Second clamping convex part; 3.4. Second clamping groove; 3.5. Elastic element; 3.6. Insertion groove; 3.7. Biting teeth; 3.8. Anti-rotation groove; 4.1. First guiding convex part; 4.2. Second guiding convex part; 4.3. Guiding groove; 5.1. Disassembly part; 5.2. Cleaning piece; Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be understood that although the terms upper, middle, lower, top, one end, etc. appear in this text to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for easy understanding, rather than to define any directional or sequential limitations.

[0036] As Figure 1-9 shown, the prefabricated end head assembly of the optical fiber fusion connector includes an installation main body 1, a connection base 2 inserted on the installation main body 1, and an anti-backlash ring 3 clamped on the installation main body 1. The anti-backlash ring 3 abuts against the connection base 2 to limit the connection base 2 from detaching from the installation main body 1.

[0037] Specifically, an optical fiber connection part 4 is provided on the installation main body 1. The optical fiber connection part 4 includes an insert core 1.1 and a bare optical fiber 1.2 inserted on the insert core 1.1. The connection base 2 includes a plug-in part 1.3 for installing the insert core 1.1 and a fiber protection part 1.4 for protecting the bare optical fiber 1.2. A fiber protection channel 1.5 is formed in the fiber protection part 1.4. The insert core 1.1 is inserted on the plug-in part 1.3, and the bare optical fiber 1.2 is inserted through the fiber protection channel 1.5 and extends out of the fiber protection channel 1.5 with a fixed length.

[0038] During daily use, generally, a fusion splicer is used to fuse the end head and the distribution cable. The end head structure in the prior art uses a conventional optical fiber. It is necessary to first strip the epidermis with a wire stripping clip, then strip the coating layer on the surface of the optical fiber, then use a cutting knife to cut the optical fiber into a suitable length, and finally place it on the fusion splicer to fuse with the distribution cable. During the process of stripping the epidermis and the coating layer, it is easy to break the fiber core (bare optical fiber), resulting in the need to re-strip or replace the end head. When the end head in this application is used, it only needs to directly place the end head assembly on the fusion splicer to fuse the bare optical fiber 1.2 with the optical fiber part of the distribution cable, greatly improving the convenience during the fusion process and reducing the risk of fiber core breakage.

[0039] Among them, the fusion splicer, the wire stripping clip, and the cutting knife all belong to the prior art in the industry, so no more details will be described.

[0040] As Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 shown, as a further explanation of the implementation manner of the connection base 2, the plug-in part 1.3 and the fiber protection part 1.4 are integrally formed. Integrally forming the plug-in part 1.3 and the fiber protection part 1.4 can not only greatly improve the structural strength of the entire connection base 2, but also reduce the number of components to improve the assembly efficiency.

[0041] Specifically, a rotation prevention groove 4.1 is formed on the installation main body 1. The end of the connection base 2 is inserted into the rotation prevention groove 4.1. Both sides of the plug-in part 1.3 form rotation prevention planes. When the plug-in part 1.3 is inserted into the rotation prevention groove 4.1, the rotation prevention planes will be engaged with the rotation prevention groove 4.1, thereby restricting the circumferential rotation of the connection base 2 to improve the stability of the bare optical fiber 1.2 and improve the fusion quality.

[0042] As Figure 2 、 Figure 3 、 Figure 6 、 Figure 7As shown in the figure, for a further explanation of the cooperation between the connection base 2 and the optical fiber connection part 4, a slot is formed on the insertion part 1.3, the ferrule 1.1 is placed in the slot, and the bare optical fiber 1.2 is placed in the optical fiber protection channel 1.5 of the optical fiber protection part 1.4. The optical fiber protection channel 1.5 includes a guiding section 2.1, a limiting section 2.2, and a transition section 2.3 connecting the guiding section 2.1 and the limiting section 2.2. The diameter of the limiting section 2.2 is smaller than that of the guiding section 2.1, and the diameter of the transition section 2.3 gradually decreases along the extending direction of the bare optical fiber 1.2, forming a fiber guiding arc surface 2.4.

[0043] During the connection process between the optical fiber connector and the connection base 2, the bare optical fiber 1.2 first enters the guiding section 2.1, and then enters the limiting section 2.2 through the guiding of the transition section 2.3. The transition section 2.3 improves the smoothness and safety of the bare optical fiber 1.2 during the insertion process. And because the diameter of the limiting section 2.2 is smaller than that of the guiding section 2.1, the relative position of the bare optical fiber 1.2 is limited, so as to improve the convenience when splicing with the distribution cable.

[0044] Specifically, the length of the bare optical fiber 1.2 is X, the length of the bare optical fiber 1.2 placed in the optical fiber protection channel 1.5 is 0.45X - 0.48X, and the length of the bare optical fiber 1.2 extending out of the optical fiber protection channel 1.5 is 0.21X - 0.24X. For example, the length of the bare optical fiber 1.2 is 35mm, the length inserted into the ferrule 1.1 is 10.5mm, the length of the bare optical fiber 1.2 placed in the optical fiber protection channel 1.5 is 16.5mm, and the length of the bare optical fiber 1.2 extending out of the optical fiber protection channel 1.5 is 8mm. The bare optical fiber 1.2 with a quantitative length is placed in the optical fiber protection part 1.4 to ensure the stability of the bare optical fiber 1.2 and avoid breakage during transportation and transfer. And the bare optical fiber 1.2 with a quantitative length extends out of the optical fiber protection part 1.4. Thus, when splicing with the distribution cable, operations such as cutting, peeling, and stripping the coating are not required, greatly improving the convenience of operation and the splicing efficiency.

[0045] In addition, the bare optical fiber 1.2 with a quantitative length extends out of the optical fiber protection part 1.4. Using the elasticity of the bare optical fiber 1.2 itself, it will not break easily at an appropriate length, greatly reducing the risk of breakage of the bare optical fiber 1.2 during the process of peeling the epidermis and coating.

[0046] Such as Figure 2 、 Figure 4 、 Figure 5As shown in the figure, for a further explanation of the anti-return ring 3, a first clamping protrusion 3.1 is formed on the anti-return ring 3, a first clamping groove 3.2 for the first clamping protrusion 3.1 to be inserted into is formed on the mounting body 1, and an elastic element 3.5 is arranged on the anti-return ring 3. One end of the elastic element 3.5 abuts against the anti-return ring 3, and the other end abuts against the connecting seat 2 to limit the connecting seat 2 from detaching from the mounting body 1. By using the elastic element 3.5 to abut against the connecting seat 2, the connecting seat 2 is abutted against the mounting body 1, thus ensuring the reliability and stability of the installation of the connecting seat 2.

[0047] Further, a first guiding protrusion 4.1 is formed on the anti-return ring 3, a guiding groove 4.3 for the first guiding protrusion 4.1 to be inserted into is formed on the mounting body 1. During the assembly process, the first guiding protrusion 4.1 slides along the guiding groove 4.3, so that the first clamping protrusion 3.1 is inserted into the first clamping groove 3.2, thereby improving the convenience of the anti-return ring 3 during the installation process.

[0048] As Figure 8 shown, for a further explanation of the connection between the mounting body and the tail sleeve, the mounting body 1 can be connected to the tail sleeve 6. A second clamping protrusion 3.3 is formed on the tail sleeve 6, a second clamping groove 3.4 for the second clamping protrusion 3.3 to be inserted into is formed on the mounting body 1, and a second guiding protrusion 4.2 is formed on the tail sleeve 6. The second guiding protrusion 4.2 is also inserted into the guiding groove 4.3 to improve the reliability of the connection between the tail sleeve 6 and the mounting body 1.

[0049] As Figure 9 shown, in some other embodiments, a detachable dust cover 5 is sleeved on the ferrule 1.1 and the connecting seat 2. A placement groove 3.6 for the dust cover 5 to be inserted into is formed on the mounting body 1. A clamping tooth 3.7 for abutting against the dust cover 5 is formed on the connecting seat 2. When the dust cover 5 is sleeved on the connecting seat 2, the part of the bare optical fiber 1.2 extending out of the fiber protection channel 1.5 is placed in the dust cover. By using the dust cover 5, external dust and other impurities can be prevented from adhering to the bare optical fiber 1.2, thereby improving the splicing quality.

[0050] Among them, the clamping tooth 3.7 can not only improve the reliability of the connection with the dust cover 5, but also improve the reliability when cooperating with the heat shrink tube.

[0051] As Figures 1 to 9 shown, for a further explanation of the assembly method of the prefabricated end component of the fiber optic hot melt connector, it includes the following steps:

[0052] S0: Quantitative cutting: Select a bare optical fiber reel, and use a cutting device to cut the bare optical fiber reel into bare optical fibers 1.2 with a quantitative length.

[0053] S1: Assembly of the optical fiber connection part 4: Insert the bare optical fiber 1.2 onto the ferrule 1.1 to form the optical fiber connection part 4, and detect the length of the bare optical fiber 1.2 to ensure that the length of the bare optical fiber 1.2 is within the specified numerical range;

[0054] S2: Installation of the connection base 2: Insert the optical fiber connection part 4 onto the connection base 2, so that the ferrule 1.1 is inserted onto the connection base 2, and the bare optical fiber 1.2 passes through the connection base 2 and protrudes from the connection base 2. Then insert the connection base 2 with the optical fiber connection part 4 installed into the installation main body 1 to complete the preliminary installation of the connection base 2;

[0055] S3: Fixing of the connection base 2: Sleeve the elastic element 3.5 on the connection base 2, and snap the anti-rotation ring 3 onto the installation main body 1. The anti-rotation ring 3 abuts against the elastic element 3.5, so that the elastic element 3.5 abuts against the connection base 2, and the connection base 2 is fixed on the installation main body 1.

[0056] In addition, after step S3, there is also step S4: Installation of the dust cover 5. Clean the ferrule 1.1 and the bare optical fiber 1.2 exposed outside the connection base 2, and sleeve the dust cover 5 on the bottom of the ferrule 1.1 and the connection base 2, so that the bare optical fiber 1.2 is placed in the dust cover 5 to ensure the cleanliness of the surfaces of the bare optical fiber 1.2 and the ferrule 1.1, thereby improving the fusion splicing quality and the connection stability of the connector.

[0057] Further, a disassembly part 5.1 for hand holding is formed on the dust cover 5, and a cleaning piece 5.2 is arranged inside the dust cover 5. When disassembling, the hand squeezes the disassembly part 5.1, and the cleaning piece 5.2 will fit against the bare optical fiber 1.2 to clean the surface of the bare optical fiber 1.2, thereby improving the fusion splicing efficiency.

[0058] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. The prefabricated end component of an optical fiber fusion connector, characterized in that It includes an installation main body (1), a connection seat (2) inserted on the installation main body (1), and an anti-retreat ring (3) clamped on the installation main body (1). The anti-retreat ring (3) abuts against the connection seat (2) to prevent the connection seat (2) from detaching from the installation main body (1). The installation main body (1) is provided with an optical fiber connection part (4). The optical fiber connection part (4) includes an insert core (1.1) and a bare optical fiber (1.2) inserted on the insert core (1.1). The connection seat (2) includes a plug-in part (1.3) for installing the insert core (1.1) and a fiber protection part (1.4) for protecting the bare optical fiber (1.2). A fiber protection channel (1.5) is formed in the fiber protection part (1.4). The insert core (1.1) is inserted on the plug-in part (1.3), and the bare optical fiber (1.2) passes through the fiber protection channel (1.5) and extends out of the fiber protection channel (1.5) with a fixed length.

2. The prefabricated end component of the optical fiber fusion connector according to claim 1, wherein: The plug-in part (1.3) and the fiber protection part (1.4) are integrally formed.

3. The prefabricated end component of the optical fiber fusion connector according to claim 1, characterized in that: The length of the bare optical fiber (1.2) is X, the length of the bare optical fiber (1.2) placed in the fiber protection channel (1.5) is 0.45X - 0.48X, and the length of the bare optical fiber (1.2) extending out of the fiber protection channel (1.5) is 0.21X - 0.24X.

4. The prefabricated end component of the optical fiber fusion connector according to claim 1, characterized in that: The fiber protection channel (1.5) includes a guiding section (2.1), a limiting section (2.2), and a transition section (2.3) connecting the guiding section (2.1) and the limiting section (2.2). The diameter of the limiting section (2.2) is smaller than that of the guiding section (2.1). The diameter of the transition section (2.3) gradually decreases along the extending direction of the bare optical fiber (1.2) and forms a fiber guiding arc surface (2.4).

5. The prefabricated end component of the optical fiber fusion connector according to claim 1, characterized in that: The anti-retreat ring (3) is formed with a first clamping convex part (3.1). The installation main body (1) is formed with a first clamping groove (3.2) for the first clamping convex part (3.1) to be inserted into. And an elastic element (3.5) is arranged on the anti-retreat ring (3). One end of the elastic element (3.5) abuts against the anti-retreat ring (3), and the other end abuts against the connection seat (2) to prevent the connection seat (2) from detaching from the installation main body (1).

6. The prefabricated end component of the optical fiber fusion connector according to claim 1, wherein: A detachable dust-proof sleeve (5) is sleeved on the insert core (1.1) and the connection seat (2). The installation main body (1) is formed with a placement groove (3.6) for the dust-proof sleeve (5) to be inserted into. The connection seat (2) is formed with engaging teeth (3.7) abutting against the dust-proof sleeve (5). When the dust-proof sleeve (5) is sleeved on the connection seat (2), the part of the bare optical fiber (1.2) extending out of the fiber protection channel (1.5) is placed in the dust-proof sleeve (5).

7. The prefabricated end component of the optical fiber fusion connector according to claim 1, characterized in that: The installation main body (1) is formed with an anti-rotation groove (4.1), and the end of the connection seat (2) is inserted into the anti-rotation groove (4.1).

8. The prefabricated end component of the optical fiber fusion connector according to claim 1, characterized in that: The anti-retreat ring (3) is formed with a first guiding convex part (4.1). The installation main body (1) is formed with a guiding groove (4.3) for the first guiding convex part (4.1) to be inserted into.

9. An assembly method for a prefabricated end component of an optical fiber fusion connector, including the prefabricated end component according to any one of claims 1 to 8, characterized in that, It includes the following steps: S0: Quantitative cutting: Select a bare optical fiber coil and use a cutting device to cut the bare optical fiber coil into bare optical fibers (1.2) with a quantitative length. S1: Assembly of the optical fiber connection part (4): Insert the bare optical fiber (1.2) onto the ferrule (1.1) to form the optical fiber connection part (4); S2: Installation of the connection base (2): Insert the optical fiber connection part (4) onto the connection base (2), insert the ferrule (1.1) onto the connection base (2), and pass the bare optical fiber (1.2) through the connection base (2) and expose it outside the connection base (2). Then insert the connection base (2) with the installed optical fiber connection part (4) into the installation main body (1) to complete the preliminary installation of the connection base (2); S3: Fixing of the connection base (2): Sleeve the elastic element (3.5) on the connection base (2), and snap the anti-rotation ring (3) onto the installation main body (1). The anti-rotation ring (3) abuts against the elastic element (3.5), so that the elastic element (3.5) abuts against the connection base (2) to fix the connection base (2) on the installation main body (1).

10. The assembly method of the prefabricated end component of the optical fiber fusion connector according to claim 1, characterized in that: After step S3, there is also step S4: Installation of the dust cover (5). Clean the ferrule (1.1) and the bare optical fiber (1.2) exposed outside the connection base (2), and sleeve the dust cover (5) on the bottom of the ferrule (1.1) and the connection base (2) so that the bare optical fiber (1.2) is placed inside the dust cover (5).

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