A pre-connector, optical cable assembly and communication device

Abstract

This application provides a pre-connector, an optical cable assembly, and a communication device. The pre-connector includes a connector assembly and an outdoor assembly. The connector assembly includes a ferrule base and a ferrule that can slide relative to the ferrule base. The ferrule base is used to fix the optical cable, and the ferrule is used to connect with an optical fiber inserted into the ferrule base; thereby allowing the optical fiber to connect to the communication device through the ferrule. The outdoor assembly includes a spindle fitted and fixed to the ferrule base; and a handle sleeve fitted on the spindle. The outdoor assembly acts as a connector for a detachable and fixed connection to the communication device, providing a locking force when the communication device is connected. The pre-connector provided in this application, by using a ferrule base to directly connect to the optical cable and by making the handle sleeve and spindle modular, simplifies the assembly of the pre-connector by simply fitting the outdoor assembly onto the optical cable during assembly.

Description

[0001] This application is a divisional application. The original application has the application number 201911033413.9 and the original application date is October 28, 2019. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a pre-connector, optical cable assembly, and communication equipment. Background Technology

[0003] In the process of laying fiber optic cables for the drop section of an FTTH network, one method is fusion splicing. This involves distributing fiber optic connectors for each household within a distribution box, splicing these connectors to the drop cable using a fiber optic fusion splicer within the distribution box, and then laying the drop cable to each household. At the other end of the drop cable, another field splice is required to connect it to the user terminal box in each household. The drawbacks of this method are the need for specialized fiber optic fusion splicing equipment, high skill requirements for operators, and a lengthy laying process. This product, on the other hand, uses a field-fabricated connector to terminate the drop cable and connect it to the other end of the adapter for user access. The drop cable is then laid to each household. At the other end of the drop cable, a field connector is also installed to connect it to the user terminal box in each household. This approach eliminates the need for specialized equipment such as fusion splicers, and is simple and convenient to operate and terminate. Outdoor connectors are core components in fiber optic pre-connected products, generally requiring IP68 protection rating, vibration-proof and anti-loosening connection locking methods, and body materials suitable for outdoor environments. However, existing outdoor fiber optic connectors consist of multiple parts, making their assembly process relatively complex and difficult to assemble. Summary of the Invention

[0004] This application provides a pre-connector and a communication device to simplify the structure of the pre-connector and facilitate connection with the communication device.

[0005] Firstly, a pre-connector is provided for connecting an optical cable to a communication device. In configuration, the pre-connector includes a connector assembly and an outdoor assembly. The connector assembly includes a ferrule base and a ferrule slidably connected to the ferrule base and lockable in a set position. The ferrule base is used to fix the optical cable, and the ferrule is used for optical fiber connection with the optical cable inserted into the ferrule base. When connected to the communication device, the ferrule serves as the connecting end of the pre-connector and connects to the communication device. The outdoor assembly includes a main shaft fitted onto and fixedly connected to the ferrule base; and a handle sleeve fitted outside the main shaft. The outdoor assembly acts as a connector for detachable fixed connection to the communication device, providing locking force when connecting the communication device. As can be seen from the above description, the pre-connector provided in this application, by using a ferrule base to directly connect to the optical cable and by making the handle sleeve and main shaft modular, simplifies the assembly of the pre-connector by only needing to fit the outdoor assembly onto the optical cable during assembly.

[0006] In one specific implementation, the connector assembly further includes a clamping sleeve, which is fitted onto the connection between the optical cable and the ferrule base. A portion of the clamping sleeve is fixedly connected to the ferrule base, and another portion is fixedly connected to the optical cable. By fixing the clamping sleeve to both the optical cable and the ferrule base, the reliability of the connection between the optical cable and the ferrule base is improved.

[0007] In one specific implementation, the end of the ferrule base away from the ferrule is provided with a knurled structure that mates with the pressure sleeve. This improves the stability of the connection between the pressure sleeve and the optical cable.

[0008] In one specific implementation, the connector assembly further includes a frame sleeve fitted onto the ferrule; wherein the frame sleeve is fixedly connected to the ferrule base; and the ferrule portion is exposed outside the frame sleeve. The ferrule is protected by the frame sleeve.

[0009] In one specific implementation, a compression spring is fitted onto the ferrule, with one end of the spring pressing against the ferrule base and the other end pressing against the ferrule, thereby ensuring the connection between the ferrule and the communication equipment.

[0010] In one specific implementation, the handle sleeve and the spindle are sealed by an elastic sealing sleeve, improving the sealing effect of the pre-connector.

[0011] In one specific implementation, the outer side wall of the spindle is provided with a first protrusion, and the inner side wall of the handle sleeve is provided with a second protrusion, and the first protrusion and the second protrusion form a space to accommodate the elastic sealing sleeve; wherein, one end of the elastic sealing sleeve abuts against the first protrusion, and the other end abuts against the second protrusion. The elastic sealing sleeve is defined by the two protrusions.

[0012] When the pre-connector is assembled with the optical cable, the outdoor component is fitted onto the optical cable, and the ferrule base of the connector assembly is fixedly connected to the outer shell of the optical cable, and the ferrule is connected to the optical fiber;

[0013] The outdoor component is fitted onto the connector assembly by one end of the connector assembly facing away from the ferrule; and the main shaft is engaged and fixed with the ferrule base. This facilitates the connection between the connector assembly and the outdoor component.

[0014] In one specific implementation, the ferrule base is provided with a protrusion; the main shaft is provided with a slot that mates with the protrusion. The connector assembly is connected to the outdoor assembly through the engagement of the protrusion and the slot.

[0015] In one specific possible implementation, when the pre-connector is assembled with the optical cable...

[0016] The outdoor component is fitted onto the ferrule base by one end of the connector assembly near the ferrule, and the main shaft is engaged and fixed to the ferrule base. This facilitates the connection between the connector assembly and the outdoor component.

[0017] In one specific implementation, the ferrule base is provided with a locking point; the main shaft is provided with an elastic arm, and the elastic arm is provided with a slot for engaging and fixing with the locking point. The connector assembly is connected to the outdoor assembly through the cooperation of the locking point and the slot.

[0018] In one specific implementation, a traction component is also included. Before the outdoor component is engaged and secured with the connector assembly, the traction component is fitted onto the connector assembly and detachably and securely connected to the connector assembly for dragging the optical cable. This facilitates dragging the optical cable.

[0019] In one specific implementation, the ferrule base of the connector assembly is provided with external threads and an O-ring;

[0020] The traction assembly has an internal thread that mates with the external thread, and when the traction assembly is fitted onto the connector assembly, the traction assembly and the connector assembly are sealed together by the O-ring. This facilitates the connection between the traction assembly and the connector assembly.

[0021] In one specific implementation, a heat-shrink tubing is further included, with one portion fitted onto the optical cable and the other portion fitted onto the spindle, sealing the connection between the optical cable and the spindle. This improves the connection stability between the pre-connector and the optical cable.

[0022] In one specific implementation, a heat-shrinkable sheath is further included; part of the heat-shrinkable sheath is fitted onto the optical cable, and another part is fitted onto the spindle, sealing the connection between the optical cable and the spindle; wherein the heat-shrinkable sheath is fitted onto the outside of the heat-shrinkable tubing. This improves the connection stability between the pre-connector and the optical cable.

[0023] In one specific implementation, the system further includes a connecting cord fitted onto the handle sleeve and rotatable relative to the handle sleeve, and a dust cover connected to the connecting cord; wherein the dust cover is used to connect to the outdoor component and cover the exposed ferrule, thereby improving the safety of the ferrule.

[0024] Secondly, a communication device is provided, comprising an adapter and a pre-connector as described above, which is detachably and fixedly connected to the adapter. The pre-connector provided in this application embodiment connects directly to the optical cable using a ferrule base and has a modular structure for the handle sleeve and main shaft. When assembling the pre-connector, only the outdoor component needs to be fitted onto the optical cable, thus facilitating the assembly of the pre-connector. Attached Figure Description

[0025] Figure 1 An exploded view of the first type of pre-connector provided in the embodiments of this application;

[0026] Figure 2 A cross-sectional view of a connector assembly of a first type of pre-connector provided in an embodiment of this application;

[0027] Figure 3 A cross-sectional view of an outdoor component of a first type of pre-connector provided in an embodiment of this application;

[0028] Figure 4 A cross-sectional view of a first type of pre-connector provided in an embodiment of this application;

[0029] Figure 5 An exploded view of the second type of pre-connector provided in the embodiments of this application;

[0030] Figure 6 A cross-sectional view of a connector assembly for a second type of pre-connector provided in an embodiment of this application;

[0031] Figure 7 A cross-sectional view of the outdoor component of the second type of pre-connector provided in an embodiment of this application;

[0032] Figure 8 A cross-sectional view of a second type of pre-connector provided in an embodiment of this application;

[0033] Figure 9 This is a schematic diagram of the structure of a second type of pre-connector provided in an embodiment of this application. Detailed Implementation

[0034] To facilitate understanding of the pre-connector provided in this application embodiment, its application scenario is first explained. The pre-connector provided in this application embodiment is used to connect optical cables and communication equipment. The communication equipment can be placed indoors or outdoors, and is not limited here. When connecting the communication equipment and the optical cable, the pre-connector is first assembled with the optical cable, and then connected to the socket of the communication equipment through the pre-connector, thereby realizing the connection between the optical cable and the communication equipment.

[0035] First refer to Figure 1 , Figure 1 This illustration shows an exploded view of a pre-connector provided in an embodiment of this application. Figure 1 As can be seen, the main components of the pre-connector provided in this application embodiment include a connector assembly 120 and an outdoor assembly 130. The connector assembly 120 is used to realize the connection between the communication equipment and the optical cable 126, while the outdoor assembly 130 acts as a connector to detachably and fixably connect with the communication equipment and provides locking force when connected to the communication equipment. Of course, the pre-connector also includes other accessories, such as a dust cover 110, a sleeve 140, or a heat shrink sleeve 150. The dust cover 110, sleeve 140, and heat shrink sleeve 150 can be used as accessories in the pre-connector and can be set as needed during use. The two main components of the pre-connector provided in this application embodiment will be described below.

[0036] Please refer to the above. Figure 2 , Figure 2 This application illustrates a connector assembly 120 for a pre-connector, which is a modular assembly for connecting the pre-connector to the optical cable 126. It consists of multiple parts, as shown in the illustration. Figure 2 The figure shows a cross-sectional view of the connector assembly 120. Figure 2 As shown, the connector assembly 120 includes a ferrule 122 for connection to the optical cable 126. When the pre-connector is assembled onto the optical cable 126, the ferrule 122 is fixedly connected to the optical fiber in the optical cable 126, and the ferrule 122 conducts signals through the optical fiber. When the pre-connector is connected to a communication device, the ferrule 122 serves as the connection end of the pre-connector and connects to the socket of the communication device, thus realizing the connection between the optical cable 126 and the communication device. (Continue to refer to...) Figure 2The connector assembly 120 also includes a ferrule base 124, which defines the ferrule 122 and the optical cable 126. Specifically, the ferrule base 124 has a hollow structure with a through cavity inside. The ferrule 122 and the optical cable 126 are located at opposite ends of the cavity. For ease of description, the two opposite ends of the ferrule base 124 are named the first end and the second end, respectively. The end of the ferrule base 124 that mates with the ferrule 122 is the first end, and the end of the ferrule base 124 that mates with the optical cable 126 is the second end.

[0037] During the assembly of the optical cable 126 and the ferrule base 124, a portion of the outer shell of the optical cable 126 is stripped away, exposing the internal optical fiber. The optical fiber is then inserted into the cavity; this portion of the optical fiber is used for connection with the ferrule 122. The shelled portion of the optical cable 126 is fixedly connected to the ferrule base 124 via a compression sleeve 125. (Continue to refer to...) Figure 2 A compression sleeve 125 is fitted onto the connection between the optical cable 126 and the ferrule base 124, with one part of the compression sleeve 125 fixedly connected to the ferrule base 124 and the other part fixedly connected to the optical cable 126. This secures the optical cable 126 and the ferrule base 124 relative to each other. To enhance the stability of the connection between the compression sleeve 125 and the ferrule base 124, a knurled structure 1242 is provided at the second end of the ferrule base 124. When the compression sleeve 125 is fitted onto the ferrule base 124, the knurled structure 1242 cooperates with the compression sleeve 125 to enhance the friction between the compression sleeve 125 and the ferrule base 124, thereby enhancing the connection stability between the optical cable 126 and the ferrule base 124. When the aforementioned pressure sleeve 125 is engaged with the ferrule base 124 and the optical cable 126, the deformation of the pressure sleeve 125 ensures an interference fit between the pressure sleeve 125 and the ferrule base 124 and the optical cable 126, thereby guaranteeing a reliable connection between the optical cable 126 and the ferrule base 124. For example, the pressure sleeve 125 can be a plastic sleeve, an elastic plastic sleeve, or other deformable structures.

[0038] Furthermore, it should be understood that the above Figure 2 This is merely a specific example of the fixed connection between the optical cable 126 and the ferrule base 124. The fixed connection methods between the optical cable 126 and the ferrule base 124 in the pre-connector provided in this application embodiment are not limited to... Figure 2 Alternatively, other methods can be used to connect the optical cable 126 to the ferrule base 124, such as by using clamps, tape, or other components that can achieve a fixed connection.

[0039] Continue to refer to Figure 2When the socket 122 is used with the communication equipment, the socket 122 needs a certain sliding allowance to ensure a good fit with the socket of the communication equipment. Therefore, when setting the socket 122, a sliding connection between the socket 122 and the base is adopted. Figure 2 As shown, the ferrule 122 is inserted into the cavity from the first end of the ferrule base 124, and one end of the ferrule 122 inserted into the cavity is connected to the optical fiber inserted into the cavity. The other end of the ferrule 122 is exposed outside the ferrule base 124 for connection to a socket of a communication device.

[0040] When specifically implementing the sliding connection between the ferrule 122 and the ferrule base 124, such as Figure 2 As shown, the connector assembly 120 also includes a frame sleeve 121, which is a hollow cylindrical structure and is fixedly connected to the ferrule base 124, such as by snap-fit. Of course, the frame sleeve 121 can also be fixedly connected to the ferrule base 124 by other fixed connection methods.

[0041] After the frame sleeve 121 is fixedly connected to the ferrule base 124, the frame sleeve 121 is fitted onto the ferrule 122, and the frame sleeve 121 and the ferrule base 124 together limit the sliding range of the ferrule 122. (Continue to refer to...) Figure 2 The hollow interior of the frame sleeve 121 is provided with a first shoulder, and the hollow interior of the ferrule base 124 is also provided with a second shoulder. When the frame sleeve 121 is assembled onto the ferrule base 124, the first shoulder and the second shoulder face each other, forming a spatial area. When the ferrule 122 is installed, it has a third shoulder located within the spatial area defined by the first shoulder and the second shoulder. A compression spring 123 is fitted onto the ferrule 122. One end of the compression spring 123 presses against the ferrule base 124 (specifically against the second shoulder), and the other end presses against the ferrule 122 (specifically against the third shoulder). The compression spring 123 is used to push the third shoulder against the first shoulder, and when the third shoulder presses against the first shoulder, as... Figure 2 As shown, the insert 122 is partially exposed outside the frame 121. In use, when the insert 122 is inserted into the socket, the insert 122 slides toward the insert base 124, the compression spring 123 is compressed, and the deformation force of the compression spring 123 pushes the insert 122 into the socket.

[0042] Continue to refer to Figure 2 When the connector assembly 120 provided in this embodiment mates with the outdoor assembly 130, it is connected to the outdoor assembly 130 through the ferrule base 124. When setting the ferrule base 124, refer to... Figure 1The socket base 124 is cylindrical in shape, and a fourth shoulder is provided in the middle of the socket base 124, so that the socket base 124 has a structure that is thick in the middle and thin at both ends. Furthermore, a protrusion 1241 for engaging with the outdoor component 130 is provided on the fourth shoulder.

[0043] Please refer to the above. Figure 3 and Figure 4 ,in Figure 3 A cross-sectional view of the outdoor component 130 provided in an embodiment of this application is shown. Figure 4 An assembly diagram of connector assembly 120 and outdoor assembly 130 is shown. First refer to... Figure 3 The outdoor component 130 provided in this embodiment serves as a fixed connection between the connector assembly 120 and the communication device. Its main structure includes a spindle 132 and a handle sleeve 131. The following describes the process in conjunction with... Figure 3 and Figure 4 Let me explain the structure of the outdoor component 130 in detail.

[0044] Please refer to the above. Figure 1 and Figure 3 The outdoor component 130 provided in this embodiment mainly includes two parts: a main shaft 132 and a handle sleeve 131. The main shaft 132 is a columnar structure with a hollow chamber inside, the shape of which matches the external structural features of the insert base 124. Figure 3 The placement direction of the outdoor component 130 is the reference direction. The chambers of the main shaft 132, from left to right, are: a second chamber and a first chamber. The first chamber is used to fit onto the end of the ferrule base 124 that connects to the optical cable 126, and the second chamber is used to fit onto the fourth shoulder on the ferrule base 124. Furthermore, a slot 1321 structure that mates with the protrusion of the ferrule base 124 is provided in the second chamber. When the outdoor component 130 is assembled onto the connector assembly 120, the outdoor component 130 is fitted onto the optical cable 126, and the ferrule base 124 of the connector assembly 120 is fixedly connected to the outer shell of the optical cable 126, with the ferrule 122 connected to the optical fiber. The outdoor component 130 is fitted onto the connector assembly 120 from the end opposite to the ferrule 122, and the spindle 132 is engaged and fixed with the ferrule base 124. Specifically, the spindle 132 and the ferrule base 124 can be fixedly connected together through the cooperation of the slot 1321 and the protrusion 1241. Of course, the cooperation of the protrusion 1241 and the slot 1321 is only a specific example, and other engagement and fixing methods can also be used in this embodiment.

[0045] Continue to refer to Figure 3 The outdoor component 130 provided in this embodiment also includes a handle sleeve 131, which is used for detachable connection to a socket of a communication device. Figure 3 As shown, the handle sleeve 131 also adopts a hollow cylindrical structure, and the handle sleeve 131 is fitted onto the main shaft 132 and can be rotatably connected to the main shaft 132.

[0046] Continue to refer to Figure 3 The handle sleeve 131 is used to connect to the socket during use. Therefore, when the handle sleeve 131 is set, it has a receiving cavity to accommodate the socket. When the pre-connector is assembled into the socket of the communication equipment, the spindle 132 is inserted into the socket, and the handle sleeve 131 is fitted onto the outside of the socket, thereby clamping the side wall of the socket between the spindle 132 and the handle sleeve 131, and the ferrule 122 of the pre-connector is also connected to the socket.

[0047] To protect the optical cable 126 during assembly, a sealed connection is used between the spindle 132 and the handle sleeve 131 to enhance protection for the optical cable 126. During setup, such as... Figure 3 As shown, the outer wall of the spindle 132 is provided with a first protrusion, and the inner wall of the corresponding handle sleeve 131 is provided with a second protrusion. When the handle sleeve 131 is fitted onto the spindle 132, the first and second protrusions form a receiving space, which is used to accommodate the elastic sealing sleeve 133. Figure 3 As shown, the elastic sealing sleeve 133 is fitted onto the end of the spindle 132 away from the insert 122, and one end of the elastic sealing sleeve 133 presses against the first protrusion. When the handle sleeve 131 is fitted onto the spindle 132, the second protrusion of the handle sleeve 131 presses against the other end of the elastic sealing sleeve 133, thereby confining the elastic sealing sleeve 133 within the receiving space defined by the first protrusion and the second protrusion.

[0048] Depend on Figure 3 As can be seen, the elastic sealing sleeve 133 has a certain length along the axial direction of the main shaft 132. Therefore, in addition to sealing the handle sleeve 131 and the main shaft 132, the elastic sealing sleeve 133 can also provide a clamping force for the connection between the handle sleeve 131 and the socket. When the handle sleeve 131 is in contact with the socket, the handle sleeve 131 will slide relative to the main shaft 132, and the elastic sealing sleeve 133 will be compressed. When the deformation force of the elastic sealing sleeve 133 is applied to the handle sleeve 131, the deformation force will push the handle sleeve 131 away from the socket, thus acting as a locking force to ensure a stable connection between the handle sleeve 131 and the socket.

[0049] Continue to refer to Figure 1 and Figure 3 The handle sleeve 131 provided in this embodiment of the application is also provided with a connecting rope 134, such as... Figure 3As shown, the connecting rope 134 is fitted onto the handle sleeve 131 and can rotate relative to the handle sleeve 131. During connection, the handle sleeve 131 has a slot 1321, and one end of the connecting rope 134 is fitted into this slot 1321 and can rotate within it. The other end of the connecting rope 134 is connected to a dust cover 110, which is used to connect to the outdoor component 130 and cover the exposed insert 122 to provide protection for the insert 122. When the pre-connector is not in use, this is to prevent dust from entering the spindle 132. Figure 4 As shown, Figure 4 A cross-sectional view of the pre-connector is shown; in Figure 4 The image shows the mating configuration of the dust cover and the outdoor component 130. Figure 4 The dust cover 110 shown includes a cap body, which is the main structure of the dust cover. When connected to the outdoor component 130, it is... Figure 4 As can be seen, the cap body is inserted into the receiving cavity of the handle sleeve 131 for mating with the socket, and a sealing gasket 112 is provided on the side wall of the cap body. When the cap body is inserted into the receiving cavity, the sealing gasket presses against the inner side wall of the handle sleeve 131, thereby sealing the cap body and the handle sleeve 131. In addition, a connecting end 111 is provided at one end of the cap body. This connecting end 111 is used to connect to the connecting rope 134. The dust cover 110 is connected to the outdoor component 130 through the connecting rope 134. When the dust cover 110 is removed from the receiving cavity, the dust cover 110 can be connected to the outdoor component 130 through the connecting rope 134 to prevent the dust cover 110 from being lost.

[0050] Continue to refer to Figure 1 and Figure 4 The pre-connector provided in this application embodiment may further include a sleeve 140, wherein the sleeve 140 and the dust cover 110 are optional components of the pre-connector and can be configured as needed during installation. The sleeve 140 is used to connect the optical cable 126 and the spindle 132, such as... Figure 1 As shown, the sleeve 140 is a cylindrical structure that passes through the optical cable 126. During assembly, the sleeve 140 is partially fitted onto the optical cable 126 and partially fitted onto the spindle 132, thus connecting the spindle 132 and the optical cable 126 together. The sleeve 140 is a heat-shrinkable sleeve made of an elastic material, such as plastic. When the sleeve 140 is fitted onto the optical cable 126 and the spindle 132, the elastic deformation of the sleeve 140 can fix the optical cable 126 and the spindle 132 together, and also seal the connection between the optical cable 126 and the spindle 132. (Continue to refer to...) Figure 1The heat-shrinkable sleeve 150 also adopts a cylindrical structure, and its function is similar to that of the sleeve 140, providing double-layer protection. During assembly, the heat-shrinkable sleeve 150 is also fitted onto the optical cable 126, and part of the heat-shrinkable sleeve 150 is fitted onto the spindle 132 and fixedly connected to it. Figure 4 As shown, when the heat shrink sleeve 150 is fitted onto the optical cable 126 and the spindle 132, the heat shrink sleeve 150 is fitted outside the sleeve 140. The portion of the heat shrink sleeve 150 fitted onto the optical cable 126 is fitted onto the sleeve 140 and fixedly connected to the sleeve 140, while the portion of the heat shrink sleeve 150 fitted onto the spindle 132 is directly fixedly connected to the spindle 132, sealing the connection between the optical cable 126 and the spindle 132. Thus, the sleeve 140 and the heat shrink sleeve 150 achieve a fixed connection and seal between the spindle 132 and the optical cable 126, achieving dustproof and waterproof effects.

[0051] Please refer to the above. Figure 1 and Figure 4 When assembling the pre-connector provided in this embodiment with the optical cable 126, the heat shrink tail sheath 150 is first fitted onto the optical cable 126, then the sleeve 140 is fitted onto the optical cable 126, then the outdoor component 130 is fitted onto the optical cable 126, and finally the connector assembly 120 is connected to the optical cable 126. After the connector assembly 120 is fixedly connected to the optical cable 126 and the optical fiber of the optical cable 126, the spindle 132 is fitted onto the ferrule base 124 from the side opposite to the ferrule 122 and fixedly connected to the spindle 132; then the sleeve 140 is fixed to the spindle 132, and then the heat shrink tail sheath 150 is fixed to the spindle 132, thereby completing the fixed connection between the pre-connector and the optical cable 126. As can be seen from the above description, the pre-connector assembly 120 provided in this application adopts a modular design concept, modularly separating the connector assembly 120 and the outdoor assembly 130, and connecting them by a snap-fit ​​method. Specifically, this involves the engagement of the protrusion and the slot 1321 between the spindle 132 and the ferrule base 124, thereby simplifying the assembly process of the pre-connector and the optical cable 126 and improving assembly efficiency and process reliability. Furthermore, the multiple sealing gaskets provide IP68 protection for the optical cable 126.

[0052] First refer to Figure 5 , Figure 5 This illustration shows an exploded view of a pre-connector provided in an embodiment of this application. Figure 5As can be seen, the main components of the pre-connector provided in this application embodiment include a connector assembly 220 and an outdoor assembly 210. The connector assembly 220 is used to realize the connection between the communication device and the optical cable 2201, while the outdoor assembly 210 acts as a connector to detachably and securely connect with the communication device and provides locking force when connected to the communication device. The pre-connector also includes other accessories, such as a sleeve 230 or a heat-shrinkable sheath 240. The sleeve 230 and the heat-shrinkable sheath 240 can be used as accessories in the pre-connector and can be configured as needed during use. The two main components of the pre-connector provided in this application embodiment will be described below.

[0053] Please refer to the above. Figure 6 , Figure 6 This application illustrates a connector assembly 220 for a pre-connector, which is a modular assembly for connecting the pre-connector to the optical cable 2201. It consists of multiple parts, as shown in the illustration. Figure 6 The figure shows a cross-sectional view of connector assembly 220. Figure 6 As shown, connector assembly 220 includes a ferrule 223 for connection to optical cable 2201. When the pre-connector is assembled onto optical cable 2201, ferrule 223 is fixedly connected to the optical fiber in optical cable 2201, and signal conduction occurs between ferrule 223 and the optical fiber. When the pre-connector is connected to communication equipment, ferrule 223 serves as the connection end of the pre-connector and connects to the socket of the communication equipment, thus establishing the connection between optical cable 2201 and the communication equipment. (Continue to refer to...) Figure 6 The connector assembly 220 also includes a ferrule base 225, which defines the ferrule 223 and the optical cable 2201. Specifically, the ferrule base 225 has a hollow structure with a through cavity inside. The ferrule 223 and the optical cable 2201 are located at opposite ends of the cavity. For ease of description, the two opposite ends of the ferrule base 225 are named the first end and the second end, respectively. The end of the ferrule base 225 that mates with the ferrule 223 is the first end, and the end of the ferrule base 225 that mates with the optical cable 2201 is the second end.

[0054] During the assembly of optical cable 2201 and ferrule base 225, a portion of the outer shell of optical cable 2201 is stripped away, exposing the internal optical fiber. A potting sleeve 229 is fitted between the exposed optical fiber and the outer shell. The optical fiber is then inserted into the cavity; this portion of the optical fiber is used for connection with ferrule 223. The shelled portion of optical cable 2201 is fixedly connected to ferrule base 225 via a crimp sleeve 227. (Continue to refer to...) Figure 6A compression sleeve 227 is fitted onto the connection between the optical cable 2201 and the ferrule base 225, with one part of the compression sleeve 227 fixedly connected to the ferrule base 225 and the other part fixedly connected to the optical cable 2201. This clamping sleeve 227 thus relatively fixes the optical cable 2201 and the ferrule base 225. To enhance the stability of the connection between the compression sleeve 227 and the ferrule base 225, a knurled structure 2253 is provided at the second end of the ferrule base 225. When the compression sleeve 227 is fitted onto the ferrule base 225, the knurled structure 2253 cooperates with the compression sleeve 227 to enhance the friction between the compression sleeve 227 and the ferrule base 225, thereby enhancing the connection stability between the optical cable 2201 and the ferrule base 225. When the aforementioned compression sleeve 227 mates with the ferrule base 225 and the optical cable 2201, the deformation of the compression sleeve 227 ensures an interference fit between the compression sleeve 227 and both the ferrule base 225 and the optical cable 2201, guaranteeing a reliable connection between the optical cable 2201 and the ferrule base 225. The compression sleeve 227 can be made of a plastic sleeve, an elastic plastic sleeve, or other deformable structures. Furthermore, to further improve the connection stability between the ferrule base 225 and the optical cable 2201, a heat-shrink tubing 228 is also fitted onto the outside of the compression sleeve 227. Figure 6 As shown, the heat shrink tubing 228 is fitted onto the outside of the pressure sleeve 227, and one end of the heat shrink tubing 228 is fixedly connected to the ferrule base 225, while the other end is fixedly connected to the optical cable 2201. This allows the ferrule base 225 to be fixed to the optical cable 2201 through two layers of structure (pressure sleeve 227 and heat shrink tubing 228) when connected to the optical cable 2201, thereby enhancing the reliability of the connection between the ferrule base 225 and the optical cable 2201.

[0055] Furthermore, it should be understood that the above Figure 6 This is merely a specific example of the fixed connection between the optical cable 2201 and the ferrule base 225. The fixed connection methods between the optical cable 2201 and the ferrule base 225 in the pre-connector provided in this application embodiment are not limited to... Figure 6 Alternatively, other methods can be used to connect the optical cable 2201 to the ferrule base 225, such as by using clamps, tape, or other components that can achieve a fixed connection.

[0056] Continue to refer to Figure 6 When the ferrule 223 is used in conjunction with the communication equipment, the ferrule 223 needs a certain sliding allowance to ensure a good fit with the socket of the communication equipment. Therefore, when setting up the ferrule 223, a sliding connection between the ferrule 223 and the base is adopted. Figure 6As shown, ferrule 223 is inserted into the cavity from the first end of ferrule base 225, and one end of ferrule 223 inserted into the cavity is connected to the optical fiber inserted into the cavity. The other end of ferrule 223 is exposed outside the ferrule base 225 for connection to a socket of a communication device.

[0057] When specifically implementing the sliding connection between the ferrule 223 and the ferrule base 225, such as Figure 6 As shown, the connector assembly 220 also includes a frame sleeve 222, which is a hollow cylindrical structure. The frame sleeve 222 is fixedly connected to the ferrule base 225, such as by a snap-fit ​​mechanism. Of course, the frame sleeve 222 can also be fixedly connected to the ferrule base 225 by other methods.

[0058] After the frame sleeve 222 is fixedly connected to the ferrule base 225, the frame sleeve 222 is fitted onto the ferrule 223, and the frame sleeve 222 and the ferrule base 225 together limit the sliding range of the ferrule 223. (Continue to refer to...) Figure 6 The hollow interior of the frame sleeve 222 is provided with a first shoulder, and the hollow interior of the ferrule base 225 is also provided with a second shoulder. When the frame sleeve 222 is assembled onto the ferrule base 225, the first shoulder and the second shoulder face each other, forming a spatial area. When the ferrule 223 is installed, it has a third shoulder located within the spatial area defined by the first shoulder and the second shoulder. A compression spring 224 is fitted onto the ferrule 223. One end of the compression spring 224 presses against the ferrule base 225 (specifically against the second shoulder), and the other end presses against the ferrule 223 (specifically against the third shoulder). The compression spring 224 is used to push the third shoulder against the first shoulder, and when the third shoulder presses against the first shoulder, as... Figure 6 As shown, the plug 223 is partially exposed outside the frame 222. In use, when the plug 223 is inserted into the socket, the plug 223 slides toward the plug base 225, the compression spring 224 is compressed, and the deformation force of the compression spring 224 pushes the plug 223 into the socket.

[0059] Continue to refer to Figure 6 When the connector is assembled onto the ferrule base 225, to protect the exposed end of the ferrule 223, the connector assembly 220 provided in this embodiment is also provided with a dust cap 221. The dust cap 221 covers the end of the ferrule 223 and is inserted into the frame sleeve 222 for fixation. When the pre-connector is in use, the dust cap 221 can be pulled out of the frame sleeve 222, thereby exposing the ferrule 223; when the pre-connector is not in use, the dust cap 221 can be closed onto the ferrule 223 to prevent dust from contaminating the ferrule 223.

[0060] Continue to refer to Figure 6 When the connector assembly 220 provided in this embodiment mates with the outdoor assembly 210, it is connected to the outdoor assembly 210 through a ferrule base 225. When setting the ferrule base 225, refer to... Figure 5 The ferrule base 225 is cylindrical in shape, with a fourth shoulder located in the middle, creating a structure that is thicker in the middle and thinner at both ends. An O-ring 226 is fitted onto the fourth shoulder, sealing the outdoor component 210 to the ferrule base 225 when it is fitted onto the outdoor component 210. Furthermore, a stepped structure is formed between the fourth shoulder and the tail end of the ferrule base 225 (the end closest to the optical cable 2201). This stepped structure serves as a locking point 2252 for engaging with the outdoor component 210. Additionally, a groove 2251 is provided at the end of the fourth shoulder near the ferrule 223, which can also be used for engaging with the outdoor component 210. Figure 7 As can be seen, the outdoor component 2210 can be fixed on the ferrule base 225 by engaging with the outdoor component 210 at the opposite ends of the fourth shoulder through the locking point 2252 and the groove 2251.

[0061] Please refer to the above. Figure 7 and Figure 8 ,in Figure 7 A cross-sectional view of the outdoor component 210 provided in an embodiment of this application is shown. Figure 8 An assembly diagram of connector assembly 220 and outdoor assembly 210 is shown. First refer to... Figure 7 The outdoor component 210 provided in this embodiment serves as a fixed connection between the connector component 220 and the communication device. Its main structure includes a spindle 212 and a handle sleeve 211. The following describes the process in conjunction with... Figure 7 and Figure 8 The structure of the outdoor component 210 will be explained in detail.

[0062] Please refer to the above. Figure 5 and Figure 7 The outdoor component 210 provided in this embodiment mainly includes two parts: a main shaft 212 and a handle sleeve 211. The main shaft 212 is a cylindrical structure with a hollow chamber inside, the shape of which matches the external structural features of the insert base 225. Figure 7The placement direction of the spindle 212 is the reference direction. The chambers of the spindle 212, from left to right, are: a third chamber, a second chamber, and a first chamber. The first chamber is used to fit onto the end of the ferrule base 225 connected to the optical cable 2201. The second chamber is used to fit onto the fourth shoulder on the ferrule base 225. The third chamber is used to fit onto the end of the ferrule base 225 near the ferrule 223. Furthermore, the third chamber is provided with an elastic arm 2122 that engages with the locking point 2252 of the ferrule base 225. The elastic arm 2122 has a locking groove that engages and fixes with the locking point 2252. The end of the second chamber near the first chamber has a protrusion 2121 that engages with the groove 2251 of the ferrule base 225. When the outdoor component 210 is assembled onto the connector assembly 220, the outdoor component 210 is fitted onto the ferrule base 225 from the end of the connector assembly 220 closest to the ferrule 223, and the spindle 212 is engaged and fixed with the ferrule base 225. Specifically, the protrusion 2121 is inserted into the groove 2251, and the elastic arm 2122 engages with the locking point 2252 to fix the outdoor component 210 and the ferrule base 225 together. After assembly, the O-ring 226 of the ferrule base 225 seals the gap between the spindle 212 and the ferrule base 225.

[0063] Continue to refer to Figure 7 The outdoor component 210 provided in this application embodiment also includes a handle sleeve 211, which is used for detachable connection to a socket of a communication device. Figure 7 As shown, the handle sleeve 211 also adopts a hollow cylindrical structure, and the handle sleeve 211 is fitted onto the main shaft 212 and can be rotatably connected to the main shaft 212.

[0064] Continue to refer to Figure 7 The handle sleeve 211 is used to connect to the socket during use. Therefore, when the handle sleeve 211 is set, it specifically has a receiving cavity to accommodate the socket. When the pre-connector is assembled into the socket of the communication equipment, the spindle 212 is inserted into the socket, and the handle sleeve 211 is fitted onto the outside of the socket, thereby clamping the side wall of the socket between the spindle 212 and the handle sleeve 211, and the ferrule 223 of the pre-connector is also connected to the socket.

[0065] To protect the optical cable 2201 during assembly, a sealed connection is used between the spindle 212 and the handle sleeve 211 to enhance protection for the optical cable 2201. During setup, such as... Figure 7 As shown, the outer wall of the spindle 212 is provided with a first protrusion, and the inner wall of the corresponding handle sleeve 211 is provided with a second protrusion. When the handle sleeve 211 is fitted onto the spindle 212, the first and second protrusions form a receiving space, which is used to accommodate the elastic sealing sleeve 213. Figure 7As shown, the elastic sealing sleeve 213 is fitted onto the end of the spindle 212 away from the insert 223, and one end of the elastic sealing sleeve 213 presses against the first protrusion. When the handle sleeve 211 is fitted onto the spindle 212, the second protrusion of the handle sleeve 211 presses against the other end of the elastic sealing sleeve 213, thereby confining the elastic sealing sleeve 213 within the receiving space defined by the first protrusion and the second protrusion.

[0066] Depend on Figure 7 As can be seen, the elastic sealing sleeve 213 has a certain length along the axial direction of the main shaft 212. Therefore, in addition to sealing the handle sleeve 211 and the main shaft 212, the elastic sealing sleeve 213 can also provide a clamping force for the connection between the handle sleeve 211 and the socket. When the handle sleeve 211 is connected to the socket, the handle sleeve 211 will slide relative to the main shaft 212, and at the same time, the elastic sealing sleeve 213 is compressed. When the deformation force of the elastic sealing sleeve 213 is applied to the handle sleeve 211, the deformation force will push the handle sleeve 211 away from the socket, thus acting as a locking force to ensure a stable connection between the handle sleeve 211 and the socket.

[0067] Continue to refer to Figure 5 and Figure 7 The handle sleeve 211 provided in this embodiment of the application is also provided with a connecting rope 214, such as... Figure 7 As shown, the connecting rope 214 is fitted onto the handle sleeve 211 and can rotate relative to the handle sleeve 211. During connection, the handle sleeve 211 has a locking point 2252, and one end of the connecting rope 214 is fitted into this locking point 2252 and can rotate within it. The other end of the connecting rope 214 is connected to a dust cover 215, which is used to connect to the outdoor component 210 and cover the exposed insert 223 to provide protection for the insert 223. When the pre-connector is not in use, this is to prevent dust from entering the spindle 212. Figure 8 As shown, Figure 8 A cross-sectional view of the pre-connector is shown; in Figure 8 The image shows the mating configuration of the dust cover 215 and the outdoor component 210. Figure 8 The dust cover 215 shown includes a cap body, which is the main structure of the dust cover 215. When connected to the outdoor component 210, it is... Figure 8As can be seen, the cap body is inserted into the receiving cavity of the handle sleeve 211 for mating with the socket, and a sealing gasket 216 is provided on the side wall of the cap body. When the cap body is inserted into the receiving cavity, the sealing gasket 216 presses against the inner side wall of the handle sleeve 211, thereby sealing the cap body and the handle sleeve 211. In addition, a connecting end is provided at one end of the cap body, which is used to connect to the connecting rope 214. The dust cover 215 is connected to the outdoor component 210 through the connecting rope 214. When the dust cover 215 is removed from the receiving cavity, the dust cover 215 can be connected to the outdoor component 210 through the connecting rope 214 to prevent the dust cover 215 from being lost.

[0068] Continue to refer to Figure 5 and Figure 8 The pre-connector provided in this embodiment may further include a sleeve 230 and a dust cover 215, wherein the sleeve 230 and the dust cover 215 are optional components of the pre-connector and can be configured as needed during installation. The sleeve 230 is used to connect the optical cable 2201 and the spindle 212, such as... Figure 5 As shown, the sleeve 230 is a cylindrical structure that passes through the optical cable 2201. During assembly, the sleeve 230 is partially fitted onto the optical cable 2201 and partially fitted onto the spindle 212, thus connecting the spindle 212 and the optical cable 2201 together and sealing the connection between them. The sleeve 140 is a heat-shrink tubing made of an elastic material, such as plastic. When the sleeve 230 is fitted onto the optical cable 2201 and the spindle 212, its elastic deformation can fix the optical cable 2201 and the spindle 212 together, and it also provides a certain degree of sealing. (Continue to refer to...) Figure 5 The heat-shrinkable sleeve 240 also adopts a cylindrical structure, and its function is similar to that of the sleeve 230, providing double-layer protection. During assembly, the heat-shrinkable sleeve 240 is also fitted onto the optical cable 2201, and part of the heat-shrinkable sleeve 240 is fitted onto and fixedly connected to the spindle 212, sealing the connection between the optical cable 2201 and the spindle 212. Figure 8 As shown, when the heat shrink sleeve 240 is fitted onto the optical cable 2201 and the spindle 212, the heat shrink sleeve 240 is nested outside the sleeve 230. The portion of the heat shrink sleeve 240 fitted onto the optical cable 2201 is fitted onto the sleeve 230 and fixedly connected to the sleeve 230, while the portion of the heat shrink sleeve 240 fitted onto the spindle 212 is directly fixedly connected to the spindle 212. Thus, the sleeve and the heat shrink sleeve 240 achieve a fixed connection and seal between the spindle 212 and the optical cable 2201, achieving dustproof and waterproof effects.

[0069] Please refer to the above. Figure 5 and Figure 8When the pre-connector provided in this embodiment is assembled with the optical cable 2201, the heat shrink tail sheath 240 is first fitted onto the optical cable 2201, then the sleeve 230 is fitted onto the optical cable 2201, then the outdoor component 210 is fitted onto the optical cable 2201, and finally the connector assembly 220 is connected to the optical cable 2201. After the connector assembly 220 is fixedly connected to the optical cable 2201 and the optical fiber of the optical cable 2201, the spindle 212 is fitted onto the ferrule base 225 from the side opposite to the ferrule 223 and fixedly connected to the spindle 212; then the sleeve 230 is fixed to the spindle 212, and then the heat shrink tail sheath 240 is fixed to the spindle 212, thereby completing the fixed connection between the pre-connector and the optical cable 2201. As can be seen from the above description, the pre-connector assembly 220 provided in this application adopts a modular design concept, modularly separating the connector assembly 220 and the outdoor assembly 210, and connecting them by a snap-fit ​​method. Specifically, this involves the engagement of the protrusion and locking point 2252 between the main shaft 212 and the ferrule base 225, thereby simplifying the assembly process of the pre-connector and the optical cable 2201 and improving assembly efficiency and process reliability. Furthermore, the multiple sealing gaskets provide IP68 protection for the optical cable 2201.

[0070] like Figure 9 As shown, Figure 9 This illustration shows another state diagram of the pre-connector provided in an embodiment of this application. The pre-connector also includes a traction component. Before the outdoor component 210 and connector component 220 are engaged and fixed, the traction component is fitted onto the connector component 220 and detachably fixedly connected to it, and is used to pull the optical cable 2201. Before the optical cable 2201 is connected to the communication equipment, the traction component is pulled to move the optical cable 2201. In a specific connection, the ferrule base 225 of the connector component 220 is also provided with an external thread 2254 and an O-ring 226; the traction component is provided with an internal thread that mates with the external thread 2254, and when the traction component is fitted onto the connector component 220, the traction component and the connector component 220 are sealed together by the O-ring.

[0071] Continue to refer to Figure 9The traction assembly provided in this application includes a first traction housing 320 and a second traction housing 330 fixedly connected to the first traction housing 320. The second traction housing 330 is detachably fixedly connected to the insert base 225. During connection, the fourth shoulder of the insert base 225 has an external thread 2254, and the second traction housing 330 has an internal thread. During assembly, the second traction housing 330 is screwed onto the fourth shoulder to fix the insert base 225 and the second traction housing 330 together. An O-ring 226 is also provided on the fourth shoulder, sealing the second traction housing 330 to the main shaft assembly when it is fitted onto the fourth shoulder. Furthermore, a space is formed between the first traction housing 320 and the second traction housing 330, within which a traction head 310 rotatable relative to the first traction housing 320 is disposed. Figure 9 As shown, the traction head 310 protrudes after passing through the first traction housing 320, and the traction head 310 is equipped with a hook 311 for mounting traction tools such as steel wire. This effectively reduces the potential damage to the optical cable 2201 caused by torsion. The second traction housing 330 mates with the insert base 225, and through a threaded connection, can provide a tensile force exceeding 600N. An O-ring 226 exists between the second traction housing 330 and the insert base 225, providing IP68 protection, making it suitable for underground pipelines in harsh external environments.

[0072] When pulling the optical cable using the pulling assembly, it can pass through structures such as pipes or holes. When dragging the optical cable 2201 to the communication equipment, the pulling assembly is removed, and then the outdoor assembly 210 and the connector assembly 220 are engaged and secured.

[0073] This application embodiment also provides a communication device, which includes an adapter and a pre-connector that is detachably and fixedly connected to the adapter. The pre-connector provided in this application embodiment is directly connected to the optical cable 2201 by using a ferrule base 225, and the handle sleeve 211 and the main shaft 212 are made into a modular structure. When assembling the pre-connector, it is only necessary to put the outdoor component 210 onto the optical cable 2201, which facilitates the assembly of the pre-connector.

[0074] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pre-connector, characterized in that, include: Connector assembly, spindle and handle sleeve; The connector assembly includes: a ferrule base and a ferrule slidably connected to the ferrule base; wherein the ferrule base is used to fix the optical cable, and the ferrule is used to connect with the optical fiber into which the optical cable is inserted; The spindle is fitted onto the ferrule base and fixedly connected to the ferrule base, and the handle sleeve is fitted onto the outside of the spindle, wherein the spindle has a hollow chamber inside; The handle sleeve has a receiving cavity for accommodating a socket for a communication device; when the pre-connector is connected to the socket of the communication device, the spindle is inserted into the socket, and the handle sleeve is fitted over the socket.

2. The pre-connector according to claim 1, characterized in that, The connector assembly further includes a pressure sleeve, which is fitted onto the connection between the optical cable and the ferrule base, with a portion of the pressure sleeve fixedly connected to the ferrule base and another portion fixedly connected to the optical cable.

3. The pre-connector according to claim 2, characterized in that, The end of the ferrule base away from the ferrule is provided with a knurled structure that mates with the pressure sleeve.

4. The pre-connector according to claim 1, characterized in that, The connector assembly further includes a frame sleeve fitted onto the ferrule; wherein the frame sleeve is fixedly connected to the ferrule base; and the ferrule portion is exposed outside the frame sleeve.

5. The pre-connector according to claim 1, characterized in that, The inner wall of the handle sleeve is sealed to the outer wall of the spindle by an elastic sealing sleeve.

6. The pre-connector according to claim 5, characterized in that, The elastic sealing sleeve is fitted onto the end of the spindle away from the insert.

7. The pre-connector according to claim 5, characterized in that, The outer side wall of the spindle is provided with a first protrusion, and the inner side wall of the handle sleeve is provided with a second protrusion. The first protrusion and the second protrusion form a space to accommodate the elastic sealing sleeve. One end of the elastic sealing sleeve abuts against the first protrusion, and the other end abuts against the second protrusion.

8. The pre-connector according to claim 1, characterized in that, The ferrule base is also provided with an O-ring.

9. The pre-connector according to claim 1, characterized in that, The ferrule base is provided with a protrusion; the main shaft is provided with a groove that mates with the protrusion.

10. The pre-connector according to claim 1, characterized in that, When the pre-connector is assembled with the optical cable, the spindle is fitted onto the ferrule base from one end of the connector assembly near the ferrule, and the spindle is engaged and fixed with the ferrule base.

11. The pre-connector according to claim 10, characterized in that, The ferrule base is provided with a locking point; the spindle is provided with an elastic arm, and the elastic arm is provided with a slot for engaging and fixing with the locking point.

12. The pre-connector according to claim 10, characterized in that, It also includes a traction component, which is fitted onto the connector assembly and detachably fixedly connected to the connector assembly before the main shaft is engaged and fixed with the connector assembly and is used to drag the optical cable.

13. The pre-connector according to claim 12, characterized in that, The connector assembly's ferrule base is provided with external threads and an O-ring; The traction component is provided with an internal thread that mates with the external thread, and when the traction component is fitted onto the connector component, the traction component and the connector component are sealed together by the O-ring.

14. The pre-connector according to claim 1, characterized in that, It also includes a sleeve, one part of which is fitted onto the optical cable and the other part is fitted onto the spindle, sealing the connection between the optical cable and the spindle.

15. The pre-connector according to claim 14, characterized in that, It also includes a heat shrinkable sheath; part of the heat shrinkable sheath is fitted onto the optical cable, and another part is fitted onto the spindle, sealing the connection between the optical cable and the spindle; wherein, the heat shrinkable sheath is fitted onto the outside of the sleeve.

16. The pre-connector according to claim 1, characterized in that, It also includes a connecting rope fitted onto the main shaft and rotatable relative to the main shaft, and a dust cover connected to the connecting rope; wherein the dust cover is used to connect to the handle sleeve and cover the exposed insert.

17. The pre-connector according to claim 1, characterized in that, Along the axial direction of the main shaft, the length of the main shaft is greater than the length of the handle sleeve.

18. The pre-connector according to claim 1, characterized in that, Along the axial direction of the main shaft, the front end of the main shaft protrudes beyond the front end of the handle sleeve, and the rear end of the main shaft protrudes beyond the rear end of the handle sleeve.

19. The pre-connector according to claim 1, characterized in that, The chamber includes a first chamber and a third chamber, wherein the first chamber is used to fit onto the end of the ferrule base that is connected to the optical cable, and the third chamber is used to fit onto the end of the ferrule base that is close to the ferrule.

20. The pre-connector according to claim 19, characterized in that, The chamber also includes a second chamber for fitting onto the shoulder of the ferrule base.

21. The pre-connector according to claim 19, characterized in that, The third chamber is provided with an elastic arm that cooperates with the ferrule base.

22. The pre-connector according to claim 21, characterized in that, The elastic arm is provided with a slot that engages and is fixed to the locking point on the ferrule base.

23. The pre-connector according to claim 20, characterized in that, The second chamber has a protrusion at one end near the first chamber that mates with the groove of the insert base.

24. The pre-connector according to claim 1, characterized in that, The ferrule base has a hollow structure with a through cavity inside, and the ferrule and the optical cable are located at opposite ends of the cavity.

25. The pre-connector according to claim 24, characterized in that, The ferrule is inserted into the cavity from the first end of the ferrule base, and one end of the ferrule inserted into the cavity is connected to the optical fiber inserted into the cavity, while the other end of the ferrule is exposed outside the ferrule base.

26. The pre-connector according to claim 4, characterized in that, The frame and the ferrule base are fixed together by snap fasteners.

27. The pre-connector according to claim 4 or 26, characterized in that, The frame sleeve and the ferrule base work together to limit the sliding range of the ferrule.

28. The pre-connector according to claim 27, characterized in that, A compression spring is fitted onto the insert, with one end of the compression spring pressing against the insert base and the other end pressing against the insert.

29. The pre-connector according to claim 28, characterized in that, The hollow interior of the frame is provided with a first shoulder, and the hollow interior of the ferrule base is provided with a second shoulder. When the frame is fitted onto the ferrule base, the first shoulder and the second shoulder form a spatial area.

30. The pre-connector according to claim 29, characterized in that, The insert has a third shoulder located in the space defined by the first shoulder and the second shoulder.

31. The pre-connector according to claim 30, characterized in that, One end of the compression spring presses against the second shoulder of the ferrule base, and the other end presses against the third shoulder of the ferrule.

32. The pre-connector according to claim 1, characterized in that, The ferrule base is cylindrical in shape, and a fourth shoulder is provided in the middle of the ferrule base.

33. The pre-connector according to any one of claims 1-15, characterized in that, It also includes a dust cover, which includes a cap body and a sealing gasket on the side wall of the cap body.

34. The pre-connector according to claim 33, characterized in that, It also includes a connecting rope that is fitted onto the main shaft and can rotate relative to the main shaft; One end of the cap is also provided with a connecting end, which is used to connect to the connecting rope.

35. An optical cable assembly, characterized in that, Includes an optical cable and a pre-connector as described in any one of claims 1-34, wherein the optical cable is connected to the connector assembly of the pre-connector.

36. A communication device, characterized in that, It includes an adapter and an optical cable assembly as described in claim 35 that is detachably connected to the adapter.

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