Optical fiber connector

Abstract

The utility model mainly relates to the field of optical fiber communication, in particular to an optical fiber connector. A spring blocking step is arranged at the position, close to the tail, in the inner cavity of the shell. The tail part of the optical fiber fixing part is provided with an extension tube communicated with the optical fiber inner cavity, and the outer side of the extension tube is provided with a convex clamping block; when the optical fiber fixing part is close to the tail end of the inner cavity of the shell, the protruding clamping block can cross the spring blocking step to extend out. The front part of the optical cable fixing part is provided with a clamping groove, the clamping groove is matched with the protruding clamping block extending out of the spring blocking step, and the optical cable fixing part and the optical fiber fixing part are fixed; the spring is sleeved on the extension tube, and two ends of the spring respectively abut against the tail part of the optical fiber fixing part and the spring blocking step; and when the optical fiber fixing part moves backwards under the action of external force and the external force rebounds, the optical fiber fixing part and the optical cable fixing part which are fixed together move together.

Description

Technical Field

[0001] The utility model mainly relates to the field of optical fiber communication, in particular to an optical fiber connector. Background Art

[0002] Prior art, such as a patent with application number 202021872653.6 and titled "A Field-Assembled Fiber Optic Connector", discloses "an optical cable holding component, comprising at least an optical cable fixing body and a clamping portion, wherein the optical cable holding component is used to fix the outer skin of the optical cable so that the optical cable holding component and the optical cable are relatively fixed; an optical fiber fixing component, comprising an insertion portion located at the front end for configuring a ceramic ferrule, a fixing portion for fixing an inserted optical fiber, and a claw portion located at the rear end; the claw portion is used to cooperate with the clamping portion so that the optical cable holding component is configured to the rear end of the optical fiber fixing component; at the optical fiber fixing component, The main body is also provided with a spring configuration part; a spring is provided on the spring configuration part; the housing is provided with a chamber and a spring abutment part, the chamber is used to configure the optical fiber fixing part and the optical cable holding part; the optical fiber fixing part can move toward the tail together with the optical cable holding part when pressed toward the tail, and the spring abuts against the spring abutment part to rebound the optical fiber fixing part in the opposite direction. "This patent is a form in which the optical cable holding part and the optical fiber fixing part are set as one body, and when in use, the optical fiber fixing part and the optical cable holding part can move together as a whole to prevent the optical fiber between the optical cable holding part and the optical fiber fixing part from bending.

[0003] The patented structure combines the optical fiber fixing component with the optical cable holding component, sets the optical cable holding component in the chamber, and slides forward and backward. The movement of the optical cable holding component cannot be separated from the chamber, so the structure is complicated, and it requires an additional claw part for extension and connection and fixing, resulting in a longer length of the entire connector. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an optical fiber connector, which is implemented by the following technical solutions:

[0005] An optical fiber connector, a housing, having a front end and a rear end; the housing has a housing inner cavity that passes through the front and rear ends, and a spring blocking step is arranged near the rear end of the housing inner cavity;

[0006] The optical fiber fixing part has an optical fiber inner cavity for accommodating the optical fiber, and the optical fiber fixing part is used to fix the optical fiber; the optical fiber fixing part is arranged in the inner cavity of the shell and can be located in the inner cavity of the shell and move forward and backward; the tail of the optical fiber fixing part is provided with an extension tube connected with the optical fiber inner cavity, and the outer side of the extension tube is provided with a protruding block; when the optical fiber fixing part is located near the tail end of the inner cavity of the shell, the protruding block can extend over the spring blocking step;

[0007] An optical cable fixing part is arranged at the outer tail end of the housing, and is used to fix the optical cable; a card slot is arranged at the front of the optical cable fixing part, and the card slot cooperates with the protruding card block extending beyond the spring blocking step to fix the optical cable fixing part to the optical fiber fixing part;

[0008] A spring, sleeved on the extension tube, with two ends respectively abutting against the tail of the optical fiber fixing part and the spring blocking step;

[0009] When the optical fiber fixing part is moved backward by an external force and rebounds when the external force is removed, the optical fiber fixing part and the optical cable fixing part fixed together move together.

[0010] Preferably, the spring provides a forward movement tendency for the optical fiber fixing part and the optical cable fixing part fixed together;

[0011] When the optical fiber fixing portion is not subjected to external force, the optical cable fixing portion abuts against the rear end of the housing.

[0012] Preferably, the protruding block is embedded and fixed in the slot by interference fit.

[0013] Preferably, the protruding block is embedded in the slot along the axial direction.

[0014] Preferably, the optical cable fixing portion has a through hole communicating with the extension tube.

[0015] Preferably, the optical cable fixing portion includes a fixing body and a nut;

[0016] The rear portion of the fixing body is provided with a pressing arm, and the outer front portion is provided with a thread; the nut is detachably fixed to the fixing body by threaded engagement, and when the nut is fixed to the fixing body by rotation, the pressing arm is gradually squeezed, and the pressing arm is retracted inward to squeeze the optical cable, thereby fixing the optical cable to the optical cable fixing portion.

[0017] Preferably, a slide groove is provided on the inner side wall of the rear portion of the housing along the axial direction, and a slide rail cooperating with the slide groove is provided on the front portion of the optical cable fixing portion;

[0018] When the optical fiber fixing part is moved backward by external force, the optical fiber fixing part and the optical cable fixing part fixed together move forward and backward along the slide groove and the slide rail.

[0019] Preferably, the slide groove extends to the rear end of the shell and is open to the rear end; and a bell mouth is provided at the rear end of the nut.

[0020] Preferably, when the optical fiber fixing part and the optical cable fixing part fixed together move toward the rear end to an extreme position along the slide groove and the slide rail, the slide rail is located in the slide groove.

[0021] Preferably, when the optical cable fixing part and the optical fiber fixing part are assembled and fixed together, the optical fiber fixing part is located at the extreme position of the tail end, and after the slide rail enters the slide groove of the outer shell, the card groove of the optical cable fixing part is combined and fixed with the protruding card block of the optical fiber fixing part.

[0022] Beneficial effects of the utility model: the optical fiber connector provided by the utility model is directly clamped and fixed with the optical cable fixing part through the protruding clamping block on the outer side of the tail extension tube of the optical fiber fixing part, the structure is simple, and the length of the entire connector is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The disassembly of the optical fiber connector of the present patent is shown;

[0024] Figure 2 A schematic diagram of the structure of the housing of the present invention is shown;

[0025] Figure 3 A schematic diagram showing the structure of the housing and spring position of the present patent;

[0026] Figure 4 The schematic diagram of the structure of the housing, the optical fiber fixing part and the spring of the present invention is shown;

[0027] Figure 5 A schematic cross-sectional structure diagram of the housing of the present invention is shown;

[0028] Figure 6 A schematic diagram showing the structure of the optical fiber fixing part and the fixing body of the optical cable fixing part of the present invention when they are fixed together;

[0029] Figure 7 A schematic diagram showing the structure of the optical fiber fixing part and the optical cable fixing part of the present invention when the fixing bodies are separated;

[0030] Figure 8 A schematic diagram showing the structure of the fixing body of the optical cable fixing part of the present invention is shown;

[0031] Fig. 9A schematic diagram showing the assembly state of the optical fiber connector of the present invention is shown;

[0032] Fig.10 The cross-sectional structure diagram of the optical fiber fixing part and the optical cable fixing part fixed together in the present invention when no external force is applied is shown;

[0033] Fig.11 The cross-sectional structure diagram of the optical fiber fixing part and the optical cable fixing part fixed together in the present patent is shown when they move backward together after being subjected to external force. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0035] An optical fiber connector,

[0036] like Figures 1 to 11 As shown, the housing 1 has a front end 2 and a rear end 3. The housing has a housing inner cavity 4 that passes through from front to back, and a spring blocking step 5 is provided near the rear end of the housing inner cavity 4. When the spring blocking step 5 is provided, a channel is reserved on the axis of the housing 1 to allow the protruding block 8 of the optical fiber fixing part to extend from the spring blocking step 5 to the rear end.

[0037] The optical fiber fixing part 6 has an optical fiber inner cavity for accommodating an optical fiber, and the optical fiber fixing part is used to fix the optical fiber. In this patent, the optical fiber refers to the optical fiber part after the outer sheath is stripped off the optical cable, and the optical cable refers to the optical cable with an outer sheath. The optical fiber fixing part 6 is arranged in the inner cavity 4 of the shell and can be located in the inner cavity 4 of the shell and move forward and backward. The tail of the optical fiber fixing part 6 is provided with an extension tube 7 connected to the inner cavity of the optical fiber, and a protruding block 8 is provided on the outer side of the extension tube 7. The optical fiber fixing part 6 is used to lock the optical fiber. For a field assembly type connector, it can be locked by squeezing the cover plate by a clamp spring in the prior art. For a prefabricated connector, it can be fixed by injection of glue in the factory, or because the opening amount of the optical fiber and the outer coating of the optical fiber is different, the corresponding box cover and clamp spring are set with different sizes to adapt to the 0.125 bare fiber near the front end and the 0.9 fiber with a coating near the rear end. The part of the optical fiber fixing part 6 that locks the optical fiber can adopt the existing technology. During assembly, the optical fiber fixing part 6 can enter the inner cavity 4 of the shell from the front. The spring 9 is sleeved on the extension tube 7, and its two ends are respectively in contact with the tail 10 of the optical fiber fixing part 6 and the spring blocking step 5. When the optical fiber fixing part 6 is located near the tail end of the shell inner cavity 4, the protruding block 8 can extend over the spring blocking step 5. The spring blocking step 5 can be located at the tail end, or at a position near the tail end in the shell inner cavity 4. When located near the tail end in the shell inner cavity 4, the protruding block 8 can still be in the shell inner cavity 4 after passing over the spring blocking step 5. The protruding block 8 is arranged to be located at the tail end of the extension tube 7, and the protruding block 8 has a slope that gradually converges toward the tail end to facilitate the installation of the optical cable fixing part 11. A ceramic ferrule is arranged at the front end of the optical fiber fixing part 6, and the ceramic ferrule extends from the front end of the shell 1.

[0038] The optical cable fixing part 11 is arranged at the outer tail end of the housing 1, and is used to fix the optical cable. The optical cable fixing part includes a fixing body 12 and a nut 13. A card slot 14 is arranged at the front of the fixing body 12, and the card slot 14 cooperates with the protruding card block 8 extending beyond the spring blocking step 5 to fix the optical cable fixing part 11 and the optical fiber fixing part 6 together, especially in the axial direction. The protruding card block 8 is embedded and fixed with the card slot 14 by interference fit. A through hole 17 is provided at the front end of the optical cable fixing part 11, and the through hole 17 is connected with the card slot 14, so that the protruding card block 8 enters and is embedded in the card slot 14 along the axial direction from the through hole 17. The optical cable fixing part 11 has a through hole 18 connected with the extension tube 7, and the through hole 18 is used to facilitate the optical fiber to penetrate and enter the extension tube 7 and then enter the optical fiber fixing part 6.

[0039] The tail of the fixed body 11 is provided with a pressing arm 15, and the outer front part is provided with a thread 16. The nut 13 is detachably fixed to the fixed body 11 by threaded engagement. When the nut 13 is fixed to the fixed body 11 by rotation, the pressing arm 15 is gradually squeezed, and the pressing arm 15 is squeezed inward to squeeze the optical cable, thereby fixing the optical cable to the optical cable fixing part 11. A bell mouth is provided at the tail end of the nut 13, so that when the optical cable is bent, a circular arc can be extended to form a bending radius, preventing the optical cable from bending at a right angle of 90 degrees or being cut at the tail end of the nut 13. When the optical fiber fixing part 11 is moved backward by an external force and rebounds when the external force is withdrawn, the optical fiber fixing part 6 and the optical cable fixing part 11 fixed together move together. The optical fiber fixing part 6 and the optical cable fixing part 11 are fixed together mainly in the axial direction by the card slot 14 and the annular protruding card block 8. In the circumferential direction, the protruding card block 8 can be square, and the card slot 14 is designed to be similar to achieve the axial fixation of the two. The patent also provides another implementation method to fix the two in the axial direction to prevent the optical cable fixing part 11 from twisting relative to the optical fiber fixing part 6. Specifically:

[0040] A slide groove 19 is axially arranged on the inner side wall of the rear end of the housing 1. The slide groove 19 extends to the rear end of the housing 1 and is open to the rear end. A slide rail 20 cooperating with the slide groove 19 is arranged at the front of the optical cable fixing part 11. The slide rail 20 is a strip-shaped body, which can directly enter from the slide groove 19 opened at the rear end. When the optical fiber fixing part 6 moves backward under external force, the optical fiber fixing part 6 and the optical cable fixing part 11 fixed together move forward and backward along the slide groove 19 and the slide rail 20. The optical cable fixing part is limited in the circumferential direction by the slide groove 19 and the slide rail 20 to prevent the optical cable fixing part 11 from rotating. When the optical fiber fixing part 6 and the optical cable fixing part 11 fixed together move to the extreme position toward the rear end along the slide groove 19 and the slide rail 20, the slide rail 20 is still located in the slide groove. When the optical cable fixing part 11 and the optical fiber fixing part 6 are assembled and fixed together, the optical fiber fixing part 6 is located at the extreme position of the tail end, and after the slide rail 20 enters the slide groove 19 of the housing 1, the card slot 14 of the optical cable fixing part 11 is combined and fixed with the protruding card block 8 of the optical fiber fixing part 6. That is, the length of the slide groove 19 and the slide rail 20 is greater than the backward movement of the optical cable fixing part 11 and the optical fiber fixing part 6 fixed together after assembly, so as to prevent the slide groove 19 and the slide rail 20 from being separated. At the same time, the present patent can also adopt other structures that can independently realize the fixing of the optical cable at the rear of the card slot 14.

[0041] After the optical fiber fixing part 6 is installed into the shell 1 from the front end, the protruding block 8 passes over the spring blocking step 5 and moves as far back as possible, and then the slide rail 20 of the optical cable fixing part 11 is aligned with the slide groove 19 at the rear end of the shell 1, and then pressed in, so that the protruding block 8 at the rear end of the optical fiber fixing part 6 is embedded in the card groove 14 of the optical cable fixing part 11, so that the two are fixed together. Release the optical cable fixing part 11, and the spring 9 provides a forward movement tendency for the optical fiber fixing part 6 and the optical cable fixing part 11 fixed together. When the optical fiber fixing part 6 is not subject to external force, the optical cable fixing part 11 abuts against the rear end of the shell 1, limiting the forward movement tendency of the optical fiber fixing part 6 and the optical cable fixing part 11 fixed together. When the optical fiber fixing part 6 is squeezed inward by external force, the spring is compressed, and the optical fiber fixing part 6 and the optical cable fixing part 11 fixed together retreat together, so that the optical fiber or optical cable will not bend inside the entire connector. It should be explained here that Fig.10 The spring blocking step 5 is blocked by the through hole 17 of the fixed body 12 at this viewing angle, and Fig.11 The fixed body 12 moves back, exposing the spring blocking step 5. Fig.10 The middle spring 9 always abuts against the spring blocking step 5 located outside the through hole 17. Fig.10 The middle spring 9 is shown to be close to the through hole 17 due to the visual angle error, but in fact the two are located at different positions in the radial direction. The structure of the patent can be applied to the structure of optical fiber connectors such as SC, LC and FC.

Claims

1. An optical fiber connector, characterized in that: The shell has a front end and a rear end; the shell has a shell inner cavity that passes through the front and rear ends, and a spring blocking step is provided near the rear end of the shell inner cavity; The optical fiber fixing part has an optical fiber inner cavity for accommodating the optical fiber, and the optical fiber fixing part is used to fix the optical fiber; the optical fiber fixing part is arranged in the inner cavity of the shell and can be located in the inner cavity of the shell and move forward and backward; the tail of the optical fiber fixing part is provided with an extension tube connected with the optical fiber inner cavity, and the outer side of the extension tube is provided with a protruding block; when the optical fiber fixing part is located near the tail end of the inner cavity of the shell, the protruding block can extend over the spring blocking step; An optical cable fixing part is arranged at the outer tail end of the housing, and is used to fix the optical cable; a card slot is arranged at the front of the optical cable fixing part, and the card slot cooperates with the protruding card block extending beyond the spring blocking step to fix the optical cable fixing part to the optical fiber fixing part; A spring, sleeved on the extension tube, with two ends respectively abutting against the tail of the optical fiber fixing part and the spring blocking step; When the optical fiber fixing part is moved backward by an external force and rebounds when the external force is removed, the optical fiber fixing part and the optical cable fixing part fixed together move together.

2. The optical fiber connector according to claim 1, characterized in that: The spring provides a forward movement tendency for the optical fiber fixing part and the optical cable fixing part fixed together; When the optical fiber fixing portion is not subjected to external force, the optical cable fixing portion abuts against the rear end of the housing.

3. The optical fiber connector according to claim 1, characterized in that: The protruding clamping block is embedded and fixed in the clamping slot by interference fit.

4. The optical fiber connector according to claim 3, characterized in that: The protruding clamping block is axially embedded in the clamping groove.

5. The optical fiber connector according to claim 1, characterized in that: The optical cable fixing portion has a through hole communicating with the extension tube.

6. The optical fiber connector according to claim 1, characterized in that: The optical cable fixing part comprises a fixing body and a nut; The rear portion of the fixing body is provided with a pressing arm, and the outer front portion is provided with a thread; the nut is detachably fixed to the fixing body by threaded engagement, and when the nut is fixed to the fixing body by rotation, the pressing arm is gradually squeezed, and the pressing arm is retracted inward to squeeze the optical cable, thereby fixing the optical cable to the optical cable fixing portion.

7. The optical fiber connector according to any one of claims 1 to 6, characterized in that: The inner side wall of the rear portion of the housing is provided with a slide groove along the axial direction, and the front portion of the optical cable fixing portion is provided with a slide rail matched with the slide groove; When the optical fiber fixing part is moved backward by external force, the optical fiber fixing part and the optical cable fixing part fixed together move forward and backward along the slide groove and the slide rail.

8. The optical fiber connector according to claim 7, characterized in that: The slide groove extends to the rear end of the housing and is open to the rear end; The tail end of the nut is provided with a bell mouth.

9. The optical fiber connector according to claim 7, characterized in that: When the optical fiber fixing part and the optical cable fixing part fixed together move to the rear end along the slide groove and the slide rail to the extreme position, the slide rail is located in the slide groove.

10. The optical fiber connector according to claim 7, characterized in that: When the optical cable fixing part and the optical fiber fixing part are assembled and fixed together, the optical fiber fixing part is located at the extreme position of the tail end. After the slide rail enters the slide groove of the outer shell, the card groove of the optical cable fixing part is combined and fixed with the protruding card block of the optical fiber fixing part.

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