High-precision integrated LC type optical fiber connector

Abstract

The utility model discloses a high-precision integrated LC type optical fiber connector, which comprises a shell, a first limiting groove is arranged on the rear side in the shell, a slot is arranged in the shell at the front end of the first limiting groove, and a second check ring is fixedly connected in the shell at the position close to the front side. According to the LC connector positioning component, the connecting pipe, the connecting shell, the inserting core and the shell are specially designed, specifically, the inserting core is inserted into the connecting shell, the connecting shell is of a quadrilateral structure, the second limiting groove is also of a quadrilateral structure, and a small gap is formed between an inner quadrilateral and an outer quadrilateral, so that radial angle deflection cannot occur after assembly, and the assembling precision is improved. According to the utility model, the positioning among the connecting pipe, the connecting shell, the insertion core and the shell is more accurate, the offset of the insertion core is small when the connector is butted, the butting precision is further improved, and the butting loss is reduced and stable and can reach 0.1 dB.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber connectors, in particular to a high-precision integrated LC type optical fiber connector. Background Art

[0002] For ordinary LC-type fiber optic connectors, the industry standard requires that the loss of the fiber optic link of the standard line is less than 0.3dB. Therefore, the industry generally designs the locking matching structure of the flange and the housing of this product to be hexagonal. The hexagonal flange is matched with the inner hexagon of the housing to meet the docking requirements of the ferrule. For the LC-APC docking link, since the end face is an inclined surface, a force deviating from the optical fiber axis will be generated during docking, which will cause the ferrule to shift during docking, thereby increasing the docking loss and making it unstable. The actual test loss usually fluctuates within the range of 0.2 to 0.5dB. This fluctuation has caused great interference to the application of communication device testing, high-speed optical transmission, coherent optical communication and optical fiber sensing.

[0003] In order to accurately position the LC ferrule and the housing, reduce the ferrule offset when the connectors are docked, improve docking accuracy, reduce docking loss, and make it more stable, the utility model provides a high-precision integrated LC type fiber optic connector. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a high-precision integrated LC type optical fiber connector.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-precision integrated LC type fiber optic connector, comprising a shell, a first limiting groove is arranged on the inner rear side of the shell, a slot is arranged on the inner side of the shell at the front end of the first limiting groove, a second retaining ring is fixedly connected to the inner side of the shell near the front side, a second limiting groove is arranged on the inner side of the shell between the rear side of the second retaining ring and the slot, sleeves are arranged on the inside of the first limiting groove and the slot, a connecting shell is inserted on the inside of the second limiting groove, and a core is inserted on the front end of the connecting shell.

[0006] Furthermore, a clamping plate is obliquely and fixedly connected to the front side of the upper end of the shell, and a connecting plate is fixedly connected to the rear end of the clamping plate.

[0007] Furthermore, both left and right ends of the shell are provided with slots near the rear side, and both left and right ends of the shell are fixedly connected to limit blocks at the front ends of the slots.

[0008] Furthermore, a limiting sleeve is sleeved on the outer side of the shell, a pressing plate is obliquely fixedly connected to the rear side of the outer upper end of the limiting sleeve, and the lower side of the front end of the pressing plate is clamped and connected to the connecting plate.

[0009] Furthermore, both left and right ends of the inner side of the limiting sleeve are fixedly connected with limiting plates, and the limiting plates are respectively connected with corresponding slots, and a slot is formed at the lower end of the limiting sleeve.

[0010] Furthermore, the sleeve includes a mounting tube, and a limiting ring is fixedly connected to the outer side of the mounting tube near the front end, the upper and lower ends of the limiting ring are both planar structures, the upper and lower sides of the first limiting groove are both planar structures, and the limiting ring is clamped and connected to the first limiting groove.

[0011] Furthermore, a first retaining ring is fixedly connected to the outer side of the mounting tube near the rear end, and a plurality of grooves are formed at the rear end of the outer side of the mounting tube.

[0012] Furthermore, a connecting pipe is fixedly connected to the rear end of the connecting shell, the connecting shell is connected to the second limiting groove by clamping, and a plug hole is arranged inside the plug core.

[0013] Beneficial effects of the utility model:

[0014] When the utility model is in use, the high-precision integrated LC type fiber optic connector is specially designed for the LC connector positioning components, namely, the connecting tube, the connecting shell, the ferrule and the shell. Specifically, the ferrule is inserted into the connecting shell, the connecting shell is a quadrilateral structure, and the second limiting groove is also a quadrilateral structure. The inner and outer quadrilaterals provide a small gap. Therefore, radial angular deflection will not occur after assembly, so that the positioning between the connecting tube, the connecting shell, the ferrule and the shell is more accurate, and the ferrule offset is small when the connectors are docked, thereby improving the docking accuracy, and the docking loss becomes smaller and more stable, which can reach 0.1dB. In addition, the external dimensions of the design are consistent with those of the existing ordinary LC connectors. Therefore, it is compatible with the existing ordinary LC connectors without conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 : A front view of the utility model;

[0017] Figure 2 : Schematic diagram of the card slot and limit block structure of the utility model;

[0018] Figure 3 : Schematic diagram of the casing structure of the utility model;

[0019] Figure 4 : Schematic diagram of the internal structure of the sleeve and the ferrule installation of the utility model;

[0020] Figure 5 : Schematic diagram of the internal structure of the shell of the utility model;

[0021] Figure 6 : Schematic diagram of the sleeve and ferrule connection structure of the utility model;

[0022] Figure 7 : A cross-sectional view of the sleeve and ferrule connection structure of the utility model;

[0023] Figure 8 : Schematic diagram of the limiting sleeve structure of the utility model.

[0024] The reference numerals are as follows:

[0025] 1. Shell; 2. Card plate; 3. Connecting plate; 4. Limiting sleeve; 5. Pressing plate; 6. Sleeve; 7. Insert core; 8. Limiting block; 9. Card slot; 10. Mounting tube; 11. First retaining ring; 12. Limiting ring; 13. Groove; 14. First limiting groove; 15. Slot; 16. Second limiting groove; 17. Second retaining ring; 18. Connecting tube; 19. Connecting shell; 20. Insert hole; 21. Limiting plate; 22. Slot. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1-8 As shown, it relates to a high-precision integrated LC type optical fiber connector, including a shell 1, a first limiting groove 14 is arranged on the inner rear side of the shell 1, a slot 15 is arranged on the inner side of the shell 1 at the front end of the first limiting groove 14, a second retaining ring 17 is fixedly connected to the inner side of the shell 1 near the front side, a second limiting groove 16 is arranged on the inner side of the shell 1 between the rear side of the second retaining ring 17 and the slot 15, a sleeve 6 is arranged on the inner side of the first limiting groove 14 and the slot 15, a connecting shell 19 is inserted on the inner side of the second limiting groove 16, and a core 7 is inserted on the front end of the connecting shell 19.

[0028] like Figure 1-8 As shown, the upper front side of the shell 1 is obliquely fixedly connected with a card plate 2, the rear end of the card plate 2 is fixedly connected with a connecting plate 3, the left and right ends of the shell 1 are provided with card slots 9 near the rear side, the left and right ends of the shell 1 are located at the front end of the card slot 9 and are fixedly connected with a limiting block 8, the outer side of the shell 1 is sleeved with a limiting sleeve 4, the outer upper rear side of the limiting sleeve 4 is obliquely fixedly connected with a pressing plate 5, the lower front end of the pressing plate 5 is connected with the connecting plate 3, and the left and right ends of the inner side of the limiting sleeve 4 are A limit plate 21 is fixedly connected, and the limit plates 21 are respectively connected with the corresponding card slots 9. A slot 22 is provided at the lower end of the limit sleeve 4. The limit sleeve 4 is clamped at the rear end of the shell 1 so that the limit plate 21 and the card slot 9 are clamped. At this time, the limit block 8 limits the front end of the limit sleeve 4. The provided slot 22 facilitates the separation of the lower end of the limit sleeve 4. The card plate 2 can be clamped inside the connector slot. By pressing the pressing plate 5, the connecting plate 3 can be pressed down to release the clamping of the card plate 2 and the slot.

[0029] like Figure 1-8 As shown, the sleeve 6 includes a mounting tube 10, and a limiting ring 12 is fixedly connected to the outer side of the mounting tube 10 near the front end. The upper and lower ends of the limiting ring 12 are both planar structures, and the upper and lower sides of the first limiting groove 14 are both planar structures. The limiting ring 12 is connected to the first limiting groove 14 by clamping, and the outer side of the mounting tube 10 near the rear end is fixedly connected to the first retaining ring 11. The sleeve 6 is inserted into the first limiting groove 14, and the set limiting ring 12 is clamped with the first limiting groove 14. At this time, the first retaining ring 11 is connected to the housing 1. The rear end is top-mounted to limit the sleeve 6, a plurality of grooves 13 are provided on the outer rear end of the mounting tube 10, a connecting tube 18 is fixedly connected to the rear end of the connecting shell 19, the connecting shell 19 is clamped and connected with the second limiting groove 16, a plug hole 20 is provided inside the ferrule 7, the mounting tube 10 is used to pass the optical fiber and fix the outer coating of the optical fiber, the plug hole 20 is provided to facilitate the inner core of the optical fiber to pass through and limit it, and the connecting tube 18, the connecting shell 19, and the ferrule 7 are all made of ceramic materials.

[0030] Working principle: When in use, first insert the ferrule 7 and the connecting shell 19 for connection, and then clamp the connecting shell 19 and the second limiting groove 16. At this time, the ferrule 7 passes through the second retaining ring 17, and the second retaining ring 17 limits the front end of the connecting shell 19. Then, the sleeve 6 is inserted into the first limiting groove 14, and the set limiting ring 12 is clamped with the first limiting groove 14. At this time, the first retaining ring 11 is set on the top of the rear end of the shell 1 to limit the sleeve 6. Finally, the limiting sleeve 4 is clamped at the rear end of the shell 1, so that the limiting plate 21 is clamped with the clamping groove 9. At this time, the limiting block 8 limits the front end of the limiting sleeve 4, and the LC connector positioning component connecting tube 18 and the connecting shell are connected. 19. The ferrule 7 and the shell 1 are specially designed. Specifically, the ferrule 7 is inserted into the connecting shell 19. The connecting shell 19 is a quadrilateral structure. The second limiting groove 16 is also a quadrilateral structure. The inner and outer quadrilaterals give a small gap. Therefore, radial angular deflection will not occur after assembly, so that the positioning between the connecting tube 18, the connecting shell 19, the ferrule 7 and the shell 1 is more accurate, and the offset of the ferrule 7 is small when the connectors are docked, thereby improving the docking accuracy, and the docking loss becomes smaller and more stable, which can reach 0.1dB. In addition, the external dimensions of this design are consistent with those of existing ordinary LC connectors. Therefore, it is compatible with existing ordinary LC connectors without conversion.

[0031] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-precision integrated LC type optical fiber connector, comprising a housing (1), characterized in that: A first limiting groove (14) is arranged at the rear side of the interior of the shell (1); a slot (15) is arranged at a position located at the front end of the first limiting groove (14) inside the shell (1); a second retaining ring (17) is fixedly connected to a position near the front side of the interior of the shell (1); a second limiting groove (16) is arranged at a position between the rear side of the second retaining ring (17) and the slot (15) inside the shell (1); a sleeve (6) is arranged inside the first limiting groove (14) and the slot (15); a connecting shell (19) is inserted inside the second limiting groove (16); and a plug core (7) is inserted at the front end of the connecting shell (19).

2. A high-precision integrated LC type optical fiber connector according to claim 1, characterized in that: A clamping plate (2) is fixedly connected to the front side of the upper end of the housing (1) in an inclined manner, and a connecting plate (3) is fixedly connected to the rear end of the clamping plate (2).

3. The high-precision integrated LC type optical fiber connector according to claim 1, characterized in that: The left and right ends of the shell (1) are both provided with card slots (9) near the rear side, and the left and right ends of the shell (1) are both fixedly connected to limit blocks (8) at the front ends of the card slots (9).

4. The high-precision integrated LC type optical fiber connector according to claim 1, characterized in that: The outer side of the housing (1) is sleeved with a limiting sleeve (4), the rear side of the outer upper end of the limiting sleeve (4) is obliquely fixedly connected with a pressing plate (5), and the lower side of the front end of the pressing plate (5) is clamped and connected with the connecting plate (3).

5. The high-precision integrated LC optical fiber connector according to claim 4, characterized in that: The left and right ends of the inner side of the limiting sleeve (4) are both fixedly connected to limiting plates (21), and the limiting plates (21) are respectively connected to corresponding slots (9) by clamping, and the lower end of the limiting sleeve (4) is provided with a slot (22).

6. The high-precision integrated LC type optical fiber connector according to claim 1, characterized in that: The sleeve (6) comprises a mounting tube (10), a limiting ring (12) being fixedly connected to the outer side of the mounting tube (10) near the front end, the upper and lower ends of the limiting ring (12) being both planar structures, the upper and lower sides of the first limiting groove (14) being both planar structures, and the limiting ring (12) being connected to the first limiting groove (14) by a clamping arrangement.

7. The high-precision integrated LC type optical fiber connector according to claim 6, characterized in that: A first retaining ring (11) is fixedly connected to the outer side of the mounting tube (10) near the rear end, and a plurality of grooves (13) are provided at the rear end of the outer side of the mounting tube (10).

8. The high-precision integrated LC type optical fiber connector according to claim 1, characterized in that: The rear end of the connection shell (19) is fixedly connected to a connection pipe (18); the connection shell (19) is a quadrilateral structure; the second limiting groove (16) is a quadrilateral structure; the connection shell (19) is connected to the second limiting groove (16) by a clamping arrangement; and a plug hole (20) is provided inside the plug core (7).

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