Optical fiber butt joint device

Abstract

The invention relates to the technical field of optical fiber transmission, and discloses an optical fiber butt joint device, a push block and an optical fiber array form an optical fiber positioning assembly which is arranged in an assembling cavity of a shell, the coupling end of the optical fiber array is exposed out of the shell, the push block and the assembling cavity are in clearance fit in the X-axis direction, the Y-axis direction and the Z-axis direction respectively, and optical fibers have sufficient space for matching during coupling; the fork tail piece can be pushed to press and push the elastic piece to push the push block to be stably assembled in place, so that the optical fiber positioning assembly is prevented from moving back and forth, and the fork tail piece and the shell are locked at the same time; the two optical fiber positioning units are oppositely inserted into the two ends of the connecting sleeve, and the pressing elastic pieces press the corresponding optical fiber positioning assemblies in the Z-axis direction to prevent the optical fiber positioning assemblies from jumping up and down. The contact pin and the positioning grooves of the two optical fiber arrays relatively slide along the axial direction of the contact pin until the two coupling ends are in butt joint, so that the optical fiber positioning assembly is prevented from shaking left and right during assembly, the butt joint precision of the two coupling ends is ensured, the structural stability of the optical fiber butt joint device during repeated insertion is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber transmission, in particular to an optical fiber butt joint device. BACKGROUND

[0002] In the prior art, the optical fiber connector is a device for detachable connection between optical fibers, which is used for repeated plugging between optical fibers, and precisely butts two end faces of the optical fiber to maximize the coupling of the light energy output by the transmitting optical fiber into the receiving optical fiber, and minimize the impact on the system due to its intervention in the optical link, which is the basic requirement of the optical fiber connector. To some extent, the optical fiber connector affects the reliability and performance of the optical transmission system.

[0003] At present, the optical fiber movable joint at the optical fiber connector needs to be plugged and butted multiple times, which may cause the plugging structure to be loose and unstable, or gradually damage the butt joint precision, which has a huge impact on optical fiber transmission. Therefore, an optical fiber butt joint device is urgently needed to effectively solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide an optical fiber butt joint device that ensures self-adaptive precise butt joint of optical fibers in all directions and front and rear directions, stable assembly structure, facilitates repeated plugging and prolongs service life.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] The optical fiber butt joint device comprises:

[0007] Two optical fiber positioning units, the optical fiber positioning unit comprises a shell, an optical fiber positioning assembly and a pushing assembly, the inside of the shell is provided with an assembly cavity, one end of the shell is provided with a mounting end, the other end of the shell is provided with a connecting end, the mounting end and the connecting end are in communication with the assembly cavity;

[0008] The optical fiber positioning assembly comprises an optical fiber array and a push block, the push block is fixed with the optical fiber array, the optical fiber positioning assembly is placed in the assembly cavity, so that the coupling end of the optical fiber array is exposed from the connecting end, the push block and the assembly cavity are gap-fitted in the direction of X axis, Y axis and Z axis respectively, the direction of X axis is the extension direction of the coupling end, and the direction of Z axis is perpendicular to the upper surface of the optical fiber array close to the coupling end;

[0009] The pushing assembly comprises a fork tail piece and a pushing elastic piece connected with each other, one end of the pushing assembly can pass through the mounting end, so that the pushing elastic piece and the push block abut along the direction of X axis, and the fork tail piece is locked with the shell;

[0010] The connecting locking unit comprises a connecting sleeve, a needle positioning assembly and two compression elastic members arranged on the inner side upper surface of the connecting sleeve, the compression elastic members are arranged in one-to-one correspondence with the housings, two housings can be inserted into the two ends of the connecting sleeve to make the compression elastic members abut against the upper surfaces of the fiber array close to the coupling end; the needle positioning assembly comprises a connecting base plate and a plug pin, the connecting base plate is installed on the inner side lower surface of the connecting sleeve, the plug pin is arranged in the limiting part of the connecting base plate, the lower surfaces of the two fiber arrays close to the coupling end are each provided with a positioning groove for clamping the plug pin, the plug pin and the positioning groove can slide in the direction of the X axis until the two coupling ends are docked.

[0011] As an optional technical solution of the fiber docking device, the connecting sleeve and the housing are selectively locked.

[0012] As an optional technical solution of the fiber docking device, the compression elastic member is arranged as an arc-shaped elastic sheet, the connecting end of the housing close to the upper surface of the coupling end is hollow, and the outer arc surface of the arc-shaped elastic sheet abuts against the upper surface of the fiber array close to the coupling end.

[0013] As an optional technical solution of the fiber docking device, the upper surface of the fiber array close to the coupling end is provided with a pit, and the outer arc surface of the arc-shaped elastic sheet is in contact with the pit.

[0014] As an optional technical solution of the fiber docking device, the arc radius of the arc-shaped elastic sheet is 20-30 mm, and the elastic force between the arc-shaped elastic sheet and the fiber array is 10-20 N.

[0015] As an optional technical solution of the fiber docking device, the fiber positioning assembly further comprises a positioning plate fixed to the bottom of the fiber array, the positioning plate is provided with a plug-in slot, and the plug-in slot is provided with a trumpet-shaped opening at the end of the plug-in slot, and the plug pin is selectively arranged in the plug-in slot.

[0016] As an optional technical solution of the fiber docking device, the connecting base plate and the connecting sleeve are detachably connected.

[0017] As an optional technical solution of the fiber docking device, the limiting part gap is protruded on both sides of the plug pin, the connecting base plate is provided with a placing groove, and the plug pin is arranged in the placing groove.

[0018] As an optional technical solution of the fiber docking device, the tolerance of the push block and the housing along the X axis direction is 0.15-0.25 mm, and the tolerance of the push block and the housing along the Y axis and the Z axis direction is 0.01-0.03 mm.

[0019] As an optional technical solution of the optical fiber butt joint device, the butt joint tolerance between the two housings in the Y-axis direction is 0.002mm-0.01mm.

[0020] The present application has the following beneficial effects:

[0021] The optical fiber butt joint device provided by the present application comprises a connecting and locking unit and two optical fiber positioning units. The optical fiber positioning unit comprises a housing, an optical fiber positioning assembly and a pushing assembly. The optical fiber positioning assembly comprises an optical fiber array and a push block. The optical fiber array is used for integrated positioning of optical fibers. The push block is fixed with the optical fiber array. The optical fiber positioning assembly is arranged in an assembly cavity of the housing, so that the coupling end of the optical fiber array is exposed from the connecting end of the housing. The push block is clearance-fitted with the assembly cavity in the directions of X-axis, Y-axis and Z-axis, so that the optical fibers have sufficient space for matching in the coupling interval. The pushing assembly comprises a fork tail member and a pushing elastic member connected with each other. One end of the pushing assembly can pass through the mounting end of the housing, so that the pushing elastic member abuts against the push block in the direction of X-axis. When the fork tail member is pushed, the pushing elastic member can be compressed to push the push block in the assembly cavity to be stably assembled in place, so as to avoid the front and back movement of the optical fiber positioning assembly, and the fork tail member is locked with the housing. The connecting and locking unit comprises a connecting sleeve, a pin positioning assembly and two pressing elastic members. The two optical fiber positioning units can be inserted into the two ends of the connecting sleeve, so that the pressing elastic members abut against the upper surfaces of the corresponding optical fiber arrays close to the coupling end. The pressing elastic members press the optical fiber positioning assembly in the direction of Z-axis, so as to prevent the optical fiber positioning assembly from jumping up and down, and to stabilize the assembly structure. The pin positioning assembly comprises a connecting base plate and a pin. The pin is arranged in a limiting portion of the connecting base plate, so as to limit the rolling freedom of the pin in the direction of Y-axis. The lower surfaces of the two optical fiber arrays close to the coupling end are each provided with a positioning groove for clamping the pin. The pin and the positioning groove can slide relative to each other in the axial direction of the pin until the two coupling ends are butt jointed, so as to prevent the optical fiber positioning assembly from shaking left and right during assembly, and to ensure the butt joint precision of the two coupling ends.

[0022] The optical fiber positioning assembly can ensure that the assembly positions thereof in the directions of X-axis, Y-axis and Z-axis are self-adaptable during the butt joint process of the optical fiber positioning unit and the connecting and locking unit, so as to realize precise butt joint. The structure stability of the optical fiber butt joint device during repeated insertion can be improved by means of setting elastic mechanisms and self-locking mechanisms, so as to prolong the service life of the optical fiber butt joint device. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structure schematic view of the optical fiber positioning assembly of the optical fiber butt joint device provided by the embodiment of the present application;

[0024] Figure 2 is a structure schematic view of the housing and the optical fiber positioning assembly of the optical fiber butt joint device provided by the embodiment of the present application;

[0025] Figure 3 is a first sectional view of a housing and a fiber positioning assembly of the fiber docking device provided in the specific embodiments of the present application;

[0026] Figure 4 is a second sectional view of a housing and a fiber positioning assembly of the fiber docking device provided in the specific embodiments of the present application;

[0027] Figure 5 is a structural schematic view of a pushing assembly of the fiber docking device provided in the specific embodiments of the present application;

[0028] Figure 6 is a structural schematic view of a fiber positioning unit of the fiber docking device provided in the specific embodiments of the present application;

[0029] Figure 7 is a partial sectional view of the fiber positioning unit of the fiber docking device provided in the specific embodiments of the present application;

[0030] Figure 8 is a structural schematic view of a housing and a fiber positioning assembly of another fiber docking device provided in the specific embodiments of the present application;

[0031] Figure 9 is a structural schematic view of a connection locking unit of the fiber docking device provided in the specific embodiments of the present application;

[0032] Figure 10 is a sectional view of the connection locking unit of the fiber docking device provided in the specific embodiments of the present application;

[0033] Figure 11 is a structural schematic view of the fiber docking device provided in the specific embodiments of the present application.

[0034] In the drawings:

[0035] 100, fiber positioning unit; 110, housing; 111, assembly cavity; 112, second self-locking buckle; 120, fiber positioning assembly; 121, fiber array; 1211, coupling end; 1212, positioning groove; 122, pushing block; 123, positioning plate; 1231, insertion slot; 130, pushing assembly; 131, fork tail piece; 1311, first self-locking buckle; 132, pushing elastic piece;

[0036] 200, connection locking unit; 210, connection sleeve; 220, pressing elastic piece; 230, connection base plate; 231, limiting portion; 232, placement slot; 240, insertion pin. DETAILED DESCRIPTION

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] like Figures 1 to 11 As shown, the present invention discloses an optical fiber docking device, including a connection locking unit 200 and two corresponding optical fiber positioning units 100. The two optical fiber positioning units 100 are used to fix the transmitting optical fiber and the receiving optical fiber, respectively, and the connection locking unit 200 is used to connect the two to transmit optical energy.

[0042] The optical fiber positioning unit 100 comprises a shell 110, an optical fiber positioning assembly 120 and a pushing assembly 130. The shell 110 is internally provided with an assembly cavity 111. One end of the shell 110 is provided with a mounting end, and the other end of the shell 110 is provided with a connecting end. Both the mounting end and the connecting end are in communication with the assembly cavity 111. The optical fiber positioning assembly 120 comprises an optical fiber array 121 and a push block 122. The optical fiber array 121 is used for integrated positioning of optical fibers, and the push block 122 is fixed with the optical fiber array 121. The optical fiber positioning assembly 120 is placed in the assembly cavity 111, so that the coupling end 1211 of the optical fiber array 121 is exposed from the connecting end of the shell 110. The push block 122 is in clearance fit with the assembly cavity 111 of the shell 110 in the directions of X-axis, Y-axis and Z-axis, respectively. Meanwhile, the optical fiber array 121 is placed in the push block 122. The high-precision assembly combination between the push block 122 and the shell 110 allows the optical fibers to have sufficient space for matching in the coupling. The direction of the X-axis is the extension direction of the coupling end 1211, the direction of the Z-axis is perpendicular to the upper surface of the optical fiber array 121 close to the coupling end 1211, and the X-axis, the Y-axis and the Z-axis are perpendicular to each other. The pushing assembly 130 comprises a fork tail piece 131 and a pushing elastic piece 132 connected with each other. One end of the pushing assembly 130 can pass through the mounting end, so that the pushing elastic piece 132 abuts against the push block 122 in the direction of the X-axis. When the fork tail piece 131 is pushed, the pushing elastic piece 132 can be compressed to push the push block 122 in the assembly cavity 111 to a stable position. The optical fiber positioning assembly 120 can be stably assembled in the direction of the X-axis, and the optical fiber positioning assembly 120 can be prevented from moving forward and backward. Meanwhile, a first self-locking buckle 1311 on the fork tail piece 131 is locked with a lock hole on the shell 110. It can be understood that the fork tail piece 131 is hollow, and the optical fiber end of the optical fiber array 121 passes through the fork tail piece 131.

[0043] The connecting locking unit 200 comprises a connecting sleeve 210, a needle positioning assembly and two compression elastic members 220. The compression elastic members 220 are arranged on the inner side upper surface of the connecting sleeve 210, and the compression elastic members 220 are arranged in one-to-one correspondence with the housings 110. After the housings 110, the fiber positioning assembly 120 and the pushing assembly 130 are combined together, the two housings 110, i.e., the two fiber positioning units 100, can be relatively inserted into the two ends of the connecting sleeve 210, so that the compression elastic members 220 abut against the upper surfaces of the fiber array 121 close to the coupling end 1211, and the compression elastic members 220 press the fiber positioning assembly 120 in the Z-axis direction to prevent the fiber positioning assembly 120 from jumping up and down and stabilize the assembly structure. The needle positioning assembly comprises a connecting base plate 230 and a needle 240, the connecting base plate 230 is installed on the inner side lower surface of the connecting sleeve 210, and the needle 240 is arranged in the limiting portion 231 of the connecting base plate 230 to limit the rolling freedom of the needle 240 in the Y-axis direction; the lower surfaces of the two fiber array 121 close to the coupling end 1211 are each provided with a positioning groove 1212 for clamping the needle 240, and the needle 240 and the positioning groove 1212 can relatively slide in the axial direction of the needle 240, i.e., the X-axis direction, until the two coupling ends 1211 are butt-jointed, which prevents the fiber positioning assembly 120 from shaking left and right during assembly and ensures the butt-jointing accuracy of the two coupling ends 1211. The fiber positioning assembly 120 can ensure that the assembly positions thereof in the X-axis, Y-axis and Z-axis directions are self-adaptively adjustable during butt-jointing of the fiber positioning unit 100 and the connecting locking unit 200, which is flexible and stable to realize precise butt-jointing; and the structure stability of the fiber butt-jointing device during repeated plugging can be improved and the service life of the fiber butt-jointing device can be prolonged by adopting the elastic mechanism and the self-locking mechanism.

[0044] Specifically, the second self-locking buckle 112 is arranged on the housing 110, and the second self-locking buckle 112 can be clamped with the lock hole on the connecting sleeve 210 to selectively lock the connecting sleeve 210 and the housing 110; the second self-locking buckle 112 is pressed to be separated from the lock hole on the connecting sleeve 210, so that the connecting locking unit 200 and the fiber positioning unit 100 can be separated.

[0045] In the embodiment, the assembly conditions of the fiber positioning assembly 120 and the housing 110 are specified, and in particular, the assembly accuracy of the push block 122 is that the tolerance range M of the two ends of the push block 122 and the housing 110 in the Y-axis and Z-axis directions is 0.01mm-0.03mm; and the tolerance range N of the two ends of the push block 122 and the housing 110 in the X-axis direction is 0.15mm-0.25mm. In order to further control the butt-jointing accuracy, after the needle 240 is arranged in the positioning groove 1212, the butt-jointing tolerance between the two housings 110 in the Y-axis direction is controlled to be 0.002mm-0.01mm to control the qualified rate during butt-jointing.

[0046] Optionally, the optical fiber positioning assembly 120 further comprises a positioning plate 123 fixed to the bottom of the optical fiber array 121, the positioning plate 123 is bonded on the bottom of the optical fiber array 121, the positioning plate 123 is provided with a slot 1231, and the positioning plate 123 is provided with a trumpet-shaped opening at the end of the slot 1231, the trumpet-shaped opening has a guiding effect on the pin 240, and the pin 240 can be selectively placed in the slot 1231.

[0047] Correspondingly, the limiting portion 231 is protruded on both sides of the pin 240, and the rolling freedom of the pin 240 in the Y-axis direction is limited within a certain range; meanwhile, the connecting substrate 230 is provided with a placing groove 232, and the pin 240 can be placed in the placing groove 232 in a normal case to temporarily fix the position, so that the adaptive movement of the pin 240 is not limited when the optical fiber positioning assembly 120 is docked.

[0048] Specifically, for the optical fiber docking device which needs to be repeatedly plugged, the connecting substrate 230 and the pin 240 will be repeatedly worn, which is easy to reduce the docking accuracy, especially the connecting substrate 230 is usually prepared by injection molding process, which is not as stable as the pin 240 structure made of metal material, therefore, the connecting substrate 230 and the connecting sleeve 210 are detachably connected, so that the connecting substrate 230 can be replaced in time, and only partial accessories can be replaced, so that the production cost is reduced and the docking accuracy is better maintained.

[0049] In the embodiment, the elastic pressing member 220 is an arc-shaped elastic sheet, the connecting end of the shell 110 is hollowed out on the upper surface close to the coupling end 1211, and the outer arc surface of the arc-shaped elastic sheet can abut against the upper surface of the optical fiber array 121 close to the coupling end 1211 at the hollowed-out position. A pit is arranged on the upper surface of the optical fiber array 121 close to the coupling end 1211, the outer arc surface of the arc-shaped elastic sheet is in contact with the pit for limiting, so that the docking structure of the connecting and locking unit 200 and the optical fiber positioning unit 100 is more stable and slipping is avoided. Exemplarily, the arc radius of the arc-shaped elastic sheet is 20mm-30mm, and the elastic force between the arc-shaped elastic sheet and the optical fiber array 121 is 10N-20N, so that the optical fiber positioning assembly 120 can be stably pressed.

[0050] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. It is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A fiber optic interface device, characterized by, The application relates to a fiber positioning device. The fiber positioning device comprises two fiber positioning units (100), a connecting locking unit (200) and a fiber array (121). The fiber positioning unit (100) comprises a shell (110), a fiber positioning assembly (120) and a pushing assembly (130). The shell (110) is internally provided with an assembling cavity (111), one end of the shell (110) is provided with a mounting end, and the other end of the shell (110) is provided with a connecting end, and the mounting end and the connecting end are communicated with the assembling cavity (111). The fiber positioning assembly (120) comprises a fiber array (121) and a pushing block (122), the pushing block (122) is fixed with the fiber array (121), the fiber positioning assembly (120) is arranged in the assembling cavity (111), so that the coupling end (1211) of the fiber array (121) is exposed from the connecting end, and the pushing block (122) is gap-fitted with the assembling cavity (111) in the directions of X-axis, Y-axis and Z-axis, the direction of the X-axis is the extending direction of the coupling end (1211), and the direction of the Z-axis is perpendicular to the upper surface of the fiber array (121) close to the coupling end (1211).

2. The optical fiber interface device of claim 1, wherein, The pushing assembly (130) comprises a fork tail piece (131) and a pushing elastic piece (132) connected with each other, one end of the pushing assembly (130) can pass through the mounting end, so that the pushing elastic piece (132) is abutted with the pushing block (122) in the direction of the X-axis, and the fork tail piece (131) is locked with the shell (110). The connecting locking unit (200) comprises a connecting sleeve (210), a needle positioning assembly and two pressing elastic pieces (220), the pressing elastic pieces (220) are arranged on the inner side upper surfaces of the connecting sleeve (210), the pressing elastic pieces (220) are arranged in one-to-one correspondence with the shells (110), two shells (110) can be relatively inserted into the two ends of the connecting sleeve (210), so that the pressing elastic pieces (220) are abutted with the upper surfaces of the fiber arrays (121) close to the coupling ends (1211), the needle positioning assembly comprises a connecting base plate (230) and an insertion needle (240), the connecting base plate (230) is mounted on the inner side lower surface of the connecting sleeve (210), the insertion needle (240) is arranged in the limiting part (231) of the connecting base plate (230), the lower surfaces of the two fiber arrays (121) close to the coupling ends (1211) are provided with positioning grooves (1212) for clamping the insertion needle (240), and the insertion needle (240) and the positioning grooves (1212) can relatively slide in the direction of the X-axis until the two coupling ends (1211) are butted. The connecting sleeve (210) and the shell (110) are selectively locked.

3. The optical fiber interface device of claim 1, wherein, The pressing elastic piece (220) is arranged as an arc-shaped elastic sheet, the connecting end of the shell (110) is hollowed out at the upper surface close to the coupling end (1211), and the outer arc surface of the arc-shaped elastic sheet abuts against the upper surface of the optical fiber array (121) close to the coupling end (1211).

4. The optical fiber interface device of claim 3, wherein, The upper surface of the optical fiber array (121) close to the coupling end (1211) is provided with a pit, and the outer arc surface of the arc-shaped elastic sheet is in contact with the pit.

5. The fiber optic mating device of claim 3, wherein, The arc radius of the arc-shaped elastic sheet is 20-30 mm, and the elastic force between the arc-shaped elastic sheet and the optical fiber array (121) is 10-20 N.

6. The fiber optic mating device of claim 1, wherein, The optical fiber positioning assembly (120) further comprises a positioning plate (123) fixed to the bottom of the optical fiber array (121), the positioning plate (123) is provided with a slot (1231), and the positioning plate (123) is provided with a trumpet-shaped opening at the end of the slot (1231), and the insertion pin (240) is selectively placed in the slot (1231).

7. The fiber optic mating device of claim 1, wherein, The connecting base plate (230) and the connecting sleeve (210) are detachably connected.

8. The fiber optic mating device of claim 1, wherein, The limiting part (231) is protruded on both sides of the insertion pin (240), the connecting base plate (230) is provided with a placing groove (232), and the insertion pin (240) is placed in the placing groove (232).

9. The fiber optic mating device of claim 1, wherein, The tolerance of the push block (122) and the shell (110) along the X-axis direction is 0.15-0.25 mm, and the tolerance of the push block (122) and the shell (110) along the Y-axis and Z-axis directions is 0.01-0.03 mm.

10. The fiber optic mating device of claim 1, wherein, The butt joint tolerance of the two shells (110) in the Y-axis direction is 0.002-0.01 mm.

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