An expanded beam fiber contact and an expanded beam fiber connector using the same

Abstract

The application belongs to the technical field of connectors and specifically relates to an expanded-beam fiber contact and an expanded-beam fiber connector using the contact, wherein the connector comprises a plug and a socket which are mutually inserted, the socket is provided with a contact I, the plug is provided with a contact II, the contact I and the contact II are the expanded-beam fiber contact, the expanded-beam fiber contact comprises an outer shell, a front end of the outer shell is provided with an inner flange, a front end of the inner flange is provided with an inner ceramic pin and an outer ceramic pin, the outer ceramic pin is sleeved on the inner ceramic pin, a hole in the inner ceramic pin is provided with an optical fiber, and a hole in the outer ceramic pin is provided with a lens. After the connector is docked in place, the gap between the contact end faces of the plug and the socket is greater than 0, there is no spring in the contact, the contact will not produce a back-off when the connector is docked, so that the bending state of the optical cable in the connector will not change with the docking of the connector, and the optical performance stability of the connector can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of connector technology, specifically relating to a fiber optic expander contact and a fiber optic expander connector using the contact. Background Technology

[0002] Existing expander-type fiber optic connectors incorporate springs within the contacts. During connector mating, the pins at the socket and plug ends press together, causing the contacts to retract within the connector. This compression of the springs can lead to bending of the fiber at the connector's tail end, or a change in the fiber's bending state within the connector. This can easily affect the fiber's optical performance, resulting in connector optical instability. To achieve connector miniaturization, the space at the connector's tail end is very small. When the fiber is compressed, the lack of buffer space within the connector causes bending and deformation, affecting the connector's optical performance. To prevent fiber bending, the connector's tail end space is typically set relatively large to allow for fiber displacement, which hinders connector miniaturization. Furthermore, even if the fiber shifts without bending, its inherent state can still change, impacting the connector's optical performance. Summary of the Invention

[0003] To address the technical problem of optical fiber bending affecting optical performance in the aforementioned connector, this invention provides a fiber optic expander contact and a fiber optic expander connector using the contact.

[0004] The objective of this invention is achieved through the following technical solution. The fiber optic expander contact according to this invention includes a housing. An inner flange is provided at the front end of the housing. An inner ceramic ferrule and an outer ceramic ferrule are provided at the front end of the inner flange. The inner cavity of the inner flange has, from front to back, an outer ceramic ferrule mounting hole and an inner ceramic ferrule mounting hole. The rear end of the inner ceramic ferrule is disposed within the inner ceramic ferrule mounting hole, and the rear end of the outer ceramic ferrule is disposed within the outer ceramic ferrule mounting hole. The outer ceramic ferrule is sleeved on the inner ceramic ferrule. An optical fiber passes through the inner hole of the inner ceramic ferrule, and a lens is provided within the inner hole of the outer ceramic ferrule, the lens being located at the front end of the inner ceramic ferrule.

[0005] Compared with the prior art, the advantages of the present invention are:

[0006] The contact has a lens at the front end of the inner ceramic pin. The light signal is emitted after passing through the inner ceramic pin and is transmitted in parallel after passing through the lens, so that the light signal can be accurately transmitted even if the contact does not make contact with the adapter contact.

[0007] Furthermore, the front end of the outer shell is provided with a constricted end, and after the constricted end is closed, the cavity at the front end of the outer shell forms a floating cavity; the outer wall of the inner flange is provided with a floating boss, and after the inner flange is set at the front end of the outer shell, the floating boss is placed in the floating cavity, so that the inner flange is movably set at the front end of the outer shell.

[0008] Compared with the prior art, the advantages of the present invention are:

[0009] This allows the mating ends of the contacts to float, ensuring that the contacts can be smoothly mated.

[0010] Furthermore, the outer wall of the inner flange is provided with an anti-rotation key, and the wall of the outer shell is provided with an anti-rotation keyway, with the anti-rotation key nested in the anti-rotation keyway.

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] The anti-rotation single key and anti-rotation keyway work together to prevent the internal optical fiber from being twisted and damaged.

[0013] Furthermore, there is a gap between the rear end face of the lens and the front end face of the inner ceramic pin.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] When the lens assembly, consisting of a lens and an outer ceramic pin, is mounted on the pin assembly, consisting of an inner ceramic pin, an inner flange, and a housing, the gap prevents damage to the inner ceramic pin, outer ceramic pin, and lens during insertion. The gap also provides cushioning during contact insertion, preventing damage to these components from impacts.

[0016] A fiber optic expander connector includes a plug and a socket that are interlocked. The socket contains a contact I and the plug contains a contact II. Both contact I and contact II are fiber optic expanders. After the plug and socket are interlocked, the distance between the front end face of contact I and the front end face of contact II is greater than 0.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] After the connector of the present invention is properly mated, the gap between the contact end faces of the plug and the socket is >0, there is no spring inside the contact, and the contact end faces of the plug and the socket do not contact each other. When the connector is mated, the contact will not retract, so that the bending state of the optical cable inside the connector will not change with the mating of the connector, which can effectively improve the stability of the optical performance of the connector.

[0019] Furthermore, the plug is provided with an inner shell component, which includes an inner shell. The inner shell has a contact mounting hole II for mounting contact II. A ceramic sleeve is provided in the front end cavity of the inner shell. The front end of contact II is located in the ceramic sleeve. After the plug and socket are inserted together, the front end of contact I in the socket is inserted into the ceramic sleeve.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] By using ceramic sleeves, after the two contacts are inserted, the lenses of the two contacts can be aligned, ensuring accurate signal transmission.

[0022] Furthermore, the inner wall of the contact mounting hole II is provided with a contact key guide groove II extending axially, and the anti-rotation key on the contact II is nested in the contact key guide groove II.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] By cooperating with the anti-rotation single key and the single key guide groove II of the contact element, the contact element II is prevented from rotating inside the plug, thereby preventing the optical fiber from twisting and being damaged.

[0025] Furthermore, a positioning spring II is nested inside the contact mounting hole II, and the contact II passes through the positioning spring II.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] The positioning spring II allows the contact element II to be elastically positioned inside the plug, ensuring that the contact element II can float in all directions.

[0028] Furthermore, a splined housing component is provided on the outer side of the inner housing component for axially interlocking the front end of the plug with the front end of the socket.

[0029] Compared with the prior art, the advantages of the present invention are:

[0030] By manipulating the splined housing, the plug and socket are smoothly inserted.

[0031] Furthermore, the socket includes a socket housing, and the socket housing is provided with a contact mounting hole I for setting a contact I. A positioning spring I is nested in the contact mounting hole I, and the contact I passes through the positioning spring I.

[0032] Compared with the prior art, the advantages of the present invention are:

[0033] The positioning spring I allows the contact element I to be elastically positioned within the socket, ensuring that the contact element I can float in all directions.

[0034] Furthermore, the inner wall of the contact mounting hole I is provided with a contact key guide groove I extending axially, and the anti-rotation key on the contact I is nested in the contact key guide groove I.

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] By cooperating with the anti-rotation single key and the single key guide groove I of the contact element, the contact element I is prevented from rotating inside the plug, thereby preventing the optical fiber from twisting and being damaged.

[0037] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0038] Figure 1a This is a cross-sectional view of an embodiment of an expanded optical fiber contact according to the present invention;

[0039] Figure 1b for Figure 1a A schematic diagram of its external shape;

[0040] Figure 1c for Figure 1a A three-dimensional schematic diagram;

[0041] Figure 2a for Figure 1a Front view of the inner flange;

[0042] Figure 2b for Figure 2a A sectional view;

[0043] Figure 2c for Figure 2a The left view;

[0044] Figure 2d for Figure 2a A three-dimensional schematic diagram;

[0045] Figure 3a for Figure 1a Cross-sectional view of the inner and outer shells;

[0046] Figure 3b for Figure 3a The front view;

[0047] Figure 3c for Figure 3a A three-dimensional schematic diagram;

[0048] Figure 4a for Figure 1a A cross-sectional view of the middle lens component;

[0049] Figure 4b for Figure 4a A schematic diagram of its external shape;

[0050] Figure 5a for Figure 1a Cross-sectional view of the center pin component;

[0051] Figure 5b for Figure 1a Front view of the center pin component;

[0052] Figure 6a This is a cross-sectional view of the socket in an embodiment of the expanded fiber optic connector of the present invention;

[0053] Figure 6b for Figure 6a The front view;

[0054] Figure 6c for Figure 6b The left view;

[0055] Figure 6d for Figure 6a A three-dimensional schematic diagram;

[0056] Figure 7a for Figure 6a A cross-sectional view of the socket housing;

[0057] Figure 7b for Figure 7a The right view;

[0058] Figure 7c for Figure 7a The left view;

[0059] Figure 7d for Figure 7a A three-dimensional schematic diagram;

[0060] Figure 8a This is a cross-sectional view of the plug in an embodiment of a beam-expanding fiber optic connector according to the present invention;

[0061] Figure 8b for Figure 8a The left view;

[0062] Figure 8c for Figure 8a A three-dimensional schematic diagram;

[0063] Figure 9a for Figure 8a Cross-sectional view of the inner shell component;

[0064] Figure 9b for Figure 9a The left view;

[0065] Figure 9c for Figure 9a A three-dimensional schematic diagram;

[0066] Figure 10 This is a schematic diagram of the connection between the plug and the socket in an embodiment of the expanded fiber optic connector of the present invention.

[0067] [Attached image labels]

[0068] 1-Lens,

[0069] 2-External ceramic pin,

[0070] 3-Inner ceramic insert,

[0071] 4-Inner flange,

[0072] 401 - Internal ceramic pin mounting hole,

[0073] 402 - External ceramic pin mounting hole,

[0074] 403 - Anti-single-key conversion

[0075] 404 - Floating Boss

[0076] 5-Outer shell,

[0077] 501 - Finishing end

[0078] 502 - Optical Fiber Crimping Terminal

[0079] 503 - Stop Step

[0080] 504 Anti-rotation keyway

[0081] 505-Floating Cavity

[0082] 6-Crimping sleeve,

[0083] 7-Socket housing,

[0084] 701-Contact mounting hole I,

[0085] 702-Contact element single key guide groove I,

[0086] 703-Matching cavity,

[0087] 8-Sealing ring,

[0088] 9-Contact I,

[0089] 10-Positioning spring I,

[0090] 11-Sealing body I,

[0091] 12-Spline housing component,

[0092] 13-Inner shell components,

[0093] 131-Ceramic sleeve.

[0094] 132 - Metal casing,

[0095] 1321-Contact mounting hole II,

[0096] 1322-Contact element single key guide groove II,

[0097] 133-Positioning Spring II,

[0098] 134-Sealing Body II,

[0099] 14-Contact II,

[0100] 15-Gap. Detailed Implementation

[0101] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0102] An embodiment of the fiber optic expander contact of the present invention, such as... Figures 1a to 5b As shown. The contact element includes a lens 1, an outer ceramic pin 2, an inner ceramic pin 3, an inner flange 4, a housing 5, and a wire clamping sleeve 6. The description will focus on the mating end of the contact element as the front end and the other end as the rear end.

[0103] The front end of the outer casing 5 is a tapered end 501 with a thin wall thickness. After the inner flange 4 is inserted into the outer casing 5, the tapered end 501 is tapered, forming a floating cavity 505 in the cavity at the front end of the outer casing 5, which restricts the inner flange 4 to float within the outer casing 5. The rear end of the outer casing 5 is an optical cable crimping end 502. The optical cable crimping end 502 is fitted with a crimping sleeve 6. After the optical cable is connected to the optical cable crimping end 502, the crimping sleeve 6 is used to crimp the optical cable crimping end 502, thereby fixing the optical cable to the outer casing 5.

[0104] The inner flange 4 has an outer ceramic pin mounting hole 402 and an inner ceramic pin mounting hole 401 arranged sequentially from front to back. The diameter of the outer ceramic pin mounting hole 402 is larger than the diameter of the inner ceramic pin mounting hole 401. The rear end of the outer ceramic pin 2 is inserted into the outer ceramic pin mounting hole 402, and the rear end of the inner ceramic pin 3 is inserted into the inner ceramic pin mounting hole 401.

[0105] The inner flange 4 has a floating boss 404 protruding from its outer wall, and the inner cavity at the front end of the outer shell 5 has a stopping step 503. After the inner flange 4 is inserted into the outer shell 5, the stopping step 503 stops the floating boss 404 from moving backward. The floating boss 404 is located between the constricted end 501 of the outer shell 5 and the stopping step 503, and the outer diameter of the floating boss 404 is slightly smaller than the inner diameter of the outer shell 5, so that the floating boss 404 can float radially. The distance between the constricted end 501 and the stopping step 503 is slightly larger than the axial length of the floating boss 404, so as to prevent the floating boss 404 from getting stuck. After the constriction end 501 is closed, a floating cavity 505 is formed between the stop step 503 and the constriction end 501. The constriction end 501 stops the floating boss 404 forward, preventing the inner flange 4 from coming out of the outer shell 5, so that the floating boss 404 can be radially floating and disposed within the outer shell 5. The floating boss 404 is movably disposed within the floating cavity 505, thereby allowing the inner flange 4 to float and be disposed within the outer shell 5. The inner flange 4 is provided with an outer ceramic pin 2 and an inner ceramic pin 3, so that the mating ends of the contact parts can float, facilitating mating.

[0106] A single anti-rotation key 403 is provided on one side of the floating boss 404, and an anti-rotation keyway 504 is provided at the front end of the housing 5, extending rearward from the front end of the housing 5. When the inner flange 4 is inserted into the housing 5, the anti-rotation key 403 is inserted into the anti-rotation keyway 504 to prevent the inner flange 4 from rotating when it floats, thereby preventing damage to the optical fiber.

[0107] The inner ceramic pin 3 is inserted into the outer ceramic pin 2. A cavity is left between the front end face of the inner ceramic pin 3 and the front end face of the outer ceramic pin 2. The lens 1 is nested in the front end of the inner hole of the outer ceramic pin 2. A gap 15 is left between the lens 1 and the front end face of the inner ceramic pin 3. When the lens component composed of the lens 1 and the outer ceramic pin 2 is installed on the pin component composed of the inner ceramic pin 3, the inner flange 4, and the outer shell 5, the gap 15 prevents the inner ceramic pin 3, the outer ceramic pin 2, and the lens 1 from being damaged by impact during insertion. When the contact parts are inserted, the gap 15 provides a buffer and can also prevent the above-mentioned components from being damaged by impact.

[0108] The assembly sequence of the contact components is as follows:

[0109] a. Attach lens 1 to the front end of the inner hole of the outer ceramic pin 2 to form a lens assembly. (Example:) Figure 4a , Figure 4b As shown.

[0110] b. Install and fix the inner ceramic insert 3 inside the inner flange 4, and inject adhesive into the inner flange 4. Install the inner flange 4 at the front end of the outer shell 5, and then limit the opening 501 of the outer shell 5 to confine the inner flange 4. Figure 5a , Figure 5bAt the indicated location, the inner flange 4 at the front end can slightly deflect and move radially after the joint is closed. The optical cable is inserted into the inner flange 4, with the optical fiber inserted into the inner hole of the inner ceramic ferrule 3. The adhesive is then cured, and the end faces of the optical fiber ferrules (including the front end face of the optical fiber and the front end face of the inner ceramic ferrule 3) are ground and polished. After applying an anti-reflection coating, the ferrule assembly is formed, as shown below. Figure 5a , Figure 5b As shown.

[0111] c. Assemble the lens component and the pin component together to form a contact element, such as... Figures 1a to 1c As shown, the outer ceramic pin 2 of the lens component can be bonded into the outer ceramic pin mounting hole 402. This completes the assembly of the contact components.

[0112] An embodiment of the present invention provides a beam-expanding fiber optic connector, such as... Figures 6a to 9c As shown, the connector includes a plug and a socket, with the mating ends of the plug and socket being described as the front end.

[0113] The socket includes a socket housing 7, the front end of which is provided with a mating cavity 703, and the rear wall edge of the mating cavity 703 is nested with a sealing ring 8.

[0114] The socket housing 7 has a contact mounting hole I 701 in the middle, and a contact I 9 is provided in the contact mounting hole I 701. The contact I 9 is the contact in the above embodiment. The lens component of the contact I 9 is located in the mating cavity 703. The outer housing 5 of the contact I 9 stops forward on the step in the contact mounting hole I 701 to achieve axial positioning of the contact I 9.

[0115] A positioning spring I 10 is installed inside the contact mounting hole I 701. The contact element I 9 passes through the positioning spring I 10. The positioning spring I 10 cooperates with the outer shell 5 of the contact element I 9, so that the contact element I 9 is elastically maintained in the middle position within the contact mounting hole I 701. This ensures that there is a gap between the outer wall of the inner flange 4 and the inner wall of the contact mounting hole I 701 in all radial directions, allowing the inner flange 4 to float in all directions. The positioning spring I 10 simultaneously abuts against the inner wall of the contact mounting hole I 701 and the outer wall of the outer shell 5, thus fixing the contact element I 9 in the contact mounting hole I 701.

[0116] The inner wall of the contact mounting hole I 701 is provided with a contact key guide groove I702 extending axially. In the contact I 9, the anti-rotation key 403 on the outer wall of the inner flange 4 extends radially out of the anti-rotation keyway 504. When the contact I 9 is inserted into the socket housing 7, the anti-rotation key 403 is inserted into the contact key guide groove I702, realizing the anti-rotation fit between the socket housing 7 and the contact I 9.

[0117] A sealing body I 11 is provided at the tail of the socket housing 7, and the sealing body I 11 is fixed to the tail of the socket housing 7 by adhesive bonding.

[0118] The assembly sequence of the socket is as follows:

[0119] a. Install the positioning spring I10 into the socket housing 7.

[0120] b. Attach the sealing ring 8 and the sealing wire body 11 to the inside of the socket housing 7 to complete the socket assembly. In use, first insert the jumper wire of contact I 9 into the socket.

[0121] c. Insert the jumper wire of contact I 9 into the socket.

[0122] The plug includes a splined housing component 12, an inner housing component 13, and a contact II 14. The splined housing component 12 is a prior art splined housing component and will not be described in detail here. The contact II 14 is the contact in the above embodiment.

[0123] The inner housing component 13 is disposed within the spline housing component 12. The inner housing component 13 includes a ceramic sleeve 131, a metal housing 132, a positioning spring II 133, and a sealing body II 134. In this embodiment, the inner housing component is made of metal housing 132.

[0124] A ceramic sleeve 131 is nested in the front end cavity of the metal housing 132, and the ceramic sleeve 131 is stopped rearward on the corresponding step inside the metal housing 132. The rear end cavity of the metal housing 132 is provided with a contact mounting hole II 1321 for mounting a contact II 14. A positioning spring II 133 is nested in the contact mounting hole II 1321, and the contact II 14 passes through the positioning spring II 133. The positioning spring II 133 cooperates with the outer housing 5 of the contact II 14, so that the contact II 14 is elastically maintained in the middle position within the contact mounting hole II 1321, so that the outer wall of the inner flange 4 and the inner wall of the contact mounting hole II 1321 have gaps in all radial directions, realizing the floating of the inner flange 4 in all radial directions. Positioning spring II 14 simultaneously abuts against the inner wall of contact mounting hole II 1321 and the outer wall of housing 5, thereby fixing contact II 14 in contact mounting hole II 1321.

[0125] The lens component at the front end of contact II 14 is inserted into the ceramic sleeve 131. There is a gap between the ceramic sleeve 131 and the metal housing 132 it is in, so that the ceramic sleeve 131 can float with contact II 14 without affecting the normal floating of contact II 14.

[0126] The inner wall of the contact mounting hole II 1321 is provided with a contact key guide groove II 1322 extending axially. In the contact II 14, the anti-rotation key 403 on the outer wall of the inner flange 4 extends out of the anti-rotation keyway 504. When the contact II 14 is inserted into the metal housing 132, the anti-rotation key 403 is inserted into the contact key guide groove II 1322, thereby achieving anti-rotation engagement between the metal housing 132 and the contact II 14.

[0127] A sealing body II 134 is provided on the rear end face of the metal housing 132, and the sealing body II 134 is fixed to the tail of the metal housing 132 by adhesive bonding.

[0128] The assembly sequence of the plug is as follows:

[0129] a. Install the ceramic sleeve 131 into the inner cavity of the front end of the metal housing 132, then install the positioning spring II 133 into the contact mounting hole II 1321 of the metal housing 132, and then attach the sealing body II 134 to the tail end of the metal housing 132 to complete the assembly of the inner housing component 13.

[0130] When in use, first insert the jumper wire of contact II 14 into the inner housing component 13.

[0131] b. Attach the inner housing component 13 to the spline housing component 12 to complete the plug assembly.

[0132] In this embodiment, the plug and socket use the same contact element. The contact element is centered by a corresponding positioning spring to ensure that when the plug and socket are inserted, the contact element I 9 in the plug and the contact element II 14 in the socket can be aligned, and the floating structure function is fully utilized so that the plug and socket can float in all radial directions.

[0133] The plug and socket are inserted into each other, such as... Figure 10 As shown, the plug and socket are inserted into each other along the mating direction via the spline housing component 12. The plug is inserted into the mating cavity 703 of the socket. The front end of contact I 9 in the socket passes through the front end of the spline housing component 12 and is inserted into the ceramic sleeve 131 of the inner housing component 13. Both contact I 9 and contact II 14 are located within the ceramic sleeve 131. The ceramic sleeve 131 restricts the position of contact I 9 and contact II 14, preventing positional deviations caused by connector floating during mating, ensuring alignment of the two contacts, and thus ensuring coaxial transmission of the optical signal. Even if the ceramic sleeve 131 floats, it can also cause the two contacts to float simultaneously, maintaining accurate transmission of the optical signal.

[0134] After the connector is properly connected, Figure 10As shown, the front end face of contact I 9 is inside the ceramic sleeve 131, and the distance between it and the front end face of contact II 14 is greater than 0, that is, the gap between the contact end faces of the plug and the socket is greater than 0. In this invention, there is no spring inside the contact, and the contact end faces of the plug and the socket do not contact each other. When the connector is mated, the contact will not retract, so that the bending state of the optical cable inside the connector will not change with the connector mating, which can effectively improve the optical performance stability of the connector.

[0135] In summary, this invention, while enabling the connector to have a floating function (which allows for smooth mating), keeps the connector contacts coaxial and avoids changes in the bending state of the optical fiber, thus ensuring good optical performance of the optical fiber connector.

[0136] When designing connectors, there is no need to consider the retraction of optical cables, so the tail space can be designed to be smaller and the connector tail accessories can be designed to be shorter, thus achieving connector miniaturization.

[0137] In another embodiment of the fiber optic connector of the present invention, based on the above embodiment, the metal housing 132 can be replaced with an inner housing made of other materials.

[0138] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fiber optic expander contact, comprising a housing (5), characterized in that: The front end of the outer shell (5) is provided with an inner flange (4), and the front end of the inner flange (4) is provided with an inner ceramic pin (3) and an outer ceramic pin (2). The inner cavity of the inner flange (4) is provided with an outer ceramic pin mounting hole (402) and an inner ceramic pin mounting hole (401) from front to back. The rear end of the inner ceramic pin (3) is located in the inner ceramic pin mounting hole (401), and the rear end of the outer ceramic pin (2) is located in the outer ceramic pin mounting hole (402). The outer ceramic pin (2) is sleeved on the inner ceramic pin (3). An optical fiber is inserted in the inner hole of the inner ceramic pin (3), and a lens (1) is provided in the inner hole of the outer ceramic pin (2). The lens (1) is located at the front end of the inner ceramic pin (3). The front end of the outer shell (5) is provided with a tapered end (5). 01), the inner cavity at the front end of the outer shell (5) is provided with a stop step (503). After the closing end (501) is closed, a floating cavity (505) is formed between the stop step (503) and the closing end (501). The outer wall of the inner flange (4) is provided with a floating boss (404). After the inner flange (4) is set at the front end of the outer shell (5), the floating boss (404) is placed in the floating cavity (505). The stop step (503) stops the floating boss (404) backward, and the closing end (501) stops the floating boss (404) forward to prevent the inner flange (4) from falling out of the outer shell (5), so that the floating boss (404) can float in the outer shell (5), and thus the inner flange (4) floats in the front end of the outer shell (5).

2. The fiber optic expander contact according to claim 1, characterized in that: The outer wall of the inner flange (4) is provided with an anti-rotation key (403), and the wall of the outer shell (5) is provided with an anti-rotation keyway (504), with the anti-rotation key (403) nested in the anti-rotation keyway (504).

3. The fiber optic expander contact according to claim 1, characterized in that: There is a gap (15) between the rear end face of the lens (1) and the front end face of the inner ceramic pin (3).

4. A fiber optic connector for expanding beams, comprising a plug and a socket that interlock, characterized in that: The socket is provided with contact I (9), and the plug is provided with contact II (14). Contact I (9) and contact II (14) are both the expanded fiber optic contact as described in any one of claims 1-3. After the plug and socket are inserted, the distance between the front end face of contact I (9) and the front end face of contact II (14) is greater than 0. The plug is provided with an inner shell component (13). The inner shell component (13) includes an inner shell. The inner shell is provided with a contact mounting hole II (1321) for installing contact II (14). The front end cavity of the inner shell is provided with a ceramic sleeve (131). The front end of contact II (14) is located in the ceramic sleeve (131). There is a gap between the ceramic sleeve (131) and the inner shell, so that the ceramic sleeve (131) can float with contact II (14). After the plug and socket are inserted, the front end of contact I (9) in the socket is inserted into the ceramic sleeve (131) so that the front end of contact I (9) and the front end of contact II (14) are both in the ceramic sleeve (131) to ensure that contact I (9) and contact II (14) are aligned.

5. A fiber optic connector for expanding beams according to claim 4, characterized in that: The inner wall of the contact mounting hole II (1321) is provided with a contact key guide groove II (1322) extending axially, and the anti-rotation key (403) on the contact II (14) is nested in the contact key guide groove II (1322).

6. A fiber optic connector for expanding beams according to claim 4, characterized in that: The positioning spring II (133) is nested inside the mounting hole II (1321) of the contact element, and the contact element II (14) passes through the positioning spring II (133).

7. A fiber optic connector for expanding beams according to claim 4, characterized in that: The outer side of the inner housing component (13) is provided with a spline housing component (12) for axially interlocking the front end of the plug with the front end of the socket.

8. A fiber optic connector for expanding beams according to claim 4, characterized in that: The socket includes a socket housing (7), and the socket housing (7) is provided with a contact mounting hole I (701) for setting a contact I (9). A positioning spring I (10) is nested in the contact mounting hole I (701), and the contact I (9) passes through the positioning spring I (10).

9. A fiber optic connector for expanding beams according to claim 8, characterized in that: The inner wall of the contact mounting hole I (701) is provided with a contact key guide groove I (702) extending axially, and the anti-rotation key (403) on the contact I (9) is nested in the contact key guide groove I (702).

Images