Optical fiber air-tight seal contact element and adapter connector

Abstract

The invention belongs to the technical field of connectors, and particularly relates to an optical fiber air-tight seal contact element and an adapter connector, the optical fiber air-tight seal contact element comprises an adapter flange plate, an outer flange plate and a contact pin component, the contact pin component comprises an inner flange plate and a ceramic contact pin inserted in the inner flange plate, the outer wall of the inner flange plate is convexly provided with a plug bush part, the end part of the outer flange plate is a closing end, and the ceramic contact pin is inserted into the ceramic contact pin. After the closing end is closed, an insertion sleeve cavity is formed in the end part of the outer flange plate, and after the inner flange plate is inserted into the end part of the outer flange plate, the insertion sleeve part is arranged in the insertion sleeve cavity, so that the pin component is movably arranged at the end part of the outer flange plate; an optical fiber penetrates through the adapter flange plate, the interior of the adapter flange plate realizes air-tight sealing through glue injection, the optical fiber is positioned, and the two ends of the optical fiber penetrate through the outer flange plate and the inner flange plate at the corresponding ends and then are arranged in the inner hole of the ceramic contact pin in a penetrating manner. According to the invention, while the insertion structure is prevented from being damaged, the optical performance of a product is improved, and air-tight sealing can be ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors, and in particular relates to an optical fiber airtight sealing contact piece and a transfer connector. Background Art

[0002] In the existing J599III series fiber optic airtight adapter connectors or J599A8 series fiber optic airtight adapter connectors, in order to achieve airtightness, the contact pieces need to be bonded or fixed in the adapter connector by other means. Therefore, at least one end of the contact pieces at both ends of the adapter connector cannot move. If the contact pieces cannot move, when the plug connector and the adapter connector are plugged in, the plug contact pieces and the adapter connector contact pieces are rigidly docked, without floating space. In the process of turning the nut on the plug connector or using the plug-in locking structure such as the buckle, push-pull structure, etc. to plug and lock the plug connector and the adapter connector, the ceramic sleeve of the plug connector and the ceramic pin of the adapter connector are subjected to shear force, which leads to increased loss of the ceramic sleeve and ceramic pin during plugging, and even the ceramic sleeve is broken, affecting the optical performance of the connector.

[0003] For example, in the patent number 201810175069.6 and the name of the invention, a single-mode optical fiber sealed connector, the pin assembly includes a pin housing, a ceramic pin and a single-mode optical fiber. The ceramic pin is installed at the left and right ends of the pin housing by crimping. A through hole with a circular cross-section is provided in the pin housing. The single-mode optical fiber is passed through the ceramic pin and the through hole. The single-mode optical fiber is fixed to the ceramic pin connector by bonding. Although precise docking and airtightness can be guaranteed, the ceramic pin and ceramic sleeve are easily damaged during insertion, affecting the optical performance of the connector. Summary of the invention

[0004] In order to solve the technical problem that the pin component of the above-mentioned adapter connector cannot slide, thus affecting the optical performance of the connector, the present invention provides an optical fiber airtight sealing contact and an adapter connector.

[0005] The objective of the present invention is achieved by adopting the following technical scheme. According to the optical fiber airtight contact part proposed by the present invention, it includes a transfer flange, an outer flange arranged at both ends of the transfer flange, and a pin component inserted into the end of the outer flange. The pin component includes an inner flange and a ceramic pin inserted into the inner flange. The outer wall of the inner flange is provided with a sleeve portion. The end of the outer flange is a closed end. After the closed end is closed, the end of the outer flange forms a sleeve cavity. After the inner flange is inserted into the end of the outer flange, the sleeve portion is placed in the sleeve cavity so that the pin component is movably arranged at the end of the outer flange. The transfer flange is provided with an optical fiber. The interior of the transfer flange is fixed by injecting glue to achieve airtightness between the two ends of the transfer flange. The two ends of the optical fiber pass through the outer flange and the inner flange at the corresponding ends and then pass through the inner hole of the ceramic pin.

[0006] Compared with the prior art, the present invention is beneficial in that:

[0007] In the contact structure of the present invention, the pin components at both ends are limited by closing means with the corresponding outer flanges. The pin components can move at the ends of the outer flanges so that the pin components can swing relative to the adapter connector. When shear force occurs when the ceramic sleeve and the ceramic pin are plugged in, the ceramic pin swings to reduce the shear force on the ceramic sleeve and the ceramic pin, thereby avoiding damage to the plug-in structure and further avoiding affecting the optical performance. The inside of the adapter flange is coated with glue to achieve an airtight seal with the optical fiber, which not only improves the optical performance of the product while avoiding damage to the plug-in structure, but also ensures airtightness.

[0008] Furthermore, the adapter flange has an optical fiber bonding hole in the middle, and bundle tube bonding holes connected to the optical fiber bonding hole are provided at both ends. The optical fiber is inserted into the optical fiber bonding hole and the bundle tube bonding hole, and a bundle tube is inserted into the bundle tube bonding hole, and the bundle tube is sleeved on the optical fiber.

[0009] Furthermore, after the optical fibers are passed through the optical fiber bonding holes and the bundle tube bonding holes of the adapter flange, glue is injected, and after the glue is injected, the bundle tubes are passed through the bundle tube bonding holes. After the glue is cured, the air tightness of the adapter flange is checked, and after the air tightness is qualified, the outer flanges are installed at both ends of the adapter flange.

[0010] Compared with the prior art, the present invention is beneficial in that:

[0011] Install the external flange only after confirming that the air tightness is qualified to avoid overall rework due to unqualified air tightness.

[0012] Furthermore, after the ceramic pin is inserted into the inner flange, glue is injected into the pin component. After the glue is injected, the inner flange is inserted into the end of the outer flange, and the optical fiber and the bundle tube sleeved on the outside of the optical fiber are inserted into the pin component at the same time, wherein the optical fiber is inserted into the ceramic pin and the inner flange, and the bundle tube is inserted into the inner flange. After the glue is cured, the bundle tube, the optical fiber and the pin component are fixed.

[0013] Compared with the prior art, the present invention is beneficial in that:

[0014] When closing the opening, the bending degree of the closing can be controlled as needed to leave space for the pin components to move.

[0015] Furthermore, the outer wall of the adapter flange is provided with an O-ring groove and / or a glue injection groove.

[0016] Compared with the prior art, the present invention is beneficial in that:

[0017] The contact piece and the installed housing are sealed by installing an O-ring in the O-ring groove and / or injecting glue in the glue injection groove.

[0018] Furthermore, one end of the outer flange away from the closing end is a threaded connection end for threaded connection with the adapter flange.

[0019] Furthermore, the inner wall of the inner flange is provided with a first limiting step for stopping the ceramic pin forward.

[0020] Compared with the prior art, the present invention is beneficial in that:

[0021] The first limiting step is used to limit the ceramic pin to prevent the ceramic pin from being inserted too much, which causes the inner hole of the ceramic pin to be squeezed and unable to insert the optical fiber.

[0022] Furthermore, an anti-rotation single key is provided on the outer wall of the insert sleeve portion, and correspondingly, an anti-rotation key groove is provided at the end of the outer flange for inserting the anti-rotation single key.

[0023] Compared with the prior art, the present invention is beneficial in that:

[0024] Avoid the contact piece from rotating when it is mated with the plug, thus preventing the optical fiber from breaking.

[0025] Furthermore, an observation hole for observing whether the inner flange is properly inserted is provided on the wall of the outer flange.

[0026] Compared with the prior art, the present invention is beneficial in that:

[0027] During assembly, check through the observation hole whether the inner flange is properly inserted to avoid over-insertion and damage to various parts.

[0028] A transfer connector comprises a shell, a contact inserted into a first contact hole in the shell, the contact being the optical fiber airtight contact. After the contact is inserted into the shell, the end of an outer flange and a pin component are located in an insertion cavity, a pressure plate is installed at the bottom of the insertion cavity, the pin component extends out of the pressure plate, and a fourth limiting step for stopping the end of the outer flange is provided in a second contact hole in the pressure plate for the pin component to pass through.

[0029] Compared with the prior art, the present invention is beneficial in that:

[0030] The contact piece has a pin component with a movable space, which avoids damage to the plug-in component when the adapter connector and the plug connector are plugged in, thereby improving the optical performance.

[0031] Furthermore, a third limiting step is provided on the inner wall of the first contact member hole, and a stopping boss for abutting against the third limiting step is provided on the outer wall of the contact member.

[0032] Compared with the prior art, the present invention is beneficial in that:

[0033] When inserting and installing the contact piece, the contact piece is positioned by the third limiting step, and measurement is not required. The pressure plate can be directly installed when installing the contact piece.

[0034] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is an overall cross-sectional view of an embodiment of an optical fiber airtight sealing contact piece of the present invention when the end is not closed;

[0036] Figure 2a for Figure 1 Cross-sectional view of the inner flange;

[0037] Figure 2b for Figure 2a Side view of

[0038] Figure 2c for Figure 2a Stereoscopic image of

[0039] Figure 3a for Figure 1 Cross-sectional view of the middle and outer flanges;

[0040] Figure 3b for Figure 3a Side view of

[0041] Figure 3c for Figure 3a A top view of

[0042] Figure 3d for Figure 3a Stereoscopic image of

[0043] Figure 4a for Figure 1 Cross-sectional view of the intermediate flange;

[0044] Figure 4b for Figure 4a Side view of

[0045] Figure 4c for Figure 4a A front view of

[0046] Figure 4d for Figure 4a Stereoscopic image of

[0047] Figure 5 for Figure 1 Schematic diagram of installing optical fiber and bundle tube in the transfer flange;

[0048] Figure 6a It is a half-section view of an adapter connector embodiment of the present invention without optical fibers and bundle tubes;

[0049] Figure 6b for Figure 6a Left view of;

[0050] Figure 6c for Figure 6a Right view of;

[0051] Figure 6d for Figure 6a The enlarged schematic diagram of point A in the middle;

[0052] Figure 7a for Figure 6a A partial cross-sectional view of the middle shell;

[0053] Figure 7b for Figure 7a Left view of;

[0054] Figure 7c for Figure 7a Right view of;

[0055] Figure 7d for Figure 7a Stereoscopic image of

[0056] Figure 8 for Figure 6a An enlarged schematic diagram of the part B in the middle after closing.

[0057] [Reference Signs]

[0058] 1-Ceramic pin;

[0059] 2-Inner flange;

[0060] 201-crimping end;

[0061] 202-first limiting step;

[0062] 203-insertion sleeve portion;

[0063] 204-anti-rotation single key;

[0064] 3-External flange;

[0065] 301- closing end;

[0066] 302-threaded connection end;

[0067] 303-anti-rotation keyway;

[0068] 304- observation hole;

[0069] 305-second limiting step;

[0070] 306-insert sleeve cavity;

[0071] 4-0 type ring;

[0072] 5-Adapter flange;

[0073] 501-optical fiber bonding hole;

[0074] 502- beam tube bonding hole;

[0075] 503-O-ring groove;

[0076] 504- glue injection groove;

[0077] 505-external thread;

[0078] 506-stop boss;

[0079] 6-Bundle tube;

[0080] 7- housing;

[0081] 701 - first contact hole;

[0082] 702-the third limiting step;

[0083] 703-pore structure;

[0084] 704-insertion cavity;

[0085] 705-threaded hole;

[0086] 8-Pressing plate;

[0087] 801 - second contact hole;

[0088] 802-the fourth limiting step;

[0089] 9-Contact piece;

[0090] 10- screws;

[0091] 11- Fiber optic. DETAILED DESCRIPTION

[0092] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0093] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0094] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0095] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0096] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0097] The features and performances of an optical fiber airtight contact and a transfer connector of the present invention are further described in detail below in conjunction with the embodiments.

[0098] Embodiment 1 of an optical fiber airtight contact member of the present invention is as follows: Figures 1 to 5 As shown, hereinafter referred to as contact parts.

[0099] The contact piece includes a ceramic pin 1, an inner flange 2, an outer flange 3, a transfer flange 5, and a bundle tube 6. The transfer flange 5 is provided with fixed optical fibers 11 and a bundle tube 6. Both ends of the transfer flange 5 are fixedly connected to the outer flange 3. The end of the outer flange 3 is plugged with a pin component, which can move at the end of the outer flange 3. The pin component includes a ceramic pin 1 and an inner flange 2. The ceramic pin 1 is plugged into the inner flange 2, and the inner flange 2 is plugged into the outer flange 3.

[0100] The inner flange 2 is a tubular body with a through hole inside. One end of the inner flange 2 is a crimping end 201. The inner wall of the inner flange 2 is provided with a first limiting step 202 for limiting the ceramic plug pin 1. After the ceramic plug pin 1 is inserted into the hole of the crimping end 201, the ceramic plug pin 1 abuts against the first limiting step 202. The first limiting step 202 stops the ceramic plug pin 1 forward to ensure that the ceramic plug pin 1 is inserted in the designed position to avoid excessive insertion of the ceramic plug pin 1, which causes the hole of the ceramic plug pin used for inserting the optical fiber to be compressed by the crimping end 201 and cannot smoothly insert the optical fiber. After the ceramic plug pin 1 is inserted in place, the crimping end 201 is crimped onto the ceramic plug pin 1 with a crimping tool to fix the ceramic plug pin 1 to the crimping end 201; or the ceramic plug pin 1 and the hole of the crimping end 201 are interference fit, and the ceramic plug pin 1 is forcefully inserted to fix the ceramic plug pin 1 to the crimping end 201. The outer wall of the inner flange 2 is provided with a plug-in sleeve portion 203. In this embodiment, the plug-in sleeve portion 203 is an annular boss surrounding the outer wall of the inner flange 2. The outer wall of the plug-in sleeve portion 203 is provided with an anti-rotation single key 204.

[0101] The outer flange 3 is a tubular body with a through hole inside. One end of the outer flange 3 is a closing end 301, and the other end is a threaded connection end 302 for threaded connection with the adapter flange 5. The inner wall of the hole of the threaded connection end 302 is provided with a thread. The hole wall thickness of the closing end 301 is relatively thin, which is convenient for closing. After the closing end 301 is closed, a plug-in sleeve cavity 306 is formed. A second limiting step 305 is provided on the inner wall of the outer flange 3 near the closing end 301. The inner flange 2 is inserted into one side of the closing end 301, and the plug-in sleeve portion 203 is pressed against the second limiting step 305. At this time, the crimping end 201 of the inner flange 2 is located on the outer side of the outer flange 3. After the closing end 301 is closed, the sleeve part 203 is placed in the sleeve cavity 306, which can prevent the sleeve part 203 from slipping out of the outer flange 3, and further prevent the inner flange 2 from slipping out of the outer flange 3. At the same time, there is a radial gap between the sleeve part 203 and the inner wall of the outer flange 3 close to the closing end 301, and there is an axial gap between the sleeve part 203 and the inner wall of the closing end 301 when the sleeve part 203 is against the second limiting step 305, which can enable the sleeve part 203 to have space for movement (sliding or swinging, radial movement) between the closing end 301 and the second limiting step 302, thereby allowing the inner flange 2 to move at the end of the outer flange 3.

[0102] The closing end 301 of the outer flange 3 is provided with an anti-rotation key groove 303, and the anti-rotation key groove 303 extends from the end surface of the closing end 301. When the inner flange 2 is inserted into the outer flange 3, the anti-rotation single key 204 is inserted into the anti-rotation key groove 303. When the inner flange 2 moves, the anti-rotation single key 204 moves in the anti-rotation key groove 303 and prevents the inner flange 2 from rotating over a large range in the outer flange 3.

[0103] The wall of the outer flange 3 near the closing end 301 is provided with an observation hole 304 for observing whether the inner flange 2 is inserted in place. When it is observed that it is inserted in place, the closing end 301 can be closed with a closing tool to avoid pressing the closing end 301 on the plug-in sleeve 203 when it is not inserted in place, thereby avoiding that the inner flange 2 has no space for movement. In this embodiment, two observation holes 304 are symmetrically arranged on the outer flange 3, which is convenient for observation from any side during installation.

[0104] The adapter flange 5 is a tubular body, and a fiber bonding hole 501 is provided in the middle of the interior thereof, and bundle tube bonding holes 502 are provided at both ends thereof, which are connected to the fiber bonding hole 501. The fiber bonding hole 501 is used to pass the optical fiber 11 and fix it by injecting glue. The bundle tube bonding hole 502 is used to pass the bundle tube 6 and the optical fiber 11, and the bundle tube 6 is sleeved on the optical fiber 11, and the optical fiber 11, the bundle tube 6, and the adapter flange 5 are bonded and fixed. After bonding and fixing, the optical fiber 11 is sealed and fixed in the adapter flange 5, and the end of the bundle tube 6 is bonded and fixed in the bundle tube bonding hole 502. The bundle tube 6 is simultaneously passed through the corresponding outer flange 3, and the other end thereof is bonded and fixed in the hole of the inner flange 2. The optical fiber 11 extends out of the bundle tube 6 in the inner flange 2 and is passed through the ceramic pin 1. When the pin component moves, the bundle tube 6 and the optical fiber 11 move and deform in the outer flange 3, and the through hole of the outer flange 3 leaves space for the optical fiber 11 and the bundle tube 6 to move.

[0105] The outer wall of the adapter flange 5 is axially distributed with O-ring grooves 503 and glue injection grooves 504. When the contact is inserted into the adapter connector, the seal between the contact and the adapter connector is achieved by nesting the O-ring in the O-ring groove 503, or by injecting glue in the glue injection groove 504 to achieve sealing and bonding fixation with the adapter connector. The outer walls of the two ends of the adapter flange 5 are provided with external threads 505, which are used to be threadedly connected with the internal threads of the threaded connection end 302 of the outer flange 3 to fix the outer flange 3 on the adapter flange 5. In this embodiment, the O-ring grooves 503 and the glue injection grooves 504 are distributed on the stop boss 506 of the outer wall of the adapter flange 5, and the stop boss 506 is an annular boss protruding from the outer wall of the adapter flange 5.

[0106] The assembly sequence of contacts is as follows:

[0107] a. Press the ceramic pin 1 into the inner flange 2 to make a pin component, and fill the cavity in the pin component with glue.

[0108] b. Insert the bare optical fiber into the adapter flange 5, then fill the cavity in the adapter flange 5 with glue, and then insert the bundle tube 6 into the left and right ends of the adapter flange 5, and the bundle tube 6 is simultaneously sleeved on the optical fiber 11; the adapter flange 5, the optical fiber 11, and the bundle tube 6 are bonded together after the injected glue is cured, as shown in FIG. Figure 5 As shown; then check the air tightness of both ends of the adapter flange 5, and proceed to the next step after the air tightness is qualified.

[0109] c. Install the outer flange 3 on the left and right ends of the adapter flange 5 (installed by threaded connection) and tighten them;

[0110] d. Insert the pin component into the closing end 301 of the outer flange 3, and insert the optical fiber 11 and the bundle tube 6 into the pin component. After the glue injected into the pin component is cured, the optical fiber 11, the bundle tube 6 and the pin component are fixed;

[0111] e. Close the outer flange 3 and limit the pin component at the closing end 301 of the outer flange 3; when closing, ensure that the anti-rotation single key 204 on the inner flange 2 cooperates with the anti-rotation key slot 303 of the outer flange 3. After closing, the pin component has a certain movable space relative to the outer flange 3.

[0112] f. Grind and polish both ends of the contact. The contact is now made.

[0113] The above assembly sequence can be adjusted according to specific circumstances.

[0114] In the second embodiment of the optical fiber airtight seal contact of the present invention, the outer flange 3 and the adapter flange 5 in the first embodiment can be integrally arranged, and the structure of the adapter flange 5 is integrated at the opposite ends of the two outer flanges 3. The outer flange 3 and the adapter flange 5 can also be fixedly connected by other connection methods such as gluing.

[0115] In the third embodiment of an optical fiber airtight seal contact of the present invention, based on the first embodiment, the outer wall of the adapter flange 5 may be provided with only an O-ring groove 503 or only a glue injection groove 504 .

[0116] In the fourth embodiment of an optical fiber airtight seal contact of the present invention, based on the first embodiment, the observation hole 304 of the outer flange 3 can be removed, and the pin component can be limited by the second limiting step 305.

[0117] Embodiment 5 of an optical fiber airtight sealing contact of the present invention, based on embodiment 1, can remove the anti-rotation single key 204 on the inner flange 2 and the anti-rotation key groove 303 on the outer flange 3, and replace the plug-in matching structure of the inner flange 2 and the outer flange 3 with a non-rotating body, thereby preventing the rotation of both.

[0118] In the sixth embodiment of an optical fiber airtight seal contact of the present invention, based on the first embodiment, the stop boss 506 on the adapter flange 3 can be removed, and the contact can be fixed by relying on the structure on the adapter connector.

[0119] In other embodiments of an optical fiber airtight contact of the present invention, only an outer flange 3, an inner flange 2, a ceramic pin 1, an optical fiber 11, and a bundle tube 6 may be provided. One end of the outer flange 3 is bonded and fixed to the optical fiber 11 and the bundle tube 6, and the other end is plugged with a pin component. The contact may be used only as a contact of a plug connector or a socket connector, and the ceramic pin 1 may be replaced by a ceramic sleeve.

[0120] An embodiment of a transfer connector of the present invention is as follows Figures 6a to 8 The adapter connector comprises a housing 7, a pressing plate 8, a contact piece 9, and a screw 10, wherein the contact piece 9 is the optical fiber airtight sealing contact piece.

[0121] In the middle position of the inner cavity of the shell 7 is a hole structure 703 integrally set with the shell 7, and a plurality of first contact holes 701 for inserting the contact 9 are distributed on the hole structure 703. The inner wall of the first contact hole 701 is provided with a third limiting step 702. After the contact 9 is inserted into the first contact hole 701 from one end of the shell 7, the stopping boss 506 on the adapter flange 5 abuts against the third limiting step 702, indicating that the contact 9 is inserted in place.

[0122] The inner cavities of the shell at both ends of the hole structure 703 are plug-in cavities 704 . After the contact piece 9 is inserted into place, the end of the outer flange 3 and the pin component are located in the plug-in cavity 704 .

[0123] A threaded hole 705 is provided in the middle of the two end faces of the hole structure 703. After the contact piece 9 is inserted into place, the pressure plate 8 is pressed onto the end face of the hole structure 703, and then the screw 10 is screwed into the threaded hole 705 through the through hole in the center of the pressure plate 8 to fix the pressure plate 8 in the shell 7, thereby fixing the contact piece 9 in the first contact piece hole 702.

[0124] The second contact hole 801 corresponding to the first contact hole 701 is distributed on the pressing plate 8, and the inner wall of the second contact hole 801 is provided with a fourth limiting step 802. After the contact 9 is inserted into the housing 7 and the pressing plate 8 is installed, the end of the outer flange 3 and the pin component are inserted into the corresponding second contact hole 801, and the ceramic pin 1 extends out of the first contact hole 801 for plugging with the ceramic sleeve of the plug. The fourth limiting step 802 has a blocking effect on the closing end 301 of the outer flange 3. When the O-ring 4 is set in the O-ring groove 503 of the adapter flange 5 to seal between the contact and the housing 7, the contact 9 can be prevented from falling off by the blocking of the fourth limiting step 802 of the pressing plate 8. When the sealing and fixing with the housing 7 are achieved by injecting glue into the glue injection groove 504 of the adapter flange 5, the limiting fixation of the contact 9 can be strengthened by the pressing plate 8. The contact member 9 is fixed in the first contact member hole 701 and the second contact member hole 801 as a whole by the third limiting step 702 and the fourth limiting step 802 , so as to ensure that the contact member 9 is firmly installed in the housing 7 .

[0125] In this embodiment, the adapter connector is threadedly connected to the corresponding plug connector through threads on the outer walls of the two ends of the shell 7. In other embodiments, the adapter connector can also be connected to the corresponding plug connector by bayonet connection, push-pull connection or other connection methods.

[0126] The assembly sequence of the adapter connector is as follows:

[0127] a. Put an O-ring 4 on the O-ring groove 503 of the adapter flange 5 of the contact piece (or fill the glue injection groove 504 with sealant, or set the O-ring 4 and the glue injection at the same time);

[0128] b. Install the contact member 9 into the first contact member hole 701 of the housing 7, the stop boss 506 on the adapter flange 5 abuts against the third limit step 702, and the pressure plate 8 is installed on both ends of the housing 7;

[0129] c. Tighten the pressure plate 8 with screws 10, so that the pressure plate 8 blocks the closing end 301 of the outer flange 3 of the contact piece 9, and then cure the glue between the contact piece 9 and the housing 7 to complete the installation of the adapter connector (if only the O-ring 4 is used for assembly, there is no need to cure the glue).

[0130] The current airtight adapter connector needs to glue and fix the contact parts to achieve the airtight function. At least one of the pin parts at both ends of the contact parts cannot move, resulting in that when the plug connector is inserted into the adapter connector, the ceramic sleeve at the plug end and the ceramic pin of the adapter connector are rigidly connected and cannot float. When the plug and the adapter connector are plugged and locked, the ceramic pin and ceramic sleeve will be damaged, resulting in unstable loss, affecting the optical performance, and even causing the ceramic sleeve at the plug end to break.

[0131] In the contact structure of the present invention, the pin components at both ends are limited by the corresponding outer flange 3 by closing, the pin components can move at the end of the outer flange 3, the outer flange 3 is threadedly connected with the adapter flange 5, the outer flange 3 and the adapter flange 5 are fixed relative to the housing 7 by the pressing plate 8, the limiting structure in the housing or the bonding method, so that the pin components can swing relative to the adapter connector, when the ceramic sleeve and the ceramic pin are plugged together and shear force occurs, the ceramic pin swings, reducing the shear force on the ceramic sleeve and the ceramic pin, avoiding damage to the plug-in structure, and thus avoiding affecting the optical performance; the adapter flange 5 realizes the air-tight function by the O-ring 4 or glue injection between the outer side and the housing 7, and realizes the air-tight function with the optical fiber 11 by glue coating inside, while avoiding damage caused by the plug-in structure, it not only improves the optical performance of the product, but also ensures air-tightness. The contact of the present invention can be installed in a socket housing of various connection forms for use, such as a socket with a threaded connection structure, a bayonet connection structure, a push-pull connection structure, and the like.

[0132] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An optical fiber airtight seal contact, characterized in that: The invention comprises a transfer flange (5), an outer flange (3) arranged at both ends of the transfer flange (5), and a pin component inserted into the end of the outer flange (3); the pin component comprises an inner flange (2), and a ceramic pin (1) inserted into the inner flange (2); the outer wall of the inner flange (2) is provided with a sleeve portion (203) protrudingly; the end of the outer flange (3) is a closed end (301); after the closed end (301) is closed, the end of the outer flange (3) forms a sleeve cavity (306); the inner flange (2) After being inserted into the end of the outer flange (3), the insert sleeve portion (203) is placed in the insert sleeve cavity (306) so that the pin component is movably arranged at the end of the outer flange (3); the optical fiber (11) is inserted into the adapter flange (5), and the airtightness of the optical fiber airtight contact part is achieved by injecting glue inside the adapter flange (5), and the optical fiber (11) is positioned, and the two ends of the optical fiber pass through the outer flange (3) and the inner flange (2) at the corresponding ends and then are inserted into the inner hole of the ceramic pin (1).

2. The optical fiber airtight contact according to claim 1, characterized in that: The adapter flange (5) is provided with an optical fiber bonding hole (501) at the middle position inside, and bundle tube bonding holes (502) which are connected to the optical fiber bonding hole (501) are provided at both ends. The optical fiber (11) is inserted into the optical fiber bonding hole (501) and the bundle tube bonding hole (502). A bundle tube (6) is inserted into the bundle tube bonding hole (502), and the bundle tube (6) is sleeved on the optical fiber (11).

3. The optical fiber airtight contact according to claim 2, characterized in that: After the optical fiber (11) is inserted into the optical fiber bonding hole (501) and the bundle tube bonding hole (502) of the transition flange (5), glue is injected. After the glue is injected, the bundle tube (6) is inserted into the bundle tube bonding hole (502). After the glue is cured, the air tightness of the transition flange (5) is checked. After the air tightness is qualified, the outer flanges (3) are installed at both ends of the transition flange (5).

4. The optical fiber airtight contact according to claim 3, characterized in that: After the ceramic plug pin (1) is inserted into the inner flange (2), glue is injected into the plug pin component. After the glue is injected, the inner flange (2) is inserted into the end of the outer flange (3). At the same time, the optical fiber (11) and the bundle tube (6) sleeved on the outer side of the optical fiber (11) are inserted into the plug pin component. The optical fiber (11) is inserted into the ceramic plug pin (1) and the inner flange (2), and the bundle tube (6) is inserted into the inner flange (2). After the glue is cured, the bundle tube (6), the optical fiber (11) and the plug pin component are fixed.

5. The optical fiber airtight contact according to claim 1, characterized in that: The outer wall of the adapter flange (5) is provided with an O-ring groove (503) and / or a glue injection groove (504).

6. The optical fiber airtight contact according to any one of claims 1 to 5, characterized in that: One end of the outer flange (3) away from the closing end (301) is a threaded connection end (302) for threaded connection with the adapter flange (5).

7. The optical fiber airtight contact according to claim 1, characterized in that: The inner wall of the inner flange (2) is provided with a first limiting step (202) for stopping the ceramic pin (1) forward.

8. The optical fiber airtight contact according to claim 1, characterized in that: An anti-rotation single key (204) is provided on the outer wall of the inserting sleeve (203), and correspondingly, an anti-rotation key slot (303) for inserting the anti-rotation single key (204) is provided at the end of the outer flange (3).

9. The optical fiber airtight contact according to claim 1, characterized in that: An observation hole (304) for observing whether the inner flange (3) is properly inserted is provided on the wall of the outer flange (3).

10. A transfer connector, comprising a housing (7), and a contact (9) inserted into a first contact hole (701) in the housing (7), characterized in that: The contact piece (9) is the optical fiber airtight contact piece as described in any one of claims 1 to 9. After the contact piece (9) is inserted into the housing (7), the end of the outer flange (5) and the pin component are located in the insertion cavity (704), and a pressure plate (8) is installed at the bottom of the insertion cavity (704). The insertion end of the pin component extends out of the pressure plate (8), and a fourth limiting step (802) for stopping the end of the outer flange (3) is provided in the second contact piece hole (801) in the pressure plate (8) for the pin component to pass through.

11. The adapter connector according to claim 10, characterized in that: The inner wall of the first contact member hole (701) is provided with a third limiting step (702), and the outer wall of the contact member is provided with a stopping boss (506) for abutting against the third limiting step (702).

Images