Connector tail sealing assembly

Abstract

A connector tail sealing assembly comprises a sealing plug and a connecting assembly, the front end of the sealing plug is in sealing connection with the tail of a connector shell, the rear end of the sealing plug is used for abutting against the connecting assembly, the sealing plug is provided with a threading hole for a cable of a connector to penetrate through, and the cable is tightly wrapped with the threading hole; the connecting assembly comprises a tail connecting piece and a pressing ring arranged in the tail connecting piece, the front end of the tail connecting piece is fixedly connected with the connector shell, and a plug sealing extrusion face capable of extruding the sealing plug is arranged at the end, facing the sealing plug, of the pressing ring. The condition that the rubber ring cannot be normally assembled due to the fact that the elastic claw part is prone to plastic deformation after being repeatedly compressed can be avoided, and the reliable sealing effect can still be achieved after multiple times of assembly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of optical fiber connector, specifically relates to a connector tail sealing assembly. BACKGROUND

[0002] The outdoor optical fiber connector is widely used in the field of wireless communication for signal transmission, and the optical interface of the equipment (such as RRU equipment) connected with the outdoor optical fiber connector usually comprises a built-in optical module and an external socket. The optical module is used for transmitting optical signals after being connected with the optical fiber connector, and the socket is matched with the shell of the optical fiber connector to play the role of connector anti-pulling and sealing.

[0003] At present, the waterproof connector that can be installed on site outdoors is usually in the form of connector + tail accessory, and the optical cable is usually sealed by using the tail accessory (such as a gland). Figure 1 The main structure of the connector + tail accessory form is given, and the tail accessory comprises a claw part 201, a sealing rubber ring 203 and a locking nut 202. Figure 2 As shown in the figure, the rear end of the claw part 201 is provided with a plurality of claws, and the claw part 201 is used for compressing the sealing rubber ring 203 to realize the sealing of the tail optical cable of the connector. The structure has the following defects: 1. The claw part 201 is usually made of nylon or other thermoplastic materials, and the sealing rubber ring 203 cannot be normally assembled after repeated compression due to plastic deformation, and the effective installation times are low; 2. The tail accessory containing the claw part 201 makes the length of the connector longer, and the connector cannot be used in some narrow environments. Utility model content

[0004] The utility model aims at providing a connector tail sealing assembly, avoiding the situation that the claw part is easily deformed after repeated compression, and realizing reliable sealing effect after multiple assembly.

[0005] In order to realize the above purpose, the utility model adopts the technical scheme of a connector tail sealing assembly, which comprises a sealing plug and a connecting assembly, the front end of the sealing plug is sealingly connected with the tail of the connector shell, the rear end of the sealing plug is used for abutting on the connecting assembly, a threading hole is arranged on the sealing plug for the cable of the connector to pass through, and the threading hole is tightly wrapped outside the cable; the connecting assembly comprises a tail connecting piece and a compression ring arranged in the tail connecting piece, the front end of the tail connecting piece is fixedly connected with the connector shell, and one end of the compression ring towards the sealing plug is provided with a plug sealing extrusion surface capable of extruding the sealing plug.

[0006] The beneficial effects are that: compared with the prior art, the sealing structure of the sealing plug and the connecting assembly can avoid the problem of excessive length of the connector caused by the use of the elastic claw structure, and facilitates the use of the connector in narrow space; the sealing plug can form effective sealing with the connector shell and the cable after being extruded by the compression ring in the connecting assembly.

[0007] Further, the tail connecting piece is screwed on the connector shell, and the tail connecting piece and the compression ring can rotate relative to the central axis of the connecting assembly during the screwing process.

[0008] The beneficial effects are that: the tail connecting piece can rotate relative to the compression ring around the central axis during the rotating installation process, avoiding direct friction between the sealing plug and the tail connecting piece, and further reducing the locking torque.

[0009] Further, the compression ring has a tapered section, and the inner diameter surface of the tapered section is a slope, and the plug sealing extrusion surface is formed by the slope.

[0010] The beneficial effects are that: the tapered section of the compression ring can form the plug sealing extrusion surface, and during the tightening process of the tail connecting piece, the plug sealing extrusion surface can convert the extrusion force received by the tail connecting piece during axial movement into axial and radial forces, wherein the axial force can extrude the sealing plug to realize the sealing of the tail end of the connector shell by the sealing plug, and the radial force can realize the sealing of the cable at the tail end of the connector by the sealing plug.

[0011] Further, the included angle between the plug sealing extrusion surface and the central axis of the compression ring is an acute angle.

[0012] The beneficial effects are that: the extrusion force can be more effectively converted into axial and radial forces, and better sealing effect can be achieved.

[0013] Further, the compression ring further has a cylindrical section, and the cylindrical section is connected with the small-diameter end of the tapered section; the outer diameter surface of the cylindrical section and the inner diameter surface of the tail connecting piece are connected through convex-concave matching.

[0014] The beneficial effects are that: the compression ring and the tail connecting piece can be pre-assembled into an integral body through convex-concave matching in the factory, reducing the number of parts for on-site assembly, and facilitating the relative rotation of the tail connecting piece and the compression ring.

[0015] Further, the inner diameter surface of the tail connecting piece and the outer diameter surface of the cylindrical section of the compression ring are connected through convex key and groove; the convex key and the groove are respectively arranged on the tail connecting piece and the compression ring, or the convex key and the groove are respectively arranged on the compression ring and the tail connecting piece.

[0016] Its beneficial effects are: it provides a structural form of convex-concave fit, and the positions of the convex key and the groove can be interchanged, so that the tail connector and the clamping ring can be assembled.

[0017] Furthermore, the inner diameter surface of the tail connector is provided with an inclined surface, which can fit and contact the outer diameter surface of the conical section of the compression ring.

[0018] Its beneficial effect is that the inclined surface fits into the conical section of the clamping ring, which helps the tail connector to squeeze the clamping ring and deform it during installation.

[0019] Furthermore, the outer circular surface of the front end of the sealing plug is provided with a sealing protrusion. When the sealing plug is installed into the tail end of the connector housing, the sealing protrusion is squeezed and deformed to form a seal.

[0020] Its beneficial effect is that the sealing protrusion, after being squeezed and deformed, can further ensure the sealing effect of the sealing plug and the connector housing.

[0021] Furthermore, the wall of the through hole of the sealing plug is provided with a sealing protrusion. When the cable passes through the sealing plug, it squeezes the sealing protrusion to form a seal on the cable.

[0022] Its beneficial effect is that the sealing protrusion, after being squeezed and deformed, can further ensure the sealing effect of the sealing plug and the cable.

[0023] The beneficial effects of this utility model are: the use of a sealed plug in this utility model avoids the problem of the connector being too long due to the tail attachment of the spring claw structure compared to the prior art, and also avoids the problem of the rubber ring being unable to be properly assembled due to plastic deformation caused by repeated compression of the spring claw structure.

[0024] This invention allows the clamping ring and the tail connector to be pre-assembled into a connecting component using a convex-concave mating key and groove (such as a mating key and an assembly groove). This reduces the number of parts and installation steps required during on-site operation, avoids the problem of missing parts, and improves the user experience.

[0025] When the tail connector is tightened, the tail connector and the clamping ring rotate relative to each other around the central axis, which can avoid direct relative rotational friction between the sealing plug and the tail connector, thereby reducing the tightening torque during operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a waterproof connector in the prior art;

[0027] Figure 2 This is a structural schematic diagram of the spring claw component of the tail attachment in the prior art;

[0028] Figure 3This is a schematic diagram of the structure of this utility model;

[0029] Figure 4 This is a schematic diagram of the connecting component in this utility model;

[0030] Figure 5 This is an exploded view of the connecting component in this utility model;

[0031] Figure 6 This is a schematic diagram of the compression ring in this utility model;

[0032] Figure 7 This is a schematic diagram of the tail connector in this utility model;

[0033] Figure 8 This is a schematic diagram of the assembly of this utility model on a connector;

[0034] The diagram shows the following markings: 100, connector; 101, inner core assembly; 102, connector housing; 103, cable.

[0035] 201. Spring claw parts; 202. Locking nut; 203. Sealing ring;

[0036] 300. Tail sealing assembly; 301. Tail connector; 3011. Internal thread; 3012. Mating key; 3013. Bevel; 3014. Stop surface; 302. Compression ring; 3021. Plug sealing extrusion surface; 3022. Assembly groove; 3023. Anti-detachment key; 303. Sealing plug; 3031. Sealing protrusion; 304. Connecting assembly. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0038] like Figure 3 As shown, a connector tail sealing assembly is installed at the tail of a waterproof fiber optic connector to seal the connector tail and cable 103. The front end of the cable 103 is connected to the inner core assembly 101 inside the connector housing 102, and the cable 103 extends from the tail of the connector housing 102.

[0039] Continue to refer to the appendix Figure 3As shown, the tail sealing assembly 300 includes a tail connector 301, a clamping ring 302, and a sealing plug 303. The front end of the sealing plug 303 is sealed to the tail of the connector housing 102. The rear end of the sealing plug 303 presses against the clamping ring 302, and the deformation of the clamping ring 302 seals the area between the sealing plug 303 and the tail connector 301. The sealing plug 303 has a through hole at its center for the cable 103 at the tail end of the connector to pass through, and seals the area around the cable 103. The front end of the tail connector 301 has an internal thread for threaded connection with the connector housing 102. It is understood that in other embodiments, other connection structures can be used to achieve a fixed connection between the tail connector 301 and the connector housing 102, such as a snap-fit ​​connection.

[0040] The sealing plug 303 has a sealing protrusion 3031 on its outer circular surface at the front end and / or on the wall of the wire hole. The sealing protrusion 3031 is deformed by pressing it to form a seal. The sealing protrusion 3031 is an annular ridge distributed circumferentially, and at least one sealing protrusion 3031 is provided.

[0041] like Figure 4 , 5 As shown, the clamping ring 302 is installed inside the tail connector 301 and is located at the tail end of the tail connector 301. The front end of the tail connector 301 is provided with an internal thread for threaded connection with the connector housing 102.

[0042] like Figure 6 As shown, the clamping ring 302 has an overall trumpet-shaped structure, including a conical segment A and a cylindrical segment B. The inner diameter surface of the conical segment A forms a plug sealing extrusion surface 3021. The outer diameter surface of the cylindrical segment B is provided with an assembly groove 3022, which is an annular groove extending circumferentially along the cylindrical segment B. A ring of anti-detachment protrusions 3023 is provided at the end of the outer diameter surface of the cylindrical segment B away from the conical segment A. The anti-detachment protrusions 3023 are either continuous annular rings or multiple protrusions or strips spaced apart along the circumference. In this embodiment, the anti-detachment protrusions 3023 are continuous annular rings.

[0043] The assembly groove 3022 and the anti-detachment protrusion 3023 can form a barb structure. After the clamping ring 302 is installed into the tail connector 301, the formed barb structure engages with the tail connector 301, which can prevent the clamping ring 302 from falling off.

[0044] like Figure 7As shown, the rear end of the inner diameter surface of the tail connector 301 is provided with a center-protruding mating key 3012, which can engage with the mounting groove 3022. The mating key 3012 is a continuous annular shape, with a beveled surface 3013 at its front, which can contact the outer diameter surface of the tapered section of the clamping ring 302. A stop surface 3014 is provided at its rear, which can engage with the anti-detachment key 3023. After the mating key 3012 is engaged in the mounting groove 3022, the beveled surface 3013 and the stop surface 3014 limit the clamping ring 302 from both front and rear directions, thereby preventing the clamping ring 302 from falling off. The front end of the inner diameter surface of the tail connector 301 is provided with an internal thread 3011 for threaded connection with the connector housing 102.

[0045] In this embodiment, the clamping ring 302 and the tail connector 301 are connected together by a mating key 3012 and a mounting groove 3022. In other embodiments, the positions of the mating key 3012 and the mounting groove 3022 can be interchanged, while still achieving the same technical effect.

[0046] Figure 8 An assembly diagram of the present invention with a connector is provided. The sealing plug 303 is threaded onto the cable at the tail end of the connector 100 and inserted forward into the tail end of the connector housing 102. Then, the clamping ring 302 is inserted into the connecting assembly 304 formed by the tail connector 301. The tail connector 301 is then screwed onto the connector housing 102, squeezing the sealing plug 303 therein to form a seal.

[0047] After assembly, the sealing principle of the sealing plug 303 is as follows: Figure 6 As shown, with the central axis of the clamping ring 303 as the Z-axis and the radial direction as the Y-axis, the angle θ between the sealing extrusion surface 3021 of the plug and the central axis is an acute angle, compressing and sealing the rubber plug 303. After the clamping ring 302 is installed into the tail connector 301, during the connection process between the tail connector 301 and the connector housing 102, the tail connector 301 moves along the Z-axis. The sealing extrusion surface 3021 of the plug can convert the resistance to the movement of the tail connector 301 along the Z-axis into compression of the sealing plug 303 in both the Z-axis and Y-axis directions. The compression component in the Y-axis direction points towards the center, achieving a seal between the cable 103 and the sealing plug 303. The component in the Z-axis direction achieves a seal between the sealing plug 303 and the connector housing 102. This forms a seal for the cable and the tail of the connector.

[0048] After the clamping ring 302 and the tail connector 301 are assembled, the clamping ring 302 can rotate relative to the tail connector 301 around the central axis. When the tail connector 301 is tightened to seal the sealing plug 303, the tail connector 301 and the clamping ring 302 rotate relative to each other around the central Z-axis, which can avoid direct contact friction between the sealing plug 303 and the tail connector 301, thereby reducing the locking torque when the tail connector 301 is locked.

[0049] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.

Claims

1. A connector tail sealing assembly, characterized in that: The assembly includes a sealing plug (303) and a connecting component (304). The front end of the sealing plug (303) is sealed to the rear end of the connector housing (102). The rear end of the sealing plug (303) is used to abut against the connecting component (304). The sealing plug (303) is provided with a wire hole for the cable (103) of the connector to pass through. The wire hole is tightly wrapped around the cable (103). The connecting component (304) includes a tail connector (301) and a clamping ring (302) disposed in the tail connector (301). The front end of the tail connector (301) is fixedly connected to the connector housing (102). The clamping ring (302) is provided with a plug sealing compression surface (3021) that can compress the sealing plug (303) at one end facing the sealing plug (303).

2. The connector tail sealing assembly according to claim 1, characterized in that: The tail connector (301) is screwed onto the connector housing (102), and during the screwing process, the tail connector (301) and the clamping ring (302) can rotate relative to each other about the central axis of the connecting assembly (304).

3. The connector tail sealing assembly according to claim 1, characterized in that: The compression ring (302) has a conical section, the inner diameter surface of which is inclined, and the inclined surface forms the plug sealing extrusion surface (3021).

4. The connector tail sealing assembly according to claim 3, characterized in that: The angle between the sealing extrusion surface (3021) of the plug and the central axis of the compression ring (302) is an acute angle.

5. The connector tail sealing assembly according to claim 3, characterized in that: The compression ring (302) is also provided with a cylindrical section, which is connected to the small diameter end of the conical section; the outer diameter surface of the cylindrical section and the inner diameter surface of the tail connector (301) are connected by a convex-concave fit.

6. The connector tail sealing assembly according to claim 5, characterized in that: The inner diameter surface of the tail connector (301) and the outer diameter surface of the cylindrical section of the clamping ring (302) are fitted together by a convex key and a groove; the convex key and the groove are respectively provided on the tail connector (301) and the clamping ring (302), or the convex key and the groove are respectively provided on the clamping ring (302) and the tail connector (301).

7. The connector tail sealing assembly according to claim 3, characterized in that: The inner diameter surface of the tail connector is provided with a bevel (3013), which can fit and contact the outer diameter surface of the conical section of the clamping ring (302).

8. The connector tail sealing assembly according to claim 1, characterized in that: The outer circular surface of the front end of the sealing plug (303) is provided with a sealing protrusion (3031). When the sealing plug (303) is installed into the tail end of the connector housing (102), the sealing protrusion (3031) is squeezed and deformed to form a seal.

9. The connector tail sealing assembly according to claim 1 or 8, characterized in that: The sealing plug (303) has a sealing protrusion (3031) on the wall of the wire hole. When the cable (103) passes through the sealing plug (303), it squeezes the sealing protrusion (3031) to form a seal on the cable (103).

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