Optical fiber connector for pre-connecting optical fiber cable distribution box

Abstract

Disclosed in the present invention is an optical fiber connector for pre-connecting an optical fiber cable distribution box. The optical fiber connector comprises an optical fiber connector body and a pulling cap, wherein the pulling cap comprises a pulling cap body and a sealing sleeve body, and the pulling cap body and the sealing sleeve body are integrally formed by using a double-color injection molding process; a snap-fitting block is provided on an inner wall of the pulling cap body in a protruding manner, and a sealing rib is formed on an inner wall of the sealing sleeve body in a protruding manner; a snap-fitting part and an annular sealing face are formed on an outer housing of the optical fiber connector body; and after the pulling cap is screwed on the optical fiber connector body, the snap-fitting block on the inner wall of the pulling cap body is fitted with the snap-fitting part on the outer housing of the optical fiber connector body to form an axial limiting structure, and the sealing rib on the inner wall of the sealing sleeve body and the annular sealing face on the outer housing of the optical fiber connector body form a sealing pair. In the present invention, the pulling cap is ingenious in terms of structural design, achieves all of pulling, protection and sealing functions on the optical fiber connector body as a component, and has a large pulling force, a good sealing effect and a low production cost.

Description

Fiber optic connectors for pre-connected fiber optic cable distribution boxes Technical Field

[0001] This invention belongs to the field of optical fiber communication technology, and specifically relates to an optical fiber connector for a pre-connected optical cable distribution box. Background Technology

[0002] A pull-type fiber optic connector is a type of fiber optic connector that can be passed through the wiring conduit at the equipment terminal along with the optical cable. Because it typically uses a pull cord to secure the connector's cap, allowing it to be threaded through pre-installed wiring conduits and connect the optical cable to the terminal equipment, it is called a pull-type fiber optic connector. Technical issues

[0003] The existing traction fiber optic connectors used for pre-connected fiber optic cable distribution boxes have the following problems during use: (1) The traction cap cannot form an organic whole with the fiber optic connector body. When the traction cable is pulled through the wiring duct, the tensile force of the traction cap and the fiber optic connector is greatly restricted. The tensile force is easily transmitted to the fiber optic cable, causing deformation or damage to the fiber optic cable; (2) In outdoor environments, the sealing and waterproofing effect of the traction cap is poor. The traction cap cannot achieve both high tensile strength and strong sealing waterproof and dustproof effects, which makes it easy for rainwater or dust to seep into the interior of the fiber optic connector and affect the performance of the fiber optic connector. Technical solutions

[0004] The technical problem to be solved by the present invention is to provide an optical fiber connector for a pre-connected optical cable distribution box with ingenious structural design, large traction force, and good sealing and waterproof performance.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: an optical fiber connector for pre-connecting optical cable distribution boxes, comprising an optical fiber connector body and a pulling cap, wherein the pulling cap comprises a rigid plastic pulling cap body and an elastic material sealing sleeve body, the pulling cap body and the sealing sleeve body being integrally molded using a two-color injection molding process; a locking block is protruding on the inner wall of the pulling cap body, and a sealing rib is protruding on the inner wall of the sealing sleeve body; a locking part that cooperates with the locking block and an annular sealing surface that seals with the sealing sleeve body are formed on the outer shell of the optical fiber connector body; after the pulling cap is screwed onto the optical fiber connector body, the locking block on the inner wall of the pulling cap body and the locking part on the outer shell of the optical fiber connector body cooperate to form an axial limiting structure, and the sealing rib on the inner wall of the sealing sleeve body and the annular sealing surface on the outer shell of the optical fiber connector body form a sealing pair.

[0006] As a preferred technical solution, the locking part includes a slot adapted to the shape of the locking block and a mating channel for the locking block to extend into the slot for easy screwing and locking.

[0007] As a preferred technical solution, the traction cap body is made of polypropylene.

[0008] As a preferred technical solution, the sealing sleeve is made of thermoplastic rubber.

[0009] As a preferred technical solution, the outer end of the traction cap is provided with a traction head, and a traction hole is formed on the traction head.

[0010] As a preferred technical solution, the traction hole is an arc-shaped or circular hole.

[0011] As a preferred technical solution, a first connecting groove is formed between the outer end of the traction head and the traction cap body, and a second connecting groove is formed on the outer shell of the fiber optic connector body, with a connecting rope installed between the first connecting groove and the second connecting groove.

[0012] As an optional technical solution, a first connecting groove is formed on the outer wall of the traction cap, and a second connecting groove is formed on the outer shell of the optical fiber connector body, with a connecting rope installed between the first connecting groove and the second connecting groove.

[0013] As a preferred technical solution, a pull cord is installed on the outer shell of the fiber optic connector body.

[0014] As a preferred technical solution, the outer wall of the traction cap is provided with an anti-slip grip portion. Beneficial effects

[0015] By adopting the above technical solution, the present invention has at least the following beneficial effects:

[0016] (1) The traction cap includes a rigid plastic traction cap body and an elastic material sealing sleeve body, which are integrally molded by a two-color injection molding process; a locking block is protruding on the inner wall of the traction cap body, and a sealing rib is protruding on the inner wall of the sealing sleeve body; the outer shell of the fiber optic connector body has a locking part that cooperates with the locking block and an annular sealing surface that seals with the sealing sleeve body, so that when the traction cap is screwed onto the fiber optic connector body, the locking block on the inner wall of the rigid plastic traction cap body cooperates with the locking part on the outer shell of the fiber optic connector body to form an axial limiting structure. This design ensures that the traction cap and the fiber optic connector body form an organic whole. When the fiber optic cable is pulled through the cabling conduit, the pulling force is mainly applied to the locking block, and the tensile force of the fiber optic connector body is not transmitted to the fiber optic cable, thus preventing deformation or damage to the cable. On the other hand, the sealing ribs on the inner wall of the elastic sealing sleeve can form a reliable sealing pair with the annular sealing surface on the outer shell of the fiber optic connector body. There are no sealing rings visible from the outside of the connector, effectively forming an internal sealing structure. During operation, the sealing rings can be prevented from getting dirty by the external environment, thus preventing seal failure. In particular, it provides good waterproof and dustproof sealing performance in outdoor environments.

[0017] (2) The traction cap is integrally molded using a two-color injection molding process. As a single component, it simultaneously achieves traction, protection, and sealing functions. It has low production costs, is easy to install and use, is suitable for widespread application, and has a huge market prospect. Attached Figure Description

[0018] The following figures are intended only to illustrate and explain the invention and do not limit the scope of the invention. Wherein:

[0019] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the exploded structure according to an embodiment of the present invention;

[0021] Figure 3 is a three-dimensional structural diagram of the traction cap in an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the main structure of the traction cap in an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the cross-sectional structure along direction AA in Figure 4;

[0024] Figure 6 is a schematic diagram of the structure of the traction cap body part of the traction cap in an embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of the sealing sleeve portion of the traction cap in an embodiment of the present invention;

[0026] Figure 8 is a schematic diagram of the structure of the optical fiber connector body in an embodiment of the present invention;

[0027] Figure 9 is a cross-sectional structural diagram of the part where the traction cap and the fiber optic connector body mate.

[0028] Figure 10 is a magnified view of point I in Figure 9. Embodiments of the present invention

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0030] As shown in Figures 1 to 10, the fiber optic connector for pre-connecting the fiber optic cable distribution box includes a fiber optic connector body 10 and a traction cap 20. The traction cap 20 includes a rigid plastic traction cap body 21 and an elastic material sealing sleeve 22. The traction cap body 21 is preferably made of polypropylene (PP), which has high mechanical strength and good wear resistance. The sealing sleeve is preferably made of thermoplastic rubber. The traction cap body 21 and the sealing sleeve 22 are integrally molded into one part using a two-color injection molding process, which results in low production cost and convenient installation and use.

[0031] Of course, referring to Figures 6 and 7, the traction cap 21 and the sealing sleeve 22 can also be molded separately and then assembled into a single structure. The inner end of the traction cap 21 is provided with an annular connecting seat 25, and the annular connecting seat 25 has a recessed hole 26 along its circumferential surface. The inner wall of the sealing sleeve 22 has a protruding insert 27 that can be embedded into the recessed hole 26. After assembly, the traction cap 21 and the sealing sleeve 22 easily form an organic whole, possessing both good mechanical and sealing properties. When using a two-color injection molding process, the injection mold can also adopt the above-described molding structure.

[0032] Referring to Figures 3 to 7, two locking blocks 23 protrude from the inner wall of the traction cap 21, and one or more sealing ribs 24 protrude from the inner wall of the sealing sleeve 22; referring to Figure 8, the outer shell of the fiber optic connector body 10 has a locking part 11 that mates with the locking blocks 23 and an annular sealing surface 12 that seals with the sealing sleeve 22; the locking part 11 includes a slot 111 that matches the shape of the locking block 23 and a mating channel 112 for the locking block 23 to extend into the slot 111 for quick screwing and locking.

[0033] When the traction cap 20 is screwed onto the fiber optic connector body 10, the locking block 23 on the inner wall of the traction cap 21 cooperates with the locking part 11 on the outer shell of the fiber optic connector body 10 to form an axial limiting structure, making the traction cap 20 and the fiber optic connector body 10 an organic whole. The traction cap 20 cannot move axially. When the optical cable is pulled through the wiring duct, the pulling force mainly acts on the locking block 23, and the tensile force of the fiber optic connector body 10 is not transmitted to the optical cable, which can avoid deformation or damage to the optical cable. At the same time, referring to Figures 9 and 10, the sealing rib 24 on the inner wall of the sealing sleeve 22 and the annular sealing surface 12 on the outer shell of the fiber optic connector body 10 form an interference fit sealing pair, effectively forming an internal sealing structure. In this way, there is no sealing ring visible from the outside of the connector, which can prevent the sealing ring from getting dirty in the external environment during operation and avoid sealing failure. In particular, the waterproof and dustproof sealing effect is outstanding in outdoor environments.

[0034] Referring to Figure 4, the outer end of the traction cap 21 is provided with a traction head 28, on which a traction hole is formed for easy threading of the traction rope. The traction hole is preferably arc-shaped or circular to prevent the traction rope from cutting the hole during traction. The outer wall of the traction cap 21 is provided with an anti-slip grip for easy operation.

[0035] Referring to Figures 1, 4, and 8, in this embodiment, a first connecting groove 29 is formed between the outer end of the traction head 28 and the traction cap body 21, and a second connecting groove 13 is formed on the outer shell of the fiber optic connector body 10. A connecting rope 30 is installed between the first connecting groove 29 and the second connecting groove 13, and mounting rings 31 are respectively provided at both ends of the connecting rope 30. In this way, the fiber optic connector body 10 and the traction cap 20 are connected together by the connecting rope 30, which can prevent the traction cap 20 from falling off and being lost from the fiber optic connector body 10. Of course, the first connecting groove can also be formed on the outer wall of the traction cap body 21 to realize the mounting ring installation function, and both should fall within the protection scope of this invention.

[0036] Referring to Figure 8, a pull cord 14 is installed on the outer shell of the fiber optic connector body 10. During operation, pulling the pull cord can unlock the connector so that it can be pulled out from the adapter.

[0037] In this invention, the traction cap 20 is integrally molded using a two-color injection molding process. As a component, it simultaneously performs the functions of traction, protection, and sealing of the fiber optic connector body 10. Compared with traditional outdoor waterproof connectors, it has a large traction force, good sealing effect, low production cost, and is easy to install and use. It is suitable for widespread application and has a huge market prospect.

[0038] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. An optical fiber connector for pre-connecting optical cable distribution boxes, comprising an optical fiber connector body and a pull cap, characterized in that: The traction cap includes a rigid plastic traction cap body and an elastic material sealing sleeve body, which are integrally molded using a two-color injection molding process. A locking block protrudes from the inner wall of the traction cap body, and a sealing rib protrudes from the inner wall of the sealing sleeve body. The outer shell of the fiber optic connector body has a locking portion that mates with the locking block and an annular sealing surface that seals with the sealing sleeve body. After the traction cap is screwed onto the fiber optic connector body, the locking block on the inner wall of the traction cap body and the locking portion on the outer shell of the fiber optic connector body form an axial limiting structure, and the sealing rib on the inner wall of the sealing sleeve body and the annular sealing surface on the outer shell of the fiber optic connector body form a sealing pair.

2. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 1, characterized in that: The locking part includes a slot adapted to the shape of the locking block and a mating channel for the locking block to extend into the slot for easy screwing and locking.

3. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 1, characterized in that: The traction cap is made of polypropylene.

4. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 1, characterized in that: The sealing sleeve is made of thermoplastic rubber.

5. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 1, characterized in that: The outer end of the traction cap is provided with a traction head, and a traction hole is formed on the traction head.

6. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 5, characterized in that: The traction hole is an arc-shaped or circular hole.

7. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 5, characterized in that: A first connecting groove is formed between the outer end of the traction head and the traction cap body, and a second connecting groove is formed on the outer shell of the fiber optic connector body. A connecting rope is installed between the first connecting groove and the second connecting groove.

8. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 1, characterized in that: A first connecting groove is formed on the outer wall of the traction cap, and a second connecting groove is formed on the outer shell of the fiber optic connector body. A connecting rope is installed between the first connecting groove and the second connecting groove.

9. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in claim 1, characterized in that: A pull cord is installed on the outer shell of the fiber optic connector body.

10. The fiber optic connector for a pre-connected fiber optic cable distribution box as described in any one of claims 1 to 9, characterized in that: The outer wall of the traction cap is provided with an anti-slip grip.

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