CN217739549U

CN217739549U - Core insert structure

Info

Publication number: CN217739549U
Application number: CN202221260995.1U
Authority: CN
Inventors: 邱基华; 郑镇宏; 刘洋; 冯晓鹏
Original assignee: Suzhou Sanhuan Technology Co ltd; Chaozhou Three Circle Group Co Ltd
Current assignee: Suzhou Sanhuan Technology Co ltd; Chaozhou Three Circle Group Co Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-11-04
Anticipated expiration: 2032-05-24

Abstract

The utility model discloses a ferrule structure, which comprises a ferrule, wherein a micropore for fixing an optical fiber is arranged in the middle of the ferrule, and a plurality of grooves are arranged at the rear end of the ferrule; the tail seat comprises a mounting part and a filling part, the inner wall of the mounting part is attached to the rear end of the ferrule, and the inner spaces of the groove and the mounting part are communicated with the inner space of the filling part; and the colloidal layer is filled in the groove, the inner space of the mounting part and the inner space of the filling part. The utility model discloses a rear end at the lock pin sets up the recess for the colloidal layer can get into and carry out the mutual bonding of lock pin and tailstock in the recess, compares in traditional terminal surface bonding, increases the side and bonds and to promote the stability of being connected of lock pin and tailstock. The utility model relates to an optical communication accessory technical field.

Description

Core inserting structure

Technical Field

The utility model relates to a lock pin structure among the optical communication accessory technical field.

Background

With the increasing demand of society for long-distance high-speed information transmission, the optical fiber transmission technology is more and more emphasized, and the higher requirements are also put forward for the peripheral industries matched with the optical fiber transmission technology. At an optical fiber connection point, an optical fiber ferrule is often used to fix one end of an optical fiber and is inserted into an optical fiber connector for optical fiber butt joint. The optical fiber ferrule has the advantages that the accuracy of optical fiber butt joint can be ensured, the optical fiber ferrule is convenient to assemble and disassemble, and field adjustment is facilitated.

The optical fiber ferrule is usually a ceramic ferrule which is a ceramic cylindrical small tube made of zirconium dioxide through firing, the middle of the optical fiber ferrule is provided with micropores for fixing optical fibers, the optical fiber ferrule is hard in texture and white and fine in color, the precision of a finished product reaches submicron level, the optical fiber ferrule is the most common and most numerous precise positioning piece in an optical fiber communication network, and the optical fiber ferrule is usually used for manufacturing optical fiber connectors, optically coupling devices and the like. The existing conventional SC type (SC and APC) ferrule with a seat has the outer diameter of the ferrule of 2.499 +/-0.0005 mm and the length pressure of 10.5 +/-0.05 mm, and is pressed and assembled with a metal tailstock according to the protruding length of 7.95-8.17 mm and then subjected to fiber penetrating, glue dispensing and curing.

However, since the end face of the ferrule and the tailstock are fixed to each other by the glue, the releasing force of the ferrule in the tailstock can only reach about F =200N to 280N, the releasing force of the ferrule pulled out from the tailstock is small, the ferrule and the tailstock are often separated in actual work, and the reliability of the ferrule with the seat after fiber threading, glue dispensing and curing is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve one of the technical problem that exists among the prior art at least, provide a lock pin structure, can make being connected of lock pin and tailstock more firm.

According to the utility model discloses the embodiment provides a lock pin structure, include:

the optical fiber connector comprises an inserting core, a plurality of connecting rods and a plurality of connecting rods, wherein a micropore for fixing an optical fiber is arranged in the middle of the inserting core, and a plurality of grooves are formed in the rear end of the inserting core;

the tail seat comprises an installation part and a filling part, the inner wall of the installation part is attached to the rear end of the inserting core, and the groove and the inner space of the installation part are communicated with the inner space of the filling part;

and the colloidal layer is filled in the groove, the inner space of the mounting part and the inner space of the filling part.

According to the utility model discloses, furtherly, the front end of lock pin is equipped with the chamfer.

According to the utility model discloses, furtherly, the rear end of lock pin is equipped with the taper hole, the internal diameter of taper hole is crescent backward in the past, the taper hole with the micropore intercommunication.

According to the utility model discloses, furtherly, the quantity scope of recess is 2 to 8, the equal circumference equidistance of recess sets up the rear end of lock pin.

According to the utility model discloses, furtherly, adjacent two still be equipped with the butt face between the recess, the butt face with the inner wall butt of installation department.

According to the embodiment of the utility model provides a, furtherly, the rear end face of lock pin with the interval of the preceding terminal surface of tailstock is the depth of insertion, recess length with the ratio scope of depth of insertion is 0.24 to 1.81.

According to the utility model discloses the embodiment, further, the degree of depth scope of recess is 0.1 to 0.3mm.

According to the utility model discloses the embodiment, further, the groove face roughness scope of recess is Ra0.1 to 12.5.

According to the utility model discloses embodiment, furtherly, the tailstock is the metalwork.

According to the utility model discloses, furtherly, the rear end of tailstock is equipped with the chamfer.

The utility model discloses beneficial effect includes at least: the utility model discloses a rear end at the lock pin sets up the recess for the colloidal layer can get into and carry out the mutual bonding of lock pin and tailstock in the recess, compares in traditional terminal surface bonding, increases the side and bonds and to promote the stability of being connected of lock pin and tailstock.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

FIG. 1 is a schematic diagram of a conventional ferrule configuration;

FIG. 2 is a block diagram of an embodiment of the present invention;

fig. 3 is an exploded view of an embodiment of the present invention;

fig. 4 is a rear end schematic diagram of the ferrule in the embodiment of the present invention.

Reference numerals: 100 '-traditional core insert, 200' -traditional tailstock, 100-core insert, 110-micropore, 120-groove, 130-taper hole, 140-abutting surface, 200-tailstock, 210-installation part, 220-filling part and 300-colloidal layer.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The embodiment of the utility model provides a lock pin structure sets up a plurality of recesses through the rear end at the lock pin to glue can flow in the recess when making the point glue, not only bonds the terminal surface of lock pin, also can bond the side of lock pin, promotes the joint strength of lock pin and tailstock, reduces the possibility that the lock pin drops from the tailstock.

Description figure 1 shows a schematic diagram of a conventional ferrule configuration. The rear end of the conventional ferrule 100 'is not provided with a groove, the conventional ferrule 100' is inserted into the tail seat 200 'and then subjected to a glue dispensing process, and glue is poured into the tail seat 200', so that the conventional ferrule 100 'is bonded with the tail seat 200', and the optical fiber is fixed. However, since the conventional ferrule 100 'is mainly in contact with the glue from the end surface thereof, when an external force is applied or the glue is aged, the glue may lose the adhesion force to the conventional ferrule 100', so that the conventional ferrule 100 'is easily released from the tail block 200'. In addition, in the situation where the ferrule structure needs to be frequently assembled and disassembled, the separation of the conventional ferrule 100' is aggravated when the ferrule structure is inserted and removed, and therefore, the connection strength between the ferrule and the tailstock needs to be improved.

Description figure 2 shows the structure diagram of the core insert structure. The ferrule 100 has a cylindrical shape and the tail block 200 has a tubular shape, and a space is provided therein. The ferrule 100 is inserted into the tailstock 200 after being installed with the optical fiber, and the glue layer 300 is filled in the gap inside the tailstock 200 by dispensing glue, so that the ferrule 100 and the tailstock 200 are bonded with each other, and the optical fiber and the tailstock 200 are fixed with each other, thereby preventing the optical fiber from shaking.

Description figure 3 shows an exploded view of the present ferrule arrangement. The ferrule 100 is provided therein with a micro-hole 110 for fixing an optical fiber, which penetrates from the front end to the rear end of the ferrule 100 and communicates with the tapered hole 130 at the rear end. The inner diameter of the tapered hole 130 is gradually increased from front to rear, so that the colloidal layer 300 can fix the optical fiber in the tapered hole 130. When the ferrule 100 is inserted into the mounting portion 210 of the tailstock 200 from the front to the rear, the inner wall of the mounting portion 210 can abut against the surface of the ferrule 100, thereby increasing the resistance of the ferrule 100 to be removed from the tailstock 200 by friction. A plurality of grooves 120 are further provided at the rear end of the ferrule 100, so that when glue is filled from the filling portion 220 of the tailstock 200, the glue can flow into the grooves 120 along the filling portion 220 and the mounting portion 210 in sequence for bonding. The shear resistance of the colloidal layer 300 is stronger than the tensile resistance, so that the connection strength between the ferrule 100 and the tail block 200 can be further improved.

Description figure 4 shows a schematic view of the back end of the ferrule 100. The number of the grooves 120 in this embodiment is four, and the grooves are circumferentially equidistantly disposed at the rear end of the ferrule 100, so that the adhesive force of the colloidal layer 300 to the ferrule 100 is more uniform. Moreover, the two adjacent grooves 120 are not connected to each other, and an abutting surface 140 is provided between the two adjacent grooves 120, for abutting against the inner wall of the mounting portion 210, and for preventing the ferrule 100 from shaking or shifting in the mounting portion 210.

Referring to fig. 2 to 3, the ferrule structure according to the embodiment of the present invention includes a ferrule 100, a tailstock 200, and a colloidal layer 300. The ferrule 100 is formed by firing zirconia, and has a cylindrical shape, and a micro-hole 110 for fixing an optical fiber is provided in the middle thereof, and the micro-hole 110 penetrates from the front end to the rear end of the ferrule 100. A plurality of grooves 120 are formed at the rear end of the ferrule 100, and glue can flow into the grooves 120 for filling during dispensing.

The tailstock 200 is a metal member, which is tubular and has high structural strength. The tailstock 200 includes a mounting portion 210 and a filling portion 220, the mounting portion 210 is used for interconnecting with the ferrule 100, and the filling portion 220 is used for filling glue. Further, since the groove 120, the inner space of the mounting portion 210, and the inner space of the filling portion 220 can be communicated with each other after the ferrule 100 and the tail block 200 are mounted to each other, a gap between the groove 120, the mounting portion 210, and the filling portion 220 can be filled when the filling portion 220 is filled with glue, thereby generating the glue layer 300 among the groove 120, the mounting portion 210, and the filling portion 220. The colloidal layer 300 serves to connect the ferrule 100 and the tail block 200, and also serves to fix and protect the position of the optical fiber.

Further, the rear end of the tailstock 200 is provided with a chamfer, so that glue can be poured conveniently during glue dispensing.

Further, the front end of the ferrule 100 is provided with a chamfer, thereby facilitating insertion of the ferrule 100 into the optical fiber connector.

Furthermore, the rear end of the ferrule 100 is provided with a taper hole 130, the inner diameter of the taper hole 130 gradually increases from front to back, and the front end of the taper hole 130 is connected with the micro-hole 110, so that when glue is poured, the glue can also permeate into the micro-hole from the taper hole 130, and the fixation of the optical fiber is enhanced; and the gradual change of the inner diameter of the taper hole 130 can also reduce the abrupt change of the adhesive force of the colloidal layer 300 to the optical fiber.

Further, the number of the grooves 120 ranges from 2 to 8, and the number of the grooves 120 in this embodiment is 4, which can be changed according to actual requirements, so that when the number of the grooves 120 is increased, the contact area between the side surface of the ferrule 100 and the colloidal layer 300 can be increased, and the connection strength of the ferrule 100 is further improved. It should be noted that the grooves 120 are all circumferentially and equidistantly disposed at the rear end of the ferrule 100, so that the adhesive force of the colloidal layer 300 to the ferrule 100 is more uniform, and the misalignment of the ferrule 100 caused by the non-uniform acting force is prevented.

Further, referring to fig. 4, an abutting surface 140 is disposed between two adjacent grooves 120, and the abutting surface 140 abuts against an inner wall of the mounting portion 210, so that the optical fiber signal transmission quality can be prevented from being affected by the movement of the ferrule 100 in the mounting portion 210.

Further, the distance between the rear end face of the ferrule 100 and the front end face of the tail block 200 is an insertion depth, and the ratio of the length of the groove 120 to the insertion depth ranges from 0.24 to 1.81, preferably from 0.65 to 0.75. The depth of the grooves 120 ranges from 0.1 to 0.3mm, preferably from 0.15 to 0.25mm; the groove surface roughness ranges from ra0.1 to 12.5, preferably from ra0.4 to 6.3. When the depth and the length of the groove 120 are too small, the slotting space is small, glue is difficult to uniformly flow into the groove 120 after glue dispensing, glue is easy to be insufficiently filled or bubbles occur, the effective contact area between the glue and the tailstock 200 is small, and the effect of increasing the releasing force of the tailstock 200 through the glue is not obvious. When the depth and length of the groove 120 are too large, the contact area of the inner wall of the mounting portion 210 and the outer diameter of the ferrule 100 in interference fit is reduced, the releasing force is greatly reduced, and although the dispensing can improve the releasing force to a certain extent, the releasing force of the whole cannot be effectively improved. Therefore, the releasing force of the ferrule 100 from the tail seat 200 is the effective contact area between the ferrule 100 and the tail seat 200 and the bonding force between the glue in the groove 120 and the tail seat 200, and the depth and length of the groove 120 should be kept within a limited range.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A ferrule structure, comprising:

2. The ferrule structure of claim 1, wherein: the front end of the insertion core is provided with a chamfer.

3. The ferrule structure of claim 1, wherein: the rear end of lock pin is equipped with the taper hole, the internal diameter of taper hole increases gradually from the past backward, the taper hole with the micropore intercommunication.

4. The ferrule structure of claim 1, wherein: the quantity scope of recess is 2 to 8, the equal circumference equidistance of recess sets up the rear end of lock pin.

5. The ferrule structure of claim 1, wherein: and abutting surfaces are further arranged between every two adjacent grooves and abut against the inner wall of the mounting part.

6. The ferrule structure of claim 1, wherein: the distance between the rear end face of the ferrule and the front end face of the tailstock is the insertion depth, and the ratio of the length of the groove to the insertion depth ranges from 0.24 to 1.81.

7. The ferrule structure of claim 1, wherein: the depth of the groove ranges from 0.1 to 0.3mm.

8. The ferrule structure of claim 1, wherein: the groove surface roughness of the groove ranges from Ra0.1 to 12.5.

9. The ferrule structure of claim 1, wherein: the tailstock is a metal piece.

10. The ferrule structure of claim 1, wherein: and the rear end of the tailstock is provided with a chamfer.