Multi-channel optical fiber ferrule

Abstract

The utility model discloses a multi-channel optical fiber insertion core which is used for insertion of optical fibers and optical signal transmission. The multi-channel optical fiber insertion core comprises a fiber inlet part and an insertion part. A cavity is formed in the fiber inlet part, and the fiber inlet part is configured to allow the optical fiber to enter; the insertion part and the fiber inlet part are integrally formed, the insertion part comprises a front end surface and a fiber outlet end surface which is concavely arranged on the front end surface, the fiber outlet end surface is provided with a plurality of optical fiber jacks which are arranged in parallel, the plurality of optical fiber jacks are communicated with the cavity, and positioning grooves which are in one-to-one correspondence with the optical fiber jacks are formed in the cavity; wherein the optical fiber outlet end face comprises a vertical extension face, a first indentation face and a second indentation face which are connected in sequence, the optical fiber jack is arranged on the vertical extension face, and the second indentation face is more indented inwards than the first indentation face. The fiber outlet end face of the multi-channel optical fiber ferrule is provided with the first indentation face and the second indentation face, so that the fiber outlet end face can be prevented from being burnt by a laser energy field.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical communication, and in particular relates to a multi-channel optical fiber insert. Background Art

[0002] The existing multi-channel fiber optic ferrule is injection molded by PPS material. After assembling and inserting multiple optical fibers, a rubber sleeve is put into the end of the fiber optic ferrule to fix and protect the tail of the optical fiber, and the optical fiber is fixed by glue. The fiber outlet end face is processed into a plane or an inclined surface by laser cutting or grinding, which is convenient for the assembly of the fiber optic ferrule with other components to realize the transmission of the optical path. The fiber outlet end face of the existing fiber optic ferrule is a plane or a single inclined surface. Due to insufficient avoidance, the fiber outlet end face is easily burned by the laser energy field when the laser cuts the optical fiber. In addition, the intersection of the inclined surface and the plane of the existing fiber outlet end face has edges and corners, which is easy to cause injection stress concentration and cracking when subjected to force. The existing ferrule needs to be covered with a rubber sleeve at the tail to protect the optical fiber and the tail of the optical fiber, which increases the assembly process and the cost of the rubber sleeve; due to the need to insert the rubber sleeve, the tail end space of the fiber optic ferrule is insufficient, the product is thin-walled, and the tail of the fiber optic ferrule is prone to cracking at the thin wall when subjected to force. In addition, since the edge of the glue dispensing window is a straight fold line, bubbles are easily generated in the corner of the window after glue dispensing, and the defective rate is high.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The utility model aims to provide a multi-channel optical fiber ferrule, whose fiber outlet end face has a plurality of gradually indented surfaces, which can prevent the fiber outlet end face from being burned by a laser energy field.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a multi-channel fiber optic ferrule for inserting optical fibers and transmitting optical signals. The multi-channel fiber optic ferrule includes: a fiber entry portion and a plug-in portion. A cavity is provided inside the fiber entry portion, and the fiber entry portion is configured for the optical fiber to enter; the plug-in portion is formed integrally with the fiber entry portion, and the plug-in portion includes a front end face and a fiber output end face recessed in the front end face; a positioning hole is provided on the front end face; a plurality of parallelly arranged fiber optic sockets are provided on the fiber output end face, and the plurality of fiber optic sockets are connected to the cavity and positioning grooves corresponding to the fiber optic sockets are provided in the cavity;

[0006] The fiber outlet end face comprises a vertical extension face, a first retracted face and a second retracted face which are connected in sequence, the optical fiber insertion hole is arranged on the vertical extension face, and the second retracted face is retracted more inwardly than the first retracted face.

[0007] In one or more embodiments of the present invention, a first retracted surface and a second retracted surface are provided on both upper and lower sides of the vertically extending surface.

[0008] In one or more embodiments of the present invention, the first retracted surface and the second retracted surface on the upper and lower sides of the vertically extending surface are symmetrically arranged.

[0009] In one or more embodiments of the present invention, the first retracted surface and the second retracted surface are planes with different inclinations.

[0010] In one or more embodiments of the present invention, the first setback surface is an arc-shaped surface, which is configured such that an R angle is formed between the vertically extending surface and the second setback surface, and the second setback surface is an inclined plane.

[0011] In one or more embodiments of the present invention, a fiber entry opening communicating with the cavity is provided on one side of the fiber entry portion away from the plug-in portion; and a distance between upper and lower surfaces of the fiber entry opening gradually decreases along the insertion direction of the optical fiber.

[0012] In one or more embodiments of the present invention, a glue pouring window is provided on the upper surface of the fiber entry portion; the glue pouring window includes a first inner wall, a second inner wall and a third inner wall, the first inner wall is arranged parallel to the vertical extension surface; the second inner wall is vertically arranged on one side of the first inner wall; the second inner wall is vertically arranged on the other side of the first inner wall relative to the second inner wall; a connecting surface is provided at the connection between the second inner wall / third inner wall and the first inner wall.

[0013] In one or more embodiments of the present invention, the connecting surface is an arc-shaped surface, and is configured such that an R angle is formed between the second inner wall / the third inner wall and the first inner wall.

[0014] In one or more embodiments of the present invention, the width of the fiber-introduction portion is greater than that of the plug-in portion, and two ends of the fiber-introduction portion are configured to protrude from the plug-in portion and form positioning portions.

[0015] In one or more embodiments of the present invention, the positioning portion is provided with a positioning surface parallel to the vertical extension surface, and the positioning surface is perpendicular to the side surface of the plug-in portion.

[0016] Compared with the prior art, the multi-channel optical fiber ferrule of the utility model has a first indented surface and a second indented surface, and the fiber outlet end face is not easily burned by the laser energy field. The spacing between the upper and lower surfaces of the fiber entry opening is gradually reduced along the insertion direction of the optical fiber to remain unchanged, which can avoid the side wall of the fiber entry part from being too thin and cracking and protect the optical fiber. In addition, the connection surface of the glue injection window can make it easier for glue to enter the inner wall connection to reduce the appearance of gaps, and better fix and protect the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a first stereoscopic view of a multi-channel optical fiber ferrule in an embodiment of the utility model;

[0019] Figure 2 This is a second stereoscopic view of a multi-channel optical fiber ferrule in one embodiment of the utility model;

[0020] Figure 3 A top view of a multi-channel optical fiber ferrule in one embodiment of the utility model;

[0021] Figure 4 for Figure 3 A cross-sectional view of a multi-channel optical fiber ferrule along the AA axis in one embodiment of the present invention.

[0022] Description of main reference numerals:

[0023] 1-fiber entry part, 11-cavity, 111-positioning groove, 12-fiber entry opening, 13-glue pouring window, 131-first inner wall, 132-second inner wall, 133-third inner wall, 134-connecting surface, 14-positioning part, 141-positioning surface, 2-plug-in part, 21-front end face, 22-fiber outlet end face, 221-vertical extension surface, 222-first indentation surface, 223-second indentation surface, 23-optical fiber jack, 24-positioning hole. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] like Figure 1-4As shown, a multi-channel fiber optic ferrule in one embodiment of the utility model is used for inserting optical fibers and transmitting optical signals. The multi-channel fiber optic ferrule includes: a fiber entry portion 1 and a plug-in portion 2. A cavity 11 is provided inside the fiber entry portion 1. The fiber entry portion 1 is configured to allow the optical fiber to enter. The plug-in portion 2 is formed integrally with the fiber entry portion 1. The plug-in portion 2 includes a front end face 21 and a fiber outlet end face 22 recessed in the front end face 21. A positioning hole 24 is provided on the front end face 21. A plurality of parallel fiber optic sockets 23 are provided on the fiber outlet end face 22, and the fiber optic sockets 23 are connected to the cavity 11; and a positioning groove 111 corresponding to the fiber optic sockets 23 is provided in the cavity 11. The optical fiber can enter the fiber optic socket 23 from the cavity 11 and then pass through the fiber outlet end face 22. The positioning groove 111 can support and position the optical fiber to prevent the optical fiber from bending.

[0026] The fiber outlet end face 22 includes a vertical extension face 221, a first retracted face 222, and a second retracted face 223 connected in sequence, the optical fiber jack 23 is arranged on the vertical extension face 221, and the second retracted face 223 is more retracted inwardly than the first retracted face 222. Retracting inwardly can be understood as the second retracted face 223 extending obliquely to a side further away from the fiber outlet end face 22 than the first retracted face 222.

[0027] In the above embodiment, the fiber outlet end face 22 includes a vertical extension face 221, a first retracted face 222, and a second retracted face 223 connected in sequence. Compared with the prior art, there is a larger angle at the connection between the inclined surface and the vertical extension face 221. The angle at the connection between the vertical extension face, the first retracted face 222, and the second retracted face 223 is smaller or has no angle, so that when the laser cuts the optical fiber, the fiber outlet end face 22 is not easily burned by the laser energy field. The multi-channel optical fiber ferrule is connected to the optical communication lens for optical signal transmission, and part of the optical communication lens can be inserted into the positioning hole 24 to achieve rapid positioning of the two.

[0028] In one embodiment, if Figure 1 and Figure 4 As shown, in order to further prevent the fiber outlet end face 22 from being burned by the laser energy field, the vertical extension surface 221 is provided with a first retracted surface 222 and a second retracted surface 223 on both sides. Preferably, the first retracted surface 222 and the second retracted surface 223 on both sides of the vertical extension surface 221 are symmetrically arranged.

[0029] The first retracted surface 222 and the second retracted surface 223 may be planes with different inclinations to provide the fiber outlet end face 22 with a better avoidance effect on the laser energy field. In one embodiment, the first retracted surface 222 may be an arcuate surface, configured to form an R angle between the vertical extension surface 221 and the second retracted surface 223. The second retracted surface 223 may be an inclined plane. There are no edges or corners at the connection between the first retracted surface 222 and the vertical extension surface 221 and the second retracted surface 223. When the optical fiber passes through the fiber outlet end face 22 and is laser cut, the first retracted surface 222 further prevents the fiber outlet end face 22 from being burned by the laser energy field.

[0030] The optical fiber is inserted into the optical fiber ferrule from the fiber entry portion 1. To prevent the optical fiber from bending during insertion or use and affecting the transmission of optical signals, Figure 2 As shown, a fiber entry opening 12 connected to the cavity 11 is provided on one side of the fiber entry portion 1 away from the plug-in portion 2. The spacing between the upper and lower surfaces of the fiber entry opening 12 gradually decreases along the insertion direction of the optical fiber until it remains unchanged. The fiber entry opening 12 is connected to the cavity 11 in a trumpet shape, and the fiber entry opening 12 does not have right-angled edges in the upper and lower directions, so that the optical fiber is not easily bent.

[0031] In the prior art, a rubber sleeve is provided at the fiber entry of some optical fiber ferrules to prevent the optical fiber from bending, which results in the side wall of the fiber entry portion 1 being very thin and easy to crack. The spacing between the upper and lower surfaces of the fiber entry opening 12 is gradually reduced along the insertion direction of the optical fiber to remain unchanged, which can prevent the side wall of the fiber entry portion 1 from being too thin and cracking, and the fiber entry opening 12 can also be used with a fixing glue to protect the optical fiber.

[0032] In order to protect and fix the optical fiber, a glue injection window 13 is provided on the upper surface of the fiber entry portion 1, for the fixing glue to flow in and fill the cavity 11 to protect and fix the optical fiber. After the existing optical fiber ferrule is added with glue, there will be a large number of gaps between the glue and the side wall of the ferrule, especially in the corners, which has a poor effect on fixing and protecting the optical fiber.

[0033] In one embodiment, if Figure 2 and Figure 3 As shown, the glue-filling window 13 includes a first inner wall 131, a second inner wall 132 and a third inner wall 133. The first inner wall 131 is arranged parallel to the vertical extension surface 221. The second inner wall 132 is arranged vertically on one side of the first inner wall 131. The second inner wall 132 is arranged vertically on the other side of the first inner wall 131 relative to the second inner wall 132. A connecting surface 134 is provided at the connection between the second inner wall 132 / the third inner wall 133 and the first inner wall 131. The connecting surface 134 can increase the angle between the two surfaces at the inner wall connection, so that the glue can enter the inner wall connection more easily to reduce the appearance of gaps. The glue can better fix and protect the optical fiber.

[0034] Preferably, the connecting surface 134 is an arc-shaped surface, and is configured to form an R angle between the second inner wall 132 / the third inner wall 133 and the first inner wall 131 , which can ensure to the greatest extent that no gap appears between the glue and the inner wall of the glue injection window 13 .

[0035] The multi-channel optical fiber ferrule is mainly used in conjunction with an optical communication lens assembly. In order to improve the installation accuracy of the multi-channel optical fiber ferrule and the optical communication lens assembly, the width of the fiber entry portion 1 is greater than the plug-in portion 2, so that the two ends of the fiber entry portion 1 are configured to protrude from the plug-in portion 2 and form a positioning portion 14. The positioning portion 14 is provided with a positioning surface 141 parallel to the vertical extension surface 221, and the positioning surface 141 is perpendicular to the side of the plug-in portion 2. The arrangement of the positioning portion 14 and the positioning surface 141 can effectively improve the installation accuracy of the multi-channel optical fiber ferrule and the optical communication lens assembly, and improve the efficiency of optical communication.

[0036] In summary, the multi-channel fiber optic ferrule of the utility model has a first indented surface 222 and a second indented surface 223, and the fiber outlet end surface 22 can be prevented from being burned by the laser energy field. The spacing between the upper and lower surfaces of the fiber entry opening 12 is gradually reduced along the insertion direction of the optical fiber to remain unchanged, which can prevent the side wall of the fiber entry part 1 from being too thin and cracking and protect the optical fiber. In addition, the connection surface 134 of the glue injection window 13 can make it easier for glue to enter the inner wall connection to reduce the appearance of gaps, and better fix and protect the optical fiber.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-channel optical fiber ferrule, used for inserting optical fibers and transmitting optical signals, characterized in that: include: A fiber entry portion, wherein a cavity is provided inside the fiber entry portion, and the fiber entry portion is configured to allow the optical fiber to enter; and The plug-in portion is formed integrally with the fiber-entry portion, and the plug-in portion includes a front end face and a fiber-outlet end face recessed in the front end face; a positioning hole is provided on the front end face; a plurality of parallel optical fiber plug holes are provided on the fiber-outlet end face, the plurality of optical fiber plug holes are connected to the cavity, and positioning grooves corresponding to the optical fiber plug holes are provided in the cavity; The fiber outlet end face comprises a vertical extension face, a first retracted face and a second retracted face which are connected in sequence, the optical fiber insertion hole is arranged on the vertical extension face, and the second retracted face is retracted more inwardly than the first retracted face.

2. The multi-channel optical fiber ferrule according to claim 1, characterized in that: The upper and lower sides of the vertically extending surface are both provided with a first retracted surface and a second retracted surface.

3. The multi-channel optical fiber ferrule according to claim 2, characterized in that: The first indented surface and the second indented surface on the upper and lower sides of the vertically extending surface are symmetrically arranged.

4. The multi-channel optical fiber ferrule according to claim 1, characterized in that: The first retracted surface and the second retracted surface are planes with different inclinations.

5. The multi-channel optical fiber ferrule according to claim 1, characterized in that: The first retracted surface is an arc-shaped surface, and is configured such that an R angle is formed between the vertically extending surface and the second retracted surface, and the second retracted surface is an inclined plane.

6. The multi-channel optical fiber ferrule according to claim 1, characterized in that: A fiber entry opening communicating with the cavity is provided on one side of the fiber entry portion away from the plug-in portion; and a distance between upper and lower surfaces of the fiber entry opening gradually decreases along the insertion direction of the optical fiber.

7. The multi-channel optical fiber ferrule according to claim 1, characterized in that: A glue pouring window is provided on the upper surface of the fiber entry portion; the glue pouring window includes a first inner wall, a second inner wall and a third inner wall, the first inner wall is arranged parallel to the vertical extension surface; the second inner wall is vertically arranged on one side of the first inner wall; the second inner wall is vertically arranged on the other side of the first inner wall relative to the second inner wall; a connecting surface is provided at the connection between the second inner wall / the third inner wall and the first inner wall.

8. The multi-channel optical fiber ferrule according to claim 7, characterized in that: The connecting surface is an arc-shaped surface, and is configured such that an R angle is formed between the second inner wall / the third inner wall and the first inner wall.

9. The multi-channel optical fiber ferrule according to claim 1, characterized in that: The fiber-introduction portion has a width greater than that of the insertion portion, and two ends of the fiber-introduction portion are configured to protrude from the insertion portion and form positioning portions.

10. The multi-channel optical fiber ferrule according to claim 9, characterized in that: The positioning portion is provided with a positioning surface parallel to the vertical extension surface, and the positioning surface is perpendicular to the side surface of the plug-in portion.

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