CN220913382U

CN220913382U - Optical fiber attenuator

Info

Publication number: CN220913382U
Application number: CN202322705270.XU
Authority: CN
Inventors: 梁汇; 吴婷; 何业明; 金鑫
Original assignee: Heng Dongguang Communication Technology Shenzhen Co ltd
Current assignee: Heng Dongguang Communication Technology Shenzhen Co ltd
Priority date: 2023-10-08
Filing date: 2023-10-08
Publication date: 2024-05-07
Anticipated expiration: 2033-10-08

Abstract

The utility model relates to the technical field of electronic devices, and provides an optical fiber attenuator, which can be connected with an optical fiber connector, and comprises the following components: a housing including a housing top; an attenuation ferrule mounted within the housing and configured to attenuate an accessed fiber optic connector; the locking piece is covered on the shell and comprises a top plate, and the attenuation inserting core is movably inserted and pulled out to be connected with the optical fiber connector through the locking piece; the center of the top plate is provided with a first notch, the top of the shell is penetrated through the first notch, and a movable interval is reserved on the periphery of the top of the shell along the axial direction of the first notch so that the top plate can move relative to the top of the shell; when the locking member is moved axially to extract the attenuating ferrule, the top of the shell exerts a supporting force on the top plate. According to the utility model, the top of the shell is used for generating supporting force on the top plate, so that the overall supporting strength of the shell is increased, and the structural firmness of the shell and the locking piece in interaction can be ensured to meet a higher expected level.

Description

Optical fiber attenuator

Technical Field

The utility model relates to the technical field of electronic devices, in particular to an optical fiber attenuator.

Background

An optical fiber attenuator is an optical device that can reduce the energy of an optical signal. The optical power attenuator is used for attenuating the input optical power, and avoids distortion generated by an optical receiver due to the super-strong input optical power. The optical fiber attenuator is used as an optical passive device for debugging optical power performance and calibrating and correcting a debugging optical fiber instrument in an optical communication system, and optical fiber signal attenuation. The product is manufactured by using an attenuation optical fiber doped with metal ions, and the optical power can be adjusted to a required level.

The traditional installation mode of the optical fiber attenuator mainly comprises the components of an attenuator shell, an attenuator inserting core, an attenuator locking piece and the like, wherein the attenuator inserting core is arranged in the attenuator shell, and then the optical fiber attenuator is inserted into/pulled out of an optical fiber connector or other devices by pulling the locking piece; however, in the conventional installation mode at present, the locking piece is usually arranged at the top of the attenuator shell in a covering manner, and two sides of the attenuator shell are provided with clamping parts which can penetrate through the attenuator shell so as to realize clamping connection with the attenuator shell; however, the installation mode makes the stress of the locking piece too concentrated due to the fact that the locking piece is connected with the attenuator shell in a single mode in the pulling process, damage to the attenuator shell or the locking piece is easy to occur, and meanwhile maintenance cost is increased.

Accordingly, there is a need for an optical fiber attenuator that can be constructed with high robustness and ease of use.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model aims to provide the optical fiber attenuator with strong structural firmness and high use convenience.

In order to solve the problems, the utility model provides the following technical scheme:

A fiber optic attenuator, an accessible fiber optic connector, comprising:

A housing including a housing top;

An attenuation ferrule mounted within the housing and configured to attenuate the accessed fiber optic connector;

The locking piece is covered on the shell and comprises a top plate, and the attenuation lock pin is movably connected with the optical fiber connector in a plug-in manner through the locking piece;

The center of the top plate is provided with a first notch, the top of the shell is penetrated through the first notch, and a movable space is reserved on the periphery of the top of the shell along the axial direction of the first notch so that the top plate can move relative to the top of the shell; when the locking member moves axially to extract the attenuating ferrule, the shell top creates a supporting force against the top plate.

In one embodiment, the locking piece further comprises side plates arranged at two sides of the top plate;

The optical fiber attenuator further comprises a linkage piece axially fixed on the side plate and a buckling piece which is far away from the linkage piece and arranged in the shell;

The optical fiber attenuator is connected into the female end of the optical fiber connector through the linkage piece and is connected into the male end of the optical fiber connector through the buckling piece.

In an embodiment, the shell further comprises shell side parts arranged at two sides of the top of the shell, the inner side walls of the side plates are provided with first limiting parts in a protruding mode towards the shell side parts, and the distal ends of the linkage pieces are provided with second limiting parts in a protruding mode towards two sides;

The first limiting part and the second limiting part are used for limiting the movement direction of the locking piece, and the locking piece can do reciprocating linear movement along the axial direction through the limiting of the first limiting part and the limiting of the second limiting part.

In an embodiment, a first movable groove corresponding to the first limiting part is formed in the side part of the shell, and the first limiting part moves in the first movable groove in a reciprocating mode along with the movement of the locking piece;

The outer shell is further provided with a second movable groove corresponding to the second limiting part at the male end of the optical fiber attenuator, and the second limiting part moves in the second movable groove in a reciprocating mode along with the movement of the locking piece.

In an embodiment, the locking member further comprises a support plate which is arranged along the axial direction and fixedly connected with the side portion of the shell, the support plate extends towards the side portion of the shell and is provided with a reinforcing rib, and the reinforcing rib abuts against or is separated from the side portion of the shell along with the movement of the locking member.

In an embodiment, the reinforcing ribs are arranged in a plurality, and any two adjacent reinforcing ribs are arranged at equal intervals.

In one embodiment, the shell top is convexly disposed within the first slot and is flush with an end face of the top plate.

In one embodiment, the side of the shell is provided with a second notch for one side of the fastener to be clamped in, the top of the shell is provided with a third notch for the top of the fastener to be clamped in, and the fastener is fixed in the shell through the second notch and the third notch.

In an embodiment, the supporting plate is further provided with a reinforcing layer integrally formed with the reinforcing ribs and the top plate;

The thickness of the reinforcing layer extending from one side of the supporting plate to the distal end is gradually reduced;

the height of the reinforcing rib extending from one side of the supporting plate to the distal end is gradually increased.

In an embodiment, a clamping portion is further disposed between two ends of the housing along the axial direction, the optical fiber attenuator further includes a ferrule fixing cap that is clamped and fixed with the clamping portion, and the ferrule fixing cap is sleeved on the attenuation ferrule to fix the attenuation ferrule.

The beneficial effects of the utility model are as follows: when the optical fiber attenuator is required to be pulled out, the locking piece is required to move relative to the shell by pulling the locking piece, and the top plate of the locking piece is enabled to be in butt joint with the top of the shell, so that supporting acting force is generated on the top plate by the top of the shell, the locking piece can drive the whole optical fiber attenuator to be pulled out of the inserted optical fiber connector, the whole supporting strength of the shell is improved, and the structural firmness of the shell and the locking piece in interaction can be guaranteed to meet a higher expected level.

Drawings

FIG. 1 is a perspective view of one embodiment of a fiber optic attenuator of the present utility model;

FIG. 2 is a schematic diagram of a fiber optic attenuator according to one embodiment of the present utility model;

FIG. 3 is an exploded view of one embodiment of a fiber optic attenuator of the present utility model;

FIG. 4 is a cross-sectional view of one embodiment of a fiber optic attenuator of the present utility model;

FIG. 5 is a cross-sectional view of a mating structure of one embodiment of a fiber optic attenuator of the present utility model;

FIG. 6 is a schematic diagram of a locking element of one embodiment of an optical fiber attenuator according to the present utility model;

FIG. 7 is a schematic view of a locking element of another embodiment of an optical fiber attenuator of the present utility model;

FIG. 8 is a schematic view of a fastener of one embodiment of a fiber optic attenuator according to the present utility model;

FIG. 9 is a schematic diagram of the housing of one embodiment of a fiber optic attenuator of the present utility model;

FIG. 10 is a schematic view of the housing of another embodiment of a fiber optic attenuator of the present utility model;

Fig. 11 is a schematic diagram illustrating a connection structure between a housing and a ferrule fixing cap in an optical fiber attenuator according to an embodiment of the present utility model.

Reference numerals:

100. An optical fiber attenuator; 200. another fiber optic attenuator; 100a, a male end of the optical fiber attenuator; 100b, a female end of the optical fiber attenuator; 200a, the male end of another fiber attenuator; 200b, the female end of another fiber optic attenuator; 110. attenuating the ferrule; 121. a first attenuating optical fiber; 122. a second attenuating optical fiber; 111. a ferrule fixing cap;

115. A linkage member; 14a, a first groove; B. locking points; 14b, a boss; C. unlocking points; 141. a second limit part;

116. A fastener; A. a first abutting portion; a1, a second abutting part;

117. a housing; 151. a shell top; 15a, a second groove; D. a first stop surface; E. a second stop surface; 152. a shell side portion; 15d, a third notch; 15e, a first movable groove; 15f, a second movable groove; 15g, a second notch; 153. an engagement portion; 15h, a guide groove;

210. A locking member; 211. a top plate; 20a, a first marking slot; 20b, a second marking slot; 21a, a first notch; 21b, an active space; 212. a support plate; 213. reinforcing ribs; 214. a reinforcing layer; 215. a side plate; 221. and a first limit part.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1-11, the present embodiment provides an optical fiber attenuator 100, which can be connected to an optical fiber connector and attenuate an optical fiber therein, wherein the type of the optical fiber connector that can be connected includes an optical fiber connector that needs to be attenuated or another optical fiber attenuator 200 of the same type as the optical fiber attenuator 100 in the present embodiment, and the purpose of connecting the other optical fiber attenuator 200 of the same type is to form an optical fiber attenuation device with greater attenuation intensity for the optical fiber.

Referring to fig. 1, 6 and 9, it preferably includes a housing 117, an attenuating ferrule 110 installed in the housing 117, and a locking member 210 covering the housing 117, wherein the attenuating ferrule 110 is used for attenuating an accessed optical fiber connector, and the housing 117 includes a housing top 151 and housing side portions 152 disposed at two sides of the housing top 151; the locking member 210 includes a top plate 211 and side plates 215 provided on both sides of the top plate 211.

Referring to fig. 1-5, according to the above-mentioned scheme, preferably, the optical fiber attenuator 100 further includes a linkage member 115 axially fixed on the side plate 215, the linkage member 115 and the side plate 215 are integrally formed, the fixation strength and the firmness are better, the orientation of the linkage member 115 is the same as the insertion direction of the male end 100a of the optical fiber attenuator 100, and the optical fiber attenuator 100 further includes a buckling member 116 disposed in the housing 117 away from the outermost end of the linkage member 115; it will be appreciated that, in one embodiment, the linkage 115 is inserted into the female end 200b of the other optical fiber attenuator 200 and is engaged with the engaging member 116 of the female end 200b of the other optical fiber attenuator 200 along with the movement of the locking member 210, so as to achieve the insertion of the male end 100a of the optical fiber attenuator 100 onto the female end 200b of the other optical fiber attenuator 200; in another embodiment, after the fastener 116 of the female end 100b is inserted into the male end 200a of the other optical fiber attenuator 200, the interlocking member 115 of the other optical fiber attenuator 200 is fastened to the fastener 116 of the female end 100b, so as to plug the male end 200a of the other optical fiber attenuator 200 into the female end 100b of the optical fiber attenuator 100.

It can be appreciated that the present embodiment allows the attenuating ferrule 110 to be pluggable to an external mating fiber optic connector or the same type of fiber optic attenuator 200 by moving the locking element 210.

It can be understood that the optical fiber connector or the other optical fiber attenuator 200 to be attenuated is default to be capable of being mutually matched and clamped with the male end 100a or the female end 100b of the optical fiber attenuator 100 in the present embodiment, and the optical fiber attenuator 100 in the present embodiment is matched with another optical fiber attenuator 200 of the same type, that is, the male end 100a of the optical fiber attenuator 100 in the present embodiment is plugged into the female end 200b of the other optical fiber attenuator 200 to realize connection, or the female end 100b of the optical fiber attenuator 100 in the present embodiment is plugged into the male end 200a of the other optical fiber attenuator 200 to realize connection.

In this embodiment, the male end 100a of the optical fiber attenuator 100 is plugged into the female end 200b of another optical fiber attenuator 200.

Referring to fig. 1-2, fig. 4-5 and fig. 8, specifically, a first groove 14a is concavely formed in the middle of the linkage member 115, an inclined protrusion 14b is disposed between the outermost end of the linkage member 115 and the groove, and a second groove 15a is disposed on the top of the housing 117 at the male end 100 a; the buckling piece 116 is provided with a first abutting part A which can generate displacement after being stressed relative to the first groove 14a, the buckling piece 116 is also provided with a second abutting part A1 which is integrally formed with the first abutting part A relative to the second groove 15a, the second abutting part A1 is arranged at two sides of the first abutting part A, and the second abutting part A1 can move along with the displacement of the first abutting part A through the integral connection of the second abutting part A1 and the first abutting part A; further, the housing 117 in the present embodiment is further provided with a first stop surface D located at the male end 100a and a second stop surface E located at the female end 100 b; when the first stop surface D of the optical fiber attenuator 100 and the second stop surface E of the other optical fiber attenuator 200 are in contact with each other, the male end 100a of the optical fiber attenuator 100 is plugged into the female end 200b of the other optical fiber attenuator 200; defining that when the first abutting portion a of the other optical fiber attenuator 200 and the first groove 14a or the protruding portion 14B of the previous optical fiber attenuator 100 abut against each other, a point at which the first abutting portion a abuts against the first groove 14a is a locking point B, and a point at which the first abutting portion a abuts against the protruding portion 14B is an unlocking point C; after the optical fiber attenuator 100 is inserted into the female end 200B of the other optical fiber attenuator 200, the structural relationship among the first abutting portion a, the locking point B, the first stopping surface D, and the second stopping surface E satisfies the following limitations: the distance AE from the first abutting part A to the second stop surface E along the axial direction is equal to the distance BD from the locking point B to the first stop surface D; when the structural relation among the first abutting part A, the unlocking point C, the first stopping surface D and the second stopping surface E meets the following limit, namely: the distance AE from the first abutment portion a to the second stop surface E in the axial direction is equal to the distance CD from the unlocking point C to the first stop surface D, and at this time, the optical fiber attenuator 100 may be pulled out from the other optical fiber attenuator 200.

The principle in the scheme is as follows: when the optical fiber attenuator 100 needs to be plugged into the other optical fiber attenuator 200, the linkage member 115 enters the female end 200B of the other optical fiber attenuator 200 along with the locking member 210 and pushes up the first abutting portion a through the protruding portion 14B, at this time, the first abutting portion D and the second abutting portion E are not abutted yet, the distance AE from the first abutting portion a to the second abutting portion E along with the movement of the linkage member 115 is greater than the distance CD from the unlocking point C to the first abutting portion D, as the male end 100a gradually approaches the female end 200B of the other optical fiber attenuator 200 until the first abutting portion D and the second abutting portion E abut against each other, at this time, the distance AE from the first abutting portion a to the second abutting portion E along with the axial direction is equal to the distance BD from the locking point B to the first abutting portion D, and the first groove 14a keeps horizontal with the second groove 15a, so that the first abutting portion a is clamped into the first groove 14a, and the second abutting portion A1 is clamped into the second groove 15a, thereby realizing that the first optical fiber attenuator 200B is clamped into the female end 100B of the other optical fiber attenuator.

In one case, when the distance AE from the first abutment a to the second stop surface E in the axial direction is smaller than the distance BD from the locking point B to the first stop surface D, the optical fiber attenuator 100 maintains the locked state with the other optical fiber attenuator 200, and when the distance AE from the first abutment a to the second stop surface E in the axial direction is larger than the distance BD from the locking point B to the first stop surface D, but the distance AE from the first abutment a to the second stop surface E in the axial direction is smaller than the distance CD from the unlocking point C to the first stop surface D, the optical fiber attenuator 100 maintains the locked state with the other optical fiber attenuator 200, but the locking effect is poor; in another case, when the distance AE from the first abutment portion a to the second stop surface E in the axial direction is greater than the distance CD from the unlocking point C to the first stop surface D, the optical fiber attenuator 100 and the other optical fiber attenuator 200 are unlocked from each other.

According to the above-described aspect, it can be understood that, when the distance AE from the first abutment portion a to the second stop surface E in the axial direction is smaller than or equal to the distance BD from the locking point B to the first stop surface D, the optical fiber attenuator 100 is in a best locked state with the other optical fiber attenuator 200; when the distance BD from the locking point B to the first stopping surface D is smaller than or equal to the distance AE from the first abutting part A to the second stopping surface E along the axial direction and smaller than the distance CD from the unlocking point C to the first stopping surface D, the optical fiber attenuator 100 and the other optical fiber attenuator 200 still maintain a locked state, but the locking effect is poor; when the distance AE from the first abutting portion a to the second stop surface E along the axial direction is greater than or equal to the distance CD from the unlocking point C to the first stop surface D, the optical fiber attenuator 100 and the other optical fiber attenuator 200 are mutually unlocked.

It can be appreciated that when the user needs to pull out the optical fiber attenuator 100 in the present embodiment, the locking member 210 is pulled to displace the locking member 210 relative to the housing 117, at this time, the linkage member 115 moves along with the movement of the locking member 210 and separates the first groove 14a from the first abutting portion a, the second groove 15a separates from the second abutting portion A1, and then the protrusion 14b on the linkage member 115 abuts against the first abutting portion a and gradually applies an interaction force to the buckling member 116 during the movement of the locking member 210, so that the buckling member 116 is deformed and bent, and at this time, the optical fiber attenuator 100 can be taken out from the accessed optical fiber attenuator 200; in this process, when the locking member 210 is moved in the axial direction to extract the attenuating ferrule 110, the shell top 151 exerts a supporting force on the top plate 211 to bring the integral optical fiber attenuator 100 out of the female end 200b of the other optical fiber attenuator 200.

From the foregoing, it can be appreciated that the optical fiber attenuator 100 in this embodiment can be inserted into the female end of the optical fiber connector to be attenuated or the female end 200b of another optical fiber attenuator 200 through the linkage element 115 to form an attenuation device with higher attenuation capability, and can be inserted into the male end 200a of the optical fiber connector to be attenuated or the male end 200a of another optical fiber attenuator 200 through the fastener 116 to form an attenuation device with higher attenuation capability. The optical fiber attenuator 100 of the present embodiment is structurally designed for an optical fiber connector or an optical fiber attenuator 200 of the same type, and if the male end 200a or the female end 200b of the optical fiber attenuator can be adapted to the optical fiber attenuator of the present embodiment, the optical fiber attenuator can be accessed for other optical fiber connectors or optical fiber attenuators of different types, which is not described herein.

Referring to fig. 2, 6-7, and 9-10, according to the above-mentioned scheme, the inner side wall of the side plate 215 protrudes toward the shell side 152 to form a first limiting portion 221, and the distal end of the linkage 115 protrudes toward both sides to form a second limiting portion 141; the first limiting portion 221 and the second limiting portion 141 are configured to limit a moving direction of the locking piece 210, so that the locking piece 210 can only perform reciprocating linear motion along an axial direction after being limited by the first limiting portion 221 and the second limiting portion 141, and the effect of movably connecting the locking piece 210 on the housing 117 is better, so as to further realize access to the attenuation ferrule 110 and the attenuation ferrule 110 on the other optical fiber attenuator 200; further, the shell side 152 is provided with a first movable slot 15e corresponding to the first limiting portion 221, where the first movable slot 15e is used to limit the movable range of the first limiting portion 221, so that the first limiting portion 221 reciprocates in the first movable slot 15e from one end to the other end along with the movement of the locking member 210, and it can be understood that the height of the first movable slot 15e in the embodiment is slightly higher than that of the first limiting portion 221, so that the moving line of the locking member 210 in the reciprocating rectilinear motion keeps horizontal, and the problem that the limiting effect of the first limiting portion 221 is not expected due to the excessively high design of the first movable slot 15e is avoided.

Referring to fig. 1-3, optionally, a first marking groove 20a and a second marking groove 20b for marking the attenuation core pin 110 are concavely formed at an end of the top plate 211 away from the linkage 115; further, the attenuating ferrule 110 includes a first attenuating optical fiber 121 and a second attenuating optical fiber 122 disposed in parallel along an axial direction, a projection of the first marking groove 20a coincides with an extending direction of the first attenuating optical fiber 121, and a projection of the second marking groove 20b coincides with an extending direction of the second attenuating optical fiber 122; the first attenuation optical fiber 121 is marked by the first marking groove 20a, and the second attenuation optical fiber 122 is marked by the second marking groove 20b, so that the attenuation ferrule 110 can be more accurate when other optical fibers are connected, and the butt joint error of the attenuation ferrule 110 is prevented.

Referring to fig. 1, fig. 4-5, and fig. 9-10, optionally, the housing 117 in the embodiment is further provided with a second movable slot 15f at the male end 100a for the second limiting portion 141 to move, where the second movable slot 15f is used for limiting the moving range of the second limiting portion 141, so that the second limiting portion 141 reciprocates from one end to the other end in the second movable slot 15f along with the movement of the locking member 210; in this embodiment, the maximum moving distance of the locking member 210 is equal to the length of the movable space 21b, and the length of the movable space 21b is less than or equal to the maximum moving length of the first limiting portion 221 in the first movable slot 15e, and the maximum moving length of the first limiting portion 221 in the first movable slot 15e is equal to the maximum moving length of the second limiting portion 141 in the second movable slot 15 f.

Referring to fig. 4-5 and fig. 6-7, specifically, when the male end 100a of the optical fiber attenuator 100 in the present embodiment is inserted into the female end 200b of another optical fiber attenuator 200, the locking member 210 is pushed to slide the linkage member 115 into the female end 200b of the other optical fiber attenuator 200 and press the linkage member and the buckling member 116 together for clamping, so as to realize the connection of the optical fiber attenuators 100; when the optical fiber attenuator 100 needs to be pulled out, the locking piece 210 needs to be pulled to move relative to the housing 117, and the top plate 211 of the locking piece 210 is in abutting connection with the top shell 151 of the housing 117, so that the top shell 151 of the housing 117 generates supporting force on the top plate 211, and the locking piece 210 can drive the whole optical fiber attenuator 100 to be pulled out from the inserted optical fiber connector, so that the whole supporting strength of the housing 117 is increased, and the structural firmness of the housing 117 and the locking piece 210 in interaction can be ensured to meet a higher expected level; further, the locking piece 210 further comprises a support plate 212 which is arranged opposite to the axial direction and fixedly connected with the side plate 215, the support plate 212 extends towards the shell side 152 and is provided with a reinforcing rib 213, and the reinforcing rib 213 can abut against the shell side 152 along with the movement of pulling the locking piece 210; namely: pulling the locking member 210 causes the locking member 210 to move relative to the housing 117, and the reinforcing ribs 213 abut against the side portions 152 of the housing 117 along with the movement of the locking member 210, so that the side portions 152 of the housing 117 also generate supporting forces on the reinforcing ribs 213, thereby further increasing the supporting forces between the housing 117 and the locking member 210; in addition, the supporting plate 212 is further provided with a reinforcing layer 214 integrally formed with the reinforcing ribs 213 and the top plate 211, the reinforcing layer 214 is arranged at the joint of the supporting plate 212 and the top plate 211, the thickness of the reinforcing layer 214 extending from one side of the supporting plate 212 to the distal end is gradually reduced, in addition, the height of the reinforcing ribs 213 extending from one side of the supporting plate 212 to the distal end is gradually increased, the structure ensures the structural tightness between the locking piece 210 and the housing 117, and the overall structural strength of the housing 117 is further higher.

Referring to fig. 8-9, according to the above scheme, a plurality of reinforcing ribs 213 are provided, and any two adjacent reinforcing ribs 213 are equally spaced, so that the supporting stress is more uniform; alternatively, the reinforcing ribs 213 in the present embodiment are provided in two; in other embodiments, a different number of the reinforcing ribs 213 may be provided, and the number of the reinforcing ribs 213 is inversely proportional to the thickness of the reinforcing ribs 213, that is, the greater the number of the reinforcing ribs 213, the smaller the thickness of the reinforcing ribs 213, which is not limited herein; referring to fig. 1-2 and 8, further, an end of the first limiting portion 221 protruding into the first movable slot 15e and an end of the second limiting portion 141 protruding into the second movable slot 15f are both provided with a chamfer structure, and the chamfer structure reduces an area of a surface of the distal end of the first limiting portion 221 facing the first movable slot 15e, and reduces an area of a surface of the distal end of the second limiting portion 141 facing the second movable slot 15f, thereby reducing a volume of the first limiting portion 221 and saving an internal space.

1-2 And 9-11, preferably, the top plate 211 is provided with a first notch 21a at the center, and the first notch 21a leaves a movable space 21b along the axial direction on the peripheral side of the shell top 151 so that the top plate 211 can move relative to the shell top 151; the top 151 of the shell is penetrated through the top plate 211 through the first notch 21a, the side 152 of the shell is provided with the second notch 15g, the top 151 of the shell is provided with the third notch 15d, one side of the fastener 116 is fixedly clamped on the side 152 of the shell through the second notch 15g, and the top of the fastener 116 is fixedly clamped on the top 151 of the shell through the third notch 15d and is mutually abutted with the inner wall of the first notch 21a, so that the shell 117 and the locking piece 210 both generate supporting acting force on the fastener 116.

It can be understood that the fastening of the fastener is realized through three notches, thereby fix the fastener on the shell, and the shell lateral part supports the effect of effect through the second notch to the both sides of fastener, the shell top supports the effect of effect through the third notch to the top of fastener, thereby make the fastener firmly fixed in the shell, further make the roof move the in-process that the shell top is relative, fixed connection between the fastener is relative shell all the time, thereby the steadiness of fastener installation has been guaranteed, the structural rigidity between fastener and the shell has been promoted, thereby the fastener displacement's of fastener because structural rigidity is relatively poor easily appears after having avoided the fastener atress of fiber attenuator, the difficult pull out or the difficult condition of inserting has further been stopped to appear in fiber attenuator, the job stabilization nature of fiber attenuator has been promoted.

Referring to fig. 9-11, in this embodiment, the second notch 15g extends axially to the port of the female end 100b of the optical fiber attenuator 100, and the fastener 116 slides into the second notch 15g from the port of the female end 100b of the optical fiber attenuator 100 through this structure; further, the shell top 151 protrudes and is disposed in the first notch 21a and protrudes outwards to be flush with the end surface of the top plate 211 through the first notch 21a, so that the production cost of the locking piece 210 is saved, the whole volume of the optical fiber attenuator 100 is reduced, and the plugging convenience of the optical fiber attenuator 100 is improved.

As shown in fig. 11, preferably, a clamping portion 153 is further disposed between two ends of the housing 117 along the axial direction, the optical fiber attenuator 100 further includes a ferrule fixing cap 111 that is clamped and fixed in the housing 117 by the clamping portion 153, and the ferrule fixing cap 111 is sleeved on the attenuation ferrule 110 so as to fix the attenuation ferrule 110; further, the optical fiber attenuator 100 is provided with guide grooves 15h at both the male end 100a and the female end 100b of the housing 117 for plugging an external optical fiber connector, and the optical fiber attenuator 100 is more easily plugged when plugged or plugged through the guide grooves 15 h.

Preferably, the attenuation core insert 110 in the optical fiber attenuator 100 in this embodiment is configured as a single-link dual-core structure, so that two optical fibers can be simultaneously attenuated by the single-link dual-core structure of one optical fiber attenuator 100 under the condition that a large number of data centers and machine rooms with large requirements are required to be attenuated, so that the optical fiber attenuator 100 has a multi-frequency attenuation function.

Referring to fig. 7 and 10, according to the above-mentioned scheme, in another embodiment, the attenuating ferrule 110 in the optical fiber attenuator 100 is configured as a duplex four-core structure, in which the housing 117 of the optical fiber attenuator 100 can accommodate two attenuating ferrules 110 of a two-core structure disposed side by side, and the structure of the locking member 210 is designed as an integral structure integrally connected and covering the housing 117; furthermore, the attenuation core 110 in the optical fiber attenuator 100 may be configured as a quad-eight-core structure, and further stacked on the basis of the structure of the optical fiber attenuator 100 with a dual-quad-four-core structure, so as to meet the multi-frequency attenuation requirements of some data centers with huge requirements and machine rooms under the condition that more optical fibers need to be attenuated.

In summary, the present invention provides an optical fiber attenuator, when the optical fiber attenuator needs to be pulled out, the locking piece needs to be pulled to move relative to the housing, and the movement makes the top plate of the locking piece abut against the top plate of the housing, so that the top plate of the housing generates supporting force, and the locking piece can drive the whole optical fiber attenuator to be pulled out from the inserted optical fiber connector.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical fiber attenuator, an accessible optical fiber connector, comprising:

A housing including a housing top;

2. A fiber optic attenuator according to claim 1, wherein: the locking piece further comprises side plates arranged on two sides of the top plate;

3. A fiber optic attenuator according to claim 2, wherein: the shell further comprises shell side parts arranged on two sides of the top of the shell, the inner side walls of the side plates are convexly provided with first limiting parts towards the shell side parts, and the far ends of the linkage pieces are convexly provided with second limiting parts towards two sides;

4. A fiber optic attenuator according to claim 3, wherein: a first movable groove corresponding to the first limiting part is formed in the side part of the shell, and the first limiting part moves in the first movable groove in a reciprocating mode along with the movement of the locking piece;

5. A fiber optic attenuator according to claim 3, wherein: the locking piece still include along the axial setting and with the fixed backup pad that links to each other of shell lateral part, the backup pad orientation shell lateral part extends and is equipped with the strengthening rib, just the strengthening rib is along with the removal of locking piece with shell lateral part butt or separation.

6. An optical fiber attenuator according to claim 5, wherein: the reinforcing ribs are arranged in a plurality, and any two adjacent reinforcing ribs are arranged at equal intervals.

7. A fiber optic attenuator according to claim 1, wherein: the shell top is convexly arranged in the first notch and is flush with the end face of the top plate.

8. A fiber optic attenuator according to claim 3, wherein: the shell side is provided with a second notch for one side of the fastener to be clamped in, the shell top is provided with a third notch for the top of the fastener to be clamped in, and the fastener is fixed in the shell through the second notch and the third notch.

9. An optical fiber attenuator according to claim 5, wherein: the supporting plate is also provided with a reinforcing layer which is integrally formed with the reinforcing rib and the top plate;

10. A fiber optic attenuator according to claim 3, wherein: the optical fiber attenuator is characterized in that a clamping part is further arranged between two ends of the shell along the axial direction, the optical fiber attenuator further comprises a core inserting fixing cap which is clamped and fixed with the clamping part, and the core inserting fixing cap is sleeved on the attenuation core inserting to fix the attenuation core inserting.