Micro-bending-resistant butterfly cable optical fiber connector

Abstract

The invention relates to the technical field of communication, in particular to a micro-bending-resistant butterfly cable optical fiber connector, which comprises a pin, an elastic piece, an inner shell, a stopper and a staple bolt, a first limiting part and a second limiting part are arranged in the inner shell, the pin is provided with a third limiting part, the pin is arranged in the inner shell in a penetrating manner, the third limiting part is propped against the first limiting part to prevent the pin from penetrating out of the inner shell, and the elastic piece is arranged in the inner shell. The elastic piece is arranged in the inner shell, the two ends of the elastic piece abut against the second limiting part and the third limiting part respectively, one end of the contact pin is arranged in the inner shell in an exposed mode, and the contact pin is provided with a through hole in the axis direction of the contact pin. One end of the backstop is connected with the inner shell, the backstop is provided with a channel through which the optical fiber penetrates, the staple bolt is connected with the backstop to fix a butterfly cable, and the optical fiber sequentially penetrates through the channel, the inner shell and the through hole. According to the micro-bending-resistant butterfly cable optical fiber connector provided by the embodiment of the invention, the purpose that the optical fiber of the butterfly cable can resist micro bending can be achieved.

Description

Technical Field

[0001] The invention relates to the field of communication technology, and in particular to a micro-bend resistant butterfly cable optical fiber connector. Background Art

[0002] In recent years, as the depth and breadth of FTTH (Fiber to the Home) network coverage continues to increase, the market demand for butterfly-shaped prefabricated optical cable assemblies has increased, and FTTH network cabling technology has continued to mature. Under the current severe market competition pressure, how to achieve the best network cabling at the lowest cost has become a new issue facing telecom operators.

[0003] The butterfly optical cables currently used in FTTH wiring are mainly G657A2 optical fibers. This type of optical fiber has excellent bending performance. Without affecting the performance, the minimum bending radius is 7.5mm, but the cost is 1.2 times that of G657A1 optical fiber. The minimum bending radius of G657A1 optical fiber is only 10mm. After exceeding the minimum bending radius of the optical fiber, the signal attenuation increases sharply. After the prefabrication and assembly of G657A1 optical fiber butterfly optical cable and SC / APC butterfly optical fiber connector, the network transmission signal is often unstable due to the poor bending performance of the optical fiber. Solving the problem of SC / APC butterfly optical fiber connector's resistance to micro-bending is the key to reducing the wiring cost by using G657A1 optical fiber for FTTH wiring. Summary of the invention

[0004] The present invention provides a micro-bending resistant butterfly cable optical fiber connector, which is used to achieve the purpose of making the optical fiber of the butterfly optical cable resistant to micro-bending.

[0005] The present invention proposes a micro-bend resistant butterfly cable optical fiber connector, comprising a pin, an elastic member, an inner shell, a stopper and a staple, wherein a first limiting portion and a second limiting portion are provided in the inner shell, the pin has a third limiting portion, the pin is passed through the inner shell, and the third limiting portion abuts against the first limiting portion to prevent the pin from passing through the inner shell, the elastic member is provided in the inner shell, and the two ends of the elastic member abut against the second limiting portion and the third limiting portion respectively, one end of the pin is exposed in the inner shell and the pin is provided with a through hole along the axial direction of the pin; one end of the stopper is connected to the inner shell, the stopper has a channel for passing the optical fiber, the staple is connected to the stopper to fix the butterfly cable, and the optical fiber passes through the channel, the inner shell and the through hole in sequence.

[0006] According to one embodiment of the present invention, a dust cap is further included, and the dust cap is used to be sleeved on the end of the pin exposed from the inner shell.

[0007] According to an embodiment of the present invention, the stopper is provided with an anti-foolproof portion, and the anti-foolproof portion is used to prevent the butterfly cable from entering the channel.

[0008] According to one embodiment of the present invention, the cross section of the channel is circular with a diameter of 3.5-3.7 mm.

[0009] According to one embodiment of the present invention, the length of the channel is 22-25 mm.

[0010] According to one embodiment of the present invention, the length of the pin exposed from the inner shell is 1.8-1.95 mm.

[0011] According to an embodiment of the present invention, the stopper has an assembly structure, and the assembly structure is interference-fitted with the inner shell to connect the inner shell and the stopper.

[0012] According to an embodiment of the present invention, the inner shell is provided with elastic clamping parts arranged opposite to each other, and the assembly structure includes an annular boss, and the annular boss is used to abut against the inner wall surface of the elastic clamping part.

[0013] According to an embodiment of the present invention, the assembly structure further comprises a clamping platform, which is disposed on the annular boss and is used to abut against side edges of two adjacent elastic clamping portions.

[0014] According to one embodiment of the present invention, it also includes an outer shell, which is provided with a fourth limiting portion and a fifth limiting portion, and the inner shell is provided with a limiting platform, and the limiting platform cooperates with the fourth limiting portion and the fifth limiting portion so that the inner shell and the outer shell can only move between the fourth limiting portion and the fifth limiting portion; the outer shell is also provided with a fixing portion, and the fixing portion is used to be clamped with the adapter.

[0015] Implementing the embodiments of the present invention has the following beneficial effects:

[0016] When using the micro-bend resistant butterfly cable optical fiber connector of this embodiment, the staples fix the butterfly cable, and the optical fiber in the butterfly cable extends out and passes through the stopper, the inner shell and the pin in sequence. Among them, the pin is limited to move the distance between the first limit part and the second limit part, and one end of the pin is exposed from the inner shell. When the pin is squeezed, the pin squeezes the elastic member to move in the direction of the second limit part. When the squeeze on the pin is removed, the pin begins to reset under the force of the elastic member, and the third limit part of the pin begins to abut against the first limit part of the inner shell. In the process of the movement of the pin, the movement of the optical fiber is driven, and because the stopper has a channel, the optical fiber is allowed to make appropriate bends. Thereby achieving the purpose that the optical fiber of the butterfly optical cable can resist micro-bending. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] in:

[0019] Figure 1 It is a schematic diagram of explosion decomposition of an embodiment of a microbend-resistant butterfly cable optical fiber connector of the present invention;

[0020] Figure 2 It is a schematic diagram of explosion and decomposition from another angle of one embodiment of the microbend-resistant butterfly cable optical fiber connector of the present invention;

[0021] Figure 3 is a cross-sectional schematic diagram of the microbend-resistant butterfly cable optical fiber connector of the present invention;

[0022] Figure 4 It is a cross-sectional schematic diagram of the micro-bend resistant butterfly cable optical fiber connector of the present invention in a use state;

[0023] Figure 5 This is a schematic diagram of optical fiber bending in the micro-bend resistant butterfly cable optical fiber connector of the present invention;

[0024] Figure 6 It is a schematic diagram of the overall structure of a stopper in an embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of the assembly structure of a stopper and an inner shell in one embodiment of the present invention.

[0026] Reference numerals:

[0027] Pin-10; elastic member-20; inner shell-30; stopper-40; staple-50; first limiting portion-310; second limiting portion-320; third limiting portion-110; butterfly cable-60; optical fiber-610; dust cap-70; tail sleeve-80; head-120; tail-130; foolproof portion-410; assembly structure-420; elastic clamping portion-330; annular boss-4210; clamping platform-4220; outer shell-90; fourth limiting portion-910; fifth limiting portion-920; limiting platform-340; fixing portion-930; adapter-100. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The embodiment of the present invention provides a microbend-resistant butterfly cable optical fiber connector, please refer to Figure 1-7 , comprising a pin 10, an elastic member 20, an inner shell 30, a stopper 40 and a staple 50, wherein a first limiting portion 310 and a second limiting portion 320 are provided in the inner shell 30, the pin 10 has a third limiting portion 110, the pin 10 is passed through the inner shell 30, and the third limiting portion 110 abuts against the first limiting portion 310 to prevent the pin 10 from passing through the inner shell 30, the elastic member 20 is provided in the inner shell 30, and both ends of the elastic member 20 abut against the second limiting portion 320 and the third limiting portion 110 respectively, one end of the pin 10 is exposed in the inner shell 30 and the pin 10 is provided with a through hole along the axial direction of the pin 10 (not shown in the figure); one end of the stopper 40 is connected to the inner shell 30, the stopper 40 has a channel for passing the optical fiber 610 (not shown in the figure), the staple 50 is connected to the stopper 40 to fix the butterfly cable 60, and the optical fiber 610 passes through the channel, the inner shell 30 and the through hole in sequence (not shown in the figure).

[0030] When using the microbend-resistant butterfly cable optical fiber connector of this embodiment, the staple 50 fixes the butterfly cable 60, and the optical fiber 610 in the butterfly cable 60 extends out and passes through the stopper 40, the inner shell 30 and the pin 10 in sequence. Among them, the pin 10 is limited to move in the distance between the first limit portion 310 and the second limit portion 320, and one end of the pin 10 is exposed from the inner shell 30. When the pin 10 is squeezed, the pin 10 squeezes the elastic member 20 to move in the direction of the second limit portion 320. When the squeezing of the pin 10 is removed, under the action of the elastic member 20, the pin 10 begins to reset, and the third limit portion 110 of the pin 10 begins to abut against the first limit portion 310 of the inner shell 30. In the process of the movement of the pin 10, the movement of the optical fiber 610 is driven. Since the stopper 40 has a channel, the optical fiber 610 is allowed to bend appropriately. Thereby, the purpose of the optical fiber 610 of the butterfly optical cable being able to resist microbending is achieved.

[0031] It should be noted that when the pin 10 is fully retracted into the inner shell 30 , although the optical fiber 610 in the channel is bent, the optical fiber 610 needs to not abut against the inner wall surface of the channel to avoid causing a rapid drop in the signal of the optical fiber 610 .

[0032] Generally speaking, the elastic member 20 is mostly a spring. An inner shell 30 is provided in the middle of the spring to avoid contact between the spring and the optical fiber 610.

[0033] In one embodiment, a dust cap 70 is further included. The dust cap 70 is used to cover the end of the pin 10 exposed from the inner shell 30 .

[0034] The dust cap 70 is used to protect the optical fiber 610 before the optical fiber connector is assembled, so as to prevent dust from contaminating the optical fiber 610 and causing the signal of the optical fiber 610 to weaken.

[0035] In one embodiment, a tail sleeve 80 is further included. The tail sleeve 80 is sleeved on the stopper 40 to shield the exposed optical fiber 610 in the butterfly cable 60 .

[0036] The tail sleeve 80 is also provided to protect the optical fiber 610 from being contaminated. During use, the outer shell 90 of the butterfly cable needs to be cut off to expose the optical fiber 610. Therefore, the exposed part of the optical fiber 610 is easily contaminated with dust, and the optical fiber 610 is easily bent when the optical fiber 610 is exposed. The tail sleeve 80 can also strengthen the strength of the exposed part of the optical fiber 610 to prevent the optical fiber 610 from bending.

[0037] In one embodiment, the pin 10 includes a head portion 120 and a tail portion 130 , the head portion 120 is made of a ceramic material, and the tail portion 130 is made of a metal material.

[0038] The design of the fiber optic connector pin 10 with ceramic at one end and metal at the other end is mainly based on the material properties and the functional requirements of the connector. Ceramic ferrules (usually made of zirconium dioxide) are widely used in fiber optic connectors due to their good thermal stability, high hardness, high melting point, wear resistance and high processing accuracy. These characteristics enable the ceramic ferrule to maintain precise center alignment when the optical fiber 610 is docked, thereby minimizing the loss of optical signals and ensuring the stability and reliability of signal transmission.

[0039] The metal end is usually used as the sleeve or flange part of the connector for the installation and fixation of the connector. The metal material has good mechanical strength and thermal conductivity, can provide stable physical support and heat dissipation performance, and is also convenient for connection with other devices or optical fiber 610. The inner diameter of the metal sleeve is designed to be slightly smaller than the outer diameter of the ferrule, and the two ferrules are clamped together by the slotted sleeve to achieve precise alignment.

[0040] In summary, the use of ceramic material at one end of the optical fiber connector pin 10 is to ensure the accuracy and optical performance of the optical fiber 610 connection, while the use of metal material at the other end is to provide mechanical stability and facilitate installation and fixation. This design enables the optical fiber connector to play a key role in the optical communication system and achieve efficient and stable optical signal transmission.

[0041] In one embodiment, the stopper 40 is provided with an anti-fool portion 410, and the anti-fool portion 410 is used to prevent the butterfly cable 60 from entering the channel.

[0042] Please refer to Figure 6 The fool-proof portion 410 is used to prevent the butterfly cable from entering the channel.

[0043] In one embodiment, the cross section of the channel is circular with a diameter of 3.5-3.7 mm.

[0044] In one embodiment, the length of the channel is 22-25 mm.

[0045] The spring is assembled on the pin 10 and fixed in the space where the inner shell 30 and the stopper 40 are assembled. The spring controls the docking force between the pin 10 and the adapter 100 through its own elastic force. Please refer to the requirements of my country's communication industry standard YD / T1272.3. Figure 3 When the dimension H is 7.0 mm ± 0.1 mm, the elastic force of the pin 10 should be 7.8 to 11.8 N. The product of the present invention controls the H value to 7.4-7.5 mm by designing the number of coils of the spring and the spring elastic force. The elastic force of the pin 10 is still 7.8 to 11.8 N. By reducing the retraction amount of the pin 10 when the connector and the adapter 100 are docked, the bending amount of the optical fiber 610 in the stopper 40 is achieved.

[0046] The above is obtained through actual calculation that the cross-sectional diameter of the channel is a circle of 3.5-3.7 mm and the length of the channel is between 22-25 mm to achieve the best effect, that is, to keep the optical fiber 610 able to bend appropriately without affecting the communication effect of the optical fiber 610.

[0047] In one embodiment, the stopper 40 is made of a transparent material.

[0048] The stopper 40 is made of a transparent material, generally a transparent resin material, so that it can be observed whether the bending of the optical fiber 610 in the channel meets the requirements and whether it contacts the inner wall surface of the channel.

[0049] In one embodiment, the length of the pin 10 exposed from the inner shell 30 is 1.8-1.95 mm.

[0050] The pin 10 is composed of a ceramic column and a metal tail handle. The default length of the ceramic column in the connector industry is 8.0-8.15mm, and the exposed length when assembled to the connector is 1.8-1.95mm. To ensure that the pin 10 is properly stressed after docking with the adapter 100, the ceramic column length of this product is designed to be 7.95-8.0mm, and the exposed length when assembled to the connector is 1.75-1.8mm. By shortening the exposed length, the elastic force generated when docking with the adapter 100 is reduced.

[0051] In one embodiment, please refer to Figure 6 and Figure 7The stopper 40 has an assembly structure 420 , and the assembly structure 420 is interference-fitted with the inner shell 30 to connect the inner shell 30 and the stopper 40 .

[0052] The assembly structure 420 is mainly used to achieve connection with the inner shell 30. The assembly structure 420 and the inner shell 30 are connected together through interference fit.

[0053] In one embodiment, the inner shell 30 is provided with elastic clamping parts 330 arranged opposite to each other, and the assembly structure 420 includes an annular boss 4210 , which is used to abut against the inner wall surface of the elastic clamping parts 330 .

[0054] The material of the inner shell 30 is generally plastic, which has a certain elastic force. In order to further increase the elastic force of the connection between the inner shell 30 and the stopper 40, an elastic clamping part 330 is provided on the inner shell 30 to increase the elastic force of the connection. The diameter of the annular boss 4210 is slightly wider than the distance between the elastic clamping parts 330, so that the elastic clamping part 330 can clamp the annular boss 4210.

[0055] In one embodiment, the assembly structure 420 further includes a clamping platform 4220 , which is disposed on the annular boss 4210 and is used to abut against side edges of two adjacent elastic clamping portions 330 .

[0056] The clamping platform 4220 is used to further strengthen the connection strength between the stopper 40 and the inner shell 30. The clamping platform 4220 is located between the two elastic clamping claws, and the width of the clamping platform 4220 is slightly wider than the distance between the side edges of the two elastic clamping parts 330. The clamping platform 4220 can also play a role in guiding the installation, so that the relative positions of the stopper 40 and the inner shell 30 after installation are consistent.

[0057] In one embodiment, it also includes an outer shell 90, which is provided with a fourth limiting portion 910 and a fifth limiting portion 920, and the inner shell 30 is provided with a limiting platform 340, which cooperates with the fourth limiting portion 910 and the fifth limiting portion 920 so that the inner shell 30 and the outer shell 90 can only move between the fourth limiting portion 910 and the fifth limiting portion 920.

[0058] The inner shell 30 is generally nested in the outer shell 90. After the inner shell 30 and the outer shell 90 are installed, the outer shell 90 and the inner shell 30 can move relative to each other along the axial direction of the inner shell 30, but the movement range is generally limited between the fourth limit portion 910 and the fifth limit portion 920.

[0059] In one embodiment, the housing 90 is further provided with a fixing portion 930 , and the fixing portion 930 is used for snapping with the adapter 100 .

[0060] The adapter 100 is used to connect two connectors, and its main function is to clamp and fix the two connectors. The fixing portion 930 on the housing 90 is matched with the adapter 100 and can play a clamping role.

[0061] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0063] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A microbend-resistant butterfly cable optical fiber connector, characterized in that: It includes a pin, an elastic member, an inner shell, a stopper and a staple, wherein a first limiting portion and a second limiting portion are arranged in the inner shell, the pin has a third limiting portion, the pin is passed through the inner shell, and the third limiting portion abuts against the first limiting portion to prevent the pin from passing through the inner shell, the elastic member is arranged in the inner shell, and the two ends of the elastic member abut against the second limiting portion and the third limiting portion respectively, one end of the pin is exposed in the inner shell and the pin is provided with a through hole along the axial direction of the pin; one end of the stopper is connected to the inner shell, the stopper has a channel for passing the optical fiber, the staple is connected to the stopper to fix the butterfly cable, and the optical fiber passes through the channel, the inner shell and the through hole in sequence.

2. The microbend-resistant butterfly cable optical fiber connector according to claim 1, characterized in that: It also includes a dust cap, which is used to cover the end of the pin exposed from the inner shell.

3. The microbend-resistant butterfly cable optical fiber connector according to claim 1, characterized in that: The stopper is provided with an anti-foolproof portion, and the anti-foolproof portion is used to prevent the butterfly cable from entering the channel.

4. The microbend-resistant butterfly cable optical fiber connector according to claim 1, characterized in that: The cross section of the channel is circular with a diameter of 3.5-3.7 mm.

5. The microbend-resistant butterfly cable optical fiber connector according to claim 1, characterized in that: The length of the channel is 22-25 mm.

6. The microbend-resistant butterfly cable optical fiber connector according to claim 1, characterized in that: The length of the pin exposed from the inner shell is 1.8-1.95 mm.

7. The microbend-resistant butterfly cable optical fiber connector according to claim 1, characterized in that: The stopper has an assembly structure, and the assembly structure is interference-fitted with the inner shell to connect the inner shell and the stopper.

8. The microbend-resistant butterfly cable optical fiber connector according to claim 7, characterized in that: The inner shell is provided with elastic clamping parts which are arranged opposite to each other, and the assembly structure comprises an annular boss which is used to abut against the inner wall surface of the elastic clamping parts.

9. The microbend-resistant butterfly cable optical fiber connector according to claim 8, characterized in that: The assembly structure further comprises a clamping platform, which is arranged on the annular boss and is used for abutting against the side edges of two adjacent elastic clamping parts.

10. The microbend-resistant butterfly cable optical fiber connector according to claim 1, characterized in that: It also includes an outer shell, which is provided with a fourth limiting portion and a fifth limiting portion, and the inner shell is provided with a limiting platform, which cooperates with the fourth limiting portion and the fifth limiting portion so that the inner shell and the outer shell can only move between the fourth limiting portion and the fifth limiting portion; the outer shell is also provided with a fixing portion, which is used to be clamped with the adapter.

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