Tail fiber and optical device

Abstract

The utility model relates to the technical field of communication, in particular to a tail fiber and an optical device. The tail fiber comprises a connector and an optical fiber, a via hole is formed in the connector in a penetrating mode, the optical fiber is arranged in the connector in a penetrating mode through the via hole, one end of the connector is provided with a containing groove, the containing groove is communicated with the via hole, the optical fiber is sleeved with a loose tube, and the loose tube is communicated with the containing groove. The loose tube is located in the containing groove and part of the via holes, and the containing groove is filled with a soft rubber layer. By adopting the above mode, the side tension resistance of the optical fiber can be improved, and the stability of signal transmission is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of communication, in particular to a pigtail and an optical device. Background Art

[0002] Optoelectronic information technology is a multidisciplinary integrated technology that combines optics, optoelectronics, microelectronics and other technologies. It involves many aspects such as the radiation, transmission, detection of optical information, and the conversion, storage, processing and display of optoelectronic information. Optoelectronic information technology is widely used in all walks of life in the national economy and national defense construction. In recent years, with the rapid development of the optoelectronic information technology industry, the demand for pigtails has also increased. Moreover, due to the requirement for miniaturization of products, some products require the pigtails to cancel the flexible tail sleeves.

[0003] However, after the flexible tail sleeve is removed from the pigtail, the pigtail is in direct and rigid contact with the connector, which affects the fiber's ability to resist lateral pulling. The fiber is easily damaged or even broken during use, which is not conducive to the stable transmission of the signal. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a pigtail and an optical device, which can improve the anti-lateral pulling ability of the optical fiber, thereby improving the stability of signal transmission.

[0005] The utility model discloses a pigtail, comprising: a connector and an optical fiber, wherein a via hole is provided in the connector, and the optical fiber is passed through the connector through the via hole, and a receiving groove is provided at one end of the connector, and the receiving groove is communicated with the via hole, a loose tube is sleeved on the optical fiber, and the loose tube is located in the receiving groove and part of the via hole, and the receiving groove is filled with a soft rubber layer.

[0006] Optionally, the accommodating groove is truncated cone-shaped or cylindrical.

[0007] Optionally, the depth of the accommodating groove is greater than 0.5 mm, and the maximum diameter of the accommodating groove is greater than or equal to 1.3 mm.

[0008] Optionally, the material of the soft glue layer is UV glue or silicone.

[0009] Optionally, the via hole includes a first inner hole and a second inner hole connected in sequence, the diameter of the first inner hole is larger than the diameter of the second inner hole, the first inner hole and the accommodating groove are respectively located at opposite ends of the second inner hole, a capillary is inserted into the first inner hole, and the core of the optical fiber passes through the capillary.

[0010] Optionally, a side wall of the second inner hole is provided with an annular groove, and the annular groove is filled with a hard rubber layer.

[0011] Optionally, the material of the hard glue layer is epoxy resin glue.

[0012] Optionally, a guide groove is provided at the end of the first inner hole away from the second inner hole.

[0013] Optionally, the outer ring of the connector has a stepped portion, and the connector is made of metal.

[0014] The utility model also discloses an optical device, comprising the pigtail as described in any one of the above.

[0015] Compared with the prior art, the beneficial effect of the pigtail and optical device provided by the utility model embodiment is: by the via hole provided in the connector, it is convenient to insert the optical fiber, in addition, by the accommodating groove provided at one end of the connector, and the accommodating groove is communicated with the via hole, when the loose tube set by the optical fiber follows the optical fiber to insert the via hole, the loose tube is located in the accommodating groove and part of the via hole, and when the soft glue layer is filled in the accommodating groove, the loose tube can be fixed at the soft glue layer. Under the effect of the loose tube, the optical fiber is protected from internal stress and external side pressure, and the probability of the optical fiber being damaged is reduced. Under the effect of the soft glue layer, not only can the loose tube be fixed, but also when the optical fiber is subjected to lateral tension, the stress buffer can be played, the lateral pulling resistance of the optical fiber pigtail is improved, the risk of fiber breaking during use is reduced, and the stability of signal transmission is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of the structure of the pigtail provided by the embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a connector provided by an embodiment of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of a connector provided by an embodiment of the utility model;

[0020] Figure 4 It is a cross-sectional schematic diagram of the pigtail provided by the embodiment of the utility model.

[0021] The reference numerals in the figures are:

[0022] 100, pigtail; 110, connector; 112, via; 1122, first inner hole; 1124, second inner hole; 1124a, annular groove; 114, accommodating groove; 116, guide groove; 118, step portion; 119, marking hole; 120, optical fiber; 130, loose tube; 140, soft rubber layer; 150, capillary; 160, hard rubber layer. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0024] The utility model embodiment provides a pigtail 100, such as Figures 1 to 4 As shown, the pigtail 100 includes: a connector 110 and an optical fiber 120, a via hole 112 is penetrated in the connector 110, the optical fiber 120 is passed through the via hole 112 in the connector 110, a receiving groove 114 is provided at one end of the connector 110, the receiving groove 114 is communicated with the via hole 112, a loose tube 130 is sleeved on the optical fiber 120, and the loose tube 130 is located in the receiving groove 114 and part of the via hole 112, and the receiving groove 114 is filled with a soft rubber layer 140.

[0025] Specifically, connector 110 facilitates optical fiber 120 and optical device alignment installation, in use, in order to ensure the reliability of pigtail 100 itself, loose tube 130 is also sleeved on optical fiber 120, loose tube 130 is usually made of polypropylene or nylon material, for protecting optical fiber 120 from internal stress and external side pressure, reducing the probability of optical fiber 120 being damaged. In addition, connector 110 is provided with an end of accommodating groove 114 for an end outside optical device, by the setting of accommodating groove 114, after optical fiber 120 passes through via 112, loose tube 130 is located in accommodating groove 114 and part via 112, and by the protection of soft glue layer 140 filled in accommodating groove 114, when optical fiber 120 is subjected to lateral tension, by the flexible buffering of soft glue layer 140, it is conducive to maximizing the anti-lateral pulling ability of optical fiber 120, reducing the risk of fiber breaking in use.

[0026] The pigtail 100 provided in the embodiment of the present application is convenient for inserting the optical fiber 120 by the through hole 112 that is set in the connector 110. In addition, by the accommodating groove 114 that is set at one end of the connector 110, and the accommodating groove 114 is connected with the through hole 112, when the loose tube 130 of the optical fiber 120 follows the optical fiber 120 to be inserted into the through hole 112, the loose tube 130 is located in the accommodating groove 114 and part of the through hole 112, and when the soft rubber layer 140 is filled in the accommodating groove 114, the loose tube 130 can be fixed at the soft rubber layer 140. Under the action of the loose tube 130, the optical fiber 120 is protected from the influence of internal stress and external side pressure, and the probability of damage to the optical fiber 120 is reduced. Under the action of the soft rubber layer 140, it can not only fix the loose tube 130, but also play a stress buffering role when the optical fiber 120 is subjected to lateral tension, thereby improving the lateral pulling resistance of the optical fiber 120 pigtail 100, reducing the risk of fiber breakage during use, and thus improving the stability of signal transmission.

[0027] In an optional embodiment of the present application, the receiving groove 114 is in a truncated cone shape or a cylindrical shape.

[0028] Specifically, when the receiving groove 114 is set to a truncated cone shape, the opening of the receiving groove 114 at the end face of the connector 110 is the largest, and the soft rubber layer 140 filled is also the largest. When the optical fiber 120 is subjected to lateral pulling force, the deformation of the optical fiber 120 at the end face of the connector 110 is also the largest, and the corresponding radial thickness of the soft rubber layer 140 is also the largest, which can cooperate well with the optical fiber 120 to provide a buffering force. When the receiving groove 114 is set to a cylindrical shape, the bottom of the cylinder can be a plane or an inclined surface, mainly to ensure that enough soft rubber layer 140 is filled. At this time, when the optical fiber 120 is subjected to lateral pulling force, the soft rubber layer 140 can be more deformable, which can better buffer the force for the optical fiber 120 to protect the optical fiber 120.

[0029] In an optional embodiment of the present application, the depth of the receiving groove 114 is greater than 0.5 mm, and the maximum diameter of the receiving groove 114 is greater than or equal to 1.3 mm.

[0030] Specifically, since the size of the connector 110 itself is small, the amount of the soft rubber layer 140 filled into the receiving groove 114 is limited. In order to ensure that the soft rubber layer 140 can play the required protective role, the depth of the receiving groove 114 needs to be set to be greater than 0.5 mm. At the same time, the maximum diameter of the receiving groove 114 is greater than or equal to 1.3 mm. If the size of the receiving groove 114 is too small, it may affect the required buffering.

[0031] In an optional embodiment of the present application, the material of the soft glue layer 140 is UV glue or silicone.

[0032] Specifically, the UV glue curing process requires ultraviolet irradiation, which can reach the final hardening state in a short time, which is conducive to improving the molding speed. When the UV glue is used, a soft glue type is used, and its own flexibility and buffering performance are used to protect the optical fiber 120. It can be understood that after the silicone is fixed and formed, it also has a certain flexibility and buffering performance to protect the optical fiber 120.

[0033] like Figure 3 and Figure 4 As shown, the via hole 112 includes a first inner hole 1122 and a second inner hole 1124 which are connected in sequence. The diameter of the first inner hole 1122 is larger than the diameter of the second inner hole 1124. The first inner hole 1122 and the accommodating groove 114 are respectively located at opposite ends of the second inner hole 1124. A capillary 150 is inserted into the first inner hole 1122, and the core of the optical fiber 120 passes through the capillary 150.

[0034] Specifically, a capillary 150 is inserted into the first inner hole 1122. By setting the diameter of the first inner hole 1122 to be larger than the diameter of the second inner hole 1124, after the capillary 150 is inserted into the connector 110, the insertion depth of the capillary 150 can be limited by the steps formed at the first inner hole 1122 and the second inner hole 1124. In addition, the loose sleeve 130 sleeved on the optical fiber 120 can abut against the capillary 150 and allow the core of the optical fiber 120 to pass through the capillary 150, which is beneficial to ensure the stability of the connection.

[0035] like Figure 3 and Figure 4 As shown, the side wall of the second inner hole 1124 is provided with an annular groove 1124 a , and the annular groove 1124 a is filled with a hard rubber layer 160 .

[0036] Specifically, by providing an annular groove 1124a on the side wall of the second inner hole 1124, it is helpful to accommodate more glue in the annular groove 1124a. After the loose tube 130 is inserted into the second inner hole 1124, as the glue solidifies to form a hard glue layer 160, it not only plays the role of bonding and fixing the loose tube 130, but also can enhance the longitudinal tension of the light (along the length direction of the connector 110), which is beneficial to ensure the stability of the pigtail 100 during use.

[0037] In an optional embodiment of the present application, the material of the hard glue layer 160 is epoxy resin glue. Epoxy resin glue has excellent bonding strength and can firmly bond various materials, including metal, plastic, glass, ceramic, etc., to form a lasting connection. By using epoxy resin glue, it is helpful to ensure the stability of the matching between the connector 110 and the loose tube 130.

[0038] like Figure 3As shown, a guide groove 116 is provided at the end of the first inner hole 1122 away from the second inner hole 1124 .

[0039] Specifically, the guide groove 116 provided at the end of the first inner hole 1122 away from the second inner hole 1124 can play a guiding role during the process of inserting the capillary 150 into the first inner hole 1122, which is conducive to the smooth insertion of the capillary 150 and reduces the difficulty of operation.

[0040] like Figure 2 As shown, the outer ring of the connector 110 has a stepped portion 118 , and the connector 110 is made of metal.

[0041] Specifically, the connector 110 can be made of copper, iron, aluminum or other materials, or a metal alloy, and can be flexibly set according to the use environment. In addition, by setting a joint portion on the outer ring of the connector 110, when the connector 110 is connected with the optical device, the connector 110 can be limited to ensure the alignment accuracy during assembly.

[0042] Please continue to refer to Figure 2 A marking hole 119 is also provided on the connector 110. During the matching process between the pigtail 100 and the optical device, if it is necessary to assemble and align at a specific angle, the marking hole 119 can be used as a reference, which is conducive to improving the convenience of assembly.

[0043] The utility model also discloses an optical device, including the pigtail 100 in the aforementioned embodiment. For example, the optical device can be a pigtail free space isolator (PFSI) of the pigtail 100, or a product such as a laser. The optical device includes the same structure and beneficial effects as the pigtail 100 in the aforementioned embodiment. The structure and beneficial effects of the pigtail 100 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0044] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A pigtail, characterized in that: include: A connector and an optical fiber, wherein a via hole is penetrated through the connector, and the optical fiber is passed through the connector through the via hole. A receiving groove is provided at one end of the connector, and the receiving groove is communicated with the via hole. A loose tube is sleeved on the optical fiber, and the loose tube is located in the receiving groove and part of the via hole, and the receiving groove is filled with a soft rubber layer.

2. The pigtail according to claim 1, characterized in that: The containing groove is in a truncated cone shape or a cylindrical shape.

3. The pigtail according to claim 2, characterized in that: The depth of the accommodating groove is greater than 0.5 mm, and the maximum diameter of the accommodating groove is greater than or equal to 1.3 mm.

4. The pigtail according to claim 1, characterized in that: The material of the soft glue layer is UV glue or silica gel.

5. The pigtail according to any one of claims 1 to 4, characterized in that: The via hole includes a first inner hole and a second inner hole connected in sequence, the diameter of the first inner hole is larger than the diameter of the second inner hole, the first inner hole and the accommodating groove are respectively located at opposite ends of the second inner hole, a capillary is inserted into the first inner hole, and the core of the optical fiber passes through the capillary.

6. The pigtail according to claim 5, characterized in that: The side wall of the second inner hole is provided with an annular groove, and the annular groove is filled with a hard rubber layer.

7. The pigtail according to claim 6, characterized in that: The material of the hard glue layer is epoxy resin glue.

8. The pigtail according to claim 5, characterized in that: A guide groove is provided at the end of the first inner hole away from the second inner hole.

9. The pigtail according to any one of claims 1 to 4, characterized in that: The outer ring of the connecting head has a stepped portion, and the connecting head is made of metal.

10. An optical device, characterized in that: The pigtail comprises the pigtail described in any one of claims 1 to 9.

Images