Opto-electric combined MPO ferrule assembly and preparation method

Abstract

The application discloses a photoelectric combined MPO ferrule assembly and a preparation method, relates to the technical field of MPO ferrules, and comprises a mounting seat, a ferrule, a conductive guide structure, a conductive elastic piece, an optical cable, a multi-fiber optical fiber and a cable. In the case of meeting the requirement of transmitting optical signals, the cable, the conductive elastic piece and the conductive guide structure form an electric signal transmission line. On the one hand, the MPO ferrule assembly can simultaneously realize the transmission of optical signals and electric signals, and constitutes a photoelectric combined ferrule assembly. On the other hand, the elastic piece for elastically pressing the ferrule and the guide structure for plug-in guiding are designed as a part of the electric signal transmission line, so that it is unnecessary to additionally increase too many wiring structures, the internal structure is more simple, the functionality of each component is high, the cost is reduced, and the product is more suitable for miniaturization design.

Description

Technical Field

[0001] This invention relates to the field of MPO ferrule technology, and in particular to a photoelectric combined MPO ferrule assembly and its preparation method. Background Technology

[0002] The existing technology, with publication number CN112987191A and titled "An MPO Fiber Optic Connector," proposes an MPO fiber optic patch cord, including a locking sleeve, ferrule, fiber ribbon, optical cable, spring, spring base, and sheath. This type of MPO fiber optic patch cord offers advantages such as high density and low insertion loss. In actual production, the number of fiber ribbon cores can be changed according to usage requirements, such as 16 cores, 24 cores, 32 cores, etc. However, this type of MPO fiber optic patch cord can only transmit optical signals.

[0003] The technical solution proposed by Huawei, entitled "A Composite Module, Composite Cable Assembly and Control Method Thereof," with announcement number WO2022037114A1, presents a composite structure capable of transmitting both optical and electrical signals. It also proposes its application in MPO connectors. For example, without altering the physical structure of the MPO interface, the ribbon fiber can serve as a second optical connector, and the two metal guide pins can serve as second electrical connectors. This allows the MPO optical interface to be used as a first composite connector. This simplifies the fabrication process of the second optical and electrical connectors (by directly using the MPO interface), and enables the composite module provided in this application to meet the miniaturization needs of switches and access points. Furthermore, it is compatible with standard MPO connectors, improving the applicability of the composite module.

[0004] When laying cables over long distances, it is usually necessary to use fiber optic patch cords to connect the cables along the way, such as the MPO fiber optic patch cords proposed in document CN112987191A mentioned above.

[0005] When the patented solution applied by Huawei is applied to the MPO fiber optic patch cord, it only proposes an improved application of the insertion contact part (i.e., guide pin and guide hole), and lacks corresponding design for the internal structure of the MPO fiber optic patch cord ferrule.

[0006] If the power supply line between the MPO connector (specifically the second electrical connector) and the first electrical connector in Huawei's patent application is directly adopted, as proposed in Huawei's patent application, the power supply line can be designed as a circuit board, and the power supply line can be a cable covered with copper wire, a flexible circuit board, or at least one of the rigid circuit boards.

[0007] This directly results in the need for an additional power supply line inside the ferrule of the MPO fiber optic patch cord, which originally only transmits optical signals. This will greatly occupy the installation space inside the ferrule or increase the size of the ferrule accordingly, which is not conducive to the miniaturization design of the ferrule and requires further improvement. Summary of the Invention

[0008] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a photoelectric combined MPO ferrule assembly, comprising... Mounting base, the mounting base has a guide groove formed in the mounting base along the insertion direction, the guide groove has an anti-dislodgement outlet on the outside of the mounting base in the same first direction as the insertion direction of the insertion direction; The ferrule is slidably disposed on the guide groove along the insertion / removal direction. The ferrule has a front end that extends out from the anti-disconnection outlet along the first direction. The ferrule has multiple fiber core holes that penetrate the front end and the rear end of the ferrule along the insertion / removal direction. A conductive guide structure; when the ferrule is used as a male ferrule, the conductive guide structure includes a conductive guide pin extending from the front end face and the rear end face of the male ferrule; when the ferrule is used as a female ferrule, the conductive guide structure includes a guide hole formed on the female ferrule for accommodating the conductive guide pin, and a conductive contact spring is also provided on the guide hole, wherein when the conductive guide pin is inserted into the guide hole, the conductive contact spring makes conductive contact with the conductive guide pin; A conductive elastic element is disposed in a guide groove to apply elastic force to the insert, causing the insert to slide in a first direction; the conductive elastic element has a front end that mates with the insert and a rear end that mates with the rear end of the guide groove; the conductive elastic element has an elastic deformation direction corresponding to the insertion / removal direction in the guide groove, and the front end of the conductive elastic element makes conductive contact with the conductive guide structure. The optical fiber cable is installed at the rear end of the mounting base; Multi-fiber optical fibers are set in the guide groove. One end of the multi-fiber optical fiber is set on multiple fiber core holes, and the other end of the multi-fiber optical fiber is connected to the optical cable. The cable is located at the rear end of the mounting base, and the cable core is conductively connected to the rear end of the conductive elastic element.

[0010] As a further aspect of the present invention: the conductive elastic element includes a conductive helical compression spring, wherein the height direction of the conductive helical compression spring is the same as the insertion / removal direction.

[0011] As a further aspect of the present invention: the inner rear wall of the guide groove extends in a second direction that is the same as the pull-out direction of the insertion direction and is formed with a receiving groove. The rear end of the conductive helical compression spring is housed in the receiving groove, and the front end of the conductive helical compression spring extends through the guide groove in the first direction.

[0012] As a further embodiment of the present invention: a conductive helical compression spring is sleeved on the outside of a multi-fiber optical fiber.

[0013] As a further aspect of the present invention: a spring guide is installed in the guide groove, and the spring guide is located between the conductive helical compression spring and the multi-fiber optical fiber.

[0014] As a further embodiment of the present invention: the spring guide is cylindrical in shape, a conductive spiral compression spring is sleeved on the outside of the spring guide, and the spring guide is sleeved on the outside of the multi-fiber optical fiber.

[0015] As a further aspect of the present invention: the spring guide is a magnetic conductor; The spring guide guides the conductive helical compression spring, and when the insert slides along the first direction, the conductive helical compression spring has a portion located outside the spring guide. When the insert slides along the second direction, causing the conductive helical compression spring to be compressed or further compressed, the number of helical turns of the conductive helical compression spring sleeved on the spring guide increases accordingly.

[0016] As a further aspect of the present invention: a control unit connected to the cable is provided, and the control unit detects vibration and / or insertion during use based on changes in inductance.

[0017] As a further aspect of the present invention: an intermediate connector is provided between the wire core and the conductive helical compression spring, the intermediate connector including a first metal washer; The rear end of the conductive helical compression spring presses against the front end face of the intermediate connector, while the wire core is welded to the rear end face of the intermediate connector.

[0018] This invention provides the following technical solution: a method for preparing an optoelectronic combined MPO ferrule assembly, comprising the following steps: Step S1: Determine the product dimensions of the first metal washer, ferrule, mounting base, conductive guide structure, and second metal washer; Step S2: Based on the product dimensions determined in step S1, determine... When the anti-disengagement part of the ferrule abuts against the edge of the anti-disengagement outlet, the distance L1 from the front end face of the first metal washer to the rear end face of the second metal washer; Step S3: Based on distance L1, select a conductive helical compression spring whose length in the uncompressed deformation state is greater than or equal to L1; and based on distance L1, select a magnetic conductor whose length is less than L1. The length direction of the spring and the length direction of the magnetic conductor are the same as the insertion / removal direction. Step S4: Assemble the components to obtain the MPO ferrule assembly.

[0019] Compared with existing technologies, the beneficial effects of this technical solution are as follows: while satisfying the requirement of transmitting optical signals, an electrical signal transmission line is formed through cables, conductive elastic elements, and conductive guide structures. On the one hand, this enables the MPO ferrule assembly to simultaneously transmit optical and electrical signals, forming an optoelectronic ferrule assembly. On the other hand, by designing the elastic element used to elastically press the ferrule and the guide structure used for insertion guidance as part of the electrical signal transmission line, excessive additional wiring structures are eliminated, resulting in a simpler internal structure, higher functionality of each component, reduced costs, and greater scalability for product miniaturization.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention, wherein the ferrule is a male ferrule; Figure 2 yes Figure 1 Cross-sectional view of the structure along the AA direction, without showing the core and multifiber optical fiber; Figure 3 yes Figure 2 Enlarged schematic diagram of the local structure at point B; Figure 4 yes Figure 2 A magnified view of the local structure at point B in the middle. Figure 3 The diagram illustrates the core and multi-fiber optical fiber.

[0023] The corresponding labels in the attached diagram are explained as follows: Mounting bracket-1, Fence-2, Fence front end-21, Fence rear end-22, Anti-detachment part-23, Fiber optic core hole-24. Guide chute-3, anti-detachment outlet-31, receiving groove-32, first metal washer-33, positioning post-34. Conductive guidance structure-4, guide pin-41. Conductive elastic element-5 Core-6 Multifiber-7 Composite cable-8 Spring guide component - 9. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-4 A photoelectric combined MPO ferrule assembly includes a mounting base 1 and a ferrule 2. The mounting base 1 has a guide groove 3 formed in the insertion direction. The guide groove 3 has an anti-dislodgement outlet 31 opened on the outside of the mounting base 1 in a first direction that is the same as the insertion direction of the insertion direction.

[0026] Insertion and removal direction as follows Figure 1 The left and right directions shown are as follows: the first direction is to the right, that is, the insertion direction is to the right.

[0027] The ferrule 2 is slidably disposed on the guide groove 3 along the insertion / removal direction. The ferrule 2 has a front end 21 that extends out of the anti-disconnection outlet 31 along the first direction. The ferrule 2 has an anti-disconnection part 23 that abuts against the edge of the anti-disconnection outlet 31 to restrict the ferrule 2 from disconnecting out of the anti-disconnection outlet 31. The ferrule 2 has a plurality of fiber core holes 24 that penetrate the front end 21 and the rear end 22 of the ferrule along the insertion / removal direction.

[0028] The ferrule 2 is provided with a guide structure, which is used to guide the male ferrule and the female ferrule to engage.

[0029] In this embodiment, when the ferrule is a male ferrule, the guide structure includes a guide pin 41 that extends from the front end face of the male ferrule.

[0030] When the ferrule is used as a female ferrule, the guide structure includes a guide hole (not shown) formed on the female ferrule for accommodating a conductive guide pin, so that when the male ferrule and the female ferrule are mated, the guide pin is inserted into the guide hole, allowing the male ferrule and the female ferrule to mate in the insertion / removal direction.

[0031] In this embodiment, the guide structure is a conductive guide structure 4. When the guide structure of the male connector and the guide structure of the female connector are in mutual guiding contact, they form a conductive contact. That is, an electrical signal can be transmitted from the guide structure of the male connector to the guide structure of the female connector, or an electrical signal can be transmitted from the guide structure of the female connector to the guide structure of the male connector.

[0032] In some embodiments, the two ends of the guide pin 41 protrude from the front end face and the rear end face of the male connector, respectively. The guide pin 41 is a conductive guide pin made of metal.

[0033] In some embodiments, a conductive contact spring is also provided on the guide hole so that when the conductive guide needle is inserted into the guide hole, the conductive contact spring contacts the guide needle to achieve conductive contact.

[0034] In some embodiments, when the ferrule is a male ferrule, the mounting base is also provided with a connecting housing (not shown), the connecting housing having a first interface and a second interface at both ends in the insertion / removal direction, and the first interface and the second interface are connected inside the connecting housing.

[0035] The mounting base with a male connector is located inside the first interface, and the mounting base with a female connector can be inserted into the second interface to cooperate with the mounting base with the male connector, that is, the adapter connection between the male connector and the female connector.

[0036] In some embodiments, the connecting housing can lock the mounting base into the corresponding interface.

[0037] In this embodiment, an elastic element is provided in the guide groove 3. The elastic element is used to apply elastic force to the insert 2, so that the insert 2 slides in the first direction.

[0038] In this embodiment, the elastic element has an elastic deformation direction corresponding to the insertion / removal direction within the guide groove 3. When the insert 2 moves along a second direction that is the same as the removal direction of the insertion / removal direction, the elastic element undergoes elastic deformation along the insertion / removal direction.

[0039] Correspondingly, the elastic element has a front end that mates with the insert 2, and a rear end that mates with the inner rear wall of the guide groove 3 or with a component on the inner wall of the guide groove 3 for resisting the backward movement of the elastic element. When the insert 2 moves in a second direction that is the same as the pull-out direction as the insertion direction, both the front and rear ends of the elastic element exert force on the front and rear ends of the elastic element, causing the elastic element to undergo elastic deformation or further elastic deformation.

[0040] In this embodiment, the elastic element is a conductive elastic element 5. The front end of the conductive elastic element 5 makes conductive contact with the conductive guiding structure 4, that is, the electrical signal can be transmitted from the elastic element of the male connector (with a male plug) to the guiding structure of the male plug, and then to the guiding structure of the female plug; or the electrical signal can be transmitted from the elastic element of the female connector (with a female plug) to the guiding structure of the female plug, and then to the guiding structure of the male plug.

[0041] When the ferrule is a male ferrule, the conductive contact, for example, the front end of the corresponding conductive elastic element, contacts the conductive guide pin. When the ferrule is a female ferrule, the conductive contact, for example, the front end of the corresponding conductive elastic element, contacts the conductive contact spring.

[0042] In this embodiment, an optical cable is provided at the rear end of the mounting base 1. A multi-fiber optical fiber 7 is disposed within the guide groove 3, with one end of each fiber 7 corresponding to a different fiber core hole 24; that is, each fiber of the multi-fiber optical fiber is disposed in a different fiber core hole. The other end of the multi-fiber optical fiber 7 is connected to the optical cable. For example, the optical cable passes through the guide groove from the rear end of the mounting base and connects to the multi-fiber optical fiber.

[0043] In some embodiments, the multi-fiber optical fiber 7 can be configured as a ribbon optical fiber.

[0044] In this embodiment, a cable is provided at the rear end of the mounting base 1, and the core 6 of the cable is conductively connected to the rear end of the conductive elastic element 5. For example, the cable passes through the guide groove from the rear end of the mounting base, thereby making the core conductively connected to the rear end of the conductive elastic element.

[0045] While ensuring the transmission of optical signals, an electrical signal transmission line is formed by cables, conductive elastic elements 5, and conductive guide structures 4. On the one hand, this enables the MPO ferrule assembly to simultaneously transmit optical and electrical signals, forming an optoelectronic ferrule assembly. On the other hand, the elastic elements used to elastically press the ferrule and the guide structures used for insertion guidance are improved into part of the electrical signal transmission line, eliminating the need for excessive additional wiring structures. This results in a simpler internal structure, higher functionality of each component, reduced costs, and easier miniaturization of the product.

[0046] In some embodiments, electrical cables and optical fibers are combined on the same cable. For example, electrical cables and optical fibers are simultaneously covered within the same protective sheath to form a composite cable.

[0047] In some embodiments, the cable core is a metal core to improve the low tensile strength that would otherwise be achieved with only optical fiber.

[0048] In this embodiment, the conductive elastic element 5 includes a conductive helical compression spring, the height direction (or axial direction) of which is the same as the insertion / removal direction.

[0049] In some embodiments, the front end of the conductive spiral compression spring corresponds to the rear end 22 of the insert, and the rear end of the conductive spiral compression spring corresponds to the inner rear wall of the guide groove 3. When the insert 2 moves along the second direction, the conductive spiral compression spring is subjected to joint pressure compression or further pressure compression by the rear end 22 of the insert and the inner wall of the corresponding guide groove 3.

[0050] Correspondingly, the conductive helical compression spring can apply elastic force to the rear end 22 of the insert.

[0051] In some embodiments, a receiving groove 32 corresponding to the conductive helical compression spring is formed on the inner rear wall of the guide groove 3 along the second direction. The receiving groove 32 allows for a larger axial receiving length for the conductive helical compression spring. For example, the rear end of the conductive helical compression spring can be received in the receiving groove 32, and the front end of the conductive helical compression spring extends along the first direction into the guide groove 3 to cooperate with the rear end 22 of the insert.

[0052] In some embodiments, the width of the receiving groove 32 is smaller than the width of the guide groove 3, so that a stepped structure is formed between the receiving groove 32 and the guide groove 3. This stepped structure can limit the sliding stroke of the insert 2. If the insert 2 is slid along the second direction by an external force, the step structure can be used to resist the sliding of the insert 2 along the second direction, thereby limiting the insert 2 from continuing to slide along the second direction and forming the end point of sliding along the second direction.

[0053] After the external force is removed, the ferrule 2 slides along the first direction due to the elastic force. While sliding along the first direction, the anti-dislodgement part 23 can be engaged with the edge of the anti-dislodgement outlet 31 to prevent the ferrule 2 from continuing to slide along the first direction, thus forming the end point of sliding along the first direction.

[0054] In some embodiments, an intermediate connector is further provided between the wire core 6 and the conductive helical compression spring. The intermediate connector includes, for example, a first metal washer 33.

[0055] The rear end of the conductive helical compression spring presses against the front end face of the first metal washer 33, and the wire core 6 is welded to the rear end face of the first metal washer 33.

[0056] The receiving groove 32 has a limiting structure for restricting the first metal washer 33 from rotating in its circumference, thereby improving the conductive contact between the wire core 6 and the conductive helical compression spring.

[0057] In some embodiments, the limiting structure includes a positioning post 34 connected to the rear end face of the first metal washer 33, and the rear inner wall of the receiving groove 32 has a positioning hole corresponding to the positioning post 34.

[0058] The wire core 6 can be welded to the positioning post 34 on the rear end face of the first metal washer 33.

[0059] In some embodiments, an intermediate connector may also be provided between the conductive guide structure 4 and the conductive helical compression spring. The intermediate connector may include, for example, a second metal washer, which is placed between the front end of the conductive helical compression spring and the conductive guide pin or conductive contact spring to make contact and conduction connection.

[0060] For example, the front end of a conductive helical compression spring presses against the rear end face of a second metal washer, and the front end face of the second metal washer presses against a conductive guide pin or conductive contact spring.

[0061] In this embodiment, the conductive spiral compression spring is sleeved on the outside of the multi-fiber optical fiber 7, and the internal space of the conductive spiral compression spring is utilized by the multi-fiber optical fiber 7, which is more conducive to the miniaturization design of the product.

[0062] In this embodiment, a spring guide 9 is installed in the guide groove 3, and the spring guide 9 is located between the conductive spiral compression spring and the multi-fiber optical fiber 7.

[0063] For example, the spring guide 9 is cylindrical in shape, and the conductive spiral compression spring is sleeved on the outside of the spring guide 9. The spring guide 9 is sleeved on the outside of the multi-fiber optical fiber 7, forming a separation between the conductive spiral compression spring and the optical fiber. When the conductive spiral compression spring is compressed (or reset after compression), the spring guide 9 can guide the direction of movement of the conductive spiral compression spring and protect the multi-fiber optical fiber 7, so that the moving conductive spiral compression spring will not rub or scratch the multi-fiber optical fiber within the protection range of the spring guide 9.

[0064] In some embodiments, the spring guide 9 is a magnetic conductor. The conductive helical compression spring corresponds to an inductor coil.

[0065] The magnetic conductor is preferably made of a magnetic core or a metal with high magnetic permeability such as iron, nickel, or manganese.

[0066] In some embodiments, the spring guide 9 guides the conductive helical compression spring, and when the insert slides to the end point along the first direction, the conductive helical compression spring is configured to have a portion located outside the spring guide 9, for example, the front end of the conductive helical compression spring is located outside the spring guide 9, and the rear end of the conductive helical compression spring is sleeved on the spring guide 9; when the insert 2 slides along the second direction and the conductive helical compression spring is compressed or further compressed, the number of helical turns of the conductive helical compression spring sleeved on the spring guide 9 increases accordingly, that is, more coil turns are sleeved on the magnetic conductor.

[0067] In some embodiments, the outer side of the elastic guide 9 is insulated, for example, an insulating plastic shell or an insulating rubber shell is fitted onto the outer side of the elastic guide 9. When the elastic guide 9 guides a conductive helical compression spring, direct contact between the conductive helical compression spring and the spring guide can be prevented.

[0068] In some embodiments, the control system (including a control unit) using this ferrule assembly can detect vibration and / or insertion position during use based on changes in inductance. That is, by detecting the compression state of the conductive helical compression spring through changes in inductance, the position of the ferrule 2 on the guide groove 3 is evaluated, thereby determining whether the ferrule 2 is subjected to vibration during use, or whether the ferrule 2 has returned to its proper position after insertion.

[0069] Monitoring whether the ferrule is subjected to vibration during use can be applied to assess whether the environment is calm, thus helping technicians to identify real-time factors or causes of malfunctions in the usage scenario.

[0070] In this embodiment, in preparing the optoelectronic MPO ferrule assembly, the product dimensions of the first metal washer, ferrule, mounting base, conductive guide structure, and second metal washer are first determined. Then, based on the determined product dimensions, the distance L1 from the front end face of the first metal washer to the rear end face of the second metal washer is determined when the anti-dislodgement part of the ferrule and the edge of the anti-dislodgement outlet are in a stop-fitting engagement. Next, based on the distance L1, a conductive helical compression spring with a spring length greater than or equal to L1 in the uncompressed deformation state is selected. And a magnetic conductor with a length less than L1 is selected based on the distance L1, wherein the length direction of the spring and the length direction of the magnetic conductor are the same as the insertion / removal direction. Finally, the components are assembled to obtain the MPO ferrule assembly.

[0071] It will be apparent 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 invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A photoelectric combined MPO ferrule assembly, characterized in that, include: Mounting base, the mounting base has a guide groove formed in the mounting base along the insertion direction, the guide groove has an anti-dislodgement outlet on the outside of the mounting base in the same first direction as the insertion direction of the insertion direction; The ferrule is slidably disposed on the guide groove along the insertion / removal direction. The ferrule has a front end that extends out from the anti-disconnection outlet along the first direction. The ferrule has multiple fiber core holes that penetrate the front end and the rear end of the ferrule along the insertion / removal direction. A conductive guide structure; when the ferrule is used as a male ferrule, the conductive guide structure includes a conductive guide pin extending from the front end face and the rear end face of the male ferrule; when the ferrule is used as a female ferrule, the conductive guide structure includes a guide hole formed on the female ferrule for accommodating the conductive guide pin, and a conductive contact spring is also provided on the guide hole, wherein when the conductive guide pin is inserted into the guide hole, the conductive contact spring makes conductive contact with the conductive guide pin; A conductive elastic element is disposed in a guide groove to apply elastic force to the insert, causing the insert to slide in a first direction; the conductive elastic element has a front end that mates with the insert and a rear end that mates with the rear end of the guide groove; the conductive elastic element has an elastic deformation direction corresponding to the insertion / removal direction in the guide groove, and the front end of the conductive elastic element makes conductive contact with the conductive guide structure. The optical fiber cable is installed at the rear end of the mounting base; Multi-fiber optical fibers are set in the guide groove. One end of the multi-fiber optical fiber is set on multiple fiber core holes, and the other end of the multi-fiber optical fiber is connected to the optical cable. The cable is located at the rear end of the mounting base, and the cable core is conductively connected to the rear end of the conductive elastic element. The conductive elastic element includes a conductive helical compression spring, the height direction of which is the same as the insertion / extraction direction; The inner rear wall of the guide slide is formed with a receiving groove extending in a second direction, which is the same as the insertion direction. The rear end of the conductive helical compression spring is received in the receiving groove, and the front end of the conductive helical compression spring extends out into the guide slide along a first direction. A conductive helical compression spring is sleeved on the outside of a multi-fiber optical fiber; A spring guide is installed inside the guide groove, and the spring guide is located between the conductive spiral compression spring and the multi-fiber optical fiber. The spring guide is cylindrical in shape, and a conductive helical compression spring is sleeved on the outside of the spring guide. The spring guide is sleeved on the outside of the multi-fiber optical fiber. The spring guide is a magnetic conductor; the spring guide guides the conductive helical compression spring, and when the insert slides along the first direction, a portion of the conductive helical compression spring is located outside the spring guide; when the insert slides along the second direction and the conductive helical compression spring is compressed, the number of helical turns of the conductive helical compression spring sleeved on the spring guide increases accordingly. It is equipped with a control unit that connects to the cable, and the control unit detects vibration and / or insertion during use based on changes in inductance; An intermediate connector is provided between the wire core and the conductive helical compression spring. The intermediate connector includes a first metal washer. The rear end of the conductive helical compression spring presses against the front end surface of the intermediate connector, and the wire core is welded to the rear end surface of the intermediate connector. The receiving groove has a limiting structure for restricting the first metal washer from rotating in its circumferential direction; The limiting structure includes a positioning post connected to the rear end face of the first metal washer, and a positioning hole corresponding to the positioning post is provided on the rear inner wall of the receiving groove. The wire core is welded to the positioning post on the rear end face of the first metal washer; A second metal washer is provided between the conductive guide structure and the conductive helical compression spring. The front end of the conductive helical compression spring presses against the rear end face of the second metal washer, and the front end face of the second metal washer presses against the conductive guide pin or conductive contact spring. The outer side of the spring guide is fitted with an insulating plastic shell or an insulating rubber shell; when the spring guide guides the conductive helical compression spring, it can prevent the conductive helical compression spring from directly contacting the spring guide. The ferrule has an anti-dislodgement part that engages with the edge of the anti-dislodgement outlet to prevent the ferrule from dislodging from the outlet; The width of the receiving groove is smaller than the width of the guide groove, so that a stepped structure is formed between the receiving groove and the guide groove. This stepped structure can limit the sliding stroke of the insert. If the insert is slid along the second direction by an external force, the step structure can be used to resist the insertion from sliding along the second direction, thus limiting the insertion from sliding along the second direction and forming the end point of sliding along the second direction. After the external force is removed, the ferrule is slid along the first direction due to the elastic force. While sliding along the first direction, the ferrule can be restricted from continuing to slide along the first direction by the anti-dislodgement part and the edge of the anti-dislodgement outlet. This forms the end point of the sliding along the first direction.

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