Optical cable grading type connector

Abstract

The invention discloses an optical cable grading type connector, and relates to the technical field of optical cable connection, the optical cable grading type connector comprises a first joint and a second joint, the first joint comprises a sleeve, a non-cylindrical guide rod which is in sliding connection relative to the sleeve, a plurality of annular pieces which are coaxially sleeved and a first elastic piece, and the adjacent annular pieces are in sliding connection in the axial direction; the outermost annular piece is fixedly connected to the inner wall of the sleeve, the innermost annular piece is fixedly arranged on the guide rod in a sleeving mode, the end face, facing an outlet of the sleeve, of each annular piece is provided with a plurality of ceramic contact pins, and the annular pieces are driven to slide mutually and be staggered into a tower shape in the deformation recovery process of the first elastic piece; the second connector comprises an inner column, and a positioning hole and a plurality of inserting holes are formed in the inner column. According to the invention, the resistance when the first joint and the second joint are plugged can be greatly reduced, the plugging can be completed with a small plugging force channel, the plugging hand feeling is better, the phenomena of non-uniform stress, deflection and the like of each ceramic pin in the plugging process can be obviously reduced, and the plugging loss is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of optical cable connection, in particular to an optical cable graded connector. Background Art

[0002] An expanded beam fiber optic connector is usually composed of two plug-in connectors to achieve the connection between multiple fiber optic branches.

[0003] The patent with announcement number CN209102959U discloses a high-speed optical connector mechanism and structural assembly for aerospace, including a socket assembly and a plug assembly; wherein the plug assembly is a columnar structure with a docking groove at one axial end; the axial end of the socket assembly extends into the docking groove of the plug assembly to achieve docking; the socket assembly and the plug assembly are connected by J599 standard threaded docking; the socket assembly includes a PCB assembly, two TOSA optical emitting devices, two ROSA optical detecting devices, an optical device heat dissipation assembly fixing sleeve, a J599 standard socket housing, an optical device heat dissipation assembly rotating pressure plate, an optical device heat dissipation assembly guide sleeve and a standard fastener; the plug assembly includes a J599 standard plug housing, four pin assemblies and four floating self-aligning claws. It can achieve high-speed, high-precision and reliable connection of optical signals.

[0004] The patent application with publication number CN115685451A discloses an expanded beam optical cable connector alignment assembly and an expanded beam optical cable connector, including a base body, at least one collimator installed in a collimator mounting hole of the base body, the number of collimator mounting holes is the same as the number of collimators, the base body is provided with a locating pin located in a locating pin mounting hole and a locating pin hole for accommodating a locating pin on another expanded beam optical cable connector alignment assembly, the outer diameter of the locating pin matches the inner diameter of the locating pin mounting hole and the locating pin hole; the base body is provided with a plane perpendicular to its axial direction, the plane is lower than the front end face of the base body, forming the front end face of the base body, thereby forming an annular end face perpendicular to the axial direction of the base body, and the locating pin, the locating pin mounting hole, and the locating pin hole are axially parallel to the front end face of the base body. The realization of the expanded beam optical cable connector is to provide a low-pressure docking, maintain an excellent use feel, and at the same time reduce the influence of dust and other debris on the entire docking assembly and the optical cable connector.

[0005] In the prior art such as the above-mentioned patent, it is convenient and stable to connect connectors only with a small number of optical fiber branches. When the number of optical fiber branches is large, such as the connector of the J599 series, when two connectors are plugged in, the resistance generated by the ceramic pins connecting the batch of optical fiber branches being inserted into the corresponding jacks at the same time is very large, making the plugging difficult. In addition, since the ceramic pins and optical fiber branches are precision components, when excessive plugging pressure is applied between the two connectors, there is a situation where the local ceramic pins are damaged due to factors such as uneven force or skewed force, resulting in insertion loss. Summary of the invention

[0006] The object of the present invention is to provide a graded optical cable connector to solve the deficiencies in the above-mentioned prior art.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an optical cable hierarchical connector, comprising a first joint and a second joint, the first joint comprising a sleeve, a non-cylindrical guide rod slidably connected to the sleeve, a plurality of coaxially sleeved annular members and a first elastic member, each adjacent annular member being slidably connected along the axial direction, the outermost annular member being fixedly connected to the inner wall of the sleeve, the innermost annular member being fixedly sleeved on the guide rod, a plurality of ceramic pins being arranged on the end surface of each annular member facing the sleeve outlet, and the process of the first elastic member restoring the deformation drives each annular member to slide and displace relative to each other into a tower shape; the second joint comprises an inner column, the end surface of the inner column being provided with a positioning hole corresponding to the guide rod and a plurality of plug holes corresponding to each ceramic pin one by one; during the mutual plugging process between the sleeve of the first joint and the inner column of the second joint, the guide rod is inserted into the positioning hole, and each annular member approaches the inner column in turn so that each ceramic pin is inserted into the corresponding plug hole in batches.

[0008] Furthermore, the first elastic member includes a first compression spring movably mounted on the guide rod, one end of the first compression spring abuts against the innermost annular member, and the other end abuts against the partition plate on the sleeve.

[0009] Furthermore, a first locking mechanism is provided between two adjacent annular members, and when the ceramic pin on the inner annular member is inserted into the corresponding socket, the first locking mechanism is triggered to unlock.

[0010] Furthermore, the first locking mechanism includes a latch, a second elastic member, a wedge block and a sliding rod. The latch is slidably arranged on the inner ring member, and a locking hole is arranged on the inner wall of the outer ring member. The process of the second elastic member recovering its deformation drives the latch to slide and insert into the locking hole. The wedge block is fixedly connected to the latch, and the sliding rod is slidably connected to the inner ring member along the length direction of the guide rod. One end of the latch is slidably connected to the inclined surface of the wedge block, and the other end abuts and cooperates with the inner column during the process of the ceramic pin on the inner ring member being inserted into the corresponding socket, so that the latch overcomes the elastic force of the second elastic member and slides out of the locking hole.

[0011] Furthermore, the second elastic member includes a second compression spring, a first end of the second compression spring abuts against the latch, and the other end of the second compression spring abuts against the inner annular member.

[0012] Furthermore, a second locking mechanism is provided between the guide rod and the inner column, and the second locking mechanism is triggered to lock when all the ceramic pins on the annular member are inserted into the corresponding sockets.

[0013] Furthermore, the second locking mechanism includes a locking block, a third elastic member and an operating rod. The locking block is rotatably connected to the outer end of the guide rod via a central rotating shaft. The locking block has an unlocking position that completely coincides with the guide rod and a locking position that is misaligned with the guide rod in the rotation stroke relative to the guide rod. The process of the third elastic member restoring its deformation drives the locking block to rotate to the locking position. The operating rod is vertically fixedly connected to one end of the central rotating shaft away from the locking block. A cavity located at the bottom of the positioning hole is provided on the inner column. A guide groove is provided on the sleeve. The guide groove includes a connected straight groove and an annular groove. The operating rod passes through the guide groove to the outside of the sleeve.

[0014] Furthermore, the third elastic member includes a torsion spring movably mounted on the central rotating shaft, one end of the torsion spring is fixedly connected to the central rotating shaft, and the other end of the torsion spring is fixedly connected to the guide rod.

[0015] Furthermore, each of the ceramic pins is connected to an optical fiber branch.

[0016] In the above technical scheme, the present invention provides a graded optical cable connector. During the mutual plugging process of the sleeve of the first connector and the inner column of the second connector, the guide rod is first inserted into the positioning hole, and then the annular members approach the inner column in turn to allow the ceramic pins to be inserted into the corresponding sockets in batches, thereby greatly reducing the resistance during the plugging of the first connector and the second connector. The plugging can be completed with a smaller plugging force, and the plugging feel is better. At the same time, it can also significantly reduce the uneven force and deflection of the ceramic pins during the plugging process, thereby reducing insertion loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the structure when the first connector and the second connector are separated according to an embodiment of the present invention Figure Ⅰ ; Figure 2 Schematic diagram of the structure when the first connector and the second connector are separated according to an embodiment of the present invention Figure II ; Figure 3 A schematic diagram of the structure of the annular members provided in the embodiment of the present invention when the annular members are staggered in a tower shape; Figure 4 A schematic diagram of the structure of a ceramic pin on the innermost annular member provided by an embodiment of the present invention when inserted into a corresponding socket; Figure 5 The embodiment of the present invention provides Figure 4 Structural cross-section view along line AA; Figure 6 The embodiment of the present invention provides Figure 5 A magnified view of the structure at D in FIG. Figure 7 A schematic diagram of the structure of the ceramic pins on the two innermost annular members provided by an embodiment of the present invention when inserted into the corresponding sockets; Figure 8 The embodiment of the present invention provides Figure 7 Structural cross-section view along the BB line; Fig. 9 A schematic diagram of the structure of the first connector provided in an embodiment of the present invention Figure Ⅰ ; Fig.10 A schematic diagram of the structure of all the ceramic pins on the annular member provided by the embodiment of the present invention when they are inserted into the corresponding sockets; Fig.11 The embodiment of the present invention provides Fig.10 Structural cross-section view of the center CC line; Fig.12 A schematic diagram of the structure when the first connector and the second connector provided in an embodiment of the present invention are connected; Fig.13 A schematic diagram of the structure of the first connector provided in an embodiment of the present invention Figure II ; Fig.14 A schematic structural diagram of a second locking mechanism provided in an embodiment of the present invention.

[0019] Description of reference numerals: 1. First joint; 1.1. Sleeve; 1.2. Guide rod; 1.3. Ring member; 1.4. First elastic member; 1.5. Ceramic pin; 1.6. First locking mechanism; 1.61. Latch; 1.62. Second elastic member; 1.63. Wedge block; 1.64. Slide rod; 1.65. Lock hole; 1.7. Second locking mechanism; 1.71. Lock block; 1.72. Center shaft; 1.73. Third elastic member; 1.74. Operating rod; 1.75. Guide groove; 1.751. Straight groove; 1.752. Ring groove; 1.8. Partition plate; 2. Second joint; 2.1. Inner column; 2.2. Positioning hole; 2.3. Socket; 2.4. Cavity. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] See also Figure 1-14An optical cable hierarchical connector provided by an embodiment of the present invention comprises a first connector 1 and a second connector 2. The first plug and the second plug need to be plugged together. The first connector 1 comprises a sleeve 1.1, a non-cylindrical guide rod 1.2 slidably connected to the sleeve 1.1, a plurality of coaxially sleeved annular members 1.3 and a first elastic member 1.4. Adjacent annular members 1.3 are slidably connected along the axial direction. The outermost annular member 1.3 is fixedly connected to the inner wall of the sleeve 1.1. The innermost annular member 1.3 is fixedly sleeved on the guide rod 1.2. A plurality of ceramic pins 1.5 are arranged on the end surface of each annular member 1.3 facing the outlet of the sleeve 1.1. Each ceramic pin 1.5 is connected to an optical fiber branch (not shown in the figure). The process of restoring the deformation of the first elastic member 1.4 drives the annular members 1.3 to slide and displace relative to each other into a tower shape, such as Figure 1-3 The first elastic member 1.4 is preferably a first compression spring, which is movably sleeved on the guide rod 1.2, one end of the first compression spring abuts against the innermost annular member 1.3, and the other end abuts against the partition 1.8 on the sleeve 1.1, the partition 1.8 is fixedly connected in the sleeve 1.1, and a plurality of through holes for the optical fiber branches to pass through are provided on the partition 1.8; in this embodiment, the number of coaxially sleeved annular members 1.3 is three, the inner wall of the middle annular member 1.3 is slidably connected to the peripheral side of the innermost annular member 1.3, and the peripheral side of the middle annular member 1.3 is slidably connected to the inner wall of the outermost annular member 1.3. The second connector 2 includes an inner column 2.1, and the end surface of the inner column 2.1 is provided with a positioning hole 2.2 corresponding to the guide rod 1.2 and a plurality of jacks 2.3 corresponding to each ceramic pin 1.5. During the mutual plugging process of the sleeve 1.1 of the first joint 1 and the inner column 2.1 of the second joint 2, the guide rod 1.2 is first inserted into the positioning hole 2.2, and then each ring member 1.3 approaches the inner column 2.1 in turn to allow each ceramic pin 1.5 to be inserted into the corresponding plug hole 2.3 in batches.

[0022] The present invention provides an optical cable graded connector. During the mutual plugging process of the sleeve 1.1 of the first connector 1 and the inner column 2.1 of the second connector 2, the guide rod 1.2 is first inserted into the positioning hole 2.2, and then the annular members 1.3 approach the inner column 2.1 in turn to allow the ceramic pins 1.5 to be inserted into the corresponding plug holes 2.3 in batches, thereby greatly reducing the resistance during the plugging of the first connector 1 and the second connector 2. The plugging can be completed with a smaller plugging force, and the plugging feel is better. At the same time, the phenomenon of uneven force and deflection of the ceramic pins 1.5 during the plugging process can be significantly reduced, thereby reducing the insertion loss.

[0023] As a preferred technical solution of the present invention, a first locking mechanism 1.6 is provided between each adjacent two ring members 1.3. Among the three ring members 1.3 in this embodiment, a first locking mechanism 1.6 is provided between the middle ring member 1.3 and the innermost ring member 1.3, and another first locking mechanism 1.6 is provided between the middle ring member 1.3 and the outermost ring member 1.3. When the elastic force of the first elastic member 1.4 is released to make the ring members 1.3 slide and displace relative to each other into a tower shape, each first locking mechanism 1.6 is automatically locked. When the ceramic pin 1.5 on the innermost ring member 1.3 is inserted into the corresponding socket 2.3, the first locking mechanism 1.6 between the innermost ring member 1.3 and the middle ring member 1.3 is triggered to unlock. Figure 4-6 Then, each ceramic pin 1.5 on the middle ring member 1.3 can be inserted into the corresponding socket 2.3, and the first locking mechanism 1.6 between the middle ring member 1.3 and the outermost ring member 1.3 is triggered to unlock. Figure 7-9 , so that each ceramic pin 1.5 on the outermost ring member 1.3 can be inserted into the corresponding socket 2.3, the end faces of each ring member 1.3 are aligned, and all ceramic pins 1.5 are inserted into the corresponding socket 2.3 on the inner column 2.1, such as Figure 10-13Specifically, for the first locking mechanism 1.6 between any two adjacent ring members 1.3, the first locking mechanism 1.6 includes a latch pin 1.61, a second elastic member 1.62, a wedge block 1.63 and a slide bar 1.64. The latch pin 1.61 is slidably arranged on the inner ring member 1.3 in an embedded manner, and the sliding direction is a radial direction of the ring member 1.3. A lock hole 1.65 adapted to the latch pin 1.61 is arranged on the inner wall of the outer ring member 1.3. When the two ring members 1.3 are in a state of sliding dislocation, the second elastic member 1.62 restores its deformation to drive the latch pin 1.61 to slide into the lock hole 1.65. The second elastic member 1.62 is preferably a second compression spring, and a first end of the second compression spring abuts against the latch pin 1.61, and the other end abuts against the inner ring member 1.3. The wedge block 1.63 is fixedly connected to the latch pin 1.61, and the slide bar 1.64 is fixedly connected to the latch pin 1.61. The slide bar 1.64 is fixedly connected to the inner ring member 1.3. The rod 1.2 is slidably connected to the inner ring member 1.3 in the length direction, one end of the pin 1.61 is slidably connected to the inclined surface of the wedge block 1.63, and the other end protrudes from the end surface of the inner ring member 1.3 close to the inner column 2.1. When the ceramic pins 1.5 on the inner ring member 1.3 are inserted into the corresponding sockets 2.3 on the inner column 2.1, the sliding rod 1.64 abuts against the inner column 2.1, so that the sliding rod 1.64 slides relative to the inner ring member 1.3, and the sliding rod 1.64 and the wedge block 1.63 slide and cooperate, so that the pin 1.61 overcomes the elastic force of the second elastic member 1.62 and slides out of the lock hole 1.65, and the sleeve 1.1 of the first joint 1 is continuously applied with the plugging force, so that the outer ring member 1.3 slides relative to the inner ring member 1.3, so that each ceramic pin 1.5 on the outer ring member 1.3 is inserted into the corresponding sockets 2.3 on the inner column 2.1.

[0024] As a preferred technical solution of the present invention, a second locking mechanism 1.7 is provided between the guide rod 1.2 and the inner column 2.1. Before all the ceramic pins 1.5 on the annular member 1.3 are inserted into the corresponding sockets 2.3, the second locking structure is unlocked. After all the ceramic pins 1.5 on the annular member 1.3 are inserted into the corresponding sockets 2.3, the second locking mechanism 1.7 is triggered to lock, thereby locking the guide rod 1.2 and the inner column 2.1, that is, locking the first joint 1 and the second joint 2. Specifically, the second locking mechanism 1.7 includes a locking block 1.71, a third elastic member 1.73 and an operating rod 1.74. The locking block 1.71 is rotatably connected to the outer end of the guide rod 1.2 through a central rotating shaft 1.72. The central rotating shaft 1.72 is fixedly connected to the locking block 1.71 and is rotatably connected to the guide rod 1.2. The locking block 1.71 has an unlocking position that completely overlaps with the guide rod 1.2 and a locking position that is misaligned with the guide rod 1.2 in the rotation stroke relative to the guide rod 1.2. The process of the third elastic member 1.73 restoring its deformation drives the locking block 1.71 to rotate from the unlocking position to the locking position. The third elastic member 1.73 is preferably a torsion spring, which is movably sleeved on the central rotating shaft 1.72, and one end of the torsion spring is fixedly connected to the central rotating shaft 1.72 The other end is fixedly connected to the guide rod 1.2; the operating rod 1.74 is fixedly connected to the end of the central shaft 1.72 away from the locking block 1.71, the operating rod 1.74 is perpendicular to the central shaft 1.72, the inner column 2.1 is provided with a cavity 2.4 located at the bottom of the positioning hole 2.2, the sleeve 1.1 is provided with a guide groove 1.75, the guide groove 1.75 includes a connected straight groove 1.751 and an annular groove 1.752, the straight groove 1.751 is parallel to the axial direction of the sleeve 1.1, the annular groove 1.752 is distributed along the circumference of the sleeve 1.1, the annular groove 1.752 is located at the end of the straight groove 1.751 away from the locking block 1.71, the operating rod 1.74 passes through the guide groove 1.75 to the outside of the sleeve 1.1, and the end of the operating rod 1.74 located outside the sleeve 1.1 is the operating end.

[0025] Among the three annular members 1.3 in this embodiment, before the first connector 1 and the second connector 2 are plugged in, the three annular members 1.3 maintain a tower shape, the operating rod 1.74 is located at the end of the straight groove 1.751 close to the end away from the annular groove 1.752, the straight groove 1.751 restricts the rotation of the operating rod 1.74, the torsion spring is in a force storage state, the two first locking mechanisms 1.6 are in a locked state, and the second locking mechanism 1.7 is in an unlocked state. Figure 1-2During the plugging process between the first connector 1 and the second connector 2, when the locking block 1.71 and the guide rod 1.2 are inserted into the positioning hole 2.2 and the ceramic pin 1.5 on the innermost ring member 1.3 is inserted into the corresponding plug hole 2.3, the locking block 1.71 just passes through the positioning hole 2.2 and enters the cavity 2.4, that is, the side of the locking block 1.71 close to the guide rod 1.2 is located at the junction of the positioning hole 2.2 and the cavity 2.4, and the first locking mechanism 1.6 between the innermost ring member 1.3 and the middle ring member 1.3 is unlocked, as shown in FIG. Figure 4-5 Then, each ceramic pin 1.5 on the middle ring member 1.3 is inserted into the corresponding socket 2.3, and the first locking mechanism 1.6 between the middle ring member 1.3 and the outermost ring member 1.3 is unlocked, and the first compression spring is further compressed, and the operating rod 1.74 is located in the middle of the straight groove 1.751, and the straight groove 1.751 limits the rotation of the operating rod 1.74, such as Figure 7-8 When the ceramic pins 1.5 on the outermost annular member 1.3 can be inserted into the corresponding sockets 2.3, that is, all the ceramic pins 1.5 are inserted into the corresponding sockets 2.3 on the inner column 2.1, the first compression spring is further compressed again, and the operating rod 1.74 moves relatively to the junction of the straight groove 1.751 and the annular groove 1.752. At this time, the straight groove 1.751 can no longer limit the rotation of the operating rod 1.74, and the elastic force accumulated in the torsion spring is released, so that the operating rod 1.74, the central shaft 1.72 and the locking block 1.71 rotate together. The operating rod 1.74 moves along the annular groove 1.752 until it is blocked at one end of the annular groove 1.752 away from the straight groove 1.751, and the locking block 1.71 is rotated from the unlocking position to the locking position, that is, the locking block 1.71 is rotated and misaligned relative to the positioning hole 2.2, and the side of the locking block 1.71 close to the guide rod 1.2 is abutted and blocked by the junction of the positioning hole 2.2 and the cavity 2.4. Even if the first joint 1 and the second joint 2 are pulled out, the locking block 1.71 will not enter the positioning hole 2.2, so that automatic locking is achieved after the first joint 1 and the second joint 2 are plugged in. When unlocking, it is necessary to overcome the elastic force of the torsion spring, and rotate the operating rod 1.74 through the operating end to make the operating rod 1.74 move along the annular groove 1.752 to the intersection of the annular groove 1.752 and the straight groove 1.751. The operating rod 1.74 drives the locking block 1.71 to rotate and reset from the locking position to the unlocking position through the central rotating shaft 1.72. At this time, the first joint 1 and the second joint 2 can be pulled apart.

[0026] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An optical cable hierarchical connector, comprising a first connector and a second connector, characterized in that: The first joint comprises a sleeve, a non-cylindrical guide rod slidably connected to the sleeve, a plurality of coaxially sleeved annular members and a first elastic member, wherein adjacent annular members are slidably connected to each other along the axial direction, the outermost annular member is fixedly connected to the inner wall of the sleeve, the innermost annular member is fixedly sleeved on the guide rod, and a plurality of ceramic pins are arranged on the end surface of each annular member facing the sleeve outlet, and the process of the first elastic member restoring its deformation drives the annular members to slide and displace relative to each other into a tower shape; The second joint comprises an inner column, and a positioning hole corresponding to the guide rod and a plurality of sockets corresponding to the ceramic pins are arranged on the end surface of the inner column; During the mutual plugging process between the sleeve of the first joint and the inner column of the second joint, the guide rod is inserted into the positioning hole, and each annular member approaches the inner column in turn so that each ceramic pin is inserted into the corresponding plug hole in batches.

2. The optical cable graded connector according to claim 1, characterized in that: The first elastic member comprises a first compression spring movably sleeved on the guide rod, one end of the first compression spring abuts against the innermost annular member, and the other end abuts against the partition plate on the sleeve.

3. The optical cable graded connector according to claim 1, characterized in that: A first locking mechanism is provided between two adjacent annular members, and when the ceramic pin on the inner annular member is inserted into the corresponding insertion hole, the first locking mechanism is triggered to unlock.

4. The optical cable graded connector according to claim 3, characterized in that: The first locking mechanism includes a latch, a second elastic member, a wedge block and a sliding rod. The latch is slidably arranged on the inner ring member. A locking hole is arranged on the inner wall of the outer ring member. The second elastic member restores its deformation to drive the latch to slide into the locking hole. The wedge block is fixedly connected to the latch. The sliding rod is slidably connected to the inner ring member along the length direction of the guide rod. One end of the latch is slidably connected to the inclined surface of the wedge block, and the other end abuts and cooperates with the inner column during the process of inserting the ceramic pin on the inner ring member into the corresponding socket, so that the latch overcomes the elastic force of the second elastic member and slides out of the locking hole.

5. The optical cable graded connector according to claim 4, characterized in that: The second elastic member includes a second compression spring, a first end of the second compression spring abuts against the latch, and the other end of the second compression spring abuts against the inner annular member.

6. An optical cable graded connector according to claim 1 or 4, characterized in that: A second locking mechanism is provided between the guide rod and the inner column, and the second locking mechanism is triggered to lock when all the ceramic pins on the annular member are inserted into the corresponding sockets.

7. The optical cable graded connector according to claim 6, characterized in that: The second locking mechanism includes a locking block, a third elastic member and an operating rod. The locking block is rotatably connected to the outer end of the guide rod via a central rotating shaft. The locking block has an unlocking position that completely coincides with the guide rod and a locking position that is misaligned with the guide rod in the rotation stroke relative to the guide rod. The process of the third elastic member restoring its deformation drives the locking block to rotate to the locking position. The operating rod is vertically fixedly connected to one end of the central rotating shaft away from the locking block. A cavity located at the bottom of the positioning hole is provided on the inner column. A guide groove is provided on the sleeve. The guide groove includes a connected straight groove and an annular groove. The operating rod passes through the guide groove to the outside of the sleeve.

8. The optical cable graded connector according to claim 7, characterized in that: The third elastic member comprises a torsion spring movably sleeved on the central rotating shaft, one end of the torsion spring is fixedly connected to the central rotating shaft, and the other end is fixedly connected to the guide rod.

9. The optical cable graded connector according to claim 1, characterized in that: Each of the ceramic pins is connected to an optical fiber branch.

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