An insert core component and an optical fiber quick connector having the same

Abstract

The present invention relates to the technical field of connectors, and discloses a ferrule assembly and an optical fiber quick connector having the same, wherein the ferrule assembly comprises a tail seat, a ferrule, a pressing block and a lock, wherein a window portion is provided on the tail seat, and a support platform is provided in the window portion; an opening is provided at one end of the tail seat; a housing cavity for accommodating an optical fiber is provided in the ferrule; one end of the ferrule passes through the opening and contacts with the support platform to form a step portion, and a groove portion is provided therein; the other end of the ferrule is located outside the tail seat; the pressing block comprises a clamping portion, a flexible portion and a tail handle portion, wherein the clamping portion contacts with the groove portion, and the tail handle portion contacts with the step portion; the flexible portion respectively connects the clamping portion and the tail handle portion; and the lock is slidably sleeved on the tail seat. The present invention has high assembly efficiency, compact structure and high stability.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and particularly to a ferrule assembly and an optical fiber quick connector having the same. Background Art

[0002] Existing optical fiber connectors mainly include through-type and pre-embedded types. Among them, the pre-embedded connector pre-embeds an optical fiber in the inner hole of the ferrule. One end passes through the ferrule and forms a terminal for docking with a normal connector after grinding and polishing, and the other end is exposed by a certain length and is used to connect the incoming optical fiber.

[0003] The pre-embedded connector generally includes a ferrule assembly, a connector body, and components such as a front sleeve, a rear sleeve, and an optical cable clamping portion. Among them, the ferrule assembly is the core component of the pre-embedded connector.

[0004] Generally speaking, the components of the ferrule assembly include: a ferrule with an inner hole, a pressing block, a tail seat, a pre-embedded optical fiber, and a lock. One end of the ferrule is a plugging end, and the other end forms a groove portion exposed from the inner hole; the pre-embedded optical fiber is disposed in the inner hole of the ferrule, and one end of the pre-embedded optical fiber is located at the plugging end of the ferrule, and the other end is located at the groove portion of the ferrule. The tail seat has a window portion, and a stepped portion is provided in the window portion. The ferrule is sleeved in the tail seat, so that the plugging end protrudes from the front end opening of the tail seat, and the groove portion is exposed from the window portion. The pressing block includes a pressing portion and a tail handle portion; the pressing block is disposed in the window portion, so that the pressing portion cooperates with the groove portion, and the tail handle portion cooperates with the stepped portion. The lock is movably sleeved outside the tail seat.

[0005] When the ferrule assembly is in the unlocked state, the lock is located at the position corresponding to the tail handle portion, and there is a certain surplus space between the pressing portion and the bottom surface of the groove portion. At this time, the incoming optical fiber is inserted into the inner hole exposed by the groove portion and docked with the pre-embedded optical fiber; then the lock is moved to the position corresponding to the pressing portion, so that the ferrule assembly is in the locked state, and the pressing portion presses the optical fiber docking point.

[0006] In actual work, as the lock moves in the locking direction, the tail handle portion of the pressing block needs to undergo a certain deformation, so that the pressing portion closely cooperates with the bottom surface of the groove portion. However, due to the high strength of the pressing block itself, a relatively large thrust needs to be applied to the lock to move the lock to the position corresponding to the pressing portion, which is laborious to operate and has low assembly efficiency; in addition, the high strength of the pressing block will also cause the pressing block to not cooperate closely with the bottom surface of the groove portion due to the large deformation recovery force of the pressing block in the locked state, and the problem that the optical fiber docking point is often not pressed tightly often occurs. At the same time, after multiple unlocking and locking operations, the pressing block is prone to irreversible deformation, resulting in a decrease in the stability of the optical fiber connector. Summary of the Invention

[0007] The object of the present invention is to provide a ferrule assembly and an optical fiber quick connector having the same, which have high assembly efficiency, a compact structure and high stability.

[0008] To solve the above technical problems, the present invention provides a ferrule assembly, including a tail seat, a ferrule, a pressing block and a latch. A window portion is provided on the tail seat, and a support platform is arranged in the window portion; an opening is provided at one end of the tail seat; a receiving cavity for receiving an optical fiber is provided in the ferrule; one end of the ferrule passes through the opening and is combined with the support platform to form a stepped portion, and a groove portion corresponding to the window portion is provided thereon, and the receiving cavity is exposed on the groove portion; the other end of the ferrule is located outside the tail seat; the pressing block includes a pressing portion, a flexible portion and a tail handle portion, the pressing portion is in contact connection with the groove portion, and the tail handle portion is in contact connection with the stepped portion; the flexible portion connects the pressing portion and the tail handle portion respectively; the latch is slidably sleeved on the tail seat.

[0009] Preferably, the bottom surface of the pressing portion is a flat structure, and its width is smaller than the maximum width of the pressing portion.

[0010] Preferably, the ratio of the width K1 of the bottom surface of the pressing portion to the maximum width K2 of the pressing portion is (0.1-0.5):1.

[0011] Preferably, the maximum thickness H3 of the pressing portion is greater than the thickness H1 of the flexible portion and the thickness H2 of the tail handle portion respectively, and the thickness H2 of the tail handle portion is greater than the thickness H1 of the flexible portion.

[0012] Preferably, the vertical distance S1 between the bottom surface of the tail handle portion and the bottom surface of the pressing portion is smaller than the maximum vertical distance S2 between the top surface of the stepped portion and the bottom surface of the groove portion.

[0013] Preferably, the S1 and S2 satisfy:

[0014] 0.02mm ≤ S2 - S1;

[0015] The H1 and H3 satisfy:

[0016] ;

[0017] 0.2mm ≤ H1 ≤ 0.7mm.

[0018] Preferably, the ferrule includes a first ferrule, a second ferrule and a connecting member, the plugging end is arranged at the first ferrule, the groove portion is provided at the second ferrule, and the first ferrule and the second ferrule are connected by the connecting member.

[0019] Preferably, a limiting hook and a slot are provided at one end of the tail seat far away from the opening, and the slot extends along the long axis direction of the tail seat.

[0020] Preferably, one end of the tailstock is cylindrical, and the ratio of the width of the slotted groove to the diameter of one end of the tailstock is not greater than 0.5:1.

[0021] To solve the above problems, the present invention also provides an optical fiber quick connector, which includes a main body and the ferrule assembly described in any one of the above, and the ferrule assembly is installed in the main body.

[0022] The present invention has the following beneficial effects:

[0023] The cooperative structure design of the pressing block, the groove portion and the window portion of the tailstock of the present invention enables the lock catch to move to the position corresponding to the pressing portion without excessive force during the locking process, and the assembly efficiency is high; in the locked state, since the deformation of the pressing block mainly occurs in the flexible portion, the flexible portion has good flexibility and its deformation recovery force is small, and it is sufficient to ensure the tight fit between the pressing portion of the pressing block and the bottom surface of the groove portion under the action of the lock catch, and the optical fiber docking point is tightly pressed; the good flexibility of the flexible portion gives it better fatigue resistance, and it can also maintain the original performance of the pressing block after multiple unlocking and locking operations, avoiding the reduction of the stability of the optical fiber connector; at the same time, the bottom width of the pressing portion of the pressing block is small, which can effectively avoid the phenomenon that the optical fiber docking point cannot be tightly pressed due to the inclination of the optical fiber docking platform, ensuring the yield and quality of the product. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the ferrule assembly provided by an embodiment of the present invention;

[0025] Figure 2 is an exploded structural diagram of the ferrule assembly provided by an embodiment of the present invention;

[0026] Figure 3 is a sectional view of the ferrule assembly provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of the pressing block provided by an embodiment of the present invention;

[0028] Figure 5 is a side view of the pressing block provided by an embodiment of the present invention;

[0029] Figure 6 is an effect diagram of the action of a traditional pressing block when the docking platform is inclined;

[0030] Figure 7 is an effect diagram of the action of the pressing block provided by an embodiment of the present invention

[0031] Figure 8 is an effect diagram of the action of the pressing block provided by an embodiment of the present invention when the docking platform is inclined;

[0032] Figure 9 It is a schematic structural diagram of the tailstock provided by an embodiment of the present invention;

[0033] Figure 10 It is an unlocking state diagram of the ferrule assembly provided by an embodiment of the present invention;

[0034] Figure 11 is Figure 10 An enlarged view of portion A of

[0035] Figure 12 It is a locking state diagram of the ferrule assembly provided by an embodiment of the present invention;

[0036] Figure 13 is Figure 12 An enlarged view of portion B of

[0037] Figure 14 It is a schematic structural diagram of an optical fiber quick connector provided by an embodiment of the present invention;

[0038] Figure 15 is Figure 14 An exploded view of the optical fiber quick connector of

[0039] Figure 16 is Figure 14 A schematic structural diagram of the main body of the optical fiber quick connector of

[0040] Figure 17 is Figure 14 A schematic structural diagram of the front sleeve of the optical fiber quick connector of

[0041] Figure 18 It is another schematic structural diagram of an optical fiber quick connector provided by an embodiment of the present invention;

[0042] Figure 19 It is another schematic structural diagram of an optical fiber quick connector provided by an embodiment of the present invention;

[0043] Figure 20 It is a process diagram of the tailstock assembly of the optical fiber quick connector provided by an embodiment of the present invention.

[0044] Reference numerals: 1, tailstock; 101, window portion; 102, support platform; 103, opening; 104, limit hook; 105, slotted groove; 2, ferrule; 201, receiving cavity; 202, groove portion; 203, first ferrule; 204, connecting member; 205, second ferrule; 3, pressing block; 301, pressing portion; 302, flexible portion; 303, tail handle portion; 304, inclined transition surface; 4, lock; 5, step portion; 6, main body; 601, main body window portion; 602, first abutting protrusion; 603, second abutting protrusion; 604, limit protrusion; 7, ferrule assembly; 8, rear sleeve; 9, optical cable clamping portion; 10, front sleeve; 1001, abutting window; 1002, front abutting edge; 1003, rear abutting edge; 11, cover plate. Detailed implementation manners

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0046] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0047] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0048] See Figures 1 to 3, a preferred embodiment of the present invention provides a ferrule 2 assembly, including a tail seat 1, a ferrule 2, a pressing block 3 and a lock 4. A window portion 101 is provided on the tail seat 1, and a support platform 102 is arranged in the window portion 101; an opening 103 is provided at one end of the tail seat 1; a receiving cavity 201 for receiving an optical fiber is provided in the ferrule 2; one end of the ferrule 2 passes through the opening 103 and is combined with the support platform 102 to form a stepped portion 5, and a groove portion 202 corresponding to the window portion 101 is provided thereon, and the receiving cavity 201 is exposed on the groove portion 202; the other end of the ferrule 2 is located outside the tail seat 1; the pressing block 3 includes a pressing portion 301, a flexible portion 302 and a tail handle portion 303, the pressing portion 301 is in contact connection with the groove portion 202, and the tail handle portion 303 is in contact connection with the stepped portion 5; the flexible portion 302 connects the pressing portion 301 and the tail handle portion 303 respectively; the lock 4 is slidably sleeved on the tail seat 1.

[0049] It should be noted that an optical fiber is pre-embedded in the receiving cavity 201; the end of the ferrule located outside the tail seat is a plug-in end, and the plug-in end is used to connect with other adapters or connectors.

[0050] Based on the above solution, the working principle of the ferrule 2 assembly of the preferred embodiment of the present invention: Insert the optical cable with the incoming optical fiber from the tail end of the tail seat 1, so that the incoming optical fiber is inserted into the receiving cavity 201 on the groove portion 202 and is butt-jointed with the optical fiber pre-embedded in the receiving cavity 201. The pressing portion 301 of the pressing block 3 is matched with the groove portion 202 and the tail handle portion 303 is matched with the stepped portion 5; then the lock 4 is sleeved on the outside of the tail seat 1 and moved from the unlocked position to the locked position, so that the pressing portion 301 is tightly matched with the groove portion 202 to press the optical fiber butt-joint point and complete the assembly.

[0051] See Figures 4 to 8 , as a preferred solution, the bottom surface of the pressing portion 301 is a plane structure, and its width is smaller than the maximum width of the pressing portion 301. Specifically, the width of the lower surface of the pressing portion 301 is small, which is more conducive to controlling its flatness, thereby effectively reducing the influence of the flatness deviation of the lower surface of the pressing portion 301 on the pressing degree of the optical fiber butt-joint point, and reducing the manufacturing process difficulty and cost of the pressing block 3; the width of the lower surface of the pressing portion 301 is small. When the opening direction of the groove portion 202 is slightly non-parallel to the opening direction of the window portion 101, due to the limitation of the width of the lower surface of the pressing portion 301, the gap between the lower surface of the pressing portion 301 and the bottom surface of the groove portion 202 will not be made too large, so as to effectively reduce the situation that the optical fiber butt-joint point cannot be tightly pressed during the assembly of the ferrule 2 assembly, and greatly improve the assembly efficiency on the premise of ensuring the performance of the optical fiber connector.

[0052] As a preferred solution, the ratio of the width K1 of the bottom surface of the pressing part 301 to the maximum width K2 of the pressing part 301 is (0.1 - 0.5):1. Specifically, if K1 is too large, on the one hand, during the assembly process of the pressing block 3, it is easy for the optical fiber docking point not to be tightly pressed because the opening direction of the groove part 202 is not strictly parallel to the opening direction of the window part 101, affecting the product performance; on the other hand, the influence of the flatness deviation of the lower surface of the pressing part 301 on the pressing degree of the optical fiber docking point increases. When the pressing degree requirement is the same, when K1 is large, the requirement for the flatness consistency of the lower surface of the pressing part 301 is extremely high, increasing the process difficulty and cost. If K1 is too small, it is not conducive to completely covering the accommodation cavity exposed by the groove part 202.

[0053] As a preferred solution, the maximum thickness H3 of the pressing part 301 is respectively greater than the thickness H1 of the flexible part 302 and the thickness H2 of the tail handle part 303, and the thickness H2 of the tail handle part 303 is greater than the thickness H1 of the flexible part 302. Specifically, the pressing block 3 has a flexible part 302. During the locking and unlocking processes, the deformation of the pressing block 3 mainly occurs in the flexible part 302. Since the flexible part 302 has a thin thickness and high flexibility, it is easy to deform, making the assembly labor-saving.

[0054] As a preferred solution, the vertical distance S1 between the bottom surface of the tail handle part 303 and the bottom surface of the pressing part 301 is less than the maximum vertical distance S2 between the top surface of the step part 5 and the bottom surface of the groove part 202. Specifically, the cooperative structure design of S1 < S2 can ensure that the incoming optical fiber can be smoothly inserted into the inner hole of the groove part 202 in the unlocked state, and the pressing part 301 can press the optical fiber docking point in the locked state.

[0055] As a preferred solution, S1 and S2 satisfy:

[0056] 0.02mm ≤ S2 - S1;

[0057] Furthermore, S2 - S1 ≤ 0.3mm;

[0058] H1 and H3 satisfy:

[0059] ;

[0060] 0.2mm ≤ H1 ≤ 0.7mm.

[0061] Specifically, through the above-mentioned size design of the pressing block 3, the flexible part 302 has good toughness, high strength, reduces the difficulty of locking (the difficulty of deformation of the flexible part 302 during locking), and has excellent anti-fatigue performance. It can be locked and unlocked repeatedly for multiple times without the mechanical properties of the pressing block 3 being reduced. The difference between S2 and S1 within this range can, on the one hand, ensure that the external optical fiber can be smoothly inserted into the inner hole of the groove part 202 when the flexible part 302 is in a non-deformed state, and on the other hand, ensure that the pressing part 301 can press the butt joint point of the embedded optical fiber and the external optical fiber when the flexible part 302 is in a deformed state, guaranteeing the coaxial alignment of the two optical fibers.

[0062] As a preferred solution, the ferrule 2 includes a first ferrule 203, a second ferrule 205, and a connector 204. The plugging end is located at the first ferrule 203, the groove part 202 is opened at the second ferrule 205, and the first ferrule 203 and the second ferrule 205 are connected by the connector 204.

[0063] See Figure 9 and Figure 20 As a preferred solution, one end of the tail seat 1 is provided with a limit hook 104 and a slot 105, and the slot 105 extends along the long axis direction of the tail seat 1. Specifically, during the assembly process of the optical fiber connector, the deformation that occurs when the limit hook 104 passes through the gap is mainly borne by the tail end of the tail seat 1, avoiding excessive deformation of the limit protrusion of the connector body and permanent deformation or damage, and ensuring the stability of the optical fiber connector. At the same time, due to the increased deformation ability of the tail end of the tail seat 1, it is more labor-saving and has a high assembly efficiency during manual assembly.

[0064] As a preferred solution, one end of the tail seat 1 is cylindrical, and the ratio of the width of the slot 105 to the diameter of one end of the tail seat 1 is not greater than 0.5:1. Specifically, if the width of the slot 105 is too large, the strength of the barb is too low, and the tail seat 1 is easily disengaged from the inner hole of the connector body.

[0065] As a preferred solution, there are two slots 105, which are symmetrically arranged at the tail end of the tail seat 1.

[0066] As a preferred solution, the lock 4 can move in the position area corresponding to the pressing block 3, and there is an interference fit when the lock 4 is located at the position corresponding to the pressing part 301.

[0067] As a preferred solution, the upper surface of the pressing part 301 is a convex structure compared to the upper surface of the flexible part 302, and there is an inclined transition surface between the upper surface of the pressing part 301 and the upper surface of the flexible part 302.

[0068] See Figures 10 to 12, as a preferred solution, when the ferrule assembly is in the unlocked state, the lock catch 4 is located at the position corresponding to the tail handle portion 303, and there is a surplus space between the lower surface of the pressing portion 301 and the bottom surface of the groove portion 202; when the ferrule 2 assembly is in the locked state, the lock catch 4 is located at the position corresponding to the pressing portion 301, and the lower surface of the pressing portion 301 is in close fit with the bottom surface of the groove portion 202.

[0069] As a preferred solution, when the ferrule 2 assembly is in the unlocked state, the flexible portion 302 is in a natural undeformed state under no force; when the ferrule 2 assembly is in the locked state, the flexible portion 302 is in a deformed state under force.

[0070] As a preferred solution, the height H4 of the surplus space ≤ the height difference S3 between the upper surface of the pressing portion 301 and the upper surface of the flexible portion 302. This design can ensure that when the lock catch 4 moves to the area of the pressing portion 301, the lower surface of the pressing portion 301 is in close fit with the bottom surface of the groove portion 202.

[0071] See Figures 13 to 19 , the preferred embodiment of the present invention further provides an optical fiber quick connector, including a main body 6 and the ferrule assembly 7 of any one of the above, and the ferrule assembly 7 is installed in the main body 6.

[0072] It should be noted that the main body 6 of the optical fiber quick connector has a main body window portion 601. The ferrule assembly 7 is sleeved in the inner cavity of the main body 6, so that one end of the ferrule protrudes from the front end opening 103 of the main body 6, and the lock catch 4 is exposed in the main body window portion 601 within the movable range.

[0073] As a preferred solution, the optical fiber quick connector further includes a rear sleeve 8 and an optical cable clamping portion 9. The optical cable clamping portion 9 is provided at the tail end of the main body 6, and the rear sleeve 8 is sleeved outside the tail end of the main body 6.

[0074] As a preferred solution, the optical cable clamping portion 9 is detachably separable from the main body 6 or integrated with the main body 6.

[0075] As a preferred solution, the connection method between the rear sleeve 8 and the main body 6 can be: rotatable connection type, screw connection type, or snap connection type.

[0076] As a preferred solution, the optical fiber connector further includes a front sleeve 10. The front sleeve 10 is sleeved on the outer side of the front end of the main body 6. On the outer surface of at least one side wall at the front end of the main body 6, a first abutting protrusion 602 and a second abutting protrusion 603 are formed, and the two abutting protrusions are arranged at intervals along the axial direction of the main body 6; at least one side wall of the front sleeve 10 is provided with an abutting window 1001. After the front sleeve 10 is sleeved on the outer side of the front end of the main body 6, the two abutting protrusions are located in the abutting window 1001, and the first abutting protrusion 602 can abut against the front abutting edge 1002 of the abutting window 1001 to limit the rearward movement of the front sleeve 10, and the second abutting protrusion 603 can abut against the rear abutting edge 1003 of the abutting window 1001 to limit the forward movement of the front sleeve 10. Wherein, the height of the first abutting protrusion 602 is lower than that of the second abutting protrusion 603, and the front abutting edge 1002 is closer to the inner cavity of the front sleeve 10 than the rear abutting edge 1003. And the front sleeve 10 is provided with a push clip coordination opening 103, and the lock catch 4 is exposed from the push clip coordination opening 103.

[0077] As a preferred solution, the side wall in the inner cavity of the main body 6 has a limiting protrusion 604, and the limiting protrusion 604 and the limiting hook 104 form a clamping fit to limit the movement of the ferrule assembly 7 in the direction of the front end of the main body 6.

[0078] In summary, the preferred embodiment of the present invention provides a ferrule assembly and an optical fiber quick connector having the same. Compared with the prior art:

[0079] The cooperation structure design of the pressing block 3, the groove part 202 and the window part 101 of the tail seat 1 of the present invention enables the lock catch 4 to move to the position corresponding to the pressing part 301 without excessive force during the locking process, and the assembly efficiency is high; in the locked state, since the deformation of the pressing block 3 mainly occurs in the flexible part 302, and the flexible part 302 has good flexibility and its deformation recovery force is small, under the action of the lock catch 4, it is sufficient to ensure that the pressing part 301 of the pressing block 3 is in close fit with the bottom surface of the groove part 202, and the optical fiber docking point is pressed firmly; the good flexibility of the flexible part 302 enables it to have better anti-fatigue ability, and it can also maintain the original performance of the pressing block 3 after multiple unlocking and locking operations, avoiding the reduction of the stability of the optical fiber connector.

[0080] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. An optical ferrule assembly, comprising: A tail seat, on which a window portion is provided, and a support platform is arranged inside the window portion; an opening is provided at one end of the tail seat; An optical ferrule, in which a receiving cavity for accommodating an optical fiber is provided; one end of the optical ferrule passes through the opening and is combined with the support platform to form a stepped portion, and a groove portion corresponding to the window portion is provided thereon, and the receiving cavity is exposed on the groove portion; the other end of the optical ferrule is located outside the tail seat, and the other end of the optical ferrule outside the tail seat is a plug-in end; A pressing block; A lock, which is slidably sleeved on the tail seat, Characterized in that: The pressing block includes a pressing portion, a flexible portion and a tail handle portion, wherein the flexible portion connects the pressing portion and the tail handle portion respectively, the pressing portion is in contact connection with the groove portion, and the tail handle portion is in contact connection with the stepped portion; the maximum thickness H3 of the pressing portion is greater than the thickness H1 of the flexible portion and the thickness H2 of the tail handle portion respectively, the thickness H2 of the tail handle portion is greater than the thickness H1 of the flexible portion, and the vertical distance S1 between the bottom surface of the tail handle portion and the bottom surface of the pressing portion is less than the maximum vertical distance S2 between the top surface of the stepped portion and the bottom surface of the groove portion; The S1 and S2 satisfy: 0.02 mm ≤ S2 - S1; The H1 and H3 satisfy: ； 0.2 mm ≤ H1 ≤ 0.7 mm; When the optical ferrule assembly is in the unlocked state, the lock is located at the position corresponding to the tail handle portion, and there is a surplus space between the lower surface of the pressing portion and the bottom surface of the groove portion, and the height H4 of the surplus space ≤ the height difference S3 between the upper surface of the pressing portion and the upper surface of the flexible portion.

2. The ferrule assembly according to claim 1, wherein : The bottom surface of the pressing portion is a planar structure, and its width is less than the maximum width of the pressing portion.

3. The ferrule assembly according to claim 2, wherein : The ratio of the width K1 of the bottom surface of the pressing portion to the maximum width K2 of the pressing portion is (0.1 - 0.5):

1.

4. The ferrule assembly according to claim 1, wherein : The optical ferrule includes a first optical ferrule, a second optical ferrule and a connecting member, the plug-in end is arranged at the first optical ferrule, the groove portion is arranged at the second optical ferrule, and the first optical ferrule and the second optical ferrule are connected by the connecting member.

5. The ferrule assembly according to claim 1, wherein: A limiting hook and a slot are provided at one end of the tail seat away from the opening, and the slot extends along the long axis direction of the tail seat.

6. The ferrule assembly according to claim 5, wherein: One end of the tail seat is cylindrical, and the ratio of the width of the slot to the diameter of one end of the tail seat is not greater than 0.5:

1.

7. A fiber optic quick connector, characterized in that: It includes a main body and the optical ferrule assembly according to any one of claims 1 - 6, and the optical ferrule assembly is installed in the main body.

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