Radio-frequency high-reliability rapid-plugging beam-expanding optical fiber plug

Abstract

The invention relates to the technical field of connectors, and discloses a radio-frequency high-reliability rapid-plugging beam-expanding optical fiber plug, which adopts a plug with a non-contact beam-expanding optical fiber contact element and is used for transmitting an optical signal modulated by a radio-frequency signal, so that the purpose that the plug has high return loss is achieved, signal reflection can be reduced when the plug is used for transmitting the signal, and the signal transmission efficiency is improved. Therefore, the signal loss is reduced, and the quality and stability of radio frequency signal transmission are improved. The non-contact beam-expanding optical fiber contact piece with the spring is adopted, the non-contact beam-expanding optical fiber contact piece of the plug and the non-contact beam-expanding optical fiber contact piece of the socket can be ensured to be in stable butt joint all the time in a vibration environment, the purposes of low insertion loss and high reliability are achieved, the screw pitch of the spring is 1.8-2mm, and the spring can have elastic force meeting the design requirement in a high-temperature environment. The reliability of the plug is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of connectors and discloses a radio frequency high-reliability quick-plug and beam-expanding optical fiber plug. Background Art

[0002] Radio frequency signals are modulated radio waves with a certain transmission frequency, ranging from 3kHz to 300GHz. Existing radio frequency plugs are devices used to connect or terminate coaxial cables, providing a channel for radio frequency signals between electronic devices. However, radio frequency plugs have low return loss. To improve signal transmission quality, a plug with high return loss must be provided that can adapt to harsh environments such as high temperature and vibration and has low insertion loss. Summary of the Invention

[0003] The purpose of the present invention is to provide a radio frequency high-reliability fast-plugging expanded beam optical fiber plug, which can adapt to harsh environments such as high temperature and vibration and has the performance of high return loss and low insertion loss.

[0004] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0005] A radio frequency high-reliability quick-plug expanded beam optical fiber plug, comprising:

[0006] A plug housing is connected to a connecting nut for connecting to a socket, wherein the inner wall of the connecting nut is provided with an arc groove, and the connecting nut is provided with a pin hole, and the pin hole is located at the end of the arc groove;

[0007] A pin mounting plate assembly is fixed in the plug housing;

[0008] A non-contact beam-expanding optical fiber contact is mounted on the pin mounting plate assembly and is used to transmit optical signals modulated by radio frequency signals. The non-contact beam-expanding optical fiber contact includes an outer shell, a spring, and a pin lens assembly. The outer shell is fixed in the jack mounting plate assembly. The pin lens assembly passes through the outer shell and can slide back and forth. The spring is sleeved on the outer wall of the pin lens assembly. One end of the spring abuts the pin lens assembly, and the other end abuts the outer shell. The pitch of the spring is 1.8-2mm.

[0009] Furthermore, the outer shell includes a small diameter section and a large diameter section, the spring is located in the large diameter section, and one end of the spring abuts against the inner wall step at the transition between the small diameter section and the large diameter section.

[0010] Furthermore, the ferrule lens assembly includes an optical fiber ferrule, and the optical fiber ferrule includes an inner shell and a ceramic ferrule. One end of the inner shell is fixed to the ceramic ferrule, and the other end of the inner shell is fixed to the optical fiber wire through a crimping ring.

[0011] Furthermore, the inner shell includes an inner shell small diameter section and an inner shell large diameter section, the inner shell small diameter section is provided with a stop ring abutting against the port of the outer shell small diameter section, the spring is sleeved on the outside of the inner shell small diameter section, and one end of the spring abuts against the outer wall step at the transition between the inner shell small diameter section and the inner shell large diameter section.

[0012] Furthermore, the pin lens assembly also includes a sleeve assembly, which includes a first ceramic sleeve and a self-focusing lens; the first ceramic sleeve is sleeved on the outside of the ceramic pin and fixed to the large-diameter section of the inner shell; the self-focusing lens is bonded inside the first ceramic sleeve.

[0013] Furthermore, the jack mounting plate assembly includes a first hole front mounting plate assembly, a second hole front mounting plate assembly and a hole rear mounting plate, the second hole front mounting plate assembly is fixed with a long positioning pin, the first hole front mounting plate assembly is positioned with the second hole front mounting plate assembly by the long positioning pin, and the first hole front mounting plate assembly, the second hole front mounting plate assembly and the hole rear mounting plate are fixed by a connecting assembly.

[0014] Furthermore, the connecting assembly includes a positioning sleeve, a first connecting screw and a second connecting screw, the positioning sleeve simultaneously passes through the second hole front mounting plate assembly and the hole rear mounting plate, the first connecting screw passes through the first hole front mounting plate assembly and is threadedly connected to the positioning sleeve, and the second connecting screw passes through the hole rear mounting plate and is threadedly connected to the positioning sleeve.

[0015] Furthermore, the first hole front mounting plate assembly includes a positioning mounting plate and a second ceramic sleeve, the positioning mounting plate includes a first positioning mounting plate and a second positioning mounting plate, the first positioning mounting plate is fixed to the second positioning mounting plate by a third connecting screw, the positioning mounting plate is provided with a sleeve hole passing through the first positioning mounting plate and the second positioning mounting plate, the second ceramic sleeve is installed in the sleeve hole, the inlet and outlet diameters of the sleeve hole are both smaller than the aperture of the sleeve hole, the outer diameter of the second ceramic sleeve is larger than the inlet and outlet diameters of the sleeve hole, the positioning mounting plate is also provided with a positioning pin avoidance hole, and the long positioning pin passes through the positioning pin avoidance hole.

[0016] Furthermore, the second hole front mounting plate assembly also includes a hole front mounting plate for fixing the long positioning pin.

[0017] Furthermore, the rear mounting plate is connected to a sealing body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The present invention uses a plug with a non-contact beam-expanding optical fiber contact to transmit an optical signal modulated by a radio frequency signal, thereby achieving the purpose of the plug having a high return loss. When the plug transmits a signal, it can reduce the reflection of the signal, thereby reducing signal loss and improving the quality and stability of radio frequency signal transmission.

[0020] (2) The present invention adopts a non-contact beam-expanding fiber optic contact with a spring. After the plug and the socket are connected, the non-contact beam-expanding fiber optic contacts of the plug and the socket are butted against each other, causing the pin lens assembly to retract and compress the spring. The spring enables the pin lens assembly to always maintain a tendency to extend forward. In a vibrating environment, it can ensure that the non-contact beam-expanding fiber optic contacts of the plug and the socket always maintain stable docking, achieving the purpose of low insertion loss and high reliability. In addition, the pitch of the spring is 1.8-2mm. In a high temperature environment, the spring can have an elastic force that meets the design requirements, thereby ensuring the reliability of the plug.

[0021] (3) The present invention adopts a connecting nut with a rotating arc groove and a pin hole, which matches the socket with a bayonet pin to achieve rapid plugging and unplugging of the plug and the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the plug in the embodiment;

[0023] Figure 2 Schematic diagram of the structure of the pin mounting plate assembly in the embodiment;

[0024] Figure 3 This is a schematic structural diagram of the second hole front mounting plate assembly in the embodiment;

[0025] Figure 4 Schematic diagram of the structure of the arc groove in the connecting nut in the embodiment;

[0026] Figure 5 Schematic diagram of the expansion of the arc groove in the connecting nut in the embodiment;

[0027] Figure 6 Schematic diagram of the structure of the non-contact beam expansion optical fiber contact in the embodiment;

[0028] Figure 7 Schematic diagram of the structure of the self-focusing lens in the embodiment;

[0029] Figure 8 Schematic diagram of the structure of the positioning key in the embodiment.

[0030] Among them, 1-plug housing, 11-limiting convex ring, 12-fixing snap ring, 211-outer housing, 212-crimping ring, 22-spring, 231-inner housing, 2311-stop ring, 232-ceramic pin, 233-first ceramic sleeve, 234-self-focusing lens, 3-jack mounting plate assembly, 31-first hole front mounting plate assembly, 311-first positioning mounting plate, 312-second positioning mounting plate, 313-sleeve hole, 3 14-third connecting screw, 316-second ceramic sleeve, 32-second hole front mounting plate assembly, 321-long positioning pin, 322-hole front mounting plate, 33-hole rear mounting plate, 34-sealing body, 35-mounting hole, 36-claw, 37-positioning sleeve, 38-first connecting screw, 39-second connecting screw, 4-connecting nut, 41-pin hole, 42-arc groove, 5-parallel coil retaining spring, 6-positioning key, 7-parallel coil corrugated spring. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the present invention to the following embodiments, as all technologies implemented based on the present invention fall within the scope of the present invention.

[0032] Example

[0033] See also Figure 1-8 , a radio frequency high-reliability quick-plug expanded beam optical fiber plug, comprising:

[0034] Plug housing 1;

[0035] The pin mounting plate assembly is fixed by the groove and the fixing ring 12 in the plug housing 1 and is potted with glue;

[0036] A non-contact beam-expanding fiber optic contact is installed in a pin mounting plate assembly and is used to transmit optical signals modulated by radio frequency signals. Optical signal transmission offers advantages such as high transmission bandwidth, high transmission capacity, high return loss, compact size, light weight, low loss, good interference resistance, strong confidentiality, and low crosstalk and interference. The present invention utilizes a receptacle with a non-contact beam-expanding fiber optic contact to transmit optical signals modulated by radio frequency signals, achieving the high return loss advantage of the receptacle. This reduces signal reflections during signal transmission, thereby reducing signal loss and improving the quality and stability of radio frequency signal transmission.

[0037] See also Figure 6 and Figure 7The non-contact beam expanding fiber optic contact comprises an outer shell 211, a spring 22, and a pin lens assembly. The outer shell 211 is fixed to the jack mounting plate assembly 3. The pin lens assembly extends through the outer shell 211 and can slide back and forth. The spring 22 is sleeved on the pin lens assembly, with one end of the spring 22 abutting the pin lens assembly and the other end abutting the outer shell 211. The pitch of the spring 22 is 1.8-2 mm. The spring 22 is made of a nickel-based high-temperature composite material that can withstand 600°C. Without the spring 22, a certain degree of relative displacement between the plug and the socket in a vibrating environment would cause the non-contact beam expanding fiber optic contact to deviate from the contactless beam expanding fiber optic contact, resulting in high insertion loss. This embodiment uses a non-contact beam expanding fiber optic contact with a spring 22. The material and pitch design of the spring 22 ensure its stability and elasticity in high-temperature environments. In high-temperature and vibrating environments, it can ensure that the non-contact beam expanding fiber optic contact between the plug and the socket always maintains stable docking, achieving low insertion loss and high reliability. It should be noted that in a high temperature environment, the spring coefficient of the spring 22 will become smaller. Therefore, in order to ensure that the spring 22 still has sufficient elastic force under high temperature conditions, the pitch of the spring 22 needs to be greater than the pitch under normal temperature conditions. Therefore, the pitch of the spring 22 in this embodiment is 1.8-2mm.

[0038] In certain embodiments, see Figure 1 The plug housing 1 is connected to a connecting nut 4 for connecting to a socket. The connecting nut 4 is limited by a parallel coil retaining spring 5 and a limiting convex ring 11 on the outer wall of the plug housing 1. A parallel coil corrugated spring 7 is installed between the connecting nut 4 and the outer wall convex ring of the plug housing 1. Figure 1 、 Figure 4 and Figure 5 The inner wall of the connecting nut 4 is provided with a rotation arc groove 42, and the connecting nut 4 is also provided with a pin hole 41. The pin hole 41 is located at the end of the rotation arc groove 42. When the plug is connected to the socket, the bayonet of the socket housing is squeezed downward and introduced into the rotation arc groove 42 of the plug housing 1. The connecting nut 4 of the plug is rotated. Through the sliding fit of the rotation arc groove 42 and the bayonet, the connecting nut 4 of the plug moves toward one side of the socket. When the bayonet pin of the socket is aligned with the pin hole 41, the bayonet pin of the socket bounces up under the action of the spring and is stuck in the pin hole 41, thereby realizing quick connection between the plug and the socket. Similarly, when the plug and socket need to be separated, press the bayonet pin of the socket downward and rotate the connecting nut 4 so that the bayonet pin is introduced into the rotation arc groove 42, thereby realizing quick separation.

[0039] In certain embodiments, see Figure 6 and Figure 7The outer shell 211 includes a small-diameter section and a large-diameter section. The transition between the small-diameter and large-diameter sections has an inner wall step. The spring 22 is located within the large-diameter section, and one end of the spring 22 abuts the inner wall step at the transition between the small-diameter and large-diameter sections. The ferrule lens assembly includes a fiber ferrule and a sleeve assembly. The optical fiber ferrule includes an inner shell 231 and a ceramic ferrule 232. The inner shell 231 is inserted into the contact piece outer shell 211. The inner shell 231 is a two-stage stepped tube structure, which includes an inner shell small diameter section and an inner shell large diameter section. The outer wall step is provided at the transition between the inner shell small diameter section and the inner shell large diameter section. The inner shell large diameter section is fixed to the ceramic ferrule 232. The inner shell small diameter section fixes the optical fiber conductor through the crimping ring 212. The inner shell small diameter section is provided with a stop ring 2311 that abuts the end of the outer shell small diameter section. The spring 22 is located in the outer shell large diameter section and is sleeved on the outside of the inner shell small diameter section. One end of the spring 22 abuts the outer wall step of the inner shell 231, and the other end abuts the inner wall step of the outer shell 211. The sleeve assembly includes a first ceramic sleeve 233 and a self-focusing lens 234. During assembly, the self-focusing lens 234 is first bonded to the first ceramic sleeve 233. The first ceramic sleeve 233 is then positioned outside the ceramic ferrule 232, where it is either interference-fitted or bonded to the larger diameter section of the inner shell. Light emitted from the optical fiber is collimated and amplified after passing through the self-focusing lens 234. When the two corresponding contacts in the plug and receptacle mate, non-contact optical transmission is achieved. In this embodiment, a non-contact beam-expanding fiber optic contact with a spring 22 is employed. When the plug and receptacle are connected, the non-contact beam-expanding fiber optic contacts of the plug and receptacle abut against each other, causing the ferrule lens assembly to retract and compressing the spring 22. The spring 22 maintains the ferrule lens assembly's forward extension. This ensures stable mating of the non-contact beam-expanding fiber optic contacts in a vibrating environment, achieving low insertion loss and high reliability.

[0040] It should be noted that, see Figure 7 The focal length of the self-focusing lens 234 is set to , so that the plug can be applied to optical fibers with both single-mode and multi-mode signal modes. At the same time, in order to improve the return loss, the angle ω is set to 2° or 4°.

[0041] In certain embodiments, see Figure 2 and Figure 3The jack mounting plate assembly 3 includes a first hole front mounting plate assembly 31, a second hole front mounting plate assembly 32 and a hole rear mounting plate 33. The second hole front mounting plate assembly 32 includes a hole front mounting plate 322 fixed with a long positioning pin 321. The first hole front mounting plate assembly 31 is positioned with the second hole front mounting plate assembly 32 through the long positioning pin 321. The first hole front mounting plate assembly 31, the second hole front mounting plate assembly 32 and the hole rear mounting plate 33 are fixed through a connecting assembly. Specifically, the connecting assembly includes a positioning sleeve 37, a first connecting screw 38 and a second connecting screw 39. The positioning sleeve 37 passes through the second hole front mounting plate assembly 32 and the hole rear mounting plate 33 at the same time. After the first connecting screw 38 passes through the first hole front mounting plate assembly 31, it is threadedly connected to the positioning sleeve 37. After the second connecting screw 39 passes through the hole rear mounting plate 33, it is threadedly connected to the positioning sleeve 37, thereby realizing the connection of the first hole front mounting plate assembly 31, the second hole front mounting plate assembly 32 and the hole rear mounting plate 33 into a whole. It should be noted that a sealing body 34 is also bonded to one end of the rear hole mounting plate 33 .

[0042] In certain embodiments, see Figure 2 , the first hole front mounting plate assembly 31 includes a positioning mounting plate and a second ceramic sleeve 316, the positioning mounting plate is composed of a first positioning mounting plate 311 and a second positioning mounting plate 312, specifically, the first positioning mounting plate 311 is fixed to the second positioning mounting plate 312 by a third connecting screw 314, the positioning mounting plate is provided with a sleeve hole 313 that passes through the first positioning mounting plate 311 and the second positioning mounting plate 312, the second ceramic sleeve 316 is installed in the sleeve hole 313, and the inlet and outlet diameters of the sleeve hole 313 are both smaller than the aperture of the sleeve hole 313, the outer diameter of the second ceramic sleeve 316 is larger than the inlet and outlet diameters of the sleeve hole 313, so, in order to facilitate the installation of the second ceramic sleeve 316 In the positioning mounting plate, this embodiment divides the positioning mounting plate into two parts, left and right. When assembling the second ceramic sleeve 316, first install the positioning pin on the second positioning mounting plate 312, then pass the first connecting screw 38 through the second positioning mounting plate 312, insert the second ceramic sleeve 316 into the sleeve hole 313 of the second positioning mounting plate 312, and then merge the first positioning mounting plate 311 with the second positioning mounting plate 312 to ensure that the second ceramic sleeve 316 is inserted into the sleeve hole 313 of the second positioning mounting plate 312 and the positioning pin is inserted into the pin hole of the first positioning mounting plate 311. Finally, use the third connecting screw 314 to lock the first positioning mounting plate 311 with the second positioning mounting plate 312.

[0043] It should be noted that, see Figure 2The positioning mounting plate is also provided with a positioning pin avoidance hole that passes through the first positioning mounting plate 311 and the second positioning mounting plate 312. When the one-hole front mounting plate 322 assembly and the second-hole front mounting plate assembly 32 are assembled, the long positioning pin 321 passes through the positioning pin avoidance hole and extends to the outside of the plug end face, serving as a guide pin for plugging into the socket.

[0044] It should be noted that a mounting hole 35 for mounting a non-contact beam expanding optical fiber contact is provided in the jack mounting plate assembly 3. The mounting hole 35 passes through the second hole front mounting plate assembly 32, the hole rear mounting plate 33 and the sealing body 34. The non-contact beam expanding optical fiber contact is installed in the mounting hole 35, and the non-contact beam expanding optical fiber contact is fixed by the claw 36. The sleeve assembly of the non-contact beam expanding optical fiber contact is inserted into the second ceramic sleeve 316. When the plug is connected to the socket, the corresponding non-contact beam expanding optical fiber contact in the socket will also be inserted into the second ceramic sleeve 316 of the plug, thereby realizing the docking of the non-contact beam expanding optical fiber contacts of the plug and the socket, and realizing non-contact optical transmission.

[0045] See also Figure 8 The plug of the present invention is positioned with the socket through five positioning keys and six slots, and has the functions of preventing oblique insertion and wrong insertion. The plug housing 1 is made of titanium alloy metal with good corrosion resistance, high specific strength and good heat resistance, and is resistant to harsh marine environments such as acid salt spray, acidic atmosphere, and mold.

[0046] The present invention adopts a plug with a non-contact expanded beam optical fiber contact to transmit an optical signal modulated by a radio frequency signal, so as to achieve the purpose of having a high return loss of the plug. When transmitting a signal, the plug can reduce the reflection of the signal, thereby reducing the signal loss and improving the quality and stability of the radio frequency signal transmission.

[0047] The present invention adopts a non-contact beam-expanding fiber optic contact with a spring 22. After the plug and the socket are connected, the non-contact beam-expanding fiber optic contacts of the plug and the socket butt against each other, causing the pin lens assembly to retract and compress the spring 22. The spring 22 ensures that the pin lens assembly always maintains a tendency to extend forward. In a vibrating environment, it can ensure that the non-contact beam-expanding fiber optic contacts of the plug and the socket always maintain stable docking, achieving the goals of low insertion loss and high reliability. In addition, the pitch of the spring 22 is 1.8-2mm. In a high-temperature environment, the spring 22 can have an elastic force that meets the design requirements, thereby ensuring the reliability of the plug.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A radio frequency high-reliability quick-plug expanded beam optical fiber plug, characterized in that: include: A plug housing (1), the plug housing (1) being connected to a connecting nut (4) for connecting to a socket, the inner wall of the connecting nut (4) being provided with a rotation arc groove (42), the connecting nut (4) being provided with a pin hole (41), the pin hole (41) being located at the end of the rotation arc groove (42); A pin mounting plate assembly is fixed in the plug housing (1); A non-contact beam-expanding optical fiber contact is installed on the pin mounting plate assembly and is used to transmit an optical signal modulated by a radio frequency signal. The non-contact beam-expanding optical fiber contact comprises an outer shell (211), a spring (22) and a pin lens assembly. The outer shell (211) is fixed in the jack mounting plate assembly (3). The pin lens assembly passes through the outer shell (211) and can slide back and forth. The spring (22) is sleeved on the outer wall of the pin lens assembly. One end of the spring (22) abuts against the pin lens assembly, and the other end abuts against the outer shell (211). The pitch of the spring (22) is 1.8-2 mm.

2. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 1, characterized in that: The outer shell (211) comprises an outer shell small diameter section and an outer shell large diameter section, wherein an inner wall step is provided at a transition point between the outer shell small diameter section and the outer shell large diameter section, the spring (22) is located in the outer shell large diameter section, and one end of the spring (22) abuts against the inner wall step.

3. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 2, characterized in that: The pin lens assembly includes an optical fiber pin, and the optical fiber pin includes an inner shell (231) and a ceramic pin (232). One end of the inner shell (231) is fixed to the ceramic pin (232), and the other end of the inner shell (231) is fixed to the optical fiber conductor through a crimping ring (212).

4. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 3, characterized in that: The inner shell (231) comprises an inner shell small diameter section and an inner shell large diameter section, the inner shell small diameter section is provided with a stop ring (2311) abutting against the port of the outer shell small diameter section, the spring (22) is sleeved on the outside of the inner shell small diameter section, and one end of the spring (22) abuts against the outer wall step at the transition between the inner shell small diameter section and the inner shell large diameter section.

5. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 4, characterized in that: The pin lens assembly further includes a sleeve assembly, which includes a first ceramic sleeve (233) and a self-focusing lens (234); the first ceramic sleeve (233) is sleeved on the outside of the ceramic pin (232) and fixed to the large-diameter section of the inner shell; the self-focusing lens (234) is bonded inside the first ceramic sleeve (233).

6. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 1, characterized in that: The jack mounting plate assembly (3) comprises a first hole front mounting plate assembly (31), a second hole front mounting plate assembly (32) and a hole rear mounting plate (33); the second hole front mounting plate assembly (32) is fixed with a long positioning pin (321); the first hole front mounting plate assembly (31) is positioned with the second hole front mounting plate assembly (32) via the long positioning pin (321); the first hole front mounting plate assembly (31), the second hole front mounting plate assembly (32) and the hole rear mounting plate (33) are fixed via a connecting assembly.

7. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 6, characterized in that: The connecting assembly includes a positioning sleeve (37), a first connecting screw (38) and a second connecting screw (39); the positioning sleeve (37) simultaneously passes through the second hole front mounting plate assembly (32) and the hole rear mounting plate (33); the first connecting screw (38) passes through the first hole front mounting plate assembly (31) and is threadedly connected to the positioning sleeve (37); the second connecting screw (39) passes through the hole rear mounting plate (33) and is threadedly connected to the positioning sleeve (37).

8. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 6, characterized in that: The first hole front mounting plate assembly (31) includes a positioning mounting plate and a second ceramic sleeve (316), the positioning mounting plate includes a first positioning mounting plate (311) and a second positioning mounting plate (312), the first positioning mounting plate (311) is fixed to the second positioning mounting plate (312) by a second connecting screw (39), the positioning mounting plate is provided with a sleeve hole (313) that passes through the first positioning mounting plate (311) and the second positioning mounting plate (312), the second ceramic sleeve (316) is installed in the sleeve hole (313), the inlet and outlet diameters of the sleeve hole (313) are both smaller than the aperture of the sleeve hole (313), the outer diameter of the second ceramic sleeve (316) is larger than the inlet and outlet diameters of the sleeve hole (313), the positioning mounting plate is also provided with a positioning pin avoidance hole, and the long positioning pin (321) passes through the positioning pin avoidance hole.

9. The radio frequency high-reliability quick-plug expanded beam optical fiber plug according to claim 6, characterized in that: The second hole front mounting plate assembly (32) further comprises a hole front mounting plate (322) for fixing the long positioning pin (321).

Images