Optical fiber connector

Abstract

The utility model discloses an optical fiber connector, comprising an insertion core assembly which comprises an insertion core body and a tail handle fixedly connected to the rear part of the insertion core body; the device is characterized by further comprising a check ring which is arranged on the outer side of the tail handle in a sleeving mode, and the rear portion of the tail handle is exposed out of the check ring; the crimping ring is crimped and fixed on the outer side of the rear part of the tail handle; the tail sleeve is arranged on the outer side of the check ring in a sleeving mode and fixedly connected with the check ring. According to the utility model, the tail sleeve is fixedly connected with the check ring instead of the conventional crimping ring connection. When the insertion core bears axial thrust, the tail handle drives the crimping ring to move backwards, but the displacement action cannot be conducted to the tail sleeve due to the fact that the tail sleeve is fixed to the check ring and disconnected from the crimping ring, and therefore interference to data transmission of optical fiber butt joint is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field, concretely relates to a kind of optical fiber connectors. BACKGROUND

[0002] Optical fiber connector is used to connect optical fiber device, it can realize the quick, reliable connection between optical fiber, ensure the effective transmission of optical signal, plays a key role in many fields such as optical fiber communication system.Optical fiber connector generally includes the ferrule for optical fiber butt joint, the tail handle fixedly connected to the rear end of ferrule, the spring for providing the butt joint elastic force of ferrule, the compression ring connecting optical cable and connector, and the tail sleeve for protecting the rear end optical cable of connector.In conventional technology, optical cable is compressed on the tail handle by compression ring, and the tail sleeve is clamped by the edge formed by compression ring compression, can refer to the traction assembly, optical fiber connector and its manufacturing method and assembly method (application number 2014102870485) and the integrated compression LC connector (application number 2016204098592) such as Chinese invention patent application or utility model patent.

[0003] However, when optical fiber connector is butt jointed with equipment in actual operation, the ferrule will bear axial thrust, the thrust will promote the tail handle to move towards rear, and then drive tail sleeve to retract backwards.This situation will interfere with the normal transmission of butt joint data in some time, and seriously it can also cause butt joint failure, affect the normal operation of entire communication system. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the tail sleeve does not retract backwards when the tail handle moves towards rear.

[0005] The utility model solves the technical problem that the tail sleeve does not retract backwards when the tail handle moves towards rear.

[0006] Ferrule assembly, including ferrule body and tail handle fixedly connected to the rear of ferrule body;

[0007] It is characterized in that, still include

[0008] Stop ring, is sleeved in the outside of tail handle, and tail handle rear is exposed to stop ring;

[0009] Compression ring, is compressed and fixed to the outside of the rear of tail handle;

[0010] Tail sleeve, is sleeved in the outside of stop ring, and is fixedly connected with stop ring.

[0011] The tail sleeve and the stop ring have various optional fixed connection modes. In consideration of the fixing strength and processing difficulty, as an optimization, the stop ring has a first annular protruding rib protruding from the outer wall surface, a plurality of first annular protruding ribs are arranged along the axial direction, and a first annular groove is formed between adjacent two first annular protruding ribs;

[0012] The tail sleeve has a second annular protruding rib protruding from the inner wall surface, a plurality of second annular protruding ribs are arranged along the axial direction, and a second annular groove is formed between adjacent two second annular protruding ribs;

[0013] The first annular groove is engaged with the second annular protruding rib, and the second annular groove is engaged with the first annular protruding rib, so that the tail sleeve and the stop ring are fixedly connected.

[0014] In order to prevent the tail sleeve from rotating during assembly, as an optimization, the outer wall of the stop ring has an axial clamping groove recessed relative to the first annular protruding rib, and the inner wall of the tail sleeve has an axial clamping strip protruding relative to the second annular groove, the axial clamping strip being clamped in the axial clamping groove;

[0015] Alternatively, the outer wall of the stop ring has an axial clamping strip protruding relative to the first annular groove, and the inner wall of the tail sleeve has an axial clamping groove recessed relative to the second annular protruding rib, the axial clamping strip being clamped in the axial clamping groove.

[0016] In order to further prevent the tail sleeve from being affected by the ferrule assembly and retreating, as an optimization, the front part of the tail sleeve has a first axial channel accommodating the crimp ring, the rear part of the tail sleeve has a second axial channel through which the optical cable passes, the diameter of the first axial channel is greater than that of the second axial channel, the first axial channel communicates with the second axial channel and a step surface is formed at the junction of the two channels due to the change in diameter, and the crimp ring and the step surface have a buffer space. In this structure, the crimp ring can move in the buffer space when the connector is connected, and the connecting force of the connector will not be applied to the tail sleeve.

[0017] In order to enable the traction rope to rotate freely when the optical fiber connector is inserted into the tube, as an optimization, the optical fiber connector further comprises a ferrule protection structure, which comprises

[0018] a rear protection sleeve for sleeving outside the ferrule assembly, the front end of which has a ball-shaped clamping part;

[0019] a front protection sleeve, which is detachably connected with the rear protection sleeve, the rear end of which has a bayonet part corresponding to the clamping part, and the front end of which has a rope passing opening for passing the traction rope, the bayonet part and the clamping part being matched to rotatably connect the front protection sleeve and the rear protection sleeve.

[0020] To facilitate the insertion of the rear protective cover into the front protective cover's latch, preferably, the front protective cover includes a first body and a second body divided along a longitudinal section. The first body and the second body are detachably connected, and the latch is also divided into two parts along the section. When the first body and the second body are assembled, the two parts of the latch combine to form a complete latch.

[0021] To facilitate the installation and positioning of the first and second sets, preferably, the mating surfaces of the first and second sets are provided with corresponding positioning points and positioning slots.

[0022] To achieve a detachable connection between the first and second sets, specifically, the first set is provided with an elastic snap-fit ​​strip that opens in a V-shape, and the second set has a corresponding snap-fit ​​through hole.

[0023] To achieve a detachable connection between the ferrule protection structure and the connector body, specifically, the outer wall of the stop ring is provided with an external thread, and the inner wall of the rear protective sleeve is provided with an internal thread that is threadedly connected to the stop ring.

[0024] Compared with the prior art, the improvement of this utility model is that the tail sleeve is changed from being fixedly connected to the crimping ring in the conventional way to being fixedly connected to the retaining ring. When the ferrule is subjected to axial thrust, the tail shank drives the crimping ring to move backward. However, since the tail sleeve is fixed to the retaining ring and disconnected from the crimping ring, this displacement will not be transmitted to the tail sleeve, thereby avoiding interference with the data transmission of the optical fiber connection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 An explosion diagram;

[0027] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 This is a schematic diagram of the structure of the stop ring and tail sleeve in an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the ferrule protection structure according to an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the first and second sets of bodies according to an embodiment of the present utility model;

[0032] Figure 8This is a schematic diagram of the assembly of the connector body and the SC connector outer frame according to an embodiment of the present invention. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figures 1-8 The image shows a preferred embodiment of an optical fiber connector according to this utility model.

[0035] This embodiment describes an SC connector, which mainly includes a connector body 1, a ferrule protection structure 2, and an SC connector outer frame 3. When installation through conduit is required, the ferrule protection structure 2 is fitted onto the front end of the connector body 1, as shown below. Figure 1 As shown; after the tubing is installed, remove the ferrule protection structure 2, and replace it with the SC connector outer frame 3 at the front end of the connector body 1, as shown. Figure 8 As shown.

[0036] refer to Figure 2 The connector body 1 includes a ferrule assembly 11 for fiber optic splicing, a stop ring 14 for controlling the retraction distance of the ferrule assembly 11, a spring 13 for providing splicing elasticity, a crimping ring 16 for connecting the optical cable and the ferrule assembly 11, and a tail sleeve 17 for protecting the optical cable at the rear end of the connector. The ferrule assembly 11 includes a ferrule body 111 and a tail shank 112 fixedly connected to the rear of the ferrule body 111; the stop ring 14 is sleeved on the outside of the tail shank 112, with the rear of the tail shank 112 exposed outside the stop ring 14; one end of the spring 13 acts on the tail shank 112 and the other end acts on the stop ring 14; the crimping ring 16 is crimped and fixed to the outside of the rear of the tail shank 112; the tail sleeve 17 is sleeved on the outside of the stop ring 14 and fixedly connected to the stop ring 14.

[0037] When the ferrule assembly 11 is subjected to axial thrust, the tail shank 112 drives the crimping ring 16 to move backward. However, since the tail sleeve 17 is fixed to the stop ring 14 and disconnected from the crimping ring 16, this displacement action will not be transmitted to the tail sleeve 17, thereby avoiding interference with the data transmission of the optical fiber connection.

[0038] In this embodiment, the tail sleeve 17 and the stop ring 14 are fixed by a snap-fit ​​connection, such as... Figures 3-5 As shown. The stop ring 14 has a first annular rib 141 protruding from the outer wall surface. Multiple first annular ribs 141 are arranged at intervals along the axial direction, and a first annular groove 142 is formed between two adjacent first annular ribs 141. The tail sleeve 17 has a second annular rib 171 protruding from the inner wall surface. Multiple second annular ribs 171 are arranged at intervals along the axial direction, and a second annular groove 172 is formed between two adjacent second annular ribs 171. The first annular groove 142 engages with the second annular rib 171, and the second annular groove 172 engages with the first annular rib 141, thereby securing the tail sleeve 17 to the stop ring 14.

[0039] To prevent the tail sleeve 17 from rotating during assembly, as follows: Figure 5 As shown, in this embodiment, the outer wall of the stop ring 14 has an axial groove 143 that is recessed relative to the first annular rib 141, and the inner wall of the tail sleeve 17 has an axial retaining strip 173 that protrudes relative to the second annular groove 172. The axial retaining strip 173 is engaged in the axial groove 143. In actual production, another opposite structure can also be selected as needed, that is, the outer wall of the stop ring 14 is provided with an axial retaining strip that protrudes relative to the first annular groove 142, and the inner wall of the tail sleeve 17 is provided with an axial groove that is recessed relative to the second annular rib 171. The axial retaining strip is engaged in the axial groove.

[0040] The tail sleeve 17 has a first axial channel 174 at its front to accommodate the crimping ring 16, and a second axial channel 175 at its rear for the optical cable to pass through. The diameter of the first axial channel 174 is larger than that of the second axial channel 175. The first axial channel 174 and the second axial channel 175 are connected, and a stepped surface 176 is formed at their junction due to the change in diameter. A buffer space 177 is provided between the crimping ring 16 and the stepped surface 176. In this structure, the crimping ring 16 can move within the buffer space 177 when the connector is mated, without applying the mating thrust to the tail sleeve 17, further preventing the tail sleeve 17 from retracting due to the influence of the ferrule assembly 11.

[0041] The ferrule protection structure 2 includes a rear protective sleeve 22 and a front protective sleeve 21, such as Figure 3 and Figure 6 As shown. The rear protective sleeve 22 is directly fitted onto the outside of the insert assembly 11, and its inner wall is provided with an internal thread that is threaded to the stop ring 14, so that the rear protective sleeve 22 is detachably connected to the connector body 1. The front protective sleeve 21 and the rear protective sleeve 22 are connected by a snap-fit. In this embodiment, the front end of the rear protective sleeve 22 is provided with a notch-shaped snap-fit ​​portion 221, that is, a part of a ball cut off by a plane. The rear end of the front protective sleeve 21 is provided with a snap-fit ​​portion 214 that matches the snap-fit ​​portion 221, and the front end of the front protective sleeve 21 has a rope-threading opening 211 for threading a traction rope.

[0042] To facilitate the insertion of the snap-fit ​​portion 221 of the rear protective cover 22 into the snap-fit ​​portion 214 of the front protective cover 21, the front protective cover 21 is composed of a first sleeve body 21A and a second sleeve body 21B, which are divided along a longitudinal section. The first sleeve body 21A and the second sleeve body 21B are detachably connected. The snap-fit ​​portion 214 is also divided into two parts along the cutting surface. When the first sleeve body 21A and the second sleeve body 21B are assembled, the two parts of the snap-fit ​​portion 214 are combined to form a complete snap-fit ​​portion 214, as shown below. Figure 7 As shown.

[0043] The cutting surfaces of the first set of bodies 21A and the second set of bodies 21B are respectively provided with corresponding positioning clamping points 215 and positioning clamping grooves 216, which facilitate the installation and positioning of the first set of bodies 21A and the second set of bodies 21B. In this embodiment, four positioning clamping points 215 and four positioning clamping grooves 216 are respectively arranged, and are distributed at intervals in the four corners of the cutting surface. After basic positioning is completed, the first set of bodies 21A and the second set of bodies 21B are clamped to complete the installation. Specifically, the first set of bodies 21A is provided with elastic clamping strips 212 that are V-shaped and open, and the second set of bodies 21B has corresponding clamping through holes 213. After the elastic clamping strips 212 are clamped into the clamping through holes 213, they are stretched to both sides under the action of elasticity, so that the first set of bodies 21A and the second set of bodies 21B are clamped and fixed.

Claims

1. An optical fiber connector, comprising a ferrule assembly (11) comprising a ferrule body (111) and a tail handle (112) fixedly connected to the rear of the ferrule body (111); characterized in that further comprising a stop ring (14) sleeved on the outside of the tail handle (112), the rear of the tail handle (112) being exposed outside the stop ring (14); a crimp ring (16) crimped and fixed to the outside of the rear of the tail handle (112); a boot (17) sleeved on the outside of the stop ring (14) and fixedly connected with the stop ring (14).

2. The fiber optic connector of claim 1, wherein, The stop ring (14) has a first annular protruding rib (141) protruding from the outer wall surface, a plurality of first annular protruding ribs (141) being arranged axially at intervals, and a first annular groove (142) being formed between adjacent two first annular protruding ribs (141); The boot (17) has a second annular protruding rib (171) protruding from the inner wall surface, a plurality of second annular protruding ribs (171) being arranged axially at intervals, and a second annular groove (172) being formed between adjacent two second annular protruding ribs (171); The first annular groove (142) is engaged with the second annular protruding rib (171), and the second annular groove (172) is engaged with the first annular protruding rib (141), so that the boot (17) is fixedly connected with the stop ring (14).

3. The fiber optic connector of claim 2, wherein, The outer wall of the stop ring has an axial clamping groove recessed relative to the first annular protruding rib, and the inner wall of the boot has an axial clamping strip protruding relative to the second annular groove, the axial clamping strip being clamped in the axial clamping groove; Or, the outer wall of the stop ring has an axial clamping strip protruding relative to the first annular groove, and the inner wall of the boot has an axial clamping groove recessed relative to the second annular protruding rib, the axial clamping strip being clamped in the axial clamping groove.

4. The fiber optic connector of any one of claims 1-3, wherein, The front of the boot (17) has a first axial channel (174) accommodating the crimp ring (16), and the rear of the boot (17) has a second axial channel (175) for the optical cable to pass through, the diameter of the first axial channel (174) being larger than that of the second axial channel (175), the first axial channel (174) being in communication with the second axial channel (175) and a step surface (176) being formed at the junction of the two due to the change in diameter, and the crimp ring (16) and the step surface (176) having a buffer space (177) therebetween.

5. The fiber optic connector of claim 4, wherein, Further comprising a ferrule protection structure (2), the ferrule protection structure (2) comprising a rear protection sleeve (22) for sleeving on the outside of the ferrule assembly (11), the front end of the rear protection sleeve (22) having a ball-shaped clamping portion (221); a front protection sleeve (21) detachably connected with the rear protection sleeve (22), the rear end of the front protection sleeve (21) having a bayonet portion (214) corresponding to the clamping portion (221), and the front end of the front protection sleeve (21) having a rope passing opening (211) for passing a pulling rope, the bayonet portion (214) and the clamping portion (221) being matched to rotatably connect the front protection sleeve (21) with the rear protection sleeve (22).

6. The fiber optic connector of claim 5, wherein, The front protective sleeve (21) comprises a first sleeve body (21A) and a second sleeve body (21B) which are divided along a longitudinal section, the first sleeve body (21A) and the second sleeve body (21B) are detachably connected, and the bayonet portion (214) is also divided into two parts along the section, and when the first sleeve body (21A) and the second sleeve body (21B) are assembled, the two parts of the bayonet portion (214) are combined into a complete bayonet portion (214).

7. The fiber optic connector of claim 6, wherein, The abutting surfaces of the first sleeve body (21A) and the second sleeve body (21B) are respectively provided with corresponding positioning clamping points (215) and positioning clamping grooves (216).

8. The fiber optic connector of claim 7, wherein, The first sleeve body (21A) is provided with an elastic clamping strip (212) which is V-shaped and opened, and the second sleeve body (21B) has a corresponding clamping through hole (213).

9. The fiber optic connector of claim 5, wherein, The outer wall of the stop ring (14) is provided with external threads, and the inner wall of the rear protective sleeve (22) is provided with internal threads which are threadedly connected with the stop ring (14).

Images