CN210270274U - Optical fiber contact element - Google Patents

Abstract

An optical fiber contact element relates to the field of design of optical passive components; the device comprises a ceramic ferrule, a ferrule tailstock, an O-shaped ring, a spring, a ring, a fixing clamp, a rear seat, a crimping sleeve and a fixing sleeve; the core insert tailstock is sleeved on the outer wall of the axial tail end of the ceramic core insert; the axial front end of the rear seat is sleeved on the outer wall of the insertion core tailstock; the fixing clamp is sleeved on the outer wall of the axial front end of the rear seat and is positioned at the butt joint of the rear seat and the insertion core tailstock; the axial front end of the crimping sleeve is sleeved on the outer wall of the axial tail end of the rear seat; the ring is sleeved on the outer wall of the ferrule tailstock and is positioned at the axial front ends of the fixing clamp and the rear seat; the O-shaped ring is sleeved on the outer wall of the axial front end of the core inserting tailstock; the axially rearward end of the spring is in contact with the ring; the fixing sleeve is sleeved on the outer walls of the ferrule tailstock and the fixing clamp; the utility model solves the problems that the existing optical fiber contact element has large processing and assembling difficulty, and optical fiber micro-bending is easy to generate when the butt joint is stressed; the optical fiber contact piece fixing structure is simplified, and the installation and maintenance efficiency of the optical fiber connector is improved.

Description

Optical fiber contact element

Technical Field

The utility model relates to a passive components and parts design field of light, especially an optic fibre contact.

Background

The optical fiber connector is an optical passive component with the largest use amount in an optical system, the performance of the connector has an extremely important influence on the whole communication line, and the optical fiber contact piece is used as a channel for optical transmission in the connector and directly determines the performance of the connector. The existing optical fiber contact element consists of a ceramic ferrule, a flange plate, a spring, a sleeve and a crimping sleeve. And the optical fiber of the optical cable penetrates through the flange plate to be connected with the rear end of the ceramic ferrule. The structure for fixing the contact element mainly comprises a front cover plate, fixing claws and a rear cover plate, wherein the front cover plate and the rear cover plate are bonded through adhesive, and the fixing claws are arranged in the mounting holes of each contact element in advance.

The above-described optical fiber contact member has the following problems: (1) the difficulty of part processing is high. The end of the sleeve 4 is provided with a U-shaped slot, which not only needs to increase the part working procedure, but also increases the processing difficulty of the part. The sleeve part belongs to a thin-wall part, and the size precision can be influenced by slotting, so that the processing efficiency of the part is influenced. (2) The assembly difficulty of the contact is high. In the prior art, the ferrule is assembled back and forth from the fiber contact. In order to ensure that parts such as the sleeve, the flange plate, the spring and the like form a whole, the end part of the sleeve needs to be curled to the front end surface of the flange plate when the sleeve is assembled; the part crimping is a special process, many parameters are not controllable in the crimping process, and the sizes of the sleeve, such as the radial tolerance, the axial tolerance, the form and position tolerance and the like, can not be accurately controlled, so that the assembly difficulty of the optical fiber contact element is solved. (3) The effect of optical properties. Because aramid fiber and oversheath all are as an organic whole through the afterbody crimping of crimping cover 5 and sleeve 4 in the optical cable, when the optical fiber contact butt joint, the ceramic lock pin moves backward with the ring flange atress, and inside optic fibre easily forms the microbend between ring flange afterbody and sleeve afterbody crimping position, influences optical properties. (4) The contact fixing structure is complicated to assemble. The front cover plate 6 and the rear cover plate 7 in the contact fixing structure need to be bonded through adhesive, and the curing time of the adhesive is long. The installation of stationary dog is required for the directionality, has the risk of misloading, after front shroud and back shroud bonding are firm, can't reprocess. (5) there is a risk of fixation failure. The contact receives backward pressure effect when the butt joint, and the jack catch front end of stationary dog is in unsettled state this moment, and the too big jack catch that can lead to of stress warp, has the risk of fixed inefficacy.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides an optical fiber contact element, which solves the problems that the existing optical fiber contact element has large processing and assembling difficulty, and optical fiber micro-bending is easy to occur when butt joint is stressed; the optical fiber contact piece fixing structure is simplified, and the installation and maintenance efficiency of the optical fiber connector is improved.

The above object of the present invention is achieved by the following technical solutions:

an optical fiber contact element comprises a ceramic ferrule, a ferrule tailstock, a fixing clamp, a backseat, a crimping sleeve and a fixing sleeve; the ceramic ferrule is a horizontally placed vertical rod-shaped structure; the core-inserting tailstock is of a hollow sleeve structure; the core insert tailstock is sleeved on the outer wall of the axial tail end of the ceramic core insert; the rear seat is a hollow sleeve structure which is horizontally arranged; the axial front end of the rear seat is sleeved on the outer wall of the insertion core tailstock; the fixing clamp is of a hollow sleeve structure; the fixing clamp is sleeved on the outer wall of the axial front end of the rear seat and is positioned at the butt joint of the rear seat and the insertion core tailstock; the crimping sleeve is of a hollow sleeve structure; the axial front end of the crimping sleeve is sleeved on the outer wall of the axial tail end of the rear seat; the fixed sleeve is sleeved on the outer walls of the insertion core tailstock and the fixed clamp.

The optical fiber contact element further comprises an O-shaped ring, a spring and a ring; wherein, the ring is sleeved on the outer wall of the core-inserting tailstock and is positioned at the axial front ends of the fixing clamp and the backseat; the O-shaped ring is sleeved on the outer wall of the axial front end of the core inserting tailstock; the spring is sleeved on the outer wall of the ferrule tailstock; the axial front end of the spring is contacted with the outer wall of the insertion core tailstock; the axially rearward end of the spring is in contact with the ring; the O-shaped ring, the spring and the ring are positioned between the outer wall of the core-inserting tailstock and the inner wall of the fixed sleeve.

In the optical fiber contact member, a groove is formed in the outer wall of the axial front end of the ferrule tailstock; the groove is an annular groove; the O-shaped ring is sleeved in the groove; the outer wall of the front end of the axial direction of the insertion core tailstock is provided with a first step; the first step limits the axial front end of the spring; a second step is arranged on the outer wall of the axial middle part of the ferrule tailstock; the second step realizes the limit of the axial displacement of the ring; the back end outer wall of the inserting core tailstock is provided with a first chamfer.

In the optical fiber contact element, an annular step is arranged at the axial tail end of the fixing clamp; 4U-shaped grooves are uniformly and symmetrically formed in the side wall of the axial front end of the fixing clamp; an annular third step is arranged at the axial front end of the U-shaped groove; the third step is brought into contact with the ring; the annular step makes contact with the backseat.

In the optical fiber contact element, a second chamfer is arranged on the inner wall of the axial front end of the rear seat; a fourth step is arranged on the outer wall of the axial middle part of the rear seat; the axial front end face of the fourth step is contacted with the annular step; the axial rear end face of the fourth step realizes the limitation of the crimping sleeve; the rear seat is provided with an annular groove on the outer wall of the rear end of the rear seat shaft; the annular groove is matched with the crimping sleeve to achieve crimping of the optical cable.

In the above one of the optical fiber contacts, the second chamfer is mated with the first chamfer; the angles of the first chamfers of the second chamfers are all 30 degrees from the axis.

In the optical fiber contact member, the axial front end of the ferrule tailstock is in interference fit with the ceramic ferrule.

In the optical fiber contact element, the fixing sleeve is of a hollow sleeve structure; the fixed sleeve comprises a front cylinder section, a middle cylinder section and a rear cylinder section; the front barrel section, the middle barrel section and the rear barrel section are sequentially connected along the axial direction; the front cylinder section is sleeved on the axial front end of the insertion core tailstock and the outer wall of the O-shaped ring; the middle cylinder section is sleeved on the outer wall of the spring; the back section of thick bamboo suit is at the outer wall of fixation clamp.

In the optical fiber contact element, a third chamfer is arranged at the joint of the front barrel section and the middle barrel section; the third chamfer realizes the guiding function on the axial front end of the plug tail seat and the limiting function on the first step; a fourth chamfer is arranged at the joint of the middle cylinder section and the rear cylinder section; a fifth chamfer is arranged at the axial tail end of the rear barrel section; the fifth chamfer realizes the guiding function on the third step; when the third step stretches into the rear barrel section from the fifth chamfer and reaches the position of the fourth chamfer, the fourth chamfer realizes the limit of the third step.

In the above optical fiber contact member, the third chamfer has an angle of 25 ° with the horizontal axis; the fourth chamfer forms an included angle of 45 degrees with the horizontal axis; the fifth chamfer is angled 30 from the horizontal axis.

Compared with the prior art, the utility model have following advantage:

(1) the contact element of the utility model has simple processing and assembling process and easy operation;

(2) the optical fiber can not be slightly bent in the butt joint process of the contact element, so that the influence on the optical performance is reduced;

(3) the contact element is provided with a limit step, so that the contact element can still be ensured to be reliably butted when the optical cable is stressed;

(4) the contact element of the utility model is more convenient to take and unload;

(5) different from the fixed claw structure which adopts a cantilever support mode to fix the contact element, the contact element adopts a surface-to-surface contact support and fixation mode which is more reliable;

(6) the contact fixing structure adopts an integrated processing mode, has a simple structure and reduces the assembly time.

Drawings

FIG. 1 is a schematic view of an optical fiber contact element according to the present invention;

FIG. 2 is a schematic view of the ferrule-based tailstock of the present invention;

FIG. 3 is a schematic view of the fixing clip of the present invention;

FIG. 4 is a schematic view of the rear seat of the present invention;

fig. 5 is a schematic view of the fixing sleeve of the present invention;

fig. 6 is a schematic view of the optical fiber contact element and the fixing sleeve of the present invention.

Detailed Description

The invention will be described in further detail with reference to the following figures and specific embodiments:

the utility model provides an optic fibre contact has solved that current optic fibre contact processing, the assembly degree of difficulty are big, easily produces the little curved scheduling problem of optic fibre during the butt joint atress. The novel optical fiber contact element with the tensile resistance and the detachable performance is provided, the fixing structure of the optical fiber contact element is simplified, and the installation and maintenance efficiency of the optical fiber connector is improved.

As shown in fig. 1, a schematic diagram of an optical fiber contact element is shown, and it can be seen that the optical fiber contact element is characterized in that: the device comprises a ceramic ferrule 9, a ferrule tailstock 10, an O-shaped ring 11, a spring 12, a ring 13, a fixing clamp 14, a rear seat 15, a crimping sleeve 16 and a fixing sleeve 17; the ceramic ferrule 9 is a horizontally arranged vertical rod-shaped structure; the core-insert tailstock 10 is of a hollow sleeve structure; the core insert tailstock 10 is sleeved on the outer wall of the axial tail end of the ceramic core insert 9; the rear seat 15 is a hollow sleeve structure which is horizontally placed; the axial front end of the rear seat 15 is sleeved on the outer wall of the core-inserting tailstock 10; the fixing clamp 14 is of a hollow sleeve structure; the fixing clamp 14 is sleeved on the outer wall of the axial front end of the rear seat 15 and is positioned at the butt joint of the rear seat 15 and the insertion core tailstock 10; the crimping sleeve 16 is of a hollow sleeve structure; the axial front end of the crimping sleeve 16 is sleeved on the outer wall of the axial tail end of the rear seat 15; the fixing sleeve 17 is sleeved on the outer walls of the ferrule tailstock 10 and the fixing clamp 14. The ring 13 is sleeved on the outer wall of the ferrule tailstock 10 and is positioned at the axial front ends of the fixing clamp 14 and the rear seat 15; the O-shaped ring 11 is sleeved on the outer wall of the axial front end of the core inserting tailstock 10; the spring 12 is sleeved on the outer wall of the core inserting tailstock 10; and the axial front end of the spring 12 contacts with the outer wall of the core-insert tailstock 10; the axially rear end of the spring 12 is in contact with the ring 13; the O-ring 11, the spring 12 and the ring 13 are positioned between the outer wall of the ferrule tailstock 10 and the inner wall of the fixing sleeve 17. The axial front end of the ferrule tailstock 10 is in interference fit with the ceramic ferrule 9. The O-shaped ring 11 is arranged in a groove 101 of the ferrule tailstock 10, and the O-shaped ring 11 is tightly attached to the inner wall of the mounting hole after the contact element is arranged on the fixed sleeve 17, so that the sealing effect is achieved. The middle part of the excircle of the ferrule tailstock 10 is provided with a limiting step, and when the contact element is under tension, the limiting step limits the distance of the whole backward movement of the contact element, so that the butted contact element can be reliably contacted. The front end face of the ring 13 supports the spring; the back end face is designed with a chamfer structure and is attached to the inner step face of the front end of the fixing clamp 14. When the contact pieces are butted, the spring 12 is compressed, and the core insert tailstock 10 moves back and forth in an inner hole of the ring 13.

As shown in fig. 2, which is a schematic diagram of a ferrule tailstock, it can be seen that the outer wall of the axial front end of the ferrule tailstock 10 is provided with a groove 101; the groove 101 is an annular groove; the O-shaped ring 11 is sleeved in the groove 101; the outer wall of the axial front end of the core insert tailstock 10 is provided with a first step 102; the first step 102 achieves the limit of the axial front end of the spring 12; the outer wall of the axial middle part of the core insert tailstock 10 is provided with a second step 103; the second step 103 limits the axial displacement of the ring 13; the rear end outer wall of the ferrule tailstock 10 is provided with a first chamfer 104.

As shown in fig. 3, which is a schematic view of the fixing clip, it can be seen that the axial tail end of the fixing clip 14 is provided with an annular step 143; 4U-shaped grooves 142 are uniformly and symmetrically formed in the side wall of the axial front end of the fixing clamp 14; an annular third step 141 is arranged at the axial front end of the U-shaped groove 142; 4 elastic claw structures are formed; the third step 141 comes into contact with the ring 13; the annular step 143 comes into contact with the rear seat 15.

As shown in fig. 4, which is a schematic view of the rear seat, it can be seen that the inner wall of the axial front end of the rear seat 15 is provided with a second chamfer 151; a fourth step 152 is arranged on the outer wall of the axial middle part of the rear seat 15; the axially front end face of the fourth step 152 comes into contact with the annular step 143; the axial rear end surface of the fourth step 152 limits the crimping sleeve 16; the rear seat 15 is provided with an annular groove 153 on the outer wall of the rear end in the axial direction; the annular groove 153 cooperates with the crimp sleeve 16 to effect crimping of the cable. The second chamfer 151 mates with the first chamfer 104; the second chamfer 151 and the first chamfer 104 are both angled at 30 ° to the axis.

As shown in fig. 5, which is a schematic view of the fixing sleeve, it can be seen that the fixing sleeve 17 has a hollow sleeve structure; the fixed sleeve 17 comprises a front cylinder section 171, a middle cylinder section 175 and a rear cylinder section 176; the front cylinder section 171, the middle cylinder section 175 and the rear cylinder section 176 are sequentially connected in the axial direction; wherein, the front cylinder section 171 is sleeved on the axial front end of the core-inserting tailstock 10 and the outer wall of the O-shaped ring 11; the middle cylinder section 175 is sleeved on the outer wall of the spring 12; rear barrel section 176 fits over the outer wall of retaining clip 14.

As shown in fig. 6, which is a schematic view of the optical fiber contact element and the fixing sleeve, it can be seen that a third chamfer 172 is provided at the junction of the front cylinder section 171 and the middle cylinder section 175; the third chamfer 172 realizes the guiding function on the axial front end of the ferrule tailstock 10 and the limiting function on the first step 102; a fourth chamfer 173 is arranged at the joint of the middle cylinder section 175 and the rear cylinder section 176; the axial tail end of the rear barrel section 176 is provided with a fifth chamfer 174; the fifth chamfer 174 provides a guide for the third step 141; when the third step 141 extends into the rear cylinder section 176 from the fifth chamfer 174 to the position of the fourth chamfer 173, the fourth chamfer 173 limits the third step 141. The third chamfer 172 forms an angle of 25 degrees with the horizontal axis; the fourth chamfer 173 makes an angle of 45 degrees with the horizontal axis; the fifth chamfer 174 is angled 30 from the horizontal axis.

The ferrule 9 is a core component of the contact member, and functions to realize the butt joint between the two contact members through the coupling sleeve. The front end of the ferrule tailstock 10 is in interference pressure joint with the ceramic ferrule 9. The O-ring 11 is mounted in the groove 101 of the ferrule tailstock 10. The first step 102 is abutted against the limiting step of the third chamfer 17225 degrees, and the contact piece is axially limited to be forwards separated in the fixing hole. The second step 103 in the middle of the ferrule tailstock 10 axially limits the moving distance of the ring 13, that is, the limit step limits the backward moving distance of the whole contact, so as to ensure that the butted contacts can be reliably contacted. The tail of the ferrule tailstock 10 is provided with a first chamfer 104 of 30 degrees, and the first chamfer is matched with a second chamfer 151 of 30 degrees, which is designed on the front end face of the backseat, so that the first chamfer and the second chamfer can be conveniently pressed. The fixing clamp is designed with 4U-shaped grooves 142, and 4 elastic claw structures are formed.

When assembling the contact member, the ceramic ferrule 9 and the ferrule rear seat 10 are firstly pressed in an interference manner, the spring 12, the ring 13 and the fixing clamp 14 are sequentially arranged, and then the rear seat 15 and the ferrule tail seat 10 are pressed in an interference manner. In the compression joint, the coaxiality of all parts is ensured. And then the O-shaped ring is arranged in the groove 101 of the ferrule tailstock 10. And injecting 353ND epoxy glue into the inner cavity of the contact element, and penetrating the stripped optical fiber from the tail end of the contact element until the bare fiber penetrates out of the front end face of the ceramic ferrule 9. The aramid fiber in the cable is crimped between the rear seat tail annular groove 154 and the crimp sleeve by crimp pliers. And then heating the contact element integrally to solidify the epoxy glue, and then grinding and polishing the end face of the optical fiber contact element by using a special grinding clamp.

The details of the present invention not described in detail in the specification are well known to those skilled in the art.

Claims (10)

1. An optical fiber contact, comprising: comprises a ceramic ferrule (9), a ferrule tailstock (10), a fixed clamp (14), a backseat (15), a crimping sleeve (16) and a fixed sleeve (17); wherein the ceramic ferrule (9) is a vertical rod-shaped structure which is horizontally placed; the core-inserting tailstock (10) is of a hollow sleeve structure; the core insert tailstock (10) is sleeved on the outer wall of the axial tail end of the ceramic core insert (9); the rear seat (15) is a hollow sleeve structure which is horizontally placed; the axial front end of the rear seat (15) is sleeved on the outer wall of the insertion core tailstock (10); the fixing clamp (14) is of a hollow sleeve structure; the fixing clamp (14) is sleeved on the outer wall of the axial front end of the rear seat (15) and is positioned at the butt joint of the rear seat (15) and the insertion core tail seat (10); the crimping sleeve (16) is of a hollow sleeve structure; the axial front end of the crimping sleeve (16) is sleeved on the outer wall of the axial tail end of the rear seat (15); the fixed sleeve (17) is sleeved on the outer walls of the ferrule tailstock (10) and the fixed clamp (14).

2. The fiber optic contact of claim 1, wherein: the device also comprises an O-shaped ring (11), a spring (12) and a ring (13); wherein, the ring (13) is sleeved on the outer wall of the core-inserting tailstock (10) and is positioned at the axial front ends of the fixing clamp (14) and the rear seat (15); the O-shaped ring (11) is sleeved on the outer wall of the axial front end of the core inserting tailstock (10); the spring (12) is sleeved on the outer wall of the ferrule tailstock (10); the axial front end of the spring (12) is contacted with the outer wall of the insertion core tailstock (10); the axially rear end of the spring (12) is in contact with the ring (13); the O-shaped ring (11), the spring (12) and the ring (13) are positioned between the outer wall of the ferrule tailstock (10) and the inner wall of the fixed sleeve (17).

3. The fiber optic contact of claim 2, wherein: the outer wall of the axial front end of the core insert tailstock (10) is provided with a groove (101); the groove (101) is an annular groove; the O-shaped ring (11) is sleeved in the groove (101); a first step (102) is arranged on the outer wall of the axial front end of the ferrule tailstock (10); the first step (102) limits the axial front end of the spring (12); a second step (103) is arranged on the outer wall of the axial middle part of the ferrule tailstock (10); the second step (103) limits the axial displacement of the ring (13); the rear end outer wall of the axial direction of the ferrule tailstock (10) is provided with a first chamfer (104).

4. The fiber optic contact of claim 3, wherein: the axial tail end of the fixing clamp (14) is provided with an annular step (143); 4U-shaped grooves (142) are uniformly and symmetrically formed in the side wall of the axial front end of the fixing clamp (14); an annular third step (141) is arranged at the axial front end of the U-shaped groove (142); the third step (141) being in contact with the ring (13); the annular step (143) makes contact with the rear seat (15).

5. The fiber optic contact of claim 4, wherein: a second chamfer (151) is arranged on the inner wall of the axial front end of the rear seat (15); a fourth step (152) is arranged on the outer wall of the axial middle part of the rear seat (15); the axial front end face of the fourth step (152) is in contact with the annular step (143); the axial rear end surface of the fourth step (152) limits the crimping sleeve (16); the rear seat (15) is provided with an annular groove (153) on the outer wall of the rear end of the shaft; the annular groove (153) is matched with the crimping sleeve (16) to crimp the optical cable.

6. The fiber optic contact of claim 5, wherein: the second chamfer (151) cooperates with the first chamfer (104); the angles of the second chamfer (151) and the first chamfer (104) are both 30 degrees from the axis.

7. The fiber optic contact of claim 6, wherein: the axial front end of the core insert tailstock (10) is in interference fit with the ceramic core insert (9).

8. The fiber optic contact of claim 7, wherein: the fixed sleeve (17) is of a hollow sleeve structure; the fixed sleeve (17) comprises a front cylinder section (171), a middle cylinder section (175) and a rear cylinder section (176); the front cylinder section (171), the middle cylinder section (175) and the rear cylinder section (176) are sequentially connected along the axial direction; wherein, the front cylinder section (171) is sleeved on the axial front end of the core-inserting tailstock (10) and the outer wall of the O-shaped ring (11); the middle cylinder section (175) is sleeved on the outer wall of the spring (12); the rear cylinder section (176) is sleeved on the outer wall of the fixing clamp (14).

9. The fiber optic contact of claim 8, wherein: a third chamfer (172) is arranged at the joint of the front barrel section (171) and the middle barrel section (175); the third chamfer (172) realizes the guiding function on the axial front end of the ferrule tailstock (10) and the limiting function on the first step (102); a fourth chamfer (173) is arranged at the joint of the middle cylinder section (175) and the rear cylinder section (176); a fifth chamfer (174) is arranged at the axial tail end of the rear cylinder section (176); the fifth chamfer (174) realizes the guiding function of the third step (141); when the third step (141) extends into the rear barrel section (176) from the fifth chamfer (174) and reaches the position of the fourth chamfer (173), the fourth chamfer (173) realizes the limit of the third step (141).

10. The fiber optic contact of claim 9, wherein: the third chamfer (172) forms an angle of 25 degrees with the horizontal axis; the fourth chamfer (173) forms an angle of 45 degrees with the horizontal axis; the fifth chamfer (174) is angled 30 from the horizontal axis.

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