CN105044851A - Optical fiber connector housing and optical fiber connector - Google Patents
Optical fiber connector housing and optical fiber connector Download PDFInfo
- Publication number
- CN105044851A CN105044851A CN201510214763.0A CN201510214763A CN105044851A CN 105044851 A CN105044851 A CN 105044851A CN 201510214763 A CN201510214763 A CN 201510214763A CN 105044851 A CN105044851 A CN 105044851A
- Authority
- CN
- China
- Prior art keywords
- lens
- joints
- optical fiber
- optical fibre
- dust excluding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to an optical fiber connector housing and an optical fiber connector. The optical fiber connector housing comprises a body and the front end of the body is in the form of a plug-in end. The body is internally provided with a pin installation hole. An optical fiber base pin is installed in the pin installation hole. The front side of the body, corresponding to the pin installation hole, is provided with a lens. The front end portion of the optical fiber base pin is positioned at the focus position of the lens. The invention also provides an optical fiber connector housing capable of reducing the optical density per unit area, and an optical fiber connector provided with the optical fiber connector housing.
Description
Technical field
The present invention relates to the joints of optical fibre housing in field of signal transmissions and the joints of optical fibre.
Background technology
In the rack of communication facilities, need to carry out data communication between backboard and daughter board, at present, use comparatively ripe communication mode to be adopt the transmission of high-speed-differential electric connector, this communication mode, due to the defect of electric signal transmission, has certain transmission limit.
And if the data communication between backboard and daughter board adopts Optical Fiber Transmission, in transmission capacity, the more existing electrical transmission of meeting is much higher, but the fiber junctions that Optical Fiber Transmission relates between daughter board with backboard is connected, because fiber core external diameter is in a μm level, in addition the characteristic of trimmed book body, the quality of docking contact end face is extremely responsive.In actual use, back panel connector is installed in rack in advance with backboard usually, daughter board is installed as required follow-up, because machine room is generally between non-clean area, easily introduce the booties such as dust on cabinet female connector, then easily cause end surface of optical fiber connector booty, and when product uses, normally air cooling way in cabinet, even if plug and socket are to after inserting, still has the necessity of carrying out dustproof design.
The existing this optical connector " backboard optical connector " disclosed in Chinese patent CN104412141A being provided with dustproof construction, a kind of plug and socket is disclosed in this patent document, the Socket casing of contact pin mounting hole is provided with in socket comprises, in contact pin mounting hole, optical fiber contact pins is installed, the front end of Socket casing is hinged with the dust excluding plate that hinge axes extends in left-right direction, plug comprises the plug casing with push pedal, at plug, during socket grafting, push pedal pushing tow the front face of dust excluding plate and dust excluding plate is rotated clockwise and digs, thus make the optical fiber contact pins in plug casing and the optical fiber contact pins in socket to inserting, two optical fiber contact pins are to slotting formation light path, at plug, after socket grafting terminates, make plug, socket is separated, dust excluding plate turns under relying on deadweight counterclockwise and capping Socket casing again, thus the optical fiber contact pins in guarantee Socket casing is in dustfree environment.Existing this dustproof construction Problems existing is: the engagement process of (1) push pedal and dust excluding plate as shown in Figure 1: push pedal 1 is with the pushing tow process of dust excluding plate 2, F1, F2, F3 represents that dust excluding plate is in rotation process respectively, push pedal is to the thrust direction of dust excluding plate, as seen from the figure, in dust excluding plate rotation process, the torque arm length of push pedal to the thrust of dust excluding plate is changing always, when push pedal is in vertical state, the arm of force is maximum, along with the rotation of dust excluding plate, the arm of force diminishes gradually, that is in order to realize dust excluding plate rotation, required thrust is increasing, this can increase plug on the one hand, the grafting difficulty of socket, on the other hand at plug, the socket grafting later stage, operating personnel must apply larger thrust could realize dust excluding plate rotation, this large thrust can increase the grafting speed of plug, plug and socket produce larger shock just can complete plug, the grafting process of socket, the serviceable life of plug can be reduced like this, in addition, after dust excluding plate is dug completely, dust excluding plate can not be hidden in push pedal, the size of plug can be increased like this, be unfavorable for that the miniaturization of plug makes, (2) even if there is the protection of dust excluding plate, still cannot ensure that optical fiber contact pins is in absolute dustfree environment, once the end face of optical fiber contact pins speckles with dust, and the light path radius that optical fiber contact pins is formed is smaller, the optical density of unit area is larger, light signal is very high to the susceptibility that dust is dirty, greatly unfavorable to the transmission of signal.
Summary of the invention
The object of the present invention is to provide a kind of joints of optical fibre housing reducing unit area optical density; The present invention also aims to provide a kind of joints of optical fibre using this joints of optical fibre housing.
In order to solve the problem, in the present invention, the technical scheme of joints of optical fibre housing is:
Joints of optical fibre housing, comprising front end is body to spigot, be provided with the contact pin mounting hole installed for corresponding optical fiber contact pins in body, body is provided with lens in the front side of corresponding contact pin mounting hole, and lens have the focus of the leading section being in corresponding optical fiber contact pins.
Described lens are lenticule.
Described lens scioptics erection is placed on described body, and lens mount and described body are wholely set or lens mount is installed on described body.
Joints of optical fibre housing also comprises the dust excluding plate that pivot center extends in left-right direction, described dust excluding plate is provided with the load axle with described pivot center eccentric setting, load axle has for being made by the pushing tow inclined-plane pushing tow in the push pedal on corresponding adapts optical connector the circular arc load-carrying surface that described dust excluding plate overturns along clockwise direction around hinge axes.
In the present invention, the technical scheme of the joints of optical fibre is:
The joints of optical fibre, comprise joints of optical fibre housing, it is body to spigot that joints of optical fibre housing comprises front end, contact pin mounting hole is provided with in body, in contact pin mounting hole, optical fiber contact pins is installed, body is provided with lens in the front side of corresponding contact pin mounting hole, and the front end of described optical fiber contact pins is in the focal position of described lens.
The focus of described lens is positioned on the rear end face of described lens, is provided with and applies to make to elastic acting force the leading section of described optical fiber contact pins hold out against the flexible member on the rear end face of described lens forward to described optical fiber contact pins in body.
Described lens are lenticule.
Described lens scioptics erection is placed on described body, and lens mount and described body are wholely set or lens mount is installed on described body.
Joints of optical fibre housing also comprises the dust excluding plate that pivot center extends in left-right direction, described dust excluding plate is provided with the load axle with described pivot center eccentric setting, load axle has for being made by the pushing tow inclined-plane pushing tow in the push pedal on corresponding adapts optical connector the circular arc load-carrying surface that described dust excluding plate overturns along clockwise direction around hinge axes.
Beneficial effect of the present invention is: at Optical fiber plug, fiber-optical socket is to time slotting, because the front end of plug fibers contact pin is in the focal position place of plug lens, the front end of socket optical fiber contact pins is in the focal position place of receptable lens, therefore light path is when plug fibers contact pin transmits to socket optical fiber contact pins, light path is first expanded by plug lens, being reduced by receptable lens subsequently finally transfers on socket optical fiber contact pins, that is the light path radius between plug fibers contact pin and socket optical fiber contact pins has been exaggerated, which reduce the optical density of unit area, reduce light signal to dirty susceptibility, be conducive to the transmission of signal.
Accompanying drawing explanation
Fig. 1 be in the present invention in prior art push pedal and dust excluding plate coordinate schematic diagram;
Using state figure when Fig. 2 is the non-grafting of Optical fiber plug in the present invention, socket;
Fig. 3 is the using state figure after Optical fiber plug in the present invention, socket grafting;
Fig. 4 is the structural representation of socket contact module in the present invention;
Fig. 5 is the exploded view of Fig. 4;
Fig. 6 be in Fig. 4 dust excluding plate and Socket casing coordinate schematic diagram;
Fig. 7 is structural representation when dust excluding plate is taken off by Socket casing in Fig. 6;
Fig. 8 is the structural representation in the present invention in socket assembling process;
Fig. 9 is the process schematic of push pedal pushing tow dust excluding plate in the present invention;
Figure 10 be in the present invention receptable lens coordinate with plug lens before structural representation;
Figure 11 be in the present invention receptable lens coordinate with plug lens after structural representation;
The schematic diagram that Figure 12 is receptable lens, plug lens on light bundle expands.
Embodiment
The embodiment of the joints of optical fibre is as described in Fig. 2 ~ 12: the joints of optical fibre in the present embodiment are fiber-optical socket 7, fiber-optical socket 7 is installed on when using on the backboard 5 of rack, figure middle term 4 represents the Optical fiber plug with fiber-optical socket 7 adaptation, is installed on the daughter board 3 of rack when Optical fiber plug uses.In the present embodiment, fiber-optical socket is a modular jack with at least two socket contact modules 6, Optical fiber plug is a modular plug with at least two Plug contact modules, Optical fiber plug comprises pin connector framework and four Plug contact modules, fiber-optical socket comprises socket connector framework 7 and four socket contact modules 6, socket contact module is identical with the fit structure of socket connector framework and Plug contact module and corresponding pin connector framework, now only the concrete structure of socket contact module 6 and socket connector framework 7 is described in detail, socket connector framework is used for socket contact module and installs and fix with backboard, socket connector framework 7 offers side by side four module mounting holes 21 extended along the longitudinal direction, the shape of module mounting hole is rectangle, a left side for module mounting hole, right side cell wall offers the guide key groove 23 extended along the longitudinal direction, the upside cell wall of module mounting hole 21 offers locking slot 25.Plug contact module comprises plug casing, each socket contact module includes joints of optical fibre housing, joints of optical fibre housing comprises Socket casing and is arranged at the body 16 installed for socket optical fiber contact pins in Socket casing, the left and right sides of Socket casing is provided with for being led the feather key 10 be slidably matched with guide key groove, the height of two feather keys 10 is different, the left and right sides of Socket casing is also provided with positive stop key bar 11, a left side for module mounting hole, right side cell wall offers the stopper slot 22 loaded for positive stop key bar, the locking that the rear end of Socket casing is provided with for coordinating with locking slot 25 links up with 12.During use, the Socket casing of socket contact module is encased in module mounting hole 21 by rear to front, the coordinating of guide key groove 23 and feather key 10 can realize identifying and lead, and the front end of stopper slot 22 has confined planes backwards, after contact element module moves forward and puts in place, the front end of positive stop key bar 11 just with confined planes block, such confined planes can Restricted Contact part module move the limit forward, now lock hook 12 and also can tangle locking slot 25, socket contact module can be limited by locking slot 25 move backwards with coordinating of locking hook 12, so just complete the installation of single socket contact module, the assembling process that each socket contact module can realize whole socket is installed successively, when using the object of assembling socket to be to occur damaging in single socket contact module, can local replacing, such as when one of them socket contact module damage, only the socket contact module of correspondence need be dismantled, during dismounting, pressing locking hook makes locking hook 12 deviate from by corresponding locking slot 25, directly to after pull out and socket contact module can be dismantled.Fig. 8 middle term 24 represents the slot to make way for getting out of the way load axle 19; Fig. 4 middle term 13 represents optical fiber.
The Socket casing of each socket contact module and the front end of body are to spigot, Socket casing comprises installation sleeve and tailstock, installation sleeve is square structure, the body 16 being provided with socket optical fiber contact pins is installed in installation sleeve, tailstock moves the limit backwards for limiting body, is provided with spring 15 between tailstock and body.Be provided with multiple socket optical fiber mounting hole in body, each socket optical fiber contact pins is arranged in respective socket optical fiber mounting hole respectively, installation sleeve is provided with tailstock hanging groove, and tailstock tailstock is provided with for coordinating with tailstock hanging groove links up with 14.Plug casing is provided with plug lens 32 in the front side of corresponding plug optical fiber contact pins mounting hole, and the front end of plug fibers contact pin is in the focal position of plug lens; Body is provided with receptable lens 18 in the front side of respective socket optical fiber contact pins mounting hole, and the front end of socket optical fiber contact pins is in the focal position of receptable lens.The lens mount 31 of receptable lens is installed on body, socket optical fiber contact pins 35 in each light path is held in the focal position of receptable lens by flexible member (not shown) and receptable lens close contact, plug fibers contact pin in plug casing is held in the focal position of plug lens by flexible member and plug lens close contact, in the present embodiment, plug lens and receptable lens are lenticule, each lenticule is array format arrangement, light beam can expand by the effect of scioptics, Figure 12 middle term 36 represents the light beam after expanding, after light beam expands, optical density in unit area reduces, the connecting end surface sensitivity dirty to dust is reduced with this, this can increase the dust-fast effect of this connector.
Socket casing front end is hinged with the dust excluding plate 8 that pivot center extends in left-right direction, dust excluding plate 8 is provided with two and is coaxially set with load axle 19, two load axles 19 of pivot center eccentric setting and lays respectively at the two ends, left and right of dust excluding plate 8.Plug comprises the plug casing with push pedal 4, push pedal is provided with pushing tow inclined-plane 26, and load axle 19 has for being made by pushing tow inclined-plane 26 pushing tow the circular arc load-carrying surface that dust excluding plate 8 overturns along clockwise direction around hinge axes.Be provided with between Socket casing and dust excluding plate and apply elastic acting force with the elastic component 9 making dust excluding plate have the trend of rotating counterclockwise towards dust excluding plate, elastic component 9 is arranged on Socket casing, dust excluding plate 8 is provided with the triangle pushing tow projection 20 corresponding with elastic component 9, triangle pushing tow projection has the arched top pushing surface for elastic component pushing tow.Dust excluding plate is provided with the O-ring seal 17 for being sealed and matched in described Socket casing of annular, O-ring seal 17 is fixedly attached on dust excluding plate 8.Push pedal is provided with and turn at dust excluding plate the holding tank 30 that horizontal level conceals for dust excluding plate, pushing tow inclined-plane 26 is positioned at the left and right sides of holding tank 30.The front end of plug casing is to spigot, is provided with the plug fibers mounting hole corresponding with socket optical fiber mounting hole in plug casing, is all provided with plug fibers contact pin in each plug fibers mounting hole.At plug, socket two connectors to time slotting, the circular arc load-carrying surface of the pushing tow inclined-plane pushing tow load axle in push pedal, because pushing tow inclined-plane and circular arc load-carrying surface remain tangent state, described push pedal crosses the center of circle of circular arc load-carrying surface all the time to the thrust that load axle applies, the arm of force of push pedal to the thrust that load axle applies is always the distance between the axis of pivot center and circular arc load-carrying surface, this arm of force size can not change, therefore can ensure the stationarity of plug, socket grafting process, contribute to the serviceable life ensureing connector.
In other embodiment of these joints of optical fibre: holding tank can not also be established; O-ring seal can also be fixed on dust excluding plate in sulfuration, or O-ring seal also can not be established; The number of load axle can also be one, three or other number; Triangle pushing tow projection can not also be established, and now elastic component can be a torsion spring, and certain elastic component can not also be established, and dust excluding plate can rely on deadweight realization to rotate counterclockwise; The lens mount of receptable lens also can with this body by integral forming; The flexible member realizing socket optical fiber contact pins and receptable lens close contact also can not be established, and now can be fixed on body by socket optical fiber contact pins, makes the end of contact pin contacting piece be positioned at the focal position of receptable lens; When fibre diameter is larger, the lens of normal size can be adopted to replace lenticule; Body and Socket casing can also be wholely set; Flexible member may also be spring or rubber etc.
The embodiment of joints of optical fibre housing is as shown in Fig. 2 ~ 12: the structure of joints of optical fibre housing is identical with the joints of optical fibre housing described in above-mentioned each joints of optical fibre embodiment, is not described in detail in this.
Claims (9)
1. joints of optical fibre housing, comprising front end is body to spigot, be provided with the contact pin mounting hole installed for corresponding optical fiber contact pins in body, it is characterized in that: body is provided with lens in the front side of corresponding contact pin mounting hole, and lens have the focus of the leading section being in corresponding optical fiber contact pins.
2. joints of optical fibre housing according to claim 1, is characterized in that: described lens are lenticule.
3. joints of optical fibre housing according to claim 1, is characterized in that: described lens scioptics erection is placed on described body, and lens mount and described body are wholely set or lens mount is installed on described body.
4. the joints of optical fibre housing according to claim 1 ~ 3 any one, it is characterized in that: joints of optical fibre housing also comprises the dust excluding plate that pivot center extends in left-right direction, described dust excluding plate is provided with the load axle with described pivot center eccentric setting, load axle has for being made by the pushing tow inclined-plane pushing tow in the push pedal on corresponding adapts optical connector the circular arc load-carrying surface that described dust excluding plate overturns along clockwise direction around hinge axes.
5. the joints of optical fibre, comprise joints of optical fibre housing, it is body to spigot that joints of optical fibre housing comprises front end, contact pin mounting hole is provided with in body, in contact pin mounting hole, optical fiber contact pins is installed, it is characterized in that: body is provided with lens in the front side of corresponding contact pin mounting hole, the front end of described optical fiber contact pins is in the focal position of described lens.
6. the joints of optical fibre according to claim 5, it is characterized in that: the focus of described lens is positioned on the rear end face of described lens, be provided with in body and apply to make to elastic acting force the leading section of described optical fiber contact pins hold out against the flexible member on the rear end face of described lens forward to described optical fiber contact pins.
7. the joints of optical fibre according to claim 5, is characterized in that: described lens are lenticule.
8. the joints of optical fibre according to claim 5, is characterized in that: described lens scioptics erection is placed on described body, and lens mount and described body are wholely set or lens mount is installed on described body.
9. the joints of optical fibre according to claim 5 ~ 8 any one, it is characterized in that: joints of optical fibre housing also comprises the dust excluding plate that pivot center extends in left-right direction, described dust excluding plate is provided with the load axle with described pivot center eccentric setting, load axle has for being made by the pushing tow inclined-plane pushing tow in the push pedal on corresponding adapts optical connector the circular arc load-carrying surface that described dust excluding plate overturns along clockwise direction around hinge axes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510214763.0A CN105044851B (en) | 2015-04-30 | 2015-04-30 | Joints of optical fibre housing and the joints of optical fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510214763.0A CN105044851B (en) | 2015-04-30 | 2015-04-30 | Joints of optical fibre housing and the joints of optical fibre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105044851A true CN105044851A (en) | 2015-11-11 |
| CN105044851B CN105044851B (en) | 2018-01-16 |
Family
ID=54451516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510214763.0A Expired - Fee Related CN105044851B (en) | 2015-04-30 | 2015-04-30 | Joints of optical fibre housing and the joints of optical fibre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105044851B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870772A (en) * | 2017-12-01 | 2019-06-11 | 福州高意通讯有限公司 | A kind of optical fiber connector that can be plugged for a long time |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5348487A (en) * | 1992-05-20 | 1994-09-20 | Diamond Sa | Plug connector for optical fibers |
| KR20020069124A (en) * | 2001-02-23 | 2002-08-29 | 호시덴 가부시기가이샤 | Optical connector having shutter |
| CN1402838A (en) * | 1999-11-03 | 2003-03-12 | 惠特克公司 | Optoelectric module for multi-fiber arrays |
| WO2006105896A1 (en) * | 2005-04-05 | 2006-10-12 | Rosenberger Hochfrequenztechnik Gmbh & Co. Kg | Optical data transmission cable plug connection with fakra housing |
| CN101852897A (en) * | 2008-10-29 | 2010-10-06 | 泰科电子公司 | Single-channel expanded beam connector |
| CN201845099U (en) * | 2010-08-25 | 2011-05-25 | 河北四方通信设备有限公司 | E2000 type optical fiber connector |
| TW201400899A (en) * | 2012-06-01 | 2014-01-01 | Tyco Electronics Corp | Expanded-beam connector with molded lens |
| CN104412141A (en) * | 2012-06-26 | 2015-03-11 | 日本航空电子工业株式会社 | Optical connector for backplane |
-
2015
- 2015-04-30 CN CN201510214763.0A patent/CN105044851B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5348487A (en) * | 1992-05-20 | 1994-09-20 | Diamond Sa | Plug connector for optical fibers |
| CN1402838A (en) * | 1999-11-03 | 2003-03-12 | 惠特克公司 | Optoelectric module for multi-fiber arrays |
| KR20020069124A (en) * | 2001-02-23 | 2002-08-29 | 호시덴 가부시기가이샤 | Optical connector having shutter |
| WO2006105896A1 (en) * | 2005-04-05 | 2006-10-12 | Rosenberger Hochfrequenztechnik Gmbh & Co. Kg | Optical data transmission cable plug connection with fakra housing |
| CN101852897A (en) * | 2008-10-29 | 2010-10-06 | 泰科电子公司 | Single-channel expanded beam connector |
| CN201845099U (en) * | 2010-08-25 | 2011-05-25 | 河北四方通信设备有限公司 | E2000 type optical fiber connector |
| TW201400899A (en) * | 2012-06-01 | 2014-01-01 | Tyco Electronics Corp | Expanded-beam connector with molded lens |
| CN104412141A (en) * | 2012-06-26 | 2015-03-11 | 日本航空电子工业株式会社 | Optical connector for backplane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870772A (en) * | 2017-12-01 | 2019-06-11 | 福州高意通讯有限公司 | A kind of optical fiber connector that can be plugged for a long time |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105044851B (en) | 2018-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105024219A (en) | Connector shell body, and connector and connector assembly using same | |
| US9823424B2 (en) | Ferrule assembly for a fiber optic connector | |
| US9244228B2 (en) | Female optical connector | |
| US20130343698A1 (en) | Ir reflowable optical transceiver | |
| CN203414631U (en) | Electronic tag installation device and optical fiber connector employing electronic tag installation device | |
| CN105044852A (en) | Contact module housing, contact module and optical fiber connector | |
| CN105044851A (en) | Optical fiber connector housing and optical fiber connector | |
| CN105022123A (en) | Optical fiber connector assembly | |
| CN105161905B (en) | The dust-proof mechanism of socket | |
| CN205263354U (en) | Compatible formula high -density connector of multicore | |
| US8568040B2 (en) | Optical fiber connector having strengthening unit | |
| US9389371B2 (en) | Fiber optic connectors and interfaces for fiber optic connectivity through device display surface, and related components, systems and methods | |
| US11372173B2 (en) | Optical connector | |
| CN205263359U (en) | MPO optic fibre socket | |
| CN102393551B (en) | Anti-misplug LC plug and LC connector assembly comprising same | |
| CN204595263U (en) | The joints of optical fibre | |
| CN2674471Y (en) | Optical fiber connector | |
| US8408812B2 (en) | Optical fiber connector with rotatable cover and optical fiber connector assembly having same | |
| CN205427242U (en) | Optical fiber connector | |
| CN104993293B (en) | Equipment cabinet | |
| CN2548168Y (en) | Optical fiber connector | |
| US9423577B2 (en) | Optical receptacles having compliance support interface for facilitating alignment with fiber optic connectors during insertion, and related components, systems, and methods | |
| CN219225148U (en) | A shell structure for optical module | |
| CN211669462U (en) | Glasses and glasses case | |
| CN207663104U (en) | A kind of novel SFP module trippers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 Termination date: 20190430 |