CN102842764B - Device for adjusting downdip angle of communication antenna - Google Patents
Device for adjusting downdip angle of communication antenna Download PDFInfo
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- CN102842764B CN102842764B CN201210330619.XA CN201210330619A CN102842764B CN 102842764 B CN102842764 B CN 102842764B CN 201210330619 A CN201210330619 A CN 201210330619A CN 102842764 B CN102842764 B CN 102842764B
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- driving shaft
- drive link
- hemizonid
- driver element
- securing member
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- 238000004891 communication Methods 0.000 title claims abstract description 42
- 230000003068 static effect Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010338 mechanical breakdown Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The embodiment of the invention discloses a device for adjusting a downdip angle of a communication antenna. The device comprises an electronic downdip angle control unit, a driving unit, a driving shaft and a limiting mechanism. The driving unit is provided with a control input terminal and a power output terminal, wherein the control input terminal is connected with the electronic downdip angle control unit, and the power output terminal is coupled with the driving shaft. One end of the driving shaft is coupled with a power output terminal of the driving unit and driven by the driving unit to move in an axial direction, so as to adjust the downdip angle of the communication antenna. The limiting mechanism mechanically blocks the driving shaft, so that the driving shaft can move within a pre-determined range. The device disclosed by the embodiment of the invention can effectively control the adjustment accuracy of the downdip angle of the communication antenna.
Description
Technical field
The present invention relates to communication antenna technical field, specifically relate to a kind of device regulating communication antenna tilt angled down.
Background technology
In mobile communication system, for realizing the coverage optimization to Serving cell wireless signal, and for suppressing co-frequency cell mutually to produce co-channel interference, needing the tilt angled down of reasonably adjustment base station communication antenna, antennas orthogonal directional pattern is had a down dip.The tilt angled down of antenna determines the overlay area of antenna beam ripple.
In prior art, regulate the mode of tilted angle of antenna to be control drive system to make drive rod rotation, the drive block on drive link moves axially, and regulates communication antenna tilt angled down by the movement of drive block.But, this regulative mode does not consider the stability of drive system, when there is mechanical tolerance even mechanical breakdown or drive link produce mechanical deformation in drive system, may deviation be there is in the movement of drive block, the tilt angled down of practical adjustments is caused to occur deviation, with require that the tilt angled down regulated is inconsistent, thus cause the degree of regulation of tilt angled down to occur deviation.
Summary of the invention
The technical problem that embodiment of the present invention mainly solves is: provide a kind of device regulating communication antenna tilt angled down, effectively can control the degree of regulation of communication antenna tilt angled down, and controls simple, easy to operate.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of device regulating communication antenna tilt angled down, this device comprises electric slope angle control unit, driver element, driving shaft, position-limit mechanism, drive link, drive block and angle scale.Driver element has control input end and clutch end, and control input end connects electric slope angle control unit, and clutch end couples driving shaft.One end of driving shaft couples the clutch end of driver element, moves axially under the driving of driver element, to regulate communication antenna tilt angled down.Position-limit mechanism mechanical stop driving shaft makes it move in preset range; The surface of described drive link is threaded, described drive block is provided with screwed hole, described drive link is arranged in screwed hole, one end of described drive link connects the clutch end of speed changer, and original place is rotated under the driving of described driver element, described drive block is fixed in one end of described driving shaft, moving axially along drive link when described drive block rotates in drive link original place; Described angle scale comprises fixed ruler and is located at the adjustable rule on fixed ruler, and described adjustable rule is fixed on driving shaft, and described fixed ruler maintains static.
The device of the adjustment communication antenna tilt angled down of embodiment of the present invention is by arranging position-limit mechanism, the position-limit mechanism mechanical stop driving shaft when driving shaft moves axially, driving shaft is moved in preset range, prevent the displacement of driving shaft from exceeding preset range, effectively can control the degree of regulation of communication antenna tilt angled down, and control simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention regulates device first execution mode of communication antenna tilt angled down;
Fig. 2 is the structural representation that the present invention regulates device second execution mode of communication antenna tilt angled down;
Fig. 3 is the part-structure enlarged diagram of the drive link of the device shown in Fig. 2;
Fig. 4 is the structural representation that the present invention regulates device the 3rd execution mode of communication antenna tilt angled down;
Fig. 5 is the structural representation of the securing member of the device shown in Fig. 4.
Embodiment
Below in conjunction with drawings and embodiments, the present invention is described in further detail.It is emphasized that; following execution mode is only for illustration of the present invention; but do not limit scope of the present invention, those of ordinary skill in the art, not making other execution modes all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, Fig. 1 is the structural representation that the present invention regulates device first execution mode of communication antenna tilt angled down.This device comprises electric slope angle control unit 110, driver element 120, driving shaft 130 and position-limit mechanism 140.
Electric slope angle control unit 110 is provided with power connection and AISG joint (Antenna Interface Standards Group, Antenna Interface Standards Group) (figure does not all show), power connection is for connecting power supply, and AISG joint is for connecting External cable.
Driver element 120 has control input end 121 and clutch end 122.Control input end 121 connects electric slope angle control unit 110, and for receiving the control signal that electric slope angle control unit 110 sends, clutch end 122 couples driving shaft 130, for according to control signal outputting power square.
One end of driving shaft 130 couples the clutch end 122 of driver element 120, moves axially under the driving of driver element 120, to regulate communication antenna tilt angled down.That is, clutch end 122 makes driving shaft 130 axially move at self, and according to the control of electric slope angle control unit 110, driving shaft 130 can move back and forth.In the present embodiment, clutch end 122 can be gear, the surface of driving shaft 130 with driving cog, driving cog and gears meshing, thus the reciprocating linear circular motion of gear being changed into driving shaft 130 moves.Certainly, those skilled in the art can adopt other known ways that driving shaft 130 will be made to move axially.
Position-limit mechanism 140 mechanical stop driving shaft 130 makes driving shaft 130 move in preset range.Preset range refers to, when setting the degree of regulation of communication antenna tilt angled down, the corresponding degree of regulation of driving shaft 130 should the scope of movement.In the present embodiment, position-limit mechanism 140 comprises securing member 141 and locating part 142.Securing member 141 is fixed on driving shaft 130, and the contiguous driving shaft 130 of locating part 142 is arranged, and locating part 142 mechanical stop securing member 141, i.e. mechanical stop driving shaft 130, makes driving shaft 130 move axially in preset range.
In the present embodiment, securing member 141 is one, locating part 142 is two, securing member 141 is between two locating parts 142, the degree of regulation of the corresponding communication antenna tilt angled down of distance of two locating parts 142, the i.e. upper limit of a corresponding degree of regulation of locating part 142, the lower limit of the corresponding degree of regulation of another locating part 142.In other embodiments, securing member 141 is two, and locating part 142 is one, locating part 142 between two securing members 141, the degree of regulation of the corresponding communication antenna tilt angled down of the distance of two securing members 141.When securing member 141 and locating part 142 are one, can make driving shaft 130 on the moving direction of turning left or turning right, have a restriction, this situation also belongs to " preset range " described in embodiment of the present invention.
The other end of driving shaft 130 connects tilt angled down module 150, the distance of driving shaft 130 movement is directly changed into the regulated quantity of tilt angled down by tilt angled down module 150, such as tilt angled down module 150 is the phase shifter of communication antenna, after driving shaft 130 moves, the phase change of phase shifter, thus communication antenna tilt angled down changes.In addition, tilt angled down module 150 can also be antenna oscillator, and the phase place changing antenna oscillator also can change communication antenna tilt angled down.
The device of the adjustment communication antenna tilt angled down of embodiment of the present invention arranges securing member 141 on driving shaft 130, contiguous driving shaft 130 arranges locating part 142, by locating part 142 mechanical stop securing member 141, driving shaft 130 can move back and forth in preset range, when occurring abnormal conditions, such as driving shaft produce mechanical deformation or due to mechanical breakdown cause driver element 120 outputting power square produce deviation time, position-limit mechanism 140 all will make driving shaft 130 stop by force when driving shaft 130 exceedes preset range mobile, prevent the displacement of driving shaft 130 from exceeding preset range, effectively can control the degree of regulation of communication antenna tilt angled down.
In addition, the position of position-limit mechanism 140 can regulate arbitrarily according to the required precision of tilt angled down, can be widely used in various types of communication antenna.And be easier to according to required precision the preset range obtaining driving shaft 130 movement, the operation adjusting the position of position-limit mechanism 140 according to preset range is fairly simple, convenient.Therefore, the device of present embodiment has control simply, easy to operate effect.
Refer to Fig. 2, Fig. 2 is the structural representation that the present invention regulates device second execution mode of communication antenna tilt angled down.This device comprises the phase shifter 260 of electric slope angle control unit 210, driver element 220, driving shaft 230, position-limit mechanism 240, drive link 241, drive block 242, angle scale 250 and communication antenna.The convenience considered actual use, debugging and transport, the phase shifter 260 of electric slope angle control unit 210, driver element 220, driving shaft 230, position-limit mechanism 240, drive link 241, drive block 242, angle scale 250, communication antenna is all integrated in casing 300.
Electric slope angle control unit 210 comprises power connection 211 and AISG joint 212, and power connection 211 and AISG joint 212 all stretch out in the cap of casing 300.In the present embodiment, electric slope angle control unit 210 is PLC (Programmable Logic Controller, programmable logic controller (PLC)).
Driver element 220 has control input end 2211 and clutch end 2221, and control input end 2211 connects electric slope angle control unit 210, and clutch end 2221 couples driving shaft 230.One end of driving shaft 230 couples the clutch end 2221 of driver element 220, and the other end of driving shaft 230 connects phase shifter 260, moves axially, to regulate communication antenna tilt angled down under the driving of driver element 220.Position-limit mechanism 240 mechanical stop driving shaft 230 makes it move in preset range.
Particularly, driver element 220 comprises motor 221 and speed changer 222, motor 221 is connected with speed changer 222, the control input end of motor 221 connects electric slope angle control unit 210 as the control input end 2211 of driver element 220, and the clutch end of speed changer 222 couples driving shaft 230 as the clutch end 2221 of driver element 220.In the present embodiment, speed changer 222 is planetary transmission.Because motor 221 rotating speed is high, moment of torsion is little, therefore, speed changer 222 is connected with motor 221, forms the output of the slow-speed of revolution, high pulling torque.
Further again, the surface of drive link 241 is threaded, and drive block 242 is provided with screwed hole, and drive link 241 is arranged in screwed hole.One end of drive link 241 connects the clutch end 2221 of speed changer 222, the other end of drive link 241 is located on the cap of casing 300, drive link 241 original place under the driving of driver element 220 is rotated, drive block 242 is fixed in one end of driving shaft 230, the other end of driving shaft 230 connects phase shifter 260, moving axially along drive link 241 when drive block 242 rotates in drive link 241 original place, driving shaft 230 is also along with drive block 242 moves axially.
Position-limit mechanism 240 comprises two securing members 243, two securing members 243 are fixed on drive link 241, drive block 242 between two securing members 243, securing member 243 mechanical stop drive block 242, i.e. mechanical stop driving shaft 230, makes driving shaft 230 move axially in preset range.The degree of regulation of the corresponding communication antenna tilt angled down of the distance between two securing members 243, i.e. the upper limit of a corresponding degree of regulation of securing member 243, the lower limit of the corresponding degree of regulation of another securing member 243.In the present embodiment, the scope of degree of regulation is-1 ~+1 degree.
Angle scale 250 comprises fixed ruler 251 and adjustable rule 252, and adjustable rule 252 is located on fixed ruler 251, and adjustable rule 252 is fixed on driving shaft 230, and fixed ruler 251 maintains static.In the present embodiment, fixed ruler 251 is fixed on the cap of casing 300.When driving shaft 230 moves axially, adjustable rule 252 relatively fixed ruler 251 slides, thus angle scale 250 produces reading.Reading on angle scale 250 reflects the regulated quantity of tilt angled down, and the distance of amplitude of accommodation respective drive 230 movement of tilt angled down, can handled easily personnel calibrate.In addition, angle scale 250 can also arrange transducer, the reading of angle scale 250 is sent to the operating personnel carrying out remote control by transducer, and handled easily personnel grasp adjustment situation.Further, the regulated quantity of tilt angled down is also fed back to the operating personnel carrying out remote control by electric slope angle control unit 210, corresponding with the reading of angle scale 250, monitor the state of electric slope angle control unit 210 while handled easily personnel grasp adjustment situation, thus can overhaul in time.
In the present embodiment, motor 221 is a part for driver element 220.In other embodiments, driver element 220 can only include speed changer 222, uses as transmission mechanism, and electric slope angle control unit 210 inside is located at by motor 221, is a part for electric slope angle control unit 210.
Also be provided with fixed support 310 in casing 300, fixed support 310 is through driver element 220, and two ends are individually fixed on the sidewall of casing 300.Driver element 220 is fixed on fixed support.
Drive link 241 is arranged in drive block 242 by the device of present embodiment, drive link 241 is fixed with two securing members 243, two securing members 243 are separated by preset range, after electric slope angle control unit 210 sends conditioning signal, motor 221 drive speed transmission 222 output torque of driver element 220, thus drive drive link 241 to rotate, when drive link 241 rotates, drive block 242 and driving shaft 230 move axially, after driving shaft 230 moves preset distance, speed changer 222 quits work voluntarily, motor 221 is later than speed changer 222 and quits work, but securing member 243 mechanical stop drive block 242, drive block 242 is made to stop by force mobile, 221, motor dallies, thus effectively control the degree of regulation of communication antenna tilt angled down.
See also Fig. 2 and Fig. 3, Fig. 3 is the part-structure enlarged diagram of the drive link of the device shown in Fig. 2.
The surface of drive link 241 is threaded 2411.Be provided with cross section 2412 vertically on the surface of drive link 241, cross section 2412 is shaped by the mode such as milling, filing.Cross section 2412 is marked with scale 2413, and scale 2413 can be coating, also can be that engraving is formed.
When securing member 243 is fixed on drive link 241, securing member 243 accurately can be fixed according to scale 2413.After the degree of regulation of tilt angled down is determined, preset range is also corresponding to be determined.When mounting fastener 243, accurately measure the distance between two securing members 243 by scale 2413, can ensure that preset range does not occur deviation, thus the degree of regulation of tilt angled down there will not be deviation.
On the other hand, after using this device for a long time, drive link 241 is owing to often needing to rotate, therefore, also may there is small displacement in himself, and securing member 243 is fixed on drive link 241, and this displacement will have influence on the up/down limit of the scope of tilt angled down degree of regulation.When initial installation drive link 241, the scale 2413 of drive link 241 relative to object of reference place can be recorded, after displacement appears in drive link 241, easily drive link 241 can be adjusted go back to the position corresponding to scale 2413 during initial installation.
Consider that drive link 241 can rotate, side that can be relative in cross section 2412 also arranges a cross section, thus can see scale in the two directions.
Refer to Fig. 4, Fig. 4 is the structural representation that the present invention regulates device the 3rd execution mode of communication antenna tilt angled down.
The device of present embodiment, based on the device of the second execution mode, changes position-limit mechanism 240 with position-limit mechanism 340 on this basis.Position-limit mechanism 340 comprises securing member 343 and locating part 344, and securing member 343 is fixed on driving shaft 230, and the contiguous driving shaft 230 of locating part 344 is arranged.When drive link 241 rotates, drive block 242 drives driving shaft 230 to move axially, locating part 344 mechanical stop securing members 343, thus driving shaft 230 is moved axially in preset range.In the present embodiment, securing member 343 is two, and locating part 344 is between two securing members 343.
Driving shaft 230 can arrange cross section on its surface, at cross section indexing.Its specific implementation is identical with the drive link 241 in Fig. 3, so place repeats no more.
In the present embodiment, locating part 344 is fixed on fixed support 310.In other embodiments, locating part 344 can be fixed on other positions in casing 300.See also Fig. 4 and Fig. 5, Fig. 5 is the structural representation of the securing member of the device shown in Fig. 4.Securing member 343 can be used for replacing the securing member 141 in the device shown in Fig. 1 and the securing member 243 in the device shown in Fig. 2.
Securing member 343 comprises the first hemizonid 3431 and the second hemizonid 3432, first hemizonid 3431 and the involutory connection of the second hemizonid 3432 and holds drive link 242 or driving shaft 230 tightly.
Two end faces of the first hemizonid 3431 run through and is provided with the first screw 3433, also corresponding running through is provided with the second screw 3434 to two end faces of the second hemizonid 3432, and screw 3435 passes the second screw 3434, first screw 3433 by the first hemizonid 3431 and the involutory connection of the second hemizonid 3432.In the present embodiment, the material of the first hemizonid 3431 and the second hemizonid 3432 is plastic cement.In other embodiments, the material of the first hemizonid 3431 and the second hemizonid 3432 is metal.
In the present embodiment, the first screw 3433 is located at two end faces of the first hemizonid 3431, and the second screw 3434 is located at two end faces of the second hemizonid 3432.In other embodiments, the two ends of the first hemizonid 3431 and the two ends of the second hemizonid 3432 form protuberance respectively to extension, screw 3435 passes the protuberance of the first hemizonid 3431 and the second hemizonid 3432, by the first hemizonid 3431 and the involutory connection of the second hemizonid 3432.
Communication antenna has reflector, and the device of embodiment of the present invention can be installed on the side of reflector, or the both sides of reflector are all symmetrically installed with this device, thus when this device regulates, the corresponding change of communication antenna tilt angled down.
By the way, the device of the adjustment communication antenna tilt angled down of embodiment of the present invention is by arranging position-limit mechanism, the position-limit mechanism mechanical stop driving shaft when driving shaft moves axially, driving shaft is moved in preset range, prevent the displacement of driving shaft from exceeding preset range, effectively can control the degree of regulation of communication antenna tilt angled down, and control simple, easy to operate.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. regulate a device for communication antenna tilt angled down, it is characterized in that, described device comprises electric slope angle control unit, driver element, driving shaft, position-limit mechanism, drive link, drive block and angle scale, wherein:
Described driver element has control input end and clutch end, and described control input end connects electric slope angle control unit, and described clutch end couples driving shaft;
One end of described driving shaft couples the clutch end of described driver element, moves axially under the driving of driver element, to regulate communication antenna tilt angled down;
Described position-limit mechanism mechanical stop driving shaft makes it move in preset range;
The surface of described drive link is threaded, described drive block is provided with screwed hole, described drive link is arranged in screwed hole, one end of described drive link connects the clutch end of speed changer, and original place is rotated under the driving of described driver element, described drive block is fixed in one end of described driving shaft, moving axially along drive link when described drive block rotates in drive link original place;
Described angle scale comprises fixed ruler and is located at the adjustable rule on fixed ruler, and described adjustable rule is fixed on driving shaft, and described fixed ruler maintains static.
2. device according to claim 1, it is characterized in that, described driver element comprises motor and speed changer, described motor is connected with speed changer, the control input end of described motor connects electric slope angle control unit as the control input end of driver element, and the clutch end of described speed changer couples driving shaft as the clutch end of driver element.
3. device according to claim 1, is characterized in that, described position-limit mechanism comprises securing member and locating part, described securing member is fixed on driving shaft, the contiguous described driving shaft of described locating part is arranged, and described locating part mechanical stop securing member, makes described driving shaft move axially in preset range.
4. device according to claim 3, is characterized in that, described securing member is two, and described locating part is between two securing members.
5. device according to claim 3, is characterized in that, described locating part is two, and described securing member is between two locating parts.
6. device according to claim 1, is characterized in that, described position-limit mechanism comprises two securing members, two described securing members are fixed on drive link, described drive block is between two securing members, and described securing member mechanical stop drive block, makes described driving shaft move axially in preset range.
7. device according to claim 6, is characterized in that, the surface of described drive link is provided with cross section vertically, and described cross section is marked with scale.
8. the device according to claim 3 or 7, is characterized in that, described securing member comprises the first hemizonid and the second hemizonid, and described first hemizonid and the involutory connection of the second hemizonid also hold drive link or driving shaft tightly.
9. device according to claim 8, it is characterized in that, two end faces of described first hemizonid run through and is provided with the first screw, also corresponding running through is provided with the second screw to two end faces of described second hemizonid, and screw passes the first screw, the second screw by the first hemizonid and the involutory connection of the second hemizonid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210330619.XA CN102842764B (en) | 2012-09-07 | 2012-09-07 | Device for adjusting downdip angle of communication antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210330619.XA CN102842764B (en) | 2012-09-07 | 2012-09-07 | Device for adjusting downdip angle of communication antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102842764A CN102842764A (en) | 2012-12-26 |
| CN102842764B true CN102842764B (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210330619.XA Expired - Fee Related CN102842764B (en) | 2012-09-07 | 2012-09-07 | Device for adjusting downdip angle of communication antenna |
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| CN (1) | CN102842764B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129715B (en) * | 2015-12-31 | 2021-12-10 | 华为技术有限公司 | Antenna comprising beam forming means |
| CN106207464B (en) * | 2016-06-24 | 2019-04-23 | 广东博纬通信科技有限公司 | A kind of modularization antenna phase displacement-type regulating device |
| EP4508719A1 (en) * | 2022-06-30 | 2025-02-19 | Outdoor Wireless Networks LLC | Base station antennas having metal tuning elements that move in response to changes in a remote electronic tilt setting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478451U (en) * | 2009-08-05 | 2010-05-19 | 宁波天韵天线科技有限公司 | Electronic-tuning antenna control device |
| CN202134656U (en) * | 2011-07-07 | 2012-02-01 | 广州桑瑞通信设备有限公司 | Antenna azimuth rotation apparatus |
| CN202888406U (en) * | 2012-09-07 | 2013-04-17 | 苏州市大富通信技术有限公司 | Apparatus for adjusting declination angle of communication antenna |
-
2012
- 2012-09-07 CN CN201210330619.XA patent/CN102842764B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478451U (en) * | 2009-08-05 | 2010-05-19 | 宁波天韵天线科技有限公司 | Electronic-tuning antenna control device |
| CN202134656U (en) * | 2011-07-07 | 2012-02-01 | 广州桑瑞通信设备有限公司 | Antenna azimuth rotation apparatus |
| CN202888406U (en) * | 2012-09-07 | 2013-04-17 | 苏州市大富通信技术有限公司 | Apparatus for adjusting declination angle of communication antenna |
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| CN102842764A (en) | 2012-12-26 |
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Effective date of registration: 20180801 Address after: 233400 Huaiyuan County Economic Development Zone, Bengbu, Anhui Patentee after: Anhui Dafu Electromechanical Technology Co., Ltd. Address before: 215000 33 Torch Road, hi tech Zone, Suzhou, Jiangsu Patentee before: Suzhou Tatfook Communication Technology Co., Ltd. |
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Granted publication date: 20141217 Termination date: 20180907 |