CN109854890B - Signal tower - Google Patents
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- CN109854890B CN109854890B CN201811636990.2A CN201811636990A CN109854890B CN 109854890 B CN109854890 B CN 109854890B CN 201811636990 A CN201811636990 A CN 201811636990A CN 109854890 B CN109854890 B CN 109854890B
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- 230000033001 locomotion Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 36
- 239000002131 composite material Substances 0.000 claims 2
- 230000011664 signaling Effects 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 8
- 238000004891 communication Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
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- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The invention discloses a signal tower. The three-axis tripod head mechanism and the rotatable support system can rotate around the same mandrel independently; the three-axis tripod head mechanism is characterized in that a connecting disc is arranged on the three-axis tripod head mechanism, the connecting disc can generate compound motion formed by rotating around a rotating shaft of the connecting disc and rotating around a mandrel under the action of power, the rotatable support system comprises at least one rotatable support, an antenna swing arm is arranged on the rotatable support, and the antenna swing arm can generate compound motion formed by rotating around the rotating shaft of the connecting disc and rotating around the mandrel under the action of power. The signal receiving or transmitting device mounted on each connecting disc and each antenna swing arm can have wider coverage range, and meanwhile, the invention can be used for mounting the standby signal transmitting or receiving device, and when one signal transmitting or receiving device fails, other normal devices are rotated to the position to continue working.
Description
Technical Field
The invention relates to the technical field of signals, in particular to a signal tower.
Background
With the development of communication industry, the coverage area of communication signals is wider and wider, however, at present, some places are still without communication signals or the communication signals are very weak, and the mobile communication vehicle which is present is equivalent to a mobile base station, and can fill the places without communication signals or the places with very weak signals with communication signals so as to ensure normal communication. Such mobile base stations are typically equipped with a signal tower on top, which functions to support various signal transmitting devices or various signal receiving devices. However, the existing signal towers have the problem that the coverage of the signal transmitting device or various signal receiving devices is not wide due to unreasonable structures, and the existing signal towers also have the problem that the number of the signal transmitting devices or the signal receiving devices mounted on the existing signal towers is small, so that the normal operation of the mobile base station is affected when a certain signal device fails.
Disclosure of Invention
The invention aims to solve the problems of the prior art that the coverage of signal transmission or signal reception is not wide and the signal transmission or receiving device carried by a signal tower is not enough, and provides the signal tower. In order to achieve the above object, the present invention provides the following technical solutions:
A signal tower, comprising a triaxial holder mechanism and a rotatable support system, wherein the triaxial holder mechanism and the rotatable support system can independently rotate around the same mandrel respectively; the three-axis tripod head mechanism is characterized in that a connecting disc is arranged on the three-axis tripod head mechanism, the connecting disc can generate compound motion formed by rotating around a rotating shaft of the connecting disc and rotating around a mandrel under the action of power, the rotatable support system comprises at least one rotatable support, an antenna swing arm is arranged on the rotatable support, and the antenna swing arm can generate compound motion formed by rotating around the rotating shaft of the connecting disc and rotating around the mandrel under the action of power.
The invention has the following effects: because the connecting disc and the antenna swing arms are in large-range compound movement, the signal receiving or transmitting device carried on each connecting disc and each antenna swing arm can have wider coverage range, and meanwhile, the invention can be provided with a plurality of antenna swing arms or connecting discs which meet the requirement, and can be used for carrying standby signal transmitting or receiving devices, and when a certain signal transmitting or receiving device fails, other normal devices are rotated to the position.
Further, the rotatable support system comprises three rotatable supports which are uniformly distributed in the circumferential direction. The produced effects are as follows: the device can be provided with a standby signal transmitting or receiving device, and when one signal transmitting or receiving device fails, the other normal devices can be rotated to the position to continue to work.
Further, the triaxial tripod head mechanism comprises a box body, a first motor, a first pitching shaft, a second motor, a second pitching shaft, a third motor and a mandrel; the first motor is fixed on the box, a first worm is arranged on an output shaft of the first motor, a first pitching shaft is erected on two walls of the box in a rotatable mode, a first turbine arranged on the first pitching shaft is matched with the first worm in a transmission mode, connecting discs are arranged at two ends of the first pitching shaft, and the connecting discs are located outside the box. The produced effects are as follows: when the first motor runs under the control of the control circuit, the first turbine and the first worm are driven to rotate by the transmission fit, the connecting disc rotates along with the first pitching shaft, and the signal receiving device or the signal transmitting device fixed on the connecting disc also rotates along with the first pitching shaft.
The second motor is fixed on the box, a second worm is arranged on an output shaft of the second motor, a second pitching shaft is erected on two walls of the box in a rotatable mode, a second turbine arranged on the second pitching shaft is matched with the second worm in a transmission mode, connecting discs are arranged at two ends of the second pitching shaft, and the connecting discs are located outside the box. The produced effects are as follows: when the second motor runs under the control of the control circuit, the second turbine and the second worm are driven to rotate by the transmission fit, the connecting disc rotates along with the second pitching shaft, and the signal receiving device or the signal transmitting device fixed on the connecting disc also rotates along with the second pitching shaft.
The dabber passes the bottom of box and is connected with the bottom of box, and the box can rotate around the dabber, and the third motor is fixed on the box, has arranged the third worm on the output shaft of third motor, and the dabber is fixed with the third turbine, transmission cooperation between third worm and the third turbine. The produced effects are as follows: when the third motor runs under the control of the control circuit, the spindle is fixed on the car body again due to the transmission cooperation of the third turbine and the third worm, and the box body can rotate around the spindle.
The final effect of the technical scheme is as follows: the signal transmitting devices or the signal receiving devices arranged on the four connecting discs can realize the compound movement of rotating around the mandrel and rotating around the first pitching axis or the second pitching axis under the control of a circuit, so that the signal transmitting devices or the signal receiving devices can face all angles.
Further, both ends of the first worm are rotatably supported on a first bracket, and the first bracket is fixed at the bottom of the box body. The rigidity of the first worm can be enhanced by supporting the two ends of the first worm, so that the transmission is more stable, and the vibration and noise generated in the transmission are reduced. Both ends of the second worm are rotatably supported on a second bracket, and the second bracket is fixed at the bottom of the box body. The rigidity of the second worm can be enhanced by supporting the two ends of the second worm, so that the transmission is more stable, and the vibration and noise generated in the transmission are reduced. Both ends of the third worm are rotatably supported on a third bracket, and the third bracket is fixed at the bottom of the box body. The rigidity of the third worm can be enhanced by supporting the two ends of the third worm, so that the transmission is more stable, and the vibration and noise generated in the transmission are reduced. The two ends of the first pitching shaft are erected on the two walls of the box body through bearings, and the two ends of the second pitching shaft are erected on the two walls of the box body through bearings.
Further, the rotatable mount system comprises a rotating plate and the rotatable mount, the rotatable mount being arranged on the rotating plate.
Further, rotatable support, including antenna swing arm, horizontal rotary mechanism and up-and-down swing mechanism, horizontal rotary mechanism drives the antenna swing arm and rotates in the horizontal plane, up-and-down swing mechanism drives the antenna swing arm and do the up-and-down swing to the realization is arranged the antenna on the antenna swing arm and can swing up-and-down and horizontal rotary motion, so that the antenna can cover different regions as required.
Still further, up-and-down swing mechanism includes fourth motor and swing drive mechanism, and fourth motor provides power, swing drive mechanism is responsible for converting the output of motor into the up-and-down swing of antenna swing arm.
Still further, the swing transmission mechanism comprises a fourth worm, a fourth turbine and an inner shaft, wherein the fourth worm is concentrically connected with an output shaft of a fourth motor, the fourth worm is in transmission fit with the fourth turbine, the fourth turbine is fixedly sleeved on the inner shaft, a sixth worm is arranged on the inner shaft, and the sixth worm is in transmission fit with a sixth turbine at the end part of the antenna swing arm.
Still further, the horizontal rotation mechanism includes a fifth motor that provides power and a rotation transmission mechanism that is responsible for converting the output of the motor into horizontal rotation motion of the antenna swing arm.
Still further, the rotation transmission mechanism comprises a fifth worm, a fifth turbine, an outer shaft and an overhanging seat, wherein the fifth worm is concentrically connected with an output shaft of the fifth motor, the fifth worm is in transmission fit with the fifth turbine, a fifth wheel is fixedly sleeved on the outer shaft, the overhanging seat is rotatably sleeved on the inner shaft, the overhanging seat is meshed with the outer shaft, and the antenna swing arm is rotatably connected with the overhanging seat through a pin.
Compared with the prior art, the invention has the beneficial effects that:
1. The coverage of signal transmission or signal reception is wider. As the signal tower adopts multi-axis rotation, the signal transmitting or receiving device can perform multi-angle large-range movement, thereby achieving wider signal coverage.
2. The reliability of the mobile base station is higher. Because the signal tower is provided with a carrying platform with a plurality of signal receiving or transmitting devices, the signal tower can carry the standby signal receiving or transmitting devices, and when a certain signal receiving or transmitting device fails, the signal tower only needs to rotate the normal signal receiving or transmitting device to the position to continue working.
Description of the drawings:
fig. 1 is a schematic diagram of the present invention after mounting a signal transmitting or receiving device.
FIG. 2 is a schematic diagram of the present invention.
Fig. 3 is a front view of a three-axis pan-tilt mechanism.
Fig. 4 is a top view of a three-axis pan-tilt mechanism.
Fig. 5 is a schematic diagram of the principle of the rotatable support.
In the figure, the reference numerals 1-box, 2-first motor, 3-first pitch axis, 4-second motor, 5-second pitch axis, 6-third motor, 7-mandrel, 8-third worm, 9-third worm, 10-first worm, 11-first worm, 12-connecting disc, 13-second worm, 14-second worm, 100-triaxial holder mechanism, 200-rotatable support system, 201-fourth motor, 202-fifth motor, 203-fourth worm, 204-fourth worm, 205-fifth worm, 206-fifth worm, 207-inner shaft, 208-outer shaft, 209-overhanging seat, 210-sixth worm, 211-sixth worm, 212-antenna swing arm, 213-pin, 300-signal transmitting or receiving device.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
As shown in figures 3-4, the three-axis pan-tilt mechanism comprises a box body 1, a first motor 2, a first pitching axis 3,
The second motor 4, the second pitching shaft 5, the third motor 6 and the mandrel 7; the first motor 2 is fixed on the box body 1, a first worm 10 is arranged on an output shaft of the first motor 2, two ends of the first worm 10 are rotatably supported on a bracket, two ends of a first pitching shaft 3 are erected on two walls of the box body 1 through bearings, a first turbine 11 arranged on the first pitching shaft 3 is in transmission fit with the first worm 10, two ends of the first pitching shaft 3 are provided with connecting discs 12, and the connecting discs 12 are positioned outside the box body 1; the second motor 4 is fixed on the box body 1, a second worm 13 is arranged on an output shaft of the second motor 4, two ends of the second worm 13 are rotatably supported on a bracket, two ends of a second pitching shaft 5 are erected on two walls of the box body 1 through bearings, a second turbine 14 arranged on the second pitching shaft 5 is in transmission fit with the second worm 13, two ends of the second pitching shaft 5 are provided with connecting discs 12, and the connecting discs 12 are positioned outside the box body 1; the dabber 7 passes the bottom of box 1 and is connected with the bottom of box 1, and box 1 can rotate around dabber 7, and the bottom of box 1 is connected with dabber 7 with the bearing, and third motor 6 is fixed on box 1, has arranged third worm 8 on the output shaft of third motor 6, and the both ends of third worm 8 rotatably support on the support, and the dabber 7 is fixed with third turbine 9, transmission cooperation between third worm 8 and the third turbine 9. In operation, as shown in fig. 1, when the third motor 6 rotates, the third worm 8 is driven to rotate, the third turbine 9 is meshed with the third worm 8, the third turbine 9 rotates relatively, and the mandrel 7 is fixed on the vehicle body and cannot rotate due to the fact that the third turbine 9 is fixed with the mandrel 7, so that the box 1 rotates around the mandrel 7 by A-A under the rotation of the motor 6. When the first motor 2 rotates, the two connecting discs 12 at the two ends of the first pitching shaft 3 are driven to rotate B-B; and similarly, the two connecting discs 12 at the two ends of the second pitching shaft 5 rotate C-C. Under the action of an external control circuit, the three motors can be controlled to realize the compound motion of 4 connecting discs 12 rotating around the mandrel 7 and the pitching axes, so that the signal transmitting device or the signal receiving device arranged on the connecting discs 12 can face to different angles in an omnibearing manner as required.
As shown in fig. 5, the rotatable mount includes an antenna swing arm 212, a horizontal rotation mechanism, and an up-and-down swing mechanism. The up-down swinging mechanism comprises a fourth motor 201, a fourth worm 203, a fourth turbine 204 and an inner shaft 207, wherein the fourth worm 203 is concentrically connected with an output shaft of the fourth motor 201, the fourth worm 203 is in transmission fit with the fourth turbine 204, the fourth turbine 204 is fixedly sleeved on the inner shaft 207, a sixth worm 210 is arranged on the inner shaft 207, and the sixth worm 210 is in transmission fit with a sixth turbine 211 at the end part of an antenna swinging arm 212; the horizontal rotation mechanism comprises a fifth motor 202, a fifth worm 205, a fifth turbine 206, an outer shaft 208 and an overhanging seat 209, the fifth worm 205 is concentrically connected with an output shaft of the fifth motor 202, the fifth worm 205 is in transmission fit with the fifth turbine 206, the fifth turbine 206 is sleeved and fixed on the outer shaft 208, the overhanging seat 209 is rotatably sleeved and connected on the inner shaft 207, the overhanging seat 209 is meshed with the outer shaft 208, the antenna swing arm 212 is rotatably connected on the overhanging seat 209 through a pin 213, the outer shaft 208 is a hollow shaft, and the outer shaft 208 is rotatably sleeved and connected on the outer part of the inner shaft 207.
In particular implementations, the present invention is disposed on the roof of a mobile base station and the antenna is disposed on the antenna swing arm 212. When the fourth motor 201 is operated under the control of the external circuit, the inner shaft 207 rotates under the action of the fourth worm 203 and the fourth worm wheel 204, the sixth worm 210 rotates along with the inner shaft 207, and the antenna swing arm 212 swings up and down around the pin 213 due to the engagement of the sixth worm 210 and the sixth worm wheel 211; similarly, when fifth motor 202 is operated under the control of an external circuit, as outer shaft 208 engages with outer housing 209, outer housing 209 rotates about inner shaft 207, thereby driving antenna swing arm 212 to rotate horizontally about inner shaft 207. Thereby enabling the antenna disposed on the antenna swing arm 212 to produce a compound motion that is both rotational about the inner shaft 207 and up and down about the pin 213, maximizing the coverage area of the antenna.
As shown in fig. 1-2, the signal transmitting or receiving apparatus 300 is mounted on the connection pad 12 and the antenna swing arm 212, and the signal transmitting or receiving apparatus 300 may be various signal transmitting apparatuses or various signal receiving apparatuses including an antenna, as required. The rotatable support system (200) comprises a rotatable support and a connecting plate, wherein the rotatable support is uniformly arranged along the circumferential direction of the connecting plate, a motor and a worm and gear system are further arranged below the connecting plate, and when the motor below the connecting plate runs, the rotating of the connecting plate can be driven through the worm and gear, so that the rotatable support is driven to rotate around the mandrel 7.
Claims (3)
1. A signal tower, characterized in that: the three-axis tripod head mechanism (100) and the rotatable support system (200) can rotate around the same mandrel (7) independently;
The three-axis tripod head mechanism (100) is provided with a connecting disc (12), the connecting disc (12) can generate composite motion formed by rotating around a rotating shaft of the connecting disc and rotating around the mandrel (7) under the action of power, the rotatable support system (200) comprises at least one rotatable support, the rotatable support is provided with an antenna swing arm (212), and the antenna swing arm (212) can generate composite motion formed by rotating around the rotating shaft of the connecting disc and rotating around the mandrel (7) under the action of power;
The rotatable support system (200) comprises a rotating plate and the rotatable support, wherein the rotatable support is arranged on the rotating plate, and the rotating plate is sleeved on the mandrel (7) and is in rotary connection with the mandrel (7); the rotatable support comprises the antenna swing arm (212), a horizontal rotating mechanism and an up-and-down swinging mechanism, wherein the horizontal rotating mechanism drives the antenna swing arm (212) to rotate in a horizontal plane, and the up-and-down swinging mechanism drives the antenna swing arm (212) to swing up and down; the up-and-down swinging mechanism comprises a fourth motor (201) and a swinging transmission mechanism, wherein the fourth motor (201) provides power, and the swinging transmission mechanism is used for converting the output of the motor into up-and-down swinging of the antenna swinging arm (212); the swing transmission mechanism comprises a fourth worm (203), a fourth turbine (204) and an inner shaft (207), wherein the fourth worm (203) is concentrically connected with an output shaft of a fourth motor (201), the fourth worm (203) is in transmission fit with the fourth turbine (204), the fourth turbine (204) is fixedly sleeved on the inner shaft (207), a sixth worm (210) is arranged on the inner shaft (207), and the sixth worm (210) is in transmission fit with a sixth turbine (211) at the end part of an antenna swing arm (212);
The horizontal rotation mechanism comprises a fifth motor (202) and a rotation transmission mechanism, wherein the fifth motor (202) provides power, and the rotation transmission mechanism is used for converting the output of the motor into horizontal rotation motion of the antenna swing arm (212);
The rotary transmission mechanism comprises a fifth worm (205), a fifth turbine (206), an outer shaft (208) and an overhanging seat (209), wherein the fifth worm (205) is concentrically connected with an output shaft of the fifth motor (202), the fifth worm (205) is in transmission fit with the fifth turbine (206), the fifth turbine (206) is sleeved and fixed on the outer shaft (208), the overhanging seat (209) is rotatably sleeved and connected on the inner shaft (207), the overhanging seat (209) is meshed with the outer shaft (208), and an antenna swing arm (212) is rotatably connected on the overhanging seat (209) through a pin (213); the outer shaft (208) is a hollow shaft, and the outer shaft (208) is rotatably sleeved outside the inner shaft (207); the rotatable support system (200) comprises three rotatable supports which are uniformly distributed in the circumferential direction;
The signal tower is arranged on the roof of a mobile base station, and an antenna is arranged on an antenna swing arm (212).
2. The signal tower according to claim 1, wherein the three-axis pan-tilt mechanism (100) comprises a box body (1), a first motor (2), a first pitching axis (3), a second motor (4), a second pitching axis (5) and a third motor (6);
The first motor (2) is fixed on the box body (1), a first worm (10) is arranged on an output shaft of the first motor (2), the first pitching shaft (3) is rotatably erected on the box body (1) through two walls of the box body (1), a first turbine (11) arranged on the first pitching shaft (3) is in transmission fit with the first worm (10), a connecting disc (12) is respectively arranged at two ends of the first pitching shaft (3), and the connecting disc (12) is positioned outside the box body (1); the second motor (4) is fixed on the box body (1), a second worm (13) is arranged on an output shaft of the second motor (4), a second pitching shaft (5) is rotatably erected on the box body (1) through two walls of the box body (1), a second turbine (14) arranged on the second pitching shaft (5) is in transmission fit with the second worm (13), two ends of the second pitching shaft (5) are respectively provided with another connecting disc (12), and the connecting discs (12) are positioned outside the box body (1); the dabber (7) pass the bottom of box (1) and be connected with the bottom of box (1), and box (1) can rotate around dabber (7), and third motor (6) are fixed on box (1), have arranged third worm (8) on the output shaft of third motor (6), are fixed with third turbine (9) on dabber (7), transmission cooperation between third worm (8) and third turbine (9).
3. A signalling tower according to claim 2, characterized in that the first worm (10) is rotatably supported at both ends on a first bracket, which is fixed to the bottom of the housing (1), the second worm (13) is rotatably supported at both ends on a second bracket, which is fixed to the bottom of the housing (1), the third worm (8) is rotatably supported at both ends on a third bracket, which is fixed to the bottom of the housing (1), the first pitch shaft (3) is journalled at both ends on both walls of the housing (1), and the second pitch shaft (5) is journalled at both ends on both walls of the housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811636990.2A CN109854890B (en) | 2018-12-29 | 2018-12-29 | Signal tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811636990.2A CN109854890B (en) | 2018-12-29 | 2018-12-29 | Signal tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854890A CN109854890A (en) | 2019-06-07 |
| CN109854890B true CN109854890B (en) | 2024-06-04 |
Family
ID=66893230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811636990.2A Active CN109854890B (en) | 2018-12-29 | 2018-12-29 | Signal tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109854890B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112367092B (en) * | 2020-11-10 | 2021-12-10 | 广东信测科技有限公司 | Energy-saving anti-interference 5G signal receiving device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038378A (en) * | 1988-04-12 | 1989-12-27 | 根本企画工业株式会社 | Antenna assembly and attitude control method thereof |
| JPH04291805A (en) * | 1991-03-20 | 1992-10-15 | Japan Radio Co Ltd | Rocking compensation type antenna system |
| JPH09214235A (en) * | 1996-02-02 | 1997-08-15 | Nec Eng Ltd | Antenna directing device |
| CN1254447A (en) * | 1997-04-30 | 2000-05-24 | 阿尔卡塔尔公司 | Antenna system, in particular for pointing moving nonsynchronous satellites |
| CN201797605U (en) * | 2010-07-23 | 2011-04-13 | 重庆迪马工业有限责任公司 | Revolution platform of mobile communication antenna feed system |
| CN105071018A (en) * | 2015-08-18 | 2015-11-18 | 北京航天控制仪器研究所 | Supporting mechanism capable of adjusting angle for multi-face directional antenna |
| CN108832298A (en) * | 2018-06-25 | 2018-11-16 | 青岛纳川电气科技有限公司 | Four antenna servo control systems of one kind and application method |
| CN209354898U (en) * | 2018-12-29 | 2019-09-06 | 重庆迪马工业有限责任公司 | Novel signal tower |
-
2018
- 2018-12-29 CN CN201811636990.2A patent/CN109854890B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038378A (en) * | 1988-04-12 | 1989-12-27 | 根本企画工业株式会社 | Antenna assembly and attitude control method thereof |
| JPH04291805A (en) * | 1991-03-20 | 1992-10-15 | Japan Radio Co Ltd | Rocking compensation type antenna system |
| JPH09214235A (en) * | 1996-02-02 | 1997-08-15 | Nec Eng Ltd | Antenna directing device |
| CN1254447A (en) * | 1997-04-30 | 2000-05-24 | 阿尔卡塔尔公司 | Antenna system, in particular for pointing moving nonsynchronous satellites |
| CN201797605U (en) * | 2010-07-23 | 2011-04-13 | 重庆迪马工业有限责任公司 | Revolution platform of mobile communication antenna feed system |
| CN105071018A (en) * | 2015-08-18 | 2015-11-18 | 北京航天控制仪器研究所 | Supporting mechanism capable of adjusting angle for multi-face directional antenna |
| CN108832298A (en) * | 2018-06-25 | 2018-11-16 | 青岛纳川电气科技有限公司 | Four antenna servo control systems of one kind and application method |
| CN209354898U (en) * | 2018-12-29 | 2019-09-06 | 重庆迪马工业有限责任公司 | Novel signal tower |
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| CN109854890A (en) | 2019-06-07 |
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