CN213367149U - Small-size power supply box suitable for 5G basic station - Google Patents
Small-size power supply box suitable for 5G basic station Download PDFInfo
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- CN213367149U CN213367149U CN202021961421.8U CN202021961421U CN213367149U CN 213367149 U CN213367149 U CN 213367149U CN 202021961421 U CN202021961421 U CN 202021961421U CN 213367149 U CN213367149 U CN 213367149U
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Abstract
The utility model discloses a small-sized power box suitable for a 5G base station, which is characterized by comprising a power box body, wherein the power box body is provided with an air inlet end and an air outlet end, the air outlet end comprises an air outlet hole and a fan, the air inlet end comprises an air inlet, a filtering device and a cleaning device, the filtering device comprises a shell body, a first filtering piece which is close to the air inlet and used for filtering large-particle sundries and a second filtering piece which is far away from the air inlet and used for filtering small-particle sundries are arranged in the shell body, the cleaning device is arranged between the first filtering piece and the second filtering piece, the cleaning device comprises a driving motor, the driving motor comprises two rotating shafts which are respectively arranged towards the first filtering piece and the second filtering piece, cleaning brushes are respectively arranged on the two rotating shafts, one end of the two cleaning brushes, which is far away from the driving motor, is respectively abutted against the, the power box has a good filtering effect and a self-cleaning function.
Description
Technical Field
The utility model relates to a power supply box, more specifically say, it relates to a small-size power supply box suitable for 5G basic station.
Background
With the technical development of the communication industry, 5G technology comes along, the construction of 5G base stations is also expanded in a large scale, and since the 5G network uses high-frequency signals, the coverage area is smaller than that of the 4G network, so that the construction of the 5G network requires denser sites.
Every 5G basic station all need be equipped with a power supply box, in order to strengthen the heat dissipation function of power supply box, so the power supply box can be provided with air inlet and air-out device, though solved the heat dissipation problem, the serious phenomenon of deposition can appear in the power supply box inside, causes inside electronic component life-span to shorten, and artificial clean power supply box is too time-consuming and laborious again, so at present need a section filter capacity strong to power supply box that can self-cleaning.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a small-size power supply box suitable for 5G basic station, this power supply box can have the function of automatically cleaning when having very good filtration effect.
In order to achieve the above purpose, the utility model provides a following technical scheme: a small-sized power box suitable for a 5G base station comprises a power box body and a plurality of electrical devices arranged in the power box body, the power box body is provided with an air inlet end and an air outlet end, the air outlet end comprises a plurality of air outlet holes and a fan for circulating air to the power box body, the air inlet end is arranged below the power supply box body, the air outlet end is arranged above the power supply box body, the air inlet end comprises an air inlet, a filtering device for filtering the air inlet and a cleaning device for cleaning the filtering device, the filtering device comprises a shell body, a first filtering piece and a second filtering piece are arranged in the shell body, the first filtering piece is close to an air inlet and used for filtering large-particle impurities, the second filtering piece is far away from the air inlet and used for filtering small-particle impurities, and the first filtering piece and the second filtering piece are located in the same vertical plane;
cleaning device sets up and filters between piece in first filtration piece and second, cleaning device is including fixed mounting in this internal driving motor of shell, driving motor is including two pivots, two the pivot is towards first filtration piece and the setting of second filtration piece respectively, and two all be provided with the cleaning brush in the pivot, two driving motor's one end is kept away from to the cleaning brush filters the butt with first filtration piece and second respectively.
The utility model discloses further set up to: the cleaning brush comprises a connecting piece connected with the rotating shaft and a brush head piece detachably connected with the connecting piece.
The utility model discloses further set up to: the connecting piece comprises a bearing part and a connecting part, the bearing part is arranged in an Contraband-shaped structure, the connecting part is connected with the brush head piece, and the bearing part comprises a first flat plate, a second flat plate and a connecting vertical plate, the first flat plate is abutted to a shell of the driving motor, the second flat plate is used for being connected with the connecting part, and the connecting vertical plate is used for connecting the first flat plate and the second flat plate;
be provided with the perforation that supplies the pivot to pass on the first flat board, be provided with the through-hole on the second flat board, be provided with first screw in the through-hole, it is provided with the first screw hole that supplies first screw spiro union to fix to prolong its axial in the pivot, be provided with a plurality of second screw holes on the connection riser, the pivot is provided with the butt plane towards one side of connecting the riser, the spiro union has the second screw that is used for with the fixed of butt plane butt in the second screw hole.
The utility model discloses further set up to: the connecting part is fixedly connected to one side, far away from the connecting vertical plate, of the second flat plate, and the connecting part is arranged in parallel with the connecting vertical plate.
The utility model discloses further set up to: the air outlet end is an air outlet shell at the upper end of the power box body, the fan is arranged on the lower end face of the air outlet shell, a cavity for air supply circulation is formed in the air outlet shell, the length size of the air outlet shell is larger than that of the power box body, the air outlet shell comprises an air outlet portion located outside the power box body in the length direction, and the air outlet is formed in the lower end face of the air outlet portion.
The utility model discloses further set up to: install fan unit on the shell body, the second filters one side of installing to the air outlet and being close to the air intake, fan unit sets up in one side that the air intake was kept away from to the air outlet.
The utility model discloses further set up to: the fan assembly comprises an air inlet fan and an air outlet fan, and the air inlet fan and the air outlet fan are alternatively arranged on the shell body.
The utility model discloses further set up to: the fan assembly comprises a first fan and a second fan, the first fan is used for enhancing an air inlet effect, the second fan is used for enhancing a cleaning effect, the first fan and the second fan are sequentially arranged on one side of the air outlet, the first fan is located between the second fan and the air outlet, an extension plate used for installing the first fan and the second fan is arranged on the shell body, the second fan is fixedly arranged on the extension plate, the first fan is arranged on the extension plate in a sliding mode, and a driving piece used for driving the first fan to slide along the width direction of the extension plate is arranged on the extension plate.
The utility model discloses further set up to: the extension board is provided with two to be located the relative both sides of first fan respectively, two be provided with the first groove and the second groove that slides that supply first fan to slide on the extension board respectively, first groove and the second groove that slides all extend the setting along the width direction of extension board.
The utility model discloses further set up to: the driving piece is including setting up in the guide bar of first inslot that slides, and set up in the screw rod of second inslot that slides and be used for driving screw rod pivoted rotation motor, be provided with the guiding hole that supplies the guide bar to pass on the shell of first fan and supply screw rod spiro union hole.
To sum up, the utility model discloses following beneficial effect has: carry out the in-process that the wind cooled in to the power supply box body, make wind pass through first filter piece and second filter piece in proper order when getting into the power supply box body from the air inlet end through starting the fan, filter its separation externally with large granule debris through first filter piece, filter between first filter piece and the second filter piece with the granule debris through the second, blow off dustless wind from the air-out end at last through inside electronic component, when needs carry out cleaning operation, rotate through driving motor drive pivot, make epaxial cleaning brush of pivot carry out 360 rotations of a plurality of circles thereupon, will remain the dust on first filter piece and the second filter piece, impurity removes, the miscellaneous dirt that falls can directly waft in the filtration hole of first filter piece, prevent to pile up in the shell body.
So through this filter from cleaning device, when guaranteeing that this internal air-cooled that carries on of power supply box, carry out filtering operation to outside mote, guarantee that the inside electronic component of power supply box body can not take place because the too much condition that causes the life-span to shorten of dust, secondly filter first piece and second and clear away the operation to improve the ventilation nature of first piece and second and the life of filterability.
Drawings
FIG. 1 is a schematic perspective view of a small power box;
FIG. 2 is a schematic perspective view of the self-cleaning device;
FIG. 3 is an exploded view of the drive motor and cleaning brush;
fig. 4 is a schematic perspective view of an embodiment of a fan assembly.
Reference numerals: 1. a power box body; 2. an air inlet end; 21. an air inlet; 22. a filtration device; 221. a housing body; 222. a first filter member; 223. a second filter member; 224. an extension plate; 2241. a first sliding groove; 2242. a second sliding groove; 23. a cleaning device; 231. a drive motor; 232. a rotating shaft; 2321. a first threaded hole; 2322. an abutment plane; 233. a cleaning brush; 2331. a connecting member; 23311. a receiving part; 23312. a connecting portion; 23313. a first plate; 23314. a second plate; 23315. connecting a vertical plate; 23316. perforating; 23317. a through hole; 23318. a second threaded hole; 2332. a brush head member; 3. an air outlet end; 31. an air outlet; 32. a fan; 33. an air outlet shell; 331. an air outlet part; 4. a fan assembly; 41. a first fan; 42. a second fan; 5. a drive member; 51. a guide bar; 52. a screw; 53. the motor is rotated.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1 to 4, in order to achieve the above object, the present invention provides the following technical solutions: a small-sized power box suitable for a 5G base station comprises a power box body 1, wherein an air inlet end 2 and an air outlet end 3 are arranged on the power box body 1, the air outlet end 3 comprises a plurality of air outlet holes 31 and a fan 32 used for carrying out air circulation on the power box body 1, the air inlet end 2 comprises an air inlet 21, a filtering device 22 used for carrying out filtering operation on the air inlet 21 and a cleaning device 23 used for carrying out cleaning operation on the filtering device 22, the filtering device 22 comprises a shell body 221, and a first filtering piece 222 close to the air inlet 21 and used for filtering large-particle impurities and a second filtering piece 223 far away from the air inlet 21 and used for filtering small-particle impurities are arranged in the shell body 221;
cleaning device 23 sets up and filters between piece 222 and the second filter piece 223 in first, cleaning device 23 is including the driving motor 231 of fixed mounting in shell body 221, driving motor 231 is including two pivots 232, two pivots 232 filter piece 222 and the setting of second filter piece 223 towards first respectively, and all be provided with cleaning brush 233 in two pivots 232, the one end that driving motor 231 was kept away from to two cleaning brushes 233 respectively with first filter piece 222 and the butt of second filter piece 223.
The utility model discloses a design: in the process of cooling the interior of the power box body 1 by wind, when wind enters the power box body 1 from the wind inlet end 2 by starting the fan 32, the wind sequentially passes through the first filter piece 222 and the second filter piece 223, large-particle impurities are blocked outside by the first filter piece 222, small-particle impurities are filtered between the first filter piece 222 and the second filter piece 223 by the second filter piece 223, finally, dust-free wind passes through the internal electronic elements and is blown out from the wind outlet end 3, when cleaning operation is required, the rotating shaft 232 is driven to rotate by the driving motor 231, so that the cleaning brush 233 on the rotating shaft 232 rotates for a plurality of circles 360 degrees along with the rotating shaft, dust and impurities remained on the first filter piece 222 and the second filter piece 223 are removed, and because the first filter piece 222 and the second filter piece 223 are positioned in the same vertical plane, the fallen impurities can directly flow out from the filter holes of the first filter piece 222, preventing accumulation within the housing body 221.
Therefore, through the filtering self-cleaning device 23, the air cooling is performed in the power box body 1, and meanwhile, the filtering operation is performed on the external dust, so that the situation that the service life of the electronic element in the power box body 1 is shortened due to excessive dust is avoided, and then the first filtering piece 222 and the second filtering piece 223 are cleaned, so that the ventilation performance and the filtering performance of the first filtering piece 222 and the second filtering piece 223 are prolonged.
The cleaning brush 233 includes a connecting member 2331 connected to the rotation shaft 232, and a brush head member 2332 detachably connected to the connecting member 2331. Since the brush head 2332 is in contact with the first filter element 222 and the second filter element 223 for a long time, a certain degree of wear occurs, and the brush head 2332 is replaced to ensure that the device has a good cleaning function all the time.
The connecting member 2331 comprises a receiving portion 23311 arranged in an "Contraband" shape and a connecting portion 23312 connected to the brush head 2332, the receiving portion 23311 comprises a first flat plate 23313 abutted to the housing of the driving motor 231, a second flat plate 23314 connected to the connecting portion 23312, and a connecting vertical plate 23315 connected to the first flat plate 23313 and the second flat plate 23314;
a through hole 23316 through which the rotating shaft 232 passes is formed in the first flat plate 23313, a through hole 23317 is formed in the second flat plate 23314, a first screw is arranged in the through hole 23317, a first threaded hole 2321 for screwing and fixing the first screw is formed in the rotating shaft 232 along the axial direction of the rotating shaft, a plurality of second threaded holes 23318 are formed in the connecting vertical plate 23315, an abutting plane 2322 is arranged on one side, facing the connecting vertical plate 23315, of the rotating shaft 232, and a second screw for abutting and fixing the abutting plane 2322 is screwed in the second threaded hole 23318.
The rotating shaft 232 penetrates through the through hole 23316, the first flat plate 23313 abuts against the outer shell of the driving motor 231, then the first screw penetrates through the through hole 23317 of the second flat plate 23314 to be fixedly screwed with the first threaded hole 2321 on the rotating shaft 232, and then the second screw is screwed with the second threaded hole 23318 until the screwed end of the second screw abuts against and is fixedly fixed with the abutting plane 2322, the connecting piece 2331 and the rotating shaft 232 are stably connected through two fixing modes, and the driving motor 231 can be ensured to stably rotate along with the cleaning brush 233 in the rotating process.
Connecting portion 23312 is fixedly connected to the side of second plate 23314 remote from connecting riser 23315, and connecting portion 23312 is disposed parallel to connecting riser 23315. The force of gravity on connecting portion 23312 and brushhead 2332 acts on second plate 23314, tending to move second plate 23314 outward or inward, causing a pulling force on connecting riser 23315 against shaft 232, making the connection of connecting member 2331 to shaft 232 more secure.
The first filter 222 is a metal filter and the second filter 223 is a filter sponge. The filtering sponge is 60ppi sponge, has better filtering function, and can easily remove the dust when removing. The use of a sponge also allows for replacement after a period of use.
The air outlet end 3 is an air outlet shell 33 at the upper end of the power box body 1, the fan 32 is arranged on the lower end face of the air outlet shell 33, a cavity for air supply circulation is arranged in the air outlet shell 33, the length dimension of the air outlet shell 33 is larger than that of the power box body 1, the air outlet shell 33 comprises an air outlet portion 331 located outside the power box body 1 in the length direction, and the air outlet hole 31 is arranged on the lower end face of the air outlet portion 331. The design of air-out shell 33 and the position design of exhaust vent 31 can be dustproof rain-proof, guarantees that power supply box body 1 is inside can not intake when the ventilative.
The housing body 221 is provided with the fan assembly 4, the second filter member 223 is mounted to one side of the air outlet close to the air inlet 21, and the fan assembly 4 is disposed on one side of the air outlet far away from the air inlet 21.
The fan assembly 4 includes an air inlet fan and an air outlet fan, and the air inlet fan and the air outlet fan are selectively installed on the housing body 221. When the air inlet fan is mounted on the shell body 221, the air inlet fan can enhance the air inlet effect of the power box, so that a better cooling effect is achieved; when installing air outlet fan to shell body 221 on, air outlet fan can carry out the additional action when cleaing away the operation, improves and clears away the effect.
The fan assembly 4 includes a first fan 41 for enhancing an air intake effect and a second fan 42 for enhancing a cleaning effect, the first fan 41 and the second fan 42 are sequentially disposed at one side of the air outlet, the first fan 41 is located between the second fan 42 and the air outlet, an extension plate 224 for mounting the first fan 41 and the second fan 42 is disposed on the housing body 221, the second fan 42 is fixedly mounted on the extension plate 224, the first fan 41 is slidably mounted on the extension plate 224, and a driving member 5 for driving the first fan 41 to slide along a width direction of the extension plate 224 is disposed on the extension plate 224. When all installing first fan 41 and second fan 42 to extension board 224 on, first fan 41 is located between second fan 42 and the air outlet, because the air outlet need be hugged closely in the air inlet operation, just can guarantee that the wind direction is unanimous from beginning to end, plays the best effect of induced drafting, and when clean, only need windy can be unimpeded blow to the air outlet can.
When the air intake effect needs to be enhanced, the first fan 41 is directly started, and when the cleaning effect needs to be enhanced, the first fan 41 is moved to a position where the second fan 42 is not obstructed by the driving member 5, and then the second fan 42 is started.
The extension board 224 is provided with two to be located the relative both sides of first fan 41 respectively, be provided with the first groove 2241 and the second groove 2242 that slides that supplies first fan 41 to slide on two extension boards 224 respectively, first groove 2241 and the second groove 2242 that slides all extend the setting along the width direction of extension board 224.
The driving member 5 includes a guide rod 51 disposed in the first sliding slot 2241, a screw 52 disposed in the second sliding slot 2242, and a rotating motor 53 for driving the screw 52 to rotate, and a housing of the first fan 41 is provided with a guide hole for the guide rod 51 to pass through and a screw hole for the screw 52 to be screwed.
The first sliding groove 2241 and the second sliding groove 2242 are designed to facilitate the two sides of the first fan 41 to be respectively embedded, so that the first fan 41 and the first fan 1 cannot move up and down violently in the moving process; 2. the first fan 41 can be stably moved.
The guide rod 51 and the screw rod 52 are designed, when the movement is needed, the screw rod 52 is driven to rotate by the rotating motor 53, so that the first fan 41 stably moves along the guide rod 51, and an ideal and controllable sliding effect is achieved. The user controls the cleaning device 23 to achieve a desired enhanced air intake effect or enhanced cleaning effect by switching the driving motor 231 and the first and second fans 41 and 42.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a small-size power supply box suitable for 5G basic station, including power supply box body (1) with set up a plurality of electrical equipment in power supply box body (1), be provided with an air inlet end (2) and an air-out end (3) on power supply box body (1), air-out end (3) including a plurality of exhaust vents (31) and be used for carrying out fan (32) of wind circulation to power supply box body (1), characterized by: the air inlet end (2) is arranged below the power box body (1), the air outlet end (3) is arranged above the power box body (1), the air inlet end (2) comprises an air inlet (21), a filtering device (22) used for filtering the air inlet (21) and a cleaning device (23) used for cleaning the filtering device (22), the filtering device (22) comprises a shell body (221), a first filtering piece (222) close to the air inlet (21) and used for filtering large-particle impurities and a second filtering piece (223) far away from the air inlet (21) and used for filtering small-particle impurities are arranged in the shell body (221), and the first filtering piece (222) and the second filtering piece (223) are located in the same vertical plane;
cleaning device (23) set up and filter between piece (223) in first filtering piece (222) and second, cleaning device (23) are including driving motor (231) of fixed mounting in shell body (221), driving motor (231) including two pivot (232), two pivot (232) are respectively towards first filtering piece (222) and second filtering piece (223) setting, and two all be provided with cleaning brush (233) on pivot (232), two the one end that driving motor (231) were kept away from in cleaning brush (233) is respectively with first filtering piece (222) and second filtering piece (223) butt.
2. The small power box of claim 1, wherein the power box is adapted to a 5G base station, and comprises: the cleaning brush (233) comprises a connecting piece (2331) connected with the rotating shaft (232) and a brush head piece (2332) detachably connected with the connecting piece (2331).
3. A small power supply box suitable for 5G base station as claimed in claim 2, wherein: the connecting piece (2331) comprises a bearing part (23311) arranged in an Contraband-shaped structure and a connecting part (23312) connected with the brush head piece (2332), wherein the bearing part (23311) comprises a first flat plate (23313) abutted to the shell of the driving motor (231), a second flat plate (23314) connected with the connecting part (23312) and a connecting vertical plate (23315) used for connecting the first flat plate (23313) and the second flat plate (23314);
the connecting structure is characterized in that a through hole (23316) for the rotating shaft (232) to penetrate through is formed in the first flat plate (23313), a through hole (23317) is formed in the second flat plate (23314), a first screw is arranged in the through hole (23317), a first threaded hole (2321) for the first screw to be fixed in a threaded mode is formed in the rotating shaft (232) along the axial direction of the rotating shaft, a plurality of second threaded holes (23318) are formed in the connecting vertical plate (23315), an abutting plane (2322) is arranged on one side, facing the connecting vertical plate (23315), of the rotating shaft (232), and a second screw used for being abutted and fixed with the abutting plane (2322) is screwed in the second threaded hole (23318).
4. A compact power supply box suitable for 5G base station as claimed in claim 3, wherein: the connecting part (23312) is fixedly connected to one side of the second flat plate (23314) far away from the connecting vertical plate (23315), and the connecting part (23312) is arranged in parallel with the connecting vertical plate (23315).
5. The small power box of claim 1, wherein the power box is adapted to a 5G base station, and comprises: air-out end (3) is air-out shell (33) of power supply box body (1) upper end, fan (32) set up on the lower terminal surface of air-out shell (33), be provided with the cavity that supplies the wind circulation in air-out shell (33), the length dimension of air-out shell (33) is greater than the length dimension of power supply box body (1), air-out shell (33) is including being located power supply box body (1) length direction outside air-out portion (331), exhaust vent (31) set up on the lower terminal surface of air-out portion (331).
6. The small power box of claim 1, wherein the power box is adapted to a 5G base station, and comprises: install fan unit (4) on shell body (221), second filter piece (223) are installed to one side that the air outlet is close to air intake (21), fan unit (4) set up in one side that air intake (21) were kept away from to the air outlet.
7. The small power box of claim 6, wherein the power box comprises: the fan assembly (4) comprises an air inlet fan and an air outlet fan, and the air inlet fan and the air outlet fan are alternatively installed on the shell body (221).
8. The small power box of claim 6, wherein the power box comprises: fan assembly (4) including first fan (41) of strengthening the air inlet effect and second fan (42) of strengthening clean effect, first fan (41) and second fan (42) set gradually in one side of air outlet, first fan (41) are located between second fan (42) and the air outlet, be provided with extension board (224) that supply first fan (41) and second fan (42) installation on shell body (221), second fan (42) fixed mounting is on extension board (224), first fan (41) slide and install on extension board (224), be provided with driving piece (5) that are used for driving first fan (41) and slide along the width direction of extension board (224) on extension board (224).
9. The small power box of claim 8, wherein the power box is adapted to a 5G base station, and comprises: extension board (224) are provided with two to be located the relative both sides of first fan (41) respectively, two be provided with respectively on extension board (224) and supply first fan (41) first groove (2241) and the second groove (2242) that slides, first groove (2241) and the second groove (2242) that slides all extend the setting along the width direction of extension board (224).
10. A compact power supply box suitable for 5G base station as claimed in claim 9, wherein: driving piece (5) including set up guide bar (51) in first groove (2241) that slides, and set up screw rod (52) in second groove (2242) that slides and be used for driving screw rod (52) pivoted rotation motor (53), be provided with the guiding hole that supplies guide bar (51) to pass on the shell of first fan (41) and supply screw rod (52) spiro union hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021961421.8U CN213367149U (en) | 2020-09-09 | 2020-09-09 | Small-size power supply box suitable for 5G basic station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021961421.8U CN213367149U (en) | 2020-09-09 | 2020-09-09 | Small-size power supply box suitable for 5G basic station |
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| Publication Number | Publication Date |
|---|---|
| CN213367149U true CN213367149U (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021961421.8U Expired - Fee Related CN213367149U (en) | 2020-09-09 | 2020-09-09 | Small-size power supply box suitable for 5G basic station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114190044A (en) * | 2021-11-25 | 2022-03-15 | 北京九九之声科技有限公司 | Alarm device based on electromagnetic wave emission base |
-
2020
- 2020-09-09 CN CN202021961421.8U patent/CN213367149U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114190044A (en) * | 2021-11-25 | 2022-03-15 | 北京九九之声科技有限公司 | Alarm device based on electromagnetic wave emission base |
| CN114190044B (en) * | 2021-11-25 | 2023-12-29 | 北京九九之声科技有限公司 | Alarm device based on electromagnetic wave emission base |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210604 |
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| CF01 | Termination of patent right due to non-payment of annual fee |