CN111712092B - Communication equipment dust keeper for geographical survey - Google Patents

Communication equipment dust keeper for geographical survey Download PDF

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Publication number
CN111712092B
CN111712092B CN202010508351.9A CN202010508351A CN111712092B CN 111712092 B CN111712092 B CN 111712092B CN 202010508351 A CN202010508351 A CN 202010508351A CN 111712092 B CN111712092 B CN 111712092B
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China
Prior art keywords
block
fixedly connected
fixed
sleeve
fixing
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CN202010508351.9A
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Chinese (zh)
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CN111712092A (en
Inventor
唐兆民
王玉玲
石强
马卓群
张耀宗
李朝阳
王璇
史同建
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Longdong University
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Longdong University
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/06Hermetically-sealed casings
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827Portable transceivers
    • H04B1/3888Arrangements for carrying or protecting transceivers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sealing Devices (AREA)

Abstract

The invention discloses a communication equipment dustproof device for geographical measurement, and relates to the field of geographical measurement. This communications facilities dust keeper for geographical measurement, including the communicator, fixed frame and fixed strip, the front of communicator is provided with the speaker, fixed frame left and right sides is the first fixed block of fixedly connected with and second fixed block respectively, the first sleeve of the equal fixedly connected with in the back of first fixed block and second fixed block, the fixedly connected with threaded rod on the first telescopic inner wall, threaded connection has the second sleeve on the surface of threaded rod, the telescopic end connection of second has drive assembly, the front of fixed frame is rotated through the round pin axle and is connected with sealed lid, one side fixedly connected with third fixed block of sealed lid, and be provided with fixed subassembly between second fixed block and the third fixed block. This communications facilities dust keeper for geographical measurement for sand blown by the wind and some dust can't block up the speaker, have played effectual dustproof and protective effect to the speaker.

Description

Communication equipment dust keeper for geographical survey
Technical Field
The invention relates to the technical field of geographic measurement, in particular to a dustproof device of communication equipment for geographic measurement.
Background
In the geographic survey and drawing, the imagination observed is described by data according to a certain rule during measurement, objects are quantitatively described, the measured quantity and the standard quantity with a measurement unit are compared on numerical values so as to determine the ratio of the measured quantity and the standard quantity, and the existing characteristics and the boundary of the ground reflect the shape and the position information of the ground in a measurement mode on the basis of a computer technology, a photoelectric technology, a network communication technology and a spatial information science during the survey and drawing.
Communication needs to be carried out between the staff at the in-process of measurement, if use the cell-phone repeatedly then very loaded down with trivial details, consequently generally can use the communication intercom, but geographical measurement is generally all open-air, and when being in the great position of sand blown by the wind, sand blown by the wind and some dust are easy to block up the speaker of communication intercom very much, lead to the sound of speaker to diminish easily, lead to the damage of speaker even, therefore we have proposed communication equipment dust keeper for geographical measurement.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention discloses a dustproof device of communication equipment for geographic measurement, which aims to solve the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the dustproof device for the communication equipment for the geographical measurement comprises a communication machine, a fixing frame and a fixing strip, wherein a loudspeaker is arranged on the front side of the communication machine, the fixing frame and the fixing strip are tightly attached to the front side and the back side of the communication machine respectively, the fixing frame is arranged around the loudspeaker, a first fixing block and a second fixing block are fixedly connected to the left side and the right side of the fixing frame respectively, a first sleeve is fixedly connected to the back sides of the first fixing block and the second fixing block, a threaded rod is fixedly connected to the inner wall of the first sleeve, a second sleeve is connected to the outer surface of the threaded rod in a threaded manner, the outer surface of the second sleeve is attached to the inner wall of the first sleeve, and the end portion of the second sleeve penetrates through the front side of the fixing strip and extends towards the inside of the fixing strip and is connected with a transmission assembly;
the front of the fixed frame is rotatably connected with a sealing cover through a pin shaft, one side of the sealing cover is fixedly connected with a third fixed block, and a fixed assembly is arranged between the second fixed block and the third fixed block.
Preferably, the joint of the back of the fixing frame and the front of the communication machine is provided with an anti-skid rubber pad.
Preferably, a sealing gasket is arranged at the joint of the back surface of the sealing cover and the front surface of the fixing frame.
Preferably, a bearing is arranged at the joint of the second sleeve and the fixing strip, and the bearing is fixedly connected with the front surface of the fixing strip.
Preferably, the transmission assembly comprises a transmission rod, two first bevel gears are fixedly connected to the outer surface of the transmission rod, a second bevel gear is fixedly connected to the end of the second sleeve, and the two second bevel gears are respectively in meshed connection with the two first bevel gears.
Preferably, the end of the driving rod passes through the side wall of the fixing strip and extends outwards, and a knob is fixedly connected with the end of the driving rod.
Preferably, the fixing component comprises a fixture block, the fixture block is fixedly connected to the back of the third fixing block, a clamping groove is formed in the front of the second fixing block, one side, far away from the third fixing block, of the fixture block is attached to the inner wall of the clamping groove, a supporting block is fixedly connected to the side wall of the second fixing block, a sliding plate is slidably connected to the inner wall of the supporting block, a limiting block and a pull rod are fixedly connected to two sides of the sliding plate respectively, a limiting groove is formed in the side wall of the fixture block, the end portion of the limiting block penetrates through the outer wall of the second fixing block and extends towards the inside of the clamping groove and is connected to the limiting groove in a clamped mode, an elastic part is sleeved on the outer surface of the pull rod, and two ends of the elastic part are fixedly connected to the side wall of the sliding plate and the inner wall of the supporting block respectively.
Preferably, the end of the pull rod passes through the outer wall of the supporting block, extends outwards and is fixedly connected with a pull ring.
The invention discloses a dustproof device of communication equipment for geographical measurement, which has the following beneficial effects:
1. this communications facilities dust keeper for geographical measurement, fixed frame through the setting, sealed lid, the second fixed block, third fixed block and fixed subassembly, when using the communication machine, open fixed subassembly and rotate sealed lid and make it break away from with fixed frame, can exchange with other staff through the speaker this moment, when not using, make sealed lid and fixed frame closely laminate through closing fixed subassembly, the fixed frame is laminated with the front of communication machine mutually simultaneously, and set up around the speaker, thereby make sand blown by the wind and some dust can't block up the speaker, the effect of effectual dustproof and protection has been played to the speaker.
2. The dustproof device of the communication equipment for geographic measurement comprises a first sleeve, a threaded rod, a second sleeve, a fixing strip and a transmission assembly, can drive the two second sleeves to rotate simultaneously, the second sleeves rotate to be screwed out relative to the threaded rod, thereby enabling the second sleeve to be screwed out of the first sleeve, increasing the distance between the fixed strip and the fixed frame, then the communication machine is placed between the fixing strip and the fixing frame is positioned around the loudspeaker, then the two second sleeves are rotated reversely through the transmission component, the second sleeves can be driven to be screwed into the first sleeves by reversely repeating the actions, the distance between the fixing strip and the fixing frame is reduced until the front and back surfaces of the communication machine are tightly attached to the fixing strip and the fixing frame, the effective fixing effect is achieved, the fixed frame and the fixed strip can be installed when dust is needed, and the fixed frame and the fixed strip can be detached when dust is not needed.
3. This communication equipment dust keeper for geographical measurement through the anti-skidding rubber pad that sets up, has increased the frictional force between fixed frame and the communication machine for fixed frame is inseparabler with the laminating of communication machine, has played certain guard action to the communication machine simultaneously, and through the sealed pad that sets up, has increased the sealed effect between sealed lid and the fixed frame, thereby has played better dustproof effect to the speaker.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a portion of the present invention;
FIG. 3 is a schematic view of a portion of the present invention;
FIG. 4 is a schematic structural view of the transmission assembly of the present invention;
FIG. 5 is a schematic view of the construction of the junction of the first sleeve and the second sleeve of the present invention;
FIG. 6 is an enlarged view of portion A of FIG. 3 according to the present invention;
fig. 7 is a schematic structural view of the fixing assembly of the present invention.
In the figure: 1. a communication machine; 101. a speaker; 2. a fixing frame; 201. a first fixed block; 202. a second fixed block; 203. a first sleeve; 204. a threaded rod; 205. a second sleeve; 206. a sealing cover; 207. a third fixed block; 208. an anti-skid rubber pad; 209. a gasket; 3. a fixing strip; 301. a transmission rod; 302. a first bevel gear; 303. a second bevel gear; 304. a knob; 4. a clamping block; 401. a card slot; 402. a support block; 403. a slide plate; 404. a limiting block; 405. a pull rod; 406. a limiting groove; 407. an elastic member; 408. and (4) a pull ring.
Detailed Description
The embodiment of the invention discloses a dustproof device of communication equipment for geographic measurement, which comprises a communication machine 1, a fixed frame 2 and a fixed strip 3, wherein the front surface of the communication machine 1 is provided with a loudspeaker 101, the fixed frame 2 and the fixed strip 3 are respectively tightly attached to the front surface and the back surface of the communication machine 1, the fixed frame 2 is arranged around the loudspeaker 101, the left side and the right side of the fixed frame 2 are respectively and fixedly connected with a first fixed block 201 and a second fixed block 202, the back surfaces of the first fixed block 201 and the second fixed block 202 are respectively and fixedly connected with a first sleeve 203, the inner wall of the first sleeve 203 is fixedly connected with a threaded rod 204, the outer surface of the threaded rod 204 is in threaded connection with a second sleeve 205, the outer surface of the second sleeve 205 is attached to the inner wall of the first sleeve 203, the end part of the second sleeve 205 penetrates through the front surface of the fixed strip 3 and extends towards the inside of the fixed strip 3 and is connected with a transmission component, the two second sleeves 205 can be driven to rotate simultaneously through the arranged first sleeve 203, the threaded rod 204, the second sleeve 205, the fixed strip 3 and the transmission component, the second sleeve 205 rotates and outwards screws out relative to the threaded rod 204, so that the second sleeve 205 screws out from the first sleeve 203, the distance between the fixed strip 3 and the fixed frame 2 is increased, then the communication machine 1 is placed between the fixed strip 3 and the fixed frame 2, the fixed frame 2 is positioned around the loudspeaker 101, then the two second sleeves 205 are reversely rotated through the transmission component, the second sleeve 205 can be driven to screw into the first sleeve 203 by reversely repeating the actions, the distance between the fixed strip 3 and the fixed frame 2 is reduced, until the front and back sides of the communication machine 1 are tightly attached to the fixed strip 3 and the fixed frame 2, an effective fixing effect is achieved, the fixed frame 2 and the fixed strip 3 can be installed when dust is required, the fixed frame 2 and the fixed strip 3 can be detached when dust prevention is not needed.
The front of fixed frame 2 is connected with sealed lid 206 through the round pin axle rotation, one side fixedly connected with third fixed block 207 of sealed lid 206, and be provided with fixed subassembly between second fixed block 202 and the third fixed block 207, fixed frame 2 through the setting, sealed lid 206, second fixed block 202, third fixed block 207 and fixed subassembly, when using communication machine 1, open fixed subassembly and rotate sealed lid 206 and make it break away from with fixed frame 2, can exchange with other staff through speaker 101 this moment, when not using, make sealed lid 206 closely laminate with fixed frame 2 through closing fixed subassembly, fixed frame 2 laminates with communication machine 1's front simultaneously, and set up around speaker 101, thereby make sand blown by the wind and some dust can't block up speaker 101, effectual dustproof and the effect of protection has been played speaker 101.
The back of fixed frame 2 and the front junction of communication machine 1 are provided with anti-skidding rubber pad 208, through the anti-skidding rubber pad 208 that sets up, have increased the frictional force between fixed frame 2 and the communication machine 1 for fixed frame 2 is inseparabler with the laminating of communication machine 1, has played certain guard action to communication machine 1 simultaneously.
The back of sealed lid 206 is provided with sealed the pad 209 with the front junction of fixed frame 2, through the sealed pad 209 that sets up, has increased the sealed effect between sealed lid 206 and the fixed frame 2 to better dustproof effect has been played speaker 101.
The joint of the second sleeve 205 and the fixing strip 3 is provided with a bearing, and the bearing is fixedly connected with the front surface of the fixing strip 3.
The transmission assembly comprises a transmission rod 301, two first bevel gears 302 are fixedly connected to the outer surface of the transmission rod 301, a second bevel gear 303 is fixedly connected to the end portion of the second sleeve 205, the two second bevel gears 303 are respectively meshed with the two first bevel gears 302, the end portion of the transmission rod 301 penetrates through the side wall of the fixing strip 3 and extends outwards and is fixedly connected with a knob 304, when the knob 304 is rotated, the transmission rod 301 is driven to rotate, the first bevel gear 302 starts to rotate, the second bevel gear 303 meshed with the first bevel gear is driven to rotate, and meanwhile the second sleeve 205 is driven to rotate.
The fixing component comprises a fixture block 4, the fixture block 4 is fixedly connected to the back of a third fixing block 207, a clamping groove 401 is formed in the front of a second fixing block 202, one side, far away from the third fixing block 207, of the fixture block 4 is attached to the inner wall of the clamping groove 401, a supporting block 402 is fixedly connected to the side wall of the second fixing block 202, a sliding plate 403 is slidably connected to the inner wall of the supporting block 402, a limiting block 404 and a pull rod 405 are respectively and fixedly connected to two sides of the sliding plate 403, a limiting groove 406 is formed in the side wall of the fixture block 4, the end portion of the limiting block 404 penetrates through the outer wall of the second fixing block 202 to extend towards the inside of the clamping groove 401 and is clamped in the limiting groove 406, an elastic member 407 is sleeved on the outer surface of the pull rod 405, two ends of the elastic member 407 are respectively and fixedly connected to the side wall of the sliding plate and the inner wall of the supporting block 402, the end portion of the pull rod 405 penetrates through the outer wall of the supporting block 402 and extends towards the outside and is fixedly connected with a pull ring 408, the pull ring 408 is pulled outwards, so that the pull rod 405 and the sliding plate 403 are driven to slide outwards, the limiting block 404 is driven to move towards the direction of the supporting block 402 until the limiting block is separated from the limiting groove 406, at the moment, the third fixing block 207 can be rotated to separate the fixture block 4 from the clamping groove 401, so that the sealing cover 206 is separated from the fixing frame 2, at the moment, communication can be carried out with other workers through the loudspeaker 101, when the loudspeaker 101 is not used, the pull ring 408 is pulled outwards to repeat the actions, the elastic element 407 is compressed to be in a force accumulation compression state, then the sealing cover 206 is rotated to be attached to the fixing frame 2, the fixture block 4 enters the clamping groove 401, one side of the fixture block 4 far away from the third fixing block 207 is attached to the inner wall of the clamping groove 401, at the moment, the elastic element 407 compressed by previous force accumulation of the pull ring 408 is loosened to rebound, the limiting block 404 is driven to enter the limiting groove 406, so that the positions of the second fixing block 202 and the third fixing block 207 are fixed, and then make sealed lid 206 and fixed frame 2 closely laminate, played effectual dustproof and the effect of protection to speaker 101.
The working principle is as follows: in the using process, firstly, the knob 304 is rotated to drive the transmission rod 301 to rotate, so that the first bevel gear 302 starts to rotate, and further the second bevel gear 303 meshed with the first bevel gear is driven to rotate, and simultaneously the second sleeve 205 is driven to rotate, the second sleeve 205 rotates to outwards screw out relative to the threaded rod 204, so that the second sleeve 205 is screwed out from the first sleeve 203, the distance between the fixed strip 3 and the fixed frame 2 is increased, then the communication machine 1 is placed between the fixed strip 3 and the fixed frame 2, the fixed frame 2 is positioned around the loudspeaker 101, then the two second sleeves 205 are reversely rotated through the transmission component, the second sleeve 205 can be driven to be screwed into the first sleeve 203 by reversely repeating the actions, the distance between the fixed strip 3 and the fixed frame 2 is reduced, until the front side and the back side of the communication machine 1 are tightly attached to the fixed strip 3 and the fixed frame 2, the fixing frame 2 and the fixing strip 3 can be installed when dust is required, and the fixing frame 2 and the fixing strip 3 can be detached when dust is not required;
when the communication machine 1 is used, the pull ring 408 is pulled outwards, so that the pull rod 405 and the sliding plate 403 are driven to slide outwards, the limiting block 404 is driven to move towards the supporting block 402 until the limiting block is separated from the limiting groove 406, at the moment, the third fixing block 207 can be rotated to separate the fixture block 4 from the clamping groove 401, so that the sealing cover 206 is separated from the fixing frame 2, at the moment, communication can be carried out with other workers through the loudspeaker 101, when the loudspeaker 101 is not used, the pull ring 408 is pulled outwards to repeat the actions, meanwhile, the elastic element 407 is compressed to be in a force accumulation compression state, then the sealing cover 206 is rotated to be attached to the fixing frame 2, meanwhile, the fixture block 4 enters the clamping groove 401, one side of the fixture block 4 far away from the third fixing block 207 is attached to the inner wall of the clamping groove 401, at the moment, the elastic element 407 compressed by previous force accumulation rebounds after the pull ring 408 is released, so that the limiting block 404 enters the limiting groove 406, thereby fix the position of second fixed block 202 and third fixed block 207, and then make sealed lid 206 closely laminate with fixed frame 2, fixed frame 2 laminates with the front of communication machine 1 simultaneously, and sets up around speaker 101 to make sand blown by the wind and some dust can't block up speaker 101, played effectual dustproof and protection's effect to speaker 101.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. Geographic measurement uses communications facilities dust keeper, including communication machine (1), fixed frame (2) and fixed strip (3), its characterized in that: the front of the communication machine (1) is provided with a loudspeaker (101), the fixed frame (2) and the fixed strip (3) are respectively tightly attached to the front and the back of the communication machine (1), the fixed frame (2) is arranged around the loudspeaker (101), the left side and the right side of the fixed frame (2) are respectively and fixedly connected with a first fixed block (201) and a second fixed block (202), the back surfaces of the first fixing block (201) and the second fixing block (202) are fixedly connected with a first sleeve (203), the inner wall of the first sleeve (203) is fixedly connected with a threaded rod (204), a second sleeve (205) is connected with the outer surface of the threaded rod (204) in a threaded manner, and the outer surface of the second sleeve (205) is jointed with the inner wall of the first sleeve (203), the end part of the second sleeve (205) penetrates through the front surface of the fixing strip (3), extends towards the inside of the fixing strip (3) and is connected with a transmission assembly;
the front surface of the fixed frame (2) is rotatably connected with a sealing cover (206) through a pin shaft, one side of the sealing cover (206) is fixedly connected with a third fixed block (207), and a fixed assembly is arranged between the second fixed block (202) and the third fixed block (207);
the fixing assembly comprises a fixture block (4), the fixture block (4) is fixedly connected to the back of a third fixing block (207), a clamping groove (401) is formed in the front of the second fixing block (202), one side, far away from the third fixing block (207), of the fixture block (4) is attached to the inner wall of the clamping groove (401), a supporting block (402) is fixedly connected to the side wall of the second fixing block (202), a sliding plate (403) is connected to the inner wall of the supporting block (402) in a sliding mode, a limiting block (404) and a pull rod (405) are fixedly connected to the two sides of the sliding plate (403) respectively, a limiting groove (406) is formed in the side wall of the fixture block (4), the end portion of the limiting block (404) penetrates through the outer wall of the second fixing block (202) to extend towards the inside of the clamping groove (401) and is clamped in the limiting groove (406), and an elastic element (407) is sleeved on the outer surface of the pull rod (405), and two ends of the elastic element (407) are respectively and fixedly connected to the side wall of the sliding plate (403) and the inner wall of the supporting block (402).
2. The dustproof device for communication equipment for geographical measurement according to claim 1, wherein: and an anti-skid rubber pad (208) is arranged at the joint of the back surface of the fixed frame (2) and the front surface of the communication machine (1).
3. The dustproof device for communication equipment for geographical measurement according to claim 1, wherein: and a sealing gasket (209) is arranged at the joint of the back surface of the sealing cover (206) and the front surface of the fixed frame (2).
4. The dustproof device for communication equipment for geographical measurement according to claim 1, wherein: and a bearing is arranged at the joint of the second sleeve (205) and the fixed strip (3), and the bearing is fixedly connected with the front surface of the fixed strip (3).
5. The dustproof device for communication equipment for geographical measurement according to claim 1, wherein: the transmission assembly comprises a transmission rod (301), two first bevel gears (302) are fixedly connected to the outer surface of the transmission rod (301), a second bevel gear (303) is fixedly connected to the end portion of the second sleeve (205), and the two second bevel gears (303) are respectively in meshed connection with the two first bevel gears (302).
6. The dustproof device for communication equipment for geographical measurement according to claim 5, wherein: the end part of the transmission rod (301) penetrates through the side wall of the fixing strip (3), extends outwards and is fixedly connected with a knob (304).
7. The dustproof device for communication equipment for geographical measurement according to claim 1, wherein: the end of the pull rod (405) passes through the outer wall of the supporting block (402), extends outwards and is fixedly connected with a pull ring (408).
CN202010508351.9A 2020-07-15 2020-07-15 Communication equipment dust keeper for geographical survey Active CN111712092B (en)

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Application Number Priority Date Filing Date Title
CN202010508351.9A CN111712092B (en) 2020-07-15 2020-07-15 Communication equipment dust keeper for geographical survey

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Application Number Priority Date Filing Date Title
CN202010508351.9A CN111712092B (en) 2020-07-15 2020-07-15 Communication equipment dust keeper for geographical survey

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CN111712092B true CN111712092B (en) 2021-09-07

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CN208046901U (en) * 2018-04-28 2018-11-02 沭阳明华电子科技有限公司 A kind of dust-proof loud speaker for flat-type speaker
CN208385924U (en) * 2018-06-01 2019-01-15 四川广旺能源发展(集团)有限责任公司信息分公司 A kind of mine ground circuit control box

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CN207706548U (en) * 2017-11-22 2018-08-07 重庆吉鸥电子科技有限公司 A kind of split structure shell for automobile electric control system
CN207958614U (en) * 2018-03-19 2018-10-12 江西嘉丰纺织有限公司 A kind of air-jet loom heald frame height adjusting auxiliary device
CN208522740U (en) * 2018-06-15 2019-02-19 深圳市和诺通讯电子有限公司 A kind of portable intercom with loudspeaker dust guard
CN208522741U (en) * 2018-06-15 2019-02-19 深圳市和诺通讯电子有限公司 A kind of intercom with detachable dustproof construction
CN209991122U (en) * 2019-05-28 2020-01-24 深圳市晨旭通科技有限公司 POE power convenient to dismantle
CN110880941A (en) * 2019-11-20 2020-03-13 徐州立讯信息科技有限公司 Dustproof mechanism for communication equipment

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Publication number Priority date Publication date Assignee Title
CN208046901U (en) * 2018-04-28 2018-11-02 沭阳明华电子科技有限公司 A kind of dust-proof loud speaker for flat-type speaker
CN208385924U (en) * 2018-06-01 2019-01-15 四川广旺能源发展(集团)有限责任公司信息分公司 A kind of mine ground circuit control box

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