CN111934129B - Device of a wireless communication network - Google Patents
Device of a wireless communication network Download PDFInfo
- Publication number
- CN111934129B CN111934129B CN202010991482.7A CN202010991482A CN111934129B CN 111934129 B CN111934129 B CN 111934129B CN 202010991482 A CN202010991482 A CN 202010991482A CN 111934129 B CN111934129 B CN 111934129B
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- fixing
- cover
- lower cover
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- rod
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/02—Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5202—Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/627—Snap or like fastening
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
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- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses a wireless communication network device which comprises an upper cover, wherein the inner edge of the upper cover is provided with an upper lip, the middle part of the upper cover is hollowed, the hollowed part is provided with a convex lip, and the convex lip is provided with an inner cover. The inner edge of the lower cover is provided with a lower lip, the lower lip is matched with the upper lip for installation, the lower cover is provided with a notch, the rotary cover plate is arranged in the notch, and the lower cover is also provided with a heat dissipation hole. The rotary cover plate is provided with a fixing part, the lower cover is provided with a fixing groove, the fixing part is matched with the fixing groove, the fixing seat is arranged in the lower cover, and the fixing part is fixed on the fixing seat through a first bolt. A hub assembly is also provided. The wireless communication network equipment has the advantages of simple structure, convenient processing and quick assembly. The heat dissipation is convenient, can effectually block dust and steam.
Description
Technical Field
The present invention relates to the field of communication network equipment technologies, and in particular, to a wireless communication network device.
Background
Wireless communication devices include a variety of devices, wherein a hub is a commonly used device that connects multiple ethernet twisted pairs or a collection of optical fibers over the same physical medium. The existing hub structure is relatively single, and is often used for concentrating all nodes on a node which is centered on the hub.
However, the used concentrator has the same structure in different places, and in public areas such as hotels and office places, potential safety hazards exist when the common concentrator is used, and phenomena such as loosening, stealing, and artificially pulling out data lines occur. Dust can be generated after the port is used, meanwhile, some ports are not used, and the phenomenon that the port enters dust in the unused stage can occur, so that the later use of the port is invalid.
Patent No. 201720454900.2 discloses an improved concentrator, which is improved against dust and water, but is bulky and inconvenient to use. And is inconvenient to overlap-mount.
Patent No. 201710824516.1 discloses a hub which is easy to install, and the main problem set forth in this document is installation, but installation at installation is single and inconvenient to use in a variety of scenarios.
Disclosure of Invention
In order to solve the above-mentioned drawbacks of the prior art, the present invention provides a device of a wireless communication network.
The technical scheme of the invention is realized as follows:
an apparatus of a wireless communication network, comprising,
the inner edge of the upper cover is provided with an upper lip, the middle part of the upper cover is hollowed to form a hollowed part, the hollowed part is provided with a convex lip, the convex lip is provided with an inner cover, and the inner cover is hinged with a rotary cover plate;
a lower cover, wherein the inner edge of the lower cover is provided with a lower lip, the lower lip and the upper lip are installed in a matching way, the lower cover is provided with a notch, the rotary cover plate is arranged in the notch, the inner part of the lower cover is also provided with a heat dissipation hole, wherein,
the notch is provided with a first half notch, the lower end of the rotary cover plate is provided with a second half notch, and the first half notch and the second half notch form a whole circle;
the rotary cover plate is provided with a fixing part, the lower cover is provided with a fixing groove, the fixing part is arranged in the fixing groove in a matched mode, a fixing seat is arranged inside the lower cover, and the fixing part is fixed on the fixing seat through a first bolt;
a hub assembly mounted in the lower cover, the hub assembly having an output thereon.
In the device of the wireless communication network, the upper cover is internally provided with a mounting part, the mounting part is provided with a mounting inclined plane, and the lower end of the mounting inclined plane is provided with a dismounting opening;
the lower cover is internally provided with a fixed piece, and the fixed piece is provided with a guide inclined plane;
the installation inclined plane is parallel to the guide inclined plane.
In the wireless communication network device of the invention, the lower cover is provided with a disassembly groove which penetrates from the inside, and the disassembly groove is positioned at the right lower end of the disassembly port.
In the device of the wireless communication network of the present invention, the upper cover has a first fixing bar thereon;
the bottom of the lower cover is provided with a second fixing rod;
the second fixing rod is provided with a fixing plate, the middle of the fixing plate is provided with an annular hole, and the second fixing rod is arranged in the annular hole.
In the wireless communication network device of the invention, one end of the fixing plate is a plane, the other end of the fixing plate is an arc surface, one end of the arc surface is provided with a convex part, and the lower cover is provided with a concave part matched with the convex part;
the fixing plate is provided with two mounting holes.
In the device of the wireless communication network of the present invention, the lower cover further includes a support portion for placing the fixing plate thereon.
In the wireless communication network device, the upper cover is internally provided with a limiting groove, the limiting groove is internally provided with a positioning groove, the limiting groove is internally provided with a stop block, the stop block is provided with a positioning rod, the positioning rod is sleeved with a spring, the other end of the spring is arranged in the positioning groove, the stop block is also provided with a push rod, the push rod is provided with a pushing part, the upper cover is provided with a sliding groove, the pushing part is arranged in the sliding groove, the front end of the push rod is provided with a limiting block, the upper cover is also provided with a first limiting hole for placing the limiting block, the inner cover is provided with a second limiting hole, and the limiting block is arranged in the second limiting hole through a second bolt.
In the device of the wireless communication network, the inner cover is provided with a fixing hole, the upper cover is provided with a threaded hole and a moving hole, the fixing hole is internally provided with a fixing rod, the rear end of the fixing rod is provided with a ball head, the fixing rod is connected with the ball head through a connecting part, the threaded hole is internally provided with a threaded rod, the threaded rod is provided with a ball head part, the ball head is matched and placed in the ball head part, the middle of the ball head and the ball head part is hinged through a rotating shaft, and the ball head part are placed in the moving hole.
The equipment of the wireless communication network for implementing the invention has the following beneficial effects: the wireless communication network equipment has the advantages of simple structure, convenient processing and quick assembly. The heat dissipation is convenient, can effectually block dust and steam.
Can play the effect of theftproof to the concentrator after the equipment to the line is inserted to the carrying on that this structure can be quick, then need dismantle the inner cup when the stub is pulled out to needs, makes the time of dismantling needs longer, can also make the input not pulled out the effect easily.
And the structure also has a plurality of mounting modes, and can be mounted in an overlapping mode, a single mounting mode and a plane mounting mode. Can deal with different site environments.
Drawings
FIG. 1 is a schematic diagram of an apparatus of a wireless communication network according to the present invention;
FIG. 2 is a top view of a device of the wireless communication network of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a partial enlarged view of FIG. 3 at B;
FIG. 5 is an enlarged view of a portion of FIG. 3 at C;
fig. 6 is an exploded view of the device architecture of the wireless communication network of the present invention;
fig. 7 is a schematic view of the inner lid structure in the device of the wireless communication network of the present invention;
fig. 8 is a schematic diagram of the structure of the upper cover in the device of the wireless communication network according to the present invention;
fig. 9 is a schematic view of a lower cover structure in the device of the wireless communication network of the present invention;
fig. 10 is a schematic view of another directional structure of a lower cover in the device of the wireless communication network according to the present invention;
fig. 11 is a schematic view of a fixed board structure in the device of the wireless communication network according to the present invention;
FIG. 12 is a schematic view of a threaded rod mounting arrangement in a device of the wireless communication network of the present invention;
fig. 13 is a schematic view of a stopper mounting structure in the device of the wireless communication network of the present invention;
fig. 14 is a reference diagram of the usage status of the devices of the wireless communication network of the present invention;
fig. 15 is a reference diagram of another usage state of the devices of the wireless communication network of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 15, the apparatus of the wireless communication network of the present invention includes,
the inner cover comprises an upper cover 1, wherein an upper lip 2 is arranged on the inner edge of the upper cover 1, a hollow part is formed in the middle of the upper cover 1 in a hollow mode, a convex lip 3 is arranged on the hollow part, an inner cover 4 is arranged on the convex lip 3, and the convex lip 3 is used for supporting the inner cover 4. A rotary cover plate 5 is hinged on the inner cover 4.
A lower cover 6, the inner edge of the lower cover 6 is provided with a lower lip 7, and the lower lip 7 is matched with the upper lip 2 for installation. The lower cover 6 is provided with a gap 8, and the rotary cover plate 5 is arranged in the gap 8. The inside of the lower cover 6 is also provided with heat dissipation holes 9, and the heat dissipation holes 9 can effectively dissipate heat of the hub assembly 10 in the lower cover 6.
The notch 8 is provided with a first half notch 12, the lower end of the rotary cover plate 5 is provided with a second half notch 11, and the first half notch 12 and the second half notch 11 form a whole circle. The middle of the first half notch 12 and the second half notch 11 is used for placing a data line, and then the data line is fixed through the first half notch 12 and the second half notch 11. And this kind of structure can be effectual supports the data line, has guaranteed the end atress of data line for the end of data line and the firm connection of concentrator subassembly 10 can be firm.
The rotating cover plate 5 is provided with a fixing part 13, the lower cover 6 is provided with a fixing groove 14, the fixing part 13 is matched and placed in the fixing groove 14, the lower cover 6 is internally provided with a fixing seat 15, and the fixing part 13 is fixed on the fixing seat 15 through a first bolt 16. When the rotating cover plate 5 and the inner cover 4 need to be opened, the first bolt 16 on the side needs to be removed, then the rotating cover plate 5 is rotated, and then the inner cover 4 is removed through the rotating cover plate 5.
The hub assembly 10, the hub assembly 10 is installed in the lower cover 6, the hub assembly 10 has an output terminal 17, and an input terminal 18 is connected with the hub assembly 10 through the first half slot 12 and the second half slot 11. When it is desired to insert the input 18 into the hub assembly 10, the rotating cover 5 need only be opened. However, when the input end 18 needs to be taken down, the aperture of the notch 8 where the rotating cover plate 5 is located is small, so that the input end 18 can be inserted only conveniently, the input end 18 is not taken out easily, and the inner cover 4 needs to be opened when the input end 18 needs to be taken out, so that the disassembling process is increased, the input end 18 is not taken out easily, the input end 18 is not pulled out easily to a certain extent, and the input end 18 is protected. To ensure that the inner lid 4 is not easily opened, a protective structure is added.
As shown in fig. 4, the upper cover 1 has a limiting groove 19 therein, the limiting groove 19 has a positioning groove 20 therein, the limiting groove 19 has a stopper 21 therein, the stopper 21 has a positioning rod 22 thereon, the positioning rod 22 is sleeved with a spring 23, the other end of the spring 23 is disposed in the positioning groove 20, the stopper 21 also has a push rod 24 thereon, and the push rod 24 can be installed on the stopper 21 in a threaded manner. The push rod 24 is provided with a push part 25, the upper cover 1 is provided with a sliding groove 26, the push part 25 is arranged in the sliding groove 26, the front end of the push rod 24 is provided with a limit block 27, and the upper cover 1 is further provided with a first limit hole 28 for placing the limit block 27. When the pushing portion 25 slides toward the stopper 21, the spring 23 is compressed, and the stopper 27 enters the first stopper hole 28. The inner lid 4 has a second limiting hole 29, and the limiting block 27 is mounted in the second limiting hole 29 through a second bolt 30. The second limiting hole 29 is formed in the second limiting hole 29 when the spring 23 is in a natural state, and the limiting block 27 is located in the second limiting hole 29.
When the inner lid 4 needs to be opened, the second bolt 30 needs to be taken out of the second limiting hole 29, and then the pushing portion 25 is pushed toward one end of the spring 23, so that the limiting block 27 enters the first limiting hole 28 in the upper lid 1 from the second limiting hole 29, and then the end of the inner lid 4 is lifted.
As shown in FIG. 5, the inner lid 4 has a fixing hole 31, the upper lid 1 has a threaded hole 32 and a moving hole 33, the fixing hole 31 has a fixing rod 34 therein, the fixing rod 34 has a ball 35 at the rear end thereof, the fixing rod 34 is connected to the ball 35 through a connecting portion 36, the threaded hole 32 has a threaded rod 37 therein, the threaded rod 37 has a ball head 38 thereon, the ball 35 is fittingly disposed in the ball head 38, the ball 35 is hinged to the ball head 38 through a rotating shaft 39, and the ball 35 and the ball head 38 are disposed in the moving hole 33. The rotation axis 39 enables the ball head 35 and the ball head 38 to rotate along the rotation axis 39.
When the other end of the inner lid 4 is lifted, the ball head 35 can be rotated in the ball head portion 38, and the fixing rod 34 is disengaged from the fixing hole 31, so that the inner lid 4 can be opened.
In order to enable the stable installation of the upper and lower covers 1 and 6, a special tool is required for opening. The upper cover 1 has a mounting member 40 inside, the mounting member 40 has a mounting slope 41 thereon, and the mounting slope 41 has a removal opening 42 at a lower end thereof. The lower cover 6 has a fixing member 43 inside, and the fixing member 43 has a guide slope 44 thereon. The installation slope 41 is parallel to the guide slope 44 so that the installation slope 41 can smoothly fall on the guide slope 44 and then be guided by the guide slope 44, thereby fixing the installation member 40, that is, the upper cover 1, by the fixing member 43.
When the upper cover 1 and the lower cover 6 are easily separated from each other, the lower cover 6 is provided with a removal groove 45 penetrating from the inside, and the removal groove 45 is located right below the removal opening 42.
When needing to dismantle upper cover 1 and lower cover 6, only need insert a thinner iron sheet and dismantle in the groove 45, then put the front end in dismantling mouthful 42 again, the iron sheet rear end is broken off with the fingers and thumb towards lower cover 6 mid portion, moves the side of installed part 40 to lower cover 6 to make installed part 40 break away from mounting 43, alright with upper cover 1 and lower cover 6 separation.
The upper cover 1 is provided with a first fixing rod 49, the bottom of the lower cover 6 is provided with a second fixing rod 50, the second fixing rod 50 is provided with a fixing plate 51, the middle of the fixing plate 51 is provided with an annular hole 52, and the second fixing rod 50 is arranged in the annular hole 52. The first fixing lever 49 and the second fixing lever 50 are both detachable screws.
One end of the fixing plate 51 is a plane, the other end is a cambered surface, one end of the cambered surface is provided with a convex part 53, and the lower cover 6 is provided with a concave part 54 matched with the convex part 53. The fixing plate 51 has two mounting holes 55. The lower cover 6 further includes a support portion 56 for placing the fixing plate 51 thereon.
As shown in fig. 14, when the overlapping installation is required, the first fixing rod 49 is removed, and the flat end of the fixing plate 51 is placed on the next upper cover 1, and then inserted into the annular hole 52 through the first fixing rod 49. The convex portion 53 on the arc surface is inserted into the concave portion 54, so that the two hub devices are assembled together, and the gap between the two hub devices can be used for heat dissipation. It is also convenient to open the inner lid 4 and the rotary cover plate 5. The fixing plate 51 of the lower end cap 6 is received in the supporting portion 56.
Meanwhile, as shown in fig. 15, the fixing plate 51 can be unfolded to be parallel to the lower cover 6, so that the fixing plate can be fixed on a wall or a desk, and the fixing plate is convenient to install, diversified in structural installation and capable of being used in different occasions.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. An apparatus of a wireless communication network, comprising,
the inner edge of the upper cover is provided with an upper lip, the middle part of the upper cover is hollowed to form a hollowed part, the hollowed part is provided with a convex lip, the convex lip is provided with an inner cover, and the inner cover is hinged with a rotary cover plate;
a lower cover, wherein the inner edge of the lower cover is provided with a lower lip, the lower lip and the upper lip are installed in a matching way, the lower cover is provided with a notch, the rotary cover plate is arranged in the notch, the inner part of the lower cover is also provided with a heat dissipation hole, wherein,
the notch is provided with a first half notch, the lower end of the rotary cover plate is provided with a second half notch, and the first half notch and the second half notch form a whole circle;
the rotary cover plate is provided with a fixing part, the lower cover is provided with a fixing groove, the fixing part is arranged in the fixing groove in a matched mode, a fixing seat is arranged inside the lower cover, and the fixing part is fixed on the fixing seat through a first bolt;
a hub assembly mounted in the lower cover, the hub assembly having an output port thereon, wherein,
the upper cover is internally provided with a mounting piece which is provided with a mounting inclined plane, the lower end of the mounting inclined plane is provided with a dismounting opening,
the lower cover is internally provided with a fixed piece, and the fixed piece is provided with a guide inclined plane;
the installation inclined plane is parallel to the guide inclined plane;
the lower cover is provided with a disassembly groove which is communicated from the inside and is positioned at the right lower end of the disassembly opening,
the upper cover is provided with a first fixing rod;
the bottom of the lower cover is provided with a second fixing rod;
the second fixing rod is provided with a fixing plate, the middle of the fixing plate is provided with an annular hole, and the second fixing rod is arranged in the annular hole.
2. The device of claim 1, wherein one end of the fixing plate is a plane, the other end of the fixing plate is a cambered surface, one end of the cambered surface is provided with a convex part, and the lower cover is provided with a concave part matched with the convex part;
the fixing plate is provided with two mounting holes.
3. The device of claim 1, further comprising a support portion for placing a fixing plate on the lower cover.
4. The wireless communication network device of claim 1, wherein the upper cover has a limiting groove therein, the limiting groove has a positioning groove therein, the limiting groove has a stopper therein, the stopper has a positioning rod thereon, the positioning rod is sleeved with a spring, the other end of the spring is disposed in the positioning groove, the stopper further has a push rod thereon, the push rod has a pushing portion thereon, the upper cover has a sliding groove thereon, the pushing portion is disposed in the sliding groove, the front end of the push rod has a limiting block, the upper cover further has a first limiting hole therein for disposing the limiting block, the inner cover has a second limiting hole thereon, and the limiting block is mounted in the second limiting hole through a second bolt.
5. The device of claim 1, wherein the inner cover has a fixing hole, the upper cover has a threaded hole and a moving hole, the fixing hole has a fixing rod therein, the fixing rod has a ball at a rear end thereof, the fixing rod is connected to the ball through a connecting portion, the threaded hole has a threaded rod therein, the threaded rod has a ball head thereon, the ball is fittingly disposed in the ball head, the ball head is hinged to the ball head through a rotating shaft, and the ball head are disposed in the moving hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010991482.7A CN111934129B (en) | 2020-09-21 | 2020-09-21 | Device of a wireless communication network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010991482.7A CN111934129B (en) | 2020-09-21 | 2020-09-21 | Device of a wireless communication network |
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| CN111934129A CN111934129A (en) | 2020-11-13 |
| CN111934129B true CN111934129B (en) | 2020-12-25 |
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| CN202010991482.7A Expired - Fee Related CN111934129B (en) | 2020-09-21 | 2020-09-21 | Device of a wireless communication network |
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| CN114583474B (en) * | 2022-03-09 | 2024-04-09 | 深圳蓄能发电有限公司 | Ground wire electromagnetic lock |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204258854U (en) * | 2014-12-11 | 2015-04-08 | 山东工商学院 | A kind of novel switch based on cavity heat radiation |
| CN204918823U (en) * | 2015-08-25 | 2015-12-30 | 深圳市联懋塑胶有限公司 | Digital product shell anchor clamps that can open fast |
| CN205258896U (en) * | 2015-12-18 | 2016-05-25 | Tcl家用电器（合肥）有限公司 | Board is controlled to washing machine , washing machine and buckle structure thereof |
| CN205566918U (en) * | 2016-04-12 | 2016-09-07 | 南京越祥科技有限公司 | Switch with good waterproof performance |
| US10512151B2 (en) * | 2018-01-26 | 2019-12-17 | Nanning Fugui Precision Industrial Co., Ltd. | Electronic device with self-regulated cooling to avoid hot-spot heating |
| CN209994504U (en) * | 2019-09-12 | 2020-01-24 | 洪晋夫 | Distributed switch |
| CN210143080U (en) * | 2019-09-20 | 2020-03-13 | 苏州丰凡电子科技有限公司 | Make things convenient for dustproof router of dismouting |
| CN210168062U (en) * | 2019-09-24 | 2020-03-20 | 深圳市欣维度信息技术有限公司 | Multifunctional switch |
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