CN112161153B - Fixing device of doorbell - Google Patents
Fixing device of doorbell Download PDFInfo
- Publication number
- CN112161153B CN112161153B CN202010887286.5A CN202010887286A CN112161153B CN 112161153 B CN112161153 B CN 112161153B CN 202010887286 A CN202010887286 A CN 202010887286A CN 112161153 B CN112161153 B CN 112161153B
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- fixing
- plate
- gear
- nut
- base
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Hinges (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a fixing device of a doorbell, belonging to the field of doorbell accessories and comprising a fixing frame, a fixing base and a fixing top plate, wherein the fixing top plate is arranged above the fixing base; the bottom of the fixed frame is provided with a baffle; a connecting plate is fixedly arranged on the outer side surface of the fixing frame, a connecting groove is formed in the fixing base, and the connecting plate is arranged in the connecting groove; the connecting device is characterized in that a blind hole penetrating through the connecting groove is formed in one side, provided with the connecting groove, of the fixing base, a connecting rod is installed in the blind hole of the fixing base, a connecting through hole corresponding to the connecting rod is formed in the connecting plate, and the connecting rod is installed in the connecting through hole. This is disclosed through setting up mount, unable adjustment base and fixed roof, places the doorbell in the mount, on the mount was fixed in unable adjustment base, unable adjustment roof installed in unable adjustment base's top, unable adjustment base installs on door or wall for the dismantlement work of doorbell becomes simple.
Description
Technical Field
The utility model belongs to doorbell accessory field, concretely relates to fixing device of doorbell.
Background
The doorbell is a household article commonly used, and along with the continuous development of present science and technology, the structure of doorbell is more and more complicated.
The mounting means of present doorbell is usually with the body casing snap-on of doorbell on the wall body, when the doorbell need clear up or maintenance change, the doorbell dismantlement is very difficult to dismantle the in-process damage doorbell easily.
Disclosure of Invention
To prior art's not enough, this disclosed aim at provides a fixing device of doorbell, has solved among the prior art problem that the doorbell dismantles inconveniently.
The purpose of the disclosure can be realized by the following technical scheme:
the utility model provides a fixing device of doorbell, includes mount, unable adjustment base and fixed roof, the fixed roof is installed in unable adjustment base's top, and the mount is installed on unable adjustment base.
And a baffle is arranged at the bottom of the fixed frame.
The outer side surface of the fixing frame is fixedly provided with a connecting plate, the fixing base is provided with a connecting groove, and the connecting plate is arranged in the connecting groove.
The connecting device is characterized in that a blind hole penetrating through the connecting groove is formed in one side, provided with the connecting groove, of the fixing base, a connecting rod is installed in the blind hole of the fixing base, a connecting through hole corresponding to the connecting rod is formed in the connecting plate, and the connecting rod is installed in the connecting through hole.
Further, one end of the connecting rod is provided with a guide inclined plane.
Furthermore, a nut mounting groove is formed in one side of the blind hole of the fixed base, a fixing nut is mounted in the nut mounting groove, an inner ring of the fixing nut is mounted on the connecting rod in a threaded fit mode, a first gear is fixedly mounted on an outer ring of the fixing nut, the fixing nut and the first gear are mounted in the nut mounting groove, and the fixing nut and the first gear can only rotate and cannot move in the nut mounting groove.
Further, a rack mounting groove is formed in the outer side face of the fixed base, a first rack is slidably mounted in the rack mounting groove, and the first rack is meshed with the first gear.
Furthermore, one side of the bottom end of the fixed top plate is fixedly connected with the first rack, and one side of the fixed top plate is provided with an opening.
Further, the bottom fixed mounting of mount has first fixed plate, is provided with first slot between the bottom of first fixed plate and mount, and the second slot has been seted up to unable adjustment base's inside bottom, and the top of second slot is the second fixed plate, and first fixed plate is installed in the second slot, and the second fixed plate is installed in first slot.
Furthermore, a rotating shaft mounting hole is formed in the second fixing plate, a rotating plate rotating shaft is rotatably mounted in the rotating shaft mounting hole, a limiting rotating plate is fixedly mounted on the rotating plate rotating shaft, and a rotating plate clamping groove is formed in the bottom end of the fixing frame and the position, corresponding to the limiting rotating plate, of the first fixing plate.
Furthermore, the two limiting rotating plates can be arranged correspondingly, the two rotating shaft mounting holes, the two rotating plate rotating shafts and the two rotating plate clamping grooves are also arranged correspondingly, toothed belt wheels are fixedly mounted on the two rotating plate rotating shafts respectively, and synchronous belts are mounted on the toothed belt wheels in a meshed mode.
Furthermore, a transmission rod mounting hole parallel to the axis of the first gear is formed in the fixed base, the transmission rod mounting hole is communicated with the rotating shaft mounting hole in an intersecting manner, a connecting transmission rod is mounted in the transmission rod mounting hole, a second gear is fixedly mounted at one end of the connecting transmission rod and meshed with the first gear, the second gear is mounted in a nut mounting groove, the second gear can only rotate and cannot move in the nut mounting groove, a first bevel gear is fixedly mounted at the other end of the connecting transmission rod, a second bevel gear is fixedly mounted at one end, close to the connecting transmission rod, of the rotating plate rotating shaft, and the first bevel gear and the second bevel gear are in meshed transmission.
The beneficial effect of this disclosure:
this is disclosed through setting up mount, unable adjustment base and fixed roof, places the doorbell in the mount, on the mount was fixed in unable adjustment base, unable adjustment roof installed in unable adjustment base's top, unable adjustment base installs on door or wall for the dismantlement work of doorbell becomes simple.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present disclosure;
FIG. 2 is an exploded schematic view of an embodiment of the present disclosure;
FIG. 3 is an exploded schematic view of another perspective of an embodiment of the present disclosure;
FIG. 4 is a partial structural schematic of an embodiment of the present disclosure;
fig. 5 is a schematic partial structural cross-sectional view of an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
As shown in fig. 1 to 5, a fixing device for a doorbell comprises a fixing frame 1, a fixing base 2 and a fixing top plate 3, wherein the fixing top plate 3 is installed above the fixing base 2, the fixing frame 1 is installed on the fixing base 2, a doorbell 4 is installed in the fixing frame 1 and the fixing top plate 3, and the fixing base 2 is installed on a door or a wall;
baffle 11 is installed to the bottom of mount 1 for difficult removal when doorbell 4 is located mount 1.
Example 1:
a connecting plate 14 is fixedly arranged on the outer side surface of the fixed frame 1, a connecting groove 23 is formed in the fixed base 2, and the connecting plate 14 is arranged in the connecting groove 23;
a blind hole penetrating through the connecting groove 23 is formed in one side, provided with the connecting groove 23, of the fixing base 2, a connecting rod 25 is installed in the blind hole of the fixing base 2, a connecting through hole 15 corresponding to the connecting rod 25 is formed in the connecting plate 14, the connecting rod 25 is installed in the connecting through hole 15, a guide inclined plane 28 is arranged at one end of the connecting rod 25, a guide effect is achieved when the connecting rod 25 is installed in the connecting through hole 15, and the connecting rod 25 and the connecting through hole 15 are convenient to install;
the connecting plate 14 is fixed in the connecting groove 23 through the connection between the connecting rod 25 and the connecting through hole 15, so that the fixing frame 1 is fixed on the fixing base 2;
a nut mounting groove 24 is formed in one side of the blind hole of the fixed base 2, a fixed nut 26 is mounted in the nut mounting groove 24, the fixed nut 26 is mounted on the connecting rod 25, an inner ring of the fixed nut 26 is mounted in threaded fit with the connecting rod 25, a first gear 27 is fixedly mounted on an outer ring of the fixed nut 26, the fixed nut 26 rotates along with the rotation of the first gear 27, the fixed nut 26 and the first gear 27 are mounted in the nut mounting groove 24, and the fixed nut 26 and the first gear 27 can only rotate and can not move in the nut mounting groove 24;
a rack mounting groove 29 is formed in the outer side surface of the fixed base 2, a first rack 31 is slidably mounted in the rack mounting groove 29, and the first rack 31 is meshed with the first gear 27;
when the first rack 31 moves along the rack installation groove 29, the first gear 27 rotates along with the movement of the first rack 31, and drives the fixing nut 26 to rotate, because the fixing nut 26 can only rotate but can not move, the connecting rod 25 in threaded fit with the fixing nut 26 moves along the axis direction of the connecting rod under the rotation action of the fixing nut 26, and under the action of the guide inclined plane 28, the connecting rod 25 is inserted into the connecting through hole 15, so that the connecting plate 14 is fixed inside the connecting groove 23.
One side of the bottom end of the fixed top plate 3 is fixedly connected with a first rack 31, one side surface of the fixed top plate 3 is opened, the fixed top plate 3 moves along the direction of the rack mounting groove 29, so that the fixed top plate 3 can be mounted above the fixed base 2 and the fixed frame 1, and the fixed top plate 3 is connected with the fixed base 2 by screws, so that the doorbell 4 is fixed and immovable in the fixed frame 1;
when the fixed top plate 3 drives the first rack 31 to move, the connecting rod 25 is installed in the connecting through hole 15 and the connecting plate 14 is fixedly installed in the connecting groove 23 through the meshing action of the first rack 31 and the first gear 27 and the thread matching action of the fixing nut 26 and the connecting rod 25;
thus, the fixing frame 1 can be fixed on the fixing base 2 only by moving the fixing top plate 3 when the fixing top plate 3 is installed.
Example 2:
a first fixing plate 12 is fixedly installed at the bottom end of the fixing frame 1, a first slot 13 is arranged between the first fixing plate 12 and the bottom end of the fixing frame 1, a second slot 21 is formed in the bottom end of the interior of the fixing base 2, a second fixing plate 22 is arranged at the top end of the second slot 21, the first fixing plate 12 is installed in the second slot 21, and the second fixing plate 22 is installed in the first slot 13;
a rotating shaft mounting hole is formed in the second fixing plate 22, a rotating plate rotating shaft 17 is rotatably mounted in the rotating shaft mounting hole, a limiting rotating plate 16 is fixedly mounted on the rotating plate rotating shaft 17, and rotating plate clamping grooves 110 are formed in the bottom end of the fixing frame 1 and the position, corresponding to the limiting rotating plate 16, on the first fixing plate 12;
when the first fixing plate 12 is inserted into the second slot 21 and the second fixing plate 22 is inserted into the first slot 13, the rotating plate rotating shaft 17 is rotated, and the limiting rotating plate 16 is clamped into the rotating plate clamping slot 110, so that the positions of the first fixing plate 12 and the second slot 21, and the positions of the second fixing plate 22 and the first slot 13 are fixed, and the fixing frame 1 is fixed on the fixing base 2.
Example 3:
on the basis of embodiment 2, two limiting rotating plates 16 can be arranged, correspondingly, two rotating shaft mounting holes, two rotating plate rotating shafts 17 and two rotating plate clamping grooves 110 are also arranged, toothed belt wheels 19 are fixedly mounted on the two rotating plate rotating shafts 17 respectively, synchronous belts 18 are meshed and mounted on the toothed belt wheels 19, and the two limiting rotating plates 16 can be clamped into the two rotating plate clamping grooves 110 respectively only by rotating one rotating plate rotating shaft 17 under the action of the synchronous belts 18 and the two toothed belt wheels 19.
Example 4:
on the basis of the embodiment 1, the embodiment 2 and the embodiment 3, a transmission rod mounting hole parallel to the axis of the first gear 27 is formed in the fixed base 2, and the transmission rod mounting hole is communicated with the rotating shaft mounting hole in an intersecting manner;
a connecting transmission rod 51 is installed in the transmission rod installation hole, a second gear 5 is fixedly installed at one end of the connecting transmission rod 51, the second gear 5 is installed in the nut installation groove 24, the second gear 5 is meshed with the first gear 27, the second gear 5 can only rotate and can not move in the nut installation groove 24, a first bevel gear 52 is fixedly installed at the other end of the connecting transmission rod 51, a second bevel gear 53 is fixedly installed at one end, close to the connecting transmission rod 51, of the rotating plate rotating shaft 17, and the first bevel gear 52 and the second bevel gear 53 are in meshed transmission;
when the first gear 27 rotates, the second gear 5 rotates therewith and drives the connecting transmission rod 51 to rotate, so that the first bevel gear 52 rotates and drives the second bevel gear 53 to rotate, thereby rotating the limiting rotating plate 16 and clamping into the rotating plate clamping groove 110, so that the fixing frame 1 is fixed on the fixing base 2.
The working principle is as follows:
placing the doorbell 4 in the fixed frame 1, placing the fixed frame 1 on the fixed base 2, inserting the connecting plate 14 into the connecting groove 23, inserting the first fixing plate 12 into the second slot 21, and inserting the second fixing plate 22 into the first slot 13;
sliding the fixed top plate 3 from one end of the fixed base 2 along the rack mounting groove 29, driving the first gear 27 to rotate by the first rack 31, inserting the connecting rod 25 into the connecting through hole 15 through the fixing nut 26, and fixing the connecting plate 14 in the connecting groove 23, so as to fix one side surface of the fixed frame 1 on one side surface of the fixed base 2;
meanwhile, the rotation of the first gear 27 drives the second gear 5, the connecting transmission rod 51 and the first bevel gear 52 to rotate, so that the second bevel gear 53 rotates and drives the rotating plate rotating shaft 17 to rotate, the rotating plate rotating shaft 17 fixed with the second bevel gear 53 rotates and drives the other rotating plate rotating shaft 17 to rotate under the action of the toothed belt wheel 19 and the synchronous belt 18, so that the limiting rotating plate 16 rotates and is clamped in the rotating plate clamping groove 110, the first fixing plate 12 is fixed in the second slot 21, the second fixing plate 22 is fixed in the first slot 13, and the bottom of the fixing frame 1 is fixed at the bottom of the fixing base 2;
when the fixed top plate 3 completely covers the top end of the fixed base 2, the fixed top plate 3 and the fixed base 2 are fixed through a fastener;
when the doorbell 4 needs to be repaired or replaced or the doorbell 4 needs to be cleaned, the fixing piece is disassembled, the fixing top plate 3 slides along the rack installation groove 29 until the fixing top plate 3 is separated from the fixing base 2, the first rack 31 is driven to move by the movement of the fixing top plate 3, and the first gear 27 is driven to rotate, so that the connecting rod 25 is separated from the connecting through hole 15;
meanwhile, the rotation of the first gear 27 drives the second gear 5, the connecting transmission rod 51, the first bevel gear 52, the second bevel gear 53, the rotating plate rotating shaft 17, the toothed belt wheel 19 and the synchronous belt 18 to rotate, so that the limiting rotating plate 16 is separated from the rotating plate clamping groove 110; thus, the fixing frame 1 can be separated from the fixing base 2.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing illustrates and describes the general principles, principal features, and advantages of the present disclosure. It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the disclosure, and that various changes and modifications may be made to the disclosure without departing from the spirit and scope of the disclosure, which is intended to be covered by the claims.
Claims (3)
1. The doorbell fixing device is characterized by comprising a fixing frame (1), a fixing base (2) and a fixing top plate (3), wherein the fixing top plate (3) is arranged above the fixing base (2), and the fixing frame (1) is arranged on the fixing base (2); a baffle (11) is arranged at the bottom of the fixed frame (1); a connecting plate (14) is fixedly arranged on the outer side surface of the fixing frame (1), a connecting groove (23) is formed in the fixing base (2), and the connecting plate (14) is arranged in the connecting groove (23);
a blind hole penetrating through the connecting groove (23) is formed in one side, provided with the connecting groove (23), of the fixing base (2), a connecting rod (25) is installed in the blind hole of the fixing base (2), the connecting rod (25) is connected with the fixing base (2) in a sliding mode, the rotational freedom degree of the connecting rod (25) is limited, a connecting through hole (15) corresponding to the connecting rod (25) is formed in the connecting plate (14), and the connecting rod (25) is inserted into the connecting through hole (15) along the axial direction in a sliding fit mode to limit the connecting plate (14);
a nut mounting groove (24) is formed in one side of a blind hole of the fixing base (2), a fixing nut (26) is mounted in the nut mounting groove (24), an inner ring of the fixing nut (26) is mounted on the connecting rod (25) in a threaded fit mode, a first gear (27) is fixedly mounted on an outer ring of the fixing nut (26), the fixing nut (26) and the first gear (27) are mounted in the nut mounting groove (24), and the fixing nut (26) and the first gear (27) can only rotate and cannot move in the nut mounting groove (24);
a rack mounting groove (29) is formed in the outer side surface of the fixed base (2), a first rack (31) is slidably mounted in the rack mounting groove (29), and the first rack (31) is meshed with the first gear (27);
a first fixing plate (12) is fixedly mounted at the bottom end of the fixing frame (1), a first slot (13) is formed between the first fixing plate (12) and the bottom end of the fixing frame (1), a second slot (21) is formed in the bottom end of the inner portion of the fixing base (2), a second fixing plate (22) is arranged at the top end of the second slot (21), the first fixing plate (12) is mounted in the second slot (21), and the second fixing plate (22) is mounted in the first slot (13);
a rotating shaft mounting hole is formed in the second fixing plate (22), a rotating plate rotating shaft (17) is rotatably mounted in the rotating shaft mounting hole, a limiting rotating plate (16) is fixedly mounted on the rotating plate rotating shaft (17), and rotating plate clamping grooves (110) are formed in the bottom end of the fixing frame (1) and the position, corresponding to the limiting rotating plate (16), on the first fixing plate (12);
the number of the limiting rotating plates (16) can be two, correspondingly, two rotating shaft mounting holes, two rotating plate rotating shafts (17) and two rotating plate clamping grooves (110) are also arranged, toothed belt wheels (19) are respectively and fixedly mounted on the two rotating plate rotating shafts (17), and synchronous belts (18) are meshed and mounted on the toothed belt wheels (19);
a transmission rod mounting hole parallel to the axis of the first gear (27) is formed in the fixed base (2), and the transmission rod mounting hole is communicated with the rotating shaft mounting hole in an intersecting manner;
the transmission rod mounting hole is internally provided with a connecting transmission rod (51), one end of the connecting transmission rod (51) is fixedly provided with a second gear (5), the second gear (5) is meshed with the first gear (27), the second gear (5) is mounted in the nut mounting groove (24), the second gear (5) can only rotate and cannot move in the nut mounting groove (24), the other end of the connecting transmission rod (51) is fixedly provided with a first bevel gear (52), one end, close to the connecting transmission rod (51), of the rotating plate rotating shaft (17) is fixedly provided with a second bevel gear (53), and the first bevel gear (52) and the second bevel gear (53) are in meshed transmission.
2. A doorbell fixture according to claim 1, characterised in that one end of the connecting rod (25) is provided with a guiding ramp (28).
3. A doorbell fixture as claimed in claim 1, characterised in that the bottom side of the fixed top plate (3) is fixedly connected to the first rack (31), with an opening in one side of the fixed top plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010887286.5A CN112161153B (en) | 2020-08-28 | 2020-08-28 | Fixing device of doorbell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010887286.5A CN112161153B (en) | 2020-08-28 | 2020-08-28 | Fixing device of doorbell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112161153A CN112161153A (en) | 2021-01-01 |
| CN112161153B true CN112161153B (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010887286.5A Active CN112161153B (en) | 2020-08-28 | 2020-08-28 | Fixing device of doorbell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112161153B (en) |
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| CN205261170U (en) * | 2015-11-26 | 2016-05-25 | 智美达（江苏）数字技术有限公司 | Doorbell fixed knot constructs |
| CN106335123A (en) * | 2016-11-11 | 2017-01-18 | 王二立 | The methods for manufacturing single-plate folding furniture and single-plate folding furniture |
| US9740084B1 (en) * | 2016-11-21 | 2017-08-22 | Christopher E. Mar | Angled mounting structure for a video camera doorbell assembly |
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| CN210771144U (en) * | 2019-10-30 | 2020-06-16 | 康新（中国）设计工程股份有限公司 | Embedded wall-hanging smart machine support |
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| CN111462430A (en) * | 2020-05-13 | 2020-07-28 | 深圳市凯木金科技有限公司 | Doorbell structure and doorbell fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112161153A (en) | 2021-01-01 |
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