CN112077103A - Hidden surveillance camera head cleaning device - Google Patents
Hidden surveillance camera head cleaning device Download PDFInfo
- Publication number
- CN112077103A CN112077103A CN202010898599.0A CN202010898599A CN112077103A CN 112077103 A CN112077103 A CN 112077103A CN 202010898599 A CN202010898599 A CN 202010898599A CN 112077103 A CN112077103 A CN 112077103A
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- China
- Prior art keywords
- connecting rod
- camera
- rotatably connected
- fixedly connected
- cleaning device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000005507 spraying Methods 0.000 claims description 13
- 230000002146 bilateral effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 27
- 238000012544 monitoring process Methods 0.000 abstract description 17
- 239000007921 spray Substances 0.000 abstract description 6
- 239000011324 bead Substances 0.000 description 6
- 241000883990 Flabellum Species 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B11/00—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto
- B08B11/04—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto specially adapted for plate glass, e.g. prior to manufacture of windshields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Camera Bodies And Camera Details Or Accessories (AREA)
Abstract
The invention relates to the technical field of security monitoring and discloses a hidden monitoring camera cleaning device which comprises a camera main body, wherein a water spray head is arranged on the lower side of the camera main body, a weight block is fixedly connected to the lower side of a rotating rod, a brush plate is connected to the front side of the rotating rod, a moving frame is fixedly connected to the upper side of a circular ring block, a first spring is connected to the inner side of the moving frame, and a swinging block is fixedly connected to the middle of the first spring. This hidden surveillance camera head cleaning device carries out just reversing through the second pivot to drive the brush board and carry out the back and forth movement, then the heavy object piece of below is because the inertia effect takes place to rotate, drive the brush board and carry out the luffing motion, then carry out cleaning work to the camera lens of camera, the shower nozzle sprays water to the camera lens of camera simultaneously, make and brush the board cooperation and carry out cleaning work, this structure has reached and has strengthened the effect that influences monitoring effect, reduce the cost of labor, clean convenient and eliminate the effect of potential safety hazard.
Description
Technical Field
The invention relates to the technical field of security monitoring, in particular to a cleaning device for a hidden monitoring camera.
Background
With the increasing awareness of theft prevention, surveillance cameras are installed in many places in daily life, such as communities, markets, companies, residences and the like. Because the camera exposes for a long time outdoors, produce dust and spot on the lens of camera to influence the monitoring effect of surveillance camera head, the mode of cleaning the camera lens is more and more diversified now.
Most surveillance cameras are not provided with cleaning device in the existing market, the camera exposes outdoor for a long time, produce dust and spot on the lens, influence monitoring effect, main clean mode is cleaned through the manual work, because the camera is installed at the eminence for the most part, the manual work is clean inconvenient and have certain danger, can set up automatic cleaning device outside the camera, automatic cleaning device is outside, make the bulky grow of camera, thereby influence the use, and automatic cleaning device exposes outer life not long moreover. The above situation causes problems of affecting monitoring effect, increasing labor cost, inconvenience in manual cleaning, dangerousness, large camera volume and low service life of the automatic cleaning device.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a hidden monitoring camera cleaning device which has the advantages of enhancing the monitoring effect, reducing the labor cost, being convenient to clean, eliminating the potential safety hazard, keeping the volume of a camera unchanged and prolonging the service life of an automatic cleaning device, and solves the problems that the monitoring effect is influenced, the labor cost is increased, the manual cleaning is inconvenient, the problem is dangerous, the volume of the camera is increased and the service life of the automatic cleaning device is not long.
(II) technical scheme
In order to achieve the purposes of enhancing the monitoring effect, reducing the labor cost and the advantages, being convenient to clean, eliminating potential safety hazards, keeping the volume of a camera unchanged and prolonging the service life of an automatic cleaning device, the invention provides the following technical scheme: a hidden monitoring camera cleaning device comprises a camera main body, wherein a water spray head is arranged on the lower side of the camera main body, a fixed rod is arranged in the camera main body, the upper side of the fixed rod is rotatably connected with a driving shaft, the right side of the driving shaft is rotatably connected with a first connecting rod, the upper right side of the first connecting rod is rotatably connected with a second connecting rod, the right side of the second connecting rod is rotatably connected with a third connecting rod, the right side of the third connecting rod is rotatably connected with a fourth connecting rod, the left side of the fourth connecting rod is rotatably connected with a fifth connecting rod, the left side of the fifth connecting rod is rotatably connected with a sixth connecting rod, the middle position of the sixth connecting rod is rotatably connected with a seventh connecting rod, the right side of the seventh connecting rod is rotatably connected with an eighth connecting rod, the upper side of the eighth connecting rod is rotatably connected with a ninth connecting rod, a first fixed block is fixedly, a water tank is arranged at the lower side of the inside of the flowing chamber, a water pump is arranged inside the water tank, a rotating cavity is arranged at the upper side of the water tank, a fan blade is arranged inside the rotating cavity, a first rotating shaft is rotatably connected to the upper side of the fan blade, a tenth connecting rod is rotatably connected to the upper side of the first rotating shaft, a hose is fixedly connected to the right side of the rotating cavity, an eleventh connecting rod is rotatably connected to the right side of the tenth connecting rod, a twelfth connecting rod is rotatably connected to the upper side of the eleventh connecting rod, a second rotating shaft is rotatably connected to the upper side of the twelfth connecting rod, a second fixing block is arranged at the outer side of the second rotating shaft, a connecting rod is fixedly connected to the left side of the second fixing block, a circular ring block is fixedly connected to the upper side of the second rotating shaft, a rotating rod is rotatably connected to the inner side, the inner side of the moving frame is fixedly connected with a first spring, and the middle part of the first spring is fixedly connected with a swinging block.
Preferably, the water spraying head is provided with water spraying holes, and the water spraying holes are formed in the water spraying head, so that water flow is sprayed out of the water spraying holes, and the effect of cleaning the camera is achieved.
Preferably, the camera body is provided with a groove corresponding to the brush plate, and the brush plate can freely pass in and out through the groove corresponding to the brush plate, so that the effect of cleaning the lens is achieved.
Preferably, the hose is fixedly connected with the sprinkler head, and the hose is fixedly connected with the sprinkler head, so that water in the hose flows into the sprinkler head, and the water spraying action is achieved.
Preferably, first connecting rod, second connecting rod, third connecting rod, fourth connecting rod, fifth connecting rod, sixth connecting rod, seventh connecting rod, eighth connecting rod, ninth connecting rod, first fixed block, flow the room, the tenth connecting rod, the eleventh connecting rod, the twelfth connecting rod, the ring piece, the second pivot, the second fixed block, the dwang, the brush board, the connecting rod, the motion frame, first spring, heavy thing piece and swing piece all set up about camera main part bilateral symmetry, all about camera main part bilateral symmetry through above mechanism, make overall structure cleaner and tidier, thereby reach the later stage and be convenient for the effect of maintenance and maintenance.
Preferably, the third connecting rod and the sixth connecting rod, the eighth connecting rod, the first connecting rod and the fourth connecting rod are parallel to each other, and the third connecting rod and the sixth connecting rod, the first connecting rod and the fourth connecting rod are parallel to each other through the arrangement of the mechanisms, so that the effect of synchronous motion is achieved.
(III) advantageous effects
Compared with the prior art, the invention provides a cleaning device for a hidden monitoring camera, which has the following beneficial effects:
1. this hidden surveillance camera head cleaning device drives first connecting rod through the drive shaft and carries out anticlockwise rotation, and first connecting rod drives the second connecting rod, the fifth connecting rod, the sixth connecting rod rotates, and the second connecting rod drives third connecting rod, the fourth connecting rod, the seventh connecting rod rotates, then the seventh connecting rod drives the eighth connecting rod and rotates, and the sixth connecting rod drives the ninth connecting rod and rotates to promote the outside motion of flow chamber, thereby reached the camera head volume unchangeable and improved the effect in self-cleaning device life-span.
2. This hidden surveillance camera head cleaning device, rotate the intracavity through the rivers flow direction, rivers drive the flabellum and rotate, the flabellum drives first pivot and rotates, thereby it rotates to drive the tenth connecting rod, the tenth connecting rod drives the eleventh connecting rod and rotates, the eleventh connecting rod drives the twelfth connecting rod swing back and forth, then the twelfth connecting rod drives the second pivot and carries out just reversal, thereby it carries out the back and forth movement to drive the brush board, then the heavy thing piece of below rotates because inertial action takes place, then the heavy thing piece rotates back and forth under the effect of first spring, thereby it carries out the luffing motion to drive the brush board, then carry out cleaning work to the camera lens of camera, when rivers promote the flabellum pivoted, rivers then flow to the sprinkler bead in through the hose. The water spray head sprays water to the lens of the camera. The structure achieves the effects of enhancing the monitoring effect, reducing labor cost, being convenient to clean and eliminating potential safety hazards.
Drawings
FIG. 1 is a schematic view of the internal structure of a camera body according to the present invention;
FIG. 2 is a schematic view of the internal structure of the camera body after movement;
FIG. 3 is a perspective view of a camera body according to the present invention;
FIG. 4 is a schematic top view of a brush plate according to the present invention;
FIG. 5 is a front view of the brush plate according to the present invention;
FIG. 6 is a schematic view of the internal structure of the rotating chamber according to the present invention;
FIG. 7 is a perspective view of the sprinkler head of the present invention;
fig. 8 is an enlarged view of the invention at a in fig. 4.
In the figure: 1. a camera body; 2. a sprinkler head; 3. fixing the rod; 4. a drive shaft; 5. a first link; 6. a second link; 7. a third link; 8. a fourth link; 9. a fifth link; 10. a sixth link; 11. a seventh connecting rod; 12. an eighth link; 13. a ninth link; 14. a first fixed block; 15. a flow chamber; 1501. a first rotating shaft; 1502. a fan blade; 1503. a hose; 1504. a rotation chamber; 1505. a water tank; 1506. a water pump; 16. a tenth link; 17. an eleventh link; 18. a twelfth link; 1801. a circular ring block; 1802. a second rotating shaft; 19. a second fixed block; 20. rotating the rod; 21. brushing the board; 22. a connecting rod; 23. a motion frame; 24. a first spring; 25. a heavy material block; 26. a wobble block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, a hidden monitoring camera cleaning device includes a camera body 1, the camera body 1 is provided with a slot corresponding to the brush plate 21, and the brush plate 21 can freely pass in and out by the corresponding slot, so as to achieve the effect of cleaning the lens. The downside of camera main part 1 is provided with sprinkler bead 2, is provided with the hole for water spraying on sprinkler bead 2 for rivers are spout from the hole for water spraying, thereby have reached the effect of clean camera. The camera body 1 is internally provided with a fixed rod 3, the upper side of the fixed rod 3 is rotatably connected with a driving shaft 4, the right side of the driving shaft 4 is rotatably connected with a first connecting rod 5, the upper right side of the first connecting rod 5 is rotatably connected with a second connecting rod 6, the right side of the second connecting rod 6 is rotatably connected with a third connecting rod 7, the right side of the third connecting rod 7 is rotatably connected with a fourth connecting rod 8, the left side of the fourth connecting rod 8 is rotatably connected with a fifth connecting rod 9, the left side of the fifth connecting rod 9 is rotatably connected with a sixth connecting rod 10, the middle position of the sixth connecting rod 10 is rotatably connected with a seventh connecting rod 11, the right side of the seventh connecting rod 11 is rotatably connected with an eighth connecting rod 12, the upper side of the eighth connecting rod 12 is rotatably connected with a ninth connecting rod 13, the upper side of the ninth connecting rod 13 is fixedly connected with a first fixed block 14, the inside of water tank 1505 is provided with water pump 1506, the upside of water tank 1505 is provided with rotates chamber 1504, the inside of rotating chamber 1504 is provided with flabellum 1502, the upside of flabellum 1502 rotates and is connected with first pivot 1501, the upside of first pivot 1501 rotates and is connected with tenth connecting rod 16, the right side fixedly connected with hose 1503 of rotating chamber 1504, hose 1503 and sprinkler bead 2 are fixed connection, through hose 1503 and sprinkler bead 2 fixed connection, make the rivers in the hose 1503 flow in the sprinkler bead 2, thereby reach the action of spraying water.
An eleventh link 17 is rotatably connected to the right side of the tenth link 16, a twelfth link 18 is rotatably connected to the upper side of the eleventh link 17, a second rotating shaft 1802 is rotatably connected to the upper side of the twelfth link 18, a second fixing block 19 is arranged on the outer side of the second rotating shaft 1802, a connecting rod 22 is fixedly connected to the left side of the second fixing block 19, a ring block 1801 is fixedly connected to the upper side of the second rotating shaft 1802, a rotating rod 20 is rotatably connected to the inner side of the ring block 1801, a heavy object block 25 is fixedly connected to the lower side of the rotating rod 20, a brush plate 21 is fixedly connected to the front side of the rotating rod 20, a moving frame 23 is fixedly connected to the upper side of the ring block 1801, a first spring 24 is fixedly connected to the inner side of the moving frame 23, and a swing block. The camera comprises a first connecting rod 5, a second connecting rod 6, a third connecting rod 7, a fourth connecting rod 8, a fifth connecting rod 9, a sixth connecting rod 10, a seventh connecting rod 11, an eighth connecting rod 12, a ninth connecting rod 13, a first fixing block 14, a flow chamber 15, a tenth connecting rod 16, an eleventh connecting rod 17, a twelfth connecting rod 18, a ring block 1801, a second rotating shaft 1802, a second fixing block 19, a rotating rod 20, a brush plate 21, a connecting rod 22, a moving frame 23, a first spring 24, a weight block 25 and a swinging block 26 which are arranged in bilateral symmetry with respect to a camera body 1. The third connecting rod 7, the sixth connecting rod 10, the eighth connecting rod 12, the first connecting rod 5 and the fourth connecting rod 8 are respectively parallel to each other, and the mechanisms are respectively parallel to each other through arrangement, so that the effect of synchronous motion is achieved.
The working principle is as follows: when the device works, the driving shaft 4 is started to drive the first connecting rod 5 to rotate anticlockwise, the first connecting rod 5 drives the second connecting rod 6, the fifth connecting rod 9 and the sixth connecting rod 10 to rotate, the second connecting rod 6 drives the third connecting rod 7, the fourth connecting rod 8 and the seventh connecting rod 11 to rotate, then the seventh connecting rod 11 drives the eighth connecting rod 12 to rotate, and the sixth connecting rod 10 drives the ninth connecting rod 13 to rotate, so that the flowing chamber 15 is pushed to move outwards to the position shown in figure 2, and the effects of keeping the volume of a camera unchanged and prolonging the service life of the automatic cleaning device are achieved.
Then the water pump 1506 draws water in the water tank 1505 and works, then the water flow flows to the rotating cavity 1504, the water flow drives the fan blade 1502 to rotate, the fan blade 1502 drives the first rotating shaft 1501 to rotate, thereby driving the tenth connecting rod 16 to rotate, the tenth connecting rod 16 drives the eleventh connecting rod 17 to rotate, the eleventh connecting rod 17 drives the twelfth connecting rod 18 to swing back and forth, then the twelfth connecting rod 18 drives the second rotating shaft 1802 to rotate forward and backward, thereby driving the brush plate 21 to move back and forth, then the lower heavy object block 25 rotates due to the inertia effect, then the heavy object block 25 rotates back and forth under the effect of the first spring 24, thereby driving the brush plate 21 to swing up and down, then the lens of the camera is cleaned, and when the water flow pushes the fan blade 1502 to rotate, the water flow passes through the hose 1503 and then flows into the water jet 2. The sprinkler head 2 sprays water to the lens of the camera. The structure achieves the effects of enhancing the monitoring effect, reducing labor cost, being convenient to clean and eliminating potential safety hazards.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a first cleaning device of hidden surveillance camera, includes camera main part (1), its characterized in that: the camera comprises a camera body (1), a water spraying head (2) is arranged on the lower side of the camera body (1), a fixing rod (3) is arranged inside the camera body (1), the upper side of the fixing rod (3) is rotatably connected with a driving shaft (4), the right side of the driving shaft (4) is rotatably connected with a first connecting rod (5), the upper right side of the first connecting rod (5) is rotatably connected with a second connecting rod (6), the right side of the second connecting rod (6) is rotatably connected with a third connecting rod (7), the right side of the third connecting rod (7) is rotatably connected with a fourth connecting rod (8), the left side of the fourth connecting rod (8) is rotatably connected with a fifth connecting rod (9), the left side of the fifth connecting rod (9) is rotatably connected with a sixth connecting rod (10), the middle position of the sixth connecting rod (10) is rotatably connected with a seventh connecting rod (11), the right side of the seventh, a ninth connecting rod (13) is rotatably connected to the upper side of the eighth connecting rod (12), a first fixed block (14) is fixedly connected to the upper side of the ninth connecting rod (13), a flow chamber (15) is arranged on the upper side of the first fixed block (14), a water tank (1505) is arranged on the lower side inside the flow chamber (15), a water pump (1506) is arranged inside the water tank (1505), a rotation cavity (1504) is arranged on the upper side of the water tank (1505), a fan blade (1502) is arranged inside the rotation cavity (1504), a first rotating shaft (1501) is rotatably connected to the upper side of the fan blade (1502), a tenth connecting rod (16) is rotatably connected to the upper side of the first rotating shaft (1501), a hose (1503) is fixedly connected to the right side of the rotation cavity (1504), an eleventh connecting rod (17) is rotatably connected to the right side of the tenth connecting rod (16), a twelfth connecting rod (18) is rotatably connected to the upper side of the eleventh connecting rod (, the outside of second pivot (1802) is provided with second fixed block (19), left side fixedly connected with connecting rod (22) of second fixed block (19), upside fixedly connected with ring piece (1801) of second pivot (1802), the inboard rotation of ring piece (1801) is connected with dwang (20), downside fixedly connected with weight piece (25) of dwang (20), the front side fixedly connected with brush board (21) of dwang (20), upside fixedly connected with motion frame (23) of ring piece (1801), the first spring (24) of the inboard fixedly connected with of motion frame (23), the middle part fixedly connected with of first spring (24) swings piece (26).
2. A concealed surveillance camera cleaning device according to claim 1, wherein: and the water spraying head (2) is provided with a water spraying hole.
3. A concealed surveillance camera cleaning device according to claim 1, wherein: the camera body (1) is provided with a slot corresponding to the brush plate (21).
4. A concealed surveillance camera cleaning device according to claim 1, wherein: the hose (1503) is fixedly connected with the water spraying head (2).
5. A concealed surveillance camera cleaning device according to claim 1, wherein: the camera comprises a camera body (1), and is characterized in that the camera body is provided with a first connecting rod (5), a second connecting rod (6), a third connecting rod (7), a fourth connecting rod (8), a fifth connecting rod (9), a sixth connecting rod (10), a seventh connecting rod (11), an eighth connecting rod (12), a ninth connecting rod (13), a first fixing block (14), a flow chamber (15), a tenth connecting rod (16), an eleventh connecting rod (17), a twelfth connecting rod (18), a ring block (1801), a second rotating shaft (1802), a second fixing block (19), a rotating rod (20), a brush plate (21), a connecting rod (22), a moving frame (23), a first spring (24), a heavy object block (25) and a swinging block (26) which are arranged in bilateral symmetry with respect to the camera body (1).
6. A concealed surveillance camera cleaning device according to claim 1, wherein: the third connecting rod (7), the sixth connecting rod (10), the eighth connecting rod (12), the first connecting rod (5) and the fourth connecting rod (8) are parallel to each other respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898599.0A CN112077103A (en) | 2020-08-31 | 2020-08-31 | Hidden surveillance camera head cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898599.0A CN112077103A (en) | 2020-08-31 | 2020-08-31 | Hidden surveillance camera head cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112077103A true CN112077103A (en) | 2020-12-15 |
Family
ID=73731495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010898599.0A Withdrawn CN112077103A (en) | 2020-08-31 | 2020-08-31 | Hidden surveillance camera head cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112077103A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982204A (en) * | 2021-03-01 | 2021-06-18 | 王一勋 | Road and bridge noise reduction device for municipal bridge engineering |
| CN113975126A (en) * | 2021-11-03 | 2022-01-28 | 上海清宁熙健康科技有限公司 | Heartbeat monitoring structure for electric vibration health-care chair |
-
2020
- 2020-08-31 CN CN202010898599.0A patent/CN112077103A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982204A (en) * | 2021-03-01 | 2021-06-18 | 王一勋 | Road and bridge noise reduction device for municipal bridge engineering |
| CN113975126A (en) * | 2021-11-03 | 2022-01-28 | 上海清宁熙健康科技有限公司 | Heartbeat monitoring structure for electric vibration health-care chair |
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Application publication date: 20201215 |
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| WW01 | Invention patent application withdrawn after publication |