CN216697510U - Performance testing device for photosensitive flame detector - Google Patents
Performance testing device for photosensitive flame detector Download PDFInfo
- Publication number
- CN216697510U CN216697510U CN202123052637.XU CN202123052637U CN216697510U CN 216697510 U CN216697510 U CN 216697510U CN 202123052637 U CN202123052637 U CN 202123052637U CN 216697510 U CN216697510 U CN 216697510U
- Authority
- CN
- China
- Prior art keywords
- groove
- flame detector
- sliding
- seat
- wall
- 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.)
- Expired - Fee Related
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 230000005855 radiation Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 60
- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000011056 performance test Methods 0.000 abstract description 2
- 206010070834 Sensitisation Diseases 0.000 description 6
- 230000008313 sensitization Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Landscapes
- Fire Alarms (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The utility model belongs to the field of test equipment, and particularly relates to a photosensitive flame detector performance test device which comprises a placing plate, wherein an optical radiation control box is arranged at the top of the placing plate, a sliding groove is formed in the top of the placing plate, a sliding seat is slidably mounted in the sliding groove, an adjusting groove is formed in one side of the sliding seat, lead screws are rotatably mounted on the inner wall of the top and the inner wall of the bottom of the adjusting groove, a lead screw seat is slidably mounted in the adjusting groove, the lead screw seat is sleeved on the lead screw in a threaded manner, a mounting plate is fixedly mounted on the lead screw seat, a photosensitive flame detector is fixedly connected to one side of the mounting plate, a driving mechanism is arranged on the sliding seat and connected with the lead screw, and the inner walls of two sides of the sliding groove are fixedly provided with a same rectangular rod. The utility model has reasonable design and is convenient to adjust the space and the included angle between the photosensitive flame detector and the light radiation control box, thereby being convenient to test the detection performance of the photosensitive flame detector.
Description
Technical Field
The utility model relates to the technical field of test equipment, in particular to a performance test device for a photosensitive flame detector.
Background
The photosensitive flame detector detects the generation of smoke and heat during the combustion of substances, and simultaneously generates invisible light radiation which is visible or not in the atmosphere. The flame detector is a detector responding to the light radiation of fire, and detects the specific wavelength and the flicker frequency of flame by sensing the electromagnetic wave radiated by the flame to send out an alarm signal.
At present, the performance of the photosensitive flame detector is tested, the position of the photosensitive flame detector needs to be adjusted, the problem that the distance and the included angle between the photosensitive flame detector and the optical radiation control box are not convenient to adjust exists, and therefore the performance testing device of the photosensitive flame detector is provided for solving the problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the distance and the included angle between a photosensitive flame detector and an optical radiation control box are inconvenient to adjust in the prior art, and provides a photosensitive flame detector performance testing device.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a performance testing device of a photosensitive flame detector comprises a placing plate, wherein the top of the placing plate is provided with an optical radiation control box, the top of the placing plate is provided with a sliding groove, a sliding seat is arranged in the sliding groove in a sliding manner, one side of the sliding seat is provided with an adjusting groove, a screw rod is rotatably arranged on the inner wall of the top part and the inner wall of the bottom part of the adjusting groove, a screw rod seat is arranged in the adjusting groove in a sliding manner, the screw rod seat is sleeved on the screw rod in a threaded manner, a mounting plate is fixedly arranged on the screw rod seat, one side of the mounting plate is fixedly connected with a photosensitive flame detector, and the sliding seat is provided with a driving mechanism, and the driving mechanism is connected with the screw rod, the same rectangular rod is fixedly installed on the inner walls of the two sides of the sliding groove, the transmission rack is installed at the top of the rectangular rod, the sliding seat is sleeved on the rectangular rod in a sliding mode, the screw rod is provided with a linkage mechanism, and the transmission mechanism is arranged between the linkage mechanism and the transmission rack.
Preferably, the driving mechanism comprises a driving bevel gear, a driven bevel gear, a rotating shaft and a hand wheel, the driven bevel gear is fixedly arranged on the screw rod, the rotating shaft is rotatably arranged on the sliding seat, the driving bevel gear is fixedly arranged on the rotating shaft, the driving bevel gear is meshed with the driven bevel gear, and the hand wheel is fixedly arranged on the rotating shaft.
Preferably, the transmission mechanism comprises a groove, a transmission shaft and a transmission gear, the groove is formed in the sliding seat, the transmission shaft is rotatably arranged in the groove, the transmission gear is fixedly arranged on the transmission shaft, and the transmission gear is meshed with the transmission rack.
Preferably, the linkage mechanism comprises a worm and a worm wheel, the worm is fixedly arranged on the screw rod, the screw rod extends into the groove, the worm wheel is fixedly arranged on the transmission shaft, and the worm is meshed with the worm wheel.
Preferably, a rotating hole is formed in the inner wall of one side of the adjusting groove, and the rotating shaft is rotatably connected with the rotating hole.
Preferably, the front side inner wall of sliding tray and all seted up the spacing groove on the rear side inner wall, the equal fixed mounting in front side and the rear side of sliding seat has spacing seat, and spacing seat and the spacing groove sliding connection who corresponds.
Preferably, the sliding seat is provided with a rectangular hole, the groove is communicated with the rectangular hole, and the rectangular rod penetrates through the rectangular hole.
Preferably, the front side inner wall and the rear side inner wall of the groove are provided with rotating grooves, and the transmission shaft is rotatably connected with the rotating grooves.
The utility model has the beneficial effects that:
1. the detection distance of the photosensitive flame detector can be tested by matching the photosensitive flame detector with the optical radiation control box, the hand wheel is manually rotated, so that the rotating shaft and the hand wheel can synchronously rotate, the rotating shaft can drive the screw rod to rotate by matching the driving bevel gear and the driven bevel gear, the screw rod can drive the screw rod seat to move in the vertical direction, and the screw rod seat can drive the photosensitive flame detector to adjust in the vertical direction;
2. when the lead screw rotates, the lead screw can drive the worm to rotate, the worm can drive the worm wheel to rotate, transmission shaft and drive gear can carry out synchronous rotation with the worm wheel this moment, under the effect of driving rack, drive gear's rotation can drive the sliding seat and carry out the horizontal direction and remove, the sliding seat can drive sensitization flame detector and adjust at the horizontal direction, be convenient for adjust interval and contained angle between sensitization flame detector and the optical radiation control box, thereby be convenient for test sensitization flame detector's detection performance.
Drawings
FIG. 1 is a schematic perspective view of a device for testing performance of a photosensitive flame detector according to the present invention;
FIG. 2 is a schematic front view of a device for testing the performance of a photosensitive flame detector according to the present invention;
FIG. 3 is a schematic structural diagram of part A of a photosensitive flame detector performance testing apparatus according to the present invention;
fig. 4 is a schematic structural diagram of a part B of a photosensitive flame detector performance testing apparatus according to the present invention.
In the figure: 1. placing the plate; 2. an optical radiation control box; 3. a sliding groove; 4. a sliding seat; 5. an adjustment groove; 6. a screw rod; 7. a screw base; 8. mounting a plate; 9. a photosensitive flame detector; 10. a driven bevel gear; 11. a rotating shaft; 12. a drive bevel gear; 13. a hand wheel; 14. a worm; 15. a groove; 16. a rectangular bar; 17. a drive rack; 18. a drive shaft; 19. a worm gear; 20. a transmission gear.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present, and the "disposed" refers to an existing connection, whether connected, mounted, secured, or permanently connected. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
Referring to fig. 1-4, a photosensitive flame detector performance testing device comprises a placing plate 1, a light radiation control box 2 is arranged on the top of the placing plate 1, a sliding groove 3 is arranged on the top of the placing plate 1, a sliding seat 4 is slidably arranged in the sliding groove 3, an adjusting groove 5 is arranged on one side of the sliding seat 4, a screw rod 6 is rotatably arranged on the top inner wall and the bottom inner wall of the adjusting groove 5, a screw rod seat 7 is slidably arranged in the adjusting groove 5, the screw rod seat 7 is in threaded sleeve connection with the screw rod 6, a mounting plate 8 is fixedly arranged on the screw rod seat 7, a photosensitive flame detector 9 is fixedly connected to one side of the mounting plate 8, a driving mechanism is arranged on the sliding seat 4 and connected with the screw rod 6, the same rectangular rod 16 is fixedly arranged on the inner walls on the two sides of the sliding groove 3, a transmission rack 17 is arranged on the top of the rectangular rod 16, and the sliding seat 4 is in sliding sleeve connection with the rectangular rod 16, the screw 6 is provided with a linkage mechanism, and a transmission mechanism is arranged between the linkage mechanism and the transmission rack 17.
In the embodiment, the driving mechanism comprises a driving bevel gear 12, a driven bevel gear 10, a rotating shaft 11 and a hand wheel 13, the driven bevel gear 10 is fixedly arranged on the screw rod 6, the rotating shaft 11 is rotatably arranged on the sliding seat 4, the driving bevel gear 12 is fixedly arranged on the rotating shaft 11, the driving bevel gear 12 is meshed with the driven bevel gear 10, the hand wheel 13 is fixedly arranged on the rotating shaft 11, the transmission mechanism comprises a groove 15, a transmission shaft 18 and a transmission gear 20, the groove 15 is arranged on the sliding seat 4, the transmission shaft 18 is rotatably arranged in the groove 15, the transmission gear 20 is fixedly arranged on the transmission shaft 18, the transmission gear 20 is meshed with a transmission rack 17, the linkage mechanism comprises a worm 14 and a worm wheel 19, the worm 14 is fixedly arranged on the screw rod 6, the screw rod 6 extends into the groove 15, the worm wheel 19 is fixedly arranged on the transmission shaft 18, and the worm 14 is meshed with the worm wheel 19, the swivelling orifice has been seted up on one side inner wall of adjustment tank 5, and rotation axis 11 rotates with the swivelling orifice to be connected, the spacing groove has all been seted up on the front side inner wall of sliding tray 3 and on the rear side inner wall, the equal fixed mounting in front side and the rear side of sliding tray 4 has spacing seat, and spacing seat and the spacing groove sliding connection who corresponds, the rectangular hole has been seted up on the sliding tray 4, recess 15 is linked together with the rectangular hole, and rectangular rod 16 runs through the rectangular hole, the rotation groove has all been seted up on the front side inner wall of recess 15 and on the rear side inner wall, and transmission shaft 18 rotates with the rotation groove to be connected.
Example two
Referring to fig. 1-4, a photosensitive flame detector performance testing device comprises a placing plate 1, a light radiation control box 2 is arranged at the top of the placing plate 1, a sliding groove 3 is arranged at the top of the placing plate 1, a sliding seat 4 is slidably arranged in the sliding groove 3, an adjusting groove 5 is arranged at one side of the sliding seat 4, a screw rod 6 is rotatably arranged on the inner wall of the top and the inner wall of the bottom of the adjusting groove 5, a screw rod seat 7 is slidably arranged in the adjusting groove 5, the screw rod seat 7 is sleeved on the screw rod 6 in a threaded manner, a mounting plate 8 is fixedly arranged on the screw rod seat 7, a photosensitive flame detector 9 is fixedly connected to one side of the mounting plate 8, a driving mechanism is arranged on the sliding seat 4 and connected with the screw rod 6, the same rectangular rod 16 is fixedly arranged on the inner walls at the two sides of the sliding groove 3, a driving rack 17 is arranged at the top of the rectangular rod 16, the sliding seat 4 is sleeved on the rectangular rod 16 in a sliding manner, the screw 6 is provided with a linkage mechanism, and a transmission mechanism is arranged between the linkage mechanism and the transmission rack 17.
In this embodiment, the driving mechanism includes a driving bevel gear 12, a driven bevel gear 10, a rotating shaft 11 and a hand wheel 13, the driven bevel gear 10 is fixedly disposed on the screw rod 6, the rotating shaft 11 is rotatably disposed on the sliding seat 4, the driving bevel gear 12 is fixedly disposed on the rotating shaft 11, the driving bevel gear 12 is engaged with the driven bevel gear 10, and the hand wheel 13 is fixedly disposed on the rotating shaft 11, and the driving mechanism is disposed to drive the screw rod 6 to rotate.
In this embodiment, the transmission mechanism includes a groove 15, a transmission shaft 18 and a transmission gear 20, the groove 15 is disposed on the sliding seat 4, the transmission shaft 18 is rotatably disposed in the groove 15, the transmission gear 20 is fixedly disposed on the transmission shaft 18, the transmission gear 20 is engaged with the transmission rack 17, and the transmission gear 20 can be rotated by the transmission mechanism.
In this embodiment, the linkage mechanism includes a worm 14 and a worm wheel 19, the worm 14 is fixedly disposed on the screw rod 6, the screw rod 6 extends into the groove 15, the worm wheel 19 is fixedly disposed on the transmission shaft 18, the worm 14 is engaged with the worm wheel 19, and the screw rod 6 can drive the transmission shaft 18 to rotate through the linkage mechanism.
In this embodiment, a rotating hole has been opened on one side inner wall of adjustment tank 5, and rotation axis 11 rotates with the rotating hole to be connected, through being provided with the rotating hole, can make rotation axis 11 carry out stable rotation.
In this embodiment, the spacing groove has all been seted up on the front side inner wall of sliding tray 3 and on the rear side inner wall, and the equal fixed mounting in front side and the rear side of sliding seat 4 has spacing seat, and spacing seat and the spacing groove sliding connection who corresponds can be so that sliding seat 4 carries out stable removal through being provided with spacing seat and spacing groove.
In this embodiment, a rectangular hole is formed in the sliding seat 4, the groove 15 is communicated with the rectangular hole, and the rectangular rod 16 penetrates through the rectangular hole, so that the rectangular rod 16 can be guided by the rectangular hole.
In this embodiment, the rotation groove has all been seted up on the front side inner wall of recess 15 and on the rear side inner wall, and transmission shaft 18 rotates with the rotation groove to be connected, rotates the groove through being provided with, can make transmission shaft 18 carry out stable rotation.
In the utility model, the detection distance of the photosensitive flame detector 9 can be tested by matching the photosensitive flame detector 9 with the light radiation control box 2, the hand wheel 13 is manually rotated to enable the rotating shaft 11 to synchronously rotate with the hand wheel 13, the rotating shaft 11 can drive the screw rod 6 to rotate by matching the driving bevel gear 12 with the driven bevel gear 10, the screw rod 6 can drive the screw rod seat 7 to move in the vertical direction, the screw rod seat 7 can drive the photosensitive flame detector 9 to adjust in the vertical direction, when the screw rod 6 rotates, the screw rod 6 can drive the worm 14 to rotate, the worm 14 can drive the worm wheel 19 to rotate, at the moment, the transmission shaft 18 and the transmission gear 20 can synchronously rotate with the worm wheel 19, and under the action of the transmission rack 17, the rotation of the transmission gear 20 can drive the sliding seat 4 to move in the horizontal direction, slide holder 4 can drive sensitization flame detector 9 and adjust at the horizontal direction, is convenient for adjust interval and contained angle between sensitization flame detector 9 and the optical radiation control box 2 to be convenient for test sensitization flame detector 9's detection performance.
The performance testing device for the photosensitive flame detector provided by the utility model is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. The performance testing device for the photosensitive flame detector comprises a placing plate (1) and is characterized in that a light radiation control box (2) is arranged at the top of the placing plate (1), a sliding groove (3) is formed in the top of the placing plate (1), a sliding seat (4) is arranged in the sliding groove (3), an adjusting groove (5) is formed in one side of the sliding seat (4), a lead screw (6) is rotatably arranged on the inner wall of the top part and the inner wall of the bottom part of the adjusting groove (5), a lead screw seat (7) is arranged in the adjusting groove (5) in a sliding manner, the lead screw (6) is sleeved with the lead screw seat (7) in a threaded manner, a mounting plate (8) is fixedly arranged on the lead screw seat (7), one side of the mounting plate (8) is fixedly connected with the photosensitive flame detector (9), a driving mechanism is arranged on the sliding seat (4), and the driving mechanism is connected with the lead screw (6), fixed mounting has same rectangle pole (16) on the both sides inner wall of sliding tray (3), transmission rack (17) are installed at the top of rectangle pole (16), sliding seat (4) slip cover is established on rectangle pole (16), be equipped with link gear on lead screw (6), be equipped with drive mechanism between link gear and transmission rack (17).
2. The photosensitive flame detector performance testing device of claim 1, wherein the driving mechanism comprises a driving bevel gear (12), a driven bevel gear (10), a rotating shaft (11) and a hand wheel (13), the driven bevel gear (10) is fixedly arranged on the screw rod (6), the rotating shaft (11) is rotatably arranged on the sliding seat (4), the driving bevel gear (12) is fixedly arranged on the rotating shaft (11), the driving bevel gear (12) is meshed with the driven bevel gear (10), and the hand wheel (13) is fixedly arranged on the rotating shaft (11).
3. A sensitive flame detector performance testing device according to claim 1, wherein the transmission mechanism comprises a groove (15), a transmission shaft (18) and a transmission gear (20), the groove (15) is arranged on the sliding seat (4), the transmission shaft (18) is rotatably arranged in the groove (15), the transmission gear (20) is fixedly arranged on the transmission shaft (18), and the transmission gear (20) is meshed with the transmission rack (17).
4. A sensitive flame detector performance testing device according to claim 1, characterized in that the linkage mechanism comprises a worm (14) and a worm wheel (19), the worm (14) is fixedly arranged on the screw rod (6), the screw rod (6) extends into the groove (15), the worm wheel (19) is fixedly arranged on the transmission shaft (18), and the worm (14) is meshed with the worm wheel (19).
5. The photosensitive flame detector performance testing device of claim 1, wherein a rotating hole is formed on one side inner wall of the adjusting groove (5), and the rotating shaft (11) is rotatably connected with the rotating hole.
6. The photosensitive flame detector performance testing device of claim 1, wherein the sliding groove (3) is provided with a limiting groove on the front inner wall and a limiting groove on the rear inner wall, the sliding seat (4) is fixedly provided with a limiting seat on the front side and the rear side, and the limiting seats are connected with the corresponding limiting grooves in a sliding manner.
7. A device for testing the performance of a photosensitive flame detector according to claim 1, wherein the sliding seat (4) is provided with a rectangular hole, the groove (15) is communicated with the rectangular hole, and the rectangular rod (16) penetrates through the rectangular hole.
8. A device for testing performance of a photosensitive flame detector according to claim 3, wherein the groove (15) has a rotation groove formed on both the front inner wall and the rear inner wall, and the transmission shaft (18) is rotatably connected to the rotation groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123052637.XU CN216697510U (en) | 2021-12-07 | 2021-12-07 | Performance testing device for photosensitive flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123052637.XU CN216697510U (en) | 2021-12-07 | 2021-12-07 | Performance testing device for photosensitive flame detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216697510U true CN216697510U (en) | 2022-06-07 |
Family
ID=81838855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123052637.XU Expired - Fee Related CN216697510U (en) | 2021-12-07 | 2021-12-07 | Performance testing device for photosensitive flame detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216697510U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115019491A (en) * | 2022-08-08 | 2022-09-06 | 南京谷贝电气科技有限公司 | Automatic test board for fire-fighting fire sensor |
| CN115100811A (en) * | 2022-06-22 | 2022-09-23 | 招商局重庆公路工程检测中心有限公司 | Detection space debugging method and device for highway tunnel flame detector |
-
2021
- 2021-12-07 CN CN202123052637.XU patent/CN216697510U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100811A (en) * | 2022-06-22 | 2022-09-23 | 招商局重庆公路工程检测中心有限公司 | Detection space debugging method and device for highway tunnel flame detector |
| CN115100811B (en) * | 2022-06-22 | 2024-01-30 | 招商局重庆公路工程检测中心有限公司 | Detection space debugging method and device for highway tunnel flame detector |
| CN115019491A (en) * | 2022-08-08 | 2022-09-06 | 南京谷贝电气科技有限公司 | Automatic test board for fire-fighting fire sensor |
| CN115019491B (en) * | 2022-08-08 | 2022-10-14 | 南京谷贝电气科技有限公司 | Automatic test board for fire-fighting fire sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216697510U (en) | Performance testing device for photosensitive flame detector | |
| CN100557392C (en) | Distribution photometer | |
| CN114183661A (en) | Horizontal adjusting mechanism for surveying and mapping visual angle for land surveying and mapping | |
| CN218822458U (en) | Measuring instrument with coaxial light source | |
| CN215527120U (en) | LED display screen of diversified regulation of self-adaptation | |
| CN114337856B (en) | Be applied to bluetooth microspur characteristic automation test equipment | |
| CN214427762U (en) | RCC electric wave clock time service test equipment | |
| CN201740850U (en) | Electric performance testing device of membrane solar battery component | |
| CN213336476U (en) | UV irradiation device and UV energy detection device comprising same | |
| CN211460157U (en) | Multifunctional visual chart for ophthalmology | |
| CN213228988U (en) | Instrument panel with automatic screen brightness adjusting function | |
| CN219958332U (en) | Flame detector | |
| CN112201124A (en) | Demonstration device for physical teaching of gravitational acceleration | |
| CN113970566B (en) | Small angle X-ray scatterometer | |
| CN216386951U (en) | Air quality detection device for environmental engineering | |
| CN218724746U (en) | Wall-hanging type thermometer | |
| CN218271959U (en) | CO infrared reflection air chamber device | |
| CN217857938U (en) | Electric raster picture is with preventing touching warning device | |
| CN205620109U (en) | Rear -view mirror reflectivity tester | |
| CN220084174U (en) | Temperature measurement security inspection door | |
| CN216670864U (en) | But angle regulation's self-service cash registering machine | |
| CN216020975U (en) | Two-in-one visual chart lamp box | |
| CN221484444U (en) | Product appearance short-term test is with examining utensil | |
| CN220894199U (en) | Microwave oven heating efficiency calibration testing device | |
| CN219916498U (en) | Teaching blackboard for intelligent education |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220607 |