CN112293842A - Coal mine mining simplex protection device - Google Patents
Coal mine mining simplex protection device Download PDFInfo
- Publication number
- CN112293842A CN112293842A CN202011236434.3A CN202011236434A CN112293842A CN 112293842 A CN112293842 A CN 112293842A CN 202011236434 A CN202011236434 A CN 202011236434A CN 112293842 A CN112293842 A CN 112293842A
- Authority
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- China
- Prior art keywords
- plate
- simplex
- helmet shell
- coal mine
- safety helmet
- 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.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 27
- 238000005065 mining Methods 0.000 title claims abstract description 27
- 230000003139 buffering effect Effects 0.000 claims abstract description 31
- 229920001971 elastomer Polymers 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 abstract description 20
- 238000005286 illumination Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001821 foam rubber Polymers 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B1/00—Hats; Caps; Hoods
- A42B1/04—Soft caps; Hoods
- A42B1/08—Soft caps; Hoods with protection against blows
- A42B1/10—Miners' caps
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B1/00—Hats; Caps; Hoods
- A42B1/24—Hats; Caps; Hoods with means for attaching articles thereto, e.g. memorandum tablets or mirrors
- A42B1/242—Means for mounting detecting, signalling or lighting devices
- A42B1/244—Means for mounting lamps
Landscapes
- Helmets And Other Head Coverings (AREA)
Abstract
The invention discloses a simplex protection device for coal mine mining, which comprises a safety helmet shell and a buffer protection pad, wherein mounting blocks are fixedly arranged on the surfaces of two sides of the safety helmet shell, and supporting rods are slidably arranged at the tops of the mounting blocks. According to the coal mine mining simplex protection device, the supporting rod can move up and down under the action of the sliding mechanism, the damping spring arranged at the bottom of the upper protection plate plays a good role in damping, buffering and supporting for the upper protection plate, meanwhile, the damping spring arranged at the bottom of the movable plate further plays a role in damping for the device, and double damping is achieved, so that damping can be better performed when a worker is impacted, the head of the worker can be prevented from being impacted, when the device is impacted, the helmet shell compresses the rotating rod to move towards two sides on the limiting rod, the second spring is in a stretching state, the second spring pulls back to pull back the buffering protection pad, and the worker can be effectively prevented from being injured due to collision.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a simplex protection device for coal mining.
Background
Generally, when a coal mine is mined, workers must wear safety helmets, and the safety helmets are shallow round helmets made of steel or similar raw materials and worn on the tops of the heads of the workers to prevent impact objects from damaging the heads of the workers. The helmet is composed of a helmet shell, a helmet liner, a lower cheek band and a rear hoop, wherein the helmet shell is hemispherical, firm, smooth and elastic to a certain extent, and the impact and puncture kinetic energy of a hit object are mainly borne by the helmet shell;
the existing safety helmet is simple in structural design and single in function, the existing damping device on the inner side of the safety helmet mostly adopts a common supporting structure or a damping cushion and the like for damping, the damping effect is slightly poor, illumination cannot be carried out, and due to the fact that the general safety helmet only has single-layer protection, the safety performance is not high, and the safety of underground workers cannot be guaranteed.
We have therefore proposed a simplex protection arrangement for coal mining in order to solve the problems set out above.
Disclosure of Invention
The invention aims to provide a coal mine mining simplex protection device, which solves the problems that the safety performance of the conventional coal mine mining simplex protection device provided by the background technology is not high due to the fact that a common safety helmet only has single-layer protection, underground workers cannot be guaranteed, and illumination safety cannot be realized.
In order to achieve the purpose, the invention provides the following technical scheme: a simplex protection device for coal mine mining comprises a safety helmet shell and a buffering protection pad, wherein mounting blocks are fixedly mounted on the surfaces of two sides of the safety helmet shell, a supporting rod is slidably mounted at the top of the mounting block, an upper protection plate is fixedly mounted at the top of the supporting rod, a mounting plate is fixedly mounted at the top of the front edge of the safety helmet shell, a mounting groove is fixedly mounted at the top of the mounting plate, an LED illuminating lamp is detachably mounted in the mounting groove, an adjusting bolt is rotatably mounted on the surface of one side of the mounting groove, a moving block is fixedly mounted at the bottom of the supporting rod and mounted in the mounting block, a first spring is sleeved on the outer portion, close to the bottom, of the supporting rod, the bottom of the first spring is fixedly mounted on the outer surface of the top of the mounting block, the buffering protection, the middle part top fixed mounting of buffering protection pad has the connecting plate, one side of connecting plate is rotated and is installed the rotating chain, the last rotation of rotating chain installs the dwang, the top fixed mounting of dwang has the sliding sleeve, the inside slidable mounting of sliding sleeve has the gag lever post, gag lever post fixed mounting is in the inside of safety helmet shell wall of going up, the opposite side fixed mounting of dwang has the second spring, the bottom fixed mounting of going up the guard plate has the guide bar, the guide bar runs through the inside of going up the guard plate, the middle part slidable mounting of guide bar has the fly leaf, the guide bar runs through the inside of fly leaf, the outside cover of guide bar is equipped with the third spring, the bottom fixed mounting of safety helmet shell has the extension board, one side fixed surface of extension board installs the tie-up area, one side of tie-up area is rotated and is installed and is talkbacked the, one side fixed mounting of extension board has the back guard plate, the inside fixed mounting of back guard plate has the elasticity muscle, one side fixed mounting of elasticity muscle has the elasticity rubber ball, one side of elasticity rubber ball is dug there is the bleeder vent, one side fixed mounting of bleeder vent has the articulamentum, one side fixed mounting of articulamentum has the buffering foam-rubber cushion.
Preferably, guide rods are installed on two sides of the movable plate, and the guide rods penetrate through the movable plate and are in sliding connection with the movable plate.
Preferably, the inside fixed mounting of safety helmet shell has portable power source, just LED light and microphone all with portable power source electric connection of talkbacking.
Preferably, a sliding groove is formed in the mounting block, and the first spring mounted on the support rod has a size larger than that of the sliding groove formed in the mounting block.
Preferably, elastic rubber balls are installed around the inside of the rear protection plate, and the number of the elastic rubber balls connected to the lower surface of each elastic rib is one.
Preferably, the LED illuminating lamp is an angle adjustable device, and an adjusting bolt on the LED illuminating lamp is designed to be of a cross structure.
Preferably, the tightening belt structure comprises an elastic belt, the elastic belt is fixed on the extension plate, a clamping hook is arranged on the elastic belt, and a clamping ring corresponding to the clamping hook is arranged on the other tightening belt.
Preferably, the safety helmet shell is made of high-strength pressure-resistant materials, and the buffering protective pad is made of sponge materials.
Compared with the prior art, the invention has the beneficial effects that: the coal mine mining simplex protection device is convenient for workers to wear, and meanwhile, the supporting and damping effects between the safety helmet inner shell and the safety helmet outer shell are enhanced, so that the safety performance of the safety helmet body is effectively improved;
1. the support rod can move up and down under the action of the sliding mechanism, the damping spring arranged at the bottom of the upper protection plate plays a good role in damping, buffering and supporting the upper protection plate, and the damping spring arranged at the bottom of the movable plate further plays a role in damping the device, so that double damping is realized, better damping can be realized when the device is impacted, and the head part of a worker can be prevented from being injured when the worker is impacted;
2. when the safety helmet is impacted, the shell of the safety helmet compresses the rotating rod to move towards two sides on the limiting rod, the second spring is in a stretching state, and the second spring pulls back to pull the buffering protection pad back to the original position, so that workers can be effectively prevented from being injured due to the impact;
3. the LED lamp is an angle adjustable device, the adjusting bolt on the LED lamp angle adjuster at the upper end is designed to be a cross structure, the adjustment of the illumination angle of the LED lamp can be favorably carried out as required, and the adjusting bolt on the LED lamp angle adjuster enables manual adjustment to be more convenient and rapid as the cross structure is designed.
Drawings
FIG. 1 is a perspective view of a simplex protection device for coal mining in accordance with the present invention;
FIG. 2 is a front cross-sectional view of a simplex protection device for coal mining in accordance with the present invention;
FIG. 3 is a schematic structural diagram of a buffering protection pad of the simplex protection device for coal mining according to the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 2 of a coal mining simplex protection device of the present invention;
FIG. 5 is a front cross-sectional view of a simplex protection device for coal mining in accordance with the present invention;
fig. 6 is a schematic structural diagram of a rear protection plate of the simplex protection device for coal mining.
In the figure: 1. a helmet shell; 2. mounting blocks; 3. a support bar; 4. an upper protection plate; 5. mounting a plate; 6. mounting grooves; 7. an LED lighting lamp; 8. adjusting the bolt; 9. a moving block; 10. a first spring; 11. a connecting plate; 12. a rotating chain; 13. rotating the rod; 14. a sliding sleeve; 15. a limiting rod; 16. a second spring; 17. a guide bar; 18. a movable plate; 19. a third spring; 20. binding a belt; 21. a rear protection plate; 22. an intercom microphone; 23. an extension plate; 24. a buffer protection pad; 25. an elastic rib; 26. an elastic rubber ball; 27. a connecting layer; 28. a buffer sponge cushion; 29. and (4) air holes.
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. 1-6, the present invention provides a technical solution: a simplex protection device for coal mine mining comprises a safety helmet shell 1, an installation block 2, a support rod 3, an upper protection plate 4, an installation plate 5, an installation groove 6, an LED illuminating lamp 7, an adjusting bolt 8, a moving block 9, a first spring 10, a connecting plate 11, a rotating chain 12, a rotating rod 13, a sliding sleeve 14, a limiting rod 15, a second spring 16, a guide rod 17, a moving plate 18, a third spring 19, a binding belt 20, a rear protection plate 21, an intercom microphone 22, an extension plate 23, a buffering protection pad 24, an elastic rib 25, an elastic rubber ball 26, a connecting layer 27, a buffering sponge pad 28 and an air vent 29, wherein the installation block 2 is fixedly installed on the surfaces of two sides of the safety helmet shell 1, the support rod 3 is slidably installed on the top of the installation block 2, the upper protection plate 4 is fixedly installed on the top of the support rod 3, the installation plate 5 is fixedly installed on the top of the safety helmet shell 1, the LED illuminating lamp 7 is detachably mounted in the mounting groove 6, the adjusting bolt 8 is rotatably mounted on the surface of one side of the mounting groove 6, the moving block 9 is fixedly mounted at the bottom of the supporting rod 3, the moving block 9 is mounted in the mounting block 2, the first spring 10 is sleeved on the outer portion, close to the bottom, of the supporting rod 3, the bottom of the first spring 10 is fixedly mounted on the outer surface of the top of the mounting block 2, the buffering and protecting pad 24 is fixedly mounted in the helmet shell 1, the connecting plate 11 is fixedly mounted at the top of the middle portion of the buffering and protecting pad 24, the rotating chain 12 is rotatably mounted on one side of the connecting plate 11, the rotating rod 13 is rotatably mounted on the rotating chain 12, the sliding sleeve 14 is fixedly mounted at the top of the rotating rod 13, the limiting rod 15 is slidably mounted in the sliding sleeve 14, the limiting rod 15 is fixedly mounted on, go up the bottom fixed mounting of protection plate 4 and have guide bar 17, guide bar 17 runs through the inside of protection plate 4, the mid portion slidable mounting of guide bar 17 has fly leaf 18, guide bar 17 runs through the inside of fly leaf 18, the outside cover of guide bar 17 is equipped with third spring 19, the bottom fixed mounting of safety helmet shell 1 has extension board 23, one side fixed surface of extension board 23 installs tie-up area 20, one side of tie-up area 20 is rotated and is installed talkback microphone 22, one side fixed mounting of extension board 23 has rear protection plate 21, the inside fixed mounting of rear protection plate 21 has elastic rib 25, one side fixed mounting of elastic rib 25 has elastic rubber ball 26, air vent 29 has been dug to one side of elastic rubber ball 26, one side fixed mounting of air vent 29 has articulamentum 27, one side fixed mounting of articulamentum 27 has buffering foam-rubber cushion 28.
The guide rods 17 are installed on two sides of the movable plate 18, and the guide rods 17 penetrate through the movable plate 18 and are in sliding connection with the movable plate 18, so that the downward pressure of the movable plate 18 is reduced, and the shock generated when the movable plate is impacted can be buffered.
The inside fixed mounting of safety helmet shell 1 has portable power source, and LED light 7 and talkback microphone 22 all with portable power source electric connection, optimize overall structure.
The inside of installing block 2 is excavated there is the sliding tray, and the specification of the first spring 10 of installation on the bracing piece 3 is greater than the inside specification of the sliding tray that excavates of installing block 2, has played good shock attenuation buffering and supported effect.
LED light 7 is angle regulation device, and adjusting bolt 8 on the LED light 7 is the setting of cross structural design, is favorable to carrying out the regulation of LED light illumination 7 angles as required, and adjusting bolt 8 makes more convenient quick of manual regulation for cross structural design moreover.
The structure of the binding band 20 comprises an elastic band, the elastic band is fixed on the extension plate 23, a clamping hook is arranged on the elastic band, and a clamping ring corresponding to the clamping hook is arranged on the other binding band 20, so that the binding band can be worn conveniently.
The safety helmet shell 1 is made of high-strength pressure-resistant materials, and the buffering and protecting pad 24 is made of sponge materials, so that the safety helmet is more comfortable to wear by workers, and the heads of the workers are protected.
The working principle of the embodiment is as follows: when the simplex protection device for coal mining is used, firstly, as shown in fig. 1-3, when the exterior of the helmet shell 1 is impacted, the helmet shell 1 compresses the rotating rod 13 to move towards two sides on the guide rod 17, the second spring 16 is in a stretching state, and the second spring 16 pulls back to pull the buffering protection pad 24 to the original position, so that workers can be effectively prevented from being injured due to collision;
meanwhile, as shown in fig. 1-2 and 4, when the outside of the helmet shell 1 is impacted, the protection plate 4 is under pressure, the support rod 3 moves up and down, the first spring 10 arranged at the bottom of the upper protection plate 4 can generate upward thrust on the support rod 3, and meanwhile, the upper protection plate 4 has good damping, buffering and supporting functions, the second spring 16 is arranged at the bottom of the movable plate 18, the helmet shell 1 compresses the rotating rod 13 to move towards two sides on the guide rod 17, the second spring 16 is in a stretching state, the second spring 16 pulls back to pull the buffering protection pad 24 to perform in-situ double damping, so that better damping can be performed when the helmet shell is impacted, and a worker can be prevented from injuring the head when the helmet shell is impacted;
according to the invention, as shown in fig. 1, when the angle of the LED illuminating lamp 7 needs to be adjusted, the adjusting bolt 8 is rotated, the LED illuminating lamp 7 is adjusted to a proper angle, the adjusting bolt 8 is rotated again to fix the LED illuminating lamp 7, and the adjusting bolt 8 on the LED illuminating lamp 7 is arranged in a cross structure design, so that the adjustment of the angle of the illumination of the LED illuminating lamp 7 can be conveniently and quickly performed according to the needs;
according to the invention, as shown in fig. 1 and fig. 6, the elastic rubber ball 26 arranged inside the rear protection plate 21 is matched with the elastic rib 25 to improve safety guarantee during operation, when small ores and the like fall on the safety helmet, shock absorption and buffering are timely provided to prevent injury to workers, and the buffering sponge cushion 28 also improves the buffering protection for the head.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a coal mine mining simplex protection device, includes safety helmet shell (1) and buffering protection pad (24), its characterized in that: the safety helmet is characterized in that mounting blocks (2) are fixedly mounted on the surfaces of two sides of the safety helmet shell (1), a supporting rod (3) is slidably mounted on the top of each mounting block (2), an upper protection plate (4) is fixedly mounted on the top of each supporting rod (3), a mounting plate (5) is fixedly mounted on the top of the front edge of the safety helmet shell (1), a mounting groove (6) is fixedly mounted on the top of each mounting plate (5), an LED illuminating lamp (7) is detachably mounted in each mounting groove (6), an adjusting bolt (8) is rotatably mounted on the surface of one side of each mounting groove (6), a moving block (9) is fixedly mounted at the bottom of each supporting rod (3), the moving block (9) is mounted in each mounting block (2), a first spring (10) is sleeved on the outer portion, close to the bottom, of each supporting rod (3), and the bottom of each first spring (, the safety helmet shell (1) is internally and fixedly provided with a buffering and protecting pad (24), the middle part of the buffering and protecting pad (24) is fixedly provided with a connecting plate (11) at the top, one side of the connecting plate (11) is rotated to be provided with a rotating chain (12), the rotating chain (12) is rotated to be provided with a rotating rod (13), the top of the rotating rod (13) is fixedly provided with a sliding sleeve (14), the internal sliding of the sliding sleeve (14) is provided with a limiting rod (15), the limiting rod (15) is fixedly arranged on the upper surface wall in the safety helmet shell (1), the opposite side of the rotating rod (13) is fixedly provided with a second spring (16), the bottom of the upper protecting plate (4) is fixedly provided with a guide rod (17), the guide rod (17) runs through the internal part of the upper protecting plate (4), and the middle part of the guide rod (17) is provided with a movable, the guide rod (17) penetrates through the inner part of the movable plate (18), a third spring (19) is sleeved outside the guide rod (17), an extension plate (23) is fixedly arranged at the bottom of the helmet shell (1), a binding belt (20) is fixedly arranged on the surface of one side of the extension plate (23), one side of the binding belt (20) is rotatably provided with an intercom microphone (22), one side of the extension plate (23) is fixedly provided with a rear protection plate (21), an elastic rib (25) is fixedly arranged in the rear protection plate (21), an elastic rubber ball (26) is fixedly arranged on one side of the elastic rib (25), one side of the elastic rubber ball (26) is provided with an air hole (29), one side of the air hole (29) is fixedly provided with a connecting layer (27), one side of the connecting layer (27) is fixedly provided with a buffering sponge cushion (28).
2. The coal mine mining simplex protection device of claim 1, wherein: guide rods (17) are mounted on two sides of the movable plate (18), and the guide rods (17) penetrate through the movable plate (18) and are connected with the movable plate in a sliding mode.
3. The coal mine mining simplex protection device of claim 1, wherein: the inside fixed mounting of safety helmet shell (1) has portable power source, just LED light (7) and talkback microphone (22) all with portable power source electric connection.
4. The coal mine mining simplex protection device of claim 1, wherein: the inside of installation piece (2) is cut and is had the sliding tray, just the specification of the first spring (10) of installation on bracing piece (3) is greater than the specification of the sliding tray of cutting in installation piece (2).
5. The coal mine mining simplex protection device of claim 1, wherein: elastic rubber balls (26) are installed around the inside of the rear protection plate (21), and the number of the elastic rubber balls (26) connected to the lower surface of each elastic rib (25) is one.
6. The coal mine mining simplex protection device of claim 1, wherein: the LED illuminating lamp (7) is an angle adjustable device, and an adjusting bolt (8) on the LED illuminating lamp (7) is arranged in a cross structure design.
7. The coal mine mining simplex protection device of claim 1, wherein: the structure of the binding band (20) comprises an elastic band, the elastic band is fixed on the extension plate (23), a clamping hook is arranged on the elastic band, and a clamping ring corresponding to the clamping hook is arranged on the binding band (20).
8. The coal mine mining simplex protection device of claim 1, wherein: the safety helmet shell (1) is made of high-strength pressure-resistant materials, and the buffering protective pad (24) is made of sponge materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011236434.3A CN112293842A (en) | 2020-11-09 | 2020-11-09 | Coal mine mining simplex protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011236434.3A CN112293842A (en) | 2020-11-09 | 2020-11-09 | Coal mine mining simplex protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112293842A true CN112293842A (en) | 2021-02-02 |
Family
ID=74326504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011236434.3A Pending CN112293842A (en) | 2020-11-09 | 2020-11-09 | Coal mine mining simplex protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112293842A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114617319A (en) * | 2022-02-14 | 2022-06-14 | 河南江恒建筑工程有限公司 | Worker safety arrangement in engineering is built in room |
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| CN207604543U (en) * | 2017-11-14 | 2018-07-13 | 姜涛 | A kind of multifunctional safety helmet for construction |
| CN208064585U (en) * | 2017-11-03 | 2018-11-09 | 邓士林 | A kind of electrical safety helmet that security performance is high |
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| CN209825334U (en) * | 2019-05-10 | 2019-12-24 | 青岛温泉建设集团有限公司 | Safety device for building site |
| CN210960591U (en) * | 2019-09-30 | 2020-07-10 | 甘肃建投科技研发有限公司 | Building site intelligent safety cap |
| CN210988448U (en) * | 2019-08-22 | 2020-07-14 | 国家电网有限公司 | Sweat removing device for safety helmet |
| CN211153997U (en) * | 2020-01-08 | 2020-08-04 | 张见 | Safety helmet for coal mine |
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2020
- 2020-11-09 CN CN202011236434.3A patent/CN112293842A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207084243U (en) * | 2017-08-09 | 2018-03-13 | 高彦杰 | A kind of multi-use architecture safety cap |
| CN208064585U (en) * | 2017-11-03 | 2018-11-09 | 邓士林 | A kind of electrical safety helmet that security performance is high |
| CN207604543U (en) * | 2017-11-14 | 2018-07-13 | 姜涛 | A kind of multifunctional safety helmet for construction |
| CN107927983A (en) * | 2017-11-29 | 2018-04-20 | 安徽尚易信息技术有限公司 | A kind of multifunctional helmet based on RFID |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114617319A (en) * | 2022-02-14 | 2022-06-14 | 河南江恒建筑工程有限公司 | Worker safety arrangement in engineering is built in room |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210202 |