CN110916899A - Protective mask for electric welding - Google Patents

Protective mask for electric welding Download PDF

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Publication number
CN110916899A
CN110916899A CN201911071349.3A CN201911071349A CN110916899A CN 110916899 A CN110916899 A CN 110916899A CN 201911071349 A CN201911071349 A CN 201911071349A CN 110916899 A CN110916899 A CN 110916899A
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CN
China
Prior art keywords
fixedly connected
mask
hole
cover
rotating
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.)
Withdrawn
Application number
CN201911071349.3A
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Chinese (zh)
Inventor
汪繁荣
向堃
彭禄
宋强
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Hubei University of Technology
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Hubei University of Technology
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Publication date
Application filed by Hubei University of Technology filed Critical Hubei University of Technology
Priority to CN201911071349.3A priority Critical patent/CN110916899A/en
Publication of CN110916899A publication Critical patent/CN110916899A/en
Withdrawn legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/04Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
    • A61F9/06Masks, shields or hoods for welders
    • A61F9/068Masks, shields or hoods for welders with supply or suction of gas, air or smoke inside or outside the welding hood
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06Protective devices for the ears
    • A61F11/14Protective devices for the ears external, e.g. earcaps or earmuffs

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Biophysics (AREA)
  • Otolaryngology (AREA)
  • Psychology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The invention belongs to the technical field of power equipment, in particular to a protective mask for electric welding, which aims at solving the problem that the existing electric welding protective mask is usually handheld and cannot block harmful substances. The invention can cover the head by the rotation of the rotating cover, so that the device can be worn on the head, thereby being convenient to use, simultaneously enabling the breath to flow through the two parts, adsorbing harmful substances by the active carbon during the breath and avoiding the active carbon from being wetted by moisture during the breath.

Description

Protective mask for electric welding
Technical Field
The invention relates to the technical field of power equipment, in particular to a protective mask for electric welding.
Background
The welding mask effectively prevents splash and harmful body etc. that the operation appears from causing the infringement to the face, reduce the emergence of skin burn disease, the sight glass of installing on the face guard has dual filtering, avoid ultraviolet ray and infrared ray harmful radiation that electric arc produced, the emergence of prevention occupational disease, but current welding mask needs the one-hand to grip usually, can influence staff's operation like this, and current welding mask does not set up harmful gas protection device, just so cause partial harmful gas to get into in the face guard, influence staff's health.
Through search, the Chinese patent with application number 201120175680.2 discloses a welding mask, which comprises a mask shell, an upper view mirror frame and a spring plate snap ring. The welding mask in the above patent has the following disadvantages: the device can clamp the glass of the sight glass through the clamping ring and the extrusion elastic sheet, so that the sight glass is fixed stably and is easy to replace, but the device cannot block harmful gas.
Disclosure of Invention
The invention provides a protective mask for electric welding based on the technical problem that the existing electric welding protective mask is usually handheld and cannot block harmful substances.
The invention provides a protective mask for electric power welding, which comprises a mask body, wherein a rotating cover is rotatably connected between the inner walls of two sides of the mask body, two first through holes are formed in one side of the mask body, a connecting body is fixedly connected to the mask body at the first through holes, a second through hole is formed in one side of the connecting body, activated carbon is arranged between the inner walls of the two sides of the connecting body, a third through hole is formed in one side of the connecting body, a fixing frame is fixedly connected to the inner wall of one side of the connecting body, a first spring is fixedly connected to the inner wall of the fixing frame, the first spring extends to the outside of the connecting body at the third through hole, and a rubber sheet is fixedly connected to one side.
Preferably, two fourth through holes are formed in one side of the cover body, check valves are arranged at the fourth through holes of the cover body, and the direction of each check valve is from the concave surface of the cover body to the convex surface of the cover body.
Preferably, square through hole has been seted up at the middle part of the cover body, the cover body is the arc at square through hole's bottom fixedly connected with goggles, goggles's material is glass and metallic oxide, the spout has been seted up on the top of the cover body, the cover body is equipped with the sliding block in spout department, the bottom fixedly connected with of sliding block removes dust the pole, it is the U-shaped to remove dust the pole, the inner wall that removes dust the pole is equipped with the sponge cloth, goggles are located between the both sides inner wall that removes dust the pole.
Preferably, be equipped with first torsion spring between the rotation cover and the cover body, the bar through-hole has been seted up on the top of rotating the cover, the bottom fixedly connected with pivot of rotating the cover, the outer wall fixedly connected with fixture block of pivot, be equipped with second torsion spring between fixture block and the pivot, the fixture block extends to the top of rotating the cover in bar through-hole department, fixedly connected with elastic webbing between the both sides inner wall of rotation cover.
Preferably, the bottom end of the cover body is fixedly connected with a connecting ring, one side of the connecting ring is fixedly connected with a sponge sheet, the inner wall of the bottom end of one side of the cover body is fixedly connected with four second springs, the top ends of the four second springs are fixedly connected with the same rubber pad, and one side of the cover body is fixedly connected with a fixed cover.
Preferably, the both sides of the cover body all are equipped with the turning block, the bar through-hole has been seted up at the middle part of turning block, the turning block is equipped with the dwang in bar through-hole department, the outside cover of dwang is equipped with the dead lever, dead lever and bar through-hole looks adaptation, the rotatory piece of one end fixedly connected with of dwang, the one end of dwang extends to the one side of rotating the cover, the one end fixedly connected with syllable-dividing earmuff of dwang, be equipped with the third spring between the inner wall of syllable-dividing earmuff and rotation cover.
Preferably, the top end of the rotating cover is fixedly provided with a storage battery, the top end of the rotating cover is provided with a circular through hole, the rotating cover is provided with a fan at the circular through hole, and the fan is electrically connected with the storage battery.
The beneficial effects of the invention are as follows:
1. by arranging the cover body, the connector, the activated carbon, the fixing frame, the rubber sheet, the first spring and the one-way valve, when the device is used, when the device inhales, the rubber sheet pulls the first spring, gas enters through the activated carbon through the connector, harmful gas generated by electric welding is adsorbed by the activated carbon, and when the device exhales, the gas is discharged through the one-way valve, so that the phenomenon that the adsorption capacity of the device is reduced because moisture in the exhaled gas is absorbed by the activated carbon is avoided;
2. by arranging the goggles, the dust removal rod and the sliding block, the sliding block can drive the dust removal rod to slide, and the dust removal rod slides left and right so as to erase dust on the goggles, so that the use is simple and convenient;
3. by arranging the connecting ring, the sponge sheet, the rotating cover, the elastic belt, the rotating shaft, the clamping block, the second spring, the rubber pad and the fixing cover, the chin is placed on the rubber pad, the second spring enables two sides of the rubber pad to tilt, so that the rubber pad can be tightly attached to the skin, the fixing cover can enable respiratory gas to circulate through the device, the device can be fixed to the head through the rotating cover, the elastic belt, the rotating shaft and the clamping block, the neck does not feel uncomfortable when the device is worn, and the comfort level of the device is enhanced;
4. by arranging the fixed rod, the rotating block, the third spring and the sound-insulating earmuffs, when noise is generated during operation, the rotating rod is driven to rotate by rotating the rotating block, the rotating rod drives the fixed rod to rotate, when the fixed rod enters the strip-shaped through hole, the third spring pulls the rotating rod, the sound-insulating earmuffs pop out to cover ears, so that the noise can be reduced, when the sound-insulating earmuffs are not used, the rotating block is pulled to drive the rotating rod and the fixed rod to move, when the fixed rod is moved out of the rotating block, the rotating block is rotated to enable the fixed rod;
5. through having set up fan and battery, when rotating the cover overhead, start the fan, the battery can provide the power for the fan, and when the fan rotated, the inside air that drives the cover body flowed to accelerate the heat and give off.
Drawings
Fig. 1 is a schematic front view of a protective mask for electric welding according to embodiment 1;
fig. 2 is a schematic front view of a protective mask for electric welding according to embodiment 1;
fig. 3 is a schematic rear view of a protective mask for electric welding according to embodiment 1;
FIG. 4 is a schematic sectional view of a connecting body of a protective mask for electric welding according to example 1;
FIG. 5 is a schematic side view of a rotating mask of a protective mask for electric welding according to embodiment 1;
fig. 6 is a schematic top view of a rotating hood of a protective mask for electric welding according to embodiment 2.
In the figure: the dust removing mask comprises a mask body 1, a connecting ring 2, a sponge sheet 201, a connecting body 3, activated carbon 301, a fixing frame 302, a rubber sheet 303, a first spring 304, goggles 4, a dust removing rod 5, a sliding block 6, a rotating cover 7, an elastic belt 701, a rotating shaft 702, a clamping block 703, a rotating block 8, a fixing rod 9, a rotating rod 10, a rotating block 11, a second spring 12, a rubber pad 13, a one-way valve 14, a fixing cover 15, a third spring 16, a sound insulation earmuff 17, a fan 18 and a storage battery 19.
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.
Example 1
Referring to fig. 1-5, a protective mask for electric power welding, including the cover body 1, it is connected with rotation cover 7 to rotate between the both sides inner wall of the cover body 1, two first through-holes have been seted up to one side of the cover body 1, the cover body 1 all has welded connector 3 in first through-hole department, the second through-hole has been seted up to one side of connector 3, be equipped with active carbon 301 between the both sides inner wall of connector 3, the third through-hole has been seted up to one side of connector 3, one side inner wall welding of connector 3 has mount 302, the inner wall welding of mount 302 has first spring 304, first spring 304 extends to the outside of connector 3 in third through-hole department, the welding of one side of first spring 304 has rubber slab 303.
According to the invention, two fourth through holes are formed in one side of the cover body 1, the check valves 14 are arranged at the fourth through holes of the cover body 1, the direction of each check valve 14 is from the concave surface of the cover body 1 to the convex surface of the cover body 1, when the device is used, when the device inhales, the rubber sheet 303 pulls the first spring 304, gas passes through the activated carbon 301 through the connecting body 3 to enter, harmful gas generated by electric welding is adsorbed by the activated carbon 301, and when the device exhales, the gas is exhausted through the check valves 14, so that moisture in the exhaled gas is prevented from being absorbed by the activated carbon 301.
Wherein, square through hole has been seted up at the middle part of the cover body 1, the cover body 1 has welded goggles 4 in square through hole's bottom, goggles 4 is the arc, goggles 4's material is glass and metallic oxide, the spout has been seted up on the top of the cover body 1, the cover body 1 is equipped with sliding block 6 in spout department, sliding block 6's bottom welding has dust removal pole 5, dust removal pole 5 is the U-shaped, the inner wall of dust removal pole 5 is equipped with the sponge cloth, goggles 4 are located between the both sides inner wall of dust removal pole 5, can drive dust removal pole 5 through slip sliding block 6 and slide, thereby dust removal pole 5 horizontal slip can be with the dust on goggles 4 and erase.
Wherein, be equipped with first torsion spring between the cover body 1 rotates cover 7 and the cover body, the bar through-hole has been seted up on the top of rotating cover 7, the bottom welding of rotating cover 7 has pivot 702, the outer wall welding of pivot 702 has fixture block 703, be equipped with second torsion spring between fixture block 703 and the pivot 702, fixture block 703 extends to the top of rotating cover 7 at bar through-hole department, the welding has elastic webbing 701 between the both sides inner wall of rotating cover 7.
Wherein, the bottom welding of the cover body 1 has the go-between 2, one side of go-between 2 bonds there is sponge piece 201, the welding of one side bottom inner wall of the cover body 1 has four second springs 12, four the welding of the top of second spring 12 has same rubber pad 13, the welding of one side of the cover body 1 has fixed cover 15, through placing the chin on rubber pad 13, second spring 12 makes the both sides perk of rubber pad 13 to can make rubber pad 13 hug closely skin, fixed cover 15 can make respiratory gaseous circulation of passing through the device, can make the device be fixed in the head through rotating cover 7, elastic webbing 701, pivot 702 and fixture block 703.
Wherein, the both sides of the cover body 1 all are equipped with the turning block 8, the bar through-hole has been seted up at the middle part of turning block 8, turning block 8 is equipped with dwang 10 in bar through-hole department, the outside cover of dwang 10 is equipped with dead lever 9, dead lever 9 and bar through-hole looks adaptation, the one end welding of dwang 10 has rotatory piece 11, the one end of dwang 10 extends to one side of rotating the cover 7, the one end welding of dwang 10 has sound insulation ear muff 17, be equipped with third spring 16 between the inner wall of sound insulation ear muff and rotating the cover 7, when the noise emission during the operation, drive dwang 10 to rotate through rotating rotatory piece 11, dwang 10 drives dead lever 9 to rotate, when dead lever 9 gets into the bar through-hole, third spring 16 stimulates dwang 10, sound insulation ear muff 17 pops out, covers the ear to can the noise reduction, the rotating block 11 is pulled to drive the rotating rod 10 and the fixing rod 9 to move, and when the fixing rod 9 moves out of the rotating block 8, the rotating block 11 is rotated to enable the fixing rod 9 to deviate from the through hole, and then the fixing can be achieved.
When the device is used, the device is worn on the head, the chin is placed on the rubber pad 13, the two sides of the rubber pad 13 are tilted by the second spring 12, so that the rubber pad 13 can be tightly attached to the skin, the fixed cover 15 can enable the respiratory gas to circulate through the device, the device can be fixed on the head by the rotating cover 7, the elastic belt 701, the rotating shaft 702 and the clamping block 703, the neck does not feel uncomfortable when the device is worn through the connecting ring 2 and the sponge sheet 201, when the device is used, the rubber sheet 303 pulls the first spring 304 when breathing in, the gas penetrates through the activated carbon 301 through the connecting body 3, the generated harmful gas is adsorbed by the activated carbon 301, when breathing out, the gas is discharged through the one-way valve 14, the moisture in the exhaled gas is prevented from being absorbed by the activated carbon 301, the adsorption capacity of the activated carbon 301 is reduced, the dust removal rod 5 can be driven to slide by the sliding block 6, the dust removal rod 5 slides left and right, so that the dust, when the noise is sent out during the operation, through rotating rotatory piece 11 and driving dwang 10 and rotate, dwang 10 drives dead lever 9 and rotates, when dead lever 9 gets into the bar through-hole, third spring 16 stimulates dwang 10, sound insulation earmuff 17 pops out, cover the ear, thereby can the noise reduction, when not needing sound insulation earmuff 17, the rotatory piece 11 of pulling drives dwang 10 and dead lever 9 and removes, when dead lever 9 shifts out turning block 8, rotate rotatory piece 11 and make dead lever 9 and through-hole skew, can fix.
Example 2
Referring to fig. 6, a protection mask for electric power welding, this embodiment compares in embodiment 1, in order to make this device strengthen its radiating effect, the top fixed mounting who rotates cover 7 has battery 19, the circular through-hole has been seted up on the top that rotates cover 7, it is equipped with fan 18 in circular through-hole department to rotate cover 7, electric connection between fan 18 and the battery 19, when rotating cover 7 cover overhead when rotating, start fan 18, battery 19 can provide the power for fan 18, and when fan 18 rotated, the inside air that drives the cover body 1 flows to accelerate the heat dissipation.
When the device is used, the device is worn on the head, the chin is placed on the rubber pad 13, the two sides of the rubber pad 13 are tilted by the second spring 12, so that the rubber pad 13 can be tightly attached to the skin, the fixed cover 15 can enable the respiratory gas to circulate through the device, the device can be fixed on the head by the rotating cover 7, the elastic belt 701, the rotating shaft 702 and the clamping block 703, the neck does not feel uncomfortable when the device is worn through the connecting ring 2 and the sponge sheet 201, when the device is used, the rubber sheet 303 pulls the first spring 304 when breathing in, the gas penetrates through the activated carbon 301 through the connecting body 3, the generated harmful gas is adsorbed by the activated carbon 301, when breathing out, the gas is discharged through the one-way valve 14, the moisture in the exhaled gas is prevented from being absorbed by the activated carbon 301, the adsorption capacity of the activated carbon 301 is reduced, the dust removal rod 5 can be driven to slide by the sliding block 6, the dust removal rod 5 slides left and right, so that the dust, when the noise is sent out during the operation, through rotating rotatory piece 11 and driving dwang 10 and rotate, dwang 10 drives dead lever 9 and rotates, when dead lever 9 gets into the bar through-hole, third spring 16 stimulates dwang 10, sound insulation earmuff 17 pops out, cover the ear, thereby can the noise reduction, when not needing sound insulation earmuff 17, the rotatory piece 11 of pulling drives dwang 10 and dead lever 9 and removes, when dead lever 9 shifts out turning block 8, rotate rotatory piece 11 and make dead lever 9 and through-hole skew, can fix.
When the rotating cover 7 is rotated to cover the head, the fan 18 is started, the storage battery 19 can provide power for the fan 18, and when the fan 18 rotates, the internal air of the cover body 1 is driven to flow, so that the heat dissipation is accelerated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. A protective mask for electric welding comprises a mask body (1) and is characterized in that a rotating mask (7) is rotatably connected between the inner walls of the two sides of the mask body (1), one side of the cover body (1) is provided with two first through holes, the cover body (1) is fixedly connected with connecting bodies (3) at the first through holes, a second through hole is arranged on one side of the connecting body (3), active carbon (301) is arranged between the inner walls of the two sides of the connecting body (3), a third through hole is arranged on one side of the connecting body (3), a fixing frame (302) is fixedly connected with the inner wall of one side of the connecting body (3), a first spring (304) is fixedly connected with the inner wall of the fixed frame (302), the first spring (304) extends to the outside of the connecting body (3) at the third through hole, one side of the first spring (304) is fixedly connected with a rubber sheet (303).
2. The protective mask for electric welding according to claim 1, wherein two fourth through holes are formed in one side of the mask body (1), one-way valves (14) are arranged at the fourth through holes of the mask body (1), and the direction of the one-way valves (14) is from the concave surface of the mask body (1) to the convex surface of the mask body (1).
3. The protective mask for electric power welding according to claim 1, wherein a square through hole is formed in the middle of the mask body (1), the mask body (1) is fixedly connected with goggles (4) at the bottom ends of the square through hole, the goggles (4) are arc-shaped, the goggles (4) are made of glass and metal oxide, a sliding groove is formed in the top end of the mask body (1), a sliding block (6) is arranged at the sliding groove of the mask body (1), a dust removing rod (5) is fixedly connected to the bottom end of the sliding block (6), the dust removing rod (5) is U-shaped, sponge cloth is arranged on the inner wall of the dust removing rod (5), and the goggles (4) are arranged between the inner walls of two sides of the dust removing rod (5).
4. The protective mask for electric welding according to claim 1, wherein a first torsion spring is arranged between the rotating cover (7) and the cover body (1), a strip-shaped through hole is formed in the top end of the rotating cover (7), a rotating shaft (702) is fixedly connected to the bottom end of the rotating cover (7), a clamping block (703) is fixedly connected to the outer wall of the rotating shaft (702), a second torsion spring is arranged between the clamping block (703) and the rotating shaft (702), the clamping block (703) extends to the top end of the rotating cover (7) at the strip-shaped through hole, and an elastic band (701) is fixedly connected between the inner walls of the two sides of the rotating cover (7).
5. The protective mask for electric welding according to claim 1, wherein the bottom end of the mask body (1) is fixedly connected with a connecting ring (2), one side of the connecting ring (2) is fixedly connected with a sponge sheet (201), the inner wall of the bottom end of one side of the mask body (1) is fixedly connected with four second springs (12), the top ends of the four second springs (12) are fixedly connected with the same rubber pad (13), and one side of the mask body (1) is fixedly connected with a fixed mask (15).
6. The protective mask for electric power welding as claimed in claim 5, wherein the two sides of the mask body (1) are provided with a rotation block (8), a bar-shaped through hole is formed in the middle of the rotation block (8), a rotation rod (10) is arranged at the bar-shaped through hole of the rotation block (8), a fixing rod (9) is sleeved outside the rotation rod (10), the fixing rod (9) and the bar-shaped through hole are matched, one end of the rotation rod (10) is fixedly connected with a rotation block (11), one end of the rotation rod (10) extends to one side of the rotation mask (7), one end of the rotation rod (10) is fixedly connected with a sound-insulating earmuff (17), and a third spring (16) is arranged between the sound-insulating earmuff and the inner wall of the rotation mask (7).
7. The protective mask for electric power welding according to any one of claims 1-6, wherein a storage battery (19) is fixedly mounted at the top end of the rotating cover (7), a circular through hole is formed at the top end of the rotating cover (7), a fan (18) is arranged at the circular through hole of the rotating cover (7), and the fan (18) is electrically connected with the storage battery (19).
CN201911071349.3A 2019-11-05 2019-11-05 Protective mask for electric welding Withdrawn CN110916899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911071349.3A CN110916899A (en) 2019-11-05 2019-11-05 Protective mask for electric welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911071349.3A CN110916899A (en) 2019-11-05 2019-11-05 Protective mask for electric welding

Publications (1)

Publication Number Publication Date
CN110916899A true CN110916899A (en) 2020-03-27

Family

ID=69852359

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911071349.3A Withdrawn CN110916899A (en) 2019-11-05 2019-11-05 Protective mask for electric welding

Country Status (1)

Country Link
CN (1) CN110916899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112294533A (en) * 2020-11-05 2021-02-02 江苏美信光电科技有限公司 Portable manual electric arc welding gas defense dustproof welding mask

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112294533A (en) * 2020-11-05 2021-02-02 江苏美信光电科技有限公司 Portable manual electric arc welding gas defense dustproof welding mask

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Application publication date: 20200327

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