Secondary mask independent adjusting structure of welding helmet

Abstract

The invention provides a secondary mask independent adjusting structure of a welding helmet. The problem that the visual angle is limited due to linkage adjustment of a double-layer mask is mainly solved. The structure comprises a welding mask, a splash-proof mask and a welding cap which are hinged through two groups of symmetrical overturning assemblies. When the welding mask of the independent adjusting structure is turned over, the first limiting boss is separated from the groove and then engaged with the groove to achieve step adjustment, and when the splash-proof mask is turned over, the second limiting boss is independently separated from the groove and then engaged with the two masks to be independently adjusted to different angles and automatically locked. The structure improves the view flexibility in the welding process.

Description

Technical Field

[0001] The invention relates to a two-level mask independent adjustment structure of a welding helmet. Background Art

[0002] Traditional welding helmets usually adopt a single-layer mask structure or a linked double-layer mask. However, existing welding helmets have the following defects: (1) The splash shield is linked with the main mask, resulting in a limited adjustment angle; (2) The mask needs to be flipped as a whole when frequently switching between welding and observation states; (3) The synchronous adjustment of the double masks cannot adapt to the needs of complex working conditions.

[0003] The patent with application number 202122873394.X proposes an air purification air intake system for a welding helmet; it includes an air filtering device, a connecting hose and a welding helmet air inlet duct mechanism; a fan chamber and a filter chamber are provided inside the shell of the air filtering device, and external air enters the filter chamber of the shell through the filtering mechanism; the fan mechanism is installed in the fan chamber of the shell, and the battery mechanism includes a power box and a battery body, and the battery body powers the motor; the front side of the air inlet pipe body of the welding helmet air inlet duct mechanism has an air outlet, and the rear side of the air inlet pipe body has an air inlet, one end of the splint is hinged to the side wall of the air inlet pipe body, and the screw of the clamping bolt passes through the splint and is threadedly engaged with the side wall of the air inlet pipe body; the air outlet pipe of the fan mechanism of the air filtering device and the air inlet of the air inlet pipe body of the welding helmet air inlet duct mechanism are connected by a connecting hose.

[0004] However, the welding cap in the above patent technology is a single-layer mask and cannot be adjusted. It cannot solve the problem of the splash shield accidentally drooping and affecting the field of vision in the prior art, and it also does not provide any inspiration for solving the problem of damaging the position of the splash shield when adjusting the angle of the main mask. Summary of the Invention

[0005] The object of the present invention is to provide a two-stage independent adjustment structure of the mask of a welding helmet to solve the problems raised in the above background technology:

[0006] (1) How to improve the technical difficulties of independent angle adjustment and precise positioning of double-layer masks and eliminate the linkage defects of existing technologies.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A two-stage mask independent adjustment structure for a welding helmet, the welding helmet comprises a welding mask, a splash shield and a welding cap, the splash shield and the welding mask are hinged to the welding cap, and the welding mask is located outside the splash shield;

[0009] A first hinge portion is provided on each side of the welding mask, a first hinge hole is opened in the center of the first hinge portion, and a plurality of first limiting bosses are provided on the first hinge portion on the inner side wall of the welding mask, and the plurality of first limiting bosses are evenly distributed along the axis direction of the first hinge hole.

[0010] A second hinge portion is provided on each side of the splash shield, a second hinge hole is opened in the center of the second hinge portion, and a plurality of second limiting bosses are provided on the second hinge portion on the inner side wall of the splash shield, and the plurality of second limiting bosses are evenly spaced along the axial direction of the second hinge hole.

[0011] A third hinge portion is also provided on both sides of the welding cap, a third hinge hole is opened in the center of the third hinge portion, and a plurality of second limiting grooves are provided on the outer wall of the welding cap, and the plurality of second limiting grooves are evenly distributed along the axis direction of the third hinge hole.

[0012] The welding mask, the splash shield and the welding cap are hingedly connected by two sets of flip assemblies, and the two sets of flip assemblies, the two first hinge holes of the welding mask, the two second hinge holes of the splash shield and the two third hinge holes of the welding cap are in a one-to-one correspondence. The flip assembly includes a rotating shaft and a limiting rotating sleeve, and the limiting rotating sleeve passes through the corresponding second hinge hole of the splash shield, and the side wall of the limiting rotating sleeve on the outside of the splash shield extends outwardly with an outer convex ring portion, and the end surface of the outer convex ring portion away from the splash shield is provided with several first limiting grooves along the axial direction of the limiting rotating sleeve. The several first limiting grooves are evenly distributed circumferentially at intervals along the axial direction of the limiting rotating sleeve, and the several first limiting grooves of the limiting rotating sleeve can cooperate with the several first limiting bosses of the welding mask, and the several second limiting grooves of the third hinge portion can cooperate with the several second limiting bosses of the splash shield. A through hole cooperating with the rotating shaft is opened in the center of the limiting rotating sleeve, and the rotating shaft sequentially passes through the first hinge hole corresponding to the first hinge portion, the through hole of the limiting rotating sleeve and the third hinge hole of the third hinge portion.

[0013] On the basis of the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, it also includes a reset spring, which includes a spring body, two first spring-back sheets and two second spring-back sheets. The spring body rests on the welding cap, and the two first spring-back sheets cooperate with the inner end of the rotating shaft. The two first spring-back sheets act on the rotating shaft to have a tendency to move toward the inside of the welding cap. The second spring-back sheet cooperates with the inner end of the limiting rotary sleeve, and the two second spring-back sheets act on the limiting rotary sleeve to have a tendency to move toward the inside of the welding cap.

[0015] Furthermore, a first slot is opened at the inner end of the rotating shaft, and the two first elastic plates of the reset spring engage with the first slot of the rotating shaft. A second slot is opened at the inner end of the limiting rotating sleeve, and the two second elastic plates engage with the second slot of the limiting rotating sleeve.

[0016] Furthermore, reed cavities for accommodating reset reeds are respectively provided at positions corresponding to the third hinged portions on both sides of the welding cap.

[0017] Furthermore, the welding cap is fixed with an air inlet pipe mechanism.

[0018] After adopting such a structure, when the welding mask is flipped, the first limiting boss disengages from the first limiting groove, the welding mask rotates to a new angle, and the reset spring pushes the first limiting boss and the first limiting groove to re-engage; similarly, when the splash guard is flipped: the second limiting boss disengages from the second limiting groove, the splash guard rotates to a new angle, and the reset spring pushes the second limiting boss and the second limiting groove to re-engage.

[0019] The beneficial effects of the two-stage mask independent adjustment structure of the welding helmet are:

[0020] (1) Independent angle maintenance, the welding mask angle adjustment does not affect the position of the splash mask, the boss-groove system is physically isolated, and the double masks can stay in any gear between 0°-75°;

[0021] (2) Precise reset guarantee, the double-force design of the reset spring ensures that: the shaft moves inward until the welding mask is locked, and the limit sleeve moves inward to lock the splash shield.

[0022] (3) The user can operate any mask independently with one hand, and it has the function of preventing accidental touch. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a right view of an embodiment of the two-stage mask independent adjustment structure of the welding helmet.

[0024] Figure 2 yes Figure 1 Section view along AA.

[0025] Figure 3 yes Figure 2 Enlarged view of part B.

[0026] Figure 4 It is a three-dimensional diagram of the welding mask in the embodiment of the two-level mask independent adjustment structure of the welding helmet.

[0027] Figure 5 It is a three-dimensional view of the splash shield in the embodiment of the two-stage independent adjustment structure of the welding helmet.

[0028] Figure 6 It is a three-dimensional diagram of the welding cap and the air inlet pipe mechanism in the embodiment of the two-stage mask independent adjustment structure of the welding helmet.

[0029] Figure 7 It is a three-dimensional diagram of the flip assembly in the embodiment of the two-stage mask independent adjustment structure of the welding helmet.

[0030] Figure 8 It is a three-dimensional diagram of the rotating shaft in the embodiment of the two-stage mask independent adjustment structure of the welding helmet.

[0031] Figure 9It is a three-dimensional diagram of the reset spring in the embodiment of the two-stage mask independent adjustment structure of the welding helmet.

[0032] Figure 10 It is a three-dimensional diagram of the limiting rotating sleeve in the embodiment of the two-stage mask independent adjustment structure of the welding helmet.

[0033] Description of the numbers in the figure:

[0034] Welding mask 100; first hinge part 110; first hinge hole 111; first limiting boss 112; automatic darkening lens 120; splash shield 200; second hinge part 210; second hinge hole 211; second limiting boss 212; welding cap 300; third hinge part 310; third hinge hole 311; second limiting groove 312; reed chamber 313; air inlet duct mechanism 400; rotating shaft 510; first retaining groove 511; plug 512; limiting rotating sleeve 520; outer convex ring part 521; first limiting groove 522; second retaining groove 523; through hole 524; reset reed 530; reed body 531; first rebound sheet 532; second rebound sheet 533. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only implementations.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] See also Figures 1 to 10 .

[0039] The welding helmet includes a welding mask 100, a splash shield 200 and a welding cap 300. The welding mask 100 is provided with an automatic darkening lens 120. The splash shield 200 is hinged to the welding cap 300. The welding mask 100 and the splash shield 200 are both hinged to the welding cap 300. The welding mask 100 is located outside the splash shield 200.

[0040] In the two-level mask independent adjustment structure of the welding helmet, a first hinge part 110 is provided on both sides of the welding mask 100, and a first hinge hole 111 is opened in the center of the first hinge part 110. The first hinge part 110 on the inner wall of the welding mask 100 is provided with a plurality of first limiting bosses 112. The plurality of first limiting bosses 112 are evenly distributed in a circular manner along the axis direction of the first hinge hole 111, and the plurality of first limiting bosses 112 are distributed in sequence at equal intervals.

[0041] A second hinge part 210 is provided on both sides of the splash shield 200, and a second hinge hole 211 is opened in the center of the second hinge part 210. The second hinge part 210 on the inner wall of the splash shield 200 is provided with a plurality of second limiting bosses 212. The plurality of second limiting bosses 212 are evenly distributed in a circular manner along the axis direction of the second hinge hole 211, and the plurality of second limiting bosses 212 are distributed in sequence at equal intervals.

[0042] A third hinge portion 310 is also provided on both sides of the welding cap 300, and a third hinge hole 311 is opened in the center of the third hinge portion 310. The third hinge portion 310 on the outer wall of the welding cap 300 is provided with a plurality of second limiting grooves 312. The plurality of second limiting grooves 312 are evenly distributed along the axial direction of the third hinge hole 311. The plurality of second limiting grooves 312 are distributed at equal intervals in sequence.

[0043] Reed chambers 313 for accommodating the reset reed 530 are respectively provided on both sides of the welding cap 300 corresponding to the third hinge portion 310 . The reed chambers 313 are communicated with the third hinge hole 311 . An air inlet duct mechanism 400 is fixedly mounted on the top of the welding cap 300 .

[0044] The welding mask 100, the splash shield 200 and the welding cap 300 are hinged by two sets of flip assemblies. The two sets of flip assemblies, the two first hinge holes 111 of the welding mask 100, the two second hinge holes 211 of the splash shield 200 and the two third hinge holes 311 of the welding cap 300 are in a one-to-one correspondence. The flip assembly includes a rotating shaft 510, a reset spring 530 and a limiting rotating sleeve 520. The limiting rotating sleeve 520 passes through the corresponding second hinge hole 211 of the splash shield 200. The side wall of the limiting rotating sleeve 520 on the outside of the splash shield 200 extends outward with an outer convex ring portion 521, and a plurality of first limiting grooves 522 are provided on the end face of the outer convex ring portion 521 away from the side of the splash shield 200. The grooves 522 are evenly distributed along the axial direction of the limiting sleeve 520, and several first limiting grooves 522 are distributed at equal intervals in sequence. The several first limiting grooves 522 of the limiting sleeve 520 can cooperate with the several first limiting bosses 112 of the welding mask 100, and the several second limiting grooves 312 of the third hinge part 310 can cooperate with the several second limiting bosses 212 of the splash shield 200. A through hole 524 cooperating with the rotating shaft 510 is opened in the center of the limiting sleeve 520, and the rotating shaft 510 passes through the first hinge hole 111 corresponding to the first hinge part 110, the through hole 524 of the limiting sleeve 520 and the third hinge hole 311 of the third hinge part 310 in sequence, and the outer end of the rotating shaft 510 extends outward to plug 512.

[0045] The reset spring 530 includes a spring body 531, two first rebound sheets 532 and two second rebound sheets 533. The spring body 531 rests on the welding cap 300. The inner end of the rotating shaft 510 is provided with a first slot 511. The two first rebound sheets 532 of the reset spring 530 are engaged with the first slot 511 of the rotating shaft 510. The two first rebound sheets 532 act on the rotating shaft 510 to have a tendency to move toward the inside of the welding cap 300. The inner end of the limiting rotating sleeve 520 is provided with a second slot 523. The two second rebound sheets 533 are engaged with the second slot 523 of the limiting rotating sleeve 520. The two second rebound sheets 533 act on the limiting rotating sleeve 520 to have a tendency to move toward the inside of the welding cap 300.

[0046] The welding mask 100 is located at the outermost side of the welding helmet. When the welding mask 100 is flipped, the welding mask 100 rotates along the center line of the first hinge hole 111 of the first hinge portion 110. The first limiting bosses 112 of the welding mask 100 are interlaced with the first limiting grooves 522 of the limiting rotating sleeve 520. After flipping, under the action of the reset spring 530, the first limiting bosses 112 of the welding mask 100 are still tightly fitted with the first limiting grooves 522 of the limiting rotating sleeve 520.

[0047] Similarly, when the splash shield 200 is flipped over, the splash shield 200 rotates along the center line direction of the second hinge hole 211 of the second hinge portion 210 thereof, and the second limiting bosses 212 of the splash shield 200 are interlaced with the second limiting grooves 312 of the welding cap 300. After flipping over, under the action of the reset spring 530, the second limiting bosses 212 of the splash shield 200 and the second limiting grooves 312 of the welding cap 300 are still tightly fitted.

[0048] The flipping action of the welding mask 100 and the flipping action of the splash shield 200 do not affect each other, and the two can present different flipping angles relative to the welding cap 300.

[0049] The above is only one embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the principles of the present invention, and these should also be regarded as falling within the scope of protection of the present invention.

Claims

1. A two-stage mask independent adjustment structure for a welding helmet, the welding helmet comprising a welding mask (100), a splash mask (200) and a welding cap (300), the splash mask (200) and the welding mask (100) and the splash mask (200) being hinged to the welding cap (300), the welding mask (100) being located outside the splash mask (200), and the welding helmet being characterized by: A first hinge portion (110) is provided on both sides of the welding mask (100), a first hinge hole (111) is opened at the center of the first hinge portion (110), and a plurality of first limiting bosses (112) are provided on the first hinge portion (110) on the inner side wall of the welding mask (100), and the plurality of first limiting bosses (112) are evenly distributed along the axial direction of the first hinge hole (111) at circumferential intervals. A second hinge portion (210) is provided on both sides of the splash shield (200), a second hinge hole (211) is opened in the center of the second hinge portion (210), and a plurality of second limiting bosses (212) are provided on the second hinge portion (210) on the inner side wall of the splash shield (200), and the plurality of second limiting bosses (212) are evenly distributed along the axial direction of the second hinge hole (211) at circumferential intervals. A third hinge portion (310) is also provided on both sides of the welding cap (300), a third hinge hole (311) is opened in the center of the third hinge portion (310), and a plurality of second limiting grooves (312) are provided on the outer wall of the welding cap (300), and the plurality of second limiting grooves (312) are evenly distributed along the axial direction of the third hinge hole (311) at circumferential intervals. The welding mask (100), the splash shield (200) and the welding cap (300) are hinged through two groups of flip assemblies. The two groups of flip assemblies, the two first hinge holes (111) of the welding mask (100), the two second hinge holes (211) of the splash shield (200) and the two third hinge holes (311) of the welding cap (300) are in a one-to-one correspondence. The flip assembly includes a rotating shaft (510) and a limiting rotating sleeve (520). The limiting rotating sleeve (520) passes through the corresponding second hinge hole (211) of the splash shield (200). The side wall of the limiting rotating sleeve (520) on the outside of the splash shield (200) extends outward with an outer convex ring portion (521). The end surface of the outer convex ring portion (521) away from the splash shield (200) is provided with a plurality of first limiting recesses. Groove (522), a plurality of first limiting grooves (522) are evenly distributed at circumferential intervals along the axial direction of the limiting rotating sleeve (520), a plurality of first limiting grooves (522) of the limiting rotating sleeve (520) can cooperate with a plurality of first limiting bosses (112) of the welding mask (100), a plurality of second limiting grooves (312) of the third hinge part (310) can cooperate with a plurality of second limiting bosses (212) of the splash shield (200), a through hole (524) is opened in the center of the limiting rotating sleeve (520) to cooperate with the rotating shaft (510), and the rotating shaft (510) passes through the first hinge hole (111) corresponding to the first hinge part (110), the through hole (524) of the limiting rotating sleeve (520) and the third hinge hole (311) of the third hinge part (310) in sequence.

2. The two-stage independent mask adjustment structure of the welding helmet according to claim 1 is characterized by: The invention also includes a reset spring (530), which includes a spring body (531), two first resilient sheets (532) and two second resilient sheets (533). The spring body (531) abuts against the welding cap (300). The two first resilient sheets (532) cooperate with the inner end of the rotating shaft (510). The two first resilient sheets (532) act on the rotating shaft (510) to have a tendency to move toward the inner side of the welding cap (300). The second resilient sheet (533) cooperates with the inner end of the limiting rotating sleeve (520). The two second resilient sheets (533) act on the limiting rotating sleeve (520) to have a tendency to move toward the inner side of the welding cap (300).

3. The two-stage independent mask adjustment structure of the welding helmet according to claim 2 is characterized by: A first clamping groove (511) is formed at the inner end of the rotating shaft (510), and two first resilient sheets (532) of the reset spring (530) are engaged with the first clamping groove (511) of the rotating shaft (510). A second clamping groove (523) is formed at the inner end of the position-limiting rotating sleeve (520), and two second resilient sheets (533) are engaged with the second clamping groove (523) of the position-limiting rotating sleeve (520).

4. The two-stage independent mask adjustment structure of the welding helmet according to claim 2 is characterized by: Reed chambers (313) for accommodating the reset reed (530) are respectively provided at positions corresponding to the third hinged portion (310) on both sides of the welding cap (300).

5. The two-stage independent mask adjustment structure of the welding helmet according to claim 1 is characterized by: The welding cap (300) is fixed with an air inlet pipe mechanism (400).

Images