Fixing system for welding hood optical filter

Abstract

The utility model relates to the technical field of welding head covers, in particular to a fixing system for welding a head cover optical filter, which comprises a head cover shell, an optical filter assembly and a fixing assembly, and is characterized in that the optical filter assembly is pressed in a window of the head cover shell through locking of a frame main body and the head cover shell; one side of the frame body and one side of the hood shell are connected through a clamping mechanism, the opposite side of the frame body and one side of the hood shell are connected through a lock catch mechanism, a rotating wheel on the lock catch mechanism is provided with two arc grooves, the rotating wheel is rotated, a plug pin with one end arranged in the arc grooves of the rotating wheel does extension or shortening motion, and therefore the plug pin is inserted into or away from a groove of the hood shell. The fixing assembly and the head cover shell can be locked or unlocked only by rotating the fixing assembly, so that a protection sheet in the optical filter assembly can be conveniently mounted or replaced without a tool, the use is convenient and fast, and the replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding hoods, in particular to a fixing system for welding hood filters. Background Art

[0002] In order to prevent spatter and various harmful rays during welding from causing damage to the human body, a welding hood needs to be worn during welding operations.

[0003] An ordinary welding hood is basically composed of a hood shell, a headband, a protective sheet and a filter. The protective sheet and the filter are usually fixed to the hood shell with the help of screws, rivets, etc. However, because the protective sheet is a fragile and replaceable part, it needs to be replaced frequently and requires the use of tools, making replacement complicated and time-consuming.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] The utility model provides a fixing system for a welding hood filter, thereby effectively solving the problems in the background technology.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a fixing system for welding hood filters, comprising: a hood shell, a filter assembly and a fixing assembly for setting the filter assembly on the hood shell;

[0007] The head cover shell is provided with a viewing window for placing the filter assembly in the head cover shell;

[0008] The fixing assembly includes a frame body arranged on the filter assembly, a locking mechanism and a snap-fit ​​mechanism arranged on at least one side of the frame body and the head cover shell, or a locking mechanism arranged on at least two sides of the frame body and the head cover shell;

[0009] The head cover shell is provided with grooves on both sides close to the locking mechanism, and the locking mechanism includes a rotating wheel and a latch, and the rotating wheel is provided with two arc grooves, and the distance from the arc groove to the center of the rotating wheel is gradually set, one end of the latch is set in the arc groove and slides along the arc groove, and the other end is inserted into the groove, and the rotating wheel is rotated to drive the latches on both sides to extend or shorten, thereby inserting the latch into or away from the groove.

[0010] Furthermore, a locking mechanism is provided on one side of the frame body and the head cover shell, and a snap-fit ​​mechanism is provided on the opposite side.

[0011] Furthermore, locking mechanisms are provided on both sides of the frame body and the head cover shell.

[0012] Furthermore, a column structure is provided at one end of the latch, and the column structure is arranged in the circular arc groove.

[0013] Furthermore, the frame body is also provided with a box body structure, a side of the box body structure close to the head cover shell is provided with an opening, and the locking mechanism is arranged in the box body structure.

[0014] Furthermore, a through slot is provided on one side of the box structure away from the opening, and a shift block is provided on the outer circumferential surface of the rotating wheel, and the shift block passes through the through slot and extends to the outside of the box structure.

[0015] Furthermore, the locking mechanism further comprises a fixing seat, and the fixing seat comprises guide rail sections on both sides and a fixing section in the middle for placing the rotating wheel;

[0016] The fixed section is provided with an arc-shaped pit, the rotating wheel is partially arranged in the arc-shaped pit, a rotating shaft is arranged inside the rotating wheel, and two ends of the rotating shaft are arranged in the circular holes on both sides of the fixed section;

[0017] The guide rail section is provided with a locking piece for fixing the fixing seat in the box structure.

[0018] Furthermore, a rib is provided inside the arc-shaped pit, both ends of the rib are connected to the guide rail sections on both sides, a protrusion is provided in the middle of the rib, and a protruding limiting section is provided on the outer circular surface of the rotating wheel. When in the locked and unlocked states, the side surfaces of the limiting section are respectively fitted with the side surfaces of the protrusion.

[0019] Furthermore, a stop bar is provided on one side of the interior of the box structure, and an L-shaped stop block is provided on the guide rail section, and the stop bar and the L-shaped stop block guide and position the circumferential direction of the latch.

[0020] Furthermore, the engaging mechanism is a buckle arranged on the side of the frame body and a slot arranged on the side of the window, and the buckle is inserted into the slot.

[0021] The beneficial effects of the utility model are as follows: the utility model provides a head cover shell, a filter assembly and a fixing assembly, and the filter assembly is pressed into the window of the head cover shell by locking the frame body and the head cover shell; the frame body and the head cover shell are connected on one side by a snap mechanism, and on the opposite side by a locking mechanism; since the rotating wheel on the locking mechanism is provided with two arc grooves, by rotating the rotating wheel, a pin at one end of which is provided in the arc groove of the rotating wheel is extended or shortened, thereby inserting the pin into or away from the groove of the head cover shell; the fixing assembly and the head cover shell can be locked or released by only turning the rotating wheel, thereby facilitating the installation or replacement of the protective sheet inside the filter assembly, without the aid of tools, and being convenient and quick to use, thereby improving the replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the hood shell;

[0024] Figure 2 This is a schematic diagram of the structure of the welding hood in Example 1;

[0025] Figure 3 For Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 The schematic diagram of the structure of the locking mechanism on the hood shell (without the frame body);

[0027] Figure 5 It is a schematic diagram of the structure of the filter assembly and the fixing assembly;

[0028] Figure 6 It is a structural diagram of the main body of the framework;

[0029] Figure 7 It is a structural schematic diagram of the locking mechanism;

[0030] Figure 8 is a schematic diagram of the structure of the rotating wheel;

[0031] Fig. 9 It is a structural schematic diagram of a fixed seat;

[0032] Fig.10 It is a schematic diagram of the structure of the locking mechanism on the hood shell (locked state);

[0033] Fig.11 For Fig.10 A partial enlarged view of point B in the middle;

[0034] Fig.12 This is a schematic diagram of the structure of the welding hood in Example 2.

[0035] Figure numerals: 1, head cover shell; 11, window; 12, groove; 2, filter assembly; 21, protective sheet; 22, filter; 3, fixing assembly; 31, frame body; 311, box structure; 311a, opening; 311b, through groove; 32, locking mechanism; 321, rotating wheel; 321a, arc groove; 321b, dial block; 321c, rotating shaft; 321d, limiting section; 322, latch; 322a, column structure; 323, fixing seat; 323a, guide rail section; 323b, fixing section; 323c, arc-shaped pit; 323d, rib; 323e, protrusion; 323f, L-shaped block; 33, locking mechanism; 331, buckle; 332, slot; 4, locking piece. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0037] In the description of the present invention, it should be noted that the directions or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Embodiment 1:

[0040] like Figures 1 to 11As shown: A fixing system for welding a head mask filter, comprising: a head mask shell 1, a filter assembly 2 and a fixing assembly 3 for setting the filter assembly 2 on the head mask shell;

[0041] A window 11 is provided on the head cover shell 1, which is used to place the filter assembly 2 in the head cover shell 1;

[0042] The fixing assembly 3 includes a frame body 31 disposed on the filter assembly 2, a locking mechanism 32 disposed on at least one side of the frame body 31 and the head cover shell 1, and a snap-fit ​​mechanism 33 disposed on one side, or a locking mechanism 32 disposed on at least both sides of the frame body 31 and the head cover shell 1;

[0043] Grooves 12 are provided on both sides of the head cover shell 1 near the locking mechanism 32. The locking mechanism 32 includes a rotating wheel 321 and a latch 322. The rotating wheel 321 is provided with two arc grooves 321a. The distance from the arc groove 321a to the center of the rotating wheel 321 is gradually set. One end of the latch 322 is set in the arc groove 321a and slides along the arc groove 321a, and the other end is inserted into the groove 12. Rotating the rotating wheel 321 drives the latches 322 on both sides to extend or shorten, so that the latch 322 is inserted into or away from the groove 12, thereby locking or unlocking the connection between the frame body 31 and the head cover shell 1.

[0044] By providing a head cover shell 1, a filter assembly 2 and a fixing assembly 3, the filter assembly 2 is pressed into the window 11 of the head cover shell 1 by locking the frame body 31 and the head cover shell 1. The frame body 31 and the head cover shell 1 are connected on one side by a snap mechanism 33, and on the opposite side by a locking mechanism 32. Since the rotating wheel 321 on the locking mechanism 32 is provided with two arc grooves 321a, by rotating the rotating wheel 321, a pin 322 with one end arranged in the arc groove 321a of the rotating wheel 321 is extended or shortened, so that the pin 322 is inserted into or away from the groove 12 of the head cover shell 1. It is only necessary to turn the rotating wheel 321 to achieve locking or releasing of the fixing assembly 3 and the head cover shell 1, thereby facilitating the installation or replacement of the protective sheet 21 inside the filter assembly 2, without the aid of tools, and is convenient and quick to use, thereby improving the replacement efficiency.

[0045] As a preferred embodiment of the above, a locking mechanism 32 is provided on one side of the frame body 31 and the head cover shell 1, and a snap-fit ​​mechanism 33 is provided on the opposite side; Figure 2As shown, in the present embodiment, two engaging mechanisms 33 are adopted on the upper side and one locking mechanism 32 is adopted on the lower side. When the protective sheet 21 needs to be replaced, the rotating wheel 321 is rotated, the latch 322 is retracted inward, and the latch 322 is disengaged from the groove 12 on the head cover shell 1, so that the locking mechanism 32 is in an unlocked state. After the frame body 31 is rotated a certain distance along the engaging mechanism 33, the engaging mechanism 33 can be unlocked by plugging and unplugging. After the engaging mechanisms 33 and the locking mechanism 32 on both sides are unlocked, the frame body 31 is taken out and the internal protective sheet 21 is replaced. The operation is simple and convenient. The engaging mechanism 33 and the locking mechanism 32 are used in combination to reduce the complexity of the system.

[0046] As a preferred embodiment of the above embodiment, a column structure 322a is provided at one end of the latch 322, and the column structure is arranged in the arc groove 321a. Specifically, since the center of the rotating wheel 321 of the arc groove 321a is not concentrically arranged, and the distance from the arc groove 321a to the center of the rotating wheel 321 is gradually arranged, when the rotating wheel 321 rotates to drive the arc groove 321a to rotate, the column structure 322a moves horizontally under the drive of the arc groove 321a, so that the latch 322 approaches or moves away from the groove 12 on the head cover shell 1, completing the locking or unlocking action.

[0047] In this embodiment, the frame body 31 is also provided with a box body structure 311, and an opening 311a is provided on one side of the box body structure 311 close to the head cover shell 1. The locking mechanism 32 is arranged in the box body structure 311, so that it is convenient to install the locking mechanism 32 into the box body structure 311, and the assembly is convenient; the box body structure 311 surrounds the locking mechanism 32, and the internal locking mechanism 32 is not visible from the outside, the appearance is more neat and simple, and the beauty of the product is enhanced.

[0048] A through slot 311b is provided on one side of the box structure 311 away from the opening 311a, and a shifting block 321b is provided on the outer circumferential surface of the rotating wheel 321. The shifting block 321b extends through the through slot 311b to the outside of the box structure 311. In this embodiment, Figure 3 As shown, when the dial block 321b is on the right side of the through slot 311b, the locking mechanism 32 is in a locked state, and when the dial block 321b is slid to the left side of the through slot 311b, the locking mechanism 32 is in an unlocked state. The locking and unlocking of the locking mechanism 32 can be achieved by simply moving the dial block 321b, without the aid of tools, simplifying the operation process and improving efficiency. The filter 22 can be easily replaced or adjusted when needed, thereby improving the convenience of operation.

[0049] As a preferred embodiment of the above, the locking mechanism 32 further includes a fixing seat 323, and the fixing seat 323 includes guide rail sections 323a on both sides and a fixing section 323b in the middle for placing the rotating wheel 321;

[0050] The fixed section 323b is provided with an arc-shaped pit 323c, and the rotating wheel 321 is partially arranged in the arc-shaped pit 323c. A rotating shaft 321c is provided inside the rotating wheel 321, and both ends of the rotating shaft 321c are arranged in the circular holes on both sides of the fixed section 323b; specifically, the rotating shaft 321c and the rotating wheel 321 can be integrally formed, or the rotating shaft 321c and the rotating wheel 321 are assembled after separate processing, which are all within the protection scope of the present invention; the rotational movement of the rotating wheel 321 along the rotating shaft 321c is converted into the horizontal movement of the pin 322, thereby realizing the locking or unlocking of the pin 322.

[0051] The guide rail section 323a is provided with a locking piece 4 for fixing the fixing seat 323 in the box body structure 311. Specifically, the locking piece 4 can be a screw, a pin, etc., and the locking mechanism 32 is fixed in the box body structure 311 through the fixing seat 323 so that the two form a whole. After taking out the frame body 31, the locking mechanism 32 is taken out along with the frame body 31, and parts will not be scattered, which reduces the complexity of maintenance and operation and reduces possible assembly errors.

[0052] In this embodiment, a rib 323d is provided inside the arc-shaped pit 323c, and the two ends of the rib 323d are connected to the guide rail segments 323a on both sides. A protrusion 323e is provided in the middle of the rib 323d. The outer circumferential surface of the rotating wheel 321 is provided with a protruding limiting segment 321d. When in the locked and unlocked states, the side surfaces of the limiting segment 321d are respectively fitted with the side surfaces of the protrusion 323e. Specifically, the two side surfaces of the protrusion 323e and the limiting segment 321d are mutually matched inclined surfaces. Fig.11 When the lever 321b is in the unlocked state, the side surface of the limit section 321d is in close contact with the inclined surface of one side of the protrusion 323e. Due to the existence of the protrusion 323e, the rotating wheel 321 will not move backward, preventing the position of the latch 322 from retracting, thereby ensuring the extended length of the latch 322 after being locked.

[0053] As a preferred embodiment of the above embodiment, a stop bar is provided on one side of the interior of the box body structure 311, and an L-shaped stop block 323f is provided on the guide rail section 323a. The stop bar and the L-shaped stop block 323f guide and position the pin 322 in the circumferential direction, which helps to prevent unnecessary displacement of the pin 322 during movement, ensures that the pin 322 moves smoothly along the guide rail section 323a, and improves the stability of the system.

[0054] Among them, the locking mechanism 33 is a buckle 331 arranged on the side of the frame body 31 and a slot 332 arranged on the side of the window 11. The buckle 331 is inserted into the slot 332 to complete the locking between the head cover shell 1 on one side and the frame body 31. The locking mechanism 33 is set on one side and the locking mechanism 32 is set on the other side, which reduces the complexity of the system. The locking mechanism 33 is simple and low in cost. The locking mechanism 33 and the locking mechanism 32 are used in combination to reduce costs.

[0055] Embodiment 2:

[0056] like Fig.12 As shown, what is different from Example 1 is that locking mechanisms 32 are provided on both sides of the frame main body 31 and the head cover shell 1. Specifically, locking mechanisms 32 are provided on the upper and lower sides. When in use, just rotate the rotating wheels 321 on both sides respectively to make the locking mechanisms 32 on the upper and lower sides release the lock between the frame main body 31 and the head cover shell 1, and directly take out the frame main body 31 and replace the internal protective sheet 21. The operation is simple and convenient, and the unlocking principle is similar to the locking mechanism 32 of the above-mentioned Example 1, which will not be repeated here.

[0057] In the above two embodiments, four-point positioning is adopted between the frame body 31 and the hood shell 1. Because there is still a gap between the fixing component 3 and the window 11 after assembly, the welded hood may be squeezed and twisted during a destructive test before leaving the factory or during use. With four-point positioning, no matter in which direction it is twisted, the amplitude of deformation will be reduced. Four-point positioning can effectively disperse the pressure, reduce the risk of damage to the hood structure, and extend the service life of the hood.

[0058] Of course, by increasing the number of locking mechanisms 32 and snap-fit ​​mechanisms 33, not only four-point positioning can be achieved, but also more-point positioning can be achieved. However, considering the cost and effect, the four-point positioning structure consisting of two points on the upper and lower sides is stable, low-cost, and suitable for production.

[0059] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fixing system for welding hood filters, It is characterized in that include: A head cover shell, a filter assembly and a fixing assembly for setting the filter assembly on the head cover shell; The head cover shell is provided with a viewing window for placing the filter assembly in the head cover shell; The fixing assembly includes a frame body arranged on the filter assembly, a locking mechanism and a snap-fit ​​mechanism arranged on at least one side of the frame body and the head cover shell, or a locking mechanism arranged on at least two sides of the frame body and the head cover shell; The head cover shell is provided with grooves on both sides close to the locking mechanism, and the locking mechanism includes a rotating wheel and a latch, and the rotating wheel is provided with two arc grooves, and the distance from the arc groove to the center of the rotating wheel is gradually set, one end of the latch is set in the arc groove and slides along the arc groove, and the other end is inserted into the groove, and the rotating wheel is rotated to drive the latches on both sides to extend or shorten, thereby inserting the latch into or away from the groove.

2. The fixing system for welding hood filter according to claim 1, It is characterized in that The frame body and the head cover shell are provided with a locking mechanism on one side and a snap-fit ​​mechanism on the opposite side.

3. The fixing system for welding hood filter according to claim 1, It is characterized in that Locking mechanisms are provided on both sides of the frame body and the head cover shell.

4. The fixing system for welding hood filter according to claim 1, It is characterized in that A column structure is provided at one end of the latch, and the column structure is arranged in the arc groove.

5. The fixing system for welding hood filter according to claim 1, It is characterized in that The frame body is also provided with a box structure, a side of the box structure close to the head cover shell is provided with an opening, and the locking mechanism is arranged in the box structure.

6. The fixing system for welding hood filter according to claim 5, It is characterized in that A through slot is provided on one side of the box structure away from the opening, and a shift block is provided on the outer circumferential surface of the rotating wheel. The shift block passes through the through slot and extends to the outside of the box structure.

7. The fixing system for welding hood filter according to claim 5, It is characterized in that The locking mechanism also includes a fixing seat, which includes guide rail sections on both sides and a fixing section in the middle for placing the rotating wheel; The fixed section is provided with an arc-shaped pit, the rotating wheel is partially arranged in the arc-shaped pit, a rotating shaft is arranged inside the rotating wheel, and two ends of the rotating shaft are arranged in the circular holes on both sides of the fixed section; The guide rail section is provided with a locking piece for fixing the fixing seat in the box structure.

8. The fixing system for welding hood filter according to claim 7, It is characterized in that A rib is provided inside the arc-shaped pit, and the two ends of the rib are connected to the guide rail sections on both sides. A protrusion is provided in the middle of the rib, and a protruding limiting section is provided on the outer circumferential surface of the rotating wheel. When in the locked and unlocked states, the side surfaces of the limiting section are respectively in contact with the side surfaces of the protrusion.

9. The fixing system for welding hood filter according to claim 7, It is characterized in that A stop bar is provided at one side of the box body structure, and an L-shaped stop block is provided at the guide rail section. The stop bar and the L-shaped stop block guide and position the circumference of the latch.

10. The fixing system for welding hood filter according to claim 1, It is characterized in that The engaging mechanism is a buckle arranged on the side of the frame body and a slot arranged on the side of the window, and the buckle is inserted into the slot.

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