Pressing frame and welding mask

Abstract

The utility model relates to the technical field of welding tools, and discloses a pressing frame and a welding mask, the pressing frame comprises a frame body, and a frame-shaped window is defined by edge strips of the frame body. And the stopping part is formed on the first surface, which is basically parallel to the frame-shaped window, of the frame body. An inserting groove is formed between the stopping part and the frame body, and the protection sheet is detachably inserted into the inserting groove in the direction basically parallel to the frame-shaped window. By the adoption of the pressing frame and the welding mask, the protection piece is convenient to disassemble, and the sealing effect between the protection piece and the mask body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding tools, and more specifically, to a pressing frame and a welding mask. Background Art

[0002] The welding mask is a tool that protects the safety of workers during welding and cutting operations. The welding mask is mainly composed of an observation window, a filter, a protective sheet and a mask. The filter can be set separately or integrated into a lens group to adjust the light and effectively filter harmful light, thereby protecting the welder's eyes and face from arc radiation damage. The protective sheet is used to prevent welding slag, smoke, etc. from entering the mask through the observation window.

[0003] There are two main ways to install the protective sheet: one is to clip it onto the mask outside the observation window, and the other is to press it onto the mask inside the observation window. These two methods usually have the following defects: First, the protective sheet is easily damaged by welding slag and smoke, and the replacement frequency is high. The existing installation structure makes it difficult to remove and install the protective sheet. Second, in the existing installation structure, the seal between the protective sheet and the mask is not tight, which easily leads to the infiltration of smoke and welding slag.

[0004] In view of this, there is an urgent need to provide a mounting structure for a protection sheet so that the protection sheet can be easily replaced and has good sealing performance. Summary of the invention

[0005] In order to at least solve one or more of the technical problems mentioned above, the utility model provides a press frame, comprising: a frame body, wherein side strips of the frame body enclose a frame-shaped window; a stopper portion, wherein the stopper portion is formed on a first surface of the frame body that is basically parallel to the frame-shaped window; an insertion groove is formed between the stopper portion and the frame body, and is configured to allow a protective sheet to be detachably inserted into the insertion groove along a direction that is basically parallel to the frame-shaped window.

[0006] According to an embodiment of the present invention, the plug-in slot is configured to have an interference fit or a clearance of 0.5 to -0.2 mm with the protective sheet plugged into the plug-in slot.

[0007] According to an embodiment of the present invention, the insertion slot is configured such that the protection sheet inserted in the insertion slot protrudes in a direction away from the frame-shaped window.

[0008] According to one embodiment of the utility model, the stop portion includes at least one of a first stop member, a second stop member and a third stop member; the first stop member and the second stop member are respectively arranged on both sides of the plug-in direction of the protective sheet, and are arranged to limit the displacement of the protective sheet in the directions on both sides of the plug-in direction of the protective sheet; the third stop member is arranged in the plug-in direction of the protective sheet, and is arranged to limit the displacement of the protective sheet in the plug-in direction.

[0009] According to an embodiment of the present utility model, an insertion slot is formed between at least one of the first stop member, the second stop member, and the third stop member and the side strip of the frame body.

[0010] According to an embodiment of the present utility model, the first stop member and the second stop member are respectively formed on the first surfaces of the side strips of the frame body located on both sides of the insertion direction of the protective sheet, extending in a direction away from the frame-shaped window; the third stop member is formed on the first surface of the side strip of the frame body located in the insertion direction of the protective sheet, extending in a direction away from the frame-shaped window.

[0011] According to an embodiment of the present utility model, at least one of the first stop member, the second stop member, and the third stop member forms a stop flange at its end away from the frame-shaped window, which is substantially parallel to the frame-shaped window; an insertion slot is formed between the stop flange and the first surface of the side strip of the frame body.

[0012] According to an embodiment of the present utility model, the stop portion at least includes a first stop member and a second stop member; the first stop member and the second stop member are respectively arranged on both sides of the insertion direction of the protective sheet; the distance between the first stop member and the second stop member is set such that when the protective sheet is inserted into the insertion slot, the first stop member and the second stop member clamp the protective sheet to deform the protective sheet.

[0013] According to an embodiment of the present utility model, guiding surfaces for guiding the protective sheet into the insertion slot are provided at the ends of the first stop member and the second stop member facing away from the insertion direction of the protective sheet.

[0014] According to an embodiment of the present utility model, the pressing frame further includes: a receiving portion formed on the second surface of the frame body substantially parallel to the frame-shaped window; a receiving cavity is formed between the receiving portion and the frame body, and is arranged such that the lens group can be detachably arranged in the receiving cavity along a direction substantially parallel to the frame-shaped window.

[0015] According to an embodiment of the present utility model, the receiving cavity is arranged such that the lens group is inserted into the receiving cavity along a direction substantially parallel to the frame-shaped window.

[0016] According to an embodiment of the present utility model, the receiving portion includes at least one of a first limiting member, a second limiting member, and a third limiting member; the first limiting member and the second limiting member are respectively arranged on both sides of the insertion direction of the lens group, and are arranged to limit the displacement of the lens group in the directions on both sides of the insertion direction of the lens group; the third limiting member is arranged in the insertion direction of the lens group, and is arranged to limit the displacement of the lens group in the insertion direction.

[0017] According to an embodiment of the present utility model, the first limiting member and the second limiting member are respectively formed on the second surfaces of the side strips of the frame body located on both sides of the insertion direction of the lens group, extending in a direction away from the frame-shaped window; the third limiting member is formed on the second surface of the side strip of the frame body located in the insertion direction of the lens group, extending in a direction away from the frame-shaped window.

[0018] According to an embodiment of the present utility model, at least one of the first limiting member, the second limiting member and the third limiting member forms a limiting flange at its end away from the frame-shaped window, which is substantially parallel to the frame-shaped window; a receiving cavity is formed between the limiting flange and the second surface of the side strip of the frame body.

[0019] According to an embodiment of the present utility model, at least one of the first limiting member and the second limiting member is provided with an elastic buckle at its end facing away from the insertion direction of the lens group, which is configured to fix the surface of the lens group facing away from the insertion direction of the lens group when the lens group is inserted into the receiving cavity.

[0020] According to an embodiment of the present utility model, the elastic buckle is provided with a transition surface inclined towards both sides of the insertion direction of the lens group, which is configured to guide the lens group into the receiving cavity.

[0021] According to an embodiment of the present utility model, an accessory bracket is provided outside at least one of the first limiting member and the second limiting member; the accessory bracket is used to support an accessory cooperating with the lens group; the accessory bracket includes at least one fixing position.

[0022] According to an embodiment of the present utility model, the receiving cavity is configured to detachably embed the lens group in the receiving cavity in a direction substantially perpendicular to the frame-shaped window.

[0023] According to an embodiment of the present utility model, the pressing frame further includes a connecting portion, which is arranged on the outer periphery of the frame body and in the insertion direction of the protective sheet; the connecting portion is configured to connect the frame body to the installation position.

[0024] According to an embodiment of the present utility model, the connection mode of the connecting portion is pivot connection or plug connection.

[0025] According to an embodiment of the present utility model, a lens group is arranged on the second surface of the frame body, and preferably the frame body and the lens group are integrally formed.

[0026] According to an embodiment of the present utility model, the pressing frame further includes a locking portion, which is arranged on the outer periphery of the frame body and in the removal direction of the protective sheet; the locking portion is configured to lock the frame body to the installation position or release it from the installation position.

[0027] According to an embodiment of the present utility model, the locking portion includes a positioning bolt installed on the pressing frame and a lock catch cooperating with the positioning bolt; the lock catch can be installed inside the mask body and corresponds to the position of the positioning bolt; the lock catch includes a housing, a lock core, and an elastic member. The housing forms a sliding cavity with an operation hole provided at the bottom. The lock core includes a sliding block with an operation rod provided at the bottom. The sliding block is placed inside the sliding cavity, and the operation rod extends downward through the operation hole. It is arranged that when the sliding block slides in the sliding cavity, the moving distance of the operation rod in the operation hole limits the sliding distance of the sliding block in the sliding cavity; both ends of the elastic member are respectively connected to the housing and the lock core, and it is arranged that when the elastic member is at the first length, the sliding block is located at the first position, and when the elastic member is at the second length, the sliding block is located at the second position; the housing is provided with a first avoidance groove, which is arranged to enable the positioning bolt to be freely embedded in the first avoidance groove or released from the first avoidance groove; the lock core is provided with a second avoidance groove, which is arranged that when the sliding block is located at the first position, the second avoidance groove is disengaged from the first avoidance groove, and when the sliding block is located at the second position, the second avoidance groove overlaps with the first avoidance groove, and the wall of the second avoidance groove closes the first avoidance groove.

[0028] According to an embodiment of the present utility model, the frame body is any one of a rectangle, a circle, an ellipse, a square, and a polygon.

[0029] According to an embodiment of the present utility model, the frame body is in a closed shape or an open shape.

[0030] According to an embodiment of the present utility model, a contact surface surrounding the frame-shaped viewing window is formed on the side strip of the pressing frame.

[0031] According to an embodiment of the present utility model, the insertion slot is arched.

[0032] According to another aspect of the present utility model, there is provided a welding mask, which includes a mask body, a protection sheet, and the aforementioned pressing frame; the protection sheet is inserted into the insertion slot of the pressing frame; the pressing frame is arranged at the installation position inside the mask body through a connecting portion.

[0033] According to an embodiment of the present utility model, the mask body is provided with an observation port; the edge of the observation port extends towards the inside of the mask body to form a sealing surface substantially parallel to the observation port; the protection sheet abuts against the sealing surface to cover the observation port.

[0034] According to an embodiment of the present utility model, on the inner wall of the mask body, a contact platform surrounding the observation port and extending towards the inside of the mask body is formed, and a contact surface surrounding the frame-shaped viewing window is formed on the side strip of the pressing frame; the contact platform and the contact surface are arranged such that when the contact surface and the contact platform abut, the protection sheet presses the sealing surface.

[0035] According to an embodiment of the present utility model, the welding mask further includes a lens group, and the lens group is inserted into the accommodation cavity of the pressing frame.

[0036] According to an embodiment of the present utility model, the welding mask further includes a magnifying glass, and the magnifying glass is arranged on the accessory bracket of the pressing frame.

[0037] According to an embodiment of the present utility model, on the inner wall of the mask body, at a position corresponding to the elastic buckle of the pressing frame, a limiting block is arranged. The limiting block is arranged such that when the pressing frame is installed at the installation position, the limiting block abuts against the outer side of the elastic buckle to limit the deformation of the elastic buckle.

[0038] Through the pressing frame provided as above, in the embodiment of the present utility model, by arranging a socket groove for detachably installing a protection piece on the frame body, the protection piece can be conveniently detached, and at the same time, a good fixing effect can be achieved on the protection piece. Through the interference fit between the socket groove and the protection piece, a good fixing effect can be formed on the protection piece. By extruding the protection piece through the socket groove to make the protection piece slightly protrude, when the protection piece abuts against the observation port of the welding mask, slight deformation can be generated to form a good sealing effect. By arranging a plurality of stoppers of the stopper portion, the displacement of the protection piece can be restricted in directions other than the insertion direction of the protection piece, so that the position of the protection piece is stable. By arranging a stopper with a stopper flange, the displacement of the protection piece can be restricted with a simple structure. By arranging guiding surfaces at the ends of the first stopper and the second stopper, the protection piece can be conveniently inserted. By arranging a stopper portion on the first surface of the pressing frame and a receiving portion on the second surface, the pressing frame can fix the protection piece and the lens group at the same time, simplifying the structure of the internal equipment of the welding mask. By arranging accessory brackets on both sides of the pressing frame, the expansion of the internal equipment of the welding mask can be realized. By arranging a connecting portion in the insertion direction of the protection piece of the pressing frame, the operation of inserting the protection piece can be prevented from being interfered by the connecting portion. By arranging the connection mode of the connecting portion as a pivot connection, one end of the pressing frame can be relatively fixed, and when inserting and detaching the protection piece, there is no need to bear the weight of the pressing frame, which is more convenient for operation. By arranging the locking portion and its position, the pressing frame can be fixed, facilitating the insertion and detachment of the protection piece.

[0039] Through the welding mask provided as above, in the embodiment of the present utility model, by arranging a sealing surface at the observation port position in the welding mask to abut against the protection piece, the effect of sealing the observation port can be achieved. By arranging an abutting platform on the frame body to abut against the abutting surface formed inside the mask body, the force on the protection piece is limited to the deformation sealing effect, avoiding excessive force on the protection piece. By arranging a lens group on the pressing frame, the protection piece and the lens group are integrated on the same frame body, simplifying the structure of the equipment. By arranging a magnifying glass on the accessory bracket of the pressing frame, the pressing frame can be used to integrate the protection piece, the lens group and the magnifying glass at the same time, ensuring the matching degree of each equipment inside the welding mask.

[0040] By adopting the pressing frame and the welding mask in the embodiment of the present utility model, the detachment of the protection piece is convenient, and the sealing effect between the protection piece and the mask body is improved. Brief Description of the Drawings

[0041] By referring to the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present utility model will become readily understandable. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0042] Figure 1 A schematic structural diagram of the first surface of the pressing frame is shown;

[0043] Figure 2 A partially enlarged schematic diagram of the first surface of the pressing frame is shown;

[0044] Figure 3 A schematic diagram of the second surface of the pressing frame is shown;

[0045] Figure 4 A partially enlarged schematic diagram of the second surface of the pressing frame is shown;

[0046] Figure 5 A schematic diagram of the pressing frame with an attachment bracket is shown;

[0047] Figure 6 A schematic diagram of the pressing frame including another connecting portion is shown;

[0048] Figure 7 A schematic diagram of a welding mask is shown;

[0049] Figure 8 A schematic diagram of the internal structure of the mask body is shown;

[0050] Figure 9 A partially enlarged schematic diagram of the abutting surface of the pressing frame is shown;

[0051] Figure 10 An enlarged schematic diagram of the elastic buckle of the pressing frame and the limit block of the mask body is shown;

[0052] Figure 11 A schematic structural diagram of the lock is shown. Detailed Embodiments

[0053] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0054] It should be understood that the terms "comprising" and "including" as used in the specification and claims of the present utility model indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0055] It should also be understood that the terms used in the specification of the present utility model are merely for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification and claims of the present utility model, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms. It should be further understood that the term "and / or" as used in the specification and claims of the present utility model refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0056] As used in this specification and the claims, the term "if" may be construed, depending on the context, as "when", "once", "in response to determining", or "in response to detecting". Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be construed, depending on the context, as meaning "once determined", "in response to determining", "once [the described condition or event] is detected", or "in response to detecting [the described condition or event]".

[0057] The specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0058] Figure 1 A schematic structural view of the first surface of the pressing frame is shown.

[0059] As Figure 1 shown, the pressing frame 1 is a mechanism for carrying a protective sheet, a filter sheet or other lenses inside a welding mask or a driving helmet. When applied to a welding mask, the carried protective sheet can be fixed at the viewing port c of the welding mask through the connection with the welding mask. The pressing frame 1 includes: a frame body 11, the side strips of the frame body 11 enclosing a frame-shaped viewing window; a stop portion 12, the stop portion 12 being formed on the first surface of the frame body 11 substantially parallel to the frame-shaped viewing window; an insertion slot a being formed between the stop portion 12 and the frame body 11, and being arranged such that the protective sheet 2 can be detachably inserted into the insertion slot a in a direction substantially parallel to the frame-shaped viewing window.

[0060] The frame body 11 is composed of side strips, and the side strips enclose a frame-shaped viewing window. The frame body 11 can be any one of a rectangle, a circle, an ellipse, a square, and a polygon. The frame body 11 can be in a closed shape or an open shape, as long as it satisfies the function of carrying the protective sheet 2. For example, the frame body 11 is a rectangle or an ellipse with one side open. The shape and size of the frame-shaped viewing window can be determined according to the size of the viewing port of the welding mask. The frame-shaped viewing window can be slightly larger than the viewing port of the mask body 3, so as to enable the protective sheet 2 carried by the frame body 11 to fully cover the viewing port. For example, the frame-shaped viewing window can be any one of a rectangle, a circle, an ellipse, a square, and a polygon.

[0061] The frame-shaped viewing window forms a reference plane, and the user can observe the welding site through the frame-shaped viewing window and the viewing port in a direction substantially perpendicular to the frame-shaped viewing window. The frame body 11 is composed of side strips with a certain thickness, so it has a first surface and a second surface. Both the first surface and the second surface are substantially parallel to the frame-shaped viewing window. The frame body 11 is installed on the welding mask. When the user wears the welding mask, the first surface is relatively far from the user's face, and the second surface is relatively close to the user's face. The frame-shaped viewing window is located between the first surface and the second surface.

[0062] The stop portion 12 is formed on the first surface of the frame body 11 and can be composed of materials such as sheets and columns. An insertion slot a for inserting the protective sheet 2 is formed between the stop portion 12 and the frame body 11. The inner contour of the insertion slot a is substantially parallel to the frame-shaped viewing window, so that when the protective sheet 2 is inserted into the insertion slot a, the protective sheet 2 is substantially parallel to the frame-shaped viewing window.

[0063] In the present utility model, "substantially parallel" means that there can be an appropriate included angle between the two, as long as it does not affect the user's line of sight passing through the frame-shaped viewing window. Preferably, "substantially parallel" includes that the included angle between the two is 0-5°, 0-10°, 0-15°, 0-20°, 0-25°, 0-30°, 0-35°, 0-80°, or 5°-10°, 10°-15°, 15°-20°, 20°-25°, 25°-30°, 30°-35°, etc. "Substantially parallel" also includes that due to the deformation of the protective sheet 2, a part of it is not parallel to the frame-shaped viewing window, but its overall trend is substantially parallel to the frame-shaped viewing window.

[0064] By providing the insertion slot a for detachably installing the protective sheet 2 on the frame body 11, the protective sheet 2 can be conveniently detached, and at the same time, a good fixing effect can be achieved on the protective sheet 2.

[0065] Such as Figure 1As shown, the insertion slot a is set to have a clearance of 0.5 to -0.2 mm or an interference fit with the protection piece 2 inserted into the insertion slot a. The interference fit means that the insertion slot a is slightly smaller than the thickness of the protection piece 2 in the thickness direction of the protection piece 2, so that the protection piece 2 can be clamped more tightly in the thickness direction and a good fixing effect on the protection piece 2 can be formed. The range values in the present utility model include the individual values and value ranges therein. For example, a clearance of 0.5 to -0.2 mm includes a clearance of 0.4 to -0.2 mm, a clearance of 0.3 mm, a clearance of -0.1 mm, etc.

[0066] The insertion slot a is arranged such that the protection piece 2 inserted into the insertion slot a protrudes in a direction away from the frame-shaped window. In the width direction of the protection piece 2, the distance between the two parts of the insertion slot a is slightly smaller than the width of the protection piece 2, and the shape of the insertion slot a bulges in a direction away from the frame-shaped window, so that the protection piece 2 is squeezed and also protrudes in a direction away from the frame-shaped window. As Figure 1 shown, preferably, the insertion slot a is arched. When the pressing frame 1 is installed in the welding mask, the protruding protection piece 2 can produce slight deformation when abutting against the observation port of the welding mask, forming a good sealing effect.

[0067] Figure 2 shows a partially enlarged schematic view of the first surface of the pressing frame.

[0068] As Figure 2 shown, the stop portion 12 includes at least one of a first stop member 121, a second stop member 122, and a third stop member 123; the first stop member 121 and the second stop member 122 are respectively arranged on both sides of the insertion direction of the protection piece 2, and are set to limit the displacement of the protection piece 2 in the two side directions of the insertion direction; the third stop member 123 is arranged in the insertion direction of the protection piece 2, and is set to limit the displacement of the protection piece 2 in the insertion direction. At least one of the first stop member 121, the second stop member 122, and the third stop member 123 forms the insertion slot a with the side strip of the frame body 11. For example Figure 2 in, the insertion direction is the upward direction.

[0069] The first stop member 121, the second stop member 122, and the third stop member 123 can respectively limit the displacement of the protection piece 2 from three different directions. Taking Figure 2 as an example, the first stop member 121 and the second stop member 122 are respectively formed on the first surfaces of the side strips on both sides of the frame body 11, and extend in a direction away from the frame-shaped window; the third stop member 123 is formed on the first surface of the side strip of the frame body 11 located in the insertion direction of the protection piece 2, and extends in a direction away from the frame-shaped window.

[0070] When only the first stop member 121 exists, an insertion slot a is formed between the first stop member 121 and the side strip of the frame body 11. The friction force between the insertion slot a and the protective sheet 2 can be used to fix the protective sheet 2, and the first stop member 121 also limits the displacement of the protective sheet 2 on the side in the insertion direction of the protective sheet 2. The functions of the second stop member 122 and the third stop member 123 are similar to those of the first stop member 121, and will not be elaborated.

[0071] When the first stop member 121, the second stop member 122, and the third stop member 123 exist simultaneously, the insertion slot a can be formed only between the first stop member 121 and the frame body 11, and between the second stop member 122 and the frame body 11.

[0072] At least one of the first stop member 121, the second stop member 122, and the third stop member 123 has a stop flange formed at its end away from the frame-shaped window, which is substantially parallel to the frame-shaped window. An insertion slot a is formed between the stop flange and the first surface of the side strip of the frame body 11.

[0073] The first stop member 121, the second stop member 122, and the third stop member 123 can be connected as a whole or can be separately provided. In the present utility model, the shapes of the first stop member 121, the second stop member 122, and the third stop member 123 are not limited, and they can be flakes, columns, or other shaped protrusions formed on the surface of the side strip of the frame body 11.

[0074] When the stop portion 12 only includes the first stop member 121 and the second stop member 122, the first stop member 121 and the second stop member 122 are respectively arranged on both sides in the insertion direction of the protective sheet 2; the distance between the first stop member 121 and the second stop member 122 is set such that when the protective sheet 2 is inserted into the insertion slot, the first stop member 121 and the second stop member 122 clamp the protective sheet 2 to deform the protective sheet 2.

[0075] The deformed protective sheet 2 can protrude from the plane formed by the insertion slot a. When the protective sheet 2 abuts against the observation port of the welding mask, it can be squeezed by the edge of the observation port to form a secondary deformation, forming a shape closer to a plane. While improving the sealing effect, the planar protective sheet 2 reduces the refraction of light and can form a better visual effect.

[0076] As Figure 2 shown, at the ends of the first stop member 121 and the second stop member 122 facing away from the insertion direction of the protective sheet 2, a guiding surface 1211 for guiding the protective sheet 2 into the insertion slot is provided. The guiding surface 1211 can be set as an inclined surface such as a rounded corner or a chamfer when observed in a direction perpendicular to the protective sheet 2.

[0077] When the protective sheet 2 is inserted into the insertion slot, the guiding surface 1211 forms a tightening path that becomes narrower from wide, which can make the insertion process of the protective sheet 2 more convenient.

[0078] Figure 3 A schematic diagram showing the second surface of the pressing frame is shown.

[0079] As Figure 3 As shown, the pressing frame 1 further includes a receiving portion 13, and the receiving portion 13 is formed on the second surface of the frame body 11 that is substantially parallel to the frame-shaped window; a receiving cavity b is formed between the receiving portion 13 and the frame body 11, and is arranged such that the lens group can be detachably arranged in the receiving cavity b along a direction substantially parallel to the frame-shaped window.

[0080] The receiving portion 13 is a sheet-shaped, columnar or other protrusion extending upward from the edge strip surface of the frame body 11, and a receiving cavity b is formed between the receiving portion 13 and the frame body 11. The receiving cavity b is arranged such that the lens group is embedded in the receiving cavity b along a direction substantially perpendicular to the frame-shaped window. Or the receiving cavity b is arranged such that the lens group is inserted into the receiving cavity b along a direction substantially parallel to the frame-shaped window. In order to facilitate the disassembly of the lens group, the present utility model preferably adopts a structure in which the lens group is inserted into the receiving cavity b.

[0081] Figure 4 A partial enlarged schematic diagram showing the second surface of the pressing frame is shown.

[0082] As Figure 4 As shown, the receiving portion 13 includes at least one of a first limiting member 131, a second limiting member 132, and a third limiting member 133; the first limiting member 131 and the second limiting member 132 are respectively arranged on both sides of the insertion direction of the lens group, and are arranged to limit the displacement of the lens group in the two side directions of the insertion direction; the third limiting member 133 is arranged in the insertion direction of the lens group, and is arranged to limit the displacement of the lens group in the insertion direction. For example, in Figure 4 , the insertion direction of the lens group is the upward direction.

[0083] The first limiting member 131 and the second limiting member 132 are respectively formed on the second surfaces of the edge strips on both sides of the frame body 11, and extend in a direction away from the frame-shaped window; the third limiting member 133 is formed on the second surface of the edge strip of the frame body 11 located in the insertion direction of the lens group 4, and extends in a direction away from the frame-shaped window. At least one of the first limiting member 131, the second limiting member 132, and the third limiting member 133 has a limiting flange formed at its end away from the frame-shaped window that is substantially parallel to the frame-shaped window; a receiving cavity b is formed between the limiting flange and the second surface of the edge strip of the frame body 11.

[0084] The first limiting member 131, the second limiting member 132 and the third limiting member 133 can limit the lens assembly 4 in different directions. When the accommodating cavity b adopts a plug-in structure, there can be only one, two or three of the first limiting member 131, the second limiting member 132 and the third limiting member 133. In the present utility model, a structure in which the three are present at the same time is preferred.

[0085] The first limiting member 131 , the second limiting member 132 and the third limiting member 133 may be integrally formed or exist separately. In order to reduce the weight of the device, they may also be respectively configured as hollow structures.

[0086] exist Figure 4 In the illustrated embodiment, the first stopper 131 and the second stopper 132 clamp the lens assembly from both sides of the insertion direction of the lens assembly. The third stopper 133 limits the displacement of the lens assembly at the end point of the insertion direction.

[0087] exist Figure 4 In the embodiment, at least one of the first limiting member 131 and the second limiting member 132 is provided with an elastic buckle 1321 at the end facing away from the plugging direction of the lens group, and is configured to fix the surface of the lens group facing away from the plugging direction of the lens group when the lens group is plugged into the accommodating cavity b.

[0088] The spacing between the elastic buckles of the first limiting member 131 and the second limiting member 132 is slightly smaller than the width of the lens group, so that when the lens group is inserted into the accommodating cavity b, the elastic buckle 1321 can be squeezed and deformed by the lens group and avoid to both sides. When the lens group is inserted into the accommodating cavity b, the elastic buckle 1321 restores its deformation and limits the lens group.

[0089] The elastic buckle 1321 is provided with transition surfaces inclined on both sides toward the insertion direction of the lens group, which are arranged to guide the lens group into the accommodating cavity b. The transition surfaces are inclined surfaces or inclined surfaces with a certain curvature, spherical surfaces, ellipsoidal surfaces, etc.

[0090] Figure 5 A schematic diagram of a press frame with accessory brackets is shown.

[0091] like Figure 5 As shown, an accessory bracket 14 is provided on the outer side of at least one of the first limiting member 131 and the second limiting member 132 ; the accessory bracket 14 is used to support accessories that match the lens assembly; the accessory bracket 14 includes at least one fixing position.

[0092] The accessory bracket 14 can be selectively arranged according to the configuration of different welding helmets. For example, the accessories that match the lens group include a magnifying glass, an additional filter, etc. When the accessories need to correspond to different positions of the lens group, they can be installed on different fixing positions of the accessory bracket 14.

[0093] like Figure 5As shown, the pressing frame 1 further includes a connecting portion 15. The connecting portion 15 is disposed on the outer periphery of the frame body 11 and is located in the insertion direction of the protective sheet 2. The connecting portion 15 is configured to connect the frame body 11 to the installation position. The connection mode of the connecting portion 15 is pivot connection. The installation position refers to the position where the frame body 11 is installed on a welding mask or a cycling helmet, etc.

[0094] The preferred connection mode between the pressing frame 1 and the inside of the welding mask is rotatable connection. That is, the pressing frame 1 is connected to the position of the viewing port of the welding mask. The connecting portion 15 is provided with a rotating shaft, such that the pressing frame 1 rotates freely around the rotating shaft relative to the viewing port of the welding mask, so that the entrance end of the insertion slot a can be disengaged from the viewing port, facilitating the disassembly and installation of the protective sheet 2. The connection mode of the connecting portion 15 is pivot connection or hinge connection.

[0095] As Figure 5 shown, the pressing frame 1 further includes a locking portion 16. The locking portion 16 is disposed on the outer periphery of the frame body 11 and is located in the disassembly direction of the protective sheet 2. The locking portion 16 is configured to lock the frame body 11 to the installation position or release it from the installation position.

[0096] The position where the locking portion 16 is located may or may not correspond to the connecting portion 15. In the present utility model, it is preferred that the locking portion 16 and the connecting portion 15 are correspondingly arranged and are substantially on the same straight line. When it is necessary to install or disassemble the protective sheet 2, the locking portion 16 is opened, such that the pressing frame 1 can rotate around the connecting portion 15, and the position of the locking portion 16 is away from the viewing port, so that the insertion or disassembly operation of the protective sheet 2 can be performed.

[0097] The locking portion 16 may include a positioning bolt 161 and a lock catch 162. The positioning bolt 161 is installed on the frame body 11, and the lock catch 162 is installed on one side of the viewing port of the welding mask. The positions of the positioning bolt 161 and the lock catch 162 correspond to each other, such that when the pressing frame 1 is in contact with the viewing port, the positioning bolt 161 is embedded into the lock catch 162, thereby fixing the pressing frame 1. Preferably, the entrance of the lock catch 162 is provided as an inclined surface, such that the embedding process of the positioning bolt 161 is guided by the inclined surface.

[0098] According to an embodiment of the present utility model, an abutting surface 111 surrounding the frame-shaped viewing window is formed on the side strip of the pressing frame 1. The abutting surface 111 is used to abut against the welding mask.

[0099] Figure 6 The schematic diagram of a pressing frame including another connecting portion is shown.

[0100] As Figure 6As shown, the connecting portion 15 is a plug-in structure, which is paired with a corresponding plug-in hole inside the welding mask, so that the pressing frame 1 is installed inside the welding mask through the plug-in structure. Preferably, the plug-in structure includes two plug-in columns that are substantially parallel to the frame-shaped viewing window. Two corresponding plug-in holes are provided inside the welding mask. When the plug-in columns are inserted into the plug-in holes, one end of the pressing frame provided with the connecting portion is relatively fixed to the welding mask. The connecting portion cooperates with the locking portion to connect the pressing frame and the welding mask.

[0101] Figure 7 Fig. shows a schematic diagram of a welding mask.

[0102] As Figure 7 shown, a welding mask includes a mask body 3, a protective sheet 2, and the aforementioned pressing frame 1. The protective sheet 2 is inserted into the plug-in groove a of the pressing frame 1; the pressing frame 1 is arranged at the installation position inside the mask body 3 through the connecting portion 15. The mask body 3 is provided with an observation port c; the edge of the observation port c extends toward the inside of the mask body 3 to form a sealing surface 31 that is substantially parallel to the observation port c; the protective sheet 2 abuts against the sealing surface 31 to cover the observation port c.

[0103] The sealing surface 31 is used to abut against the protective sheet 2, so that a sealing effect is formed between the deformed protective sheet 2 under extrusion and the sealing surface 31. The sealing surface 31 can be formed by bending the edge of the observation port c of the mask body 3 from the outer surface into the observation port c, or formed from the position on the inner wall of the mask body 3 surrounding the observation port c.

[0104] The sealing surface 31 being substantially parallel to the observation port c means that the included angle between the surface of the sealing surface 31 and the observation port c is less than 45°, preferably less than 10°.

[0105] Inside the mask body 3, a lock 162 is fixed below the observation window c, and is fixed inside the mask body 3 by means of bolts, buckles, pasting, etc.

[0106] Figure 8 Fig. shows a schematic diagram of the internal structure of the mask body.

[0107] Figure 9 Fig. shows a partially enlarged schematic diagram of the abutting surface of the pressing frame.

[0108] As Figure 8 and Figure 9 shown, on the inner wall of the mask body 3, an abutting platform 32 that surrounds the observation port c and extends toward the inside of the mask body 3 is formed, and an abutting surface 111 that surrounds the frame-shaped viewing window is formed on the side strip of the pressing frame 1; the abutting platform 32 and the abutting surface 111 are arranged such that when the abutting surface 111 and the abutting platform 32 abut, the protective sheet 2 is pressed against the sealing surface 31.

[0109] The abutting platform 32 is arranged outside the sealing surface 31 and surrounds the sealing surface 31.

[0110] When the pressing frame 1 is installed in the mask body 3, the frame-shaped viewing window corresponds to the observation port c, and the protective sheet 2 is arranged in the frame-shaped viewing window and abuts against the sealing surface 31. The protective sheet 2 is slightly deformed under the fixing action of the pressing frame 1 and the extrusion action of the sealing surface 31 to achieve the sealing coverage of the observation port c. The abutting surface 111 formed on the pressing frame 1 abuts against the abutting platform 32 formed on the mask body 3, which is used to ensure that while the protective sheet 2 presses against the sealing surface 31, the deformation degree of the protective sheet 2 is restricted.

[0111] In addition, on the sealing surface 31, a flexible material, such as a rubber pad, can be provided to enhance the sealing effect. Flexible materials can also be provided on the abutting platform and the abutting surface to reduce the rigid impact. Between the abutting platform and the sealing surface, reinforcing ribs can also be provided to reduce the deformation of the sealing surface caused by the extrusion action.

[0112] As Figure 7 shown, the welding mask further includes a lens group 4, and the lens group 4 is inserted into the accommodation cavity b of the pressing frame 1. The welding mask can also include a magnifying glass, and the magnifying glass is arranged on the accessory bracket 14 of the pressing frame 1.

[0113] Figure 10 Shows an enlarged schematic view of the elastic buckle of the pressing frame and the limit block of the mask body.

[0114] As Figure 10 shown, on the inner wall of the mask body, corresponding to the position of the elastic buckle 1321 of the pressing frame, a limit block 33 is provided. The limit block 33 is arranged such that when the pressing frame is installed in the installation position within the mask body, the limit block 33 abuts against the outside of the elastic buckle 1321 to restrict the deformation of the elastic buckle 1321, so that the elastic buckle stably restricts the lens group within the accommodation part.

[0115] Figure 11 Shows a schematic structural view of the lock.

[0116] As Figure 11 shown, the lock 162 is installed inside the mask body 3 through bolts and corresponds to the position of the positioning bolt 161 on the frame body 1. The lock 162 includes a housing 1621, a lock core 1622, and an elastic member 1623. The housing 1621 forms a sliding cavity d, and an operation hole g is provided at the bottom of the sliding cavity d. The lock core 1622 includes a sliding block and an operation rod formed at the bottom of the sliding block. The sliding block is placed inside the sliding cavity d, and the operation rod extends downward through the operation hole g. It is arranged that when the sliding block slides in the sliding cavity d, the moving distance of the operation rod in the operation hole g restricts the sliding distance of the sliding block in the sliding cavity d; both ends of the elastic member 1623 are respectively connected to the housing 1621 and the lock core 1622, and are arranged such that when the elastic member 1623 is at the first length, the sliding block is at the first position, and when the elastic member 1623 is at the second length, the sliding block is at the second position.

[0117] Preferably, the elastic member 1623 is a spring.

[0118] A first avoidance groove e facing the positioning bolt 161 is provided at the position of the corresponding positioning bolt 161 on the housing 1621. The first avoidance groove e corresponds to the position of the positioning bolt 161 and is set to enable the positioning bolt 161 to be freely embedded in the first avoidance groove e or released from the first avoidance groove e. The lock core 1622 is provided with a second avoidance groove f in the sliding direction. The second avoidance groove f is set such that when the sliding block is in the first position, the second avoidance groove f is disengaged from the first avoidance groove e, and when the sliding block is in the second position, the second avoidance groove f overlaps with the first avoidance groove e, and the wall of the second avoidance groove f closes the first avoidance groove e. The outer wall of the second avoidance groove f at the opening of the first avoidance groove e is set as an inclined surface, so that the embedding process of the positioning bolt 161 is guided by the inclined surface.

[0119] With the pressing frame provided as above, in the embodiment of the present invention, by providing a plug-in groove for detachably installing a protective sheet on the frame body, the protective sheet can be conveniently detached, and at the same time, a good fixing effect on the protective sheet can be achieved. Through the interference fit between the plug-in groove and the protective sheet, a good fixing effect on the protective sheet can be formed. By pressing the protective sheet through the plug-in groove to make the protective sheet slightly protrude, slight deformation can be generated when the protective sheet abuts against the observation port c of the welding mask, forming a good sealing effect. By providing a plurality of stoppers of the stopper portion, additional restriction on the displacement of the protective sheet can be achieved in addition to the plugging direction of the protective sheet, making the position of the protective sheet stable. By providing a stopper with a stopper flange, the displacement of the protective sheet can be restricted with a simple structure. By providing a guiding surface at the ends of the first stopper and the second stopper, the protective sheet can be conveniently plugged. By providing a stopper portion on the first surface of the pressing frame and a receiving portion on the second surface, the pressing frame can fix the protective sheet and the lens group at the same time, simplifying the structure of the internal equipment of the welding mask. By providing accessory brackets on both sides of the pressing frame, the expansion of the internal equipment of the welding mask can be realized. By providing a connecting portion in the plugging direction of the protective sheet of the pressing frame, the operation of plugging the protective sheet can be prevented from being interfered by the connecting portion. By setting the connection mode of the connecting portion as a pivot connection, one end of the pressing frame can be relatively fixed, and when plugging and detaching the protective sheet, there is no need to bear the weight of the pressing frame, which is more convenient for operation. By providing a locking portion, the pressing frame can be fixed, facilitating the plugging and detaching of the protective sheet.

[0120] With the welding mask provided as above, the embodiments of the present utility model can achieve the effect of sealing the observation port by arranging the sealing surface at the observation port position in the welding mask to abut against the protective sheet. By arranging the abutting platform on the frame to abut against the abutting surface formed inside the mask body, the force on the protective sheet is limited to the deformation sealing effect, avoiding excessive force on the protective sheet. By arranging the lens group on the pressing frame, the protective sheet and the lens group are integrated on the same frame, simplifying the structure of the device. By arranging a magnifying glass on the accessory bracket of the pressing frame, the pressing frame can be used to integrate the protective sheet, the lens group and the magnifying glass at the same time, ensuring the matching degree of each device in the welding mask.

[0121] Although multiple embodiments of the present utility model have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many changes, variations and alternative ways may occur to those skilled in the art without departing from the spirit and scope of the present utility model. It should be understood that various alternative solutions to the embodiments of the present utility model described herein may be employed in the practice of the present utility model. The appended claims are intended to define the scope of protection of the present utility model and thus cover equivalents or alternative solutions within the scope of these claims.

Claims

1. A pressing frame, characterized in that: include: A frame, wherein side strips of the frame surround a frame-shaped viewing window; A stopper, the stopper being formed on a first surface of the frame body substantially parallel to the frame-shaped window; An inserting groove is formed between the stopper and the frame body, and is configured to allow the protective sheet to be detachably inserted into the inserting groove along a direction substantially parallel to the frame-shaped window.

2. The pressing frame according to claim 1, characterized in that: The insertion slot is configured such that a gap of 0.5 to -0.2 mm is provided between the insertion slot and the protection sheet inserted in the insertion slot.

3. The pressing frame according to claim 1, characterized in that: The inserting slot is configured so that the protection sheet inserted in the inserting slot protrudes in a direction away from the frame-shaped window.

4. The pressing frame according to any one of claims 1 to 3, characterized in that: The stopper comprises at least one of a first stopper, a second stopper and a third stopper; The first stopper and the second stopper are respectively arranged on both sides of the plugging direction of the protection sheet, and are arranged to limit the displacement of the protection sheet in directions on both sides of the plugging direction of the protection sheet; The third stopper is arranged in the plugging direction of the protection sheet, and is configured to limit the displacement of the protection sheet in the plugging direction.

5. The pressing frame according to claim 4, characterized in that: The inserting groove is formed between at least one of the first stopper, the second stopper and the third stopper and the side strip of the frame.

6. The pressing frame according to claim 4, characterized in that: The first stopper and the second stopper are respectively formed on the first surface of the side strips of the frame body located on both sides of the plugging direction of the protection sheet, and extend in a direction away from the frame-shaped window; The third stopper is formed on a first surface of a side strip of the frame body located in the plugging direction of the protection sheet, and extends in a direction away from the frame-shaped window.

7. The pressing frame according to claim 6, characterized in that: At least one of the first stopper, the second stopper and the third stopper has a stopper flange at its end away from the frame-shaped window that is substantially parallel to the frame-shaped window; The inserting groove is formed between the stop flange and the first surface of the edge strip of the frame body.

8. The press frame according to any one of claims 1 to 3, characterized in that: The stopper portion comprises at least a first stopper and a second stopper; The first stopper and the second stopper are respectively arranged on both sides of the plugging direction of the protection sheet; The distance between the first stopper and the second stopper is set such that when the protection sheet is inserted into the insertion slot, the first stopper and the second stopper clamp the protection sheet to deform the protection sheet.

9. The pressing frame according to claim 8, characterized in that: The ends of the first stopper and the second stopper facing away from the plugging direction of the protection sheet are provided with guide surfaces for guiding the protection sheet to enter the plugging slot.

10. The press frame according to any one of claims 1 to 3, characterized in that: Also includes: A receiving portion, the receiving portion being formed on a second surface of the frame body substantially parallel to the frame-shaped window; An accommodating cavity is formed between the accommodating portion and the frame body, and is configured so that the lens assembly can be detachably arranged in the accommodating cavity along a direction substantially parallel to the frame-shaped window.

11. The pressing frame according to claim 10, characterized in that: The accommodating cavity is configured so that the lens assembly is inserted into the accommodating cavity along a direction substantially parallel to the frame-shaped window.

12. The pressing frame according to claim 11, characterized in that: The accommodating portion includes at least one of a first limiting member, a second limiting member, and a third limiting member; The first limiting member and the second limiting member are respectively arranged on both sides of the plugging direction of the lens group, and are arranged to limit the displacement of the lens group in directions on both sides of the plugging direction of the lens group; The third limiting member is arranged in the plugging direction of the lens group, and is arranged to limit the displacement of the lens group in the plugging direction.

13. The pressing frame according to claim 12, characterized in that: The first stopper and the second stopper are respectively formed on the second surface of the side strip of the frame body located on both sides of the insertion direction of the lens assembly, and extend in a direction away from the frame-shaped window; The third stopper is formed on a second surface of a side strip of the frame body located in the insertion direction of the lens assembly, and extends in a direction away from the frame-shaped window.

14. The pressing frame according to claim 13, characterized in that: At least one of the first limiting member, the second limiting member and the third limiting member has a limiting flange at its end away from the frame-shaped window that is substantially parallel to the frame-shaped window; The accommodating cavity is formed between the limiting flange and the second surface of the side strip of the frame body.

15. The pressing frame according to claim 12, characterized in that: An elastic buckle is provided at the end of at least one of the first limiting member and the second limiting member facing away from the insertion direction of the lens group, and is configured to fix the surface of the lens group facing away from the insertion direction of the lens group when the lens group is inserted into the accommodating cavity.

16. The pressing frame according to claim 15, characterized in that: The elastic buckle is provided with transition surfaces inclined on both sides toward the plugging direction of the lens group, and is configured to guide the lens group into the accommodating cavity.

17. The pressing frame according to claim 12, characterized in that: An accessory bracket is arranged on the outer side of at least one of the first limiting member and the second limiting member; The accessory bracket is used to support accessories that match the lens assembly; The accessory bracket includes at least one fixing position.

18. The pressing frame according to claim 10, characterized in that: The accommodating cavity is configured so that the lens assembly can be detachably embedded in the accommodating cavity along a direction substantially perpendicular to the frame-shaped window.

19. The press frame according to any one of claims 1 to 3, characterized in that: The pressing frame further includes a connecting portion, The connecting portion is arranged on the outer periphery of the frame body and is located in the plugging direction of the protective sheet; The connecting portion is configured to connect the frame to a mounting position.

20. The pressing frame according to claim 19, characterized in that: The connection mode of the connection part is pivot connection or plug connection.

21. The press frame according to any one of claims 1 to 3, characterized in that: Also includes: A mirror group is arranged on the second surface of the frame.

22. The pressing frame according to claim 21, characterized in that: The frame body and the lens assembly are integrally formed.

23. The press frame according to any one of claims 1 to 3, characterized in that: The pressing frame further includes a locking portion, The locking portion is arranged on the outer periphery of the frame body and is located in the disassembly direction of the protection sheet; The locking portion is configured to lock the frame body to a mounting position or release it from the mounting position.

24. The pressing frame according to claim 23, characterized in that: The locking portion includes a positioning bolt installed on the pressure frame and a lock buckle matched with the positioning bolt; The lock buckle can be installed inside the mask body, corresponding to the position of the positioning bolt; The lock buckle comprises a housing, a lock core, and an elastic component, wherein the housing is formed with a sliding cavity with an operating hole at the bottom, and the lock core comprises a sliding block with an operating rod at the bottom; The sliding block is built into the sliding cavity, and the operating rod extends downward through the operating hole, and is configured such that when the sliding block slides in the sliding cavity, the moving distance of the operating rod in the operating hole limits the sliding distance of the sliding block in the sliding cavity; The two ends of the elastic component are respectively connected to the housing and the lock core, and are configured so that when the elastic component is at a first length, the sliding block is located at a first position, and when the elastic component is at a second length, the sliding block is located at a second position; The housing is provided with a first avoidance groove, which is configured to allow the positioning bolt to be freely embedded in the first avoidance groove or released from the first avoidance groove; The lock core is provided with a second avoidance groove, which is configured so that when the sliding block is located at the first position, the second avoidance groove is disengaged from the first avoidance groove, and when the sliding block is located at the second position, the second avoidance groove overlaps with the first avoidance groove, and the wall of the second avoidance groove closes the first avoidance groove.

25. The press frame according to any one of claims 1 to 3, characterized in that: The frame is any one of rectangular, circular, elliptical, square and polygonal.

26. The press frame according to any one of claims 1 to 3, characterized in that: The frame is in a closed shape or an open shape.

27. The press frame according to any one of claims 1 to 3, characterized in that: An abutment surface surrounding the frame-shaped window is formed on the side strip of the pressing frame.

28. The press frame according to any one of claims 1 to 3, characterized in that: The plug-in slot is arched.

29. A welding helmet, characterized in that: It comprises a mask body, a protective sheet, and a pressing frame as claimed in any one of claims 1 to 28; The protection sheet is inserted into the insertion slot of the pressing frame; The pressing frame is arranged at an installation position inside the mask body through a connecting portion.

30. The welding helmet according to claim 29, characterized in that The mask body is provided with an observation port; The edge of the viewing port extends toward the interior of the mask body to form a sealing surface substantially parallel to the viewing port; The protection sheet abuts against the sealing surface and covers the observation port.

31. The welding helmet according to claim 30, characterized in that An abutment platform is formed on the inner wall of the mask body, surrounding the observation port and extending toward the inside of the mask body. An abutment surface surrounding the frame-shaped window is formed on the side strip of the pressing frame; The abutting platform and the abutting surface are configured such that when the abutting surface abuts against the abutting platform, the protection sheet is pressed against the sealing surface.

32. The welding helmet according to claim 29, characterized in that The welding mask also includes a lens group, and the lens group is inserted into the accommodating cavity of the pressing frame.

33. The welding helmet according to claim 29, characterized in that The welding mask also includes a magnifying glass, which is arranged on an accessory bracket of the pressing frame.

34. The welding helmet according to claim 29, characterized in that A limit block is provided on the inner wall of the mask body corresponding to the position of the elastic buckle of the pressing frame. The limit block is configured such that when the pressure frame is installed at the installation position, the limit block abuts against the outer side of the elastic buckle to limit the deformation of the elastic buckle.

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