Signboard frame

Abstract

The utility model relates to the technical field of signboards, in particular to a signboard frame which comprises two first fixed-form section bars, each first fixed-form section bar comprises a first U-shaped frame, a first L-shaped limiting plate is arranged on the side face of the inner wall of each first U-shaped frame, and the left ends of the two first fixed-form section bars are jointly connected with a second fixed-form section bar. The first fixed profile comprises a first U-shaped frame, the second fixed profile comprises a second U-shaped frame, a second L-shaped limiting plate is arranged on the side face of the inner wall of the second U-shaped frame, the right ends of the two first fixed profiles are jointly connected with an open-type profile, the open-type profile comprises an L-shaped top bottom plate, a third L-shaped limiting plate is arranged at the top of the L-shaped top bottom plate, and a U-shaped positioning frame is clamped on the right side of the third L-shaped limiting plate. The signboard frame allows a user to easily take out an old signboard and insert a new signboard only by disassembling the U-shaped positioning frame when replacing the signboard without disassembling the whole frame, so that the time and labor cost required for replacing the signboard are greatly reduced through the improvement.

Description

Technical Field

[0001] This utility model relates to the field of signage technology, specifically to signage frames. Background Technology

[0002] In modern industrial production, various signs, safety warning signs, and safety reminder signs play a crucial role in ensuring operational safety and process standardization. However, the frames used to install these signs on the market are currently diverse and inconsistent. This diversity leads to inconsistencies in the sign installation process, affecting not only visual aesthetics but also making it difficult to meet standardized installation requirements.

[0003] To address this issue, aluminum profile signage frames have gradually emerged in the market. These frames are designed as standard products with straight horizontal and vertical lines, aiming to improve the aesthetics and standardization of signage installation. Aluminum profiles are lightweight, high-strength, and corrosion-resistant, making them an ideal material for signage frames. Furthermore, the standardized design reduces errors during installation and improves work efficiency.

[0004] While this type of aluminum profile frame offers significant advantages in standardization and aesthetics, it still faces some limitations. Current signage frames require the sign to be placed within four frames during installation, then the frames are secured using four corner brackets to achieve a fixed installation. The signage frame is then fixed in place. However, when a sign needs to be replaced, the entire frame must be disassembled from its installation location, disassembled, and then the installation process repeated. This significantly increases the difficulty and time cost of sign replacement, reducing the efficiency of the replacement operation. Therefore, we propose this signage frame. Utility Model Content

[0005] The purpose of this invention is to provide a sign frame to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The sign frame includes two first fixed-form profiles arranged symmetrically front to back. Each first fixed-form profile includes a first U-shaped frame. The inner wall of the first U-shaped frame is provided with a first L-shaped limiting plate. The left ends of the two first fixed-form profiles are connected to a second fixed-form profile. Both the first and second fixed-form profiles are integrally formed structures. The left end of the front first fixed-form profile is connected to the front end of the second fixed-form profile through a first corner bracket connector. The left end of the rear first fixed-form profile is connected to the rear end of the second fixed-form profile through a second corner bracket connector. The second fixed-form profile includes a second U-shaped frame. The inner wall of the second U-shaped frame is provided with a second L-shaped limiting plate, so that the second fixed-form profile is connected to the two first fixed-form profiles and fixed into a U-shaped frame, allowing the sign to be inserted into the second fixed-form profile and the two first fixed-form profiles.

[0008] The right ends of the two first-type profiles are connected to an openable profile. Both ends of the openable profile, the second-type profile, and the first-type profile are beveled at 45 degrees to ensure that the two adjacent profiles can be joined in an L-shape. The right end of the first-type profile in front is connected to the front end of the openable profile through a third corner bracket connector, and the right end of the first-type profile behind is connected to the rear end of the openable profile through a fourth corner bracket connector. The openable profile includes an L-shaped top and bottom plate. The top of the L-shaped top and bottom plate is provided with a third L-shaped limiting plate. The third L-shaped limiting plate, the second L-shaped limiting plate, and the two first L-shaped limiting plates form a frame-shaped support structure for supporting the sign. The right side of the third L-shaped limiting plate is fitted with a U-shaped positioning frame. The design of the detachable U-shaped positioning frame allows for easy replacement of the sign. When replacing the sign, the old sign can be removed from the frame by simply removing the U-shaped positioning frame, and then the new sign can be inserted into the frame from the openable profile end. Finally, the U-shaped positioning frame can be repositioned, thereby improving the efficiency of sign replacement.

[0009] Preferably, a first arc-shaped abutment is provided at the top edge of the inner wall of the first U-shaped frame, which presses the surface edge of the signboard and makes the signboard concave inward relative to the frame, improving the three-dimensional effect. A first stop strip is provided at the bottom edge of the inner wall of the first U-shaped frame. The side of the first stop strip at the front fits with the side of the first corner bracket connector and the third corner bracket connector, and the side of the first stop strip at the rear fits with the side of the second corner bracket connector and the fourth corner bracket connector, improving the stability of the first corner bracket connector, the second corner bracket connector, the third corner bracket connector and the fourth corner bracket connector after installation.

[0010] Preferably, the inner side of the first L-shaped limiting plate and the first U-shaped frame form a first mounting cavity. Two mounting buckles are detachably connected to the first mounting cavity by bolts, for a total of four mounting buckles. The mounting buckles are provided with mounting holes for mounting and fixing the profile frame to various equipment or objects.

[0011] Preferably, the inner side of the second L-shaped limiting plate and the second U-shaped frame form a second mounting cavity. The first corner bracket connector is located in the second mounting cavity and the first mounting cavity of the front first fixed profile. The two ends of the first corner bracket connector are respectively detachably connected to the top of the inner wall of the second L-shaped limiting plate and the front first L-shaped limiting plate by bolts. The positions of the second L-shaped limiting plate and the front first L-shaped limiting plate are fixed by the first corner bracket connector.

[0012] Preferably, the second corner bracket connector is located in the second mounting cavity and the first mounting cavity of the rear first fixed profile, and the two ends of the second corner bracket connector are respectively detachably connected to the top of the inner wall of the second L-shaped limiting plate and the rear first L-shaped limiting plate by bolts, so that the positions of the second L-shaped limiting plate and the rear first L-shaped limiting plate are fixed by the second corner bracket connector.

[0013] Preferably, a third stop strip is provided on the left side of the bottom of the inner wall of the L-shaped top and bottom plate. The side of the third stop strip fits against the side of the third and fourth corner bracket connectors, improving the stability of the third and fourth corner bracket connectors after installation. The inner side of the third L-shaped limiting plate and the L-shaped top and bottom plate form a third mounting cavity. The third corner bracket connector is located in the third mounting cavity and the first mounting cavity of the front first fixed profile. The two ends of the third corner bracket connector are detachably connected to the top of the inner wall of the third L-shaped limiting plate and the front first L-shaped limiting plate by bolts, and the positions of the third L-shaped limiting plate and the front first L-shaped limiting plate are fixed by the third corner bracket connector.

[0014] Preferably, the fourth corner bracket connector is located in the third mounting cavity and the first mounting cavity of the rear first fixed profile, and both ends of the fourth corner bracket connector are detachably connected to the top of the inner wall of the third L-shaped limiting plate and the rear first L-shaped limiting plate by bolts, thereby fixing the position of the third L-shaped limiting plate and the rear first L-shaped limiting plate.

[0015] Preferably, a second arc-shaped abutment is provided at the top edge of the inner wall of the second U-shaped frame, which presses the surface edge of the signboard and makes the signboard concave inward relative to the frame, improving the three-dimensional effect. A second stop strip is provided at the bottom edge of the inner wall of the second U-shaped frame. The side of the second stop strip fits against the side of the first corner bracket connector and the second corner bracket connector, improving the stability of the first corner bracket connector and the second corner bracket connector after installation.

[0016] Preferably, an L-shaped docking groove is provided on the right side of the top of the third L-shaped limiting plate, and a positioning spring is provided on the top of the left side of the inner wall of the L-shaped docking groove.

[0017] Preferably, a third arc-shaped abutment is provided at the top edge of the inner wall of the U-shaped positioning frame, which presses the surface edge of the sign and makes the sign concave inward relative to the frame, improving the three-dimensional effect. A positioning slot is provided at the bottom of the inner wall of the U-shaped positioning frame, and the protrusion at the bottom of the positioning spring is engaged in the positioning slot. The positioning spring presses the bottom part of the U-shaped positioning frame into the L-shaped docking groove, thereby fixing the position of the U-shaped positioning frame. When it is necessary to disassemble the U-shaped positioning frame, the operator only needs to pull the U-shaped positioning frame outward to remove it. This structure facilitates the operator to quickly disassemble and assemble the U-shaped positioning frame.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This sign frame allows users to easily remove the old sign and insert the new one simply by removing the U-shaped positioning frame when replacing the sign, without having to disassemble the entire frame. This improvement greatly reduces the time and labor costs required to replace signs and improves work efficiency.

[0020] 2. The sign frame uses a first-type profile, a second-type profile, and an openable profile, and uses corner bracket connectors at key connections, which strengthens the overall structure of the frame and ensures greater stability during the installation and use of the sign. Furthermore, the first-type profile, the second-type profile, and the openable profile can be disassembled, which facilitates the transportation of the frame.

[0021] 3. The sign frame features curved abutments and baffles on its inner wall, which effectively press the edges of the sign, making them concave relative to the frame, thus enhancing the three-dimensional effect. This design improves the visual appeal of the sign.

[0022] 4. The modular design of the U-shaped positioning frame makes the entire frame more flexible in function. Users can adjust or replace it at any time as needed to meet the signage display requirements of different occasions or needs. This flexibility improves the applicability of the frame and the user experience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall exploded structure of this utility model;

[0026] Figure 4 This is a partial structural schematic diagram of the present invention;

[0027] Figure 5 This is a schematic diagram of the first fixed-form profile structure in this utility model;

[0028] Figure 6 This is a schematic diagram of the second fixed-form profile structure in this utility model;

[0029] Figure 7 This is a schematic diagram of the openable profile structure in this utility model;

[0030] Figure 8 This is a schematic diagram of the assembly structure of the openable profile in this utility model;

[0031] In the diagram: 1. First fixed-form profile; 10. First U-shaped frame; 100. First arc-shaped abutment; 101. First stop bar; 11. First L-shaped limiting plate; 12. First mounting cavity; 2. Second fixed-form profile; 20. Second U-shaped frame; 200. Second arc-shaped abutment; 201. Second stop bar; 21. Second L-shaped limiting plate; 22. Second mounting cavity; 3. Openable profile; 30. L-shaped top and bottom plate; 300. Third stop bar; 31. Third L-shaped limiting plate; 310. L-shaped mating groove; 311. Positioning spring; 32. U-shaped positioning frame; 320. Third arc-shaped abutment; 321. Positioning slot; 33. Third mounting cavity; 4. First corner bracket connector; 5. Second corner bracket connector; 6. Third corner bracket connector; 7. Fourth corner bracket connector; 8. Mounting buckle. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Please see Figures 1-8 This utility model provides a technical solution:

[0035] The sign frame includes two first fixed-form profiles 1 arranged symmetrically front to back. The first fixed-form profile 1 includes a first U-shaped frame 10. The inner wall of the first U-shaped frame 10 is provided with a first L-shaped limiting plate 11. The left ends of the two first fixed-form profiles 1 are connected to a second fixed-form profile 2. The first fixed-form profile 1 and the second fixed-form profile 2 are both integrally formed structures. The left end of the front first fixed-form profile 1 is connected to the front end of the second fixed-form profile 2 through a first corner bracket connector 4. The left end of the rear first fixed-form profile 1 is connected to the rear end of the second fixed-form profile 2 through a second corner bracket connector 5. The second fixed-form profile 2 includes a second U-shaped frame 20. The inner wall of the second U-shaped frame 20 is provided with a second L-shaped limiting plate 21, so that the second fixed-form profile 2 is connected to the two first fixed-form profiles 1 and fixed into a U-shaped frame, so that the sign can be inserted into the second fixed-form profile 2 and the two first fixed-form profiles 1.

[0036] The right ends of the two first-type profiles 1 are connected to an openable profile 3. Both ends of the openable profile 3, the second-type profile 2, and the first-type profile 1 are beveled at 45 degrees to ensure that adjacent profiles can be joined in an L-shape. The right end of the front first-type profile 1 is connected to the front end of the openable profile 3 via a third angle bracket connector 6, and the right end of the rear first-type profile 1 is connected to the rear end of the openable profile 3 via a fourth angle bracket connector 7. The openable profile 3 includes an L-shaped top and bottom plate 30, and the top of the L-shaped top and bottom plate 30 is provided with a third L-shaped limiter. The positioning plate 31, the third L-shaped limiting plate 31, the second L-shaped limiting plate 21, and the two first L-shaped limiting plates 11 form a frame-shaped support structure for supporting the sign. The right side of the third L-shaped limiting plate 31 is fitted with a U-shaped positioning frame 32. The U-shaped positioning frame 32 is designed to be detachable. When replacing the sign, the old sign can be taken out of the frame simply by removing the U-shaped positioning frame 32. Then, the new sign can be inserted into the frame from the open profile 3 end. Finally, the U-shaped positioning frame 32 can be snapped back into place, thereby improving the efficiency of sign replacement.

[0037] In this embodiment, a first arc-shaped abutment 100 is provided at the top edge of the inner wall of the first U-shaped frame 10, which presses the surface edge of the signboard and makes the signboard concave inward relative to the frame, improving the three-dimensional effect. A first stop strip 101 is provided at the bottom edge of the inner wall of the first U-shaped frame 10. The side of the front first stop strip 101 fits against the side of the first corner bracket connector 4 and the third corner bracket connector 6, and the side of the rear first stop strip 101 fits against the side of the second corner bracket connector 5 and the fourth corner bracket connector 7, improving the stability of the first corner bracket connector 4, the second corner bracket connector 5, the third corner bracket connector 6 and the fourth corner bracket connector 7 after installation.

[0038] Specifically, the inner side of the first L-shaped limiting plate 11 and the first U-shaped frame 10 form a first mounting cavity 12. Two mounting buckles 8 are detachably connected to the first mounting cavity 12 by bolts, for a total of four mounting buckles 8. The mounting buckles 8 are provided with mounting holes for mounting and fixing the profile frame to various equipment or objects.

[0039] Furthermore, the inner side of the second L-shaped limiting plate 21 and the second U-shaped frame 20 form a second mounting cavity 22. The first corner bracket connector 4 is located in the second mounting cavity 22 and the first mounting cavity 12 of the front first fixed profile 1. The two ends of the first corner bracket connector 4 are detachably connected to the top of the inner wall of the second L-shaped limiting plate 21 and the front first L-shaped limiting plate 11 by bolts. The positions of the second L-shaped limiting plate 21 and the front first L-shaped limiting plate 11 are fixed by the first corner bracket connector 4.

[0040] Furthermore, the second corner bracket connector 5 is located in the second mounting cavity 22 and the first mounting cavity 12 of the rear first fixed profile 1, and the two ends of the second corner bracket connector 5 are respectively detachably connected to the top of the inner wall of the second L-shaped limiting plate 21 and the rear first L-shaped limiting plate 11 by bolts, thereby fixing the position of the second L-shaped limiting plate 21 and the rear first L-shaped limiting plate 11 by the second corner bracket connector 5.

[0041] Furthermore, a third stop bar 300 is provided on the left side of the bottom of the inner wall of the L-shaped top and bottom plate 30. The side of the third stop bar 300 fits against the side of the third corner bracket connector 6 and the fourth corner bracket connector 7, improving the stability of the third corner bracket connector 6 and the fourth corner bracket connector 7 after installation. The inner side of the third L-shaped limiting plate 31 and the L-shaped top and bottom plate 30 form a third mounting cavity 33. The third corner bracket connector 6 is located in the third mounting cavity 33 and the first mounting cavity 12 of the front first fixed profile 1. The two ends of the third corner bracket connector 6 are detachably connected to the top of the inner wall of the third L-shaped limiting plate 31 and the front first L-shaped limiting plate 11 by bolts, and the positions of the third L-shaped limiting plate 31 and the front first L-shaped limiting plate 11 are fixed by the third corner bracket connector 6.

[0042] Furthermore, the fourth corner bracket connector 7 is located in the third mounting cavity 33 and the first mounting cavity 12 of the rear first fixed profile 1, and both ends of the fourth corner bracket connector 7 are detachably connected to the top of the inner wall of the third L-shaped limiting plate 31 and the rear first L-shaped limiting plate 11 by bolts, thereby fixing the position of the third L-shaped limiting plate 31 and the rear first L-shaped limiting plate 11 by the fourth corner bracket connector 7.

[0043] Furthermore, a second arc-shaped abutment 200 is provided at the top edge of the inner wall of the second U-shaped frame 20, which presses the surface edge of the signboard and makes the signboard concave inward relative to the frame, improving the three-dimensional effect. A second stop strip 201 is provided at the bottom edge of the inner wall of the second U-shaped frame 20. The side of the second stop strip 201 fits against the side of the first corner bracket connector 4 and the second corner bracket connector 5, improving the stability of the first corner bracket connector 4 and the second corner bracket connector 5 after installation.

[0044] Furthermore, an L-shaped docking groove 310 is provided on the right side of the top of the third L-shaped limiting plate 31, and a positioning spring piece 311 is provided on the top left side of the inner wall of the L-shaped docking groove 310.

[0045] Furthermore, a third arc-shaped abutment 320 is provided at the top edge of the inner wall of the U-shaped positioning frame 32, which presses the surface edge of the sign and makes the sign concave inward relative to the frame, improving the three-dimensional effect. A positioning slot 321 is provided at the bottom of the inner wall of the U-shaped positioning frame 32, and the protrusion at the bottom of the positioning spring 311 is engaged in the positioning slot 321. The positioning spring 311 presses the bottom part of the U-shaped positioning frame 32 into the L-shaped docking groove 310, thereby fixing the position of the U-shaped positioning frame 32. When it is necessary to disassemble the U-shaped positioning frame 32, the staff only needs to pull the U-shaped positioning frame 32 outward to remove it. This structure facilitates the quick disassembly and assembly of the U-shaped positioning frame 32 by the staff.

[0046] In this embodiment, when using the sign frame, the second fixed profile 2 is fixed to the left end of the two first fixed profiles 1. It is then connected to the first fixed profiles 1 via the first corner bracket connector 4 and the second corner bracket connector 5 to form a U-shaped frame. An openable profile 3 is connected to the right end of the frame, ensuring that the two ends of the openable profile 3, the second fixed profile 2, and the first fixed profile 1 are joined at a 45-degree angle. The third corner bracket connector 6 and the fourth corner bracket connector 7 are used to fix the openable profile 3, ensuring the overall stability of the frame. Then, the sign to be installed is prepared and placed in the gap between the second fixed profile 2 and the two first fixed profiles 1, so that the first arc-shaped abutment 100 and the second arc-shaped abutment... The sheet 200 and the third arc-shaped abutment 320 press the edge of the sign to ensure its stability and enhance its three-dimensional effect. Next, the U-shaped positioning frame 32 is snapped onto the third L-shaped limiting plate 31 of the open profile 3 to ensure that the position of the U-shaped positioning frame 32 is fixed. The positioning spring 311 will press its bottom part into the L-shaped docking groove 310 to ensure the safety of the sign. Finally, the installation buckle 8 is used to fix the sign frame to various equipment or objects to complete the installation of the entire frame. When it is necessary to replace the sign, simply remove the U-shaped positioning frame 32, take out the old sign, and then insert the new sign into the frame from the end of the open profile 3. Finally, snap the U-shaped positioning frame 32 back into its original position to ensure that it is fixed.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sign frame, comprising two first-shaped profiles (1) arranged symmetrically front to back, characterized in that: The first fixed profile (1) includes a first U-shaped frame (10), and a first L-shaped limiting plate (11) is provided on the side of the inner wall of the first U-shaped frame (10). The left ends of the two first fixed profiles (1) are connected to a second fixed profile (2). The left end of the front first fixed profile (1) is connected to the front end of the second fixed profile (2) through a first corner bracket connector (4), and the left end of the rear first fixed profile (1) is connected to the rear end of the second fixed profile (2) through a second corner bracket connector (5). The second fixed profile (2) includes a second U-shaped frame (20). The inner wall has a second L-shaped limiting plate (21) on its side. The right ends of the two first fixed profiles (1) are connected to an openable profile (3). The right end of the first fixed profile (1) in front is connected to the front end of the openable profile (3) through a third corner bracket connector (6). The right end of the first fixed profile (1) in the rear is connected to the rear end of the openable profile (3) through a fourth corner bracket connector (7). The openable profile (3) includes an L-shaped top and bottom plate (30). The top of the L-shaped top and bottom plate (30) is provided with a third L-shaped limiting plate (31). The right side of the third L-shaped limiting plate (31) is fitted with a U-shaped positioning frame (32).

2. The sign frame according to claim 1, characterized in that: The first arc-shaped abutment (100) is provided at the top edge of the inner wall of the first U-shaped frame (10), and the first stop strip (101) is provided at the bottom edge of the inner wall of the first U-shaped frame (10).

3. The sign frame according to claim 1, characterized in that: The inner side of the first L-shaped limiting plate (11) and the first U-shaped frame (10) form a first mounting cavity (12), and two mounting buckles (8) are detachably connected in the first mounting cavity (12) by bolts.

4. The sign frame according to claim 3, characterized in that: The inner side of the second L-shaped limiting plate (21) and the second U-shaped frame (20) form a second mounting cavity (22). The first corner bracket connector (4) is located in the second mounting cavity (22) and the first mounting cavity (12) of the front first fixed profile (1). The two ends of the first corner bracket connector (4) are respectively detachably connected to the top of the inner wall of the second L-shaped limiting plate (21) and the front first L-shaped limiting plate (11) by bolts.

5. The sign frame according to claim 4, characterized in that: The second corner bracket connector (5) is located in the second mounting cavity (22) and the first mounting cavity (12) of the rear first fixed profile (1), and the two ends of the second corner bracket connector (5) are respectively detachably connected to the top of the inner wall of the second L-shaped limiting plate (21) and the rear first L-shaped limiting plate (11) by bolts.

6. The sign frame according to claim 5, characterized in that: A third stop bar (300) is provided on the left side of the bottom of the inner wall of the L-shaped top and bottom plate (30). The inner side of the third L-shaped limiting plate (31) and the L-shaped top and bottom plate (30) form a third mounting cavity (33). The third corner bracket connector (6) is located in the third mounting cavity (33) and the first mounting cavity (12) of the front first fixed profile (1). The two ends of the third corner bracket connector (6) are respectively detachably connected to the top of the inner wall of the third L-shaped limiting plate (31) and the front first L-shaped limiting plate (11) by bolts.

7. The sign frame according to claim 6, characterized in that: The fourth corner bracket connector (7) is located in the third mounting cavity (33) and the first mounting cavity (12) of the rear first fixed profile (1), and the two ends of the fourth corner bracket connector (7) are respectively detachably connected to the top of the inner wall of the third L-shaped limiting plate (31) and the rear first L-shaped limiting plate (11) by bolts.

8. The sign frame according to claim 1, characterized in that: A second arc-shaped abutment (200) is provided at the top edge of the inner wall of the second U-shaped frame (20), and a second stop strip (201) is provided at the bottom edge of the inner wall of the second U-shaped frame (20).

9. The sign frame according to claim 1, characterized in that: The third L-shaped limiting plate (31) has an L-shaped docking groove (310) on the right side of its top, and a positioning spring (311) is provided on the top left side of the inner wall of the L-shaped docking groove (310).

10. The sign frame according to claim 9, characterized in that: A third arc-shaped abutment (320) is provided at the top edge of the inner wall of the U-shaped positioning frame (32), and a positioning slot (321) is provided at the bottom of the inner wall of the U-shaped positioning frame (32), and the protrusion at the bottom of the positioning spring (311) is engaged in the positioning slot (321).

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