Sealing strip for arc surface light box
By designing an L-shaped sealing strip and a raised strip structure for the sealing strip of the curved light box, the problem of traditional sealing strips being difficult to fit the curved light box was solved, achieving efficient sealing and aesthetic effects, and reducing material and labor costs.
Patent Information
- Application Number
- CN202521414293.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-07
AI Technical Summary
Traditional straight sealing strips are difficult to fit effectively into curved light boxes, resulting in gaps and light leakage. Existing solutions are costly in terms of materials and labor, and are complicated to operate.
A sealing strip for curved light boxes has been designed, comprising a sealing strip body and a polycarbonate sheet fixing strip. It adopts an L-shaped sealing strip and a raised strip structure, and is fixed with self-tapping screws to enhance the sealing effect and reduce material and labor costs.
This achieves a tight fit between the sealing strip and the edge of the light box, reducing material and labor costs while improving sealing performance and aesthetics.
Smart Images

Figure CN224682779U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of advertising light box technology, specifically referring to a sealing strip for curved light boxes. Background Technology
[0002] Curved light boxes, with their unique curved shape and excellent visual display effect, are widely used in commercial advertising, traffic signs, and other fields. However, their non-planar structural characteristics make it difficult for traditional straight sealing strips to achieve effective adhesion, especially in the corner areas of the light box, where gaps are easily formed, affecting the overall sealing performance. In existing technologies, some curved light boxes use segmented sealing strip splicing, but misalignment or detachment is prone to occur at the splicing points; some products fill the gaps with sealant, but the operation is complicated and subsequent maintenance is difficult. Traditional sealing strips for curved light boxes require the use of polycarbonate sheets to prevent collapse, and there are no support positions to fix the polycarbonate sheets. In actual operation, other materials need to be added as baffles to fix the polycarbonate sheets, thus increasing material and labor costs, and the effect is not ideal. Therefore, there is an urgent need for a new type of sealing strip for curved light boxes to solve the above problems. Utility Model Content
[0003] To solve the aforementioned problems, this utility model provides a sealing strip for curved light boxes that is easy to operate, reduces material and labor costs, fits better to the edge of the light box, is less prone to light leakage, and is more aesthetically pleasing.
[0004] The technical solution adopted by this utility model is as follows: The sealing strip for the arc-shaped light box of this utility model includes a sealing strip body, the sealing strip body includes a base body and a polycarbonate plate fixing strip, and the polycarbonate plate fixing strip is longitudinally fixed above the base body.
[0005] Furthermore, the basic body includes a substrate and a sealing strip. The sealing strip is longitudinally fixed above the substrate and is arranged in an L-shape with a 90-degree clockwise rotation. The lower end of the sealing strip is connected to the central axis of the substrate, and the endurance plate fixing strip is fixed above the central axis of the sealing strip.
[0006] Furthermore, the bottom wall of the substrate is provided with two protrusions, which are symmetrically fixed below both ends of the substrate and are longitudinally arranged below the substrate.
[0007] Furthermore, the top wall of the substrate is provided with anti-slip texture one, which is located below the sealing strip, and the bottom wall of the sealing strip is provided with anti-slip texture two, which is located above the anti-slip texture one.
[0008] Furthermore, the top wall of the substrate is provided with a positioning groove, which is located on one side of the sealing strip.
[0009] The beneficial effects of this utility model using the above structure are as follows: The sealing strip for the curved light box proposed in this solution has been modified in appearance and structure. An endurance plate blocking strip has been added. It can be formed in one step during operation, which greatly reduces material and labor costs. The bottom has been changed from the original flat bottom to the current concave bottom. This allows the self-tapping screws to fit more closely to the edge of the light box, making it less prone to light leakage and more aesthetically pleasing. Attached Figure Description
[0010] Figure 1 This is a three-dimensional view of the sealing strip for the curved light box proposed in this solution;
[0011] Figure 2 This is the front view of the sealing strip for the curved light box proposed in this solution;
[0012] Figure 3 A 3D view showing the usage status of the sealing strip for the curved light box proposed in this solution;
[0013] Figure 4 This is an exploded view of the installation state of the sealing strip for the curved light box proposed in this solution.
[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. In the drawings: 1. Sealing strip body; 2. Basic body; 3. Polycarbonate sheet fixing strip; 4. Base plate; 5. Sealing strip; 6. Raised strip; 7. Anti-slip texture one; 8. Anti-slip texture two; 9. Positioning groove. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0016] like Figures 1-3 As shown, the sealing strip for the curved light box proposed in this solution includes a sealing strip body 1. The sealing strip body 1 includes a base body 2 and a polycarbonate plate fixing strip 3. The polycarbonate plate fixing strip 3 is longitudinally fixed above the base body 2.
[0017] like Figures 1-4 As shown, the basic body 2 includes a substrate 4 and a sealing strip 5. The sealing strip 5 is longitudinally fixed above the substrate 4. The sealing strip 5 is arranged in an L-shape with a clockwise rotation of 90 degrees. The lower end of the sealing strip 5 is connected to the central axis of the substrate 4. The endurance plate fixing strip 3 is fixed above the central axis of the sealing strip 5.
[0018] like Figure 1 , Figure 2 As shown, the bottom wall of the substrate 4 is provided with two protrusions 6, which are symmetrically fixed below both ends of the substrate 4. The protrusions 6 are longitudinally arranged below the substrate 4. The top wall of the substrate 4 is provided with anti-slip texture 1 7, which is located below the sealing strip 5. The bottom wall of the sealing strip 5 is provided with anti-slip texture 2 8, which is located above the anti-slip texture 1 7. The top wall of the substrate 4 is provided with a positioning groove 9, which is located on one side of the sealing strip 5.
[0019] In practical use, such as Figure 3 and Figure 4 As shown, four sealing strip bodies 1 of corresponding lengths are selected according to the length and width of the light box. The four sealing strip bodies 1 are spliced together, and the side walls of the upper and lower sealing strip bodies 1 that bend inward are treated with a serrated cut according to the curvature of the light box base. The cut releases the internal stress generated during the bending process, reducing the risk of springback and cracking. The cut can also guide the bending direction, making the bending more precise and controllable. No serrated cut is required when used in light boxes with relatively gentle curvature or when used for longitudinal sealing of the light box. The sealing strip body 1 is flush with the outer edge of the light box.
[0020] After installing and testing the light source inside the lightbox, self-tapping screws are used to align with the positioning grooves 9 on the substrate. The sealing strip body 1 is then fixed to the base layer of the lightbox using these screws. Next, a polycarbonate sheet is installed inside the lightbox, positioned on one side of the sealing strip body 1, and fixedly connected to the polycarbonate sheet fixing strip 3. The lightbox soft film is then placed on the outside of the lightbox, with its edges tucked into the four sealing strip bodies 1, so that the edges of the soft film are secured in the grooves formed by the substrate 4 and the sealing strips 5. Anti-slip textures 7 and 8 enhance the friction between the soft film and the sealing strip body 1, improving the film's fixation. This flexible installation method makes disassembling and replacing the lightbox hose more convenient. The process allows for one-time molding, significantly reducing material and labor costs. The bottom of the sealing strip body 1 becomes concave under the action of the two protruding strips 6, allowing it to fit more closely to the lightbox edges after installing the self-tapping screws, reducing light leakage and improving aesthetics.
[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sealing strip for curved light boxes, characterized in that: It includes a sealing strip body, which includes a base body and a polycarbonate plate fixing strip, wherein the polycarbonate plate fixing strip is longitudinally fixed above the base body.
2. The sealing strip for curved light boxes according to claim 1, characterized in that: The basic body includes a substrate and a sealing strip. The sealing strip is longitudinally fixed above the substrate and is arranged in an L-shape with a clockwise rotation of 90 degrees. The lower end of the sealing strip is connected to the central axis of the substrate.
3. The sealing strip for curved light boxes according to claim 2, characterized in that: The endurance plate fixing strip is fixed above the central axis of the sealing strip.
4. The sealing strip for curved light boxes according to claim 2, characterized in that: The bottom wall of the substrate is provided with two protrusions, which are symmetrically fixed below both ends of the substrate and are arranged longitudinally below the substrate.
5. The sealing strip for curved light boxes according to claim 2, characterized in that: The top wall of the substrate is provided with anti-slip texture one, which is located below the sealing strip. The bottom wall of the sealing strip is provided with anti-slip texture two, which is located above the anti-slip texture one.
6. The sealing strip for curved light boxes according to claim 2, characterized in that: The top wall of the substrate is provided with a positioning groove, which is located on one side of the sealing strip.