Screen structure of a refrigerated vending machine

Abstract

The utility model relates to cold -stored vending machine technical field discloses a screen structure of cold -stored vending machine, including first glass, LCD screen, second glass, diffusion plate and third glass from left to right setting in proper order, diffusion plate presents rectangular frame body structure setting, diffusion plate is provided with a plurality of lighting lamp strips for providing light source in, the shape size of first glass, second glass and diffusion plate is same setting, the outer edge of first glass, second glass and diffusion plate is alignment setting, the shape size of LCD screen is less than the shape size setting of first glass, the utility model discloses setting diffusion plate of rectangular frame body structure, and lighting lamp strip is set in diffusion plate, when using, the light of lighting lamp strip power -on can evenly irradiate on LCD screen after diffusing through diffusion plate, has the advantages such as screen edge light distribution is sufficient, light overall distribution is even, picture display effect is good.

Description

Technical Field

[0001] This utility model relates to a screen structure for a refrigerated vending machine, and belongs to the technical field of refrigerated vending machines. Background Technology

[0002] Currently, with the rapid development of commercial automation, refrigerated vending machines are being used more and more widely in daily life. As an important device for product display and sales, the screen of a refrigerated vending machine not only serves functions such as displaying product information and guiding transaction operations, but also influences consumers' purchasing decisions and user experience to a certain extent. Therefore, the display quality of the screen has become one of the key indicators for measuring the performance of a refrigerated vending machine.

[0003] Currently, most refrigerated vending machine screens on the market use traditional backlighting, typically powered by LED strips. However, this backlighting method has significant limitations. Due to the inherent light-emitting characteristics of the LED strips and the screen structure, uneven light distribution is a prominent issue during propagation. Particularly at the edges of the screen, the light often fails to cover the area evenly, resulting in a significant brightness difference between the edges and the center, creating noticeable unevenness. This uneven display significantly impacts consumers' ability to access product information and their experience operating the screen. When there are significant brightness differences, consumers may find it difficult to clearly view important information such as product images and prices due to visual discomfort, thus reducing the convenience and efficiency of shopping. Furthermore, uneven lighting can distort the displayed image, reduce color reproduction, and fail to accurately represent the appearance and characteristics of the products, further affecting consumers' willingness to purchase.

[0004] To address the issue of uneven screen lighting, several methods have been attempted in existing technologies. For example, increasing the number of LEDs or adding diffuser films can improve light distribution. While increasing the number of LEDs can improve overall brightness and thus solve the problem of insufficient light at the screen edges, it doesn't adjust the overall light distribution and also increases cost and energy consumption. Adding diffuser films only provides preliminary scattering of light and cannot effectively regulate the light at the screen edges. Utility Model Content

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a screen structure for a refrigerated vending machine.

[0006] The technical solution of this utility model is as follows: A screen structure for a refrigerated vending machine includes a first glass, an LCD screen, a second glass, a diffuser plate, and a third glass arranged sequentially from left to right. The diffuser plate has a rectangular frame structure and contains several lighting strips for providing light sources. When the lighting strips are powered on, the light generated is diffused by the diffuser plate and shines on the LCD screen. The outer edges of the first glass, the second glass, and the diffuser plate are the same in shape and size, and the outer edges of the first glass, the second glass, and the diffuser plate are aligned. The LCD screen is smaller in shape and size than the first glass.

[0007] The first glass and the second glass each have a placement slot adapted to the shape and size of the LCD screen. The two placement slots are spliced ​​together to form a placement space for placing the LCD screen, which is placed in the placement space.

[0008] The first glass, the second glass, the diffuser plate, and the third glass are bonded together in sequence.

[0009] The diffuser plate has a plurality of first positioning posts on one side and a plurality of second positioning posts on the other side. The first glass and the second glass are each provided with a first positioning hole that corresponds one-to-one with the first positioning post. The third glass is provided with a second positioning hole that corresponds one-to-one with the second positioning post. The first glass and the second glass are both placed on the diffuser plate after passing through each first positioning hole and the corresponding first positioning post. The third glass is placed on the diffuser plate after passing through each second positioning hole and the corresponding second positioning post.

[0010] The first positioning post and the second positioning post are both arranged in a circular columnar structure, and several glue outlet holes are opened on the peripheral sidewalls of the first positioning post and the second positioning post.

[0011] The diffuser plate is further provided with a baffle plate on its outer side. The baffle plate is a rectangular frame structure. The baffle plate and the diffuser plate together form a first mounting groove for installing the first glass and the second glass and a second mounting groove for installing the third glass on both sides of the diffuser plate. The side wall of the first mounting groove is also covered with reflective paper.

[0012] This utility model has the following beneficial effects: This invention utilizes a structure comprising a first glass, an LCD screen, a second glass, and a diffuser plate. The diffuser plate is designed as a rectangular frame, with lighting strips housed within it. The outer edges of the first glass, second glass, and diffuser plate are identical in shape and size, and aligned. During use, the light generated by the lighting strips, once powered on, is diffused through the diffuser plate and evenly illuminates the LCD screen, particularly the edges. This effectively solves the problem of insufficient light at the screen edges and allows for effective adjustment of light intensity and uniformity at the screen edges, resulting in superior image display. Compared to existing technologies, this invention offers advantages such as ample light distribution at the screen edges, uniform overall light distribution, and excellent image display. Attached Figure Description

[0013] Figure 1 This is an isometric view of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the diffuser plate in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 4 This is a partial cross-sectional view of the diffuser plate in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 6 for Figure 5 Enlarged view of point A in the image; Figure 7 This is a structural schematic diagram of Embodiment 3 of the present invention; Figure 8 for Figure 7 Enlarged view of point B in the image.

[0014] The reference numerals in the figure are as follows: 1. First glass; 2. LCD screen; 3. Second glass; 4. Diffuser plate; 5. Third glass; 6. Lighting strip; 7. Placement slot; 8. Placement space; 9. First positioning post; 10. Second positioning post; 11. First positioning hole; 12. Second positioning hole; 13. Adhesive outlet hole; 14. Baffle; 15. First mounting slot; 16. Second mounting slot; 17. Reflective paper; m. Insertion slot. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] Example 1: Please refer to Figures 1-4This embodiment provides a screen structure for a refrigerated vending machine, including a first glass 1, an LCD screen 2, a second glass 3, a diffuser plate 4, and a third glass 5 arranged sequentially from left to right. The diffuser plate 4 has a rectangular frame structure and contains several lighting strips 6 for providing light sources. The number of lighting strips 6 can be selected according to actual needs. In this embodiment, there are four lighting strips 6, one on each side of the diffuser plate 4. The diffuser plate 4 can be configured with corresponding insertion slots m on each side for the insertion and installation of the lighting strips 6. Each side of the diffuser plate 4 also has a propagation space n for light propagation, which is positioned close to the lamp bead portion of the corresponding lighting strip 6. The lamp bead portions of the four lighting strips 6 can be vertically arranged or slightly tilted towards the LCD screen 2, so that the light generated by the lighting strips 6 after being powered on can be better illuminated on the LCD screen 2 after being diffused by the diffuser plate 4, thereby enabling the LCD screen 2 to perform the required display work. Meanwhile, the two side walls of each side of the diffuser plate 4, as well as the side wall away from the LED beads of the lighting strip 6, are opaque, with only the side wall facing the LED beads of the lighting strip 6 being transparent. This effectively prevents light from scattering, thereby improving the overall brightness of the screen structure. Furthermore, the side wall of each side of the diffuser plate 4 facing the LED beads of the lighting strip 6 is recessed towards the LED beads of the lighting strip 6, forming a lens-like structure. By utilizing the principle of a lens, light can be focused first and then scattered, thereby increasing the luminous efficacy and further enhancing the overall brightness of the screen structure. The outer edges of the first glass 1, the second glass 3, and the diffuser plate 4 are of the same shape and size, and are aligned. The LCD screen 2 is smaller than the first glass 1. Specifically, its shape and size can be smaller than the outer edge of the diffuser plate 4 but larger than the inner edge of the diffuser plate 4. It can be adapted to the rectangular shape formed by the four lighting strips 6 inside the diffuser plate 4, so as to ensure that the light emitted by the lighting strips 6 can illuminate the edge of the LCD screen 2 well after passing through the diffuser plate 4.

[0017] With the aforementioned setup, during use, the lighting strip 6 is connected to an external power supply line and then powered on. When powered on, the LEDs in the lighting strip 6 emit light, which shines towards the LCD screen 2. After being diffused by the diffuser plate 4, the light is evenly distributed across the LCD screen 2, particularly illuminating the edges. This effectively solves the problem of insufficient light at the screen edges and also effectively adjusts the light intensity and uniformity at the screen edges, resulting in excellent image display. The diffuser plate 4 can be made of materials such as PMMA (polymethyl methacrylate), PS (polystyrene), or PET (polyethylene terephthalate). PMMA has a light transmittance of approximately 92%, PS has a light transmittance of 80%–88%, and PET has a light transmittance of 80%–85%. The specific material used for the diffuser plate 4 can be selected and adjusted according to actual needs. By adjusting the light diffusion and transmittance capabilities, the overall screen brightness can be adjusted to meet the needs of different consumers.

[0018] To facilitate the rapid installation of the LCD screen 2, in this embodiment, a placement groove 7 adapted to the shape and size of the LCD screen 2 is provided on the right side of the first glass 1 and the left side of the second glass 3. The two placement grooves 7 are spliced ​​together to form a placement space 8 for placing the LCD screen 2. The LCD screen 2 can be placed between the first glass 1 and the second glass 3 by placing it in the placement space 8, which enables the rapid installation of the LCD screen 2.

[0019] In this embodiment, the screen structure is assembled by sequentially bonding the first glass 1, the second glass 3, the diffuser plate 4, and the third glass 5 together using common adhesives such as optically transparent adhesive and silicone structural adhesive. Specifically, the assembly method is as follows: First, apply adhesive to the sidewall of the diffuser plate 4 closest to the third glass 5, and then bond it to the third glass 5. Next, apply adhesive to the placement grooves 7 on both sides and to the sidewall of the second glass 3 closest to the first glass 1. Then, place the LCD screen 2 in the placement groove 7, and then cover the second glass 3 with the first glass 1, bonding the first glass 1, LCD screen 2, and second glass 3 together. Finally, apply adhesive to the sidewall of the diffuser plate 4 closest to the second glass 3, and then bond it to the second glass 3. This completes the assembly of the screen structure.

[0020] Since this screen structure is used in a refrigerated vending machine, water vapor may appear on the screen structure due to temperature differences. To avoid this, the glass on the side of the refrigerated compartment of the screen structure, namely the third glass 5, is selected as glass with electric heating function in the prior art. The first glass 1 and the second glass 3 can be selected as tempered glass, explosion-proof glass, etc. in the prior art as needed.

[0021] To further facilitate the assembly of this screen structure and achieve rapid installation, an embodiment two is proposed based on embodiment one.

[0022] Example 2: Please refer to Figure 5 and Figure 6 This embodiment provides a screen structure for a refrigerated vending machine, including all the structures in Embodiment 1. Further, a plurality of first positioning posts 9 are provided on the wall of the diffuser plate 4 near the first glass 1, and a plurality of second positioning posts 10 are provided on the other wall of the diffuser plate 4. The specific number and distribution of the first positioning posts 9 and the second positioning posts 10 on the diffuser plate 4 can be selected according to actual conditions. In this embodiment, there are four first positioning posts 9 and four second positioning posts 10, all rectangularly distributed on the diffuser plate 4 and located at the four apex corners of the diffuser plate 4. First positioning holes 11, corresponding one-to-one with the first positioning posts 9, are provided on the first glass 1 and the second glass 3. Second positioning holes 12, corresponding one-to-one with the second positioning posts 10, are provided on the third glass 5. The first glass 1 and the second glass 3 can be placed on the diffuser plate 4 by passing through each first positioning hole 11 and corresponding first positioning post 9, and the third glass 5 can be placed on the diffuser plate 4 by passing through each second positioning hole 12 and corresponding second positioning post 10. This enables rapid positioning of the first glass 1, second glass 3, and third glass 5 against the diffuser plate 4, facilitating the assembly of the screen structure. To ensure the aforementioned positioning effect, the length of the first positioning post 9 should be compatible with the thickness of both the first glass 1 and the second glass 3, and the length of the second positioning post 10 should be compatible with the thickness of the third glass 5. This ensures that the first glass 1 and the second glass 3 are not prone to detachment or displacement when positioned on the diffuser plate 4 via the first positioning post 9 and the first positioning hole 11, and that the third glass 5 is not prone to detachment or displacement when positioned on the diffuser plate 4 via the second positioning post 10 and the second positioning hole 12.

[0023] It should be noted that the first positioning post 9 and the second positioning post 10 should be positioned away from the placement slot 7 to avoid adverse effects on the installation of the LCD screen 2.

[0024] To further enhance the stability of the screen structure, in this embodiment, the first positioning post 9 and the second positioning post 10 are both arranged in a circular columnar structure. A plurality of glue outlet holes 13 are provided on the peripheral sidewalls of the first positioning post 9 and the second positioning post 10. The specific number and distribution of glue outlet holes 13 can be selected and set according to the actual situation, and are not limited here.

[0025] With the aforementioned setup, during the assembly of this screen structure, the first glass 1, the second glass 3, the diffuser plate 4, and the third glass 5 are sequentially bonded together using common adhesives such as optically transparent adhesive and silicone structural adhesive. Specifically, the assembly method is as follows: First, apply adhesive to the sidewall of the diffuser plate 4 closest to the third glass 5. Then, quickly bond the third glass 5 to the diffuser plate 4 using the second positioning hole 12 and the second positioning post 10. Next, apply adhesive to the sidewall of the diffuser plate 4 closest to the second glass 3, apply adhesive to the sidewall of the second glass 3 closest to the first glass 1, and apply adhesive to the placement grooves 7 on both sides. Sequentially bond the second glass 3, the LCD screen 2, and the first glass 1 together, and quickly bond the first glass 1 and the second glass 3 to the diffuser plate 4 using the first positioning hole 11 and the first positioning post 9. Then, glue can be injected into the first positioning post 9 and the second positioning post 10. The injected glue enters the gap between the first positioning post 9 and the first positioning hole 11 and the gap between the second positioning post 10 and the second positioning hole 12 through the glue outlet 13. This increases the number of connection points of the overall structure of the screen, that is, the connection points between the first glass 1 and the second glass 3 and the first positioning post 9, and the connection points between the third glass 5 and the second positioning post 10, thereby enhancing the stability of the screen structure.

[0026] To improve the overall brightness of this screen structure, an embodiment three is proposed based on embodiment one.

[0027] Example 3: Please refer to Figure 7 and Figure 8This embodiment provides a screen structure for a refrigerated vending machine, including all the structures in Embodiment 1. Furthermore, a baffle 14 is provided on the outer side of the diffuser plate 4. The baffle 14 is made of an opaque material to prevent subsequent light scattering, thereby improving the overall brightness of the screen structure. The baffle 14 has a rectangular frame structure. The baffle 14, in conjunction with the diffuser plate 4, forms a first mounting groove 15 for mounting the first glass 1 and the second glass 3, and a second mounting groove 16 for mounting the third glass 5 on both sides of the diffuser plate 4. The depth of the first mounting groove 15 is the same as the thickness of the first glass 1 and the second glass 3 to ensure the subsequent installation effect of the first glass 1 and the second glass 3. The depth of the second mounting groove 16 is the same as the thickness of the third glass 5 to ensure the subsequent installation effect of the third glass 5. Reflective paper 17 is also attached to the peripheral sidewalls of the first mounting groove 15, covering the peripheral sidewalls of the first mounting groove 15. With the aforementioned setup, part of the light emitted by the lighting strip 6 will shine onto the reflective paper 17. The reflective paper 17 can reflect this part of the light onto the LCD screen 2, thereby improving the overall brightness of the screen structure. Furthermore, the placement of the reflective paper 17 close to the edge of the LCD screen 2 can further ensure the intensity of the light at the edge of the LCD screen 2, making it closer to the light intensity at the center of the LCD screen 2, thus giving the screen a good image display effect.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

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