Light-blocking nixie tube convenient to install
By using double-sided adhesive foam instead of hot rivet in the assembly of digital tubes, the gaps and light leakage problems between the plastic shell and PCB are solved, and the assembly efficiency and display effect are improved.
Patent Information
- Application Number
- CN202421392287.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-18
AI Technical Summary
During the assembly process, the existing digital tubes are difficult to maintain the bonding surface due to the dimensional tolerances between the plastic case and the PCB, and there are gaps, resulting in light leakage problems. The thermal rivet assembly method is cumbersome and inefficient.
The assembly method of double-sided adhesive foam is adopted, including foam layer, front adhesive layer and reverse adhesive layer. The front adhesive layer and reverse adhesive layer are respectively applied to the plastic shell and PCB. There are wick grooves matching the luminous wick on the double-sided adhesive foam, which solves the gap problem between the plastic shell and PCB.
The assembly operation of plastic case and PCB is simplified, assembly efficiency is improved, light leakage is solved, the display effect of digital tubes is ensured, and subsequent maintenance is simplified.
Smart Images
Figure CN222597642U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of digital tubes, relates to the assembly of a plastic shell and a PCB, and in particular to a light-blocking digital tube which is easy to install. Background Art
[0002] The plastic shell and PCB (circuit board) are the two most important core components of the digital tube. In the assembly of the digital tube, the plastic shell and PCB are assembled and connected by hot riveting. Figure 1 As shown, specifically, the plastic shell 2 is preliminarily installed on the PCB1, and then the rivet column 4 on the PCB1 that protrudes from the plastic shell 2 is hot-riveted. After the hot riveting is completed, the assembly is completed, and the digital tube lights up the display area of the plastic shell 2 through the light-emitting wick 3 installed on the PCB1.
[0003] However, in actual application, due to the tolerance of the size of the plastic shell 2 and the PCB1, it is difficult to keep the joint surface of the plastic shell 2 and the PCB1 in contact after assembly. There is a gap between the plastic shell 2 and the PCB1, and the light of the light wick 3 is easily leaked due to the gap, affecting the display effect of the digital tube. In addition, the hot riveting assembly method requires hot riveting operations on a large number of rivet columns 4 one by one, which is not only time-consuming and labor-intensive, inefficient, but also inconvenient for subsequent repair and maintenance. Summary of the invention
[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, a light-blocking digital tube that is easy to install is provided, which adopts a double-sided adhesive foam assembly method instead of the existing hot riveting method. It is not only simple to operate, simplifies the assembly operation of the plastic shell and PCB, improves the assembly efficiency, but also solves the light leakage problem, and the display effect of the digital tube is guaranteed.
[0005] Technical solution: To achieve the above-mentioned purpose, the utility model provides a light-blocking digital tube that is easy to install, including a plastic shell, a PCB and a luminous wick installed on the PCB, a double-sided adhesive foam is arranged between the plastic shell and the PCB, the double-sided adhesive foam includes a foam layer, a front adhesive layer and a back adhesive layer, the front adhesive layer and the back adhesive layer are respectively located on the front and back of the foam layer, the front adhesive layer and the back adhesive layer are respectively applied to the plastic shell and the PCB, and a wick groove matching the luminous wick is arranged on the double-sided adhesive foam, and the wick groove is used to accommodate the luminous wick.
[0006] Furthermore, the front adhesive layer is a transparent PET base adhesive layer, and the transparent material does not affect the luminescence of the luminous wick at all.
[0007] Furthermore, the reverse adhesive layer is a black PET-based adhesive layer, and the black adhesive layer can block the sideways movement of light to achieve a better focusing effect.
[0008] Furthermore, the notch of the wick groove is located on the back adhesive layer, and the bottom of the groove is located on the front adhesive layer.
[0009] Furthermore, the height of the wick groove is greater than the height of the luminous wick, so that there is a certain space between the front adhesive layer and the luminous wick, so that when the double-sided adhesive foam is pressed down and contracted as a whole, the front adhesive layer will not contact the luminous wick, thereby avoiding affecting the luminous wick or causing damage to the luminous wick.
[0010] Beneficial effects: Compared with the prior art, the utility model adopts double-sided adhesive foam to replace the existing hot riveting method to realize the assembly of the plastic shell and PCB in the digital tube, which has the following advantages:
[0011] 1. The double-sided adhesive foam is a prefabricated structure. When assembling, you only need to stick it directly on the PCB, and then install the plastic shell directly on the front of the double-sided adhesive foam. The whole operation is very convenient and fast, which simplifies the assembly operation of the plastic shell and PCB and improves the assembly efficiency.
[0012] 2. Due to the flexible nature of the double-sided adhesive foam, it can ensure that there will be no gap between the plastic shell and the PCB, solving the light leakage problem caused by the gap between the plastic shell and the PCB, and the display effect of the digital tube is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of a digital tube using an existing hot riveting assembly method;
[0014] Figure 2 This is a schematic diagram of the structure of the digital tube in the utility model;
[0015] Figure 3 A schematic diagram of the assembly jig. DETAILED DESCRIPTION
[0016] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.
[0017] like Figure 2As shown, the utility model provides a light-blocking digital tube that is easy to install, including a plastic shell 2, a PCB1 and a plurality of light-emitting wicks 3 installed on the PCB1, a double-sided adhesive foam is arranged between the plastic shell 2 and the PCB1, the double-sided adhesive foam includes a foam layer 5, a front adhesive layer 7 and a back adhesive layer 6, the front adhesive layer 7 and the back adhesive layer 6 are respectively located on the front and back of the foam layer 5, the front adhesive layer 7 and the back adhesive layer 6 are respectively applied to the plastic shell 2 and the PCB1, a wick groove 8 matching the light-emitting wick 3 is arranged on the double-sided adhesive foam, the notch of the wick groove 8 is located on the back adhesive layer 6, the bottom of the groove is located on the front adhesive layer 7, the height of the wick groove 8 is greater than the height of the light-emitting wick 3, the light-emitting wick 3 is located in the wick groove 8, the front adhesive layer is a transparent PET base adhesive layer, and the back adhesive layer is a black PET base adhesive layer.
[0018] The installation process of the above light-blocking digital tube is as follows:
[0019] First, apply the front adhesive layer 7 and the back adhesive layer 6 to the front and back of the foam layer 5 respectively, and according to the number and size of the light-emitting wicks 3 on the PCB1, process them into corresponding wick grooves 8 to realize the prefabrication of the double-sided adhesive foam, and then apply the back adhesive layer 6 of the double-sided adhesive foam to the PCB1. This process can be positioned by a jig. At this time, the light-emitting wicks 3 are located in the wick grooves 8. Finally, install the plastic shell 2 on the front adhesive layer 7 to realize the assembly of the digital tube.
[0020] In order to further improve the assembly efficiency in this embodiment, Figure 3 The jig shown includes a positioning plate 9 and two positioning posts 10 arranged on the positioning plate 9. Four PCBs 1 are spliced together to form a PCB assembly board. The PCB assembly board is provided with positioning holes matching the positioning posts 10. During assembly, it is only necessary to place the PCB assembly board on the positioning plate 9 through the two positioning posts 10, and then install the double-sided adhesive foam and the plastic shell 2 on the PCB1 respectively. In this way, the assembly of four digital tubes can be completed at one time, further improving the assembly efficiency.
[0021] The entire assembly process of the digital tube can be realized with simple operations. Compared with the hot riveting method, the assembly operation of the plastic shell 2 and the PCB 1 is simplified, and the assembly efficiency is improved.
[0022] The assembled digital tube mentioned above can ensure that there is no gap between the plastic shell 2 and the PCB1 because the double-sided adhesive foam has excellent elasticity. Even if the digital tube is subjected to some external force, the double-sided adhesive foam will maintain the sealing due to its elasticity. In addition, the wick groove 8 brings a focusing effect to the light-emitting wick 3, which solves the light leakage problem and ensures the display effect of the digital tube.
Claims
1. A light-blocking digital tube that is easy to install, comprising a plastic shell, a PCB and a light-emitting lamp core installed on the PCB, characterized in that: A double-sided adhesive foam is arranged between the plastic shell and the PCB, and the double-sided adhesive foam includes a foam layer, a front adhesive layer and a back adhesive layer. The front adhesive layer and the back adhesive layer are respectively located on the front and back of the foam layer. The front adhesive layer and the back adhesive layer are respectively applied to the plastic shell and the PCB. A wick groove matching the light-emitting wick is arranged on the double-sided adhesive foam, and the wick groove is used to accommodate the light-emitting wick.
2. The light-blocking digital tube that is easy to install according to claim 1, characterized in that: The front adhesive layer is a transparent PET base adhesive layer.
3. The light-blocking digital tube that is easy to install according to claim 1, characterized in that: The reverse adhesive layer is a black PET base adhesive layer.
4. The light-blocking digital tube that is easy to install according to claim 1, characterized in that: The notch of the wick groove is located on the back adhesive layer, and the bottom of the groove is located on the front adhesive layer.
5. The light-blocking digital tube that is easy to install according to claim 4, characterized in that: The height of the wick groove is greater than the height of the light-emitting wick.