Conductive structure for electrochromic rearview mirror

Abstract

The utility model discloses a kind of electrochromic rearview mirror's conductive structure, including the upper layer lens and lower layer lens of stacked arrangement, upper layer lens and / or lower layer lens surface is provided with insulating ink layer, and the conductive area reserved on insulating ink layer is provided with conductive sheet, and conductive sheet one side is coated with silver paste pre-coating layer.The utility model, without manual secondary spraying silver paste when producing, simplify processing step and reduce production cost;And the height between upper and lower layers is fixed, product does not separate when suffering vibration or external force impact, effectively increase the contact area and anti-vibration performance of silver paste and conductive sheet, improve conductive performance.

Description

Technical Field

[0001] This utility model relates to the field of rearview mirror technology, specifically to a conductive structure of an electrochromic rearview mirror. Background Technology

[0002] The EC anti-glare rearview mirror is an advanced automotive rearview mirror device that utilizes electrochromic (EC) technology. It automatically adjusts the mirror's reflectivity based on the intensity of light from behind, effectively preventing glare from rear vehicle headlights from interfering with the driver's vision. When a vehicle's headlights shine brightly from behind, a sensor quickly captures the light signal and transmits it to the controller. The controller immediately activates the electrochromic function, altering the molecular arrangement of the electrolyte within the mirror to darken the mirror's color, reducing reflectivity and weakening the interference of strong rear light. In low-light conditions, the mirror returns to its normal state, ensuring the driver has a clear view. This intelligent adjustment function helps drivers see the road clearly at night or in bright light conditions while avoiding visual fatigue and safety hazards caused by glare.

[0003] The existing electrochromic frameless rearview mirror conductive structure requires multiple steps in its fabrication process, including installing conductive sheets, applying silver paste, and manually applying a second layer of silver paste to enhance conductivity. This results in complex processes and high material and labor costs. Furthermore, the small contact area between the silver paste and the conductive sheet makes it prone to cracking and separation under vibration or external impact, which can easily lead to open circuit failures, resulting in low product yield and high production costs. Utility Model Content

[0004] The purpose of this invention is to provide a conductive structure for an electrochromic rearview mirror in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including: an upper lens and a lower lens stacked together;

[0006] An insulating ink layer is provided on the surface of the upper lens and / or lower lens, and a conductive sheet is provided on the conductive area reserved in the insulating ink layer. One side of the conductive sheet is coated with a silver paste pre-coating.

[0007] As a further description of the above technical solution, the upper lens and the lower lens are stacked to form a filling cavity, which is used to fill the color-changing liquid.

[0008] As a further description of the above technical solution, the outer contours of the opposing portions of the upper and lower lenses are parallel, and the distance between the upper and lower lenses is constant.

[0009] As a further description of the above technical solution, the insulating ink layer is symmetrically disposed at the edges of the upper lens and / or the lower lens.

[0010] As a further description of the above technical solution, the insulating ink layer symmetrically reserves one or more sets of conductive areas, which are used to attach conductive sheets.

[0011] As a further description of the above technical solution, the conductive region includes a positive conductive region and a negative conductive region, and the length of the conductive region is 2%-5% of the length of the insulating ink layer.

[0012] As a further description of the above technical solution, an adhesive tape layer is bonded to the outside of the conductive sheet, and the adhesive tape layer is made of black adhesive tape.

[0013] As a further description of the above technical solution, the conductive sheet is symmetrically bonded to the conductive area of ​​the insulating ink layer by adhesive tape.

[0014] As a further description of the above technical solution, the conductive areas of the insulating ink layer are pre-coated with silver paste by screen printing.

[0015] As a further description of the above technical solution, the silver paste pre-coating is dotted on the outer side of the conductive sheet.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This utility model eliminates the need for manual secondary spraying of silver paste during production, simplifying the processing steps and reducing production costs;

[0018] 2. In this utility model, the height between the upper and lower layers is fixed, and the product will not separate when subjected to vibration or external impact. This effectively increases the contact area between the silver paste and the conductive sheet, improves the vibration resistance, and enhances the conductivity.

[0019] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the conductive structure of the electrochromic rearview mirror of this utility model;

[0021] Figure 2 This is a schematic diagram of the conductive structure of the electrochromic rearview mirror of this utility model. Figure 2 ;

[0022] Figure 3 This is a cross-sectional schematic diagram of the conductive structure of the electrochromic rearview mirror of this utility model.

[0023] Figure label:

[0024] 1. Upper lens; 2. Lower lens; 3. Insulating ink layer; 4. Conductive sheet; 5. Conductive area; 51. Positive conductive area; 52. Negative conductive area; 6. Filling cavity; 7. Adhesive tape layer; 8. Silver paste pre-coating layer. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] like Figures 1-3 As shown, in one embodiment, a conductive structure of an electrochromic rearview mirror includes: an upper lens 1 and a lower lens 2 stacked together.

[0027] The upper lens 1 and / or the lower lens 2 are provided with an insulating ink layer 3, which not only serves as insulation to prevent unnecessary current conduction, but also protects the lens to a certain extent, preventing the internal filling liquid from being corroded by external environmental factors. In addition, a conductive sheet 4 is provided on the conductive area 5 reserved in the insulating ink layer 3. The conductive sheet 4 serves as a component for conducting current, and one side of it is coated with a silver paste pre-coating layer 8. The silver paste pre-coating layer 8 has good conductivity, which can further enhance the conductivity of the entire structure and ensure that the current can pass through smoothly.

[0028] Understandably, in existing production processes, manual secondary spraying of silver paste is an indispensable but rather tedious step. Furthermore, during the operation, uneven application and inconsistent thickness can easily occur when different operators spray the silver paste, affecting the quality stability of the product. In this application, since the manual secondary spraying of silver paste is eliminated, the processing steps can be effectively simplified. Moreover, the amount of silver paste used can be effectively reduced, thereby effectively lowering production costs.

[0029] Furthermore, the upper lens 1 and the lower lens 2 are stacked together to form the filling cavity 6, which is used to fill the color-changing liquid.

[0030] Specifically, the outer contours of the facing portions of the upper lens 1 and the lower lens 2 remain parallel, and the distance between the upper lens 1 and the lower lens 2 remains constant.

[0031] Understandably, in actual use, the product will inevitably encounter various vibrations or be subjected to external impacts. Since the distance between the upper and lower lens 2 is fixed, a tight and stable connection structure is formed between the two lens layers, ensuring that the upper lens 1 and the lower lens 2 will not be relatively displaced or separated when the product is subjected to vibration or external impact. Furthermore, since the contact area between the silver paste and the conductive sheet 4 is large, the current conduction path is more stable and smooth, thereby improving the conductivity of the entire structure.

[0032] Please continue reading. Figures 1-2 In this embodiment, the insulating ink layer 3 is symmetrically disposed at the edges of the upper lens 1 and / or the lower lens 2. The insulating ink layer 3 has one or more sets of conductive areas 5 symmetrically reserved for attaching the conductive sheet 4. In actual production, one or more sets of conductive areas 5 can be flexibly selected according to actual product requirements to adapt to different functional and circuit design requirements.

[0033] Specifically, the conductive region 5 includes a positive conductive region 51 and a negative conductive region 52, which clarifies the direction of current flow in the lens structure; while the length of the conductive region 5 is 2%-5% of the length of the insulating ink layer 3, which ensures that the conductive sheet 4 has enough area for current conduction and makes reasonable use of the space of the insulating ink layer 3.

[0034] Furthermore, an adhesive tape layer 7 is bonded to the outside of the conductive sheet 4, and the adhesive tape layer 7 is black tape. Black tape has the characteristics of good light-blocking and light-impermeability, which can reduce the influence of external light on the photochromic liquid and conductive area 5 inside the lens to a certain extent. Correspondingly, the conductive sheet 4 is symmetrically bonded to the conductive area 5 of the insulating ink layer 3 by the tape, avoiding the problem of unstable electrical performance caused by inaccurate or asymmetrical bonding position.

[0035] It should be explained in detail that the conductive area 5 of the insulating ink layer 3 is printed with a silver paste pre-coating layer 8 by a screen printing plate. The silver paste pre-coating layer 8 is dotted on the outside of the conductive sheet 4, which improves the efficiency of current conduction while reducing the amount of silver paste used.

[0036] It should be explained in detail that a conductive silver paste layer is pre-printed on the bonding position of the positive and negative conductive sheets 4 using screen printing. The specific steps are as follows:

[0037] (1) A 250-mesh screen printing plate is used, with a pattern size of 7mm in length and 0.9mm in width. The 250-mesh screen printing plate can make the lines of the screen printing finer and more uniform while ensuring printing accuracy, thereby obtaining a high-quality printed pattern. The specific length and width pattern size is designed according to the shape of the conductive sheet 4 and the actual needs of current conduction, which can ensure good contact and conductivity between the silver paste pre-coating layer 8 and the conductive sheet 4 to the greatest extent.

[0038] (2) Pour the silver paste into the screen and scrape it at a uniform speed to the designated position on the glass substrate: uniform scraping can ensure that the thickness of the silver paste on the glass substrate is uniform and consistent, and avoid the silver paste being too thick or too thin in some places, thus affecting the conductivity.

[0039] (3) After screen printing, the glass is baked at 120°C for 60 minutes to cure: This allows the silver paste to fully cure and achieve the best conductivity and stability.

[0040] Furthermore, the assembly process includes: sequentially bonding the upper lens 1 and the lower lens 2 to ensure that the two lenses can be tightly and flatly bonded together to form a stable and uniform filling cavity 6; after bonding, a curing process is performed to firmly bond the upper and lower lenses 2; after curing, electrochromic liquid is poured in and sealed; then, the conductive sheet 4 is bonded to the pre-printed silver paste area using black adhesive; finally (eliminating the manual secondary spraying of silver paste) a single layer of silver paste is directly applied by the equipment to complete the conduction.

[0041] With the above technical solution, no manual secondary spraying of silver paste is required during the production of this application, which simplifies the processing steps and reduces the production cost; the height between the upper and lower layers is fixed, and the product will not separate when subjected to vibration or external impact, which effectively increases the contact area between the silver paste and the conductive sheet 4 and the vibration resistance, and improves the conductivity.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A conductive structure for an electrochromic rearview mirror, comprising an upper lens (1) and a lower lens (2) stacked together, characterized in that: An insulating ink layer (3) is provided on the surface of the upper lens (1) and / or the lower lens (2). A conductive sheet (4) is provided on the conductive area (5) reserved in the insulating ink layer (3). A silver paste pre-coating layer (8) is coated on one side of the conductive sheet (4). The upper lens (1) and the lower lens (2) are stacked to form a filling cavity (6), which is used to fill the color-changing liquid; The outer contours of the facing portions of the upper lens (1) and the lower lens (2) are parallel, and the distance between the upper lens (1) and the lower lens (2) is constant; The insulating ink layer (3) is symmetrically disposed at the edges of the upper lens (1) and / or the lower lens (2); The insulating ink layer (3) has one or more sets of conductive areas (5) symmetrically reserved, and the conductive areas (5) are used to attach the conductive sheet (4). The conductive region (5) includes a positive conductive region (51) and a negative conductive region (52), and the length of the conductive region (5) is 2%-5% of the length of the insulating ink layer (3).

2. The conductive structure of the electrochromic rearview mirror according to claim 1, characterized in that, The conductive sheet (4) is bonded with an adhesive tape layer (7), which is black adhesive tape.

3. The conductive structure of the electrochromic rearview mirror according to claim 2, characterized in that, The conductive sheet (4) is symmetrically bonded to the conductive area (5) of the insulating ink layer (3) by tape.

4. The conductive structure of the electrochromic rearview mirror according to claim 3, characterized in that, The conductive area (5) of the insulating ink layer (3) is pre-coated with silver paste (8) by screen printing.

5. The conductive structure of the electrochromic rearview mirror according to claim 4, characterized in that, The silver paste pre-coating (8) is dotted on the outside of the conductive sheet (4).

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