Wood-based electronic tag
By creating spiral grooves in the wood-based card substrate to fill with conductive medium and adopting a split conductive bridge structure, the problems of seamless coil connection and cross-wire connection on the wood-based substrate are solved, resulting in high-quality wood-based electronic tags that combine environmental protection and excellent performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-24
AI Technical Summary
Existing technologies struggle to form high-quality, seamless coils on wood-based substrates and solve cross-wire connection issues, affecting the aesthetics and reliability of wooden cards.
Spiral grooves are made in the wooden card substrate and filled with conductive medium to form an electronic coil. A split conductive bridge structure with an insulated lower bridge and a conductive upper bridge is adopted to achieve a reliable electrical connection between the coil and the chip.
This effectively prevents the coil from forming outline marks on the card surface, improves the smoothness and natural aesthetic texture of the appearance, ensures the reliability and insulation of the circuit connection, and improves the product yield and stability.
Smart Images
Figure CN224035914U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to IC card technical field, more particularly, relate to a wooden base electronic tag. BACKGROUND
[0002] With the improvement of environmental awareness and the trend of personalized consumption, the IC card made of natural wood is gradually becoming an important development direction besides the traditional plastic IC card because of its unique texture, aesthetic value and environmental protection concept. However, it is a significant technical challenge to integrate electronic functional components such as chips and antenna coils into the natural substrate of wood which has porosity, anisotropy and moisture sensitivity, and there is a huge difference from the mature plastic card manufacturing process.
[0003] At present, a common wood-based electronic tag manufacturing method is to laminate the pre-made "electronic tag inner core" (Inlay) between two wood slices. Although this method simplifies the difficulty of directly making a coil on wood, its disadvantages are increasingly prominent: the Inlay increases the number of card layers and possible thickness, and more importantly, the internal coil structure (especially the metal coil with a certain thickness) is extremely easy to form a contour mark (ghost effect) on the surface of the wood card after lamination, which is more obvious after long-term use or pressure, which seriously damages the natural smooth appearance and pure texture pursued by wood cards and affects the aesthetic quality of the product. As for etching or printing conductive ink on the surface of wood to form a coil, it is limited by the surface texture and pores of wood, and it is difficult to ensure the precision, yield and long-term reliability of fine coils.
[0004] Therefore, how to provide a wood-based electronic tag scheme capable of forming high-quality, traceless coils inside the wood substrate and effectively solving the cross-line connection problem has become a technical problem to be solved. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a wood-based electronic tag scheme capable of forming high-quality, traceless coils inside the wood substrate and effectively solving the cross-line connection problem.
[0006] The utility model provides a wood-based electronic tag, which comprises:
[0007] A first wood card substrate and a second wood card substrate;
[0008] The second wood card substrate is provided with a spiral groove spirally coiled for multiple turns from inside to outside, and the spiral groove is filled with a conductive medium to form an electronic coil;
[0009] A chip has at least a first electrical contact and a second electrical contact, and the chip is arranged between the first wood card substrate and the second wood card substrate;
[0010] The first end of the electronic coil, i.e. the inner coil end, is electrically connected to the first electrical contact of the chip;
[0011] A conductive bridge is arranged between the first wooden card base and the second wooden card base and across at least part of the coil turns of the spiral groove, and is used to form an electrical connection path between the second end of the electronic coil, i.e. the outer coil end, and the second electrical contact of the chip;
[0012] The conductive bridge comprises an insulating lower bridge body and a conductive upper bridge body; the lower bridge body is arranged close to the second wooden card base and has through holes at both ends thereof; the upper bridge body is arranged close to the first wooden card base and has protrusions at both ends of one side surface thereof which extend downward into the through holes;
[0013] One of the protrusions of the upper bridge body is electrically connected to the conductive medium filled in the tail end of the spiral groove;
[0014] The other protrusion of the upper bridge body is connected to the second electrical contact of the chip via the electrical connection path;
[0015] The first wooden card base and the second wooden card base are attached to each other, and the electronic coil, the chip and the conductive bridge are accommodated therebetween, forming a closed circuit composed of the chip and the electronic coil.
[0016] Optionally, the second wooden card base is further provided with a connecting groove filled with conductive medium; the other protrusion of the upper bridge body is electrically connected to the second electrical contact of the chip through the conductive medium filled in the connecting groove.
[0017] Optionally, the connecting groove is linear and located on the inner coil side of the electronic coil.
[0018] Optionally, the first wooden card base is provided with a chip groove for accommodating the chip on the side surface thereof facing the second wooden card base.
[0019] Optionally, the first wooden card base is provided with a conductive bridge groove for accommodating the conductive bridge on the side surface thereof facing the second wooden card base.
[0020] According to the technical content disclosed in the present application, the following beneficial effects are achieved:
[0021] The wood-based electronic tag provided by the utility model, by setting spiral grooves on the second wood-based card base and filling conductive medium to form an electronic coil, the coil structure is ingeniously accommodated in the wood-based material, effectively avoiding the problem that the outline mark ("ghost effect") is easily formed on the card surface when the traditional inlay lamination or the coil is directly made on the wood surface, so that the appearance flatness and natural aesthetic quality of the wood-based electronic tag are obviously improved; more importantly, the utility model innovatively designs a split type conductive bridge structure composed of an insulating lower bridge body and a conductive upper bridge body, the conductive bridge not only reliably spans the multiple turns of the spiral coil, the upper bridge body of the conductive bridge is protruded through the through hole of the lower bridge body, and the upper bridge body is respectively in stable electrical connection with the tail end of the coil and the second electrical contact (or the connecting path thereof) of the chip, so that the technical problem that the coil outer ring end is connected to the inner ring center area chip contact across the line on the single wood-based substrate plane is effectively solved, the reliability and insulation of the circuit connection are ensured; in addition, by presetting the chip groove and the conductive bridge groove on the first wood-based card base, the accurate positioning and stable installation of the chip and the conductive bridge are facilitated, the two wood-based card bases can be flatly and closely attached, the stability of the overall structure and the product yield are improved, finally the perfect fusion of the high-performance electronic functional component and the natural wood-based material is realized, and a wood-based electronic tag solution scheme with environmental protection characteristics, excellent performance and beautiful appearance is provided.
[0022] Other features of the utility model and its advantages will become clear from the following detailed description of exemplary embodiments of the utility model with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0023] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the utility model.
[0024] Figure 1 It is wood-based electronic tag structure diagram of the utility model.
[0025] Figure 2 It is wood-based electronic tag first structure exploded view of the utility model.
[0026] Figure 3 It is wood-based electronic tag second structure exploded view of the utility model.
[0027] Figure 4 It is wood-based electronic tag first wood-based card structure diagram of the utility model.
[0028] Figure 5 It is wood-based electronic tag conductive bridge structure diagram of the utility model.
[0029] Explanation of reference signs: 1, first wooden card base; 101, chip groove; 102, conductive bridge groove; 2, second wooden card base; 3, spiral groove; 4, chip; 5, upper bridge body; 501, protrusion; 6, lower bridge body; 601, through hole; 7, connecting groove. DETAILED DESCRIPTION
[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.
[0031] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the present application or its application or uses.
[0032] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, the techniques, methods, and apparatus should be considered as being part of the specification.
[0033] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.
[0034] Note that like reference numerals and letters indicate like items in the accompanying drawings and, as such, once an item is defined in one drawing, that item is not discussed further in subsequent drawings.
[0035] Reference will now be made to Figures 1 to 3 The present application provides a wooden base electronic tag, which comprises a first wooden card base 1 and a second wooden card base 2. The first wooden card base 1 and the second wooden card base 2 can be made of natural wood, plywood, medium density fiberboard (MDF), high density fiberboard (HDF), or bamboo and other wooden materials, and can have different thicknesses and surface treatments according to needs.
[0036] In this embodiment, a spiral groove 3 is provided on one surface (usually the inner surface facing the first wooden card base 1) of the second wooden card base 2. As shown in Figure 2 The spiral groove 3 spirals multiple turns from inside to outside, forming a planar spiral shape. The depth and width of the groove are designed according to the required coil inductance value and the characteristics of the conductive medium. The spiral groove 3 can be formed on the surface of the second wooden card base 2 by CNC engraving, laser etching, or other precision machining methods.
[0037] The helical groove 3 is filled with conductive medium, which forms an electronic coil after solidification. The conductive medium can be conductive silver paste, conductive carbon paste, conductive glue or other materials that can be solidified in the wood groove and form a good conductive path. The filling method can be screen printing, dispensing, injection and the like, to ensure that the conductive medium fills the groove and forms a continuous conductive circuit. After filling, the conductive medium is solidified according to the type, such as heating and drying or UV curing. The electronic coil formed as an antenna of the electronic tag is used for wireless communication and energy coupling with the reader.
[0038] The electronic tag further comprises a chip 4, such as an RFID chip, which has at least two electrical contacts (or pads, connection points), namely a first electrical contact and a second electrical contact. The chip 4 is arranged between the first wooden card base 1 and the second wooden card base 2. Preferably, in order to accurately position and protect the chip 4, a chip groove 101 matching the shape and thickness of the chip 4 can be formed on the side surface of the first wooden card base 1 facing the second wooden card base 2, and the chip 4 is embedded in the chip groove 101.
[0039] The first end of the electronic coil, i.e. the end point of the conductive medium formed at one end of the innermost coil of the helical groove 3, is electrically connected to the first electrical contact of the chip 4 through the conductive medium or other connection methods (such as conductive glue point connection).
[0040] In order to connect the tail end of the electronic coil, i.e. the end point of the conductive medium formed at one end of the outermost coil of the helical groove 3, to the second electrical contact of the chip 4, while avoiding short circuit with the inner coil, the utility model adopts a special conductive bridge.
[0041] As shown in Figures 2 to 5 The conductive bridge is arranged between the first wooden card base 1 and the second wooden card base 2, and its length direction crosses at least part of the coil turns of the helical groove 3 (in this embodiment, it crosses from the outer coil to the position close to the chip). The conductive bridge is composed of two parts: an insulating lower bridge body 6 and a conductive upper bridge body 5.
[0042] As shown in Figure 5 The lower bridge body 6 is made of insulating material, such as polyimide (PI), polyethylene terephthalate (PET), epoxy resin plate or other hard insulating plastic. The lower bridge body 6 is placed close to the surface of the second wooden card base 2, and its insulating property can effectively isolate the conductive part above it from the inner coil path below, preventing short circuit. Through holes 601 are formed at both ends of the lower bridge body 6.
[0043] The upper bridge 5 is made of conductive material, or has a conductive layer on its surface. For example, it can be cut from a copper-coated flexible circuit board (FPC), or molded from conductive plastic, or printed / deposited on an insulating substrate. The upper bridge 5 is placed close to the first wooden card substrate 1. Its one side (usually the side facing the second wooden card substrate 2) has two protrusions 501 extending downward at both ends. The positions of the two protrusions 501 correspond to the through holes 601 of the lower bridge 6. When assembled, the protrusions 501 pass through the through holes 601 of the lower bridge 6.
[0044] One of the protrusions 501 of the upper bridge 5 has its end in contact with the conductive medium filling the end of the spiral groove 3 and forms a reliable electrical connection. This can be achieved by using a small amount of conductive glue during assembly or relying on the pressure contact of the protrusion 501.
[0045] The other protrusion 501 of the upper bridge 5 needs to form an electrical connection with the second electrical contact of the chip 4. In one preferred embodiment of the present application, as shown in Figure 4 a connecting groove 7 is also provided on the second wooden card substrate 2. One end of the connecting groove 7 is close to the position of the second electrical contact of the chip 4, and the other end is close to the position of the "other protrusion 501" of the conductive bridge. The connecting groove 7 is also filled with conductive medium. In this way, the second electrical contact of the chip 4 is electrically connected to the other protrusion 501 of the upper bridge 5 through the conductive medium in the connecting groove 7. In this way, through the conductive bridge and the conductive medium in the connecting groove 7, a complete electrical connection path is formed from the end of the coil to the second electrical contact of the chip. In a more preferred embodiment, the connecting groove 7 is linear in shape, which is convenient for processing and conductive medium filling.
[0046] Preferably, in order to better accommodate the conductive bridge and enable the two card substrates to be flatly attached, a conductive bridge groove 102 can be provided on the side surface of the first wooden card substrate 1 facing the second wooden card substrate 2, corresponding to the position where the conductive bridge is placed. The shape and depth of the conductive bridge groove 102 match the overall shape of the conductive bridge.
[0047] Finally, the first wooden card substrate 1 with the chip 4, the conductive medium, and the conductive bridge placed, and the second wooden card substrate 2 are aligned and attached to each other, for example, using environmentally friendly adhesive for bonding, or through heat pressing, etc. However, it should be noted that if heat pressing is used, the heat pressing temperature should not be higher than the melting temperature of the conductive medium. After bonding, the internal components such as the electronic coil, chip 4, and conductive bridge are completely encapsulated between the two wooden card substrates, forming a complete and structurally stable wooden-based electronic tag. At this time, the first electrical contact of the chip 4 is connected to the first end of the coil, and the second electrical contact is connected to the end of the coil through the connecting groove 7 and the conductive bridge, forming a closed resonant circuit required for normal operation of the electronic tag.
[0048] The utility model discloses a wood-based electronic tag, which comprises a wood-based substrate, a chip, a coil and a bridge structure.
[0049] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims
1. A wood-based electronic tag, characterized in that, include: First wooden card base and second wooden card base; The second wooden card base is provided with a spiral groove that spirals multiple times from the inside out. The spiral groove is filled with a conductive medium to form an electronic coil. A chip having at least a first electrical contact and a second electrical contact, the chip being disposed between a first wooden card base and a second wooden card base; The first end of the electronic coil, i.e. the inner end, is electrically connected to the first electrical contact of the chip; A conductive bridge is disposed between the first wooden card base and the second wooden card base, and spans at least a portion of the number of coil turns in the spiral groove. The conductive bridge is used to form an electrical connection path between the tail end of the electronic coil, i.e. the outer coil end, and the second electrical contact of the chip. The conductive bridge includes an insulated lower bridge body and a conductive upper bridge body; the lower bridge body is located near the second wooden card base and has through holes at both ends; the upper bridge body is located near the first wooden card base and has protrusions extending downward into the through holes at both ends of one side. One of the protrusions of the upper bridge body is electrically connected to the conductive medium filling the tail end of the spiral groove. Another protrusion of the upper bridge body is connected to the second electrical contact of the chip via an electrical connection path; The first and second wooden card bases are bonded together to house the electronic coil, chip, and conductive bridge, forming a closed circuit composed of the chip and electronic coil.
2. The wood-based electronic tag according to claim 1, characterized in that, The second wooden card base is also provided with a connecting groove, which is filled with a conductive medium; another protrusion of the upper bridge body is electrically connected to the second electrical contact of the chip through the conductive medium filled in the connecting groove.
3. The wood-based electronic tag according to claim 2, characterized in that, The connecting groove is straight and located on the inner ring side of the electronic coil.
4. The wood-based electronic tag according to claim 1, characterized in that, The first wooden card base has a chip groove on one side of its surface facing the second wooden card base for accommodating the chip.
5. The wood-based electronic tag according to claim 1, characterized in that, The first wooden card base has a conductive bridge groove on the side surface facing the second wooden card base for accommodating the conductive bridge.