RFID tag telescopic nail
By designing the sliding structure of RFID tag telescopic nails and the improved RFID tag antenna, the safety hazards caused by the overhang protrusion of the locking nails are solved, and the security of use and reading performance is improved.
Patent Information
- Application Number
- CN202422023115.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The lock pins of the existing anti-theft labels are overhanged and protruded when in non-use states, which poses safety hazards and can easily lead to human touch and injury.
An RFID tag telescopic nail is designed, which allows the locking nail to be telescopic and retracted axially through the sliding structure. When not in use, the locking nail is retracted into the sliding structure. When in use, press the sliding structure to push the locking nail outward, and enhances the anti-interference ability by improving the antenna structure of the RFID tag.
It significantly improves safety, reduces the possibility of human touch injury, is easy to operate, and enhances the reading performance of RFID tags.
Smart Images
Figure CN223048607U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an anti-theft device for commodities, in particular to an RFID tag telescopic nail. Background Art
[0002] The anti-theft tag is an anti-theft device widely used in shopping malls and supermarkets, mainly including a nail cap and a clamp that is inserted and cooperated with the nail cap. Among them, the nail cap includes a cap and a locking nail fixed in the center of the cap and protruding in suspension. The clamp includes a housing with a lock core. When in use, the locking nail passes through the commodity and is inserted into the lock hole of the clamp, and the lock core clamps the locking nail to complete locking.
[0003] Since the locking nail in the nail cap also protrudes in suspension all the time in the non-use state, it has a certain danger and is easy to cause people to touch and get injured, so it needs to be further improved. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies in the above background art and provide an RFID tag telescopic nail, which should have the characteristics of convenient use and good safety.
[0005] The technical solution of the utility model is as follows:
[0006] An RFID tag telescopic nail includes a main shell, a locking nail, and an RFID tag; it is characterized in that: the locking nail is axially telescopically positioned at the center of the main shell through a sliding structure; the sliding structure includes three concentrically nested sliding caps, and when the sliding caps are pressed, the locking nail can protrude from the bottom surface of the main shell along the axial direction.
[0007] The sliding structure includes an outer sliding cap fixed to the main shell, a middle sliding cap slidably positioned in the inner cavity of the outer sliding cap, an inner sliding cap slidably positioned in the inner cavity of the middle sliding cap, and a spring for pushing the inner sliding cap; the locking nail is fixed in the inner cavity of the inner sliding cap; under the action of the spring, the sliding structure bounces upward and retracts the locking nail.
[0008] In the sliding structure, the outer sliding cap, the middle sliding cap, and the inner sliding cap are coaxially arranged, and the diameters of the outer sliding cap, the middle sliding cap, and the inner sliding cap gradually decrease.
[0009] In the sliding structure, a circumferential brim-shaped positioning edge protruding in the outer diameter direction is respectively made at the lower edges of the middle sliding cap and the inner sliding cap, and a circumferential stop edge protruding in the inner diameter direction to interfere with the foregoing positioning edge is respectively made at the upper edges of the outer sliding cap and the middle sliding cap.
[0010] An inner shell is fixed to the bottom surface of the main shell; the RFID tag is pressed and fixed between the main shell and the inner shell.
[0011] The outer sliding cap is integrated with the main shell; a bottom cover for limiting is provided at the bottom of the outer sliding cap, and the locking pin extends from the center of the bottom cover, and the bottom cover presses and fixes the inner shell.
[0012] The main shell is a paraboloid; the shapes of the inner shell and the RFID tag are suitable for the shape of the main shell.
[0013] The RFID tag includes an antenna and an RF chip; the antenna includes a PET layer and an aluminum foil layer; both the PET layer and the aluminum foil layer are in a horseshoe shape, and there is a certain distance between the edges of the aluminum foil layer and the PET layer; the aluminum foil layer includes an impedance part in the middle and radiation arms on both sides.
[0014] The impedance part includes a first lead wire that connects the two sides of the radiation arms at both ends and two second lead wires that are respectively connected to the two sides of the radiation arms; there is a certain gap between the two second lead wires; there is a crescent-shaped hollow area between the first lead wire and the second lead wires.
[0015] The beneficial effects of the present utility model are:
[0016] A sliding structure is added between the main shell and the locking pin in the present utility model. When not in use, the sliding structure pops up upward. Therefore, the locking pin retracts into the sliding structure instead of being exposed outside, which greatly reduces the possibility of people being touched and injured, and the safety performance is significantly improved. When in use, press the sliding structure to push the locking pin outwards, and an external clamp fixes the locking pin, and the operation is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is one of the three-dimensional structure schematic diagrams of the present utility model.
[0018] Figure 2 is the second three-dimensional structure schematic diagram of the present utility model.
[0019] Figure 3 is the front view structure schematic diagram of the present utility model.
[0020] Figure 4 is the cross-sectional structure schematic diagram of the present utility model (when not in use).
[0021] Figure 5 is the cross-sectional structure schematic diagram of the locking pin of the present utility model.
[0022] Figure 6 is the cross-sectional structure schematic diagram of the inner sliding cap of the present utility model.
[0023] Figure 7 is the cross-sectional structure schematic diagram of the middle sliding cap of the present utility model.
[0024] Figure 8 is the cross-sectional structure schematic diagram of the bottom cover of the present utility model.
[0025] Figure 9 It is a schematic cross-sectional structure diagram of the main shell of the present utility model.
[0026] Figure 10 It is a three-dimensional structure diagram of the RFID tag of the present utility model.
[0027] Figure 11 It is a three-dimensional structure diagram of the inner shell of the present utility model.
[0028] Figure 12 It is a schematic cross-sectional structure diagram (usage state) of the present utility model.
[0029] Figure 13 It is a schematic cross-sectional structure diagram of the embodiment.
[0030] Figure 14 It is a schematic diagram of the antenna of the present utility model.
[0031] Figure 15 It is a schematic diagram of the aluminum foil layer of the present utility model.
[0032] Figure 16 It is a schematic diagram of the antenna of the prior art.
[0033] Reference numerals:
[0034] Main shell 1, card slot 1.1, locking nail 2, tag 3, outer sliding cap 4, outer sliding cap edge 4.1, bottom edge 4.2, middle sliding cap 5, middle sliding cap positioning edge 5.1, middle sliding cap edge 5.2, inner sliding cap 6, inner sliding cap positioning edge 6.1, inner shell 7, card edge 7.1, deformation groove 7.2, bottom cover 8, groove 8.1, center hole 8.2, top cover 9, clamp 10, PET layer 11, aluminum foil layer 12, radiation arm 13, second lead 15. Detailed implementation manners
[0035] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0036] As Figure 1 shown, an RFID tag expansion nail includes a main shell 1, a locking nail 2, and an RFID tag 3.
[0037] A sliding structure is provided on the main shell, and the locking nail is axially telescopically positioned on the main shell through the sliding structure ( Figure 4 in the vertical direction).
[0038] The sliding structure includes a number of sliding caps, which are concentrically arranged and nested in sequence with sliding. The axes of these sliding caps are coaxial, and the diameters of the sliding caps change in a stepped manner from inside to outside (or from outside to inside). After two-by-two nesting in sequence, the sliding caps are slidably engaged with each other.
[0039] As shown in the figure, a total of 3 sliding caps are provided, including an outer sliding cap 4, a middle sliding cap 5, and an inner sliding cap 6. Among them: the locking pin is fixed at the center of the inner cavity of the inner sliding cap, and the inner sliding cap is slidably positioned in the inner cavity of the middle sliding cap, while the middle sliding cap is slidably positioned in the inner cavity of the outer sliding cap. The outer sliding cap is fixed at the center of the top of the main housing. The diameters of the outer sliding cap, the middle sliding cap, and the inner sliding cap gradually decrease.
[0040] As Figure 5 shown, the locking pin is inserted into the center of the inner sliding cap from top to bottom, and a top cover 9 is fixed on the top of the inner sliding cap to press and fix the cap of the locking pin.
[0041] To prevent the sliding caps from disengaging from each other during sliding, a rim-like positioning edge protruding in the outer diameter direction (middle sliding cap positioning edge 5.1 and inner sliding cap positioning edge 6.1) is respectively formed at the lower edges of the middle sliding cap and the inner sliding cap, and a retaining edge protruding in the inner diameter direction to generate movement interference with the aforementioned positioning edge (outer sliding cap retaining edge 4.1 and middle sliding cap retaining edge 5.2) is respectively formed at the upper edges of the outer sliding cap and the middle sliding cap.
[0042] The outer sliding cap is integrated with the main housing. To prevent the middle sliding cap and the inner sliding cap from falling off from the bottom of the main housing, a bottom cover 8 is additionally provided at the bottom of the outer sliding cap for limiting. The bottom cover is provided with an annular groove 8.1 and a central hole 8.2. The bottom edge 4.2 of the outer sliding cap extends downward from the bottom surface of the main housing by a certain length, and the bottom edge is also snapped into the groove to fix the bottom cover and the outer sliding cap. The locking pin extends out from the bottom surface of the main housing through the central hole.
[0043] To ensure that the locking pin can automatically retract into the sliding cap, a spring (omitted in the figure) is also sleeved on the locking pin, and the two ends of the spring respectively abut against the inner sliding cap and the bottom cover.
[0044] An inner housing 7 is fixed to the bottom surface of the main housing. A circular groove 1.1 is provided on the bottom surface of the main housing. The clamping edges 7.1 around the inner housing are embedded in the groove, and the bottom cover presses the inner ring of the inner housing. Therefore, the RFID tag is pressed and fixed between the main housing and the inner housing. A number of radially extending deformation grooves 7.2 are also provided on the inner housing.
[0045] The main housing is a paraboloid. The shapes of the inner housing and the RFID tag are suitable for the shape of the main housing.
[0046] As Figure 4 shown, when not in use, under the push of the spring, the middle sliding cap pops up from the top of the outer sliding cap, the inner sliding cap pops up from the top of the middle sliding cap, and the locking pin retracts into the sliding structure.
[0047] As Figure 12 and Figure 3 shown, when in use, place the present utility model and the clamp 10 on both sides of the commodity respectively and align them vertically. Press the inner sliding cap to compress the spring, and the locking pin extends downward. After passing through the commodity, the locking pin is inserted into the clamp and is firmly fixed by the lock core inside the clamp. Therefore, the locking pin remains in the extended state, making the present utility model and the clamp integrated and fixed on the commodity, completing the locking.
[0048] When unlocking, use the unlocking tool to approach the clamp. The lock core of the clamp automatically releases the locking pin, and the sliding structure pops up upward to retract the locking pin. The present utility model and the clamp are separated, completing the unlocking.
[0049] Since the clamp usually has an RF coil inside, it will cause great interference to the RFID tag and affect the reading performance of the RFID tag. Therefore, the present utility model also makes improvements to the RFID tag.
[0050] The RFID tag includes an antenna and an RF chip. The RF chip is omitted in the figure. As Figure 14 shown, the antenna includes a PET layer 11 and an aluminum foil layer 12. The aluminum foil layer is laminated on the PET layer and formed by etching.
[0051] Both the PET layer and the aluminum foil layer are in a horseshoe shape, and there is a certain distance between the edge of the aluminum foil layer and the edge of the PET layer (the width of the aluminum foil layer is slightly smaller than the width of the PET layer). This distance is formed by etching. The hollow area of this horseshoe shape is used to avoid the bottom edge of the outer sliding cap on the bottom surface of the main shell.
[0052] The aluminum foil layer includes an impedance part in the middle and radiation arms 13 on both sides. The impedance part includes a first lead 14 and two second leads 15. The first lead is arc-shaped and connects both sides of the radiation arms at the same time. The two second leads are respectively connected to both sides of the radiation arms, and the two second leads are arranged on the same axis. Therefore, a crescent-shaped hollow area (for adjusting impedance) is enclosed between the first lead and the second leads. The two second leads are used to connect the RF chip, and there is a certain gap between the two second leads. This hollow area and the gap are formed by etching.
[0053] Compared with the prior art( Figure 16 ), the coverage area of the aluminum foil layer of this antenna is relatively large( Figure 14 most of the areas on the left and right sides of the PET layer in are radiation arms), greatly increasing the radar cross-section, enhancing the backscattering ability, having better anti-interference ability, and being less affected by the outside in terms of impedance. Thus, it can effectively suppress the interference of the RF coil inside the clamp and keep the reading performance of the RFID tag stable.
[0054] Preferred embodiments of the present utility model are shown in the accompanying drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present utility model more thorough and comprehensive.
Claims
1. An RFID tag telescopic nail, comprising a main shell (1), a locking nail (2), and an RFID tag (3); characterized in that: The locking pin can be axially telescopically positioned at the center of the main shell through a sliding structure; the sliding structure includes three concentrically nested sliding caps, and when the sliding caps are pressed, the locking pin can protrude from the bottom surface of the main shell along the axial direction.
2. The RFID tag telescopic nail according to claim 1, characterized in that: The sliding structure comprises an outer sliding cap (4) fixed to the main shell, a middle sliding cap (5) slidably positioned in the inner cavity of the outer sliding cap, an inner sliding cap (6) slidably positioned in the inner cavity of the middle sliding cap, and a spring for pushing the inner sliding cap; the inner cavity of the inner sliding cap fixes the locking pin; under the action of the spring, the sliding structure bounces upward and retracts the locking pin.
3. The RFID tag telescopic nail according to claim 2, characterized in that: In the sliding structure, the outer sliding cap, the middle sliding cap and the inner sliding cap are coaxially arranged, and the diameters of the outer sliding cap, the middle sliding cap and the inner sliding cap are gradually reduced.
4. The RFID tag telescopic nail according to claim 3, characterized in that: In the sliding structure, the lower edges of the middle sliding cap and the inner sliding cap are respectively formed with a circle of brim-like positioning edges protruding toward the outer diameter direction, and the upper edges of the outer sliding cap and the middle sliding cap are respectively formed with a circle of retaining edges protruding toward the inner diameter direction to interfere with the aforementioned positioning edges.
5. The RFID tag telescopic nail according to claim 4, characterized in that: An inner shell (7) is fixed to the bottom surface of the main shell; the RFID tag is pressed and fixed between the main shell and the inner shell.
6. The RFID tag telescopic nail according to claim 5, characterized in that: The outer sliding cap is connected to the main shell as a whole; a bottom cover (8) for limiting position is provided at the bottom of the outer sliding cap, a locking pin extends from the center of the bottom cover, and the bottom cover presses and fixes the inner shell.
7. The RFID tag telescopic nail according to claim 6, characterized in that: The main shell is a parabola; the shapes of the inner shell and the RFID tag are consistent with the shape of the main shell.
8. The RFID tag telescopic nail according to claim 1 or 7, characterized in that: The RFID tag comprises an antenna and an RF chip; the antenna comprises a PET layer (11) and an aluminum foil layer (12); the PET layer and the aluminum foil layer are both horseshoe-shaped, and the edge of the aluminum foil layer maintains a certain distance from the edge of the PET layer; the aluminum foil layer comprises an impedance portion in the middle and radiation arms (13) on both sides.
9. The RFID tag telescopic nail according to claim 8, characterized in that: The impedance part comprises a first lead (14) with two ends connected to the radiation arms on both sides and two second leads (15) connected to the radiation arms on both sides respectively; a certain gap is maintained between the second leads; and a crescent-shaped hollow area is provided between the first lead and the second lead.