Card structure capable of reducing slipping probability

Abstract

The utility model discloses a card structure capable of reducing slip probability, which comprises a card body and an electrostatic friction coating covered on the surface of the card body. The movable claw mechanisms are embedded into four corners of the front and back surfaces of the card; the reset module is arranged on the inner side of the card body, the static friction coating and the design of specific thickness and roughness enable the card to generate stronger static electricity when the card rubs with clothes, friction force is increased, slipping is reduced, the movable hook claw mechanism actively hooks clothes fibers through static electricity driving, the connection stability is enhanced, and the card can be used for preventing clothes from falling off. The reset module ensures that the hook claw is automatically unlocked and reset when not needed, clothes are prevented from being damaged, meanwhile, the effectiveness of next use is ensured, the card structure comprehensively considers electrostatic adsorption and mechanical locking, and the stability and convenience of the card under various conditions are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of smart card technology, specifically a card structure that reduces the chance of slipping. Background Technology

[0002] In existing card management systems, the storage and retrieval of cards such as smart cards, membership cards, and access control cards is a crucial aspect. Traditional card storage devices often employ simple slots or card trays. While convenient, this design also reveals several problems. Especially in scenarios requiring frequent card retrieval, such as public transportation cards and employee access control cards, the lack of sufficient securing mechanisms in the slots or trays allows cards to easily slip out during storage due to vibration or improper handling. This not only inconveniences users but can also lead to card damage or loss, increasing management costs and user security risks.

[0003] To address the issue of cards slipping out, the industry has explored several solutions. For example, adding flexible clips within the card slot enhances card retention. However, this design often increases operational complexity, requiring users to exert extra force to overcome the clips' resistance when retrieving the card, thus impacting the user experience. Furthermore, some high-end card management systems employ magnetic or mechanical locking mechanisms to secure cards. While these solutions offer significant improvements in retention, their high cost and complex structure limit their widespread adoption. Summary of the Invention

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a card structure that reduces the probability of slipping, which can effectively solve the problem of card slippage and loss mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a card structure that reduces the probability of slippage, including a card body, an electrostatic friction coating, the electrostatic friction coating covering the surface of the card body; a movable hook mechanism, the movable hook mechanism being embedded in the four corners of the front and back sides of the card; and a reset module, the reset module being disposed inside the card body.

[0006] Furthermore, the movable hook mechanism includes a hook and a hook seat. The hook seat is disposed within the card body, and the hook is movably connected to the hook seat. The hook is provided with a ratchet that limits the opening angle of the hook. The inner ring of the ratchet is provided with a shaft connected to the hook seat. A blocking plate movably connected to the shaft on one side and a movable protrusion fixedly connected to the shaft are provided on the shaft. A track and a slider slidably connected to the track are provided below the hook seat. A first spring and a first dielectric elastomer film are respectively connected to both ends of the slider in the direction of movement. The other ends of the spring and the first dielectric elastomer film are respectively connected to the hook seat. A traction rope is fixedly connected to the upper part of the slider. The other end of the traction rope is connected to the lower part of the ratchet. A conductive brush sweeping towards the ratchet is provided on the shaft. A conductive brush sweeping towards the first dielectric elastomer film is fixedly connected to the hook seat above the first dielectric elastomer film. The conductive brush is connected to the conductive mesh inside the card.

[0007] Furthermore, the movable protrusion includes a second dielectric elastomer film, a second spring, and a spring seat. The spring seat is fixed on the shaft, the second spring is disposed inside the spring seat, and the second dielectric elastomer film covers the top of the second spring.

[0008] Furthermore, a flexible block is provided at the top of the second spring, and the flexible block is fixedly connected to the top of the second spring.

[0009] Furthermore, the reset module includes a touch area, on the back of which a wire is provided, and the touch area is electrically connected to the movable claw mechanism via the wire.

[0010] Furthermore, the electrostatic friction coating is a polytetrafluoroethylene coating or a silicone-doped carbon nanotube coating.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] Enhanced electrostatic adhesion: An electrostatic friction coating is applied to the card's surface via spraying or screen printing, with a thickness between 50-100 μm and a surface roughness Ra of 1-5 μm. This design aims to enhance the electrostatic adhesion between the card and clothing. When the card rubs against the clothing, the electrostatic friction coating generates static electricity, thereby increasing the card's stability on the garment. This electrostatic friction coating utilizes the principle of electrostatics to make the card adhere more tightly to the clothing, reducing the possibility of slipping off.

[0013] The movable hook mechanism enhances stability: The movable hook mechanism is embedded in the four corners of both sides of the card, extending via electrostatic drive to hook onto clothing fibers. The multi-point hook design further improves the stability of the connection between the card and the clothing, effectively preventing the card from slipping even during vigorous exercise or in strong winds.

[0014] The reset module facilitates reuse: located inside the card body, the reset module unlocks the hook and resets it. This design allows the card to be easily removed from clothing when needed, while ensuring the hook mechanism functions correctly for the next use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural view of the present invention;

[0016] Figure 2 This is a three-dimensional view of the movable hook mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the movable hook mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the movable protrusion structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the initial state structure of the movable protrusion of this utility model;

[0020] Figure 6 This is a schematic diagram of the electrostatic friction coating structure of this utility model.

[0021] Numbering on the map:

[0022] 1-Card body, 2-Modible hook mechanism, 3-Touch area, 4-Electrostatic friction coating, 5-Wire, 21-Hook, 22-Hook seat, 23-Shaft, 24-Slider, 25-Railway, 26-First spring, 27-First dielectric elastomer film, 28-Conductive brush, 29-Blocking plate, 30-Modible protrusion, 241-Traction rope, 301-Second dielectric elastomer film, 302-Second spring, 303-Spring seat, 304-Flexible block. Detailed Implementation

[0023] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0024] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. Example

[0025] like Figure 1-6 As shown, this utility model provides a card structure to reduce the probability of slippage, including a card body 1, and an electrostatic friction coating 4 that generates static electricity through friction with clothing. The electrostatic friction coating 4 covers the surface of the card body 1 and is applied by spraying or screen printing. The thickness of the electrostatic friction coating 4 is 50-100μm and the surface roughness Ra=1-5μm to enhance friction. An active hook mechanism 2 extends and hooks onto clothing fibers via electrostatic drive. The active hook mechanism 2 is embedded in the four corners of the front and back of the card. A reset module unlocks and resets the hooks, and the reset module is located inside the card body 1.

[0026] An electrostatic friction coating 4 is applied to the surface of the card body 1 by spraying or screen printing, and has a specific thickness and surface roughness. This allows the card to generate static electricity more effectively when rubbed against clothing, and the increased surface roughness also increases the friction between the card and clothing, thereby reducing the chance of the card slipping off.

[0027] The active hook mechanism 2 is embedded in the four corners of both sides of the card and extends by electrostatic drive to hook onto clothing fibers. This active hook design further enhances the connection between the card and the clothing, effectively maintaining the card's stability even in situations where the card could easily slip off, such as during activity or in strong winds.

[0028] The reset module is located inside the card body 1 and is used to unlock and reset the hook. When the card no longer needs to hook onto clothing, for example, when the user takes the card out of their pocket, the active hook mechanism 2 loses its locking ability and automatically retracts, avoiding damage or inconvenience to the clothing. At the same time, the automatic reset function also ensures that the card can effectively hook onto clothing again the next time it is used.

[0029] See Figure 2 and Figure 3The movable hook mechanism 2 includes a hook 21 and a hook seat 22. The hook seat 22 is disposed inside the card body 1. The hook 21 is movably connected to the hook seat 22. The hook 21 is provided with a ratchet that limits the opening angle of the hook 21. The inner ring of the ratchet is provided with a shaft 23 connected to the hook seat 22. A blocking plate 29 is movably connected to the shaft 23 on one side, and a movable protrusion 30 is fixedly connected to the shaft 23. The movable protrusion 30 pushes up the blocking plate 29 to lock the ratchet, thereby limiting the opening angle of the hook 21. A track 25 and a slider 24 slidably connected to the track 25 are provided below the hook seat 22. The two ends of the slider 24 in the direction of movement are respectively connected to a first spring 26 and a first dielectric elastomer film 27. The other end of the spring and the first dielectric elastomer film 27 are respectively connected to the hook seat 22. The upper part of the slider 24 is fixedly connected to the traction rope 241, which is made of ultra-high molecular weight polyethylene fiber. The other end of the traction rope 241 is connected to the lower part of the ratchet. The slider 24 moves forward to drive the hook 21 to open the angle. The slider 24 moves forward to drive the hook 21 to retract. The shaft 23 is provided with a conductive brush 28 that sweeps towards the ratchet. The upper part of the first dielectric elastomer film 27 is fixedly connected to the hook seat 22 with a conductive brush 28 that sweeps towards the first dielectric elastomer film 27. The conductive brush 28 is connected to the conductive mesh inside the card. The conductive brush 28 is used for electrostatic conduction inside the movable hook mechanism 2.

[0030] The hook 21 is movably connected to the hook base 22 and can rotate relative to the hook base 22 to realize the hook claw function for hooking clothing fibers; the hook base 22 serves as the support structure for the hook 21 and is fixed inside the card body 1 to ensure that the hook 21 remains stable when it extends and retracts.

[0031] A ratchet is mounted on shaft 23 to limit the opening angle of hook 21. The ratchet teeth prevent hook 21 from opening on its own without external force. Shaft 23 serves as the connecting component between the ratchet, the stop plate 29, and the movable protrusion 30, ensuring the stability and reliability of the entire mechanism.

[0032] The blocking plate 29 is movably connected to the shaft 23 on one side. It can be pushed up by the movable protrusion 30, and the blocking plate 29 locks the ratchet, thereby limiting the opening angle of the hook 21. This ensures that the hook 21 maintains a stable posture when extended. The movable protrusion 30 is fixedly connected to the shaft 23 and is pushed up by static electricity, realizing the locking and unlocking function of the ratchet.

[0033] The track 25 is positioned below the hook 22, providing a sliding path for the slider 24. The slider 24 is slidably connected to the track 25, enabling it to move linearly along the track 25. The first spring 26 and the first dielectric elastomer film 27 are respectively connected to both ends of the slider 24, providing restoring force and driving force for the slider 24. When the dielectric elastomer film is subjected to static electricity, it extends, allowing the spring to pull the slider 24 to move; when the static electricity disappears, the dielectric elastomer film pulls the slider 24 back to its original position.

[0034] The movement of slider 24 is connected to ratchet via traction rope 241, thereby enabling control of opening and retracting hook 21.

[0035] Conductive brushes 28 are disposed on the shaft 23 and above the first dielectric elastomer film 27 for electrostatic conduction within the movable claw mechanism 2. They are connected to the conductive mesh inside the card, ensuring that static electricity can be smoothly transferred to various components. The design of the conductive brushes 28 not only facilitates the transfer and distribution of static electricity but also, to a certain extent, prevents discharge caused by static electricity accumulation, thereby protecting the electronic components inside the mechanism.

[0036] See Figure 4 and Figure 5 The movable protrusion 30 includes a second dielectric elastomer film 301, a second spring 302, and a spring seat 303. The spring seat 303 is fixed on the shaft 23. The second spring 302 is disposed inside the spring seat 303. The second dielectric elastomer film 301 covers the top of the second spring 302. The second dielectric elastomer film 301 is affected by the static electricity generated by the electrostatic friction coating 4 on the card surface. When the second dielectric elastomer film 301 is not affected by static electricity, it covers the second spring 302 and the second spring 302 is compressed. When the second dielectric elastomer film 301 is affected by static electricity, the second dielectric elastomer film 301 extends, and the compressed second spring 302 is released and protrudes upward, pushing up the blocking piece 29 and engaging the ratchet, thus completing the action of limiting the opening angle of the hook 21.

[0037] The second dielectric elastomer film 301 covers the top of the second spring 302 and is affected by the electrostatic discharge generated by the electrostatic friction coating 4 on the card surface. When the second dielectric elastomer film 301 is not affected by electrostatic discharge, it remains in its original shape and covers the second spring 302, causing the second spring 302 to be in a compressed state. When the second dielectric elastomer film 301 is affected by electrostatic discharge, it deforms and stretches. This stretching causes the originally compressed second spring 302 to be released, thereby generating an upward bulging force.

[0038] The second spring 302 is the main component that provides the convex force. It is disposed in the spring seat 303 and releases its stored energy through the deformation of the second dielectric elastomer film 301. The spring seat 303 serves as the support structure for the second spring 302 and is fixed on the shaft 23, ensuring that the second spring 302 remains stable during deformation and energy release.

[0039] When the card rubs against the clothing and generates static electricity, the static electricity is transferred to the second dielectric elastomer film 301 through the conductive mesh inside the card. The second dielectric elastomer film 301 affected by the static electricity will deform and stretch, causing the second spring 302 to release energy and generate an upward protrusion force. This protrusion force will push the movable protrusion block 30 to move upward and push up the blocking plate 29 to lock it into the ratchet. The ratchet is then locked, thereby limiting the opening angle of the hook 21.

[0040] See Figure 4 and Figure 5 A flexible block 304 is provided on the top of the second spring 302, and the flexible block 304 is fixedly connected to the top of the second spring 302.

[0041] The flexible block 304 serves as a connecting component between the second spring 302 and the second dielectric elastomer film 301, effectively absorbing and dispersing the impact force from the second spring 302. When the second spring 302 releases energy, the flexible block 304 can slow down the speed and force of its top protrusion, thereby avoiding excessive pressure or damage to the second dielectric elastomer film 301.

[0042] See Figure 1 , Figure 2 and Figure 3 The reset module includes a touch area 3, with a wire 5 on the back of the touch area 3. The touch area 3 is electrically connected to the movable hook mechanism 2 through the wire 5. When the touch area 3 is touched by hand, the static electricity of the card is released, thereby restoring the dielectric elastomer film. The first dielectric elastomer film 27 and the second dielectric elastomer film 301 retract, the movable protrusion 30 retracts, the ratchet is released from its restriction, and the slider 24 is pulled out of its initial position due to the reset of the first dielectric elastomer film 27. The hook 21 retracts into the card.

[0043] Touch area 3 is the interface for user interaction with the card; it is a conductive metal sheet. When the user needs to reset the card, they simply touch this area. A wire 5 on the back of touch area 3 ensures its electrical connection to the movable claw mechanism 2. This connection allows static electricity to be transferred through touch area 3 to the dielectric elastomer film in the movable claw mechanism 2.

[0044] When a user touches the touch area 3, the static electricity from the human body interacts with the electrostatic friction coating 4 on the card surface, thereby releasing the static electricity accumulated on the card. This release of static electricity causes the dielectric elastomer film (including the first dielectric elastomer film 27 and the second dielectric elastomer film 301) to return to its original state. This is because the deformation of the dielectric elastomer film is caused by static electricity; when the static electricity disappears, the film naturally retracts.

[0045] As the second dielectric elastomer film 301 retracts, the movable protrusion 30 also retracts, thereby releasing the ratchet from its restraint. This means that the ratchet no longer prevents the hook 21 from rotating. At the same time, the retraction of the first dielectric elastomer film 27, through the action of the slider 24 and the traction rope 241, also causes the hook 21 to retract into the card.

[0046] The resetting of the first dielectric elastomer film 27 not only affects the retraction of the hook 21, but also affects the resetting of the entire movable claw mechanism 2 through the slider 24 connected to it. When the first dielectric elastomer film 27 retracts, it pulls the slider 24 back to its initial position. This initial position is the position where the slider 24 on the track 25 can keep the movable claw mechanism 2 stable and does not affect the normal use of the card.

[0047] Among them, the electrostatic friction coating 4 is a polytetrafluoroethylene coating or a silicone-doped carbon nanotube coating.

[0048] When the card rubs against clothing or other objects, the PTFE coating can effectively generate and accumulate static electricity.

[0049] Silicone itself has certain triboelectric properties, but doping with carbon nanotubes can significantly improve the efficiency of static electricity generation and accumulation. Carbon nanotubes have excellent conductivity, which can promote the transfer and accumulation of static electricity in the coating, enabling the coating to store static electricity more effectively.

[0050] During use, dielectric elastomer films exhibit in-plane elongation and thickness shrinkage. The deformation mechanism is as follows: the dielectric elastomer is driven by Maxwell stress under an electric field.

[0051] Electric field direction: applied perpendicularly to the upper and lower surfaces of the thin film.

[0052] Stress distribution:

[0053] The electrostatic attraction generated by the electric field squeezes the film, causing it to shrink in the thickness direction;

[0054] The material volume is approximately incompressible, and the lateral compensation is elongation in the in-plane direction.

[0055] Typical deformation variables:

[0056] Thickness shrinkage rate: 30%-80%, such as a 10μm film compressed to 20-70μm;

[0057] In-plane elongation: 50%-500%, depending on pre-stretching and material properties.

[0058] In the description of this utility model, it should be understood that the terms "middle", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0059] In this invention, unless otherwise expressly specified and limited, the first feature "on" the second feature may be in direct contact with the first feature, or indirect contact with the first feature through an intermediate medium. "A plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] The above description is merely illustrative of the embodiments of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model without creative labor should be included within the protection scope of this utility model.

Claims

1. A card structure to reduce the probability of slippage, comprising a card body, characterized in that, It also includes an electrostatic friction coating that covers the surface of the card body; a movable claw mechanism that is embedded in the four corners of the front and back of the card; and a reset module that is located inside the card body.

2. The card structure for reducing the probability of slippage according to claim 1, characterized in that: The movable hook mechanism includes a hook and a hook seat. The hook seat is disposed within the card body. The hook is movably connected to the hook seat. The hook is provided with a ratchet that limits the opening angle of the hook. The inner ring of the ratchet is provided with a shaft connected to the hook seat. A blocking plate movably connected to the shaft on one side and a movable protrusion fixedly connected to the shaft are provided on the shaft. A track and a slider slidably connected to the track are provided below the hook seat. A first spring and a first dielectric elastomer film are respectively connected to the two ends of the slider in the direction of movement. The other ends of the spring and the first dielectric elastomer film are respectively connected to the hook seat. A traction rope is fixedly connected to the upper part of the slider. The other end of the traction rope is connected to the lower part of the ratchet. A conductive brush sweeping towards the ratchet is provided on the shaft. A conductive brush sweeping towards the first dielectric elastomer film is fixedly connected to the hook seat above the first dielectric elastomer film. The conductive brush is connected to the conductive mesh inside the card.

3. The card structure for reducing the probability of slippage according to claim 2, characterized in that: The movable protrusion includes a second dielectric elastomer film, a second spring, and a spring seat. The spring seat is fixed on the shaft, the second spring is disposed inside the spring seat, and the second dielectric elastomer film covers the top of the second spring.

4. The card structure for reducing the probability of slippage according to claim 3, characterized in that: A flexible block is provided at the top of the second spring, and the flexible block is fixedly connected to the top of the second spring.

5. The card structure for reducing the probability of slippage according to claim 2, characterized in that: The reset module includes a touch area, and a wire is provided on the back of the touch area. The touch area is electrically connected to the movable claw mechanism through the wire.

6. The card structure for reducing the probability of slippage according to claim 1, characterized in that: The electrostatic friction coating is a polytetrafluoroethylene coating or a silicone-doped carbon nanotube coating.

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