Magnetic ring and electronic device protective shell

Abstract

The utility model discloses a kind of magnetic attraction ring and electronic equipment protective shell, and magnetic attraction ring includes viscose ring;Magnetic ring, with viscose ring is bonded;Metal ring, with the end surface of magnetic ring far from viscose ring is bonded;Protective ring, with the end surface of metal ring far from magnetic ring is bonded.Utilize the high magnetic guide characteristic of metal ring, form magnetic flux closed loop, significantly reduce magnetic resistance, avoid magnetic force line direct penetration electronic equipment, while metal ring will magnetic field line be restrained in its own interior, reduce the magnetization of ferromagnetic material in electronic equipment interior, to inhibit demagnetization field generation, it can reduce the magnetic field interference between magnetic ring and electronic equipment, thereby play the role of long-term keeping the magnetic force of magnetic ring not attenuation and enhancing magnetic force.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic device accessories, and in particular to a magnetic ring and a protective case for electronic devices. Background Technology

[0002] A magnetic ring is installed on the protective case of the electronic device to precisely align with the magnetic charging area on the back of the phone (such as MagSafe on the iPhone and the magnetic module on some Android models) to form a stable magnetic connection.

[0003] In some related technologies, such as the patent with patent number CN117319534A, an electronic device protective case is disclosed, which includes a decorative layer and a functional layer that are sequentially attached from the outside to the inside. The functional layer includes at least one second sheet and a magnetic absorbing element. The second sheet has a mounting hole, and the magnetic absorbing element is embedded in the mounting hole. The thickness of the magnetic absorbing element matches the depth of the mounting hole.

[0004] The above solution has a technical problem: when the magnetic component is magnetically attached to the mobile phone and the contact time between the two is relatively long, a demagnetizing field is easily generated, which will cause magnetic interference to the electronic device and thus weaken the magnetic force. Utility Model Content

[0005] In order to overcome the shortcomings of existing technical solutions, this utility model provides a magnetic ring and a protective shell for electronic devices.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] Firstly, this solution provides a magnetic chuck, the magnetic chuck comprising:

[0008] Adhesive rings;

[0009] A magnetic ring, wherein the magnetic ring is bonded to the adhesive ring;

[0010] A metal ring is bonded to the end face of the magnetic ring away from the adhesive ring;

[0011] A protective ring is attached to the end face of the metal ring away from the magnetic ring.

[0012] As a preferred technical solution of this utility model, the magnetic ring includes multiple magnetic blocks, and each magnetic block is distributed at intervals along the circumference.

[0013] As a preferred technical solution of this utility model, the metal ring includes multiple metal blocks, each of which is distributed circumferentially and is bonded to each of the magnetic blocks in a one-to-one correspondence.

[0014] As a preferred technical solution of this utility model, the magnetic ring further includes multiple first adhesive sheets, the first adhesive surface of each first adhesive sheet being bonded to each of the magnetic blocks in a one-to-one correspondence, and the second adhesive surface of each first adhesive sheet being bonded to each of the metal blocks in a one-to-one correspondence.

[0015] As a preferred technical solution of this utility model, the magnetic ring further includes multiple second adhesive sheets, the first adhesive surface of each second adhesive sheet is respectively bonded to the end face of each metal block away from the magnetic ring, and the second adhesive surface of each second adhesive sheet is bonded to the protective ring.

[0016] As a preferred technical solution of this utility model, the adhesive ring has multiple through-holes.

[0017] As a preferred technical solution of this utility model, the metal ring is one of an iron ring, a silicon steel ring, or a stainless steel ring.

[0018] Secondly, this solution provides a protective case for an electronic device, the protective case comprising:

[0019] Protective shell body;

[0020] The magnetic ring described in any of the first aspects above is disposed on the protective shell body.

[0021] As a preferred technical solution of this utility model, the protective shell body is recessed with an annular positioning cavity, the magnetic ring is disposed in the annular positioning cavity, and the outer side of the magnetic ring is interference-fitted with the cavity wall of the annular positioning cavity.

[0022] As a preferred technical solution of this utility model, the protective shell body is recessed with a positioning cavity;

[0023] The protective shell for the electronic device also includes a tail magnet and a tail magnet protective sheet bonded together, both of which are disposed within the positioning cavity.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] By bonding the magnetic ring to the adhesive ring, which is then fixed to the protective casing of the electronic device, the stability of the magnetic ring is ensured, preventing displacement or loosening due to frequent use and thus reducing magnetic loss. Utilizing the high permeability of the metal ring, a closed magnetic flux loop is formed, significantly reducing magnetic resistance and preventing magnetic lines of force from directly penetrating the electronic device. Simultaneously, the metal ring confines the magnetic field lines within itself, reducing the magnetization of ferromagnetic materials inside the electronic device and suppressing demagnetization. This reduces magnetic field interference between the magnetic ring and the electronic device, thereby maintaining and enhancing the magnetic force of the magnetic ring over a long period. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural diagram of the magnetic ring and the electronic device protective case according to an embodiment of the present invention.

[0028] Figure 2 This is a structural diagram of the magnetic ring according to an embodiment of the present invention.

[0029] Figure 3 This is a structural diagram of the magnetic ring according to an embodiment of the present invention.

[0030] Figure 4 This is a structural diagram of the metal ring according to an embodiment of the present invention.

[0031] Figure 5 This is a structural diagram of the adhesive ring according to an embodiment of the present invention.

[0032] Figure 6 This is an exploded view of the magnetic ring and the electronic device protective shell according to an embodiment of the present invention.

[0033] Figure 7 This is a structural diagram of the touch key according to an embodiment of the present invention.

[0034] Figure 8 This is a cross-sectional view of the touch key structure according to an embodiment of the present invention.

[0035] Numbers in the diagram

[0036] 1. Magnetic ring; 11. Adhesive ring; 111. Through opening; 12. Magnetic ring; 121. Magnetic block; 13. Metal ring; 131. Metal block; 14. Protective ring; 15. First adhesive sheet; 16. Second adhesive sheet;

[0037] 2. Protective casing for electronic equipment; 21. Positioning cavity; 22. Tail magnet; 23. Tail magnet protective plate; 24. Annular positioning cavity;

[0038] 3. Touch key; 31. Touch key body; 32. Conductor; 33. Raised ring. Detailed Implementation

[0039] To make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0040] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0041] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0042] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application 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 application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0045] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0046] In order to solve the technical problem that the magnetic field generated between the magnetic component and the mobile phone after a long period of magnetic attraction can interfere with the mobile phone when transmitting or receiving signals, this utility model provides a magnetic ring 1 and an electronic device protective case 2.

[0047] The following describes in detail the specific structure of a magnetic ring 1 provided by this utility model embodiment. As shown in Figures 1-5, the specific structure of the magnetic ring 1 includes an adhesive ring 11, a magnetic ring 12, a metal ring 13, and a protective ring 14.

[0048] The adhesive ring 11 adheres firmly to the inner surface of the phone case, maintaining good adhesion even after repeated use and a certain degree of friction. The adhesive ring 11 has a degree of flexibility, adapting to the bending and deformation of the phone case without cracking or falling off due to changes in the case's shape. Furthermore, the adhesive ring 11 maintains its long-term adhesive performance in everyday environments, such as with temperature and humidity changes, and will not easily age or fail.

[0049] It is understood that the adhesive ring 11 of this utility model embodiment uses a high-performance pressure-sensitive adhesive (PSA) material. The adhesive ring 11 made of such material has good adhesion, durability and flexibility, and can maintain stable adhesion performance under different temperature and humidity conditions.

[0050] according to Figure 2 As shown, the magnetic ring 12 is bonded to the adhesive ring 11.

[0051] Specifically, the magnetic field distribution of the magnetic ring 12 is the core of its operation. Therefore, the magnetic ring 12 is designed as a ring. This shape helps to concentrate the magnetic field, generating a strong magnetic field in the central region of the magnetic ring 12, while the magnetic field gradually weakens at the outer edge of the magnetic ring 12. Specifically, the magnetic field of the ring magnetic ring 12 is most concentrated in the central region of the ring. This arrangement allows the magnetic ring 12 to precisely align with external magnetic devices, such as the magnetic components of a wireless charger, thereby achieving stable adsorption. The magnetic field direction of the magnetic ring 12 is typically along the axial direction of the ring (i.e., from the inside to the outside of the ring). This magnetic field arrangement allows the magnetic ring 12 to generate a strong attractive force with the magnetic components of external devices.

[0052] The adhesive ring 11 is bonded to the magnetic ring 12, and the adhesive ring 11 is firmly fixed inside the protective shell. This fixing method ensures that the magnetic ring 12 will not be displaced due to external force during use, thereby ensuring the stable adsorption of the magnetic ring 12 to the external device.

[0053] according to Figure 2 As shown, the metal ring 13 is bonded to the end face of the magnetic ring 1 away from the adhesive ring 11.

[0054] Specifically, since most magnetic rings 12 are made of magnetic materials with high coercivity (such as neodymium iron boron), magnetic rings 12 made of such materials are not easily demagnetized under external magnetic field interference. However, prolonged use and complex electromagnetic environments may still have some impact on the magnetic ring 12. Therefore, by setting a metal ring 13 and bonding it to the magnetic ring 1, the metal ring 13 can block part of the magnetic field when an external magnetic field (such as the magnetic field generated by a mobile phone signal transmitter) approaches the magnetic ring 12, thereby reducing the interference of the external magnetic field on the magnetic ring 12. The metal ring 13 plays a certain shielding role, which helps to maintain the magnetic force of the magnetic ring 12 and also prevents it from demagnetizing due to the long-term effect of the external magnetic field. Specifically, by utilizing the high permeability of the metal ring 13, a closed magnetic flux loop is formed, which significantly reduces magnetic resistance and prevents magnetic lines of force from directly penetrating the electronic device. At the same time, the metal ring 13 confines the magnetic field lines to its own interior, reducing the magnetization of ferromagnetic materials inside the electronic device, thereby suppressing the generation of demagnetizing fields and reducing magnetic field interference between the magnetic ring 12 and the electronic device. This helps to maintain the magnetic force of the magnetic ring 12 without attenuation and enhance its magnetic force over a long period of time.

[0055] Because the metal ring acts as a magnetic shield, it redistributes the magnetic field generated by the magnetic ring, concentrating it more on the metal ring 13 rather than directly acting on the electronic device. This reduces direct magnetic interaction between the magnetic ring and the electronic device, thus mitigating the impact of the demagnetizing field. For example, when the magnetic field of the magnetic ring passes through the metal ring, the metal ring enhances the magnetic field's conduction efficiency, concentrating the magnetic force more on the contact surface between the metal and magnetic rings. This compensates for the weakening of the magnetic force caused by the demagnetizing field, maintaining the magnetic stability of the magnetic ring.

[0056] For example, because the magnetic ring exists alone, it generates a demagnetizing field, which is a weakening effect of its own magnetic field on the magnetization. Therefore, the north pole of the magnetic ring will partially "cancel" the strength of its south pole in the air. In this embodiment of the invention, a metal ring is used to absorb or cancel part of the demagnetizing field, so that the net magnetization of the magnetic ring is higher. In this way, the magnetic field on the side of the magnetic ring facing the wireless charger (south pole) is enhanced, which leads to an increase in the attraction between the magnetic ring and the wireless charger.

[0057] It should be noted that since the permeability of ferromagnetic materials (such as iron rings) is usually hundreds or even thousands of times higher than that of air, magnetic field efficiency can be significantly improved.

[0058] Furthermore, the metal ring 13 is made of a highly conductive metal material, such as an iron ring, a silicon steel ring, or a stainless steel ring; the specific type is not limited here. When an external magnetic field (such as the magnetic field generated by a mobile phone signal transmitter) passes through this type of metal ring 13, eddy currents are generated in the metal ring 13. These eddy currents are used to cancel out part of the external magnetic field, thereby reducing the interference of the magnetic field on the mobile phone signal. The metal ring 13 increases the path length for the magnetic field to propagate, causing the magnetic field to gradually attenuate as it passes through the metal ring 13. This arrangement reduces the impact of the magnetic field on the transmission and reception of mobile phone signals and also helps to optimize the magnetic field distribution of the magnetic ring 12, so that the magnetic field is mainly concentrated in the central area of ​​the magnetic ring 12, reducing the diffusion of the magnetic field around the back panel of the mobile phone, thus reducing the interference of the magnetic field on the mobile phone signal.

[0059] according to Figure 2 As shown, the protective ring 14 is bonded to the end face of the metal ring 13 away from the magnetic ring 1.

[0060] Specifically, the protective ring 14 separates the magnetic ring 12 from the back panel of the phone, avoiding direct friction between them. This physical isolation reduces wear on the surface of the magnetic ring 12, thus extending its lifespan. The protective ring 14 has good flexibility, providing cushioning when the phone is placed in or removed from the case, reducing mechanical stress caused by frequent use and further protecting the magnetic ring 12. Furthermore, the smooth surface of the protective ring 14 reduces scratches and wear on the back panel, extending its lifespan and maintaining the phone's aesthetic integrity.

[0061] Understandably, the protective ring 14 is made of polyester film material. The protective ring 14 made of this material has a certain electromagnetic shielding performance, which can effectively block the diffusion of part of the magnetic field, so that the magnetic field is hindered in the propagation process, thereby reducing the diffusion of the magnetic field around the back panel of the mobile phone.

[0062] according to Figure 3 As shown, in some specific embodiments, the magnetic ring 12 includes multiple magnetic blocks 121, which are distributed at intervals along the circumference.

[0063] Specifically, multiple magnetic blocks 121 are evenly distributed circumferentially, making the magnetic field more uniform around the ring. This reduces local concentration of the magnetic field and avoids problems such as local overheating or mechanical stress concentration caused by excessively strong magnetic fields. This uniform distribution of magnetic blocks 121 ensures that the magnetic ring 1 and external magnetic devices, such as wireless chargers, have consistent attraction forces in all directions, thus improving the stability and reliability of the attraction. The magnetic field is mainly concentrated in the area of ​​the magnetic blocks 121, reducing the diffusion of the magnetic field in unnecessary areas and improving magnetic attraction efficiency.

[0064] In addition, the arrangement of multiple magnetic blocks 121 allows the stress of the magnetic ring 12 to be distributed to each magnetic block 121 when subjected to external force, thereby reducing the risk of damage to a single magnetic block 121 due to excessive local stress, and also better resisting the impact of external force.

[0065] according to Figure 4 As shown, in a further embodiment, the metal ring 13 includes a plurality of metal blocks 131, which are distributed circumferentially; each metal block 131 is bonded to each magnetic block 121 in a one-to-one correspondence.

[0066] Specifically, the arrangement of multiple metal blocks 131 allows the magnetic ring 1 to distribute stress across each metal block 131 when subjected to external force. This reduces the risk of damage to a single magnetic block 121 due to excessive localized stress, thereby extending the service life of the magnetic ring 12. The metal blocks 131 provide additional mechanical support to the magnetic ring 1, making it more stable during use and preventing deformation or damage caused by external forces (such as collisions or compression).

[0067] It should be noted that each metal block 131 serves to concentrate the magnetic field mainly in the area of ​​the magnetic block 121, reducing the diffusion of the magnetic field in unnecessary areas. This not only improves the magnetic attraction efficiency but also significantly reduces the magnetic resistance, preventing magnetic lines of force from directly penetrating the electronic device. At the same time, each metal block 131 confines the magnetic field lines within itself, reducing the magnetization of ferromagnetic materials inside the electronic device, thereby suppressing the generation of demagnetizing fields and thus maintaining the magnetic force of the magnetic ring without decay over a long period of time.

[0068] according to Figure 2 As shown, in some specific embodiments, the magnetic ring 1 further includes multiple first adhesive sheets 15, the first adhesive surface of each first adhesive sheet 15 is bonded to each magnetic block 121 in a one-to-one correspondence, and the second adhesive surface of each first adhesive sheet 15 is bonded to each metal block 131 in a one-to-one correspondence.

[0069] Specifically, each first adhesive sheet 15 has two adhesive surfaces (a first adhesive surface and a second adhesive surface). The first adhesive surface is bonded to the magnetic block 121, and the second adhesive surface is bonded to the metal block 131. This double-sided bonding of the first adhesive sheets 15 ensures a secure connection between the magnetic block 121 and the metal block 131, reducing loosening or displacement caused by external forces. The multiple first adhesive sheets 15 are evenly distributed circumferentially, making the connection between the magnetic block 121 and the metal block 131 more uniform and stable. This reduces localized stress concentration and further enhances the overall structural stability of the magnetic ring 1.

[0070] It should be noted that the first adhesive sheet 15, through its flexibility and adhesive properties, can effectively disperse external forces. When the magnetic ring 1 is subjected to external forces, the stress can be evenly distributed to each magnetic block 121 and metal block 131 through the adhesive sheet, reducing the risk of damage to individual components due to excessive local stress, reducing damage to magnetic blocks 121 and metal blocks 131 caused by mechanical impact during use, and extending the service life of the magnetic ring 1.

[0071] according to Figure 2 As shown, in a further embodiment, the magnetic ring 1 also includes multiple second adhesive sheets 16, the first adhesive surface of each second adhesive sheet 16 is respectively bonded to the end face of each metal block 131 away from the magnetic ring 12, and the second adhesive surface of each second adhesive sheet 16 is bonded to the protective ring 14.

[0072] Specifically, each second adhesive sheet 16 has two adhesive surfaces. The first adhesive surface of the second adhesive sheet 16 is bonded to the end face of the metal block 131 away from the magnetic block 121, and the second adhesive surface of the second adhesive sheet 16 is bonded to the protective ring 14. This arrangement ensures a firm connection between the metal block 131 and the protective ring 14, reducing loosening or displacement caused by external forces. Multiple second adhesive sheets 16 are evenly distributed circumferentially, making the connection between the metal block 131 and the protective ring 14 more uniform and stable, thereby reducing local stress concentration and further enhancing the overall structural stability of the magnetic ring 1.

[0073] In addition, the second adhesive sheet 16 not only serves as a connector but also provides cushioning and protection, reducing mechanical damage and wear. Specifically, the second adhesive sheet 16 has good flexibility, which can provide a certain buffer when the magnetic ring 1 is subjected to external impact, thereby reducing the direct impact of mechanical stress on the metal block 131 and the protective ring 14, extending the service life of the entire magnetic ring 1. Moreover, the second adhesive sheet 16 also has flexibility, which reduces the direct friction between the metal block 131 and the protective ring 14, further protecting the surfaces of the metal block 131 and the protective ring 14 and preventing wear caused by long-term use.

[0074] It is understood that the first adhesive sheet 15 and the second adhesive sheet 16 in this embodiment of the present invention are both metal adhesives.

[0075] In some specific embodiments, the metal ring 13 is one of an iron ring, a silicon steel ring, or a stainless steel ring.

[0076] For example, if the metal ring 13 is made of iron, iron is a material with high magnetic permeability, which can effectively guide the magnetic field. When the magnetic field encounters the iron ring, the iron ring will guide the magnetic field into its interior, thereby reducing the diffusion of the magnetic field to the outside. This can significantly reduce the interference of the magnetic field generated by the magnetic ring 12 on the mobile phone signal. Moreover, the iron ring exhibits good magnetic permeability when the magnetic field strength is low, but magnetic saturation will occur when the magnetic field strength is high. The shielding effect may decrease under high magnetic field strength, but by reasonably designing the thickness and size of the iron ring, magnetic saturation can be effectively avoided, ensuring the shielding effect.

[0077] Silicon steel is a specially treated iron-silicon alloy with higher magnetic permeability and lower coercivity. Therefore, silicon steel rings can more effectively absorb and guide magnetic fields, reducing magnetic field leakage. Moreover, silicon steel rings have better anti-magnetic saturation capability under high magnetic field strength. Even in strong magnetic field environments, silicon steel rings can still maintain good shielding effect, further reducing magnetic field interference to mobile phone signals.

[0078] The following describes in detail the specific structure of an electronic device protective case 2 provided by an embodiment of this utility model, according to the appendix. Figure 6-7 As shown, the specific structure of the electronic device protective case 2 includes a protective case body and a magnetic ring 1 as described in the above embodiment, which is disposed on the protective case body.

[0079] The magnetic ring 12 is bonded to the adhesive ring 11, which is then fixed to the protective casing of the electronic device. This ensures the stability of the magnetic ring 12 and prevents it from shifting or loosening due to frequent use, thereby reducing magnetic loss. Since the metal ring 13 is located between the magnetic ring 12 and the electronic device, its high permeability forms a closed magnetic flux loop, significantly reducing magnetic resistance and preventing magnetic lines of force from directly penetrating the electronic device. Simultaneously, the metal ring 13 confines the magnetic field lines within itself, reducing the magnetization of ferromagnetic materials inside the electronic device and suppressing demagnetization, thus maintaining the magnetic force of the magnetic ring for a long period without attenuation.

[0080] according to Figure 6 As shown, in some specific embodiments, the protective shell body is recessed with an annular positioning cavity 24, and the magnetic ring 1 is disposed in the annular positioning cavity 24. The outer side of the magnetic ring 1 is interference-fitted with the cavity wall of the annular positioning cavity 24.

[0081] Specifically, the annular positioning cavity 24 is an annular groove in the main body of the protective shell, located at the center of the main body and corresponding to the back panel of the electronic device. This allows the magnetic ring 1 to be precisely installed in the protective shell and facilitates alignment with external magnetic devices. The size of the annular positioning cavity 24 matches the outer diameter of the magnetic ring 1, ensuring that the magnetic ring 1 can be tightly embedded within it, preventing it from loosening or shifting after installation.

[0082] The outer side of the magnetic ring 1 is installed with the cavity wall of the annular positioning cavity 24 by an interference fit. By applying a certain pressure, the two are tightly connected. This connection method has the characteristics that the interference fit can ensure that the magnetic ring 1 and the annular positioning cavity 24 are tightly connected and there will be no loosening or shaking. It also provides sufficient friction so that the magnetic ring 1 can remain stable during use and will not be displaced by external forces.

[0083] according to Figure 6 As shown, in some specific embodiments, the protective shell body is recessed with a positioning cavity 21; the electronic device protective shell 2 also includes a tail magnet 22 and a tail magnet protective sheet 23 that are bonded together, and the tail magnet 22 and the tail magnet protective sheet 23 are both disposed in the positioning cavity 21.

[0084] Specifically, the protective shell body has a recessed positioning cavity 21 to accommodate the tail magnet 22 and the tail magnet protective plate 23. The tail magnet 22 is a magnetic material used to enhance the magnetic attraction function, while the tail magnet protective plate 23 is an insulating material used to protect the electronic device from magnetic field interference. Specifically, the tail magnet 22, through its magnetic properties, works together with the magnetic ring 12 of the magnetic ring 1 to enhance the overall magnetic attraction force. Since the magnetic force direction of the tail magnet 22 is consistent with the magnetic force direction of the magnetic ring 1, a stronger magnetic field is formed, thus improving the attraction ability of the protective shell to external magnetic devices. By setting the tail magnet 22, the magnetic attraction force is more evenly distributed, avoiding the problem of insufficient or uneven local magnetic force that may occur when the magnetic ring 1 works alone, thereby improving the stability during the attraction process. The tail magnet protective plate 23 can effectively isolate the magnetic field generated by the tail magnet 22, preventing the magnetic field from directly acting on the electronic device. Moreover, the tail magnet protective plate 23 also plays a physical isolation role, preventing the tail magnet 22 from directly contacting the back panel of the electronic device.

[0085] according to Figure 7-8 As shown, the electronic device protective case 2 also includes a touch key 3, which includes a touch key body and a conductor 32. Multiple accommodating cavities with openings are provided along the length of the touch key body. Two protruding rings 33 are provided at the upper and lower ends of the touch key body. Multiple conductors 32 are provided, and each conductor 32 is detachably built into its respective accommodating cavity. One end of the conductor 32 extends to the opening for contact with the touch button of the electronic device.

[0086] Specifically, multiple accommodating cavities are arranged within the main body of the touch key, with a certain distance between each cavity. By assembling each conductor 32 into each cavity, when the device is fitted onto the electronic device and the main body of the touch key is snapped into the mounting opening of the protective sleeve, one end of each conductor 32 fits against the touch button of the electronic device through the opening. Therefore, when the user's finger slides along the touch surface of the touch key body, the touch button can be touched by the action of each conductor 32. This design protects the touch button of the electronic device, preventing the entire touch button from being exposed and easily scratched, flattened, or damaged by other hard objects.

[0087] It should be noted that, since the touch buttons of electronic devices are provided with multiple charge contacts, one end of each conductor 32 in this embodiment of the invention is respectively attached to multiple charge contacts on the shooting button. Multiple independent charge transfer channels are formed through each conductor 32. When the user's finger touches each charged point on the touch surface of the touch button body, since human tissue (especially skin) is a dielectric, it can enhance the capacitive coupling effect. Therefore, under the action of the human body's electric field, the user's finger and the conductor 32 form a coupling capacitor, which is used to trigger some of the charge contacts of the touch button. At the same time, if the finger slides further along the length of the touch surface of the touch button body, the finger disconnects the charge contact of the previous conductor 32 and connects the charge contact of the next conductor 32, thereby realizing the touch control of the touch button of the electronic device.

[0088] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A magnetic ring, characterized in that, The magnetic ring includes: Adhesive rings; A magnetic ring, wherein the magnetic ring is bonded to the adhesive ring; A metal ring is bonded to the end face of the magnetic ring away from the adhesive ring; A protective ring is attached to the end face of the metal ring away from the magnetic ring.

2. The magnetic ring according to claim 1, characterized in that, The magnetic ring comprises multiple magnetic blocks, which are spaced apart circumferentially.

3. The magnetic ring according to claim 2, characterized in that, The metal ring comprises multiple metal blocks, which are spaced apart circumferentially and are bonded to each of the magnetic blocks in a one-to-one correspondence.

4. The magnetic ring according to claim 3, characterized in that, The magnetic ring also includes multiple first adhesive sheets, the first adhesive surface of each first adhesive sheet being bonded to each of the magnetic blocks in a one-to-one correspondence, and the second adhesive surface of each first adhesive sheet being bonded to each of the metal blocks in a one-to-one correspondence.

5. The magnetic ring according to claim 3, characterized in that, The magnetic ring also includes multiple second adhesive sheets, the first adhesive surface of each second adhesive sheet being bonded to the end face of each metal block away from the magnetic ring, and the second adhesive surface of each second adhesive sheet being bonded to the protective ring.

6. The magnetic ring according to claim 1, characterized in that, The adhesive ring has multiple through-holes.

7. The magnetic ring according to claim 1, characterized in that, The metal ring is one of an iron ring, a silicon steel ring, or a stainless steel ring.

8. A protective case for an electronic device, characterized in that, The electronic device protective case includes: Protective shell body; The magnetic ring according to any one of claims 1-7, wherein the magnetic ring is disposed on the protective shell body.

9. The electronic device protective case according to claim 8, characterized in that, The protective shell body has a recessed annular positioning cavity, and the magnetic ring is disposed in the annular positioning cavity. The outer side of the magnetic ring is interference-fitted with the cavity wall of the annular positioning cavity.

10. The electronic device protective case according to claim 8, characterized in that, The protective shell body is recessed with a positioning cavity; The protective shell of the electronic device also includes a tail magnet and a tail magnet protective sheet that are bonded together, and both the tail magnet and the tail magnet protective sheet are disposed in the positioning cavity.

Images