Magnet structure for enhancing single-side magnetism of special-shaped magnet

Abstract

The utility model relates to the technical field of magnets, in particular to a magnet structure for enhancing single-side magnetism of a special-shaped magnet, which comprises a magnet and a magnetism isolating cover covering the magnet, a blind hole is arranged on the magnetism isolating cover, the magnet is arranged in the blind hole, an arc-shaped inward convex side wall is formed at the corner of a groove, and the magnet is arranged in the groove. The magnet is provided with an outer concave side face used for being attached to and abutting against the inner convex side wall of the groove. According to the magnetic device, the outer concave side faces of the magnets can abut against the inner convex side walls of the blind holes, the binding force between the magnets and the cover body is enhanced, only one side of each magnet has magnetism, the magnetism of the single side of each magnet is enhanced, and in the magnetic device, the magnets cannot attract or repel each other; therefore, some adverse effects on the magnetic device are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnet technical field especially disclose a magnet structure of enhancing special-shaped magnet single side magnetism. BACKGROUND

[0002] In recent years, with the high-speed development of computer, video recording equipment, communication equipment and other fields, these equipments gradually develop towards miniaturization and micromation. Miniaturization design not only makes the equipment more compact, but also improves the portability and functional integration of the equipment. However, the miniaturization of the equipment also brings higher requirements for the miniaturization, high precision and high performance of magnetic accessories (such as magnets, sensors, magnetic force driving devices, etc.). In these applications, the magnet needs to have stronger performance to support the efficient operation of the equipment in a smaller space.

[0003] At present, most of the magnets have double-sided magnetism. When manufacturing some devices using magnets, the phenomenon of several magnets attracting or repelling each other often occurs, which seriously affects the use CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a magnet structure which has magnetism only on one side and strong single-sided magnetism.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses a magnet structure for enhancing single-sided magnetism of special-shaped magnet, which comprises a magnet and a magnetic shielding cover arranged on the magnet. A recess is arranged on the magnetic shielding cover, and the magnet is arranged in the recess. An arc-shaped inner convex side wall is formed at the corner of the recess, and an outer concave side surface of the magnet is arranged for abutting against the inner convex side wall of the recess. In the utility model, the outer concave side surface of the magnet can abut against the inner convex side wall of the recess, thereby enhancing the bonding force between the magnet and the cover body. In addition, the magnet has magnetism only on one side, and the single-sided magnetism is enhanced. In the magnetic device, the phenomenon of mutual attraction or repulsion between the magnets does not occur, thereby avoiding some adverse effects in the magnetic device.

[0006] Further, the magnetic shielding cover 2 is provided with a reference surface, and the recess 3 is recessed from the reference surface. One side of the magnet abuts against the groove bottom of the recess, and the other side of the magnet protrudes out of the reference surface of the magnetic shielding cover 2. The magnetic flux lines generated by the part of the magnet in the recess are effectively guided and concentrated on the opening side of the shielding cover through the shielding cover, thereby avoiding the diffusion of the magnetic flux lines to other directions, forming a single-sided magnetic field, and the protruding side of the magnet can fully utilize the magnetic force of the magnetic core, thereby expanding the application range of the magnetic force.

[0007] Further, the ratio of the thickness of the magnet to the depth of the groove is 1.1-1.3. This design ensures a reasonable ratio between the thickness of the magnet and the depth of the groove, so that the magnet can better adapt to the spatial structure of the groove. At this ratio, the support surface and the force surface of the magnet are more balanced, which helps to reduce the wear or deformation of the magnet during use, while the magnetic force of the magnetic core can be fully utilized to expand the application range of the magnetic force.

[0008] Further, a plurality of ribs 6 protrude outwardly on the inner wall of the groove, and the plurality of ribs 6 are arranged around the magnet 1 and clamped against the magnet. The ribs not only increase the stability between the magnet and the magnetic shield, but also help to firmly fix the magnet, avoid its deviation or vibration during use, improve the service life of the magnet, reduce the damage of external impact to the magnet, and at the same time increase the stability of the magnetic shield structure.

[0009] Further, a plurality of ribs 6 protrude outwardly on the inner wall of the groove, and the plurality of ribs 6 are arranged around the magnet 1 and clamped against the magnet. The ribs not only increase the stability between the magnet and the magnetic shield, but also help to firmly fix the magnet, avoid its deviation or vibration during use, improve the service life of the magnet, reduce the damage of external impact to the magnet, and at the same time increase the stability of the magnetic shield structure.

[0010] Further, the magnetic shield is an iron shell, and the thickness of the magnetic shield is 0.08-0.12mm. The magnetic shield adopts an iron shell, which has good corrosion resistance and strength, ensuring the durability of the device in humid or corrosive environments. Its thickness is 0.08-0.12mm, which takes into account the material strength and the permeability of the magnetic field, ensuring the protection of the magnet without significantly interfering with the magnetic force.

[0011] Further, the magnet is a neodymium iron boron permanent magnet or a samarium cobalt permanent magnet. Neodymium iron boron and samarium cobalt permanent magnets are high-performance magnet materials with high magnetic energy product and magnetic flux density, which can improve the magnetism of the magnet and increase the use efficiency and stability of the magnet.

[0012] Further, the surface of the magnet is provided with an electroplated protective layer. The electroplated protective layer is mainly used to enhance the corrosion resistance of the magnet surface, especially in humid and oxidizing environments. The electroplated layer forms a metal protective film, effectively isolating the corrosive effects of the external environment on the magnet surface, prolonging the service life of the magnet.

[0013] Further, the electroplated protective layer is a zinc plating layer. The zinc plating layer can maintain a good appearance of the magnet surface and provide long-term protection, and further improve the corrosion resistance of the magnet in humid or acidic and alkaline environments.

[0014] Further, the thickness of the electroplated protective layer is 5-10μm. The thickness of the electroplated layer usually determines the duration of its protective effect. A thickness of 5-10μm can effectively block the erosion of external corrosive substances, while not being too thick to affect the working performance of the magnet.

[0015] The utility model discloses the outer concave side surface of magnet can resist the inner convex lateral wall of recess, has strengthened the combination of magnet and cover body between, and make magnet only one side have magnetism, and unilateral magnetism can be enhanced, in magnetic device, each magnet between will not produce the phenomenon of mutual attraction or repulsion, thereby in magnetic device avoided some bad influence, the magnetic flux magnetic force line that part magnet in recess produces is effectively guided and concentrated in the opening side of shield cover, avoided the diffusion of magnetic force line to other directions, formed unilateral magnetic field, the one side of magnet protrudes in recess can make full use of the magnetic force of magnetic core, expands magnetic force application range,

[0016] The rib not only increases the stability between the magnet and the magnetic shield, but also helps to firmly fix the magnet, avoids deviation or vibration during use, improves the service life of the magnet, reduces the damage of external impact to the magnet, and at the same time, the rib increases the stability of the magnetic shield structure; the surrounding edge can provide additional support for assembly, increase the stability of the magnetic shield structure, and at the same time, avoid damage to the cover body due to external force or friction during installation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an exploded schematic view of the magnet structure for enhancing unilateral magnetism of special-shaped magnet of the utility model;

[0018] Figure 2 It is a structural schematic view of the magnet structure for enhancing unilateral magnetism of special-shaped magnet of the utility model;

[0019] Figure 3 It is a structural schematic view of another view angle of the magnet structure for enhancing unilateral magnetism of special-shaped magnet of the utility model;

[0020] Figure 4 It is a structural schematic view of the magnetic shield of the utility model;

[0021] Figure 5 It is a sectional schematic view of the magnet structure for enhancing unilateral magnetism of special-shaped magnet of the utility model;

[0022] Figure 6 It is Figure 5 A partial schematic view in the utility model.

[0023] The reference signs include:

[0024] 1, magnet; 2, magnetic shield; 3, recess; 4, inner convex lateral wall; 5, outer concave side surface; 6, rib; 7, surrounding edge, 8, soft rubber ring; 9, glue. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0026] Please refer to Figures 1 to 6 As shown in the figure, the utility model discloses a magnet structure for enhancing the single-sided magnetism of a special-shaped magnet, comprising a magnet 1 and a magnetic shield 2 covering the magnet 1, wherein the magnetic shield 2 is provided with a groove 3, the magnet 1 is placed in the groove 3, the corner of the groove 3 is formed with an arc-shaped inner convex side wall 4, and the magnet 1 is provided with an outer concave side surface 5 for being attached to the inner convex side wall 4 of the groove 3. In the utility model, the outer concave side surface 5 of the magnet 1 can be in contact with the inner convex side wall 4 of the groove 3, thereby enhancing the bonding force between the magnet 1 and the cover body, and making the magnet 1 have magnetism on only one side, and the single-sided magnetism is enhanced. In the magnetic device, the magnets 1 will not be attracted or repelled, thereby avoiding some adverse effects in the magnetic device.

[0027] The magnetic shield 2 is provided with a reference surface, the groove 3 is formed by being recessed from the reference surface, one side of the magnet 1 is in contact with the groove bottom of the groove 3, and the other side of the magnet 1 protrudes out of the reference surface of the magnetic shield 2. The magnetic flux lines generated by the part of the magnet 1 in the groove 3 are effectively guided and concentrated on the opening side of the shielding cover through the shielding cover, thereby avoiding the diffusion of the magnetic flux lines to other directions, forming a single-sided magnetic field, and the protrusion of one side of the magnet 1 out of the groove 3 can fully utilize the magnetic force of the magnetic core and expand the application range of the magnetic force.

[0028] The ratio of the thickness of the magnet 1 to the depth of the groove 3 is 1.1-1.3. This design ensures a reasonable ratio between the thickness of the magnet 1 and the depth of the groove 3, so that the magnet 1 can better adapt to the spatial structure of the groove 3. Under this ratio, the support surface and the stress surface of the magnet 1 are more balanced, which helps to reduce the wear or deformation of the magnet 1 during use, and at the same time, the magnetic force of the magnetic core can be fully utilized to expand the application range of the magnetic force.

[0029] Specifically, the ratio of the thickness of the magnet 1 to the depth of the groove 3 is 1.2.

[0030] A plurality of rib portions 6 protruding outward are arranged on the inner wall of the groove 3, the plurality of rib portions 6 are arranged around the magnet 1, and the rib portions 6 clamp and contact the magnet 1. The rib portions 6 not only increase the stability between the magnet 1 and the magnetic shield 2, but also help to firmly fix the magnet 1, avoid the magnet 1 from being deviated or vibrated during use, improve the service life of the magnet 1, reduce the damage of external impact to the magnet 1, and at the same time, the rib portions 6 increase the stability of the structure of the magnetic shield 2; at the same time, the rib portions 6 protrude out of the inner wall of the groove 3, and when the rib portions 6 clamp the magnet 1, there is a gap between the magnet 1 and the shielding cover 2, which is convenient for heat dissipation of the magnet 1 while ensuring stability.

[0031] The outer side of the opening edge of the magnetic shield 2 is provided with a surrounding edge 7. The surrounding edge 7 can provide additional support force for assembly, increase the stability of the structure of the magnetic shield 2, and at the same time avoid damage to the shield body due to external force or friction during installation.

[0032] The magnetic shield 2 is an iron shell, and the thickness of the magnetic shield 2 is 0.08-0.12mm. The magnetic shield 2 adopts an iron shell, which has good corrosion resistance and strength, ensuring the durability of the device in a humid or corrosive environment. Its thickness is 0.08-0.12mm, which takes into account the material strength and the permeability of the magnetic field, ensuring the protection of the magnet 1 without significantly interfering with the magnetic force.

[0033] Specifically, the thickness of the magnetic shield 2 is 0.1mm.

[0034] The magnet 1 is a neodymium iron boron permanent magnet 1 or a samarium cobalt permanent magnet 1. Neodymium iron boron and samarium cobalt permanent magnets 1 are high-performance magnet 1 materials with high magnetic energy product and magnetic flux density, which can improve the magnetism of the magnet 1 and increase the efficiency and stability of the magnet 1.

[0035] Specifically, in this embodiment, the magnet 1 is a neodymium iron boron permanent magnet 1, which has the highest magnetic energy product known so far. The magnetic energy product is an important indicator for evaluating the strength and efficiency of the magnet 1. High magnetic energy product means that the neodymium iron boron magnet 1 can provide a strong magnetic field in a small volume. It can efficiently generate a strong magnetic field with low energy consumption. Therefore, devices using neodymium iron boron permanent magnets 1 can generally improve efficiency and reduce energy loss.

[0036] The surface of the magnet 1 is provided with an electroplated protective layer. The electroplated protective layer is mainly used to enhance the corrosion resistance of the surface of the magnet 1, especially in humid and oxidizing environments. The electroplated layer forms a metal protective film, effectively isolating the corrosive effects of the external environment on the surface of the magnet 1, prolonging the service life of the magnet 1.

[0037] The electroplated protective layer is a zinc plating layer. The zinc plating layer can maintain a good appearance on the surface of the magnet 1 and provide long-term protection, and further improve the corrosion resistance of the magnet 1 in humid or acidic and alkaline environments.

[0038] The thickness of the electroplated protective layer is 5-10μm. The thickness of the electroplated layer usually determines the duration of its protective effect. A thickness of 5-10μm can effectively block the erosion of external corrosive substances, while not being too thick to affect the working performance of the magnet 1.

[0039] Specifically, the thickness of the electroplated protective layer is 10μm.

[0040] Specifically, the edge of the magnet 1 is provided with a chamfer. The neodymium iron boron permanent magnet 1 and the like generally have high brittleness, and are prone to cracking or breaking, especially when impacted or rubbed by external force. By providing the chamfer at the edge of the magnet 1, stress concentration at the sharp corner can be avoided, thereby reducing the cracking or breaking caused by external force. At the same time, the magnet 1 generally needs to be matched or installed with other components, especially in applications such as motors and sensors, the magnet 1 is often closely combined with other parts. The chamfer at the edge of the magnet 1 can help avoid scratching or interference during assembly, thereby improving assembly accuracy.

[0041] Specifically, the chamfer radius is 0.4-0.9mm. In the embodiment, the chamfer radius is 0.45mm.

[0042] In the embodiment, the residual magnetic induction intensity of the magnet structure for enhancing the single-sided magnetism of the special-shaped magnet is not less than 1.45T, the coercive force is not less than 14koe, the intrinsic coercive force is not less than 17koe, and the magnetic energy product is 51-55MGOe.

[0043] Specifically, the soft rubber ring 8 is arranged between the outer side of the magnet 1 and the inner side wall of the groove 3, and the rib portion 6 deforms the soft rubber ring 8. The elastic deformation of the soft rubber ring 8 stably installs the magnet 1 in the shielding cover 2.

[0044] Specifically, the glue 9 is arranged in the groove 3, and the glue 9 adheres the magnet 1 and the shielding cover 2 after the magnet 1 is installed. The soft rubber ring 8 can cover and block the glue 9 in the groove 3 to prevent the glue 9 from escaping.

[0045] During installation, the magnet 1 is placed in the groove 3 of the magnetic shield 2 to ensure good contact between the magnet 1 and the inner wall of the magnetic shield 2. The magnet 1 is stably fixed in the groove 3, the outer concave side 5 of the magnet 1 abuts against the inner convex side wall 4 of the groove 3, and the rib portion 6 of the inner wall of the groove 3 clamps and abuts against the magnet 1 to avoid any looseness, thereby ensuring the directivity of the magnetic field. The magnetic flux lines generated by part of the magnet 1 in the groove 3 are effectively guided and concentrated on the opening side of the shielding cover via the shielding cover, avoiding the diffusion of the magnetic flux lines to other directions, forming a single-sided magnetic field. The side of the magnet 1 protruding out of the groove 3 can fully utilize the magnetic force of the magnetic core, and expand the application range of the magnetic force.

[0046] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet, characterized in that: It includes a magnet (1) and a magnetic shield (2) covering the magnet (1). The magnetic shield (2) has a groove (3) and the magnet (1) is placed in the groove (3). An arc-shaped inner convex sidewall (4) is formed at the corner of the groove (3). The magnet (1) has an outer concave sidewall (5) for attaching and abutting against the inner convex sidewall (4) on the groove (3).

2. The magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 1, characterized in that: The magnetic shield (2) has a reference surface, and the groove (3) is recessed from the reference surface. One side of the magnet (1) abuts against the bottom of the groove (3), and the other side of the magnet (1) protrudes from the reference surface of the magnetic shield (2).

3. The magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 2, characterized in that: The ratio of the thickness of the magnet (1) to the depth of the groove (3) is 1.1-1.

3.

4. The magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 1, characterized in that: The inner wall of the groove (3) is provided with multiple outwardly protruding ribs (6), which are arranged around the magnet (1) and clamp and abut against the magnet (1).

5. The magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 1, characterized in that: The magnetic shield (2) has a rim (7) on the outside of the opening edge.

6. The magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 1, characterized in that: The magnetic shield (2) is an iron shell with a thickness of 0.08-0.12 mm.

7. The magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 1, characterized in that: The magnet (1) is a neodymium iron boron permanent magnet (1) or a samarium cobalt permanent magnet (1).

8. The magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 1, characterized in that: The surface of the magnet (1) is provided with an electroplated protective layer.

9. A magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 8, characterized in that: The electroplated protective layer is a zinc plating layer.

10. A magnet structure for enhancing the unilateral magnetism of an irregularly shaped magnet according to claim 8, characterized in that: The thickness of the electroplated protective layer is 5-10 μm.

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