Magnetic part and vibration device

Abstract

The utility model discloses a magnetic piece and a vibration device, the magnetic piece comprises at least two magnet parts (10), and each magnet part (10) comprises two magnetic poles; the non-magnetic part (11) is arranged between every two adjacent magnet parts (10), the magnetic poles of the magnet parts (10) and the non-magnetic part (11) are arranged along the axis of the magnetic part, and the polarities of the two adjacent magnetic poles of every two adjacent magnet parts are the same; and the magnetic piece is an integrated part. The vibration device in the utility model comprises a magnetic piece. According to the utility model, the magnetic piece is an integrated part, the size precision of the magnetic piece can be ensured through a processing technology, compared with a mode of connecting a plurality of magnets, the size precision of the magnetic piece is higher, and when the magnetic piece is assembled with other parts, higher assembly precision can be obtained, so that the overall running performance of a product is improved.

Description

[0001] Priority information: This application claims priority to the Chinese patent application with application number 202111062238.3 filed on September 10, 2021. Technical Field

[0002] The utility model relates to the technical field of magnetization, in particular to a magnetic part and a vibration device. Background Art

[0003] Magnetic parts, such as magnets, have magnetism and can attract ferromagnetic materials. They are widely used in daily production and life, for example, as vibrators of vibration devices such as bone conduction sound devices or linear vibration motors.

[0004] In order to increase the magnetic force of the vibrator, the vibrator usually includes multiple magnets, and two adjacent magnets are separated by a magnetic conductor. Multiple connected magnets and magnetic conductors increase the number of parts, making assembly more difficult and the assembly accuracy is poor. In addition, the need to use magnetic conductors to separate multiple connected magnets will increase the overall volume, thereby affecting the utilization of space.

[0005] Taking a vibration device such as a bone conduction sound-generating device or a linear vibration motor as an example, it usually includes a shell, a coil connected to the shell, and a vibrator connected to the coil. The vibrator includes multiple magnets and a magnetic conductor connected between two adjacent magnets. When the coil is energized, the vibrator can vibrate back and forth in response to changes in the magnetic field of the coil. The existing vibrator is large in size because it is made of multiple parts connected together. In addition, there is a repulsive force between the magnets during the assembly process, which makes the assembly process complicated. It is difficult to ensure the size of the component after assembly, and further makes it difficult to ensure the assembly accuracy between it and the coil. It is easy for the vibrator to contact the coil or surrounding shells and other parts during the vibration process, thereby affecting the sound quality or causing excessive noise, or even damaging related parts due to impact.

[0006] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0007] The utility model aims to provide a magnetic component and a vibration device, the dimensional accuracy of the magnetic component is easier to ensure.

[0008] In order to achieve the above-mentioned purpose of the utility model, in the first aspect, the utility model proposes a magnetic component, comprising:

[0009] at least two magnet portions, each of the magnet portions comprising two magnetic poles; and

[0010] a non-magnetic portion, arranged between two adjacent magnetic portions, wherein the magnetic poles of the magnetic portion and the non-magnetic portion are arranged along the axis of the magnetic member, and the polarities of two adjacent magnetic poles of two adjacent magnetic portions are the same;

[0011] The magnetic component is an integrated part.

[0012] Furthermore, a groove is provided on the outer peripheral surface of the magnetic member;

[0013] The groove is annular and is arranged around the outer peripheral surface of the magnetic member;

[0014] Alternatively, the outer peripheral surface of the magnetic member includes a plurality of side surfaces, and at least one of the side surfaces is provided with the groove.

[0015] Further, the groove is only provided on the outer peripheral surface of the non-magnetic portion; or,

[0016] The groove is only formed on the outer peripheral surface of the magnet portion; or,

[0017] The groove covers at least a portion of the magnet portion and at least a portion of the non-magnetic portion simultaneously.

[0018] Furthermore, the extending direction of the groove is perpendicular to the axis of the magnetic member. Furthermore, the thickness of the non-magnetic part is greater than 0.3 mm.

[0019] Furthermore, the maximum value of the thickness of the non-magnetic portion is smaller than the minimum value of the thickness of any one of the magnetic portions.

[0020] Furthermore, there is a smooth transition between the magnetic portion and the non-magnetic portion.

[0021] Furthermore, the cross-sectional shapes at both ends of the magnetic member are the same, and the cross-sectional shapes at both ends of the magnetic member are different from the cross-sectional shape of the middle portion of the magnetic member.

[0022] Furthermore, the cross section of the magnetic member perpendicular to its axis is circular or polygonal.

[0023] In a second aspect, the utility model proposes a vibration device, comprising a magnetic member as described in any one of the above items. Further, the vibration device also includes a shell, a coil disposed in the shell, and a spring connected between the magnetic member and the shell, the magnetic member is disposed in the coil, and the gap between the inner wall of the coil and the outer wall of the magnetic member is 0.05 mm to 0.6 mm.

[0024] Furthermore, the gap between the inner wall of the coil and the outer wall of the magnetic component is 0.15 mm to 0.3 mm.

[0025] Furthermore, the coil is arranged around the outer circumference of the non-magnetic portion, and the height of the coil is greater than or equal to the thickness of the non-magnetic portion.

[0026] Further, the height of the coil is greater than the thickness of the non-magnetic portion, the non-magnetic portion is symmetrical about a second symmetry plane in the thickness direction thereof, and the coil is symmetrical about the second symmetry plane.

[0027] Compared with the prior art, the utility model has the following beneficial effects: in the utility model, the magnetic part includes a magnet part and a non-magnetic part, which is an integrated part and does not need to be assembled. Its dimensional accuracy can be ensured through processing technology. Compared with the form of connection through multiple magnets, its dimensional accuracy is higher. When assembled with other parts, higher assembly accuracy can be obtained, thereby improving the overall operating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a magnetic component in one implementation mode of the utility model.

[0029] Figure 2 yes Figure 1 Schematic diagram of the central magnetic component being connected to the coil.

[0030] Figure 3 It is a schematic structural diagram of a magnetic component in one embodiment of the utility model, and the magnetic component in the figure has two non-magnetic parts.

[0031] Figure 4 This is a schematic structural diagram of a magnetic component in one embodiment of the utility model. The two ends of the magnetic component in the figure have rectangular cross-sections and the middle has a circular cross-section.

[0032] Figure 5 It is a schematic structural diagram of a magnetic component according to an embodiment of the present invention, in which the magnetic part and the non-magnetic part of the magnetic component are not symmetrical relative to the first symmetry plane.

[0033] Figure 6 It is a schematic structural diagram of a magnetic component in one embodiment of the utility model, and the magnetic component in the figure has an annular groove.

[0034] Figure 7 It is a schematic structural diagram of a magnetic component in one embodiment of the utility model, and the magnetic component in the figure is a rectangular parallelepiped as a whole.

[0035] Figure 8 It is a schematic structural diagram of a magnetic component in one embodiment of the utility model, in which a groove of the magnetic component is provided on a non-magnetic portion.

[0036] Fig. 9 It is a schematic structural diagram of a magnetic component in one embodiment of the utility model, in which a groove of the magnetic component is provided on the magnet part.

[0037] Fig.10 It is a structural schematic diagram of a bone conduction sound generating device according to one embodiment of the present invention.

[0038] Fig.11 yes Figure 3 Schematic diagram of the magnetic member shown in FIG. 1 being fitted into the coil.

[0039] Fig.12 It is a structural schematic diagram of a magnetizer in one implementation mode of the utility model.

[0040] Fig.13 It is a schematic diagram of the utility model when the block to be magnetized is placed in the tooling.

[0041] Fig.14 It is a structural schematic diagram of the magnetic guide sleeve in the utility model.

[0042] Fig.15 It is a schematic diagram of an implementation mode when magnetizing coils are arranged on both sides of the block to be magnetized in the utility model.

[0043] Fig.16 It is a schematic diagram of another implementation mode when magnetizing coils are arranged on both sides of the block to be magnetized in the utility model.

[0044] Fig.17 It is a schematic diagram of a block to be magnetized in the utility model having a plurality of magnetizing coils surrounding the outside thereof.

[0045] Fig.18 is through Fig.12 Schematic diagram of a magnetic piece formed by magnetization of a magnetizer shown. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] like Figure 1 As shown, a magnetic part 1 corresponding to a preferred embodiment of the utility model is made of a magnetic material. The magnetic material can be, for example, ferrite, neodymium iron boron, aluminum nickel cobalt and samarium cobalt. After magnetization, the magnetic part 1 can generate a magnetic field that attracts, for example, ferromagnetic materials. The utility model is magnetized by an integrated magnetization method, which will be described in detail below.

[0050] The magnetic member 1 has two end surfaces 15 and an outer peripheral surface connected between the end surfaces 15 . The magnetic member 1 also has an axis 16 passing through the geometric centers of the two end surfaces 15 , and the axis is perpendicular to the two end surfaces 15 .

[0051] The magnetic part 1 includes at least two magnet parts 10 and a non-magnetic part 11 located between two adjacent magnet parts 10, the non-magnetic part 11 and the magnet part 10 are directly connected, and the two adjacent magnet parts 10 are separated by the non-magnetic part 11. It can be understood that the magnet part 10 and the non-magnetic part 11 are part of the magnetic part 1 rather than separate parts, that is, the magnetic part 1 is a single part rather than an assembly formed by connecting two or more parts. Each magnet part 10 includes two poles, namely an N pole and an S pole, and the two poles are arranged along the axis of the magnetic part 1.

[0052] As a preferred embodiment, the polarities of the two magnetic poles of two adjacent magnet parts 10 that are arranged opposite to each other (or adjacent to each other) are the same. Figure 2 When it is connected to the coil 20 of a vibration device such as a bone conduction sound generator or a linear vibration motor, the magnetic lines of force can be concentrated to pass through the coil 20 approximately vertically. After the coil 20 is energized, a greater driving force can be generated, thereby improving the driving force, sensitivity and vibration amount of the vibration device. A plurality of magnet portions 10 are arranged along the axis 16 of the magnetic member 1, and the non-magnetic portion 11 separates two adjacent magnet portions 10, that is, the magnetic poles of the magnet portion 10 and the non-magnetic portion 11 are arranged along the axis 16 of the magnetic member 1.

[0053] Figure 1 and Figure 2 The magnetic member 1 shown includes a non-magnetic portion 11 and two magnetic portions 10, of course, the number is not limited thereto, for example, Figure 3 As shown, Figure 3The magnetic component 1 shown has two non-magnetic parts 11 and three magnetic parts 10. The same can be said for the case where there are more non-magnetic parts 11. In the case where there are multiple non-magnetic parts 11, the thickness of the multiple non-magnetic parts 11 can be the same or different. As a preferred embodiment, the thickness of the non-magnetic part 11 is above 0.3 mm, and its maximum value is less than the minimum value of the thickness of any magnetic part 10. If the thickness of the non-magnetic part 11 is too small, the boundary between the magnetic part 10 and the non-magnetic part 11 will be unclear, affecting the performance of the magnetic component 1. If it is too large, the magnetic part 10 will become smaller accordingly, affecting the magnetic flux and B value.

[0054] The cross-sectional shape of the magnetic member 1 is not limited (referring to the cross-sectional shape perpendicular to the axis 16), for example, its cross-sectional shape can be circular, elliptical, or triangular, rectangular or other polygonal. Moreover, the cross-sectional shapes at different positions of the magnetic member 1 and the parameters such as the size of the cross-sectional shape can be the same or different, such as Figure 4 As shown, Figure 4 The cross-sectional shapes of the two ends of the magnetic member 1 are shown to be rectangular, while the middle part is circular. As a preferred embodiment, the cross-sectional shapes at different positions of the magnetic member 1 and the parameters such as the size of the cross-sectional shapes are consistent so that it has a smoother surface. In this way, the transition between each magnetic part 10 and the non-magnetic part 11 on the magnetic member 1 is very smooth, so that the surface magnetic field of the magnetic member 1 forms a relatively complete sinusoidal wave distribution.

[0055] In addition, the magnetic part 10 and the non-magnetic part 11 formed on the magnetic member 1 can be symmetrical or asymmetrical relative to the first symmetric plane 12 of the magnetic member 1, and the first symmetric plane 12 is perpendicular to the axis 16 of the magnetic member 1. Figure 5 An asymmetric situation is shown.

[0056] Obviously, since the magnetic part 1 is a single component formed by magnetization, its dimensional accuracy can be guaranteed by processing accuracy, and no assembly is required. Compared with the method of connecting multiple magnets, it has higher dimensional accuracy, thereby further improving the assembly accuracy of the magnetic part 1 and other components. For example, when it is installed in the coil 20 of the vibration device, the assembly accuracy between the magnetic part 1 and the coil 20 is higher, so that the magnetic part 1 is not easy to contact and collide with the coil 20 when vibrating, ensuring the reliability and stability of the operation, and avoiding the magnetic circuit loss caused by assembly errors.

[0057] In addition, when multiple magnets are connected, they must be connected in a form where the same poles of two magnets are close to each other. Due to the existence of repulsive force, the connection is very difficult, which further reduces the dimensional accuracy after the connection is completed. The magnetic part 1 is made by magnetization, which is more convenient to process, can reduce the cost of accessories and labor costs during the assembly process, and improve production efficiency.

[0058] As a preferred embodiment, a groove 13 is provided on the outer circumference of the magnetic member 1. For the outer circumference of the magnetic member 1 with a circular cross section (i.e., cylindrical), refer to Figure 6 , the groove 13 can be set as an annular groove surrounding the outer circumference of the magnetic member 1, and the axis of the annular groove coincides with the axis 16 of the magnetic member 1; for the outer circumference of the magnetic member 1 with a polygonal cross section (for example, a multi-prism-shaped magnetic member 1), as Figure 7 and Figure 8 As shown, its outer circumference includes a plurality of side surfaces 14 connected end to end. In this case, the groove 13 can be provided on one or more side surfaces 14. Preferably, the center line 130 of the groove 13 is perpendicular to the axis 16 of the magnetic member 1, and its two ends extend to two side surfaces 14 adjacent to the side surface 14. When all side surfaces 14 are provided with grooves 13, and the opening heights of the grooves 13 are the same, the grooves 13 form an annular groove surrounding the outer circumference of the magnetic member 1.

[0059] The position of the groove 13 is not limited. For example, it can be only opened on the outer circumference of the non-magnetic part 11 and not cover the magnetic part 10; or only opened on the outer circumference of the magnetic part 10 and not cover the non-magnetic part 11; or it can cover both the magnetic part 10 and the non-magnetic part 11. In addition, one or more of the above-mentioned grooves can be provided on a magnetic part 1 at the same time. In a feasible situation, if Figure 8 As shown, the center line 130 of the groove 13 is located on the second symmetry plane of the non-magnetic part 11 (the non-magnetic part 11 is symmetrical with the second symmetry plane in the direction of its thickness D), the second symmetry plane is perpendicular to the axis 16 of the magnetic member 1, and the width B1 of the groove 13 is preferably greater than or equal to the thickness D of the non-magnetic part 11. In another feasible situation, as Fig. 9 As shown, the center line 130 of the groove 13 is located on the magnet portion 10 , and both ends thereof cover two adjacent non-magnetic portions 11 .

[0060] When the magnetic component 1 is matched with the matching hole of the coil or the shell, a layer of lubricating oil can be sprayed on the outer surface of the magnetic component 1 so that the magnetic component 1 and the matching hole are separated by the lubricating oil, and the movement is smoother. Since the groove 13 is provided on the outer surface of the magnetic component 1, the lubricating oil can be better stored in the groove 13, and the friction damping between the lubricating oil on the surface of the magnetic component 1 and the wall of the matching hole can be changed. Furthermore, the damping of the magnetic component 1 during vibration can be adjusted by changing the size of the groove 13 area, so as to facilitate the adjustment of the vibration performance of the magnetic component 1.

[0061] The utility model also proposes a vibration device, which includes the magnetic component 1 mentioned above. The vibration device can be, for example, a linear vibration motor or a bone conduction sound generating device.

[0062] Take the bone conduction sound device as an example. Fig.10As shown, the bone conduction sound generating device further includes a housing 2, a coil 20 disposed in the housing 2, and a spring 21 connected between the magnetic member 1 and the housing 2. The magnetic member 1 is fitted in the coil 20, and after the coil 20 is energized, it can reciprocate under the driving force of the magnetic field generated by the coil 20. Springs 21 are connected to both ends of the magnetic member 1, and the springs 21 are used to generate a force to drive the magnetic member 1 to return to its original position after the magnetic member 1 leaves the center position.

[0063] As mentioned above, the magnetic component 1 made by magnetization has better dimensional accuracy, so the assembly accuracy when it is assembled with the coil 20 is higher, and the gap between it and the inner wall of the coil 20 can be smaller. For example, the gap between the inner wall of the coil 20 and the outer wall of the magnetic component 1 is set to 0.05-0.6mm. In general, the smaller the gap between the coil 20 and the magnetic component 1, the greater the driving force of the coil 20 on the magnetic component 1, and the greater the sensitivity of the bone conduction sound-generating device. The smaller the gap, the easier it is for the magnetic component 1 to collide with the coil 20 during movement. Therefore, it is further preferred that the gap is set to 0.15-0.3mm to ensure that there is a low collision risk between the magnetic component 1 and the coil 20, while ensuring that the coil 20 has sufficient driving force on the magnetic component 1.

[0064] The position of the coil 20 corresponds to the non-magnetic portion 11, that is, the coil 20 is arranged around the outer periphery of the non-magnetic portion 11. The number of the coils 20 is not limited to one, specifically, the number thereof is the same as the number of the non-magnetic portions 11 or less than the number of the non-magnetic portions 11, such as Fig.11 As shown, Fig.11 The magnetic part 1 shown in the figure includes three magnetic parts 10 and two non-magnetic parts 11. Correspondingly, the number of coils 20 is also two, which are correspondingly arranged on the outer peripheries of the two non-magnetic parts 11. The height H of the coil 20 can be the same as the thickness D of the non-magnetic part 11, or it can be greater than the thickness D of the non-magnetic part 11. Preferably, the height H of the coil 20 is greater than the thickness D of the non-magnetic part 11, so that the magnetic lines of force derived from the non-magnetic part 11 can pass through the coil 20, thereby generating the maximum possible Lorentz force for driving, so that the response of the magnetic part 1 is more sensitive. Preferably, the coil 20 is symmetrically arranged on the non-magnetic part 11, and it is symmetrical with the second symmetry plane of the non-magnetic part 11. The width B of the area covered by the two magnetic parts 10 is the same, so as to achieve better symmetry.

[0065] The utility model also proposes a magnetizer, which is used to magnetize a magnetized part 1a to form the above-mentioned magnetic part 1. For the convenience of description, the magnetic part 1 to be magnetized is called the magnetized part 1a. After magnetization, the magnetized part 1a becomes the magnetic part 1. The magnetic part 1 to be magnetized can be, for example, a non-magnetic blank or a magnetic part 1 that needs to be magnetized again after its magnetism is weakened. Fig.12 and Fig.13As shown, the magnetizer includes a tool for placing the magnetized piece 1a during magnetization, a plurality of magnetic field generating devices arranged along the axis 16 of the magnetized piece 1a, and a power controller electrically connected to the magnetic field generating devices.

[0066] It can be understood that, since the magnetic member 1 is a single part, the member to be magnetized 1a is also a single part, which forms the magnetic member 1 after magnetization.

[0067] The magnetic field generating device is used to generate a magnetic field so that the magnetic material placed in the magnetic field can be magnetized. As a preferred embodiment, the magnetic field generating device includes at least one magnetizing coil 30, and the axis of the magnetizing coil 30 is arranged parallel to the axis 16 of the magnetic member 1. After being energized, the magnetizing coil 30 can generate a magnetic field, thereby magnetizing the magnetic material located in the magnetic field. The power controller is electrically connected to the magnetic field generating device and can supply power to the magnetic field generating device. It can also control parameters such as the current and voltage passed into the magnetic field generating device, thereby enabling the magnetic field generating device to generate a magnetic field of the required intensity. The magnetization method is not limited, for example, it can be constant current magnetization or pulse magnetization.

[0068] The tooling includes a magnetic sleeve 31, which is made of magnetic conductive materials, such as various iron products and alloys formed by rare earth elements. In this embodiment, the magnetic sleeve 31 is made of silicon steel sheets, which have excellent magnetic conductivity.

[0069] The inner hole shape of the magnetic sleeve 31 is consistent with that of the part to be magnetized 1a. After the part to be magnetized 1a is set in the tooling, it is inserted into the magnetic sleeve 31. The magnetic sleeve 31 covers the outside of the part to be magnetized 1a. The magnetic sleeve 31 can be in contact with the surface of the part to be magnetized 1a or have a certain gap. The part to be magnetized 1a includes a first part covered by the magnetic sleeve 31 and at least two second parts separated by the first part, and the second part is not covered by the magnetic sleeve 31.

[0070] The magnetic sleeve 31 is arranged between the magnetizing coil 30 and the part to be magnetized 1a, and is used to lead out and guide away the magnetic lines of force of the magnetic field generated by the magnetizing coil 30, so as to produce an electromagnetic shielding effect. In this way, the first part of the part to be magnetized 1a corresponding to the position of the magnetic sleeve 31 can be prevented from being passed through by the magnetic lines of force, thereby preventing the part from being magnetized, or making the part only subject to a small magnetization effect. Obviously, after magnetization, the first part of the part to be magnetized 1a corresponding to the position of the magnetic sleeve 31 forms the non-magnetic part 11 mentioned above, and the second part can be magnetized because the magnetic lines of force can pass through the part of the material, so that the part of the material is magnetized to form the magnetic part 10 mentioned above, with reference to Fig.18 , Fig.18 Shown by Fig.12 The magnetic member 1 is formed after magnetization by the magnetizer shown.

[0071] It can be understood that the number of magnetic sleeves 31 is determined by the number of non-magnetic parts 11 to be formed, and during magnetization, the magnetic sleeves 31 are sleeved at positions corresponding to the non-magnetic parts 11 to be formed, so that non-magnetic parts 11 can be formed at the required positions after magnetization.

[0072] As a preferred embodiment, the thickness D1 of the magnetic sleeve 31 is less than or equal to the thickness D of the corresponding non-magnetic part 11. The reason is that a certain transition zone will be generated between the magnet part 10 and the non-magnetic part 11, and the magnetic field strength in the transition zone is relatively weak. Therefore, the thickness D of the non-magnetic part 11 actually formed will be greater than the thickness D1 of the magnetic sleeve 31. By setting the thickness D1 of the magnetic sleeve 31 to be less than or equal to the thickness of the corresponding non-magnetic part 11, the dimensional accuracy of the thickness D of the formed non-magnetic part 11 can be guaranteed as much as possible. Further preferably, the thickness D1 of the magnetic sleeve 31 is less than the thickness D of the corresponding non-magnetic part 11, so that the size of the formed non-magnetic part 11 is closer to the design value. In practice, the thickness D1 of the magnetic sleeve 31 can be set according to the deviation value of the thickness of the magnetic sleeve 31 and the non-magnetic part 11 obtained by actual measurement.

[0073] In a preferred embodiment, the magnetic sleeve 31 is a single annular part, for example, a single circular tube or square tube. In another preferred embodiment, the magnetic sleeve 31 is composed of multiple parts, for example, it may include multiple magnetic plates 310, and the multiple magnetic plates 310 are connected to form the shape of the magnetic sleeve 31. Fig.14 , Fig.14 The figure shows a case where the cross section of the magnetic conductive sleeve 31 is rectangular, and the magnetic conductive sleeve 31 is formed by splicing four magnetic conductive plates 31 .

[0074] The magnetic field generating device corresponds to the position of the second part of the part to be magnetized 1a. When there are multiple magnet parts 10, the number of second parts to be magnetized is also multiple, and the number of magnetic field generating devices is also multiple. The outer side of the second part to be magnetized is correspondingly provided with a magnetic field generating device. Preferably, the axis of the magnetizing coil 30 is parallel to the axis 16 of the part to be magnetized 1a, so that the magnetic lines of force generated by the magnetizing coil 30 can pass through the second part roughly along the direction of the axis 16, thereby more efficiently magnetizing the part to be magnetized 1a.

[0075] Furthermore, in the case where the magnetic field generating device includes multiple magnetizing coils 30, the polarity direction of the magnetic fields generated by the multiple magnetizing coils 30 is the same, so that the magnetic lines of force generated by the multiple magnetizing coils 30 can penetrate from one side of the second part to the other side thereof in approximately the same direction. The multiple magnetizing coils 30 can make the magnetization density of the second part more uniform and the magnetization saturation better, thereby making the magnetism of the magnetized magnetic part 11 stronger.

[0076] Obviously, the polarity of the magnetic part 10 is opposite to the polarity direction of the magnetic field generated by the magnetizing coil 30 during magnetization. In this way, the direction of the magnetic field generated by the magnetizing coil 30 in each magnetic field generating device during magnetization can be controlled to control the polarity of the corresponding magnetic part 11. When the directions of the magnetic fields generated by the magnetizing coils 30 of two adjacent magnetic field generating devices are opposite, the polarities of the two adjacent magnetic poles of the two adjacent magnetic parts 10 on the magnetic member 1 will be the same. The direction of the magnetic field generated by the magnetizing coil 30 can be controlled by the winding direction of the coil or the flow direction of the current.

[0077] The magnetized part 1a is located outside the magnetizing coil 30, rather than being inserted into the magnetizing coil 30. In a preferred embodiment, Fig.15 and Fig.16 As shown, the magnetizing coils 30 of the magnetic field generating device are arranged on both sides of the to-be-magnetized member 1a, such as the upper and lower sides or the left and right sides, and the number of the magnetizing coils 30 on each side can be one or two or more; in other embodiments, such as Fig.17 As shown, the magnetizing coils 30 of the magnetic field generating device are arranged around the outer periphery of the part to be magnetized 1a, and the number of the magnetizing coils 30 is three or more (6 in the figure), and preferably, the multiple magnetizing coils 30 have the same specifications and are at the same distance from the axis 16 of the part to be magnetized 1a, so as to generate a more consistent magnetic field for magnetization.

[0078] Furthermore, if Fig.12 and Fig.13 As shown, the magnetizer also includes a connector 32 connected to the magnetic sleeve 31. The connector 32 is used to connect the magnetic sleeve 31 so that the magnetized part 1a can be better limited in the tooling. The connection method between the two is not limited, for example, it can be connected by gluing. The connector 32 is made of non-magnetic material, such as plastic, silicone, polyurethane and the like. Preferably, the connector 32 is made of polyurethane material, which has the advantages of easy processing and low cost.

[0079] The shape of the connecting member 32 is preferably annular, and it can be a single component or a combination of multiple connecting plates. Preferably, the connecting member 32 is consistent with the shape of the magnetic conductive sleeve 31, and cooperates with the magnetic conductive sleeve 31 to form a mounting hole 34. During magnetization, the part to be magnetized 1a is arranged in the mounting hole 34, so that the installation of the part to be magnetized 1a is more convenient, and the magnetic conductive effect of the magnetic conductive sleeve 31 is better.

[0080] Further preferably, the connectors 32 at both ends extend beyond the outer ends of the magnet part 10 , and magnetic conductive blocks 33 sealing the mounting holes 34 are connected to the ends of the connectors 32 to improve the magnetization effect.

[0081] As a preferred embodiment, the magnetizer also includes a position adjustment mechanism for adjusting the relative position of the magnetic field generating device and the part to be magnetized 1a, which can be manual, automatic or semi-automatic. Preferably, the position adjustment mechanism is automatic or semi-automatic, which is connected to the magnetic field generating device, and adjusts the relative position of the magnetic field generating device and the part to be magnetized 1a by moving the magnetic field generating device. The position adjustment structure can at least drive the magnetic field generating device to move along the axis 16 of the part to be magnetized 1a, for example, the magnetic field generating device can be driven to move by an electric cylinder, a pneumatic cylinder, an electric push rod, a servo module or a gear rack and other mechanisms; preferably, the position adjustment mechanism can also drive the magnetic field generating device to approach or move away from the part to be magnetized 1a in the radial direction; further preferably, the position adjustment mechanism can also drive the magnetic field generating device to rotate around the axis 16 of the part to be magnetized 1a to adjust the angle. In this way, during magnetization, the position and size of the non-magnetic part 11 and the magnetic part 10 formed after magnetization can be adjusted by changing the position of the magnetic field generating device.

[0082] Obviously, through the above-mentioned magnetizer, it is only necessary to place the block 1a to be magnetized into the limit position in the tooling, and then energize the magnetic field generating device to magnetize the block 1a to be magnetized, thereby conveniently obtaining the magnetic part 1, which is very convenient to use.

[0083] The utility model also proposes an integrated magnetization method, which magnetizes the magnetized component 1a to form the magnetic component 1 mentioned above. The integrated magnetization method includes the following steps:

[0084] S1 provides a magnetizer, the magnetizer comprises a magnetic conductive sleeve 31 and a magnetic field generating device;

[0085] S2. The magnetized member 1a is inserted into the magnetic conductive sleeve 31, and the magnetic field generating device is located outside the outer peripheral surface of the second portion;

[0086] S3. Adjust the relative position of the magnetic field generating device and the magnetized member 1a, wherein the magnetized member 1a comprises a first portion covered by the magnetic conductive sleeve 31 and a second portion separated by the first portion;

[0087] S4. Generate a magnetic field through the magnetic field generating device to magnetize the second part of the part to be magnetized 1a.

[0088] It can be understood that the first part corresponds to the position where the non-magnetic part 11 needs to be formed, and the second part corresponds to the position where the magnetic part 10 needs to be formed. When the magnetic field generating device magnetizes the second part, the second part forms the magnetic part 10, and the first part is not magnetized because it is shielded by the magnetic conductive sleeve 31, thereby forming the non-magnetic part 11.

[0089] As a preferred implementation, the magnetizer in the above step S1 is the magnetizer described above, and the integrated magnetization method of the present invention is implemented by the above magnetizer.

[0090] In the above step S1, a magnetic conductive sleeve 31 of corresponding thickness is selected according to the thickness of the non-magnetic part 11 to be formed. The magnetic field generating device includes at least one magnetizing coil 30, and a magnetic field is generated by energizing the magnetizing coil 30. The polarity direction of the magnetic field can be determined and changed by the winding direction of the magnetizing coil 30 or the direction of the current. As a preferred embodiment, the polarities of the magnetic fields generated by the two adjacent magnetic field generating devices are opposite, so that the polarities of the two adjacent magnet parts 10 formed are also opposite, and the polarities of the two opposite magnetic poles of the two adjacent magnet parts 10 are the same. The non-magnetic area 11 can be reliably generated by the oppositely charged magnetic fields generated by the two magnetic field generating devices, thereby ensuring the stability of the generated non-magnetic area 11.

[0091] In the above step S2 , the position of the magnetic conductive sleeve 31 needs to be adjusted to correspond to the position of the portion of the magnetized component 1 a where the non-magnetic portion 11 needs to be formed.

[0092] In the above step S3, the relative position of the magnetic field generating device and the part to be magnetized 1a can be, for example, the position of the magnetic field generating device along the axis of the part to be magnetized 1a and / or the radial distance from the part to be magnetized 1a. The relative position can be preset according to empirical values ​​or theoretical calculation values.

[0093] In the above step S4, the magnetic field is generated by the magnetic field generating device according to preset magnetization parameters. The magnetization parameters may be, for example, parameters such as current and / or voltage, which may be preset according to empirical values ​​or theoretically calculated values.

[0094] In order to make the magnetized magnet part 10 and the non-magnetic part 11 have higher dimensional accuracy and improve the quality of the magnetized magnetic part 1, the magnetized part 1a can be magnetized twice or more. Specifically, the integrated magnetization method also includes the following steps:

[0095] S5. Measure the parameter value of the magnetized member 1a;

[0096] S6. Determine whether the measured parameter value is within the allowable error range. If not, first adjust the magnetization parameter of the magnetic field generating device according to the measured parameter value, and then generate a magnetic field by the magnetic field generating device to magnetize the second part of the magnetized member 1a;

[0097] S7. Repeat steps S5 and S6 until the measured parameter value is within the allowable error range.

[0098] Obviously, when the measured parameter value is within the allowable error range, the magnetization is completed.

[0099] In step S5, the magnetized piece 1a can be taken out first and then measured to make the measurement more convenient. The parameter value can be, for example, the surface magnetism size of each area of ​​the magnetic piece 1 formed after the magnetized piece 1a, the position, thickness and other dimensional parameters of the magnetic part 10 and the non-magnetic part 11. Preferably, the surface magnetism size is tested by a programmable surface magnetism tester; the dimensional parameters such as the width and relative position of the magnetic part 10 and the non-magnetic area 11 are tested by touching the magnetic fluid with an image projector.

[0100] In step S6, the magnetization parameters may be, for example, the relative position of the magnetic field generating device along the axis 16 of the part 1a to be magnetized, the radial distance between the magnetic field generating device and the part 1a to be magnetized, and the current and voltage passed into the magnetic field generating device during magnetization. The magnetization parameters may be adjusted accordingly according to the measured parameter values ​​so that the quality of the formed magnetic part 1 is better. For example, if the measured surface magnetism value is too small, the magnetization parameters such as the current and / or voltage of the magnetic field generating device may be increased so that a larger surface magnetism can be obtained during the re-magnetization; if the measured non-magnetic part 11 is too thick, the positions of the two magnetic field generating devices on both sides of the non-magnetic part 11 may be adjusted so that the two magnetic field generating devices are close to each other, and the magnetic conductive sleeve 31 with a smaller thickness may be replaced as appropriate so that the thickness of the non-magnetic part 11 becomes smaller after the re-magnetization.

[0101] The above-mentioned integrated magnetization method can conveniently manufacture the magnetic component 1 , and the magnetic part 10 and the non-magnetic part 11 of the obtained magnetic component 1 have high dimensional accuracy, and the magnetic field strength can also be reliably guaranteed.

[0102] The above is only a specific implementation of the present invention, and any improvements made based on the concept of the present invention are deemed to be within the protection scope of the present invention.

Claims

1. A magnetic component, characterized in that: include: at least two magnet portions (10), each magnet portion (10) comprising two magnetic poles; and A non-magnetic portion (11) is provided between two adjacent magnetic portions (10), the magnetic poles of the magnetic portion (10) and the non-magnetic portion (11) are provided along the axis of the magnetic member (1), and the polarities of the adjacent two magnetic poles of the two adjacent magnetic portions (10) are the same; The magnetic component (1) is an integrated component.

2. The magnetic member according to claim 1, wherein: The outer peripheral surface of the magnetic member (1) is provided with a groove (13); The groove (13) is annular and is arranged around the outer peripheral surface of the magnetic component (1); Alternatively, the outer peripheral surface of the magnetic member (1) includes a plurality of side surfaces (14), and at least one of the side surfaces (14) is provided with the groove (13).

3. The magnetic member according to claim 2, wherein: The groove (13) is only provided on the outer peripheral surface of the non-magnetic portion (11); or, The groove (13) is only provided on the outer peripheral surface of the magnet portion (10); or, The groove (13) simultaneously covers at least a portion of the magnet portion (10) and at least a portion of the non-magnetic portion (11).

4. The magnetic member according to claim 2, wherein: The extending direction of the groove (13) is perpendicular to the axis (16) of the magnetic member (1).

5. The magnetic member according to claim 1, wherein: The thickness of the non-magnetic portion (11) is greater than 0.3 mm.

6. The magnetic member according to claim 1, wherein: The maximum value of the thickness of the non-magnetic portion (11) is smaller than the minimum value of the thickness of any one of the magnetic portions (10).

7. The magnetic member according to any one of claims 1 to 6, characterized in that: There is a smooth transition between the magnetic portion (10) and the non-magnetic portion (11).

8. The magnetic member according to any one of claims 1 to 6, characterized in that: The cross-sectional shapes at both ends of the magnetic member (1) are the same, and the cross-sectional shapes at both ends of the magnetic member (1) are different from the cross-sectional shape of the middle portion of the magnetic member (1).

9. The magnetic member according to any one of claims 1 to 6, characterized in that: The cross section of the magnetic member (1) perpendicular to its axis (16) is circular or polygonal.

10. A vibration device, characterized in that: The invention comprises a magnetic member (1) as claimed in any one of claims 1 to 9.

11. The vibration device according to claim 10, wherein It also includes a shell (2), a coil (20) arranged in the shell (2), and a spring (21) connected between the magnetic part (1) and the shell (2); the magnetic part (1) is arranged in the coil (20), and the gap between the inner wall of the coil (20) and the outer wall of the magnetic part (1) is 0.05 mm to 0.6 mm.

12. The vibration device according to claim 11, wherein The gap between the inner wall of the coil (20) and the outer wall of the magnetic member (1) is 0.15 mm to 0.3 mm.

13. The vibration device according to any one of claims 11 to 12, characterized in that The coil (20) is arranged around the outer periphery of the non-magnetic portion (11), and the height of the coil (20) is greater than or equal to the thickness of the non-magnetic portion (11).

14. The vibration device according to claim 13, wherein The height of the coil (20) is greater than the thickness of the non-magnetic portion (11); the non-magnetic portion (11) is symmetrical about a second symmetry plane in its thickness direction; and the coil (20) is symmetrical about the second symmetry plane.

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