Split mounting type modularized electromagnet magnetic loop system with adjustable magnetic circuit

Abstract

The utility model provides an assembly type modularized electromagnet magnetic loop system with an adjustable magnetic circuit. The assembly type modularized electromagnet magnetic loop system comprises a plurality of electromagnet modules; a transmitting end module and a magnetic loop group; the transmitting end module is arranged at the near working magnetic field end of the electromagnet module; and the magnetic loop group is arranged at the far working magnetic field end of the electromagnet module and is connected with different electromagnet modules. Aiming at the application in a magnetic navigation system, the external parts of the two electromagnet iron cores are connected to promote magnetic field concentration, the intensity of a central magnetic field is increased when the same current is introduced, and the over-temperature risk is reduced; moreover, the electromagnet and the magnetic loop are modularized, the application range of the electromagnet is expanded in a random combination mode, and a certain module can be replaced or the length of the magnetic loop can be changed to adjust the magnetic field; in addition, compared with an integrated structure, the assembly type modularized electromagnet magnetic loop system is convenient to disassemble and transport.

Description

Technical Field

[0001] The utility model relates to the technical field of medical magnetic navigation systems, in particular to an assembled modular electromagnet magnetic circuit system with adjustable magnetic circuits. Background Art

[0002] An electromagnet is a device that wraps a wire around the outside of an iron core and forms a magnetic field when the wire is energized. When the coil is energized, the closed path formed by the magnetic flux is the magnetic circuit. The iron core of a traditional electromagnet is usually made into a bar or horseshoe shape. The iron core and coil of the electromagnet are fixed, and the size and direction of the magnetic field can only be changed by changing the current. This type of electromagnet is used in a magnetic navigation system. The magnetic field at the center is weak, the magnetic field is dispersed, and the magnetic circuit is difficult to control. To achieve a high field strength at a certain point in space, simply increasing the current not only causes the coil temperature to rise, but also limits the space for the magnetic field to rise. The magnetic circuit design is single, and the electromagnet is subject to many space restrictions during use, resulting in a single use scenario for the electromagnet.

[0003] In recent years, magnetic navigation technology has emerged in the medical field and has become the focus of medical research. Through magnetic field sensors and control systems, magnetic navigation technology can play a key role in interventional surgery, cardiovascular surgery, neurosurgery, and treatment guided by magnetic resonance imaging. In interventional surgery, implanting magnetic sensors or applying controllable magnetic fields enables doctors to navigate and locate navigation targets in real time, improving the accuracy of surgery. In cardiovascular surgery, magnetic navigation technology provides higher accuracy and flexibility for catheter insertion and cardiovascular operations. In neurosurgery, magnetic navigation technology is essential for accurately positioning and guiding surgical tools, especially when dealing with complex neural structures and achieving minimally invasive surgery. In addition, magnetic navigation technology also plays a key role in treatment guided by magnetic resonance imaging, ensuring accurate positioning and monitoring of treatment targets. In general, magnetic navigation technology provides higher navigation accuracy and real-time performance for medical practice, which is of great significance for improving surgical safety, accuracy, and expanding the scope of application of non-invasive surgery. Against this background, medical navigation systems based on magnetic navigation technology have emerged, aiming to overcome the limitations of traditional medical navigation systems and bring greater innovation and progress to the medical industry.

[0004] At present, magnetic navigation technology mainly uses permanent magnet navigation, which is widely used in environments with long working distances. However, permanent magnets are large in size, and larger magnets are usually required to achieve the target magnetic field strength, which may cause the magnetic field strength to be too high at close range, and have an unignorable impact on other surrounding equipment. In order to reduce interference with the surrounding environment, recent solutions include using electromagnets to replace permanent magnets. In the case of power failure during non-working hours, electromagnets are not magnetic, which effectively reduces potential interference with the environment. However, electromagnets also face some challenges in practical applications. First, electromagnets have the problem of magnetic field saturation, especially under the influence of the iron core, resulting in the magnetic field strength not being unlimited. This limits the magnetic field strength of a single electromagnet's symmetry center to not directly reach the expected standard, and additional means may be required to enhance its performance. Secondly, electromagnets usually need to be fixed during use, which makes the electromagnet only suitable for specific fixed occasions. This fixity brings some limitations, because for applications in different scenarios, it may be necessary to purchase or customize electromagnets of different specifications, resulting in a certain degree of capital waste. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to flexibly change the size and direction distribution of the electromagnet's iron core to adapt to the changing environment of the operating room and reduce the equipment production cost; in view of this, the utility model provides an assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit.

[0006] The technical solution adopted by the utility model is an assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit, comprising:

[0007] Multiple electromagnet modules;

[0008] A transmitting end module is arranged at the end of the electromagnet module close to the working magnetic field;

[0009] The magnetic circuit group is arranged at the far working magnetic field end of the electromagnet module and is connected to different electromagnet modules.

[0010] In one embodiment, the magnetic circuit group includes:

[0011] A radial guide module, one end of which is connected to the far working magnetic field end of the electromagnet module;

[0012] An axial guide module, vertically connected to the other end of the radial guide module;

[0013] The extension module is arranged between the axial guide modules corresponding to different electromagnet modules.

[0014] In one embodiment, the inner end surface of the extension module is configured to be Z-shaped, C-shaped or S-shaped to achieve connection between the axial guide modules.

[0015] In one embodiment, the magnetic circuit assembly further comprises:

[0016] The conversion module is arranged between the extension modules corresponding to the plurality of the electromagnet modules, so that the extension modules are connected.

[0017] In one embodiment, the conversion module includes:

[0018] Cross adapter, I-beam adapter, triangle adapter.

[0019] By adopting the above technical solution, the utility model has at least the following advantages:

[0020] The embodiment of the utility model is aimed at the application in the magnetic navigation system, and the two electromagnet cores are externally connected to promote the concentration of the magnetic field, increase the intensity of the central magnetic field under the same current, and reduce the risk of overheating;

[0021] The utility model modularizes the electromagnet and the magnetic circuit, and expands the application range of the electromagnet by any combination, replaces a certain module or changes the length of the magnetic circuit to adjust the magnetic field. In addition, the assembled modular electromagnet magnetic circuit system is easier to disassemble and transport than the structure manufactured as an integrated structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit according to the utility model;

[0023] Figure 2 It is a structural schematic diagram of another assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit according to the utility model;

[0024] Figure 3 Schematic diagram of the distribution of magnetic flux lines at the connection point according to the center points of different connection end surfaces of the utility model;

[0025] Figure 4 It is a schematic diagram according to an embodiment of the utility model (the conversion module is a cross conversion head);

[0026] Figure 5 It is a schematic diagram according to an embodiment of the utility model (the conversion module is an I-shaped conversion head);

[0027] Figure 6 A schematic diagram according to an embodiment of the present invention (the conversion module is a triangular conversion head).

[0028] Reference numerals

[0029] 1-transmitter module, 2-electromagnet module, 3-radial guide module, 4-axial guide module, 5-extension module, 6-conversion module (cross conversion head), 7-conversion module (I-shaped conversion head), 8-conversion module (triangular conversion head). DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0032] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, wholes, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, parts and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0033] As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation, not degree, and are intended to account for the inherent variations in measurements or calculations that would be recognized by those of ordinary skill in the art.

[0034] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] The utility model embodiment provides an assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit, comprising:

[0037] A plurality of electromagnet modules 2;

[0038] The transmitting end module 1 is arranged at the end close to the working magnetic field of the electromagnet module 2;

[0039] The magnetic circuit group is arranged at the far working magnetic field end of the electromagnet module 2 and is connected to different electromagnet modules 2 .

[0040] In one embodiment, the magnetic circuit group includes:

[0041] A radial guide module 3, one end of which is connected to the far working magnetic field end of the electromagnet module 2;

[0042] An axial guiding module 4 is vertically connected to the other end of the radial guiding module 3;

[0043] The extension module 5 is arranged between the axial guide modules 4 corresponding to different electromagnet modules 2 .

[0044] In one embodiment, the inner end surface of the extension module 5 is set to a Z shape, a C shape or an S shape to achieve the connection between the axial guide modules, while increasing the contact surface between the guide modules and reducing the loss in the magnetic conduction process.

[0045] In one embodiment, the magnetic circuit group further includes: a conversion module, which is arranged between the extension modules corresponding to the plurality of the electromagnet modules, so that a connection is established between the extension modules.

[0046] In one embodiment, the conversion module includes: a cross conversion head 6 , an I-shaped conversion head 6 , and a triangle conversion head 8 .

[0047] The following is combined with Figures 1 to 6 , the structure of the utility model is described in detail.

[0048] like Figure 1 As shown, the magnetic circuit system includes a plurality of transmitting end modules 1 for guiding the working magnetic field, a plurality of electromagnet modules 2 for generating the magnetic field and an external magnetic circuit for collecting and guiding the magnetic field; each electromagnet module 2 is connected to the transmitting end module 1 on the side close to the working magnetic field, and is connected to the external magnetic circuit on the other side; the other side of each transmitting end module 1 is suspended in the air as a transmitting surface of the working magnetic field, and various forms of electromagnet magnetic circuit systems can be combined by adjusting the number and relative position layout of the transmitting end modules 1 and the splicing method of the external magnetic circuit. The magnetic circuit system can be customized according to actual needs through the modular magnetic circuit system. For example, the number and position of the transmitting end modules 1 and the electromagnet modules 2 can be arranged according to the requirements of the working magnetic field and the limitations of the working space, and then according to the position of the electromagnet module 2 and the space limitations around the electromagnet module 2, through the modular design of the magnetic circuit, a suitable magnetic circuit can be customized according to the space requirements to achieve the most ideal working magnetic field.

[0049] The magnetic circuit is mainly composed of multiple groups of external magnetic circuit groups arranged in space, each group of external magnetic circuit groups is mainly composed of radial guide modules 3, axial guide modules 4 and several extension modules 5 connected in sequence, and the external magnetic circuit of some combined forms also includes a conversion head; each external magnetic circuit group is connected through an extension module 5 or a conversion head; Figure 2 As shown, the matching connection between each radial guide module, axial guide module and extension module can be designed according to the relative position between the two electromagnet modules, and the axial length of the external magnetic circuit can be increased or decreased by the number of extension modules 5, thereby achieving an adjustable axial distance setting between the electromagnetic modules.

[0050] In this embodiment, the modules are detachably connected by screws, and the connection end surfaces between the modules are as follows: Figure 1 As shown, the end face between the axial guide module 4 and the extension module 5, as well as the internal end face of the extension module 5 are set to be Z-shaped, C-shaped, S-shaped and other mutually compatible special-shaped end faces. The modules are connected through the special-shaped end faces. Compared with the straight connection end faces, on the one hand, the stability of the connection structure is increased, and on the other hand, the contact area between the two connection end faces is increased, thereby reducing the flux loss at the end face connection.

[0051] like Figure 3 The figure shows the schematic diagram of the distribution of magnetic flux lines at the center points of three different connection end faces at the connection point. Figure A is a schematic diagram of the magnetic flux lines at the center point of the Z-shaped connection end face, Figure B is a schematic diagram of the magnetic flux lines of the S-shaped connection end face, and Figure C is a schematic diagram of the magnetic flux lines of the plane end face connection. The fan-shaped part is the leakage part of the magnetic flux lines of the connection end face. As shown in Figures A and B, since the cross-sectional area of ​​the connection end face is larger than that of the plane end face, most of the magnetic flux lines are reabsorbed by the connection end face, and only a few magnetic flux lines leak from the gaps in the connection end face; as shown in Figure C, it is a magnetic flux line distribution diagram of the center point of the conventional plane end face connection. Since the relative contact area of ​​the plane end face is small, only part of the magnetic flux lines are absorbed from the center point, and a large number of magnetic flux lines leak from both sides of the connection end face. The utility model increases the bordering area between the two modules by setting a special-shaped connection end face, avoids a large number of magnetic flux lines from being lost from the gaps in the connection surface, thereby improving the transmission effect of the magnetic flux lines and increasing the magnetic field strength of the working magnetic field.

[0052] Furthermore, the electromagnetic system is modularly configured, and the distance between the two electromagnetic modules 2 and the transmitting end module 1 is customized by extending the module 5 to achieve the most ideal working magnetic field; the utility model can configure multiple electromagnets to construct a magnetic field according to the magnetic field requirements by configuring different types of conversion connectors between the extension modules 5, such as Figure 4-6 Shown are top views of three types of multi-electromagnet module magnetic field generating devices.

[0053] like Figure 4As shown, the four electromagnet modules are arranged vertically relative to each other in pairs. The side of the electromagnet module 2 away from the central working magnetic field is connected to the vertically arranged radial guide module 3, and the bottom of the radial guide module 3 is connected to the axial guide module 4. The radial guide module 3 and the axial guide module 4 are arranged vertically, and the other end of the axial guide module 4 is connected to the conversion module (cross conversion head) 6. The conversion module 6 is provided with four connection ports, which are respectively used to connect to the axial guide module 4. By customizing the number and orientation of the connection ports of the conversion connector, different magnetic field generation systems can be constructed; Figure 3 The figure shows a cross-shaped electromagnet magnetic circuit magnetic field generating device, wherein the four electromagnets are arranged opposite to each other in the same plane and are perpendicular to each other, and the external magnetic circuit is respectively formed by a radial guide module, an axial guide module and a cross conversion head module, thereby forming a concentrated working magnetic field at the center position above the cross conversion head module;

[0054] like Figure 5 The figure shows another arrangement mode of four electromagnets constituting a working magnetic field. The four electromagnet modules are arranged in parallel with each other in pairs. The electromagnet modules are connected to the radial guide module 3 in the direction of the working magnetic field. The other end of the radial guide module 3 is vertically connected to the axial guide module 4. The other end of the axial guide module 4 is connected to the conversion module (I-shaped conversion head) 7. The connection port of the conversion module 7 is arranged on two opposite sides. In order to facilitate the change of the I-shaped electromagnet magnetic circuit, the I-shaped conversion module 7 is segmented into two, which are connected by an extension module 5 in the middle. The four electromagnet modules are connected to the two sides of the I-shaped conversion module 7 through the radial guide module and the axial guide module, respectively, to form an I-shaped electromagnet magnetic circuit magnetic field.

[0055] Different working magnetic fields can be constructed by setting different types of conversion connectors, such as Figure 6 As shown, the conversion connector is a conversion module (triangular conversion head) 8, the triangular conversion module 8 is in the shape of a triangular prism, and the connection ports are respectively arranged on the three sides of the triangular prism, and the axial guide module, the radial guide module and the electromagnet module are respectively installed on the three sides of the triangular prism-shaped conversion connector of the conversion connector 8, forming a Figure 6 The magnetic field of the triangular electromagnet magnetic circuit is shown.

[0056] The above three structures are only three special embodiments. The utility model can be customized to construct the external magnetic circuit of the working magnetic field according to other working requirements. As shown in the following figure, when other equipment is set below the working magnetic field, for example, it is necessary to construct a working magnetic field on the operating table in the operating room, and it is impossible to set the magnetic circuit below the working magnetic field according to the traditional method. In the above case, the external magnetic circuit can be reorganized by each module or adapted to the right-angle radial guide module 3 to achieve the purpose of avoiding obstacles around the electromagnet; as shown in the following figure, they are the main view and left view of the above magnetic circuit setting, respectively. The electromagnet module 2 is connected to the axial guide module through the right-angle radial guide module 3. The magnetic circuit can be freely designed according to the working space environment, and can be adapted to more working environments. The optimal magnetic circuit is obtained through modular magnetic circuit design in a specific space environment to maximize the magnetic field strength of the working magnetic field.

[0057] Compared with the prior art, this embodiment has at least the following advantages:

[0058] 1) The electromagnetic magnetic field of the utility model is concentrated, and the current in the central area to reach the target field strength is smaller, and it is not easy to overheat.

[0059] 2) The magnetic circuit of the utility model can be assembled in sections, which is more convenient for disassembly and transportation compared to an integrated structure.

[0060] 3) The magnetic circuit of the utility model can flexibly avoid external obstacles and be connected without being disturbed by space.

[0061] 4) The magnetic circuit of the utility model can be directly placed on the ground, which is beneficial for supporting and fixing the electromagnet.

[0062] 5) Each assembly module of the utility model has good replaceability. If a single module is damaged, it can be manufactured and purchased separately, and the maintenance cost is low.

[0063] Through the description of the specific implementation methods, a deeper and more specific understanding of the technical means and effects adopted by the present invention to achieve the predetermined purpose should be obtained. However, the accompanying drawings are only for reference and illustration purposes and are not used to limit the present invention.

Claims

1. An assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit, characterized in that: include: Multiple electromagnet modules; A transmitting end module is arranged at the end of the electromagnet module close to the working magnetic field; The magnetic circuit group is arranged at the far working magnetic field end of the electromagnet module and is connected to different electromagnet modules.

2. The assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit according to claim 1, characterized in that: The magnetic circuit group comprises: A radial guide module, one end of which is connected to the far working magnetic field end of the electromagnet module; An axial guide module, vertically connected to the other end of the radial guide module; The extension module is arranged between the axial guide modules corresponding to different electromagnet modules.

3. The assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit according to claim 2, characterized in that: The inner end surface of the extension module is configured to be Z-shaped, C-shaped or S-shaped to achieve the connection between the axial guide modules.

4. The assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit according to claim 2, characterized in that: The magnetic circuit group also includes: The conversion module is arranged between the extension modules corresponding to the plurality of the electromagnet modules, so that the extension modules are connected.

5. The assembled modular electromagnet magnetic circuit system with adjustable magnetic circuit according to claim 4, characterized in that: The conversion module comprises: Cross adapter, I-beam adapter, triangle adapter.

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