RU2110294C1 - Magnetotherapy device - Google Patents

Abstract

FIELD: medical engineering. SUBSTANCE: device has coils of variable magnetic field sources and constant magnetic field sources positioned in body sequentially with alternating polarity around common axis and facing the operating surface of body. Variable magnetic field sources include inductance coils connected inductively in pairs through ferromagnetic cores. They are connected to power supply source in series aiding. In addition, device is provided with infra-red radiation source positioned with its radiating section towards operating surface of body coaxially with common axis. Power supply source is made for developing the AC or pulsating output voltage of positive or negative polarity. EFFECT: reduced time of procedures. 11 cl, 19 dwg

Description

 The invention relates to medical equipment, namely to physiotherapeutic devices that form magnetic fields of complex configuration.

 Magnetotherapy is one of the earliest areas in physiotherapy. This allowed medicine to get quite a lot of practical material, confirming its effectiveness, and form a direction for harmonious use in combination with modern treatment methods. In particular, it was reliably revealed that the combination of fields created by permanent magnets and inductors in the form of inductors leads to the fastest and most stable remission in a number of pathologies, the main of which are violations in the musculoskeletal system (RU, N 2045967, class A 61 N 2/00, 1995).

 A device for magnetotherapy, containing inductors located on a common ferromagnetic core, and a permanent magnet located between the coils (RU, N 2012385, class A 61 N 2/04, 1994). This device allows you to generate a complex magnetic field, consisting of a combination of constant and alternating magnetic fields. However, the generated magnetic field is not localized in a limited space, which complicates the treatment, since healthy tissues surrounding the pathology zone are exposed.

 The closest technical solution is a device for magnetotherapy containing sources of a constant magnetic field arranged in the form of permanent magnets arranged in a case around a common axis in the form of permanent magnets, and sources of an alternating magnetic field are pairwise inductively coupled to each other by means of ferromagnetic cores oriented at an angle to the common axis are made in the form of inductors and connected to a power source (RU, N 2046609, class A 61 N 2/00, 1995). A feature of this device is the ability to supply a positive ripple, negative ripple, and alternating voltage from a power source. The inclusion of coils is such that at all poles formed by the cores, one polarity is formed: S or N. The magnetic field in the working part of the device is localized in the annular zone and pulsates in amplitude in the zones where the magnetic field sources are located. The configuration of the magnetic fields at positive, negative and alternating voltage is depicted in Figs. 1, 2 and 3, respectively, where solid lines show the localization regions of the magnetic fields.

 The expected technical result from the invention is to reduce the time of the procedure by increasing the uniformity of the distribution of dynamic magnetic fields in the local exposure zone.

 The expected technical result is achieved in that in a magnetotherapy device containing a power source providing an alternating voltage or pulsating voltage of positive or negative polarity at the output, alternating magnetic field sources and constant magnetic field sources arranged in a housing around the common axis are made in in the form of permanent magnets, sources of an alternating magnetic field include inductors, pairwise inductively coupled together stvom ferromagnetic cores, permanent magnets are mounted to a working surface of the housing in a sequence of alternating polarity, and inductors are connected in series to the power source and in accordance with.

 The device may contain an infrared radiation source mounted by the radiating part to the working surface of the housing coaxially with the common axis and connected to the power source.

 The poles of the sources of alternating magnetic fields can be installed perpendicular to the working surface of the housing.

 The radiating parts of the cores can be oriented radially relative to the common axis.

 The radiating parts of the cores can be made in the form of bevels facing acute angles to a common axis.

 The cores in the area of the radiating parts can be made with a bend.

 Parts of the cores on the outside of the common axis in the region of the radiating parts can be covered by short-circuited turns connected to the switches.

 Permanent magnets can be mounted with the ability to move and fix in the radial direction and in a direction parallel to the common axis.

 The device may contain an additional source of constant magnetic field in the form of a permanent magnet fixed in a spatial position lock.

 The latch can be made in the form of a handle with a socket for a permanent magnet.

 In this case, the latch can be made in the form of a bracket with a socket for a permanent magnet and a clip for attaching to the housing.

 In FIG. 1 schematically shows the configuration of the magnetic field of the prototype with a positive voltage of the power source; in FIG. 2 - configuration of the magnetic field of the prototype with a negative voltage of the power source; in FIG. 3 - configuration of the magnetic field of the prototype with alternating voltage of the power source; in FIG. 4 - view of the device from the working part; in FIG. 5 - arrangement of magnetic field sources in the housing; figure 6 is a functional electrical diagram of the device; in FIG. 7 - configuration of the magnetic field of the device with a positive voltage of the power source; on Fig - configuration of the magnetic field of the device with a negative voltage of the power source; in FIG. 9 - configuration of the magnetic field of the device with alternating voltage of the power source; in FIG. 10 - configuration of the magnetic field of the device with a positive voltage of the power source and the location of the sources of the alternating magnetic field from the inside; in FIG. 11 - configuration of the magnetic field of the device at negative voltage and the power source and the location of the alternating field sources from the inside; in FIG. 12 - configuration of the magnetic field of the device with an alternating voltage of the power source and the location of the alternating magnetic field sources from the inside; in FIG. 13 - the location of the magnetic field sources in the housing with three pairs of alternating magnetic field sources; in FIG. 14 is a cross section of the device when performing cores with a bevel; in FIG. 15 is a cross section of a device when performing cores with a bend; in Fig.16 is a cross section of the device in the presence of short-circuited turns; in FIG. 17 is a cross-sectional view of a device passing through permanent magnets; in FIG. 18 is a cross section of a superposition source with a permanent magnet; in FIG. 19 is a general view of a device with a superposition source.

 A device for magnetotherapy, according to the invention, contains (Fig. 4) a housing 1 made of a dielectric material, which ensures fixation of structural elements and their electrical isolation from the surface of the body. In the housing 1 around a common axis are, for example, four sources of a constant magnetic field 2,3,4,5, made in the form of permanent magnets from a ferromagnetic material, and four sources 6,7,8,9 of an alternating magnetic field in the form of coils 10, 11,12,13 inductance, which are pairwise inductively coupled to each other by means of ferromagnetic cores 14,15 made of a set of plates of transformer steel (figure 5). The coils 10,11,12,13 are connected to the power source 16 (Fig.6) so that when passing through them direct current poles 17,18,19,20 formed by the core 14 or core 15, have opposite polarities N and S For example, coils 10,11,12,13 can be connected to the source 16 in series and according to, which allows the use of a household electrical network as a source 16, since this inclusion of coils 10,11,12,13 ensures the use of the highest voltage source 16. Sources 2,3,4,5 form in the working part of the pole 21,22,23,24.

 The number of cores 14.15 can be more than two, for example, when a core 25 with coils 26.27 is inserted into the device, it is supplemented by sources 28.29, and poles 30.31 are formed (Fig. 13).

 Coaxial with the common axis can be installed source 32 of infrared radiation connected to the source 16.

 Poles 6,7,8,9,30,31 can be located parallel to the working surface 33, which is achieved, for example, either by skewing the core 14 at an angle of 34 (Fig. 14), or by bending it 35, for example, in the zone of the pole 7 (Fig. 15).

 Poles 6,7,8,9,30,31 can be oriented in the radial direction relative to the common axis, for example, by combining the longitudinal axis of the pole 6 with a radius 36 passing through the common axis (Fig.13).

 The outer parts of the cores 14.15, for example in the zone of 7.8, can be covered by short-circuited turns 37.38 connected to the switches 39.40 (Fig. 16).

 Sources 2,3,4,5,28,29 in the form of permanent magnets can be mounted with the ability to move and fix in the radial direction, for example, sources 2,4, are fixed by means of a strap 41 and a screw 42, and can also be moved in a direction parallel to common axis, for example by means of gaskets 43,44, due to changes in their thickness. Sources 2,4 with gaskets are placed in the grooves 45,46 (Fig.17).

 A superposition source 47 of a constant magnetic field, for example a permanent magnet, is fixed in the socket 48 of the spatial position lock, made, for example, in the form of a handle 49 or an arm 50 with a clip 51 for attachment to the housing (Fig. 18.19).

 A device for magnetotherapy works as follows.

 Consider the operation of the device with four sources of alternating magnetic field and four sources of constant magnetic field.

 At the output of the source 16, one of three current modes is formed, passing through the coils 10,11,12,13: an alternating sinusoidal frequency of 50-60 Hz, pulsating with a positive half-wave sinusoid, pulsating with a negative half-wave sinusoid.

 With the passage of a constant pulsating current through the coils 10.11 at the poles 6.7 of the core 14, opposite polarities of the magnetic field, respectively N and S, arise. Changing the polarity of the pulsating current passing through the coils 10.11 leads to a change in polarity at the poles 6.7 , respectively, S and N. Coils 12,13 work similarly, and the general connection of the coils 10,11,12,13 to the source 16 ensures that, for all modes of the current passing through them, the sequence of poles of polarity 6,7,8,9 when moving clockwise or counter clockwise be interleaved, for example N, S, N, S.

 Sources 2,3,4,5 are oriented to the working surface with their poles so that the total sequence of poles when moving in the clockwise or counterclockwise direction would be alternating, for example N, S, N, S, N, S, N, S . A schematic interaction of a given sequence of magnetic fields and, as a consequence of this, a change in their configuration is shown in Fig. 7, where dashed lines connect the imaginary centers of the poles 21,22,23,24. If there were no sources of 6,7,8,9 alternating magnetic fields, then the total field from the poles 21,22,23,24 would be distributed symmetrically with respect to the dashed lines.

 The magnetic field configuration at a given polarity of the current source 16, for example positive, is shown in Fig.7. It was determined by the distribution of indicator ferromagnetic particles, the distribution density of which is shown by solid lines.

 In addition to the existing poles 21,22,23,24, direct current creates poles 17,18,19,20. The propagation of the magnetic field of one permanent magnet, for example from the pole 21, will be more oriented towards the space between the poles 17.20, since they are opposite in sign, and to a lesser extent towards the pole 22, because the opposite pole 18 will prevent this. Ferromagnetic particles reflect this by localization on the outside of the dashed line, and their directivity corresponds to the direction of movement counterclockwise.

 The general picture of the magnetic field propagation represents four localization zones oriented in the counterclockwise direction of movement, and from the outside, relative to the zone bounded by lines connecting the imaginary centers of the poles of 21,22,23,24 permanent magnets. The resulting distribution can be characterized as a diverging pseudo-spiral with left spin, i.e., the magnetic field lines are imitated in the form of a diverging spiral.

 The interaction of the resulting total magnetic field with biological objects is characterized by the presence of a reaction in the tissues of the body, which will also be spatially oriented along a diverging spiral. This effect provides not only a local reaction in the tissues of the body, but also determines its global orientation, for example, from the center of the exposure zone, which is equivalent to the processes of dissimilation at the tissue level or catabolism at the organ level. The practical consequence of the influence of a field with a spiral orientation is to reduce the time of the procedure and obtain positive results in complex articular pathologies.

 Changing the polarity of the current source 16 to the opposite leads to a change in polarities in the pairs of poles 17.18 and 19.20. The configuration of the magnetic field after the polarity reversal is shown in Fig. 8 and differs from the previous one only in the orientation of the magnetic field density in the clockwise direction. The resulting distribution can be characterized as a diverging pseudo-spiral with a right spin.

 In the operating mode of the source 16, when an alternating current is generated at its output, the magnetic field distribution shown in Fig. 9 is obtained. Due to the fact that the polarities of the poles 17,18,19,20 change with the frequency of the alternating current, the ferromagnetic particles are uniformly distributed in the positive half wave of the current in the counterclockwise direction, and in the negative half wave of the current in the clockwise direction.

 The specific mode of exposure: positive, negative and alternating current is determined by the doctor based on the clinical situation and guidelines for the use of the device.

 A more accurate approximation of the impact zone in the form of a circle is achieved by increasing the number of pairs of sources of an alternating magnetic field and sources of a constant magnetic field. Complementing the device with a pair of sources 30.31 and sources 28.29, we obtain a sequence of six variables and six constant sources of magnetic field (Fig.13). The orientation of the longitudinal axis of the poles 6,7,8,9,30,31 allows you to get a symmetric distortion of the magnetic field of the sources 2,3,4,5,28,29 and, as a result, a symmetric picture of the distribution of the magnetic field relative to the common axis. The symmetric distribution of the total magnetic field relative to the common axis allows to increase the accuracy of localization of the exposure zone in the patient’s body.

 The source 32 of infrared radiation allows you to form a combined effect of two physiotherapeutic factors of deep penetration, which in a number of pathologies gives an additional therapeutic effect (Fig.6).

 If the poles 17,18,19,20 are located on the inner side of the lines connecting the imaginary centers of the poles of 21,22,23,24 permanent magnets, then the configuration of the total magnetic field can be described as a converging spiral with a right or left orientation, depending on the polarity of the source current 16. For positive, negative polarity and alternating current, the distribution of the magnetic field is shown in FIG. 10,11,12 respectively.

 Structurally, the placement of the poles 17,18,19,20 on the inner side of the lines connecting the imaginary centers of the poles 21,22,23,24 is achieved by making the radiating parts of the cores 14,15 with bevels, the acute angles of which are turned to the common axis (Fig. 14) , or by bending the parts of the cores 14.15 in the area of the radiating parts away from the common axis (Fig. 15). This embodiment allows the most structurally large elements-coils 10,11,12,13 to be located at the edges of the housing 1, which further improves their cooling mode. Performing a bevel in the 14.15 cores has practically no effect on the general direction of the magnetic field in the pole zone 6,7,8,9, since at the boundary of two media (ferromagnet-air) the magnetic field lines tend to occupy a vertical position to the radiating surface. This allows us to consider the configuration of the magnetic fields at the outputs of the 14.15 cores with bending and beveling approximately the same. Bent cores 14.15 made it possible to create a higher magnetic flux density than with the same bevel sources, since when bending the magnetic flux exits through a smaller area, therefore, such a structural embodiment is more preferable for creating strong magnetic fields.

 The creation of powerful sources 6,7,8,9 of an alternating magnetic field on the inner side of the lines connecting the imaginary centers of the poles 21,22,23,24 is achieved by using 37.38 short-circuited turns connected to the switches 39.40 ( Fig. 16). When the switches are closed, 39.40 parts of the cores 14.15 located on the outside from the common axis are covered by short-circuited turns 37.38, which create a magnetic flux opposite to the flow in the part of the cores not covered by short-circuited turns 37.38. This leads to the fact that basically the entire magnetic flux generated by 14.15 is emitted from parts not covered by turns 37.38, i.e. closer to the common axis, which facilitates the creation of powerful sources 6,7,8,9 located with the inner side of the lines connecting the imaginary centers of the poles 21,22,23,24.

 Using the device mode that creates the magnetic field configuration as a converging spiral creates a global orientation of the body's reaction to the center of the exposure zone, which is equivalent to assimilation processes at the tissue level or anabolism at the organ level. The practical application of this mode expands the methodological possibilities of using the device.

 Clinical studies have shown that the ratio of the intensity of a constant magnetic field and an alternating magnetic field significantly affects the therapeutic result. The tension ratio must be maintained with an accuracy of ± 7%. To establish a predetermined ratio in the manufacture of the device allows the implementation of sources 2,3,4,5 in the form of permanent magnets installed, for example, in grooves 45,46 with the possibility of their radial movement and fixed by means of a strap 41 and a screw 42. Adjusting the movement of sources 4,2 in the direction parallel to the common axis, achieved by using gaskets 43,44 of different thicknesses.

 The effectiveness of treatment performed on the extremities increases with the use of an additional superposition source 47 of a constant magnetic field. Superposition source 47 may be made in the form of a spatial position fixer of a permanent magnet, consisting of a socket 48 connected to a handle 49 (Fig. 18). The limb is located between the working part 33 of the device and the superposition source 47. The fixation of the spatial arrangement of the magnet in the form of an arm 50 connected to the clamp 51 facilitates long-term magnetotherapy procedures.

 Thus, the device for magnetotherapy can reduce the time of the procedure by increasing the uniformity of the distribution of dynamic magnetic fields in the local impact zone by modeling the processes of interaction of the magnetic field with body tissues by type: assimilation-dissimilation, anabolism-catabolism.

Claims (11)

 1. A device for magnetotherapy, containing a power source that provides an alternating voltage or pulsating voltage of positive or negative polarity at the output, alternating magnetic field sources and constant magnetic field sources made in the form of permanent magnets, alternating sources, located in the housing around the common axis magnetic fields include inductors, pairwise inductively interconnected by means of ferromagnetic cores, characterized in the permanent magnets are mounted to a working surface of the housing in a sequence of alternating polarity, and inductors connected to the power source sequentially, and in concert.  2. The device according to claim 1, characterized in that it contains a source of infrared radiation mounted by the radiating part to the working surface of the housing coaxially with the common axis and connected to a power source.  3. The device according to claims 1 to 3, characterized in that the poles of the sources of variable magnetic fields are installed perpendicular to the working surface of the housing.  4. The device according to claims 1 to 3, characterized in that the radiating parts of the cores are oriented radially relative to the common axis.  5. The device according to PP.3 and 4, characterized in that the radiating parts of the cores are made in the form of bevels facing acute angles to a common axis.  6. The device according to PP.3 and 4, characterized in that the cores in the region of the radiating parts are made with a bend.  7. The device according to paragraphs. 1 - 6, characterized in that the parts of the cores on the outside from the common axis in the area of the radiating parts are covered by short-circuited turns connected to the switches.  8. The device according to claims 1 to 7, characterized in that the permanent magnets are mounted with the ability to move and fix in the radial direction and in a direction parallel to the common axis.  9. The device according to claims 1 to 8, characterized in that it contains an additional source of a constant magnetic field in the form of a permanent magnet fixed in a spatial position lock.  10. The device according to claim 9, characterized in that the latch is made in the form of a handle with a drive for a permanent magnet.  11. The device according to claim 9, characterized in that the latch is made in the form of a bracket with a socket for a permanent magnet and a clip for attaching to the housing.

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