CN113677180B

CN113677180B - High-precision medical equipment electromagnetic shielding shell

Info

Publication number: CN113677180B
Application number: CN202111224321.6A
Authority: CN
Inventors: 宋麦娟
Original assignee: Shenzhen Yunchuang Precision Medical Technology Co ltd
Current assignee: Shenzhen Yunchuang Precision Medical Technology Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-02-08
Anticipated expiration: 2041-10-21
Also published as: CN113677180A

Abstract

The invention discloses a high-precision medical equipment electromagnetic shielding shell, which comprises an outer shell; all fixed mounting has two micro heater on six faces in the outer shell outside, the inner chamber of outer shell is provided with the inlayer shell, form the electromagnetic shield chamber between outer shell and the inlayer shell, equal fixed mounting has a plurality of reflection welt all around of six faces in the inlayer shell outside. According to the invention, through the matched use of the data conversion module, the CAN bus module, the data storage module and the equipment module which are arranged in the outer shell, the power supply noise is reduced by adding the decoupling capacitor, the electromagnetic radiation magnitude is obviously reduced along with the increase of shielding measures, through the arrangement of the electromagnetic shielding part, the penetrating electromagnetic signal is absorbed, and the reflection lining plate also plays a role in reflecting the incident electromagnetic signal, so that the electromagnetic signal is almost completely isolated at the outer side of the inner shell.

Description

High-precision medical equipment electromagnetic shielding shell

Technical Field

The invention belongs to the technical field of electromagnetism, and particularly relates to a high-precision medical equipment electromagnetic shielding shell.

Background

Electromagnetism, one of the physical concepts, is a general term for the electric and magnetic properties of substances, such as electromagnetic induction, electromagnetic wave, etc., and it is discovered by the danish scientist oersted that the electromagnetic phenomenon is caused by the fluctuation of electric charge movement to form a magnetic field, so all the electromagnetic phenomena can not be separated from the electric field.

The high-precision equipment is affected by electromagnetic radiation in actual work, so that the problems of network crosstalk, data errors, electromagnetic noise leakage, electromagnetic interference, mutual electromagnetic interference among products and the like are caused.

Some existing precision devices may generate noise that may cause interference with sensitive electronic components in the electronic device, such as touch sensitive components, e.g., touch sensitive displays, and the electronic device may also generate unintended electromagnetic fields that may cause inefficient radio signal transmission.

Disclosure of Invention

The invention aims to provide a high-precision medical equipment electromagnetic shielding shell, which solves the technical problems that network crosstalk, data errors, electromagnetic noise leakage, electromagnetic interference, mutual electromagnetic interference among products and the like can be caused by the influence of electromagnetic radiation in the actual work of high-precision equipment, and the noise can be generated by some existing precision equipment, can cause interference on sensitive electronic components in electronic equipment such as touch sensitive components like touch sensitive displays, and can also generate unexpected electromagnetic fields by the electronic equipment, so that the transmission efficiency of radio signals can be low.

The technical scheme for solving the technical problems is as follows: the high-precision medical equipment electromagnetic shielding shell comprises an outer shell; the utility model discloses a heating device, including outer shell, inner shell, outer shell, heating assembly, electromagnetic shield, heating assembly, outer shell, inner shell, outer shell and inner shell, equal fixed mounting has two micro heater on six faces in the outer shell outside, the inner chamber of outer shell is provided with the inner shell, form the electromagnetic shield chamber between outer shell and the inner shell, equal fixed mounting has a plurality of reflection welt all around of six faces in the inner shell outside, equal fixed mounting has the electromagnetic shield on six faces in the inner shell outside, reflection welt on every face of inner shell is around the electromagnetic shield setting, all be provided with heating element on every edges and corners in the inner shell outside, heating element's fixed surface installs the installation buckle, heating element passes through installation buckle fixed mounting on the electromagnetic shield, the outside fixed connection of installation buckle is on the inner wall of outer shell, is provided with heat-conducting component between the adjacent three heating element, one side fixedly connected with connecting strip of heat-conducting component, one end of each two connecting strips parallel to the micro heater penetrates through the outer side of the outer shell and is fixedly connected with one micro heater.

Preferably, the electromagnetic shielding part comprises a mounting box detachably mounted on the inner wall of the outer shell, a driver board is arranged on one side of the inner cavity of the mounting box, a first transmitter coil is embedded in the center of one side of the driver board, and a second transmitter coil is embedded in four corners of one side of the driver board, which is provided with the first transmitter coil.

Preferably, the inner cavity of the mounting box is provided with a protective cover plate positioned on one side of the driver plate, and the inner cavity of the mounting box is provided with a sealing cover plate positioned on one side of the protective cover plate.

Preferably, the center of one side of the driver board is provided with a first mounting groove matched with the first transmitter coil, and four corners of one side of the driver board are provided with second mounting grooves matched with the second transmitter coil.

Preferably, the heating assembly comprises a heat conduction shell fixedly connected to the inner side of the installation buckle plate, a mounting block is fixedly connected to a concave part on one side of an inner cavity of the heat conduction shell, and a plurality of first heat conduction strips are inserted into one side of the mounting block.

Preferably, a first heat conducting coil is welded at the top ends of two adjacent first heat conducting strips, a plurality of second heat conducting strips are welded at the top of the first heat conducting coil, and a second heat conducting coil is welded at the top of the second heat conducting strips.

Preferably, the heat conducting assembly comprises an insulating sleeve, a first conducting rod, a second conducting rod and a third conducting rod are inserted into the surface of the insulating sleeve, one end of the connecting strip is inserted into the insulating sleeve, and an insertion hole matched with the connecting strip is formed in the surface of the insulating sleeve.

Preferably, one end of the first conducting rod, one end of the second conducting rod and one end of the third conducting rod are respectively inserted into the corresponding mounting blocks, and one end of the connecting strip, one end of the first conducting rod, one end of the second conducting rod and one end of the third conducting rod are all connected together in the insulating sleeve.

Preferably, the outer side of each reflecting liner plate is provided with an inward concave cambered surface.

1. The invention has the beneficial effects that: in the invention, through the matching use of the data conversion module, the CAN bus module, the data storage module and the equipment module which are arranged in the outer shell, the power noise is reduced by adding the decoupling capacitor, the electromagnetic radiation magnitude is obviously reduced along with the increase of the shielding measure, the effectiveness of the measures is reflected, the penetrating electromagnetic signal is absorbed through the arrangement of the electromagnetic shielding piece, and the reflection lining plate also plays a role of reflecting the incident electromagnetic signal, so that the electromagnetic signal is almost completely isolated at the outer side of the inner shell, thereby the precise instrument in the shell is not influenced by the electromagnetism, the high-precision medical equipment electromagnetic shielding shell is used for solving the problems that the high-precision equipment is influenced by the electromagnetic radiation in the actual work, thereby causing network crosstalk, data error, electromagnetic noise leakage, electromagnetic interference, mutual electromagnetic interference among products and the like, some existing precision devices generate noise that can cause interference with sensitive electronic components in the electronic device, such as touch sensitive components, e.g., touch sensitive displays, and the electronic device can also generate unintended voltages that can cause technical problems with inefficient radio signal transmission.

Drawings

The above and/or other advantages of the invention will become more apparent and more readily appreciated from the following detailed description taken in conjunction with the accompanying drawings, which are given by way of illustration only and not by way of limitation, and in which:

FIG. 1 is a schematic diagram of one embodiment of the present invention;

FIG. 2 is a schematic exploded view of an embodiment of the present invention;

FIG. 3 is a perspective view of a heating assembly according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a heating assembly according to an embodiment of the present invention;

FIG. 5 is a perspective view of a heat conducting assembly according to an embodiment of the present invention;

fig. 6 is an exploded perspective view of an electromagnetic shield according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of the interior of an outer shell according to one embodiment of the invention;

FIG. 8 is a schematic diagram of decoupling capacitors and power supply noise according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating the application of shielding and electromagnetic radiation levels in accordance with one embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the heating device comprises an outer shell, 2, a micro heater, 3, an electromagnetic shielding part, 4, an inner shell, 5, a reflecting lining plate, 6, a heating component, 7, an installation buckle plate, 8, a heat conduction component, 9, a connecting strip, 61, a heat conduction shell, 62, an installation block, 63, a first heat conduction strip, 64, a first heat conduction coil, 65, a second heat conduction strip, 66, a second heat conduction coil, 81, an insulation sleeve, 82, a plug hole, 83, a first electric conduction rod, 84, a second electric conduction rod, 85, a third electric conduction rod, 31, an installation box, 32, a driver plate, 33, a first transmitter coil, 34, a second transmitter coil, 35, a protection cover plate, 36, a sealing cover plate, 37, a first installation groove, 38 and a second installation groove.

Detailed Description

Hereinafter, embodiments of the electromagnetic shield case for a high-precision medical device of the present invention will be described with reference to the accompanying drawings.

The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.

Fig. 1-9 illustrate a high-precision medical device electromagnetic shield case according to an embodiment of the present invention, including an outer shell 1; the heating device comprises an outer shell 1, an inner shell 4, an electromagnetic shielding cavity formed between the outer shell 1 and the inner shell 4, a plurality of reflecting lining plates 5 fixedly arranged around the six outer surfaces of the inner shell 4, electromagnetic shielding parts 3 fixedly arranged on the six outer surfaces of the inner shell 4, the reflecting lining plates 5 on each surface of the inner shell 4 surround the electromagnetic shielding parts 3, heating components 6 are arranged on each corner angle on the outer side of the inner shell 4, a mounting buckle 7 is fixedly arranged on the surface of each heating component 6, each heating component 6 is fixedly arranged on the electromagnetic shielding part 3 through the mounting buckle 7, the outer side of each mounting buckle 7 is fixedly connected to the inner wall of the outer shell 1, heat conducting components 8 are arranged between every two adjacent heating components 6, and a connecting strip 9 is fixedly connected to one side of each heat conducting component 8, one end of each two connecting strips 9 parallel to the micro heater 2 penetrates through the outer side of the outer shell 1 and is fixedly connected with one micro heater 2, the electromagnetic shielding part 3 comprises a mounting box 31 which is detachably mounted on the inner wall of the outer shell 1, one side of the inner cavity of the mounting box 31 is provided with a driver plate 32, a first transmitter coil 33 is mounted in the center of one side of the driver plate 32 in an embedded manner, two transmitter coils 34 are mounted in four corners of one side of the driver plate 32, where the first transmitter coil 33 is mounted, the inner cavity of the mounting box 31 is provided with a protective cover plate 35 positioned on one side of the driver plate 32, the inner cavity of the mounting box 31 is provided with a sealing cover plate 36 positioned on one side of the protective cover plate 35, the center of one side of the driver plate 32 is provided with a first mounting groove 37 matched with the first transmitter coil 33, and four corners of one side of the driver plate 32 are provided with second mounting grooves 38 matched with the second transmitter coils 34, the heating assembly 6 comprises a heat conduction shell 61 fixedly connected to the inner side of the mounting buckle 7, a mounting block 62 is fixedly connected to a concave position on one side of an inner cavity of the heat conduction shell 61, a plurality of first heat conduction strips 63 are inserted into one side of the mounting block 62, a first heat conduction coil 64 is welded at the top end of each of two adjacent first heat conduction strips 63, a plurality of second heat conduction strips 65 are welded at the top of the first heat conduction coil 64, a second heat conduction coil 66 is welded at the top of each of the plurality of second heat conduction strips 65, the heat conduction assembly 8 comprises an insulating sleeve 81, a first conductive rod 83, a second conductive rod 84 and a third conductive rod 85 are inserted into the surface of the insulating sleeve 81, one end of each connecting strip 9 is inserted into the insulating sleeve 81, an insertion hole 82 matched with the connecting strip 9 is formed in the surface of the insulating sleeve 81, one ends of the first conductive rod 83, the second conductive rod 84 and the third conductive rod 85 are respectively inserted into the corresponding mounting blocks 62, one ends of the connecting strip 9, the first conductive rod 83, the second conductive rod 84 and the third conductive rod 85 are connected together inside the insulating sleeve 81, the outer side of each reflecting lining plate 5 is provided with an inward concave cambered surface.

The electromagnetic shield 3 may be positioned along the direction of the magnetic flux, the electromagnetic shield 3 may be formed of an electrically conductive material, the electrically conductive material may be NiV, the electromagnetic shield 3 may have a thickness between 32 μm, the voltage generated on the electromagnetic shield 3 may be removed such that the voltage does not permanently remain on the electromagnetic shield 3, the voltage on the electromagnetic shield 3 may be discharged to ground, the electromagnetic shield 3 may thus be coupled to a ground connection to allow the voltage on the electromagnetic shield 3 to discharge to ground, the ground connection may be a ground ring or any other suitable electrically conductive structure coupled to ground that removes the voltage from the electromagnetic shield 3, the electromagnetic shield may be formed of a material with a high mutual inductance allowing between 90% and a mutual ACR of 11 ohms determined by the design constraints of the device, thus, an exemplary material that may be used to form the electromagnetic shield may include nickel vanadium NiV with a thickness in the range between 25nm, in particular embodiments, the electromagnetic shield is formed from NiV with a thickness of 45nm, and exemplary materials that may be used to form the receiver shield may include silver with a thickness in a range between 0.16 μm, and in particular embodiments, the receiver shield is formed from silver with a thickness of 0.2 μm.

The electromagnetic shielding terminal 4 comprises a data conversion module, a CAN bus module, a data storage module and an equipment module, wherein the data conversion module, the CAN bus module, the data storage module and the equipment module are all arranged in the installation shell in sequence from bottom to top, each module is independent and CAN generate electromagnetic radiation outwards, a shielding partition plate is arranged between the installation shell and the data conversion module, the thickness of the shielding partition plate is 5mm, no hole is formed in the shielding partition plate, the input end of a digital integrated circuit of the data conversion module, the CAN bus module, the data storage module and the equipment module is not suspended, the input end is connected with a pull-up resistor or a pull-down resistor of 15k omega, a decoupling capacitor of 0.15F is connected between a power supply and the ground of the integrated circuit of the data conversion module, the CAN bus module, the data storage module and the equipment module in parallel, and the capacitor of 0.08F is selected actually, after a decoupling capacitor is added into a product, the power supply noise is reduced, when the capacitance value is 0.08uF, the power supply noise is basically reduced to the lowest point, the capacitance is continuously increased, and the power supply noise basically has no reduction interval, so that a 0.08uF capacitor is selected, a filter circuit is added between a positive bus and a negative bus of a single chip microcomputer power supply of a CAN bus module, a printed board of the CAN bus module comprises a clock area and a data processing circuit, the clock area comprises a crystal oscillator and the single chip microcomputer, the wiring distance between the crystal oscillator of the clock area and a pin of the single chip microcomputer is 2mm, the clock area is isolated from the data processing circuit by using a ground wire, a shell of the crystal oscillator is grounded and fixed on the printed board of the CAN bus module, a power wire and a ground wire on the printed board of the data conversion module, the CAN bus module and the data storage and equipment module are widened, the width is 1.8mm, and the printed boards of the data conversion module, the CAN bus module and the data storage and equipment module use a three-layer board, the three-layer plate is sequentially provided with a stratum layer, a digital signal layer, an analog signal layer, slope step seams are arranged among the data conversion module, the data conversion module and the CAN bus module, and between the CAN bus module and the data storage and equipment module, an electromagnetic sealing gasket and a silicone grease conductive adhesive coating layer are added among the data conversion module, the data conversion module and the CAN bus module, and between the CAN bus module and the data storage and equipment module, the electromagnetic sealing gasket has 25% compression deformation, the decoupling capacitance connected in parallel between the power supply and the ground of the integrated circuit of the data conversion module, the CAN bus module and the data storage and equipment module is 0.06F, the model of a connector between printed boards is RM222-060-000-0256, internal buses used for power supply and communication among the data conversion module, the CAN bus module and the data storage and equipment module are connected through the connector between the printed boards, the direct connection of signals is realized, the data conversion module, the CAN bus module and the external connector of the data storage and equipment module are respectively assembled on the data conversion module, the CAN bus module and the data storage and equipment module by using conductive rubber pads, and the parts of the outer surfaces of the power module, the data conversion module, the CAN bus module and the data storage and equipment module, which are used for installing the connector, are subjected to conductive anodization and non-painting treatment, so that a sensitive module which is easy to be interfered is far away from the power module with relatively large electromagnetic radiation as possible, thereby realizing the electromagnetic shielding effect among internal systems, the A column represents that no shielding measure is adopted for a product, the B column represents that a shielding partition plate measure is added for the product, compared with the mode that no shielding partition plate is added, the electromagnetic radiation magnitude is reduced by 20 percent, the C column represents that measures of a step slope surface seam, an electromagnetic sealing gasket and a conductive rubber pad are added on the basis of the B column, the D column represents that measures of an internal bus are added on the basis of the C column, and along with the increase of shielding measures, the electromagnetic radiation magnitude level is obviously reduced, so that the effectiveness of the measures is reflected.

In actual use, an array of transmitter coils one 33 and two 34 coupled to the driver board 32 may be housed within an interior cavity of the mounting box 31, the transmitter coils one 33 and two 34 operable to generate a time-varying magnetic flux that propagates on an exterior surface of the sealing cover plate 36 to induce a current in the high precision device, and the driver board 32 may be a printed circuit board PCB configured to route signals and power for operating the transmitter coils one 33 and two 34.

Under the effect of heating element 6, whole shell can also produce high temperature high coil resistance big, and the coil current reduces, and magnetic force diminishes to make magnetic force diminish.

In summary, the following steps: the high-precision medical equipment electromagnetic shielding shell intercepts an electric field generated between a transmitter coil and a receiver coil during wireless power transmission by avoiding generating harmful voltage on the receiver coil or the transmitter coil of a wireless charging system during the wireless power transmission, prevents the transmitter coil from generating harmful voltage on the receiver coil during the wireless power transmission by intercepting the electric field, reduces the interference of power supply noise on a single chip microcomputer, enhances the shielding effect of external electromagnetic noise entering and internal electromagnetic noise leaking, realizes the effective transmission of power supply, digital signals and analog signals, reduces the crosstalk phenomenon of the signals, and solves the problem that the high-precision medical equipment is influenced by electromagnetic radiation during the actual work so as to cause network crosstalk, data error, electromagnetic noise leakage, The problems of electromagnetic interference and mutual electromagnetic interference between products occur, some existing precision devices generate noise, the noise can cause interference to sensitive electronic components in the electronic device, such as touch sensitive components, for example, a touch sensitive display, the electronic device can also generate unexpected voltage, and the technical problem of low transmission efficiency of radio signals can be caused.

The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention, so as to achieve the purpose of the invention.

Claims

1. The electromagnetic shielding shell of the high-precision medical equipment is characterized by comprising an outer shell (1); the utility model discloses a heating element, including outer shell (1), inner shell (4), electromagnetic shield chamber, reflection welt (5), electromagnetic shield spare (3) and heating element (6), equal fixed mounting has two micro heater (2) on six faces in outer shell (1) outside, the inner chamber of outer shell (1) is provided with inlayer shell (4), form the electromagnetic shield chamber between outer shell (1) and inlayer shell (4), equal fixed mounting has a plurality of reflection welt (5) all around of six faces in inlayer shell (4) outside, equal fixed mounting has electromagnetic shield (3) on six faces in inlayer shell (4) outside, reflection welt (5) on every face of inlayer shell (4) are around electromagnetic shield (3) setting, all be provided with heating element (6) on every edges and corners in the inlayer shell (4) outside, the fixed surface of heating element (6) installs installation buckle (7), heating element (6) are through installation buckle (7) fixed mounting on electromagnetic shield (3), the outer side of the installation buckle plate (7) is fixedly connected to the inner wall of the outer shell (1), a heat conducting assembly (8) is arranged between every two adjacent heating assemblies (6), one side of each heat conducting assembly (8) is fixedly connected with a connecting strip (9), and one end of each connecting strip (9) parallel to the micro heater (2) penetrates through the outer side of the outer shell (1) and is fixedly connected with the micro heater (2).

2. The high-precision medical equipment electromagnetic shielding shell according to claim 1, wherein the electromagnetic shielding part (3) comprises a mounting box (31) detachably mounted on the inner wall of the outer shell (1), a driver board (32) is arranged on one side of the inner cavity of the mounting box (31), a first transmitter coil (33) is embedded in the center of one side of the driver board (32), and a second transmitter coil (34) is embedded in the four corners of one side of the driver board (32) where the first transmitter coil (33) is mounted.

3. A high precision medical equipment electromagnetic shielding shell according to claim 2, characterized in that the inner cavity of the mounting box (31) is provided with a protective cover plate (35) on the side of the driver plate (32), and the inner cavity of the mounting box (31) is provided with a sealing cover plate (36) on the side of the protective cover plate (35).

4. The electromagnetic shielding shell for high-precision medical equipment according to claim 3, wherein a first mounting groove (37) matched with the first transmitter coil (33) is formed in the center of one side of the driver plate (32), and second mounting grooves (38) matched with the second transmitter coil (34) are formed in four corners of one side of the driver plate (32).

5. The electromagnetic shielding shell for the high-precision medical equipment according to claim 4, wherein the heating assembly (6) comprises a heat-conducting shell (61) fixedly connected to the inner side of the mounting buckle plate (7), a mounting block (62) is fixedly connected to a concave part on one side of an inner cavity of the heat-conducting shell (61), and a plurality of first heat-conducting strips (63) are inserted into one side of the mounting block (62).

6. The high-precision medical equipment electromagnetic shielding shell according to claim 5, wherein a first heat conducting coil (64) is welded to the top ends of two adjacent first heat conducting strips (63), a plurality of second heat conducting strips (65) are welded to the top of the first heat conducting coils (64), and a second heat conducting coil (66) is welded to the top of the plurality of second heat conducting strips (65).

7. The electromagnetic shielding shell for the high-precision medical equipment according to claim 6, wherein the heat conducting assembly (8) comprises an insulating sleeve (81), a first conducting rod (83), a second conducting rod (84) and a third conducting rod (85) are inserted into the surface of the insulating sleeve (81), one end of the connecting strip (9) is inserted into the insulating sleeve (81), and an insertion hole (82) matched with the connecting strip (9) is formed in the surface of the insulating sleeve (81).

8. The electromagnetic shielding shell for the high-precision medical equipment according to claim 7, wherein one end of the first conducting rod (83), the second conducting rod (84) and the third conducting rod (85) are respectively inserted into the corresponding mounting blocks (62), and one end of each of the connecting strip (9), the first conducting rod (83), the second conducting rod (84) and the third conducting rod (85) are connected together inside the insulating sleeve (81).

9. High precision medical equipment electromagnetic shielding shell according to claim 8, characterized in that the outside of each reflecting scaleboard (5) is provided with an inwardly concave arc.