CN114098602A - Shielding device, manufacturing method thereof and electronic endoscope system - Google Patents
Shielding device, manufacturing method thereof and electronic endoscope system Download PDFInfo
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- CN114098602A CN114098602A CN202111315584.8A CN202111315584A CN114098602A CN 114098602 A CN114098602 A CN 114098602A CN 202111315584 A CN202111315584 A CN 202111315584A CN 114098602 A CN114098602 A CN 114098602A
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- A61B1/00071—Insertion part of the endoscope body
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- A61B1/00105—Constructional details of the endoscope body characterised by modular construction
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- A—HUMAN NECESSITIES
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Abstract
The invention discloses a shielding device, a manufacturing method thereof and an electronic endoscope system, wherein the shielding device is used for shielding electromagnetic interference of a high-frequency instrument on an image sensor in a disposable electronic endoscope when the disposable electronic endoscope is matched with the high-frequency instrument for use, and comprises the following steps: the shielding layer is used for resisting electromagnetic interference signals generated by a high-frequency instrument on the image sensor; the guide wire is used for guiding the electromagnetic interference signals on the shielding layer into the ground; the shielding layer is coated on the image sensor or all or one section of the image sensor and the wiring harness thereof; the first end of the guide wire is connected with the shielding layer, and the second end of the guide wire is grounded; the shielding layer comprises aluminum, tin or tin-aluminum alloy material; the shielding device coats/coats the image sensor through the shielding layer, and shields the electromagnetic interference signal generated by the high-frequency instrument by utilizing the shielding layer, so that the compatibility use of the disposable electronic endoscope and the high-frequency instrument can be realized.
Description
Technical Field
The invention relates to the technical field of endoscopes, in particular to a shielding device, a manufacturing method thereof and an electronic endoscope system.
Background
Endoscopes can be classified into optical endoscopes, fiber endoscopes, and electronic endoscopes according to the manner of imaging. The optical endoscope and the image sensor of the fiber endoscope are positioned at the rear end, and an optical lens or an optical fiber is adopted to transmit the image light at the front end to the image sensor at the rear end for photosensitive imaging; the electronic endoscope directly places the image sensor at the most front end of the endoscope and directly receives image light without transmission through optical fibers or other media. Electronic endoscopes are currently a trend and mainstream in the field of endoscopes.
The traditional endoscope is repeatedly used after disinfection and sterilization, but the current disinfection and sterilization level can not completely kill microbe bacteria, and the hidden trouble of cross infection exists. The prior art electronic endoscopes are developed toward disposable use, i.e., disposable electronic endoscopes.
The front end of the existing disposable electronic endoscope is basically a plastic structural member, in which an image sensor and an instrument channel are arranged. When some pathological tissues are diagnosed and treated, a high-frequency instrument is needed to perform electro-excision or electro-coagulation (hemostasis) on redundant tissues such as polyps and the like. The high-frequency instrument passes through the instrument hole of the disposable electronic endoscope to reach the most front end and extend out.
However, the structure of the front end of the existing disposable electronic endoscope has few protection measures for the image sensor, which causes the image sensor and the front end of the high-frequency apparatus to be close together, the high-frequency apparatus will release electromagnetic interference signals when working, and the higher the working power is, the stronger the energy of the released electromagnetic interference signals is, the electromagnetic interference signal is transmitted to the image sensor next to the image sensor, the image sensor converts the optical signal into the electric signal through the photoelectric conversion of the pixel photosensitive surface, if the photoelectric conversion process is interfered by electromagnetic signals, images can flicker ceaselessly under slight conditions to interfere the operation, and the images of a monitor can be directly shielded in a dark state under severe conditions, so that doctors cannot observe the images in the bodies of patients during the operation, the operation process has to be suspended to wait for maintenance or replacement of standby products, and medical accidents are very easy to cause for the patients.
Further, for a relatively thin disposable electronic endoscope, such as a disposable electronic endoscope for urology department, the outer diameter of the front end part is usually less than 3mm, and at least one lighting module (usually 2), an infusion port, etc. are required to be arranged in a space with a narrow front end part structure in addition to an image sensor and an instrument pore, so that the space available for installing the image sensor is extremely limited, and the space at least needs to be controlled to be 1.5mm2Within. Since the resolution is a core index of the disposable electronic endoscope, and the resolution size is in positive correlation with the number of pixels of the image sensor, a large-sized high-pixel image sensor should be selected as an imaging element as much as possible in a space for mounting the image sensor at the front end portion, so as to improve the resolution of the disposable electronic endoscope. More importantly, the size of the existing image sensor is mostly micron-sized, and each increase is 0.1mm2The size is that the number of pixels more than ten thousand can be increased (the specific value depends on the unit pixel size), for example, 1.4mm2The number of pixels of the image sensor is about 1.0mm22 times higher, the sensitivity is very high. Therefore, if the image sensor is coated with the shielding material and the electromagnetic signal interference is avoided by increasing the thickness of the material, the size of the image sensor is limited, the number of pixels of the image sensor is sacrificed, and the resolution of the disposable electronic endoscope is reduced; on the contrary, if the thickness of the shielding material covering the image sensor is too small, effective shielding cannot be realized.
In summary, in order to make the disposable electronic endoscope compatible with high frequency instruments, a shielding device that does not occupy the structural space of the front end portion to meet the requirement of large-sized high-pixel image sensors and can effectively resist the electromagnetic interference of the high frequency instruments to the image sensors is needed, so as to expand the use functions of the disposable electronic endoscope and promote the development and market application thereof.
Disclosure of Invention
The invention aims to provide a shielding device which is reasonable in structure and can effectively reduce electromagnetic interference of a high-frequency instrument on an image sensor of a disposable electronic endoscope.
In order to solve the above problems, the present invention provides a shielding device for shielding electromagnetic interference of a high frequency instrument with an image sensor in a disposable electronic endoscope when the disposable electronic endoscope is used in combination with the high frequency instrument, comprising:
a shielding layer for resisting electromagnetic interference signals generated by the high-frequency instrument on the image sensor;
the guide wire is used for guiding the electromagnetic interference signals on the shielding layer into the ground;
the shielding layer is coated on the image sensor or all or one section of the image sensor and the wiring harness thereof; the first end of the guide wire is connected with the shielding layer, and the second end of the guide wire is grounded;
the shielding layer comprises aluminum, tin or tin-aluminum alloy material;
when the frequency of an electromagnetic interference signal generated by the high-frequency instrument on the image sensor is f, the thickness x of the shielding layer is as follows:
where k is the correlation constant for aluminum, tin, or tin-aluminum alloy materials.
As a further improvement of the invention, the shielding layer forms a rough surface.
As a further improvement of the invention, the second end of the guide wire is grounded through a signal relay circuit board of the disposable electronic endoscope, and the electromagnetic interference signal on the shielding layer is guided to the ground through the signal relay circuit board.
As a further improvement of the invention, the guide wire is wound at least once around the periphery of the wiring harness of the image sensor so as to cancel the electromagnetic interference signal radiated by the guide wire and conducted from the shielding layer by using the electromagnetic signal radiated by the wiring harness of the image sensor; alternatively, the first and second electrodes may be,
the guide wire is wound at least one circle around the periphery of the wiring harness of the image sensor and the wiring harness of the illumination module of the disposable electronic endoscope, so that electromagnetic interference signals radiated by the guide wire and conducted from the shielding layer are counteracted by electromagnetic signals radiated by the wiring harness of the image sensor and the wiring harness of the illumination module.
As a further improvement of the present invention, the wiring harness of the image sensor includes an outer sheath layer, and a power supply line and a signal line which are coated inside the outer sheath layer, and both the power supply line and the signal line include an inner sheath layer;
the first end of the guide wire is connected with the shielding layer, the second end of the guide wire is connected with the outer sheath layer and/or the inner sheath layer of the image sensor so as to be grounded, and the electromagnetic interference signals on the shielding layer are guided into the ground through the outer sheath layer and/or the inner sheath layer.
The invention also provides a manufacturing method of the shielding device, which is used for manufacturing the shielding device and comprises the following steps:
coating the image sensor or all or a section of the image sensor and its wiring harness with the shielding layer;
and connecting the first end of the guide wire with the shielding layer, and connecting the second end of the guide wire with the ground.
As a further improvement of the present invention, the method for manufacturing the shielding device further comprises the following steps:
and connecting the second end of the guide wire with a signal relay circuit board of the disposable electronic endoscope.
As a further improvement of the present invention, the method for manufacturing the shielding device further comprises the following steps:
winding the guidewire around a wire harness of the image sensor; alternatively, the first and second electrodes may be,
winding the guide wire on a wire harness of the image sensor and a wire harness of an illumination module.
As a further improvement of the present invention, the method for manufacturing the shielding device further comprises the following steps:
connecting a second end of the guidewire with an outer sheath layer and/or an inner sheath layer of the image sensor.
The invention also provides an electronic endoscope system, which comprises a disposable electronic endoscope, wherein the disposable electronic endoscope is integrated with the shielding device, and the shielding device is used for resisting the electromagnetic interference of a high-frequency instrument on an image sensor in the disposable electronic endoscope when the disposable electronic endoscope is matched with the high-frequency instrument for use.
The invention has the beneficial effects that:
the shielding device coats/coats the image sensor through the shielding layer, and shields the electromagnetic interference signal generated by a high-frequency instrument by utilizing the shielding layer; the image sensor is selected under the thickness of the shielding layer, so that the pixel number/resolution can be maximized; the residual electromagnetic interference signal on the shielding layer is guided into the ground by utilizing a guide wire or a multiple sheath layer structure, so that the electromagnetic interference of a high-frequency instrument on an image sensor of the disposable electronic endoscope is further reduced; the device is integrated in a micro space at the front end part of the disposable electronic endoscope, and the compatible use of the disposable electronic endoscope and a high-frequency instrument can be realized. The shielding device of the invention also has good electromagnetic shielding effect on high-power high-frequency instruments.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a partial assembly view of a shielding device and a disposable electronic endoscope in accordance with one embodiment of the present invention;
FIG. 2 is an assembled view of the shielding device and the disposable electronic endoscope in accordance with one embodiment of the present invention;
FIG. 3 is a schematic view of the connection structure of the endoscope main unit and the signal cable;
FIG. 4 is a partial assembly view of the shielding device and the disposable electronic endoscope in a third embodiment of the present invention;
FIG. 5 is a partial assembly view of the shielding device and the disposable electronic endoscope in a fourth embodiment of the present invention;
FIG. 6 is a partial assembly view of a fifth embodiment of the present invention showing a shielding device and a disposable electronic endoscope;
FIG. 7 is a radial sectional view of a wiring harness of an image sensor in the fifth embodiment of the present invention;
FIG. 8 is a radial cross-sectional view of a power supply line and a signal line in a fifth embodiment of the present invention;
fig. 9 is an axial sectional view of the positive power supply line and the signal line in the fifth embodiment of the present invention.
Description of the labeling: 1. a high frequency instrument; 11. a front end portion; 12. an instrument channel; 13. a signal relay circuit board; 14. an endoscope housing; 15. an endoscope host; 151. an internal circuit board; 152. a ground terminal; 16. a signal cable; 161. a ground wire; 20. an image sensor; 21. a wiring harness of the image sensor; 22. an outer shield layer; 23. a first outer skin; (ii) a 24. A positive supply line; (ii) a 25. An input signal line; 26. an output signal line; 211. an inner shield layer; 212. a second outer skin; 213. a wire core; 30. a lighting module; 31. a wiring harness of the lighting module; 41. a shielding layer; 42. a guidewire.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Example one
As shown in FIG. 1, the present embodiment discloses a shielding device for shielding electromagnetic interference of a high frequency instrument on an image sensor 20 of a disposable electronic endoscope when the disposable electronic endoscope is used in cooperation with the high frequency instrument.
The shielding device includes:
and the shielding layer 41 is used for resisting electromagnetic interference generated by high-frequency instruments on the image sensor 20.
Optionally, the shielding layer is coated on the image sensor 20 or all or a segment of the image sensor 20 and its wiring harness 21. The method is characterized in that the thickness x of the shielding layer 41 is determined by the following formula:
the frequency of the electromagnetic interference signal is f, k is a correlation constant of the aluminum, tin or tin-aluminum alloy material, and the correlation constant is related to the relative magnetic permeability and the resistivity of the material selected for the shielding layer 41.
According to the above formula, the smaller the frequency f of the electromagnetic interference signal, the larger the correlation constant k of the shield layer 41, and the thicker the thickness x of the shield layer 41 is required. However, as mentioned above, the size of the image sensor will be reduced with each increase of the thickness x of the shielding layer by 0.1mm, and the number of pixels above ten thousand levels will be sacrificed. Therefore, in order to make the thickness of the shielding layer as thin as possible on the premise of ensuring the shielding effect, the invention selects a material with high resistivity such as tin, aluminum or tin-aluminum alloy (i.e. tinfoil paper) as the material of the shielding layer 41, structurally adopts a tin layer, an aluminum layer, a tin-aluminum alloy layer or a tin-aluminum composite layer, etc., and coats/coats the image sensor 20 or the image sensor 20 and all or one section of the wiring harness 21 thereof, after part of the electromagnetic interference signal is reflected on the surface of the shielding layer 41, a part of the shielding layer 41 body in the rest part forms an eddy current on the surface of the shielding material due to the skin effect, thereby weakening the influence of the electromagnetic interference signal on the image sensor. And calculating to obtain the thickness x of the shielding material by a skin depth formula and combining the frequency range of a high-frequency instrument suitable for endoscopic surgery. The shielding effectiveness of the high-frequency instrument for the endoscopic surgery is about 67.17dB under the thickness, and the high-frequency instrument has a good electromagnetic shielding effect. Selecting the image sensor at this thickness will enable the highest number of pixels/resolution to be obtained. And tin, aluminum and the like are common materials, are easy to obtain, and have economic benefit for the disposable electronic endoscope.
The derivation process of the electromagnetic shielding effectiveness of the shielding layer 41 of the present invention is described as follows:
TABLE 1 Shielding material thickness x for tin and aluminum materials at high frequency Instrument operating frequencies
Electromagnetic shielding effect and electromagnetic shielding effectiveness SEAnd measuring and representing the attenuation degree of the shielding body to the electromagnetic wave. SEThe method comprises absorption loss A, reflection loss R and multiple reflection correction factor B, and the expression is as follows: sEWhen a > 10dB, the multiple reflection correction factor B is negligible.
Taking the central frequency f of the electromagnetic interference signal as 430kHz, the shielding material uses tin as an example:
skin depth
Therefore, the absorption loss efficiency is:
the interference source distance D is a distance from the tip of the high-frequency instrument to the shielding layer of the image sensor, and is generally 10mm to 20mm, and the intermediate value D is 15 mm.
Interference signal length of electromagnetic interference signal
Distance of interference source
The high-frequency apparatus is high-voltage discharge for near-field electromagnetic interference signals, the radiation field is mainly an electric field, and the efficiency of reflection loss is calculated by the near-field electric field.
The absorption loss efficiency A is less than 10dB, so the multiple reflection correction factor B needs to be considered:
in summary, the electromagnetic shielding performance of the shielding apparatus in this embodiment is:
SE＝8.56dB+60.93dB-2.32dB＝67.17dB
in addition, the surface of the shielding layer 41 may be configured as a rough surface, which for the eddy current propagating near the surface of the shielding layer caused by the electromagnetic interference signal, is equivalent to increase the length of its propagation path, so that such a surface will cause larger resistive loss, further improving the shielding performance.
Example two
Further, since the shielding effectiveness is characterized by the attenuation degree of the electromagnetic wave by the shielding body, i.e. the ratio of the electromagnetic field strength E1 when no shielding exists to the electromagnetic field strength E2 when shielding exists, it represents the shielding effect of the shielding layer 41. The absolute value of the electromagnetic field intensity E1 finally propagated to the image sensor is also related to the intensity of the electromagnetic interference signal emitted by the high-frequency instrument, and when the power of the high-frequency instrument is higher, the intensity of the electromagnetic field penetrating through the shielding layer 41 and reaching the image sensor 20 is higher, which directly affects whether the image sensor 20 can work normally. Furthermore, the thickness x of the shielding layer 41 derived from the skin depth is the depth when the eddy current density is attenuated to the remaining 37%, and if the shielding is to be completed, the thickness x of the shielding layer 41 needs to be at least 3-6 times of the skin depth, which cannot be realized in a narrow space within 1.5mm × 1.5 mm. In order to better enable the disposable electronic endoscope to be matched with a high-power high-frequency instrument for use, upgrading needs to be carried out on the basis of front work, and the shielding effect is further improved, in the second embodiment, on the basis of the first embodiment, a guide wire 42 is added, a first end of the guide wire 42 is connected with the shielding layer 41, a second end of the guide wire is connected with a grounding end on the signal relay circuit board 13 of the disposable electronic endoscope, and the guide wire is used for guiding electromagnetic interference signals remained on the shielding layer 41 to be far away from one side of the image sensor 20, and the electromagnetic interference signals are gradually lost and offset in the process of being far away, or are finally guided into the ground. The material of the guide wire 42 is metal, preferably nickel-titanium wire.
Alternatively, as shown in fig. 4, the conducting wire 42 is wound at least once around the periphery of the wiring harness 21 of the image sensor, and the electromagnetic interference signal conducted from the shielding layer 41 radiated by the conducting wire 42 is cancelled by the electromagnetic signal radiated by the wiring harness 21 of the image sensor;
alternatively, as shown in fig. 5, the wire harness 21 of the image sensor and the wire harness 31 of the illumination module are combined into one, and then the wire 42 is wound at least once around the periphery of the combined wire harness, so that the electromagnetic interference signal transmitted from the shielding layer 41 and radiated by the wire 42 is cancelled by the electromagnetic signal radiated by the wire harness 21 of the image sensor and the wire harness 31 of the illumination module.
Preferably, the guide wire 42 is wound in a twisted pair with the harness 21 of the image sensor, or the composite harness of the image sensor 20 and the illumination module 30. The mode not only can reduce the surrounding area of the induction loop between the wire harnesses, but also locally, the polarities of induction voltages are opposite, and induction currents on each wire are mutually offset, so that the electromagnetic shielding effect is improved. Wherein, when the period of the twisted pair is smaller, the twisting pitch is shorter, and the shielding effect is better.
As shown in fig. 2, the disposable electronic endoscope includes a signal relay circuit board 13, an endoscope housing 14, and an endoscope main unit 15, the signal relay circuit board 13 is disposed on the endoscope housing 14, the signal relay circuit board 13 is connected to the endoscope main unit 15 via a signal cable 16, the signal relay circuit board 13 has a first ground terminal and a second ground terminal (not shown), the first ground terminal is located on a side close to the image sensor 20, and the second ground terminal is located on a side far from the image sensor 20, and is a common ground terminal of various wire harnesses in the guide wire 42 and the signal cable 16, respectively. The endoscope main body 15 is provided with a ground terminal. The guide wire 42 introduces the electromagnetic interference signal remaining on the shielding layer 41 to the first ground end, then transmits the electromagnetic interference signal to the second ground end, transmits the electromagnetic interference signal to the endoscope main unit 15 through the signal cable 16, and finally guides the electromagnetic interference signal to the ground through the ground end of the endoscope main unit 15 itself. In addition, the signal relay circuit board 13 can be used for identifying the serial number of each disposable electronic endoscope and recording the use time, and the disposable electronic endoscope cannot be used after exceeding the specified time, so that the purpose of disposable use is realized by preventing artificial long-time operation for many times.
As shown in fig. 3, the endoscope main unit 15 includes an internal circuit board 151 and a ground terminal 152, electromagnetic interference signals flow to the internal circuit board 151 and the housing of the endoscope main unit 15 through a ground line 161 in the signal cable 16, the electromagnetic interference signals flowing to the housing flow to the ground through the ground terminal 152, and the electromagnetic interference signals flowing to the internal circuit board 151 also flow to the ground through the ground terminal 152. And the electromagnetic interference signals are eliminated completely by a mode of two flow directions.
In the embodiment, by arranging the guide wire 42 and various winding ways, and by using the grounding end of the signal relay circuit board, the two-way shunt of the endoscope host and the combined shielding way of arranging the grounding terminal, the electromagnetic interference signals released by the high-power high-frequency instrument are guided to be away from one side of the image sensor after being subjected to primary loss by the shielding layer in the embodiment one, and are gradually lost and offset in the transmission process, and finally, the residual part is also introduced into the ground, so that the electromagnetic interference resistance of the disposable electronic endoscope is further improved; in addition, when the disposable electronic endoscope is actually operated, the insertion part including the front end part 11 of the endoscope undergoes a plurality of bending in a human body, if the wire harness is distributed into a plurality of strands of single wires in the insertion part, the risk that the single wires distributed at different positions in the insertion part may interfere with other parts in the insertion part in the process of continuous bending, so that the single wires are disconnected with the welding points of the image sensor 20 or the illumination module 30 in the front end part 11, and the toughness and the strength of the cable can be enhanced by tightly winding a plurality of loose wire harnesses into one bundle through the guide wire, so that the risk problem caused by the single wires is solved, and the use safety is improved; in addition, the wire harness can penetrate through the insertion part during production, so that the assembly is convenient, and the production efficiency of the disposable electronic endoscope can be improved.
EXAMPLE III
As shown in fig. 7-9, image sensor's pencil 21 includes oversheath layer and cladding in the inside power supply line and the signal line of oversheath layer, the power supply line includes anodal power supply line 24, the signal line includes input signal line 25 and output signal line 26, the oversheath layer includes outer shielding layer 22 and the first crust 23 that sets gradually from inside to outside, anodal power supply line 24, input signal line 25 and output signal line 26 all include the inner sheath layer, the inner sheath layer includes the inner shielding layer 211 that sets gradually from inside to outside, second crust 212, sinle silk 213 is located the inner sheath in situ.
As shown in fig. 6, the embodiment of the present invention discloses a shielding apparatus, which is different from the second embodiment in that: the first end of the conducting wire 42 is connected to the shielding layer 41, and the second end is connected to the outer sheath layer and/or the inner sheath layer of the wiring harness 21 of the image sensor, so as to guide the electromagnetic interference signal on the shielding layer 41 to the ground through the outer sheath layer and/or the inner sheath layer.
Preferably, the outer shield 22 and the four inner shields 211 of the positive power supply line 24, the input signal line 25 and the output signal line 26 are connected and form a negative power supply line of the image sensor 20.
In the present embodiment, the wire harness having a multi-sheath structure is adopted, and the shielding layer in the outer sheath layer and/or the inner sheath layer of the wire harness itself is fully utilized, which not only serves as the function of the guide wire 42 (i.e. conducting and losing residual electromagnetic interference signals caused by high-frequency devices), but also serves as the negative power supply line of the positive power supply line and the input/output signal line, and the utilization rate is high. And each line in the outer sheath layer is provided with an independent shielding layer, so that the function of preventing signals between the lines from mutual crosstalk is achieved. In addition, the pencil of multiple restrictive coating has strengthened disposable electronic endoscope's toughness and intensity for single integrated structure to compare the effect better with the wire winding mode reinforcing toughness in embodiment two, because outer jacket layer and/or inner sheath layer are denser in addition, compare seal wire 42 shielding effect better, it is also more convenient to batch production manufacturing.
Example four
The embodiment discloses a manufacturing method of a shielding device, which is used for manufacturing the shielding device in the second embodiment and comprises the following steps:
coating/coating the image sensor 20 or the image sensor 20 and all or a section of its wiring harness 21 with a shielding layer 41;
the shield layer 41 is connected to a ground terminal on the signal relay circuit board 13 of the disposable electronic endoscope by a wire 42 to guide the electromagnetic interference signal on the shield layer 41 to the ground.
Optionally, the method further comprises the following steps:
winding the guide wire 42 on the wiring harness 21 of the image sensor, and utilizing the electromagnetic interference signal radiated by the guide wire 42 to counteract the electromagnetic interference signal radiated by the wiring harness 21 of the image sensor; alternatively, the first and second electrodes may be,
the guide wire 42 is wound around the combined wire harness of the image sensor 20 and the illumination module 30, and the electromagnetic interference signal radiated from the combined wire harness is cancelled by the electromagnetic interference signal radiated from the guide wire 42.
Preferably, the guide wire 42 is wound in a twisted pair with the wiring harness 21 of the image sensor; alternatively, the first and second electrodes may be,
the guide wire 42 is twisted with the combined wire harness in a twisted pair manner.
EXAMPLE five
The embodiment discloses a manufacturing method of a shielding device, which is used for manufacturing the shielding device in the fifth embodiment, and the method comprises the following steps:
the guide wire 42 is connected at a first end to the shielding layer 41 and at a second end to the outer sheath layer and/or the inner sheath layer of the image sensor 20.
EXAMPLE six
The embodiment discloses an electronic endoscope system, which comprises a disposable electronic endoscope, wherein the disposable electronic endoscope is integrated with a shielding device as described in any one of the first to fifth embodiments, and the shielding device is used for shielding electromagnetic interference of a high-frequency instrument on an image sensor in the disposable electronic endoscope when the disposable electronic endoscope is matched with the high-frequency instrument for use. The disposable electronic endoscope comprises a signal relay circuit board 13, an endoscope shell 14 and an endoscope host 15, wherein the signal relay circuit board 13 is arranged on the endoscope shell 14, the signal relay circuit board 13 is connected with the endoscope host 15 through a signal cable 16, and a grounding end is arranged on the endoscope host 15.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A shielding device for shielding electromagnetic interference of a high-frequency instrument to an image sensor in a disposable electronic endoscope when the disposable electronic endoscope is used with the high-frequency instrument, comprising:
a shielding layer for resisting electromagnetic interference signals generated by the high-frequency instrument on the image sensor;
the guide wire is used for guiding the electromagnetic interference signals on the shielding layer into the ground;
the shielding layer is coated on the image sensor or all or one section of the image sensor and the wiring harness thereof; the first end of the guide wire is connected with the shielding layer, and the second end of the guide wire is grounded;
the shielding layer comprises aluminum, tin or tin-aluminum alloy material;
when the frequency of an electromagnetic interference signal generated by the high-frequency instrument on the image sensor is f, the thickness x of the shielding layer is as follows:
where k is the correlation constant for aluminum, tin, or tin-aluminum alloy materials.
2. The shielding device of claim 1, wherein said shielding layer forms a rough surface.
3. The shielding device of claim 1, wherein the second end of the guide wire is grounded through a signal relay circuit board of the disposable electronic endoscope, and the electromagnetic interference signal on the shielding layer is guided to the ground through the signal relay circuit board.
4. The shielding device of claim 1, wherein the guide wire is wound at least once around the periphery of the wiring harness of the image sensor to cancel an electromagnetic interference signal radiated by the guide wire and conducted from the shielding layer by using an electromagnetic signal radiated by the wiring harness of the image sensor; alternatively, the first and second electrodes may be,
the guide wire is wound at least one circle around the periphery of the wiring harness of the image sensor and the wiring harness of the illumination module of the disposable electronic endoscope, so that electromagnetic interference signals radiated by the guide wire and conducted from the shielding layer are counteracted by electromagnetic signals radiated by the wiring harness of the image sensor and the wiring harness of the illumination module.
5. The shielding device of claim 1,
the wiring harness of the image sensor comprises an outer sheath layer, and a power supply line and a signal line which are coated in the outer sheath layer, wherein the power supply line and the signal line both comprise the inner sheath layer;
the first end of the guide wire is connected with the shielding layer, the second end of the guide wire is connected with the outer sheath layer and/or the inner sheath layer of the image sensor so as to be grounded, and the electromagnetic interference signals on the shielding layer are guided into the ground through the outer sheath layer and/or the inner sheath layer.
6. A method of manufacturing a shielding device, for manufacturing a shielding device according to claim 1 or 2, comprising the steps of:
coating the image sensor or all or a section of the image sensor and its wiring harness with the shielding layer;
and connecting the first end of the guide wire with the shielding layer, and connecting the second end of the guide wire with the ground.
7. A method of manufacturing a shielding device according to claim 6, for manufacturing a shielding device according to claim 3, comprising the steps of:
and connecting the second end of the guide wire with a signal relay circuit board of the disposable electronic endoscope.
8. Method for manufacturing a shielding device according to claim 6, for manufacturing a shielding device according to claim 4, comprising the steps of:
winding the guidewire around a wire harness of the image sensor; alternatively, the first and second electrodes may be,
winding the guide wire on a wire harness of the image sensor and a wire harness of an illumination module.
9. Method for manufacturing a shielding device according to claim 6, for manufacturing a shielding device according to claim 5, comprising the steps of:
connecting a second end of the guidewire with an outer sheath layer and/or an inner sheath layer of the image sensor.
10. An electronic endoscope system comprising a disposable electronic endoscope, wherein said disposable electronic endoscope has integrated thereon a shielding device according to any of claims 1-5, said shielding device being adapted to resist electromagnetic interference of high frequency instruments with image sensors of the disposable electronic endoscope when the disposable electronic endoscope is used in conjunction with said high frequency instruments.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315584.8A CN114098602A (en) | 2021-11-08 | 2021-11-08 | Shielding device, manufacturing method thereof and electronic endoscope system |
| PCT/CN2022/129765 WO2023078377A1 (en) | 2021-11-08 | 2022-11-04 | Shielding device and manufacturing method therefor, and electronic endoscope system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111315584.8A CN114098602A (en) | 2021-11-08 | 2021-11-08 | Shielding device, manufacturing method thereof and electronic endoscope system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114098602A true CN114098602A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111315584.8A Pending CN114098602A (en) | 2021-11-08 | 2021-11-08 | Shielding device, manufacturing method thereof and electronic endoscope system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114098602A (en) |
| WO (1) | WO2023078377A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023078377A1 (en) * | 2021-11-08 | 2023-05-11 | 新光维医疗科技(苏州)股份有限公司 | Shielding device and manufacturing method therefor, and electronic endoscope system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3607873B2 (en) * | 2001-03-19 | 2005-01-05 | オリンパス株式会社 | Electronic endoscope device |
| US20090076329A1 (en) * | 2007-09-17 | 2009-03-19 | Wei Su | Disposable Stereoscopic Endoscope System |
| US8876413B2 (en) * | 2013-03-14 | 2014-11-04 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Method and system for providing electromagnetic interference (EMI) shielding in an optical communications module |
| CN208157141U (en) * | 2018-03-05 | 2018-11-27 | 东莞市立成电线有限公司 | With the cable for reducing electromagnetic interference |
| CN109755265A (en) * | 2019-03-22 | 2019-05-14 | 德淮半导体有限公司 | Imaging sensor and forming method thereof |
| CN210073382U (en) * | 2019-07-18 | 2020-02-14 | 湖南瑞邦医疗科技发展有限公司 | Cable for electronic endoscope |
| CN114098602A (en) * | 2021-11-08 | 2022-03-01 | 新光维医疗科技(苏州)股份有限公司 | Shielding device, manufacturing method thereof and electronic endoscope system |
-
2021
- 2021-11-08 CN CN202111315584.8A patent/CN114098602A/en active Pending
-
2022
- 2022-11-04 WO PCT/CN2022/129765 patent/WO2023078377A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023078377A1 (en) * | 2021-11-08 | 2023-05-11 | 新光维医疗科技(苏州)股份有限公司 | Shielding device and manufacturing method therefor, and electronic endoscope system |
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| Publication number | Publication date |
|---|---|
| WO2023078377A1 (en) | 2023-05-11 |
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