CN210077702U - Rotary transformer and medical equipment - Google Patents
Rotary transformer and medical equipment Download PDFInfo
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- CN210077702U CN210077702U CN201920631346.XU CN201920631346U CN210077702U CN 210077702 U CN210077702 U CN 210077702U CN 201920631346 U CN201920631346 U CN 201920631346U CN 210077702 U CN210077702 U CN 210077702U
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Abstract
The utility model discloses a rotary transformer and medical equipment, set up first shielding part at the second face of primary base plate respectively, set up second shielding part at the second face of secondary base plate, and at least one ground connection in first shielding part and the second shielding part, then to outside conduction electromagnetism harassment and space radiation harassment, it can all return to the earth directly through the ground connection shielding part or return to the earth through parasitic capacitance and corresponding ground connection shielding part between first shielding part and the second shielding part; in addition, common mode electromagnetic disturbance generated between the primary coil and the secondary coil due to ground potential difference can also return to the ground through parasitic capacitance between the first shielding part and the second shielding part and parasitic capacitance between a spiral pipe of the conduit and the ground, so that electromagnetic disturbance flowing to the ultrasonic module or the conduit is greatly reduced, in addition, the filtering range is wide, the electromagnetic disturbance flowing to the ultrasonic module or the conduit is further reduced, and the purity of ultrasonic echo signals is ensured.
Description
Technical Field
The utility model relates to an equipment filtering technology field especially relates to a rotary transformer and medical equipment.
Background
Many existing medical devices include catheters, rotary transformers, ultrasonic probes, etc., and the principle of the medical devices is based on the transmission and reflection of ultrasonic signals, and the ultrasonic signals are in the microvolt level and are easily interfered. Specifically, the ultrasonic endoscopic imaging system is introduced as an example, and the ultrasonic endoscopic imaging system includes a host, a CCU (Catheter Control Unit) ultrasonic module, a rotary transformer, and a Catheter (including a Catheter and piezoelectric ceramics) which are connected in sequence. The working principle is that the ultrasonic probe is extended into a human body inner cavity or a blood vessel through a biopsy channel of the electronic endoscope to approach a target organ, and the motor drives the ultrasonic probe to rotate for 360 degrees so as to carry out tomography imaging on the human body inner cavity or the blood vessel. For safety reasons, ultrasound probes or catheters that extend into body lumens or blood vessels are primarily coupled to signals or energy through a rotary transformer. The quality of an ultrasonic echo signal returned by the ultrasonic probe plays a decisive role in the performance of the ultrasonic endoscopic imaging system, and the ultrasonic echo signal is microvolt-level and is easy to be interfered.
The interference source is mainly divided into external conduction electromagnetic disturbance and space radiation disturbance, wherein the external conduction electromagnetic disturbance mainly comes from a power line, an S-Video (S terminal output), a network cable, an HDMI (high definition Multimedia Interface) and a ground wire of the host, and the external conduction electromagnetic disturbance returns to the ground through the host, the CCU ultrasonic module, a parasitic capacitor of the rotary transformer, a parasitic capacitor of the conduit and a parasitic capacitor of a human body to interfere an ultrasonic echo signal, so as to interfere an ultrasonic image. The spatial radiation disturbance is mainly generated because the conduit is composed of a spiral pipe and a coaxial cable, a motor drives the spiral pipe to operate, and then drives the coaxial cable to rotate for 360 degrees, the conduit is generally longer than 1m and is a good electromagnetic field receiving antenna, and a spatial electromagnetic field received by the conduit or a probe is coupled to the CCU ultrasonic module through a parasitic capacitor of a rotary transformer to disturb ultrasonic images.
In the prior art, in order to reduce the above two kinds of interference, a common mode inductor is generally connected in series between a rotary transformer and an ultrasonic probe, although the common mode inductor can play a role in inhibiting high-frequency interference to a certain extent, parasitic capacitance exists between each turn of windings of a coil of the common mode inductor, which can weaken common mode inhibition performance, and meanwhile, a magnetic core material of the common mode inductor has a certain filtering range, which cannot effectively inhibit broadband electromagnetic interference.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a rotary transformer and medical equipment has reduced the electromagnetic disturbance of flow direction supersound module or pipe, has guaranteed supersound echo signal's purity.
In order to solve the technical problem, the present invention provides a rotary transformer applied to a medical device including a catheter connected to the rotary transformer, the rotary transformer including a primary substrate, a secondary substrate, a primary coil disposed on a first side of the primary substrate, and a secondary coil disposed on a first side of the secondary substrate, wherein the first side of the primary substrate and the first side of the secondary substrate are disposed in a back-to-back manner; further comprising:
a first shield portion provided on the second surface of the primary substrate;
a second shield portion disposed on the second surface of the secondary substrate and connected to the spiral tube of the duct;
at least one of the first shielding part and the second shielding part is grounded and used for guiding external conduction electromagnetic disturbance and space radiation disturbance to the ground.
Preferably, the first shielding part is directly grounded, and the second shielding part is grounded in a floating manner or through a second safety capacitor.
Preferably, the first shielding part is grounded through a first safety capacitor, and the second shielding part is grounded in a floating manner or through a second safety capacitor.
Preferably, the first shielding part floats to the ground, and the second shielding part is grounded through a second safety capacitor.
Preferably, the first shielding part and/or the second shielding part is a metal sheet.
Preferably, the first shield part and/or the second shield part is a metal coating.
Preferably, the first shielding part covers the winding of the primary coil in a projection in a direction perpendicular to the primary substrate;
the second shielding portion covers the winding of the secondary coil in a projection in a direction perpendicular to the secondary substrate.
Preferably, the first shielding part has a width greater than that of the winding of the primary coil, and the second shielding part has a width greater than that of the winding of the secondary coil.
In order to solve the technical problem, the utility model also provides a medical equipment, include as above-mentioned resolver or vascular ultrasound system.
Preferably, the medical device is an ultrasonic endoscopic imaging system or a vascular ultrasound system.
The utility model provides a rotary transformer, set up first shielding part at the back that sets up the primary base plate of primary respectively, set up the second shielding part at the back that sets up the secondary base plate of secondary, and at least one ground connection in first shielding part and the second shielding part, then no matter to outside conduction electromagnetism disturbance, still to the space radiation disturbance, on the one hand, it all can directly return to the ground through corresponding ground connection shielding part directly or return to the ground through parasitic capacitance and corresponding ground connection shielding part between first shielding part and the second shielding part; in addition, common-mode electromagnetic disturbance generated between the primary coil and the secondary coil due to ground potential difference can also return to the ground through parasitic capacitance between the first shielding part and the second shielding part and parasitic capacitance between a spiral pipe of the conduit and the ground, so that electromagnetic disturbance flowing to the ultrasonic module or the conduit is greatly reduced.
The utility model also provides a medical equipment including above-mentioned rotary transformer, has the same beneficial effect with above-mentioned rotary transformer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rotary transformer according to the present invention;
fig. 2 is a schematic view of a partial structure of a rotary transformer according to the present invention.
Detailed Description
The core of the utility model is to provide a rotary transformer and medical equipment, reduced the electromagnetic disturbance of flow direction supersound module or pipe, guaranteed supersound echo signal's purity.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, wherein fig. 1 is a schematic structural diagram of a rotary transformer according to the present invention (fig. 1 illustrates only the grounding of the first shielding portion), and fig. 2 is a schematic structural diagram of a part of a rotary transformer according to the present invention.
The rotary transformer is applied to medical equipment comprising a catheter connected with the rotary transformer, and comprises a primary substrate 1, a secondary substrate 4, a primary coil 2 arranged on a first surface of the primary substrate 1, and a secondary coil 3 arranged on a first surface of the secondary substrate 4, wherein the first surface of the primary substrate 1 and the first surface of the secondary substrate 4 are arranged oppositely (conversely, the second surface of the primary substrate 1 and the second surface of the secondary substrate 4 are arranged oppositely or face to face);
further comprising:
a first shield portion 5 provided on the second surface of the primary substrate 1;
a second shield part 6 provided on the second surface of the sub-substrate 4 and connected to the spiral pipe of the duct;
at least one of the first shield part 5 and the second shield part 6 is grounded for guiding external conducted electromagnetic and spatial radiation disturbances to the ground.
Specifically, in order to solve the problems of external conductive electromagnetic disturbance at the power line, S-Video, network cable, HDMI, and ground line terminals of the utility power from the host computer and spatial radiation disturbance from the spatial electromagnetic field, unlike the prior art in which a common mode inductance is connected in series between the resolver and the ultrasonic probe, the present application provides a first shielding part 5 on the second surface of the primary substrate 1 and a second shielding part 6 on the second surface of the secondary substrate 4, wherein the second shielding part 6 is further connected to the spiral tube of the catheter, and at least one of the first shielding part 5 and the second shielding part 6 is grounded.
When only the first shielding part 5 is grounded, the external conduction electromagnetic disturbance can directly return to the ground through the first shielding part 5, so that the external conduction electromagnetic disturbance is prevented from flowing to a conduit or an ultrasonic probe, is converted into differential mode interference on the conduit or the ultrasonic probe, is superposed with an ultrasonic echo signal, and is reversely coupled to an ultrasonic module to interfere an ultrasonic image; the space radiation disturbance returns to the ground through the spiral tube, the second shielding part 6, the parasitic capacitance between the second shielding part 6 and the first shielding part 5, so that the space radiation disturbance is prevented from flowing to the sensitive ultrasonic module.
When only the second shield 6 is grounded, spatial radiation disturbance returns directly to the ground through the second shield 6, thereby avoiding flow to the sensitive ultrasound module; the external conductive electromagnetic disturbance is returned to the ground through the first shield part 5, the parasitic capacitance between the first shield part 5 and the second shield part 6, thereby avoiding flowing to the catheter or the ultrasonic probe. In addition, the second shielding part 6 is in impedance balance with the secondary coil 3 of the rotary transformer, and can also effectively prevent the space radiation disturbance received by the conduit from being converted into differential mode disturbance.
When both the first shield part 5 and the second shield part 6 are grounded, the external conduction electromagnetic disturbance returns to the ground directly through the first shield part 5, and even if part of the external conduction electromagnetic disturbance does not return to the ground directly through the first shield part 5, it returns to the ground through the first shield part 5, the parasitic capacitance between the first shield part 5 and the second shield part 6, and the second shield part 6; the spatial radiation disturbance returns to the ground directly through the second shield 6, and even if part of the spatial radiation disturbance does not return to the ground directly through the second shield 6, it returns to the ground through the spiral tube, the second shield 6, the parasitic capacitance between the second shield 6 and the first shield 5, and the first shield 5.
Therefore, whether the first shielding part 5 or the second shielding part 6 is grounded or both are grounded, external conduction electromagnetic disturbance and space radiation disturbance can be guided to the ground, electromagnetic disturbance flowing to an ultrasonic module or a conduit is greatly reduced, and purity of ultrasonic echo signals is guaranteed. In addition, the filtering range of the filtering mode is wide, so that the electromagnetic disturbance flowing to the ultrasonic module or the conduit is further reduced, and the purity of an ultrasonic echo signal is ensured.
In addition, the secondary coil 3 of the rotary transformer and the catheter need to be floating according to the safety requirements, so that a potential difference of 'ground', namely common-mode electromagnetic disturbance, may exist between the primary coil 2 and the secondary coil 3 of the rotary transformer. The two shielding parts arranged in the application are combined with a larger parasitic capacitance between the conduit (usually longer, can be as long as 1.5m) and the ground, so that common-mode electromagnetic disturbance caused by ground potential difference is conducted to the conduit from the parasitic capacitance between the first shielding part 5 and the second shielding part 6, and returns to the ground from the parasitic capacitance between the spiral pipe at the periphery of the conduit and the ground due to the skin effect, thereby eliminating the electromagnetic interference caused by the ground potential difference.
It should be noted that, in the present application, the primary substrate 1 and the secondary substrate 4 may be FPCs (Flexible Printed Circuit), and the FPCs have the advantages of good heat dissipation performance, good solderability, easy connection, low comprehensive cost, and the like. In addition, the first shielding part 5 and the second shielding part 6 are essentially electric conductors, and therefore, the electric conductors may be selected from a conductive metal sheet, a conductive metal coating, and the like, and the present application is not particularly limited thereto.
To sum up, the utility model provides a rotary transformer has set up first shield part 5 at the back that primary base plate 1 set up primary coil 2 respectively, has set up second shield part 6 at the back that secondary base plate 4 set up secondary coil 3, and at least one ground connection in first shield part 5 and the second shield part 6, then no matter for the external conduction electromagnetic disturbance, or for the space radiation disturbance, on the one hand, it all can directly return to the ground through corresponding ground connection shield part or return to the ground through parasitic capacitance between first shield part 5 and the second shield part 6 and corresponding ground connection shield part; in addition, common mode electromagnetic disturbance generated between the primary coil 2 and the secondary coil 3 due to ground potential difference can also return to the ground through parasitic capacitance between the first shielding part 5 and the second shielding part 6 and parasitic capacitance between a spiral pipe of the conduit and the ground, so that electromagnetic disturbance flowing to the ultrasonic module or the conduit is greatly reduced.
On the basis of the above-described embodiment:
as a preferred embodiment, the first shield part 5 is directly grounded, and the second shield part 6 is grounded in a floating manner or through a second ballast capacitor.
Specifically, when the first shield part 5 is directly grounded and the second shield part 6 is floating, the external conduction electromagnetic disturbance can directly return to the ground through the first shield part 5, thereby avoiding the external conduction electromagnetic disturbance from flowing to the conduit or the ultrasonic probe; the space radiation disturbance returns to the ground through the spiral tube, the second shielding part 6, the parasitic capacitance between the second shielding part 6 and the first shielding part 5, so that the space radiation disturbance is prevented from flowing to the sensitive ultrasonic module. The arrangement mode further meets the safety regulation requirement on the basis of effectively filtering external conduction electromagnetic disturbance and space radiation disturbance, and the whole rotary transformer is simple in structure. In addition, the safety capacitor has a filtering function, can further filter external conduction electromagnetic disturbance and space radiation disturbance, and further improves the anti-interference performance and safety of the rotary transformer. The specific specification of the safety capacitor is not particularly limited, and is determined as the case may be.
When the first shield part 5 is directly grounded and the second shield part 6 is grounded through the second safety capacitor, the external conduction electromagnetic disturbance returns to the ground through the first shield part 5 directly, and even if part of the external conduction electromagnetic disturbance does not return to the ground through the first shield part 5 directly, the external conduction electromagnetic disturbance returns to the ground through the first shield part 5, the parasitic capacitor between the first shield part 5 and the second shield part 6, and the second shield part 6; the spatial radiation disturbance returns to the ground directly through the second shield 6, and even if part of the spatial radiation disturbance does not return to the ground directly through the second shield 6, it returns to the ground through the spiral tube, the second shield 6, the parasitic capacitance between the second shield 6 and the first shield 5, and the first shield 5. Compared with the grounding of a single-side shielding part, the arrangement mode has better effect of filtering external conduction electromagnetic disturbance and space radiation disturbance, and also meets the requirement of safety regulations, and the whole rotary transformer has simple structure. In addition, the second safety capacitor has a filtering function, so that external conduction electromagnetic disturbance and space radiation disturbance can be further filtered, and the anti-interference performance and the safety of the rotary transformer are further improved.
As a preferred embodiment, the first shield part 5 is grounded through a first safety capacitor, and the second shield part 6 is grounded in a floating manner or through a second safety capacitor.
Specifically, when the first shielding part 5 is grounded through the first safety capacitor and the second shielding part 6 floats to the ground, the external conduction electromagnetic disturbance can directly return to the ground through the first shielding part 5, so that the external conduction electromagnetic disturbance is prevented from flowing to the conduit or the ultrasonic probe; the space radiation disturbance returns to the ground through the spiral tube, the second shielding part 6, the parasitic capacitance between the second shielding part 6 and the first shielding part 5, so that the space radiation disturbance is prevented from flowing to the sensitive ultrasonic module. The arrangement mode also enables the structure of the whole rotary transformer to be simple on the basis of effectively filtering external conduction electromagnetic disturbance and space radiation disturbance. In addition, the first safety capacitor has a filtering function, further filtering of external conduction electromagnetic disturbance and space radiation disturbance can be achieved, and anti-interference performance and safety of the rotary transformer are further improved.
When the first shield part 5 is grounded through the first safety capacitor and the second shield part 6 is grounded through the second safety capacitor, the external conductive electromagnetic disturbance returns to the ground directly through the first shield part 5, and even if part of the external conductive electromagnetic disturbance does not return to the ground directly through the first shield part 5, the external conductive electromagnetic disturbance returns to the ground through the first shield part 5, the parasitic capacitors between the first shield part 5 and the second shield part 6, and the second shield part 6; the spatial radiation disturbance returns to the ground directly through the second shield 6, and even if part of the spatial radiation disturbance does not return to the ground directly through the second shield 6, it returns to the ground through the spiral tube, the second shield 6, the parasitic capacitance between the second shield 6 and the first shield 5, and the first shield 5. Compared with the grounding of a single-side shielding part, the arrangement mode has better effect of filtering external conduction electromagnetic disturbance and space radiation disturbance, and also meets the requirement of safety regulations, and the whole rotary transformer has simple structure. In addition, the first safety capacitor and the second safety capacitor have a filtering effect, external conduction electromagnetic disturbance and space radiation disturbance can be further filtered, and the anti-interference performance and the safety of the rotary transformer are further improved.
As a preferred embodiment, the first shielding part 5 is grounded in a floating manner, and the second shielding part 6 is grounded through a second safety capacitor.
When only the second shielding part 6 is grounded through the second safety capacitor, the space radiation disturbance directly returns to the ground through the second shielding part 6, so that the flow direction of the ultrasonic module sensitive to the ground is avoided; the external conductive electromagnetic disturbance is returned to the ground through the first shield part 5, the parasitic capacitance between the first shield part 5 and the second shield part 6, thereby avoiding flowing to the catheter or the ultrasonic probe. In addition, the second shielding part 6 is in impedance balance with the secondary coil 3 of the rotary transformer, and can also effectively prevent the space radiation disturbance received by the conduit from being converted into differential mode disturbance. The arrangement mode also enables the structure of the whole rotary transformer to be simple on the basis of effectively filtering external conduction electromagnetic disturbance and space radiation disturbance. In addition, the second safety capacitor has a filtering function, so that external conduction electromagnetic disturbance and space radiation disturbance can be further filtered, and the anti-interference performance and the safety of the rotary transformer are further improved.
In addition, the first shielding part 5 and the second shielding part 6 may be grounded through a high voltage capacitor, in addition to the safety capacitor, and the present application is not limited thereto.
As a preferred embodiment, the first shield part 5 and/or the second shield part 6 is a metal sheet.
Specifically, when the first shielding part 5 and/or the second shielding part 6 is a metal sheet, the metal sheet may be fixedly disposed on the substrate by a fastener, and the present application does not particularly limit the fastener, and the object of the present invention can be achieved. In addition, the metal sheet may be, but is not limited to, a copper sheet or a gold sheet, and the present application is not limited thereto. The thickness of the metal sheet is thinner, so that the volume and the cost of the rotary transformer are reduced.
As a preferred embodiment, the first shield part 5 and/or the second shield part 6 is a metal coating.
In this embodiment, the first shielding part 5 and the second shielding part 6 may be metal coatings, but not limited to copper coatings or gold coatings, and compared with copper sheets or gold sheets, the metal coatings do not need additional fixing parts to fix the metal coatings on the substrate, so that the arrangement is more convenient, and the volume and cost of the rotary transformer are further reduced. Of course, the first shielding part 5 and/or the second shielding part 6 may also be made of metal sheet, and the application is not limited thereto.
As a preferred embodiment, the first shield portion 5 covers the winding of the primary coil 2 in projection in a direction perpendicular to the primary substrate 1;
the second shield part 6 covers the winding of the secondary coil 3 in projection in a direction perpendicular to the secondary substrate 4.
Referring to fig. 2, in order to improve the filtering effect of the first shielding part 5 and the second shielding part 6, in this embodiment, the first shielding part 5 may be disposed on the projection along the direction perpendicular to the primary substrate 1, and the winding of the primary coil 2 is covered by the first shielding part 5; the second shield part 6 covers the winding of the secondary coil 3 in projection in a direction perpendicular to the secondary substrate 4. Under this kind of setting mode, can realize the effective filtering to external conduction electromagnetism disturbance and space radiation disturbance, improved resolver's interference immunity.
As a preferred embodiment, the width of the first shield part 5 is larger than the winding of the primary coil 2, and the width of the second shield part 6 is larger than the winding of the secondary coil 3.
Referring to fig. 2, in order to further improve the filtering effect of the first shielding part 5 and the second shielding part 6, in the present application, the width of the first shielding part 5 is greater than the width of the winding of the primary coil 2, and the width of the second shielding part 6 is greater than the width of the winding of the secondary coil 3, specifically, the width of the shielding part is multiple times of the width of the winding of the coil, so as to further improve the anti-interference performance of the resolver. The specific values of the widths of the first shield part 5 and the second shield part 6 are not limited in the present application and are determined according to actual conditions.
The utility model also provides a medical equipment, include such as above-mentioned resolver.
To the utility model provides an above-mentioned embodiment is referred to in the introduction of resolver's filtering theory of operation, the utility model discloses no longer describe here.
As a preferred embodiment, the medical device is an ultrasonic endoscopic imaging system or a vascular ultrasound system.
Specifically, the medical device may be an ultrasonic endoscopic imaging system or a vascular ultrasound system, or may be an ultrasonic flaw detection device, and the application is not particularly limited herein.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A rotary transformer for use in a medical device including a catheter connected to the rotary transformer, comprising a primary substrate, a secondary substrate, a primary coil disposed on a first side of the primary substrate, a secondary coil disposed on a first side of the secondary substrate, the first side of the primary substrate and the first side of the secondary substrate being oppositely disposed; it is characterized by also comprising:
a first shield portion provided on the second surface of the primary substrate;
a second shield portion disposed on the second surface of the secondary substrate and connected to the spiral tube of the duct;
at least one of the first shielding part and the second shielding part is grounded and used for guiding external conduction electromagnetic disturbance and space radiation disturbance to the ground.
2. The resolver according to claim 1, wherein the first shield portion is directly grounded, and the second shield portion is grounded in a floating manner or through a second ballast capacitor.
3. The resolver according to claim 1, wherein the first shield portion is grounded through a first safety capacitor, and the second shield portion is grounded in a floating manner or through a second safety capacitor.
4. The resolver according to claim 1, wherein the first shield portion is grounded, and the second shield portion is grounded through a second ballast capacitor.
5. The resolver according to claim 1, wherein the first shield portion and/or the second shield portion is a metal sheet.
6. The resolver according to claim 1, wherein the first shield portion and/or the second shield portion is a metal coating.
7. The rotary transformer of any one of claims 1 to 6, wherein the first shield portion covers the winding of the primary coil in a projection in a direction perpendicular to the primary substrate;
the second shielding portion covers the winding of the secondary coil in a projection in a direction perpendicular to the secondary substrate.
8. The resolver according to claim 7, wherein the first shielding portion has a width larger than a winding of the primary coil, and the second shielding portion has a width larger than a width of a winding of the secondary coil.
9. A medical device comprising a rotary transformer according to any one of claims 1 to 8.
10. The medical device of claim 9, wherein the medical device is an endoscopic ultrasound imaging system or a vascular ultrasound system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920631346.XU CN210077702U (en) | 2019-04-30 | 2019-04-30 | Rotary transformer and medical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920631346.XU CN210077702U (en) | 2019-04-30 | 2019-04-30 | Rotary transformer and medical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210077702U true CN210077702U (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920631346.XU Active CN210077702U (en) | 2019-04-30 | 2019-04-30 | Rotary transformer and medical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210077702U (en) |
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2019
- 2019-04-30 CN CN201920631346.XU patent/CN210077702U/en active Active
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