JP2019005186A - Medical equipment - Google Patents

Abstract

To provide medical equipment which can easily connect to a patient circuit in an alternating state, when assembling a shield member, and reduce unnecessary radiation noise.SOLUTION: Medical equipment 1 comprises: a patient circuit unit 10 which includes therein, a patient circuit board which is electrically connected to a device which is used for observing or treating a patient; a shield member 6 which shields the patient circuit unit from outside; and a connection unit 20 which is provided in the vicinity of the patient circuit unit 10, in assembling of the shield member 6, contacts the shield member 6 and conducts electrically the shield member, for electrically connecting the patient circuit unit 10 and the shield member 6.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a medical device, and more particularly to a medical device including a video processor connected to an endoscope.

  2. Description of the Related Art Conventionally, in the medical field, endoscopes that can observe organs in a body cavity and the like by inserting an elongated insertion portion into the body cavity are widely used. As such an endoscope, there is known an electronic endoscope in which a solid-state imaging device such as a charge coupled device (CCD) is disposed in an imaging unit built in the distal end of an endoscope insertion unit or the like.

  This electronic endoscope is connected to a video processor of an external device which is a medical device in order to display an observation image of an organ in a body cavity on a monitor. For example, Patent Document 1 and Patent Document 2 disclose various technologies such as EMC countermeasures and noise resistance enhancement for an endoscope system including such an electronic endoscope and a video processor.

  By the way, recent electronic endoscopes are equipped with an imaging unit that captures high-quality endoscope images. For this reason, the video processor connected to the electronic endoscope is provided with an electric circuit such as an integrated circuit (IC) that processes an image pickup signal from the image pickup unit at high speed. Thus, the electrical circuit connected to the electronic endoscope is configured as a so-called patient circuit as a floating circuit independent of other circuits that are grounded in order to ensure electrical safety of the patient.

  In addition, with the increase in processing speed, unnecessary radiation noise such as strong electromagnetic waves and static electricity is radiated from the integrated circuit (IC) and circuit pattern of the patient circuit through which high-frequency current flows. EMC measures are taken because a shield structure for reducing unnecessary radiation noise is required.

JP 2014-54318 A JP2015-188520A

  However, in a video processor for an endoscope that is a conventional medical device, it is difficult to construct the electrical connection of a patient circuit to a shielding member such as a case exterior except for a case chassis. This is a factor that increases the difficulty of EMC countermeasures that reduce noise.

  In particular, in a conventional video processor for an endoscope, the location where the patient circuit is electrically connected to the ground becomes non-uniform, and the current flow caused by unnecessary noise also becomes non-uniform, which makes the EMC countermeasures difficult. There was also a problem of raising.

  Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a medical device that can be easily electrically connected to a patient circuit when a shielding member is assembled with a simple configuration and reduces unnecessary radiation noise. And

  A medical device according to an aspect of the present invention includes a patient circuit unit in which a patient circuit board electrically connected to a device used for observation or treatment of a patient is incorporated, and a shielding member that shields the patient circuit unit from the outside. A connection unit provided in the vicinity of the patient circuit unit, disposed at a position in contact with the shielding member by assembly of the shielding member, and electrically connected to the shielding member after assembly and the patient circuit unit; It comprises.

  ADVANTAGE OF THE INVENTION According to this invention, when assembling a shielding member by simple structure, it can electrically connect with a patient circuit easily, and can provide the medical device which reduces unnecessary radiation noise.

Side perspective view showing the configuration of a video processor for an endoscope, which is a medical device A perspective view showing the video processor in a state where the top cover is slid The perspective view which shows the structure of a patient circuit unit and a connection unit same as the above The exploded perspective view showing the configuration of the connection unit The perspective view which shows the structure of a connection unit same as the above The top view which shows the structure of the connection unit of the same top view Cross-sectional view showing the configuration of the connection unit The partial sectional view of the state before the conductive member and the top cover are electrically connected to each other The partial sectional view of the state where the conductive member and the top cover are electrically connected to each other The perspective view which shows the structure of the connection unit of a 1st modification similarly. The perspective view which shows the structure of the connection unit of the 2nd modification, and a chassis same as the above The perspective view which shows the structure of the connection unit and chassis of a 3rd modification same as the above The perspective view which shows the structure of the connection unit of the 4th modification, and a chassis same as the above The perspective view which showed the back surface side of the top cover of a 5th modification same as the above

  Here, an example of an endoscope video processor that is a medical device will be described as an example. In the following description, the drawings based on each embodiment are schematic, and the relationship between the thickness and width of each part, the thickness ratio of each part, and the like are different from the actual ones. It should be noted that the drawings may include portions having different dimensional relationships and ratios between the drawings.

  The video processor in the following configuration description will be described as an example of a medical device connected to an endoscope. However, the video processor is not limited to this and is a technology applicable to various medical devices.

Hereinafter, an endoscope video processor which is a medical device of one embodiment of the present invention will be described with reference to the drawings.
1 is a perspective view showing a video processor for an endoscope, FIG. 2 is a perspective view showing a video processor in a state where a top cover is slid, and FIG. 3 is a perspective view showing configurations of a patient circuit unit and a connection unit. 4 is an exploded perspective view showing the configuration of the connection unit, FIG. 5 is a perspective view showing the configuration of the connection unit, FIG. 6 is a plan view showing the configuration of the connection unit in a top view, and FIG. 7 is a cross-sectional view showing the configuration of the connection unit 8 is a partial cross-sectional view of a state before the conductive member and the top cover are electrically connected. FIG. 9 is a partial cross-sectional view of the state where the conductive member and the top cover are electrically connected.

  A video processor (also called a video processor with built-in illumination light source or a camera control unit) 1 that is a medical device and an endoscopic image processing apparatus shown in FIG. 1 is connected to an endoscope connector of an endoscope on a front panel 2. A connector portion 3 that is a receptacle portion to which (not shown) is connected, a panel portion 4 for operation and status display, and a power switch 5 are provided.

  The video processor 1 has both sides and an upper surface covered with a conductive top cover 6 formed of metal or the like which is an exterior casing. That is, the top cover 6 is a conductive cover body having a U-shaped cross section.

  In the video processor 1, various electric circuit boards and illumination light sources such as halogen lamps, xenon lamps, and LEDs, which are not shown here, are incorporated. Note that the video processor 1 may be configured not to serve as a light source device and to perform only endoscopic image processing.

  The connector portion 3 to which an endoscope connector (not shown) is connected is provided with a plurality of electrical contacts. By connecting with the plurality of electrical contacts provided on the endoscope connector, Energization of various electrical drive configurations is performed.

  As shown in FIG. 2, the video processor 1 is configured to be assembled and fixed while sliding the top cover 6 on a conductive chassis 7 made of metal or the like. As a part of the housing chassis 7, a conductive chassis 8 made of a metal for reinforcing strength is connected to a position near the top cover 6 in the front-rear direction of the substantially central portion.

  The video processor 1 includes a patient circuit unit 10 including a patient circuit board having various circuit boards, a light source for illumination, an integrated circuit (IC etc.) constituted by an FPGA, a circuit pattern, and the like. Is provided. The patient circuit unit 10 here is disposed in the immediate vicinity of the rear of the panel portion 4 of the front panel 2 and on the upper side of the housing chassis 7.

  The patient circuit unit 10 mainly supplies power to an imaging unit provided in the endoscope, controls the endoscope, and the like. Note that the patient circuit board provided in the patient circuit unit 10 is an independent floating circuit different from other circuit boards connected to the power supply ground.

  A connection unit 20 that is electrically connected to the patient circuit unit 10 is provided in the vicinity of the patient circuit unit 10. For example, the connection unit 20 is provided in the vicinity of the side portion of the shield case 11 of the conductive box of the patient circuit unit 10 as shown in FIG.

  Specifically, as shown in FIGS. 4 and 5, the connection unit 20 includes two plate-like first and second electrode plates 21 and 22, a capacitor 23, and an insulating block 24 that is an insulating member. And a conductive member 25 obtained by processing a conductive plate having elasticity into a crank shape. The conductive member 25 may be formed integrally with the electrode plate 22.

  The first electrode plate 21 is configured as a patient circuit side electrode, and is fixed to a plate-like connection edge portion 12 provided on the shield case 11 of the patient circuit unit 10, for example, a bolt and a seat nut. Thus, the patient circuit unit 10 is fixed in an electrically conductive state. Further, the connection edge 12 may be directly connected and fixed to the patient circuit unit 10.

  The second electrode plate 22 is configured as a conductive member side electrode, and is fixed to the conductive member 25 in a state in which the second electrode plate 22 is electrically connected to the conductive member 25 by a fixing portion 32 configured by, for example, a bolt and a seated nut. The

  The first and second electrode plates 21 and 22 have holes 33 and 34, respectively. Screws 35 and 36 inserted through the holes 33 and 34 are formed in the screw holes 24a of the insulating block 24. It is screwed and fixed to the insulating block 24 as well.

  The insulating block 24 has a protrusion 28 formed between the first and second electrode plates 21 and 22 so as to protrude from the upper surface. That is, the convex portion 28 of the insulating block 24 shields the discharge between the first and second electrode plates 21 and 22 in a state where the first and second electrode plates 21 and 22 are fixed to the insulating block 24. The insulating wall portion is configured.

  The first and second electrode plates 21 and 22 are provided with terminal portions 37 and 38. The lead wires 41 and 42 of the capacitor 23 are inserted into the holes of the terminal portions 37 and 38 and soldered. The The capacitor 23 is provided in a state of being placed and held on the upper surface of the insulating block 24.

  In the capacitor 23, since the lead wires 41 and 42 are vulnerable to physical stress and easily deformed, the electrode plates 21 and 22 are fixed to the upper surface of the insulating block 24, so that the lead wires 41 and 42 are caused by external force such as vibration. It is possible to prevent breakage and deformation. Further, the insulating block 24 may be provided below, above or on the side of the capacitor 23.

  In addition, the lead wires 41 and 42 of the capacitor 23 are deformed and the distance between the first and second electrode plates 21 and 22 is reduced, thereby preventing discharge between the first and second electrode plates 21 and 22. It is also possible to prevent the creepage space distance from being secured.

  The connection unit 20 configured as described above is provided with the convex portion 28 of the insulating block 24 between the first and second electrode plates 21 and 22, and is a plan view as viewed from above shown in FIG. 6. , The necessary creeping distances L1 and L2 are always maintained for the connection unit that can electrically isolate the patient circuit unit 10 and the top cover 6.

  Further, the connection unit 20 is configured such that the projection 28 between the first and second electrode plates 21 and 22 causes the electromagnetic waves, static electricity, and the like from the connection unit 20 in the cross-sectional direction shown in FIG. The creepage distance L3 necessary for preventing discharge from the plate 21 to the second electrode plate 22 is always maintained.

  Note that the convex portion 28 of the insulating block 24 has a height H and a width D in order to ensure the necessary creepage distances L1, L2, and L3 for preventing discharge from the first electrode plate 21 to the second electrode plate 22. The length dimension (see FIG. 7) is defined.

  As shown in FIG. 2, the video processor 1 configured as described above is assembled and fixed to the housing chassis 7 while sliding the top cover 6. At this time, as shown in FIGS. 8 and 9, the back surface 9 of the top cover 6 comes into contact with the housing contact surface 29 which is the uppermost surface bent in a crank shape of the conductive member 25 of the connection unit 20.

  It should be noted that the conductive member 25 of the connection unit 20 is moved by elastic deformation so that the housing contact surface 29 comes into contact with the back surface 9 of the top cover 6 reliably and falls down in accordance with the sliding direction of the top cover 6. The length dimension to the upper side is defined so as to be urged toward the rear surface 9.

  As described above, in the video processor 1 that is a medical device according to the present embodiment, the patient circuit unit 10 and the top cover 6 that is an exterior housing are electrically connected to the connection unit 20.

  In addition, since the connection unit 20 connects the patient circuit unit 10 and the top cover 6 in an AC manner, a current that becomes unnecessary radiation noise flows from the patient circuit unit 10 to the top cover 6, and further, the direct current is cut. It is also possible to prevent the static electricity from entering the patient circuit unit 10 from the top cover 6.

  Therefore, the patient circuit unit 10 is electrically connected to the top cover 6 that is a shielding member (cannot be electrically connected), and unnecessary radiation such as electromagnetic waves and static electricity generated from a patient circuit board through which a high-frequency current provided therein flows. Noise is reduced and EMC countermeasures are taken.

  Further, the video processor 1 is configured such that the patient circuit unit 10 can be easily connected to the ground at the same time when the top cover 6 is assembled (cannot be connected to the same potential).

  From the above, the video processor 1 that is a medical device can be easily electrically connected to the patient circuit unit 10 when the top cover 6 of the shielding member that is a case exterior is assembled with a simple configuration, and reduces unnecessary radiation noise. It becomes the structure which can do.

(First modification)
FIG. 10 is a perspective view showing the configuration of the connection unit of the first modification.
As shown in FIG. 10, the connection unit 20 has a conductive gasket (soft gasket) 45, which is a conductive member in which a conductive cloth is covered with an elastic member such as sponge, on the housing contact surface 29 of the conductive member 25. May be.

  As described above, the video processor 1 which is a medical device is provided with the elastic conductive gasket 45 on the housing contact surface 29, so that the electrical contact between the conductive member 25 and the top cover 6 which is a shielding member is achieved. It becomes more reliable and it can be set as the structure which can perform the ground connection to the top cover 6 of the patient circuit unit 10 more reliably.

  Note that the conductive gasket 45 is movable so as to be crushed by elasticity, so that the conductive gasket 45 comes into contact with the back surface 9 of the top cover 6 with certainty.

(Second modification)
FIG. 11 is a perspective view showing the configuration of the connection unit and chassis of the second modification.
As shown in FIG. 11, the connection unit 20 and the chassis 8 may be electrically connected, and a plurality of conductive gaskets 46 that are conductive members may be attached to the upper surface of the chassis 8.

  The conductive member 25 of the connection unit 20 is electrically connected to one end of a ground wire 51 that is an electric wire by a screw 52, and the other end of the ground wire 51 is electrically connected to the chassis 8 by a screw 53.

  Here, a recess 8a of the chassis 8 is formed, and a screw 53 for fastening the ground wire 51 is screwed into the recess 8a.

  As described above, the video processor 1 that is a medical device is provided with the plurality of conductive gaskets 45 on the electrically connected chassis 8, so that the electrical contact between the conductive member 25 and the top cover 6 that is a shielding member is achieved. In addition, the plurality of conductive gaskets 46 on the chassis 8 are crushed so that they are urged toward the top cover 6 and are electrically connected to each other so that the AC connection of the patient circuit unit 10 to the top cover 6 can be more reliably performed It can be set as the structure which can be performed.

(Third Modification)
FIG. 12 is a perspective view showing the configuration of the connection unit and chassis of the third modification.
The electrical conduction between the conductive member 25 of the connection unit 20 and the chassis 8 does not use the ground wire 51 described in the second modification, but directly connects the conductive member 25 with a screw 47 as shown in FIG. You may connect with the chassis 8.

  In this configuration, the conductive member 25 of the connection unit 20 is electrically connected to the top cover 6 via the plurality of conductive gaskets 46 on the chassis 8.

(Fourth modification)
FIG. 13 is a perspective view showing configurations of a connection unit and a chassis according to a fourth modification.
Instead of the plurality of conductive gaskets 46 on the chassis 8, as shown in FIG. 13, a plurality of leaf springs 49, which are conductive members having conductive elasticity formed of metal or the like, may be used.

(Fifth modification)
FIG. 14 is a perspective view showing the back side of the top cover of the fifth modified example.
Even if the plurality of conductive gaskets 46 are not provided on the chassis 8, a plurality of conductive gaskets 46 as conductive members are provided on the back surface 9 of the top cover 6 in accordance with the position of the chassis 8, as shown in FIG. Also good. The plurality of conductive gaskets 46 here may be changed to the plurality of leaf springs 49 exemplified in the fourth modification.

  In the configurations of the second to fifth modifications, the plurality of conductive gaskets 46 or the plurality of leaf springs 49 are arranged depending on the size of the patient circuit board built in the patient circuit unit 10 and the antenna length. It is determined and provided at an interval and a position for preventing resonance of high-frequency noise generated from the patient circuit board.

  Furthermore, in the configurations of the second to fifth modifications, the plurality of conductive gaskets 46 or the plurality of leaf springs 49 are exemplified, but the present invention is not limited thereto, and conductive rubber, conductive springs, etc. A conductive member having the elasticity of may be used.

  The configurations of the embodiments and modified examples described above may be combined with each other, and various modifications can be made without departing from the scope of the invention in the implementation stage. Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

  For example, even if some constituent requirements are deleted from all the constituent requirements shown in each embodiment, the stated requirements can be deleted if the stated problem can be solved and the stated effect can be obtained. The structure thus constructed can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1 ... Video processor 2 ... Front panel 3 ... Connector part 4 ... Panel part 5 ... Power switch 6 ... Top cover 7 ... Chassis chassis 8 ... Chassis 8a ... Recess 9 ... Back surface 10 ... Patient circuit unit 11 ... Shield case 12 ... Connection Edge 20 ... Connection unit 21 ... first electrode plate 22 ... second electrode plate 23 ... capacitor 24 ... insulating block 24a ... screw hole 25 ... conductive member 28 ... convex 29 ... housing contact surfaces 31, 32 ... fixed Part 33, 34 ... Hole 35, 36 ... Screw 37, 38 ... Terminal part 41, 42 ... Lead wire 45, 46 ... Conductive gasket 47, 52, 53 ... Screw 49 ... Leaf spring 51 ... Ground wire L1, L2, L3 ... Creepage distance

Claims (7)

A patient circuit unit containing a patient circuit board electrically connected to a device used for patient observation or treatment;
A shielding member that shields the patient circuit unit from the outside;
A connection unit provided in the vicinity of the patient circuit unit, disposed at a position in contact with the shielding member by assembly of the shielding member, and electrically connected to the shielding member after assembly and the patient circuit unit;
A medical device characterized by comprising:   The medical device according to claim 1, wherein the connection unit includes a member having elasticity so as to urge and contact the shielding member. The connection unit is
A capacitor,
A first electrode connected to one lead of the capacitor and electrically connected to the patient circuit unit;
A second electrode connected to the other lead wire of the capacitor and electrically connected to the conductive member;
The medical device according to claim 2, comprising:   The medical device according to claim 3, further comprising an insulating member having a convex portion with a creepage distance defined between the first electrode and the second electrode to prevent discharge. machine. The connection unit is
Having a chassis to which the shielding member is assembled at one end, and the other end being electrically connected to the patient circuit unit;
The medical device according to claim 1, wherein a plurality of conductive members that are in electrical contact with the shielding member when the shielding member is assembled to the chassis are provided.   The medical device according to claim 5, wherein the plurality of conductive members have elasticity so as to be biased toward and contact the shielding member.   The medical device according to claim 1, further comprising a connector portion to which an endoscope connector of the endoscope is connected.

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