• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for dehumidifying the lens system of an endoscope, wherein the endoscope is inserted into a dehumidifying chamber (1) and the air in the dehumidifying chamber (1) is heated by means of heating element (4) and dehumidified by means of dehumidifying granules (6). Over a longer period of time alternately positive pressure and negative pressure to the dehumidifier chamber (1) is applied, whereby alternately air is pressed into the lens system of the endoscope and removed again. The lens system of the endoscope is thereby completely dehumidified.
    公开号:AT515037A1
    申请号:T825/2013
    申请日:2013-10-28
    公开日:2015-05-15
    发明作者:Peter Ing Mang
    申请人:Peter Ing Mang；
    IPC主号:
    专利说明:

    The invention relates to a method for the non-invasive repair of moisture penetration into endoscopic CCD cameras as a result of leakage.
    Flexible video endoscopes are very expensive and highly sensitive medical examination instruments. Since they must be machine cleaned and disinfected after each examination, the epoxy bonds, including those of the CCD camera placed in the distal head of the endoscope, are subject to high stresses due to temperature differences and chemistry. Not infrequently, therefore, leaks in the lens system, which leads to the ingress of moisture and the usability of the endoscopic image. So far, this error only by the extremely costly replacement of the entire CCD unit to fix.
    The problem consists of 3 components: 1) CCD sensors are not intended for repair. Partially they are glued.
    Attempting to remove them involves a high risk of breakage, as the mechanical forces required to do so often exceed the load capacity of filigree mechanics. 2) Since the CCD sensor is a self-contained system, leaks can not be detected in a normal pressure test. 3) The lens system of an endoscope is adhered as a unit. Dismantling to remove moisture in a conventional manner will always destroy the system.
    The invention is based on the following task: localization of the leak, complete dehumidification of the complex lens system and sealing of the leak, without the need to dismantle the CCD or the CCD lens system.
    The invention will now be further elucidated with reference to FIG. 4: FIG. 1 outlines a flexible endoscope FIG. 2 shows the detail sketch of the distal end with CCD Camera FIG 3 outlines the leak test FIG. 4 shows a representation of the dehumidification chamber. The repair process is divided into 3 steps: 1) Localization leakage in the vacuum bath 2) Dehumidification process 3) Vacuum sealing of the leak Locate the leak in the vacuum bath
    The distal end of the endoscope is inserted through an airtight seal (O-ring seal) into a transparent glass jar filled with distilled water. In the first step, the pressure in the area of the CCD lens system to be dehumidified must be increased. For this purpose, the distal end of the endoscope is inserted into the upper air region of the test glass and increased by the pressure medium of the compressor. After about 10-30 minutes (pressure compensation in the lens system), the distal end of the endoscope is pushed further until the CCD objective is below the level with distilled water. Now the vessel is evacuated. Since the air in the lens system of the CCD camera is still under the elevated pressure, it will leak at the leak, visible underwater.
    dehumidification
    For this purpose, the endoscope is inserted into a pressure / vacuum-resistant dehumidifier chamber. The exhaust valve of the endoscope must be opened to prevent damage. The air in this box needs to be heated (as warm air can absorb more moisture) and completely dehumidified. The heating takes place by a thermostatically controlled heating element in the box. The air in the closed system of the chamber is forced by a pump throughout the process through a dehumidifier granule which ensures a sufficiently dry air. The actual process consists of an alternating cycle of overpressure and depression. In the overpressure phase, the warm and dry air, which can thus absorb maximum moisture, is forced through the leak into the lens system to be dehumidified. Once the pressure in the system has equalized (may take up to 30 minutes, depending on the leak), the vacuum phase follows, in which the chamber is evacuated. Part of the moist air is thus removed from the system, also until the vacuum is rebalanced. Here are also 30 minutes proven. The pressure is generated by means of a compressor, the vacuum by means of a vacuum pump.
    The system is controlled by a microcontroller and operates in practice about 24 hours in the cycle described. To test whether there is still moisture in the lens system, the cover lens can be cooled using acetone (evaporative cooling) under a microscopic view.
    If there is any residual moisture in the system, the inside of the cover lens will visibly fog. Is not "fogging" more detectable, can be started with the vacuum seal.
    Vacuum sealing the leak
    Any remnants of the old seal must be removed from a microscopic point of view. The splices in the area of the leaks as well as its close environment are to be prepared according to the state of the adhesive technique (roughen mechanically (diamond-dental micro-grippers), degrease).
    The endoscope is now heated to 60 degrees in the heating oven for one hour. The anaerobic post-curing UV adhesive used for sealing is also heated, which guarantees its lowest possible viscosity. Application of the adhesive to the leak must be made under microscope conditions during the cooling process of the endoscope to room temperature. As the air in the lens system also cools, a thermally induced pressure is created which optimally entrains the low viscosity adhesive into the leak. Once the endoscope has cooled to RT, the UV adhesive is cured by UV light source.
    权利要求:
    Claims (2)
    [1]
    PATENTANS TESTING 1. The procedure for non-invasive repair of moisture entry into endoscopic CCD cameras due to leakage is characterized in that the bonded CCD objective does not need to be disassembled or disassembled during the entire repair.
    [2]
    2. The dehumidification method according to claim 1 is characterized in that the dehumidification takes place by means of externally induced changes in the atmospheric pressure, elevated temperature and dehumidified air.
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    同族专利:
    公开号 | 公开日
    AT515037B1|2016-02-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3835861A1|1988-10-21|1990-04-26|Miele & Cie|Method of drying endoscopes|
    JP2006304906A|2005-04-27|2006-11-09|Pentax Corp|Water leakage testing apparatus for endoscope|
    EP1815782A2|2006-02-02|2007-08-08|Olympus Medical Systems Corp.|Apparatus and method for dewatering endoscope channels|
    EP2291109B1|2008-05-23|2012-07-11|Soluscope|System and method for storing a medical endoscope|CN111097056A|2020-02-26|2020-05-05|张红宾|Medical internal medicine digestive endoscope disinfection device|
    法律状态:
    2019-06-15| MM01| Lapse because of not paying annual fees|Effective date: 20181028 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA825/2013A|AT515037B1|2013-10-28|2013-10-28|Method for dehumidifying a CCD lens system of an endoscope|ATA825/2013A| AT515037B1|2013-10-28|2013-10-28|Method for dehumidifying a CCD lens system of an endoscope|
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