JP2018191721A - Casing watertight structure of endoscope and endoscope - Google Patents

Abstract

To provide a casing watertight structure of an endoscope in which water tightness can be improved more without applying an excessive load on the connection where a water tight holding member is interposed, and thereby the life of a product can be lengthened.SOLUTION: A casing watertight structure of an endoscope 101 includes: a case body 21 having an opening 22; a cover member 31 mounted so that a rear side may cover the opening 22 of the case body 21; a first edge section 23 for forming the opening 22 of the case body 21; a second edge section 34 of the cover member 31 joined to the first edge section 23; a packing supporting section 36 provided in the second edge section 34 and projected from the rear of the cover member 31; and a water tight packing 35 coming in contact with a rear surface 37 of the cover member 31 and a surface 36a of the packing supporting unit 36, including a close contact section 35a closely contacting to the wall surface 23a of the first edge section 23, and provided longer than the width of the surface 36a of the packing supporting unit 36.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an endoscope casing watertight structure that holds a joint portion of a cover member that closes an opening of an endoscope casing in a watertight manner.

  2. Description of the Related Art Conventionally, endoscopes that can observe internal organs of a body cavity, the inside of an engine, and the like by inserting an elongated insertion portion into a body cavity or an engine plant have been widely used.

  In particular, medical endoscopes need to be cleaned and disinfected before and after use. Therefore, the exterior case body needs to be kept watertight. For example, Patent Document 1 and Patent Document 2 disclose a watertight mechanism for a waterproof case in which a packing that keeps the inside of a case body of an operation unit of an endoscope watertight is interposed between a case body and a lid. Yes.

JP 2012-47884 A International Publication WO2016 / 027857

  However, in the watertight mechanism disclosed in Patent Document 1 and Patent Document 2, if the repulsive force of the crushed packing is large, an excessive load is generated on the case main body and the lid body, and deformation and breakage occur due to aging. There is a risk that it will not be possible.

  This causes the endoscope to break down when the cleaning solution or the disinfecting solution is immersed in the case body during cleaning and disinfection. In particular, medical endoscopes must be resistant to sterilization with chemicals, and if excessive load is applied to the joint between the case body and the lid, it is difficult to ensure water-tightness over time. .

  In addition, in order to secure water tightness by packing, it is necessary that packing interposed between the case main body and the lid body is in close contact with each other, which is in a trade-off relationship with the above problem.

  Therefore, an object of the present invention is to improve the water tightness without imposing an excessive load on the joint where the water tightness holding member is interposed, and to improve the water tightness of the endoscope casing that can prolong the product life. It is to provide a structure and an endoscope.

  An endoscope housing watertight structure according to an aspect of the present invention constitutes one of the endoscope housings, and includes a case body having an opening and another one of the housings of the endoscope. A cover member that is mounted so that a back side covers the opening of the case body, a first edge part that forms the opening of the case body, and a joint to the first edge part A second edge portion of the cover member, a packing support portion provided on the second edge portion and projecting from the back surface of the cover member, and the back surface of the cover member and the surface of the packing support portion. And a water tight packing provided longer than the width of the surface of the packing support portion.

  An endoscope according to an aspect of the present invention constitutes one of the cases of the endoscope, constitutes a case body having an opening, and another one of the cases of the endoscope, A cover member that is mounted so that a back side covers the opening of the case body, a first edge that forms the opening of the case body, and the cover member that is joined to the first edge The second edge portion, the packing support portion provided on the second edge portion and protruding from the back surface of the cover member, the back surface of the cover member and the surface of the packing support portion, An endoscope housing watertight structure is provided that includes a close contact portion that is in close contact with the wall surface of the first edge portion, and has a watertight packing provided longer than the width of the surface of the packing support portion.

  According to the present invention, it is possible to improve the water tightness without imposing an excessive load on the joint portion where the water tight holding member is interposed, and to improve the water tightness of the endoscope and to increase the product life. An endoscope can be provided.

The perspective view which showed the whole structure of the endoscope The perspective view which showed the structure of the operation part An exploded perspective view showing a case body and a lid of the operation unit Top view showing the back of the lid Sectional view of the operation unit with a lid attached to the case body Partial sectional view showing a seal member disposed on the lid The fragmentary sectional view which shows the sealing member of the state with which the cover body was mounted | worn to the case body The fragmentary sectional view which shows the sealing member arrange | positioned at the cover body of a modification The fragmentary sectional view which shows the sealing member arrange | positioned at the cover body of a modification Sectional drawing which shows the sealing member arrange | positioned at the cover body of the further modification Sectional drawing which shows the sealing member arrange | positioned at the cover body of the further modification

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
In the drawings used for the following description, the scale of each component is made different in order to make each component recognizable on the drawing. It is not limited only to the quantity of the component described in (1), the shape of the component, the ratio of the size of the component, and the relative positional relationship of each component. Moreover, in the following description, the up-down direction seen toward the paper surface of the figure may be described as the upper part and the lower part of the component.

  1 is a perspective view showing an overall configuration of an endoscope, FIG. 2 is a perspective view showing a configuration of an operation unit, FIG. 3 is an exploded perspective view showing a case body and a lid of the operation unit, and FIG. 4 is a lid. FIG. 5 is a cross-sectional view of an operation unit in which a lid is attached to the case body, FIG. 6 is a partial cross-sectional view illustrating a seal member disposed on the lid body, and FIG. It is a fragmentary sectional view which shows the seal member of the state with which the cover body was mounted | worn.

First, an example of the configuration of an endoscope according to the present invention will be described with reference to FIG.
The endoscope 101 as the endoscope system of the present embodiment has a configuration that can be introduced into a subject such as a human body and optically images a predetermined observation site in the subject.

  The subject into which the endoscope 101 is introduced is not limited to a human body, and may be another living body or an artificial object such as a machine or a building.

  The endoscope 101 includes an insertion portion 102 introduced into the subject, an operation portion 103 located at the proximal end of the insertion portion 102, and a universal cord 104 extending from a side portion of the operation portion 103. It is mainly composed.

  The insertion portion 102 includes a distal end portion 110 disposed at the distal end, a bendable bending portion 109 disposed on the proximal end side of the distal end portion 110, and an operation portion 103 disposed on the proximal end side of the bending portion 109. A flexible tube portion 108 having flexibility is connected to the tip end side of the tube.

  Note that the endoscope 101 may have a form called a so-called rigid endoscope that does not include a flexible portion in the insertion portion 102.

  The distal end portion 110 is provided with an imaging device 130 in which an imaging module is built. In addition, the operation unit 103 is provided with an angle operation knob 106 for operating the bending of the bending unit 109.

  An endoscope connector 105 connected to the external device 120 is provided at the proximal end portion of the universal cord 104. The external device 120 to which the endoscope connector 105 is connected is connected to an image display unit 121 such as a monitor via a cable.

  The endoscope 101 includes an optical fiber bundle (not shown) that transmits illumination light from the universal cord 104, the operation unit 103, the composite cable 115 inserted into the insertion unit 102, and the light source unit provided in the external device 120. )have.

  The composite cable 115 is configured to electrically connect the endoscope connector 105 and the imaging device 130. By connecting the endoscope connector 105 to the external device 120, the imaging device 130 is electrically connected to the external device 120 via the composite cable 115.

  Via the composite cable 115, power is supplied from the external device 120 to the imaging device 130, and communication between the external device 120 and the imaging device 130 is performed.

  The external device 120 is provided with an image processing unit 120a. The image processing unit 120 a generates a video signal based on the image sensor output signal output from the imaging device 130 and outputs the video signal to the image display unit 121. That is, in this embodiment, an optical image (endoscopic image) captured by the imaging device 130 is displayed on the image display unit 121 as a video.

  Note that the endoscope 101 is not limited to the configuration connected to the external device 120 or the image display unit 121, and may be configured to include a part or all of the image processing unit or the monitor, for example.

  The optical fiber bundle is configured to transmit the light emitted from the light source unit of the external device 120 to the illumination window as the illumination light emitting unit of the distal end portion 110. Further, the light source unit may be arranged on the operation unit 103 or the distal end portion 110 of the endoscope 101.

Here, the case watertight structure of the endoscope 101 according to the present embodiment will be described in detail with the operation unit 103 as an example.
As shown in FIG. 2, the operation unit 103 as a casing of the endoscope 101 includes a suction button 11 that performs suction through a treatment instrument channel that opens at the distal end portion 110, and a nozzle provided in the distal end portion 110. An air / water supply button 12 for performing air / water supply, and switches 14 and 15 for performing operations related to various observation images such as release and recording are provided. The operation unit 103 is connected to a bend preventing unit 16 that protects the connection portion of the universal cord 104 shown in FIG.

  And the operation part 103 has the case body 21 formed so that it might have internal space with a synthetic resin material etc., and the cover body 31 which is a cover member attached to this case body 21 so that attachment or detachment is possible. . The bend preventing part 16 is connected to the lid 31.

  As shown in FIG. 3, the lid 31 is mounted so as to cover the opening 22 disposed in the case body 21, and the case body side edge as a first edge that forms the opening 22 of the case body 21. The unit 23 is mounted so as to be kept watertight.

  The lid 31 is fixed to fix the universal cord 104 and the anti-folding portion 16 to a frame (both not shown) in the case body 21 through the hole of the connection portion 32 to which the anti-folding portion 16 is connected. A member is attached and is in close contact with the opening 22 side of the case body 21. Thereby, the lid body 31 is firmly fixed to the opening 22 of the case body 21.

  The case body 21 and the lid body 31 are made of, for example, a hard synthetic resin material having chemical resistance such as a disinfectant.

  As shown in FIG. 4, the lid body 31 includes a main body portion 33 and a lid body side edge portion 34 as a second edge portion as a side portion of the main body portion 33.

  The lid side edge 34 is provided with a sealing member 35 as a watertight packing made of, for example, silicon rubber, which is a watertight elastic member. The seal member 35 may be integrally formed by two-color molding when the case body 21 is molded, or may be fixed by an adhesive.

  As shown in FIG. 5, the seal member 35 is interposed between the lid body side edge portion 34 and the case body side edge portion 23 in a state where the lid body 31 is mounted so as to close the opening 22 of the case body 21. Has been.

  And when the cover body 31 covers the opening part 22, the sealing member 35 is compressed, block | closes the clearance gap between the cover body side edge part 34, and the case body side edge part 53, and closely_contact | adheres it.

Here, the configuration of the seal member 35 disposed on the lid side edge 34 of the lid 31 will be described in detail below.
As shown in FIG. 6, the cover body side edge portion 34 of the cover body 31 is formed with a support convex portion 36 that is a packing support portion that protrudes toward the back surface disposed to face the opening 22 of the case body 21. ing.

  This support convex part 36 is arrange | positioned so that the sealing member 35 may surface-contact the whole wall surface 36a used as the outer side of the cover body 31. FIG. Further, the seal member 35 is disposed so as to be in surface contact with the back surface 37 of the lid body 31 which is located outward from the support convex portion 36.

  That is, the seal member 35 is disposed on the lid side edge 34 so as to fill a corner formed by the wall surface 36 a of the support convex portion 36 and the back surface 37 of the lid 31.

  Here, the seal member 35 has an inclined surface 35b that is inclined from the support convex portion 36 toward the mounting side with the case body 21 and outward in the lid body 31, and from the inclined surface 35b to the case body. For example, the attachment side with 21 includes a close contact portion 35a having a semicircular cross section.

  The seal member 35 is formed integrally with the lid side edge portion 34 by two-color molding, or is fixed to the wall surface 36a of the support convex portion 36 and the back surface 37 of the lid body 31 with an adhesive or the like. The seal member 35 only needs to be integrally molded or fixed to at least the back surface 37 of the lid 31.

  The seal member 35 has a length L2 in the cross-sectional direction (width direction) to be attached to the opening 22 of the case body 21 rather than a length L1 in the cross-sectional direction (width direction) of the wall surface 36a of the support convex portion 36 in surface contact. Long (L1 <L2) is set.

  The sealing member 35 has a longer length d2 in the cross-sectional direction (height direction) in the lid body 31 than the length d1 fixed (fixed) to the back surface 37 of the lid body 31 (d1 < d2) It is set.

  As shown in FIG. 7, the seal member 35 disposed in the lid 31 configured as described above is arranged on the case body side in a state where the lid 31 is mounted so as to close the opening 22 of the case body 21. The close contact portion 35a is in close contact with the inner wall surface 23a of the edge portion 23 and is kept watertight.

  At this time, the seal member 35 is deformed so as to fall into the case body 21 in the process in which the contact portion 35 a contacts the inner wall surface 23 a of the case body side edge portion 23, and between the case body side edge portion 23 and the lid side edge portion 34. Is intervened.

  That is, the seal member 35 is prevented from being deformed by the support convex portion 36, but the portion extending from the support convex portion 36 of the close contact portion 35a falls toward the inclined surface 35b toward the inside of the case body 21. It deforms and comes into close contact with the inner wall surface 23a of the case body side edge 23.

  Thus, the seal member 35 falls inward when the contact portion 35a is in close contact with the inner wall surface 23a of the case body side edge portion 23, thereby releasing unnecessary contact pressure due to compression to the case body 21 and the lid body 31. The lid body 31 and the case body 21 are configured to be watertight without giving an excessive load.

  That is, if the seal member 35 is compressed only at the portion sandwiched between the support convex portion 36 of the lid body 31 and the inner wall surface 23a of the case body side edge portion 23, the deformation of the seal member 35 is limited and the compression force is reduced. Will increase. Therefore, excessive contact pressure due to the seal member 35 does not occur on the case body 21 and the lid body 31.

  Since the seal member 35 can be deformed so as to release unnecessary contact pressure due to compression, the length d2 in the cross-sectional direction (height direction) shown in FIG. 6 can be made longer. As a result, the tightly fitting portion 35a can be reliably brought into close contact with the inner wall surface 23a of the case body side edge portion 23 without applying an excessive load, and the water tightness can be further improved.

  As described above, the casing watertight structure of the endoscope 101 according to the present embodiment does not cause an excessive load when the case body 21 and the lid body 31 are fitted in a watertight manner. Deformation, breakage, etc. can be prevented.

  In addition, the portion of the seal member 35 that has fallen inside the contact portion 35 a is always urged toward and closely contacts the inner wall surface 23 a of the case body side edge portion 23. Thereby, even if the watertight holding portions of the case body 21 and the lid body 31 are deformed or moved to some extent, the contact portion 35a is easily deformed, so that followability is good and watertightness can be further secured.

  Further, when the lid body 31 is assembled to the case body 21, the pressure due to excessive adhesion of the seal member 35 is suppressed, so that the amount of force at the time of assembly is suppressed. The deformation of the lid 31 can also be prevented.

  As described above, the endoscope housing watertight structure of the present embodiment does not apply an excessive load to the watertight joint between the case body 21 and the lid body 31 in which the seal member 35 as a watertight holding member is interposed. In addition, the water tightness can be further improved and the inundation can be prevented.

  Furthermore, the casing watertight structure of the endoscope according to the present embodiment suppresses deformation and breakage of the case body 21 and the lid body 31 and improves chemical resistance. The product life of the mirror 101 can also be extended.

(Modification)
8 and 9 are partial cross-sectional views showing the sealing member disposed on the lid.
As shown in FIG. 8 and FIG. 9, when the sealing member 35 and the sealing member 35 are integrally molded by two-color molding, the inclined surface 35 b is not provided, and the supporting convex portion 36 is not provided. It is preferable in manufacturing to have a configuration in which the same plane along the wall surface 36a or a parallel plane 35c is formed.

FIG. 10 and FIG. 11 are partial cross-sectional views showing a seal member disposed on a lid body according to a further modification.
In the modification shown in FIG. 10, the seal member 35 includes a protrusion 38 a that protrudes toward the back surface 37 side of the lid-side edge portion 34. The rear surface 37 is provided with a recess 37a into which the protrusion 38a is fitted. With this configuration, even if the seal member 35 is deformed as shown in FIG. 7, the seal member 35 does not peel off from the lid side edge portion 34. The protrusions 38 a may be provided continuously along the entire circumference of the seal member 35, or may be configured to be appropriately disposed at a plurality of locations along the entire circumference of the seal member 35.

  In the modification shown in FIG. 11, the seal member 35 includes a protrusion 38 b that protrudes toward the wall surface 36 a of the support protrusion 36. The wall surface 36a is provided with a recess 36b into which the protrusion 38b is fitted. With this configuration, even if the seal member 35 is deformed as shown in FIG. 7, the seal member 35 does not peel off from the lid side edge portion 34. The protrusions 38b may be provided continuously along the entire circumference of the seal member 35, or may be configured to be appropriately disposed at a plurality of locations along the entire circumference of the seal member 35.

  In the above-described embodiment and modification, the configuration of the watertight joint portion in the operation unit 103 of the endoscope 101 has been exemplified, but the present invention is not limited to this, and of course, the present invention is applied to the watertight joint portion in the endoscope 101. The case watertight structure can be applied.

  Further, the present invention described above is not limited to the above-described embodiments and modifications, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification. An endoscope casing watertight structure with such a change is also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 11 ... Suction button 12 ... Air supply / water supply button 14, 15 ... Switches 16 ... Anti-folding part 21 ... Case body 22 ... Opening part 23 ... Case body side edge part 23a ... Inner wall surface 31 ... Cover body 32 ... Connection part 33 ... Main body Portion 34: Lid side edge 35 ... Sealing member 35a ... Contact 35a ... Contact 35b ... Inclined surface 35c ... Plane 36 ... Supporting convex part 36a ... Wall 37 ... Back 38a, 38b ... Projection 53 ... Case body side edge 101 ... Endoscope 101 ... Endoscope 101 ... Endoscope 102 ... Insertion part 103 ... Operation part 104 ... Universal cord 105 ... Endoscope connector 106 ... Angle operation knob 108 ... Flexible tube part 109 ... Bending part 110 ... Tip part 115 ... Composite cable 120 ... External device 120a ... Image processing unit 121 ... Image display unit 130 ... Imaging device

Claims (7)

A case body constituting one of the housings of the endoscope and having an opening;
A cover member that constitutes another one of the casing of the endoscope and is mounted so that a back side covers the opening of the case body;
A first edge forming the opening of the case body;
A second edge of the cover member joined to the first edge;
A packing support provided on the second edge and projecting from the back surface of the cover member;
A watertight packing provided with a close contact portion in contact with the back surface of the cover member and the surface of the packing support portion and in close contact with the wall surface of the first edge portion, which is longer than the width of the surface of the packing support portion. When,
An endoscope housing watertight structure characterized by comprising:   The endoscope watertight structure according to claim 1, wherein the watertight packing is integrally formed with the second edge portion.   The endoscope watertight structure according to claim 1, wherein the watertight packing is bonded to at least the back surface of the second edge portion.   The watertight packing is formed by an elastic member in which a portion longer than the packing support portion is deformed inward when the close contact portion is in close contact with the wall surface of the first edge portion. The endoscope casing watertight structure according to any one of claims 1 to 3.   The endoscope according to any one of claims 1 to 4, wherein the watertight packing has an inclined surface in a portion extending from the surface of the packing support portion. Enclosure watertight structure.   The endoscope water-tight structure according to claim 2, wherein the water-tight packing has a portion extending from the surface of the packing support portion substantially parallel to the surface.   An endoscope comprising the casing watertight structure of the endoscope according to any one of claims 1 to 6.

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