JP2003169777A - Battery type light source device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery type light source device for an endoscope capable of suppressing the outer surface temperature of an external member to low, quickly cooling the inside of the light source device and a lamp, even if using the large light quantity lamp, and dipping it in liquid. <P>SOLUTION: This battery type light source device 3 for (the endoscope is detachably attached to an endoscope body, incorporates the lamp 33a and batteries for feeding an irradiation light to a light incident end part of a light guide fiber of the endoscope body, and is liquid-tightly constituted. This battery type light source device 3 is formed with, at least, an opening part 52 radiating the heat emitted from the lamp 33a at the external member 40 of the light source body part and provided with a closed waterproofing and air permeable member 53 capable of passing the air to the opening part 52 and preventing the liquid from intruding inside the light source body part. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery type light source device for an endoscope which is detachably mounted on an endoscope body. 2. Description of the Related Art At present, endoscopes are widely used in medical and industrial fields. In this endoscope, a site to be diagnosed or inspected is inside a living body, or inside a plant, equipment, or the like. For this reason, a general endoscope prepares a light source device as an external device of the endoscope main body, and provides illumination light from an illumination lamp attached to a light source unit in the light source device to the endoscope main body. Light is guided to the light guide fiber, and the illumination light guided by the light guide fiber is emitted from the illumination window on the distal end side of the insertion portion to illuminate the inspection target site. The light source device generally turns on an illumination lamp inside the light source device using a power supply supplied from a commercial power supply. On the other hand, for example, Japanese Patent Application Laid-Open No. 11-1537
As a light source device disclosed in Japanese Patent No. 59, a battery type light source device for an endoscope which uses a battery such as a dry battery as a power source and is detachably attachable to an operation unit of an endoscope body has been proposed. An endoscope combined with such a battery type light source device for an endoscope is easy to carry and can be used in a place without a power source, so that it is suitable for use in an emergency or outdoors. ing. However, the above-mentioned conventional battery type light source device for an endoscope is configured to be sealed from the outside so that it can be immersed in a liquid at the time of washing or disinfection. For this reason, in the conventional battery type light source device for an endoscope, there is no escape place for the heat generated from the lamp, and the exterior member may be heated when the lamp is turned on for a long time. Therefore, for example, Japanese Patent Application Laid-Open No. H11-153
No. 759, the battery type light source device for an endoscope,
Disperse heat to the surroundings by providing an air layer between the lamp holding portion holding the lamp and the exterior member, or by configuring the periphery of the lamp with a member having high thermal conductivity such as a copper alloy. Alternatively, countermeasures have been taken such as dispersing heat to the endoscope body by bringing a member formed of a copper alloy or the like around the lamp into contact with a metal member forming a connection portion with the endoscope body. Thus, the temperature of the outer surface of the exterior member, which rises due to the heat generated from the lamp, is suppressed to a level that does not cause any problem. [0006] However, the battery type light source device for an endoscope described in Japanese Patent Application Laid-Open No. H11-153759 has a sealed structure. In addition, there is a possibility that the temperature of the outer surface of the exterior member rises to an unacceptable temperature. For this reason, in the battery type light source device for an endoscope described in Japanese Patent Application Laid-Open No. H11-153759, the range of selection of the lamp has been narrowed. Further, the battery type light source device for an endoscope described in Japanese Patent Application Laid-Open No. H11-153759 has a sealed structure, so that it takes time until the inside of the light source and the lamp cool down after the lamp is turned off, and the lamp needs to be replaced. There is a risk that the time required to perform the operation may be lost. The present invention has been made in view of the above circumstances, and even when a lamp with a larger amount of light is used, the outer surface temperature of the exterior member is kept lower, and the inside of the light source device and the lamp are more easily cooled. An object of the present invention is to provide a battery type light source device for an endoscope that can be immersed in a liquid. In order to achieve the above-mentioned object, the present invention removably attaches to an endoscope body having a light guide fiber for guiding illumination light for illuminating a subject. In a battery-type light source device having a built-in lamp for supplying illumination light to a light incident end of the light guide fiber of the endoscope main body and a power supply unit of the lamp and having a watertight structure, Forming at least one opening for radiating the generated heat in the body exterior;
A water-permeable ventilation member that allows gas to pass through and prevents liquid from entering the exterior of the main body is provided in the opening. With this configuration, even when a lamp with a larger amount of light is used, the battery type for an endoscope, in which the outer surface temperature of the exterior member is kept lower, the inside of the light source device and the lamp are easier to cool, and can be immersed in liquid. A light source device is realized. Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 6 relate to a first embodiment of the present invention, and FIG. 1 is an external view showing an endoscope provided with the first embodiment of the present invention. 2 is an assembly explanatory view showing the configuration of the battery-type light source device of FIG. 1, FIG. 3 is an external view showing the battery-type light source device of FIG. 2, FIG.
5 is an explanatory diagram when the battery-type light source device is mounted on the endoscope main body, and FIG. 6 is an explanatory diagram when the lamp of the battery-type light source device is turned on from the state of FIG. 5 and the endoscope main body is gripped. is there. As shown in FIG. 1, an endoscope 1 according to a first embodiment of the present invention comprises an endoscope body 2 for observing and treating a body cavity, and an endoscope 1 attached to and detached from the endoscope body 2. It comprises a substantially T-shaped endoscope battery-type light source device (hereinafter simply referred to as a battery-type light source device) 3 which can be freely mounted and has a lamp and a battery described later. The endoscope main body 2 has an elongated insertion portion 11.
An operating unit 12 also serving as a grip provided at the rear end of the insertion unit 11; an eyepiece 13 formed at the rear end of the operating unit 12; and a light protruding from the side of the operating unit 12. A guide base 14 is provided. The endoscope body 2 includes:
A connection base 15 of the battery-type light source device 3 can be detachably attached to an end of the light guide base 14. The light guide base 14 may be configured so that the battery type light source device 3 and a light guide cable (not shown) are selectively attached thereto and connected to a light source device for commercial power supply (not shown). The insertion portion 11 has a front end portion 21 formed at the front end thereof, a bending portion 22 formed at the rear end of the front end portion 21 and capable of bending. Flexible part 2 formed up to the front end of 12
And 3. The operating section 12 is provided with a bending operation lever 24 at a rear end side of a grip section 12a gripped by an operator. The bending operation lever 24 can bend the bending portion 22 by a rotation operation. The operation unit 12 includes a suction button 25 for performing a suction operation, and a suction base 2 so as to protrude from the vicinity of a base end of the suction button 25.
6 are provided. The suction base 26 is connected to a suction device via a tube (not shown). When the suction button 25 is pressed, the body fluid or the like can be sucked through the suction mouthpiece 26 communicating with a suction channel (not shown). The operation part 12 has a forceps insertion port 27 for inserting a treatment tool such as forceps at the front side thereof.
The forceps insertion port 27 is internally connected to the suction channel. This forceps insertion port 27 is usually provided with a forceps stopper 28. The insertion portion 11 has a light guide fiber (not shown) for guiding illumination light inserted therein. The rear end of the light guide fiber is fixed in the light guide base 14 via the operation section 12. The light guide base 14 is screwed into a male screw part 14a formed on the outer periphery of the light guide base 14 with a female screw part (not shown) formed in the connection base 15 of the battery type light source apparatus 3, thereby attaching and detaching the battery type light source apparatus 3. It is designed to be freely mounted. When the lamp of the battery type light source device 3 described below emits light, the endoscope 1 applies illumination light from this lamp to a light incident end face of a light guide fiber (not shown) of the light guide base 14. Supplied. The supplied illumination light is guided by the light guide fiber, and illuminates an object such as a diseased part from an illumination window (not shown) of the endoscope 21, that is, a light emission end face. The illuminated subject forms an optical image at an image forming position by an objective lens attached to an observation window (not shown) adjacent to the illumination window. At this image forming position, the distal end face of an image guide fiber (not shown) is arranged, and the formed optical image is transmitted to the end face on the eyepiece section 13 side. The transmitted optical image can be magnified and observed through an eyepiece (not shown) attached to an eyepiece window of the eyepiece 13. As shown in FIG. 2, the battery type light source device 3 has a substantially T-shaped light source main body 31 provided with the connection base 15 and a lid detachably attached to the light source main body 31 by screwing. It comprises a body 32 and a lamp part 33. The battery-type light source device 3 includes O-rings 34 and 35 with the lid 32 and the lamp 33 attached, respectively.
Thereby, it is configured to be kept watertight. The light source body 31 includes a substantially cylindrical battery housing 36 and a substantially rectangular parallelepiped lamp housing 37. The exterior members 40 of the battery housing portion 36 and the lamp housing portion 37 are integrally formed in a substantially T-shape from a hard material having low thermal conductivity such as polysulfone and having an electrically insulating property. The battery housing 36 is
For example, a battery 41 such as a single dry battery
Is provided with a battery housing member 42 formed of a substantially cylindrical shape by a conductive member capable of housing the battery. The lamp accommodating portion 37 is provided on its inner peripheral surface side with a lamp accommodating holder 43 formed of a conductive member for accommodating the lamp portion 33 and having a substantially cylindrical shape (see FIG. 4). In addition, the lamp housing portion 37 is provided at one end thereof with the substantially cylindrical connection base 15 having the female screw portion so as to be rotatable. The lamp section 33 holds and holds the lamp 33a, and is in contact with the rear end electrode and the side electrode of the lamp 33a.
Further, the lamp section 33 has a protruding electrical contact 33b that is electrically connected to a side electrode of the lamp 33a. The light source main body 31 is provided with the lamp portion 33 in the lamp housing holder 43 in the lamp housing portion 37.
When the battery 41 is accommodated in the battery accommodating member 42 of the battery accommodating portion 36 and the lid 32 is attached, the negative pole of the battery 41 is The contacts are brought into contact with each other, and the lamp storage holder 43 is connected via an electric conduction path (not shown).
From the rear end side of the ramp 33 (not shown).
Contact conduction is always made with the pole side electrical contact. On the other hand, the light source main body 31 has a positive electrical contact (not shown), which is in contact with the positive electrode of the battery 41 and extends from the lamp housing holder 43.
Then, the light source main body 31 rotates the lamp housing portion 37 by approximately 90 degrees with respect to the connection base 15 (see FIG. 6), so that the extended portion of the positive electrode side electrical contact (not shown) ) Is brought into contact with the protruding electrical contact 33 b of the lamp section 33, so that the power supply from the battery 41 is performed. That is, the light source body 31
Has a switch mechanism for turning on and off the lamp 33a by rotating the lamp housing 37 with respect to the connection base 15. Then, the battery-type light source device 3 turns the lamp 33 a by rotating the lamp housing portion 37 by approximately 90 degrees with respect to the connection base 15, and illuminates the light guide to the light guide of the endoscope body 2. Is supplied. At this time, since the conventional battery-type light source device has a sealed structure, when a lamp with a larger light amount is used, the outer surface of the light source body 31 may rise to an unacceptable temperature. In the present embodiment, at least one opening for radiating the heat generated by the lamp 33a is formed in the exterior member 40 of the light source body 31, so that gas can pass through the opening, and A waterproof ventilation member is provided to prevent liquid from entering the light source main body 31. That is, as shown in FIG. 3 and FIG. 4, the lamp storage holder 43 provided in the lamp
For example, four substantially circular openings 51 are formed on the same circumferential surface at equal intervals on the nearby side peripheral surface (only one opening 51 is shown in FIG. 4). The exterior member 40 has one substantially circular opening 52 at a position facing one of the openings 51 formed on the side surface. The opening 52 is provided by closing a substantially circular sheet-shaped waterproof ventilation member 53 that allows gas to pass through the inside and outside of the exterior member 40 and prevents liquid from entering the inside. The waterproof ventilation member 53 is formed from a sheet such as a PTFE (polytetrafluoroethylene resin) porous membrane, a polypropylene porous membrane, or the like. The diameter of the waterproof ventilation member 53 is the same as that of the opening 5.
2 is set larger than the diameter. The waterproof ventilation member 53 is sandwiched between the substantially donut-shaped pressing member 55 having an opening 54 having the same size as the opening 52 and the exterior member 40, and The portion held between the exterior member 40 and the pressing member 55 is compressed to such an extent that watertightness is maintained. still,
The pressing member 55 is formed of a hard material having a low thermal conductivity such as polysulfone and an electrically insulating property. The holding member 55 is fixed to the exterior member 40 by, for example, four fixing screws 56. In the battery type light source device 3 configured as described above, the lamp 33a and the battery 41 are loaded, and the connection base 15 is connected to the light guide base 14 of the endoscope body 2 to constitute the endoscope 1. . At this time, as shown in FIG. 5, in the battery-type light source device 3, the longitudinal axis 61 of the endoscope main body 2 and the longitudinal axis 62 of the battery housing 36 are parallel, and the lamp 33 a is off. Next, the surgeon grasps the endoscope main body 2 so that the longitudinal axis 61 of the endoscope main body 2 and the longitudinal axis 62 of the battery-type light source device 3 are perpendicular to each other as shown in FIG. By rotating the battery-type light source device 3 around the longitudinal axis 63 of the lamp housing 37, the lamp 33a is turned on by the above-described switch mechanism. Then, the surgeon inserts the insertion portion 11 of the endoscope main body 2 into a target site and performs a predetermined procedure. At this time, since the waterproof ventilation member 53 is located in the upper part of FIG.
The gas generated in step (a) quickly escapes to the outside of the exterior member 40 and is radiated. Further, the battery-type light source device 3 includes:
Since the opening 51 is closed by the waterproof ventilation member 53, watertightness is maintained and no liquid enters. As a result, when the endoscope main body 2 is gripped while the lamp 33a is lit, the opening of the battery-type light source device 3 of this embodiment is positioned above the lamp 33a. Since the 51 is provided, more efficient heat radiation is performed. Further, the battery type light source device 3 can be immersed in a liquid at the time of cleaning or disinfection. Therefore, the battery-type light source device 3 of the present embodiment suppresses the outer surface temperature of the exterior member 40 even when a lamp with a larger amount of light is selected and used, and the inside of the light source device and the lamp are more easily cooled. Become. (Second Embodiment) FIGS. 7 to 9 relate to a second embodiment of the present invention, and FIG. 7 is an external view showing a battery-type light source device according to a second embodiment of the present invention. 8 is an enlarged view including a partial cross section of the battery type light source device of FIG.
FIG. 9 is a sectional view taken along line BB of FIG. 8. In the first embodiment, the present invention is applied to a substantially T-shaped battery-type light source device 3, but the second embodiment is applied to a battery-type light source device configured in a uniaxial direction. It is configured by applying the present invention. The other configuration is almost the same as that of the first embodiment, so that the description is omitted, and the same configuration is denoted by the same reference numeral. As shown in FIG. 7, the battery type light source device 101 according to the second embodiment is detachably mounted on the light guide base 14 of the endoscope body 2 described in the first embodiment. The lamp 3 with a possible connection base 102
A lamp housing 103 for housing the battery 4a;
1 and a cover 105 detachable by screwing, and a switch 106 for turning on or off the lamp 33a. The switch unit 106 is provided with respective electric contacts (not shown) so that the turning on and off of the lamp 33a can be switched by a rotation operation of about 90 degrees. The connection base 102 is provided with a male screw portion 14 a of the light guide base 14.
Is formed with a female screw portion (not shown) that can be screwed. As shown in FIGS. 8 and 9, the lamp accommodating portion 103 includes, in order from the inside, an insertion member 107 formed of a conductive member such as a copper alloy for accommodating the lamp 33a and having a substantially cylindrical shape. It is composed of a lamp exterior member 108 made of a hard material having low thermal conductivity such as polysulfone and having an electrical insulating property and having a substantially cylindrical shape, and a heat radiation exterior member 109 also made of polysulfone or the like. In the insert member 107 and the lamp exterior member 108, a plurality of slits 110 and 111 each having a sufficiently permeable width are formed circumferentially at equal intervals on the side peripheral surface near the lamp 33a. Have been. The heat-radiating exterior member 109 is formed in a substantially cylindrical shape having flat portions 112 and 113 at opposed positions. This heat radiation exterior member 1
09 has an O-ring receiving portion 114 and a small-diameter portion 11.
5 and a large diameter portion 116. Each of the flat portions 112 and 113 has a substantially circular opening 52B. The opening 5
2B has a structure similar to that of the first embodiment, and is closed by a waterproof ventilation member 53. More specifically, the waterproof ventilation member 53 has an opening 54B having the same size as the opening 52B as in the first embodiment.
Is formed between the substantially donut-shaped pressing member 55B and the flat portions 112 and 113, and the watertightness between the held portion and the flat portions 112 and 113 and the pressing member 55B is maintained. The part that is pinched to the extent that it is compressed is compressed. The pressing member 55B is fixed to the flat portions 112 and 113 by four fixing screws 56. The small diameter portion 115 is fitted to the small diameter portion 117 of the lamp exterior member 108 in a clearance fit. The large-diameter portion 116 is set to have such an inner diameter that a space that allows sufficient ventilation can be obtained between the large-diameter portion 116 and the small-diameter portion 117. Further, the heat radiating exterior member 109 is sandwiched between a step end surface 118 of the lamp exterior member 108 and an end surface 120 of a battery exterior member 119 to be described later by a clearance fit, and is rotatable by two O-rings 121. It is configured. Although the heat radiation exterior member 109 is manually rotatable, it is provided so as not to rotate unintentionally. The battery storage section 104 is an insertion member (not shown) for storing the battery 41 in order from the inside.
And a battery part exterior member 119 formed of a hard material having a low thermal conductivity such as polysulfone and having an electrical insulating property and having a substantially cylindrical shape. The insertion member of the battery storage unit 104 may be configured to extend to the lamp storage unit 103 and also serve as the insertion member 107 of the lamp storage unit 103. The battery part exterior member 119 has a female screw part 122 formed on the inner peripheral surface at the end of the lamp 33a side, and the external thread part 12 of the lamp part exterior member 108 is formed.
3 and fixed by bonding. The battery type light source device 101 thus configured is loaded with the lamp 33a and the battery 41 in the same manner as described in the first embodiment, and
2 is connected to the light guide base 14 of the endoscope body 2 to form an endoscope. At this time, the battery type light source device 101
Indicates that the lamp 33a is turned off. Next, the surgeon grasps the endoscope body 2 and
The switch unit 106 is rotated approximately 90 degrees in the lighting direction, and the lamp 33a is turned on by the switch mechanism. At this time,
When the operator grips the endoscope main body 2, the waterproof ventilation member 5
The heat dissipating exterior member 109 is rotated so that 3 faces upward. Then, the surgeon operates the insertion section 1 of the endoscope main body 2.
1 is inserted into a target site, and a predetermined procedure is performed. At this time, in the battery-type light source device 101, the gas generated by the lamp 33a quickly escapes to the outside of the heat radiation exterior member 109 via the waterproof ventilation member 53 facing upward, and is radiated.
As a result, the battery-type light source device 1 of the second embodiment
01 obtains the following effects in addition to obtaining the same effects as those of the first embodiment. In the battery type light source device 101 according to the second embodiment, since the heat radiating exterior member 109 is rotatably provided, the position of the waterproof ventilation member 53 is adjusted in accordance with the angle at which the endoscope main body 2 is gripped. It can be set arbitrarily, can dissipate heat more effectively, does not need to be attached to the endoscope body 2 in a fixed direction, and the structure and assembly of the connection base 102 are simple. In the battery-type light source device 101 of the second embodiment, since the waterproof ventilation member 53 is provided at a position facing the battery-type light source device 101, the flow of gas is improved, and the heat radiation exterior member 1 is provided.
09 lowers the outer surface temperature, and the use of a lamp with a larger light amount becomes possible. Furthermore, in the battery-type light source device 101 according to the second embodiment, since the internal heat is more easily cooled, the loss of time until lamp replacement is further reduced. The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the invention. [Supplementary Note] (Supplementary Note 1) The light guide fiber of the endoscope main body can be detachably attached to an endoscope main body having a light guide fiber for guiding illumination light for illuminating a subject. A lamp for supplying illumination light to a light incident end of the lamp, and a battery as a power supply unit of the lamp, wherein at least one opening for radiating heat generated by the lamp is provided as a main body. Formed on the exterior,
A battery-type light source device for an endoscope, wherein a water-permeable ventilation member that allows gas to pass through the opening and that prevents liquid from entering the exterior of the main body is provided. (Additional Item 2) The battery type light source device for an endoscope according to Additional Item 1, wherein the opening is provided near the lamp on the exterior of the main body. (Supplementary Note 3) The opening is provided so as to be located above the lamp when the endoscope main body is gripped while the lamp is turned on. Item 2. A battery type light source device for an endoscope according to Item 1. (Additional Item 4) The battery type light source device for an endoscope according to Additional Item 1, wherein the opening is provided so as to be set at a predetermined position in a circumferential direction of the exterior of the main body. As described above, according to the present invention, even when a lamp with a larger light intensity is used, the temperature of the outer surface of the exterior member is kept lower and the inside of the light source device and the lamp are cooled. A battery-type light source device for an endoscope that can be easily immersed in a liquid can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing an endoscope provided with a first embodiment of the present invention. FIG. 2 is an assembly explanatory view showing a configuration of a battery-type light source device in FIG. 3 is an external view showing the battery type light source device of FIG. 2 [FIG. 4] AA sectional view of FIG. 3 [FIG. 5] Explanatory view when the battery type light source device is mounted on the endoscope main body [FIG. Explanatory view when the lamp of the battery type light source device is turned on from the state of 5 and the endoscope main body is gripped. FIG. 7 is an external view showing a battery type light source device according to a second embodiment of the present invention. FIG. 9 is an enlarged view including a partial cross section of the battery-type light source device of FIG. 7; FIG. 9 is a cross-sectional view taken along the line BB of FIG. 8; (Battery type light source device for endoscope) 14 ... Light guide base 31 ... Light source main body 32 ... Ladder 33 ... Lamp 33a ... Lamp 34, 5 O-ring 36 Battery storage part 37 Lamp storage part 40 Exterior member 41 Battery 42 Battery storage member 43 Lamp storage holders 51, 52, 54 Opening 53 Waterproof ventilation member 55 Press member 56 Fixing screw

Claims (1)

Claims: 1. An endoscope having a light guide fiber for guiding illumination light for illuminating a subject, the light guide fiber being detachably mountable on the endoscope body. A lamp for supplying illumination light to a light incident end of the lamp, and a battery as a power supply unit of the lamp, wherein the battery-type light source device is configured to be watertight, and has at least one opening for radiating heat generated by the lamp. A battery-type light source device for an endoscope, comprising a waterproof ventilating member formed on an exterior and capable of passing gas through the opening and preventing liquid from entering the exterior of the main body.