JP4231287B2 - Endoscope - Google Patents

Description

[0001]
【Technical field】
The present invention relates to an endoscope, and more particularly to an endoscope having a light source at a distal end rigid portion.
[0002]
[Prior art and its problems]
As shown in FIG. 1, the portable endoscope generally includes an insertion portion 3 and an operation portion 10 that include a distal end rigid portion 60 and a bending portion 50. In such an endoscope, in order to bend the bending portion 50, four wire stoppers (wire guides) 63 a, 63 b, 63 c, 63 d are formed on the inner wall surface of the insertion portion 3 at equal angular intervals. Some of them are arranged along the longitudinal direction, and one wire (not shown) for bending the bending portion 50 in a desired direction is inserted into each wire stopper.
[0003]
In the case where a plurality of LEDs 80 are used as a light source for illuminating the affected part in such an endoscope, conventionally, in order to supply power to the plurality of LEDs 80, as shown in FIG. Two lead wires 182 arranged in parallel and spaced apart from each other were connected.
[0004]
However, in such a conventional endoscope, since the lead wire 182 and the wire stoppers 63a, 63b, 63c, 63d are disposed adjacent to each other in the bending portion 50, they easily interfere with each other, and the bending portion 50 is bent. It was not uncommon for both to come into contact with each other and the lead wire to break.
[0005]
[Patent Literature]
Japanese Patent Laid-Open No. 2002-2224015
OBJECT OF THE INVENTION
Therefore, an object of the present invention is to provide an endoscope that can prevent disconnection of a lead wire.
[0007]
Summary of the Invention
In order to solve the above problems, in the endoscope of the present invention, an insertion portion having a substantially cylindrical distal end rigid portion, a bendable bending portion connected to the distal end rigid portion, and the distal end rigid portion. One or more light sources that are provided at the front end portion and irradiate illumination light in front of the distal end hard portion; a power supply harness that is inserted into the curved portion and the distal end rigid portion that supplies electric power to the light source; An endoscope having one end fixed to the distal end rigid portion, and a bending operation wire inserted into a wire guide provided on an inner wall surface of the insertion portion and extending into the operation portion . as harness hole for guiding the feeding harness relative to the light source, for the anode of each light source, and separating holes paired separated for cathode, to form a combination hole for combining the separated holes forming the pair, the pair A pair of power feeds inserted through the separation hole Guided in the curved portion after is brought close at the confluence bore harness, it is characterized in that inserted in a single coating tube disposed in the curved portion.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The endoscope 1 according to the present embodiment is a portable type, and as shown in FIG. 1, an insertion unit 3 inserted into a living body, and an operation unit 10 for performing air supply, water supply, suction, and bending, A fiberscope 2, an air / water supply unit 20, a suction unit 30, and a battery pack 40.
[0009]
The insertion portion 3 to be inserted into the patient's body includes a distal end rigid portion 60 in which three LEDs (light emitting diodes) (light sources) 80 for irradiating illumination light to the affected area in front of the distal end rigid portion 60 and a distal end rigid portion 60 are predetermined And a bending portion 50 that can be bent within a predetermined angle range in order to be disposed at a position.
[0010]
The operation unit 10 includes an air / water supply button 11, a suction button 12, a first angle knob 13, and a second angle knob 14. Among these, when an upper hole (not shown) of the air / water supply button 11 is closed, air is ejected from the air supply nozzle 64 in the distal end rigid portion 60 to remove fog on the surface of the image fiber 65 and to enter the patient's body. Insufflation is performed. When the air / water supply button 11 is pushed in, water is ejected from the water supply nozzle 66 in the distal end rigid portion 60 and the surface of the image fiber 65 is cleaned. Water or air ejected from the tip rigid portion 60 by the operation of the air / water supply button 11 is supplied from the air / water supply unit 20 connected via the air / water supply base 21.
[0011]
On the other hand, when the suction button 12 is pushed in, suction is performed from the distal end hard portion 60 by the action of the suction unit 30 connected via the feeding / suction nipple 31 to remove water droplets or mucus adhering to the surface of the image fiber 65. Or the elimination of internal air.
[0012]
Four wire stoppers (wire guides) 63a, 63b, 63c, 63d are arranged along the longitudinal direction of the insertion part 3 on the inner wall surface of the insertion part 3 at equal angular intervals. A wire (angle wire) (not shown) for bending the bending portion 50 in a desired direction is inserted and supported one by one. In addition, the bending portion 50 is provided with a plurality of substantially ring-shaped bending node rings 51 at regular intervals in the longitudinal direction, and can be bent with the bending node ring 51 as a unit. In such a configuration, the first angle knob 13 and the second angle knob 14 are operated so that the wires inserted into the left and right wire stoppers 63a and 63b and the wires inserted into the upper and lower wire stoppers 63c and 63d are respectively independent. By pulling or releasing, the bending portion 50 can be bent in a desired angle and direction. The bending portion 50 is continuously provided with a flexible portion 41 as a flexible conduit.
[0013]
Biopsy forceps and a brush are inserted into the forceps opening 42 disposed between the insertion section 3 and the operation section 10. The biopsy forceps and the brush inserted into the forceps port 42 are inserted through the forceps channel 67 and protrude from the opening portion of the distal end rigid portion 60.
[0014]
As shown in FIG. 2, in the insertion portion 3 formed by the covering rubber 61 having a metal net tube 62 arranged on the inner periphery, an air supply nozzle 64, an image fiber 65, a water supply nozzle 66, a forceps channel 67, A total of six lead wires (power supply harnesses) 82, two LEDs 80 and two for each LED 80, are inserted. Driving power is supplied to each LED 80 from the battery pack 40 through the lead wire 82. The LED 80 is arranged on the same surface as the distal end surface 68 of the distal end rigid portion 60 with a cover glass 81 disposed on the surface thereof.
[0015]
The two lead wires 82 for the respective LEDs 80 are disposed inside the two harness holes 90 provided in the elastic material having a substantially cylindrical outer shape at the distal end rigid portion 60. The harness hole 90 is provided with a separation hole 90a on the distal end face 68 side, which is composed of a pair of parallelly separated holes separated for the anode and the cathode of the LED via the power supply harness separation member 90c, and on the bending portion 50 side. Is provided with a merging hole 90b which is smoothly coupled to the separation hole 90a, approaches each other toward the curved portion 50, and forms a pair disposed adjacent to each other at the end of the harness hole 90 in parallel. Note that the merging hole 90 b may extend not only in the distal end rigid portion 60 but also in the bending portion 50 or the insertion portion 3.
[0016]
The two lead wires 82 in the harness hole 90 are arranged so as to be spaced apart in parallel by the separation hole 90a and the power supply harness separation member 90c on the LED 80 side, and arranged so as to approach the merge hole 90b toward the curved portion 50 side. Is done. By arranging in this way, the lead wire 82 and the wire stoppers 63a, 63b, 63c, 63d do not directly contact and interfere with each other, so that the lead wire 82 can be prevented from being disconnected. In FIG. 2A, for convenience of explanation, only one LED 80 is displayed, and the air supply nozzle 64, the image fiber 65, the water supply nozzle 66, the forceps channel 67, and the wire stoppers 63a, 63b, 63c, and 63d are omitted. It is.
[0017]
Further, the two lead wires 82 are disposed adjacent to each other in the covering tube 91 made of an elastic material in the bending portion 50. As shown in FIGS. 2A and 3, the three covered tubes 91 provided corresponding to the three LEDs 80 are respectively provided with wire stoppers 63a and 63d so as to avoid the wire stoppers 63a, 63b, 63c, and 63d. Between the wire stoppers 63a and 63c and between the wire stoppers 63b and 63c. By arranging in this way, the lead wire 82 and the wire stoppers 63a, 63b, 63c, 63d do not directly contact and interfere with each other, so that the lead wire 82 is not disconnected even if the bending portion 50 is bent. . In addition, although it is preferable that the covering tube 91 is arrange | positioned through the fiberscope 2 whole, the above-mentioned effect will be acquired if it is arrange | positioned in the bending part 50 at least.
[0018]
Further, since the covering tube 91 is made of an elastic material, it can be bent and deformed together with the bending of the bending portion 50. For this reason, although the bending portion 50 is bent, the covering tube 91 in the inside does not bend, so that the covering tube 91 pushes the inner wall of the bending portion 50 to deform and damage the bending portion 50. It is less likely to occur and the bending portion 50 can be bent smoothly.
[0019]
Furthermore, the filling rate of the members in the bending portion 50 can be increased by introducing the three covered tubes 91 into the bending portion 50. That is, the members can be arranged more densely in the bending portion 50. As a result, when the bending portion 50 is bent, the members in the bending portion 50 are easily bent together, so that the bending shape is rarely abnormal.
[0020]
Since the two lead wires 82 can be accommodated in the respective covering tubes 91 so as to contact each other, the lead wires 82 can be accommodated in the bending portion 50 in a compact manner.
[0021]
Furthermore, since the two lead wires 82 and the covering tube 91 are integrated, each lead wire 82 does not meander even if the bending portion 50 is bent.
[0022]
Subsequently, a modification of the present embodiment will be described.
In the present embodiment, an LED is used as a light source. However, any light source other than an LED can be applied as long as power is supplied using a lead wire.
[0023]
As long as it uses what requires LED or a lead wire as a light source which illuminates an affected part, it is applicable also to endoscopes other than a portable type.
[0024]
Further, the number of LEDs to be used may not be three as in the above embodiment.
[0025]
Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or changed within the scope of the purpose of the improvement or the idea of the present invention.
[0026]
【The invention's effect】
As described above, according to the present invention, the lead wire for applying power to the LED that is the light source of the endoscope is disposed so as to avoid the wire stopper, and therefore the lead wire is caused by the interference between the lead wire and the wire stopper. Can be prevented from breaking.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a general endoscope.
FIG. 2A is a longitudinal sectional view taken along the vertical direction including the central axis of the distal end rigid portion and the curved portion of the endoscope according to the embodiment of the present invention, and FIG. 2B is the distal end rigid portion. (C) is sectional drawing which looked at AA in (a) in the IIC direction.
FIG. 3 is a cross-sectional view of AA in FIG. 2A viewed in the III direction.
4A is a longitudinal cross-sectional view taken along the vertical direction including the central axis of the distal rigid portion and the curved portion of a conventional endoscope, and FIG. 4B is a plan view of the distal end surface of the distal rigid portion. FIG. 4C is a cross-sectional view of BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Endoscope 3 Insertion part 50 Bending part 60 Tip rigid part 63a Wire stop (wire guide)
63b Wire stopper (wire guide)
63c Wire stopper (wire guide)
63d Wire stopper (wire guide)
80 LED (light source)
82 Lead wire (power supply harness)

Claims (1)

An insertion portion having a substantially cylindrical tip rigid portion and a bendable curved portion connected to the tip rigid portion;
One or more light sources provided at the front end portion of the tip rigid portion, and irradiating illumination light in front of the tip rigid portion;
A power supply harness that supplies power to the light source and is inserted into the bending portion and the tip rigid portion, and
A bending operation wire having one end fixed to the distal end rigid portion and inserted into a wire guide provided on an inner wall surface of the insertion portion and extending into the operation portion;
In an endoscope having
As a harness hole for guiding the power supply harness to each light source in the distal end rigid portion , a separation hole forming a pair separated for the anode and cathode of each light source, and a merge hole for joining the separation holes forming the pair Form the
An internal view characterized in that a pair of power supply harnesses inserted through the pair of separation holes are brought close to each other in the merging hole, guided to the bending portion, and inserted into a single covered tube disposed in the bending portion. mirror.

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