JP2000089132A - Tip part of side-looking endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct an endoscope without increase in an outer diameter of a tip part even in the case of an side-looking endoscope provided with plural light-emitting diodes on the outer periphery of an object optical system. SOLUTION: A substrate 21 provided with plural light-emitting diodes 19 assembled in one piece is in a plane containing the endoscope center axis 25. Similarly, a part of an object 1st surface lens is also in the plane containing the endoscope center axis 25. For a same outer diameter, the largest area is available in the plane containing the endoscope center axis 25, therefore, it is possible to reduce the outer diameter of the tip part 3 of the endoscope as small as possible by arranging the light-emitting diode 19 part group on this plane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end of a side view endoscope, and more particularly, to a distal end of a side view endoscope having a light emitting diode as a lighting means.

[0002]

2. Description of the Related Art Hitherto, there has been proposed a structure in which a light-emitting light source such as a light-emitting diode is provided as a lighting means at a distal end portion of an endoscope.

For example, as disclosed in Japanese Patent Application Laid-Open No. 63-260526, a tip of a side-viewing endoscope in which a plurality of light-emitting diodes are arranged on a circumference around an objective optical system in order to improve light-emitting characteristics. It is shown.

[0004]

However, in the prior art (Japanese Patent Laid-Open No. 63-260526), since the light emitting diodes are arranged on the spherical surface of the endoscope outer periphery,
A plurality of light emitting diodes are attached to the tip member one by one.

[0005] It is difficult to attach the light emitting diodes to the endoscope distal end member one by one. As a result, in the case of a side-view endoscope in which a plurality of light-emitting diodes are arranged on the outer periphery of the objective optical system, there is a problem that the tip becomes large.

The present invention has been made in view of the above circumstances, and even in a side-viewing endoscope in which a plurality of light emitting diodes are arranged on the outer periphery of an objective optical system, without increasing the outer diameter of the distal end. It is an object of the present invention to provide a distal end portion of a side view endoscope that can be configured.

[0007]

According to the present invention, there is provided an endoscope having a plurality of light-emitting diodes, wherein the plurality of light-emitting diodes are arranged on the outer periphery of an objective optical system as illumination means. Are mounted and integrated on a substrate, and the integrated set of the plurality of light emitting diodes is arranged on a plane including the center axis of the endoscope.

In the distal end portion of the endoscope according to the present invention, the plurality of light emitting diodes are mounted on a substrate and integrated, and a set of the integrated plurality of light emitting diodes includes an endoscope central axis. By arranging them on a plane, even a side-view endoscope in which a plurality of light-emitting diodes are arranged on the outer periphery of the objective optical system can be configured without increasing the outer diameter of the distal end.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 10 relate to an embodiment of the present invention, and FIG. 1 is a configuration diagram showing a configuration of a side-view type endoscope.
2 is a cross-sectional view showing the configuration of the distal end portion of the endoscope of FIG. 1, FIG. 3 is a cross-sectional view showing a cross section taken along line AA of FIG. 2, FIG. 4 is a view of FIG. 4 is a cross-sectional view showing a cross section taken along line BB, FIG. 6 is a cross-sectional view showing a cross section taken along line CC in FIG. 2, and FIG. 7 is a first view for explaining a first modification of the distal end portion of the endoscope in FIG. FIG. 8 is a second view illustrating a first modification of the endoscope distal end portion of FIG.
, FIG. 9 is a first explanatory diagram illustrating a second modification of the endoscope distal end portion of FIG. 1, and FIG. 10 is a diagram illustrating a second modification of the endoscope distal end portion of FIG. It is a 2nd explanatory view.

As shown in FIG. 1, a side-view type endoscope 1 includes an insertion portion 2 to be inserted into a body cavity, and a distal end portion of the endoscope of the present embodiment provided at a distal end of the insertion portion 2. (Hereinafter referred to as a distal end portion) 3 has a light emitting diode as an imaging means and an illuminating means, and a control section 4 at a proximal end of the insertion section 2.
Is provided with a light amount adjustment knob 5 for adjusting the amount of light emitted from the light emitting diode at the tip 3.

Then, the observation image illuminated by the light emitting diode is picked up by the image pick-up unit at the distal end portion 3 and converted into an electric signal.
Is sent to the camera control unit 7 and image processing is performed in the camera control unit 7 supplied with power by the AC adapter 8. The image signal processed in the camera control unit 7 is transmitted to the monitor 10 through the monitor cable 9, and an endoscope image is displayed.

As shown in FIGS. 2 and 3, an image pickup unit 13 for converting an optical signal comprising a solid-state image pickup device 11 and an electronic component 12 into an electric signal is provided in a tip portion 3 of the holder 14.
And is fixed to the C phone tie 15 with a screw C16.

In front of the solid-state imaging device 11, an objective lens unit set 17 for forming an observation image in a side view direction (a direction perpendicular to the longitudinal direction of the insertion section 2) on the solid-state imaging device 11 is provided. Is provided.

A signal cable 18 for transmitting and receiving signals from the camera control unit 7 to the image pickup unit 13 and a power cable for supplying electric power to a light emitting diode 19 as illumination means, which will be described later, are provided in the insertion section 2. 2
0 passes.

As shown in FIGS. 4 to 6, a light emitting diode 19 as an illuminating means for irradiating illumination light in a side viewing direction (a direction perpendicular to the longitudinal direction of the insertion portion 2) is provided on the substrate 2.
1 and the power cable 20 is also solidified with the screw A23 to the B phone tie 22 in an integrated state soldered to the substrate 21.

The plurality of integrated light emitting diodes 1
The substrate 21 provided with 9 is on a plane including the endoscope central axis 25.

Similarly, a part of the objective first surface lens 30 is on a plane including the center axis 25 of the endoscope. With the same outer diameter, the plane including the endoscope center axis 25 can have the largest area. Therefore, if the light emitting diode 19 sets are installed on this plane, the outer diameter of the endoscope distal end section 3 can be reduced. It can be kept as small as possible.

The light emitting diode 19 has a
After being fixed to the phone tie 22, the filler 2 is almost transparent.
At 4, the space is completely covered so as to cover the periphery of the light emitting diode 19 and the light emitting surface. By covering the upper surface of the light emitting diode 19 with the filler 24, not only the light emitting diode 19 is protected from the outside but also watertightness is maintained.

The light emitting diode 19 on the substrate 21
As shown in FIGS. 7 and 8, two may be mounted in pairs, and in this case, they are mounted on the substrate 21 and then attached to the distal end mechanical member 32 in a assembled state. Therefore, the two light emitting diodes 19 can be mounted as close to each other as possible. Thereby, the substrate width 33
Can be reduced, and the outer diameter of the distal end can also be reduced.

Further, as shown in FIGS. 9 and 10, the package of the light emitting diode 19 may be formed into a sector shape so as to improve the mounting density and the light emission.

As described above, in the present embodiment, the substrate 21 provided with the plurality of integrated light emitting diodes 19 is disposed on a plane including the center axis 25 of the endoscope, and the objective first surface lens 3
0 is also arranged on the plane including the endoscope central axis 25, so that the plane including the endoscope central axis 25 can have the largest area at the same outer diameter. The outer diameter of the portion 3 can be kept small.

In other words, the mounting density can be increased by arranging a light emitting diode assembly in which a plurality of light emitting diodes are mounted on a substrate on a plane including the center axis of the endoscope.
The outer diameter of the distal end of the endoscope can be kept very small.

Further, since a plurality of light emitting diodes can be assembled at once, the assembling workability is easy.

[0025]

As described above, according to the distal end portion of the endoscope of the present invention, a plurality of light emitting diodes are mounted on a substrate and integrated, and a set of the integrated light emitting diodes is internally mounted. Since it is arranged on the plane including the central axis of the endoscope, even if it is a side-view endoscope in which a plurality of light emitting diodes are arranged on the outer periphery of the objective optical system, it should be configured without increasing the outer diameter of the distal end. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a side-view type endoscope according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view showing a configuration of a distal end portion of the endoscope in FIG. 1;

FIG. 3 is a sectional view showing a section taken along line AA of FIG. 2;

FIG. 4 is a view of FIG. 2 viewed from above.

FIG. 5 is a sectional view showing a section taken along line BB of FIG. 4;

FIG. 6 is a sectional view showing a section taken along line CC of FIG. 2;

FIG. 7 is a first explanatory view illustrating a first modification of the distal end portion of the endoscope in FIG. 1;

FIG. 8 is a second explanatory diagram illustrating a first modification of the distal end portion of the endoscope in FIG. 1;

FIG. 9 is a first explanatory view illustrating a second modification of the endoscope distal end portion in FIG. 1;

FIG. 10 is a second explanatory diagram illustrating a second modification of the endoscope distal end portion in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Side-view type endoscope 2 ... Insertion part 3 ... Endoscope tip part 4 ... Control part 5 ... Light amount adjustment knob 6 ... Camera control cable 7 ... Camera control unit 8 ... AC adapter 9 ... Monitor cable 10 ... Monitor DESCRIPTION OF SYMBOLS 11 ... Solid-state image sensor 12 ... Electronic components 13 ... Imaging unit 14 ... Holder 15 ... C phone tie 16 ... Screw C 17 ... Objective lens unit set 18 ... Signal cable 19 ... Light emitting diode 20 ... Power supply cable 21 ... Board 22 ... B phone tie 23 ... Screw A 24 ... Filler 25 ... Endoscope center axis 30 ... Objective first surface lens

Claims (1)

[Claims] At the distal end of a side-viewing endoscope in which a plurality of light-emitting diodes are arranged on the outer periphery of an objective optical system as illumination means, the plurality of light-emitting diodes are mounted on a substrate and integrated, and A side-viewing endoscope distal end portion, wherein a group of the plurality of light emitting diodes is arranged on a plane including a center axis of the endoscope.