JP2000089130A - Tip part of endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a tip part of an endoscope to be of a watertight structure without arranging a transparent material on the front face of a light-emitting diode, and also without enlarging an outer diameter of the tip part. SOLUTION: A light-emitting diode 19 as a lighting means for emitting illuminating light in the side-looking direction (the direction perpendicular to the lengthwise direction of an insertion part 2) is soldered on a substrate 21, and a power source cable 20 is also soldered on the substrate 21 and they are fastened to B main body 22 by screw A23 in a one body state. The light-emitting diode 19 is fixed on the B main body 22 together with the substrate 22, and then the periphery of the light-emitting diode 19 including the light-emitting face is completely filled with an almost transparent filler 24. Thus, the light- emitting diode 19 is not only protected from the outside but also kept to be watertight by being covered with this filler 24 up to the upper face thereof 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end portion of an endoscope, and more particularly, to a distal end portion of an endoscope characterized by a portion where a light emitting diode as illumination means is disposed.

[0002]

2. Description of the Related Art As shown in Japanese Patent Application Laid-Open No. 8-117184 or Japanese Utility Model Application No. 300137, a structure in which a light emitting light source is provided as a lighting means at the distal end of an endoscope (Japanese Patent Application Laid-Open No. H08-117184).
No. 117184) and a structure in which a light emitting diode is provided as a lighting means around the camera unit at the tip of the in-pipe inspection camera device (Japanese Utility Model No. 30013737).
In each of the above structures, the light emitting unit is protected by a cover glass, an acrylic plate, or the like on the front surface of the light emitting unit.

In particular, in Japanese Utility Model No. 300137, the cover glass on the front surface of the light emitting diode is also watertight.

[0004]

However, when a transparent member such as a cover glass is used to form a water-tight structure as in the prior art, a wall for positioning and supporting the edge of the cover glass with respect to the metal member. It needs to be thick. Therefore, in the configuration in which the cover glass is provided, it is necessary to increase the size of the mechanical member by an amount corresponding to the edge for positioning.

[0005] As in the case of Japanese Utility Model No. 300137, in a configuration in which a light-emitting diode is provided as an illuminating means on the outer periphery of the image pickup unit, and a transparent member is disposed on the front surface, the outer diameter of the tip is increased by the positioning edge. There is a problem that it becomes.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has an endoscope in which a transparent member is not provided on the front surface of a light emitting diode, a watertight structure is provided, and an outer diameter at a tip end is not increased. It is intended to provide a mirror tip.

[0007]

According to the present invention, there is provided an endoscope having an image pickup means for picking up an observation image through an objective optical system;
A light emitting diode as illumination means for supplying illumination light to the outer periphery of the objective optical system is arranged, and at the endoscope end provided at the end of the insertion portion, the periphery of the light emitting diode is filled with a filler. It is composed.

In the distal end portion of the endoscope of the present invention, by filling the periphery of the light emitting diode with a filler, a watertight structure is obtained without providing a transparent member on the front surface of the light emitting diode, and the outer diameter of the distal end portion is increased. It is possible to configure without doing.

[0009]

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

First Embodiment FIGS. 1 to 11 relate to a first embodiment of the present invention, FIG. 1 is a configuration diagram showing a configuration of a side-view type endoscope, and FIG. 3 is a cross-sectional view showing a cross section taken along the line AA of FIG. 2, FIG. 4 is a view of FIG. 2 viewed from above, and FIG. 5 is a BB of FIG.
FIG. 6 is a cross-sectional view showing a cross section taken along line CC of FIG. 2, FIG. 7 is a cross-sectional view showing a cross section taken along line DD of FIG. 2, and FIG.
9 is a cross-sectional view showing a cross section taken along line EE of FIG. 2, FIG. 9 is a cross-sectional view showing a configuration of the control unit of FIG. 1, FIG. 10 is a configuration diagram showing a configuration of a modification of the control unit of FIG. FIG. 5 is a configuration diagram illustrating a configuration of the light emitting diode of FIG. 4.

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 and 5, 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 soldered to a substrate 21, In addition, the power cable 20 is also integrated with the B phone tie 22 with the screw A
Solidified at 23.

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.

As shown in FIG. 6 and FIG.
5 and B phone tie 22 are fixed with screws B25.
In the objective lens unit 17, a part of the lens frame 27 around the objective lens 26 at the rear of the prism is not large enough to have a wall thickness with the C phone tie 15 as a mating member. The lens frame 27 has a notched shape.

Returning to FIG. 2, a cover A28 screwed to the C phone tie 15 is fixed to the outer periphery of the image pickup unit 13, and a cover B29 is further screwed to the cover A28. The outer periphery of the imaging unit 13 has a cover A2
8, the cover B29 is a two-body type.
This is because the adhesive 30 is filled between the cover A28, the C phone tie 15, and the image pickup unit 13 for the purpose of increasing the fixing strength after the image pickup unit 13 is screw-fixed to the phone tie 15. By using a two-piece cover, the work can be performed while reliably observing the desired position, and the adhesive 30 can be easily filled.

As shown in FIG. 8, at the rear end of the front end portion 2, the signal cable 18 and the power cable 20 are sandwiched between the cover B29 and the stay 31 to increase the tensile strength in the axial direction of the cable. I have. The coater 31 is fixed to the cover B29 via a screw D32.

FIG. 9 shows the system control section 3 of FIG. 1. In the system control section 4, a light amount adjusting knob 5 is attached to a rear end panel 33 of the control section 4. Therefore, the light amount adjustment knob 5
Since the structure is such that a business trip is not performed from the outer peripheral surface 34 of the control unit 4, even if the operator places the endoscope on site, the switches including the light amount adjustment knob 5 are hardly damaged.

Further, as shown in FIG. 10, the light quantity control knob 5 may be provided in the circumferential direction of the control unit 4, and in this case, the light quantity control knob 5 travels with respect to the outer peripheral surface 34. It is attached so that there is no thing.

FIG. 11 shows an outline of the light emitting diode 19 used in the first embodiment. A chip (light emitting portion) 61 is provided in a central concave portion of the ceramic package 60,
This is a light emitting diode in which the portion is covered with a silicon resin 62.

As described above, in this embodiment, after the light emitting diode 19 is fixed to the B phone tie 22 together with the substrate 21, the light emitting diode 1 is filled with the almost transparent filler 24.
9 is covered so as to completely cover the periphery and the light-emitting surface of the light-emitting diode 19. Therefore, by covering up to the upper surface of the light-emitting diode 19 with the filler 24, a transparent member is not provided on the front surface of the light-emitting diode 19. Without increasing the diameter,
Further, the light-emitting diode 19 can be kept watertight as well as protected from the outside.

Therefore, by covering the filler up to the periphery of the light emitting diode and the front surface of the light emitting portion to form a watertight structure, it is not necessary to provide a wall thickness for supporting a transparent member for watertightness unlike the prior art. Since it is not necessary to increase the outer diameter of the tip, the outer diameter of the tip can be reduced. Also, the use of a filler can reduce the number of members and the cost, rather than using a transparent member such as a cover glass.

Second Embodiment FIGS. 12 to 14 relate to a second embodiment of the present invention. FIG. 12 is a cross-sectional view showing a configuration of a distal end portion of an endoscope, and FIG. FIG. 14 is a cross-sectional view showing a cross section taken along line GG of FIG. 12.

Since the second embodiment is almost the same as the first embodiment, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIGS. 12 to 14, an endoscope distal end portion 3a of the present embodiment is a distal end portion of a direct-view type endoscope, and an insertion portion including the endoscope distal end portion 1a is optical. The optical adapter 40 is attached to the outer periphery of the endoscope main body 41, and comprises an adapter 40 and an endoscope main body 41;
It is screwed and fixed via a mounting screw 43 with a toe screw 42 which is rotatable only in the circumferential direction.

In the optical adapter 40, a plurality of light emitting diodes 19 are arranged on the circumference around the objective lens 44 (see FIG. 13).
5 is mounted together with the contact pins 46, and is incorporated in the adapter phone tie 47 in an integrated state. After that, the almost transparent filler 48 is completely covered up to the upper surface of the light emitting portion of the light emitting diode 19 so as to maintain watertightness.

Light emitting diode 19 in optical adapter 40
The power supply from the endoscope body 41 to the
From 0, the light is sent to the contact pins 46 of the optical adapter 40 via the contact stick 49, and is supplied to the light emitting diode 19 via the substrate 45. The power supply member including the contact uke 49 and the contact pin 46 described above is an adapter phone tie 47,
Insulation A51, insulation B5 between the metal member of the C body 50
2. Insulated by an insulating tube 53 and fixed by screws 54 (see FIG. 14).

As described above, also in this embodiment, since the filler 48 is completely covered up to the upper surface of the light emitting portion of the light emitting diode 19 and is kept watertight, the same effect as that of the first embodiment can be obtained. it can.

[Supplementary note] (Supplementary note 1) An insertion unit in which imaging means for taking an observation image via an objective optical system and a light emitting diode as illumination means for supplying illumination light to the outer periphery of the objective optical system are arranged. An endoscope distal end portion provided at a distal end of the portion, wherein a periphery of the light emitting diode is filled with a filler.

(Additional Item 2) The light emitting diode irradiates the illumination light in a direction perpendicular to the longitudinal axis of the insertion portion, and the objective optical system uses the illumination light radiated by the light emitting diode to adjust the longitudinal axis of the insertion portion. 2. The endoscope tip according to claim 1, wherein the observation image is incident from a vertical direction.

(Additional Item 3) The light emitting diode irradiates the illumination light in the longitudinal axis direction of the insertion portion, and the objective optical system performs the observation from the longitudinal axis direction of the insertion portion by the illumination light emitted by the light emitting diode. 2. The endoscope tip according to claim 1, wherein an image is incident.

[0035]

As described above, according to the endoscope end portion of the present invention, since the periphery of the light emitting diode is filled with the filler, a watertight structure can be obtained without providing a transparent member on the front surface of the light emitting diode. There is an effect that the configuration can be made without increasing the outer diameter of the distal end portion.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a side-view type endoscope according to a first 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 sectional view showing a section taken along line DD of FIG. 2;

FIG. 8 is a sectional view showing a section taken along line EE of FIG. 2;

FIG. 9 is a sectional view showing a configuration of a control unit in FIG. 1;

FIG. 10 is a configuration diagram showing a configuration of a modification of the control unit in FIG. 9;

FIG. 11 is a configuration diagram showing a configuration of the light emitting diode of FIG. 4;

FIG. 12 is a sectional view showing a configuration of an endoscope distal end portion according to a second embodiment of the present invention;

FIG. 13 is a sectional view showing a section taken along line FF of FIG. 12;

14 is a sectional view showing a section taken along line GG of FIG. 12;

[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 ... Screws A 24 ... Filler

Claims (1)

[Claims] 1. An image pickup device for picking up an observation image via an objective optical system, and a light emitting diode as illumination means for supplying illumination light to an outer periphery of the objective optical system are provided at a tip of an insertion portion. An endoscope distal end, wherein the periphery of the light emitting diode is filled with a filler.