JPH08160318A - Light source device for endoscope - Google Patents

Abstract

PURPOSE: To prevent a switch from being forgetfully turned off in the case a light source device is detached from an operating part and to surely turn it off by turn it off a power source circuit for a light source lamp in the case the light source device is detached from the operating part. CONSTITUTION: An automatic turning-off switch 20 is constituted of a pin 21 moving in the axial direction in the case the light source device 10 is attached to the operating part 1, a contact point 22 opening/closing by the movement, and a compression spring 23 pressing the pin 21, etc., the contact point 22 is connected somewhere on the power source circuit 16, is opened in a natural condition, and becomes the closed condition by the movement of the pin 21 in the case the device 10 is attached to the part 1. When the device 10 is detached from the part 1, the contact point 22 is opened, the power source circuit 16 is turned off, and the light source lamp 12 is turned off regardless of the switching condition of a manual switch 17. Since the switch 20 is always turned on in the case the device 10 is attached to the part 1; the circuit 16 is turned on/off by the switching of the switch 17, so that the lamp 12 is turned on/off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope which is detachably attached to an operation section of an endoscope in order to supply illumination light to a light guide for illumination having an incident end disposed therein. The present invention relates to a light source device for a mirror.

[0002]

2. Description of the Related Art In a portable endoscope or the like, a light source for illuminating a light guide for illumination is arranged at an operating portion and a light source device for supplying illumination light to the operating end is provided to the operating portion. It is detachable.

In such a light source device, generally, a miniature bulb is used as a light source lamp, and a miniature bulb or the like is used as a power source to light the miniature bulb. The light bulb is turned on and off by a manual switch provided on the outer surface of the light source device.

[0004]

However, if the light source lamp is turned on and off by a manual switch, when the light source device is detached from the operation portion of the endoscope, the switch is forgotten to be turned off and the light source lamp is kept on. It may be left alone.

In the case of a full-scale light source device using a halogen lamp, a xenon lamp or the like as the light source lamp, the light source lamp is very bright, and the possibility of forgetting to turn off the switch is small.

However, in a simple light source device using a miniature light bulb as a light source lamp, since the light emission amount of the light source lamp is small, it is difficult to notice it without turning it on, and if it is left on, the battery will be consumed. is there.

Therefore, according to the present invention, when the light source device is detached from the operating portion of the endoscope, the switch is not forgotten,
An object is to provide a light source device for an endoscope in which a light source lamp is reliably turned off.

[0008]

In order to achieve the above object, a light source device for an endoscope according to the present invention supplies illumination light to an illumination light guide whose incident end is arranged at an operating portion of the endoscope. In a light source device for an endoscope, which has a built-in light source lamp for performing detachable operation with respect to the operation section, for turning on the light source lamp when the light source apparatus is detached from the operation section. A feature is that an automatic light-off switch that always turns off the power supply circuit is provided.

[0009]

Embodiments will be described with reference to the drawings. Figure 1
The state where the light source device 10 is attached to the operation unit 1 of the endoscope is shown. Reference numeral 2 is an incident end face of a light guide fiber bundle for illuminating an endoscope, and 3 is a cover glass.

The light source device 10 is formed in a cylindrical shape as a whole, but a mounting ring 11 screwed to the operating portion 1 is rotatably provided on the outer peripheral portion on the tip end side thereof, but the movement in the axial direction is restricted. It is installed in the installed state.

Therefore, as shown in FIG. 1, when the mounting ring 11 is screwed onto the operating portion 1, the light source device 10 is fixed to the operating portion 1 and the mounting ring 11 is loosened. When the screwed state with is released, the light source device 10 is removed from the operation unit 1.

A light bulb is arranged as a light source lamp 12 inside the tip of the light source device 10.
Is attached to the operation unit 1, the light source lamp 12 faces the incident end surface 2 of the light guide fiber bundle, and illumination light is supplied.

Around the light source lamp 12, there is arranged a reflecting mirror 12a for converging the emitted light to the incident end face 2 of the light guide fiber bundle. 12b is a socket for the light source lamp 12. Reference numeral 13 is a cover glass attached to the front surface of the light source lamp 12.

In the rear half of the light source device 10, a dry battery 14 as a power source for lighting the light source lamp 12 is housed. If the bottom lid 15 screwed to the rear end of the light source device 10 is loosened and removed, the dry battery 14 can be taken in and out from the rear end and replaced.

The bottom lid 15 includes a light source lamp 12 and a dry battery 1.
A button-like manual switch 17 for turning on and off the power supply circuit 16 connecting the four in series is provided in a protruding manner. Then, by operating the manual switch 17 with the light source device 10 attached to the operation unit 1, the light source lamp 1
It is possible to arbitrarily switch on / off of No. 2. 18
Is a rubber cover covered by the manual switch 17.

Further, inside the mounting ring 11 on the tip side, an automatic light-off switch 2 for always turning off the power supply circuit 16 when the light source device 10 is detached from the operating portion 1.
0 is arranged side by side with the light source lamp 12.

The automatic light-off switch 20 includes a pin 21 which is pushed by the operation unit 1 and moves in the axial direction when the light source device 10 is attached to the operation unit 1, and a contact 22 which is opened and closed by the movement of the pin 21 in the axial direction. And a compression coil spring 23 for urging the pin 21 forward.

The contact 22 is connected in series in the middle of the power supply circuit 16 and is opened in a natural state. When the light source device 10 is attached to the operation portion 1 and the pin 21 moves inward, the contact 22 is pushed by it. It will be in the closed state as shown in FIG.

When the light source device 10 is removed from the operating portion 1, the pin 21 is moved forward by the urging force of the compression coil spring 23 to open the contact 22 and the power supply circuit 16 is opened, as shown in FIG. Turn off.

Therefore, when the light source device 10 is detached from the operating portion 1, the power supply circuit 16 is always turned off regardless of the switching state of the manual switch 17, and the light source lamp 12 is not turned on.

When the light source device 10 is attached to the operation section 1, the automatic light-off switch 20 is always turned on. Therefore, the power source circuit 16 is turned on and off depending on the switching state of the manual switch 17, and the light source lamp 12 is turned on or off. .

[0022]

According to the present invention, when the light source device is detached from the operating portion of the endoscope, the power supply circuit for turning on the light source lamp is always turned off by the automatic light-off switch. The light source lamp is surely turned off. Therefore, electric power is not wasted, and even if a dry battery or the like is used as a power source, it is possible to prevent its consumption.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a state in which a light source device according to an embodiment is attached to an operation unit.

FIG. 2 is a side cross-sectional view showing a state in which the light source device of the embodiment is detached from the operation section.

[Explanation of symbols]

 1 Operation part 10 Light source device 12 Light source lamp 16 Power circuit 20 Automatic light-off switch 21 Pin 22 Contact

Claims (1)

[Claims] 1. An internal light source lamp for supplying illumination light to an illuminating light guide having an incident end disposed in an operating portion of an endoscope, which is detachably attached to the operating portion. In the light source device for an endoscope, an automatic light-off switch is provided to always turn off a power supply circuit for lighting the light source lamp when the light source device is detached from the operation section, and the light source for the endoscope is provided. apparatus.