JP4722604B2 - Endoscope device - Google Patents

Description

  The present invention relates to an endoscope apparatus used for medical and industrial purposes.

  2. Description of the Related Art Recently, an endoscope capable of observing an organ in a body cavity by inserting an elongated insertion portion into a body cavity, or performing various therapeutic treatments using a treatment tool inserted into a treatment tool channel as necessary. Widely used.

Further, these endoscopes are used not only for medical purposes but also for industrial purposes, for observation and inspection of test parts in boilers , engines , chemical plants, etc., or in machines.
Furthermore, in the medical field, a fluorescent substance that emits fluorescence when irradiated with excitation light is used to absorb the fluorescent substance in a tissue piece, or in the industrial field, when a fluorescent substance is applied to inspect cracks, etc. Inspection was performed by emitting excitation light.

As such an endoscope, there is known an endoscope provided with notification means for emitting visible light when ultraviolet light is transmitted, such as an endoscope described in Patent Document 1 described later. As this notification means, a fluorescent material that emits visible light when ultraviolet light is transmitted is used.
In this endoscope, when the ultraviolet light is emitted, the notification means emits light. Therefore, the user can know that the ultraviolet light is emitted based on whether or not the notification means emits light.
JP-A-6-347707

  However, in the endoscope having the notification means in this way, when the notification means drops off or is about to drop for some reason, the notification means does not emit light even if ultraviolet light is emitted, and ultraviolet light is emitted. There is a possibility that the user may not be aware of what is being done.

The present invention has been made in view of the above circumstances, and is an endoscope in which a user can easily confirm that laser light for exciting a fluorescent material is emitted and the laser light is not emitted carelessly. It is intended to provide.

In order to achieve the above object, the present invention provides the following means.
The present invention includes a light source for emitting a laser beam having a controller for controlling the operation of the light source, and an insertion portion to be inserted into the inspection object space, the insertion portion, the laser beam the light source emits A light guide that guides the light to the tip of the insertion portion, a phosphor that is arranged in proximity to the light guide and that emits visible light when excited by the laser light emitted from the light guide, and has one end different from the phosphor A plurality of conductive cables connected to a part and connected to the control device at the other end, and the phosphor is provided with a conductive portion for connecting one end of the conductive cable, Provided is an endoscope apparatus in which a control device stops the operation of the light source when conduction between at least one of the conductive cables and the other conductive cable is interrupted.

In the endoscope apparatus configured as described above, one end of a plurality of conductive cables is connected to different portions of the phosphor provided in the insertion portion, and one end of each of these conductive cables is connected to the fluorescent light. It is electrically connected via a conductive part provided on the body.
For this reason, when the phosphor is dropped from the insertion portion or is about to fall off, one or more ends of these conductive cables are pulled away from the conductive portion, and these conductive The conduction between at least one of the cables and the other conductive cable is interrupted.

When the conduction between any of the conductive cables is interrupted in this way, the control device stops the operation of the light source, so that the laser light is not supplied to the light guide.
That is, in this endoscope apparatus, the laser light is not supplied to the light guide in a state where the phosphor does not emit visible light, and the user can easily determine whether or not the laser light is supplied. Can do.

  In this endoscope apparatus, the larger the number of conductive cables installed, the more connection portions between the conductive cables and the phosphors, and the degree of freedom in the orientation of the phosphors is limited. That is, even when a slight change occurs in the orientation of the phosphor, one end of one of the conductive cables is pulled away from the conductive portion, and conduction between this conductive cable and the other conductive cable is interrupted. Therefore, even when the phosphor is about to fall off without completely falling off, it is possible to reliably detect this and stop the light source.

  Here, an alarm device may be provided in the endoscope device, and the control device may be configured to operate the alarm device and the alarm device when the conduction between the conductive cables is interrupted. In this case, when the phosphor has dropped or is about to drop, the alarm device is activated, so that the user can easily detect the dropping of the phosphor.

Further, the present invention includes a light source that emits laser light, a control device, an alarm device, and an insertion portion that is inserted into a space to be inspected, and the light beam emitted by the light source is transmitted to the insertion portion. A light guide that leads to the tip of the insertion portion, a phosphor that is arranged close to the light guide and that is excited by laser light emitted from the light guide and emits visible light, and one end connected to a different part of the phosphor A plurality of conductive cables whose other ends are connected to the control device, and the phosphor is provided with a conductive portion that connects the one ends of the conductive cables. An endoscope apparatus that operates the alarm device when conduction between at least one of the conductive cables and the other conductive cable is interrupted is provided.

In the endoscope apparatus configured as described above, one end of a plurality of conductive cables is connected to different portions of the phosphor provided in the insertion portion, and one end of each of these conductive cables is connected to the fluorescent light. It is electrically connected via a conductive part provided on the body.
For this reason, when the phosphor is dropped from the insertion portion or is about to fall off, one or more ends of these conductive cables are pulled away from the conductive portion, and these conductive The conduction between at least one of the cables and the other conductive cable is interrupted.

When the conduction between the conductive cables is interrupted in this way, the control device activates the alarm device.
That is, in this endoscope apparatus, the alarm device is activated when laser light is supplied to the light guide in a state where the phosphor does not emit visible light, so that the user can easily determine whether or not laser light is supplied. Can be determined.

  In this endoscope apparatus, the larger the number of conductive cables installed, the more connection portions between the conductive cables and the phosphors, and the degree of freedom in the orientation of the phosphors is limited. That is, even if a slight change occurs in the orientation of the phosphor, one end of one of the conductive cables is pulled away from the conductive part, and conduction between this conductive cable and the other conductive cable is interrupted. Therefore, even when the phosphor is about to fall off without completely falling off, the alarm device can be activated by reliably detecting this.

Here, the control device may be configured to operate the alarm device and stop the operation of the light source when the conduction between the conductive cables is interrupted.
In this case, the laser light is not supplied to the light guide in a state where the phosphor does not emit visible light, and the user can easily determine whether the laser light is supplied.
The endoscope apparatus is further provided with a shut-off device for shutting off the laser light emitted from the light source, and the control device operates the alarm device when the conduction between the conductive cables is cut off, and the shut-off device. It is good also as a structure which operates.
Also in this case, the laser light is not supplied to the light guide in a state where the phosphor does not emit visible light, and the user can easily determine whether or not the laser light is supplied.

Further, the present invention includes a light source that emits laser light, a control device, a blocking device that blocks the laser light emitted from the light source, and an insertion portion that is inserted into a space to be inspected. A light guide that guides the light beam emitted from the light source to the distal end of the insertion portion, a phosphor that is arranged in proximity to the light guide and that emits visible light when excited by a laser beam emitted from the light guide, A plurality of conductive cables having one end connected to a different part of the phosphor and the other end connected to the control device are provided, and the phosphor has a conductive portion that connects one end of the conductive cable to each other. The control device operates the shut-off device when conduction between at least one of the conductive cables and the other conductive cable is cut off. To provide an endoscope apparatus for blocking the laser beam.

In the endoscope apparatus configured as described above, one end of a plurality of conductive cables is connected to different portions of the phosphor provided in the insertion portion, and one end of each of these conductive cables is connected to the fluorescent light. It is electrically connected via a conductive part provided on the body.
For this reason, when the phosphor is dropped from the insertion portion or is about to fall off, one or more ends of these conductive cables are pulled away from the conductive portion, and these conductive Continuity between at least one of the cables and the other conductive cable is interrupted.

When the conduction between the conductive cables is interrupted in this way, the control device activates the interrupting device to interrupt the laser light emitted from the light source.
That is, in this endoscope apparatus, the laser light is not supplied to the light guide in a state where the phosphor does not emit visible light, and the user can easily determine whether or not the laser light is supplied. Can do.

  In this endoscope apparatus, the larger the number of conductive cables installed, the more connection portions between the conductive cables and the phosphors, and the degree of freedom in the orientation of the phosphors is limited. That is, even if a slight change occurs in the orientation of the phosphor, one end of one of the conductive cables is pulled away from the conductive part, and conduction between this conductive cable and the other conductive cable is interrupted. Therefore, even when the phosphor is about to fall off without completely falling off, the blocking device can be operated by reliably detecting this.

  Here, an alarm device may be provided in the endoscope device, and the control device may be configured to operate the alarm device and the alarm device when the conduction between the conductive cables is interrupted. In this case, when the phosphor has dropped or is about to drop, the alarm device is activated, so that the user can easily detect the dropping of the phosphor.

In each of the above endoscope apparatuses, the conductive cable may be connected to the conductive portion at a distal end surface.
In this case, since the contact area between the conductive cable and the conductive portion is small, even if a slight change occurs in the direction of the phosphor, one end of the conductive cable tends to come off from the conductive portion.
For this reason, in this endoscope apparatus, even when the phosphor is about to fall off without being completely dropped off, this can be detected reliably.

In each of the endoscope apparatuses described above, three or more conductive cables are provided, and the control device is configured to provide a potential difference between any one of the conductive cables and the other conductive cable. If no current is detected for at least one of the conductive cables, it may be determined that conduction between the conductive cables is interrupted.
In this configuration, even when three or more conductive cables are provided, it is possible to reliably detect that conduction between any of the conductive cables is interrupted.

Further, in each of the endoscope apparatuses described above, three or more conductive cables are provided, and the control apparatus is configured so that any one of the conductive cables has another conductive cable. The continuity check for each one of the cables is sequentially performed, and if no current is detected for at least one of the conductive cables, it is determined that the continuity between the conductive cables is interrupted. Good.
In this configuration, even when three or more conductive cables are provided, it is possible to reliably detect that conduction between any of the conductive cables is interrupted.

In each of the endoscope apparatuses, the phosphor may be provided so as to face the emission end of the light guide.
In this endoscope apparatus configured, the laser light coming from the light source to the exit end of the light guide is irradiated onto the phosphor, since the laser light is converted into visible light by the phosphor, instead of a laser beam Illumination with visible light can be performed.

Since the laser beam has a strong directivity and a small luminous flux, it can be efficiently incident on the light guide without using a condensing device or using a minimum condensing device. In addition, when the laser beam is incident on the light guide in this way, a condensing device is unnecessary or minimal, so that the laser beam is incident at a sufficiently shallow angle with respect to the optical axis of the light guide in the light guide. Therefore, there is little transmission loss in the process of being transmitted in the light guide.
Since the laser light has the same wavelength and high quantum efficiency, it is converted into visible light with high efficiency by the fluorescent substance.

For this reason, in this endoscope apparatus, a light source is small compared with the case where the light source lamp is used to obtain the same level of illuminance.
In addition, since the laser light source generates less heat than a light source lamp that can obtain the same level of illuminance, a cooling device for cooling the light source can be small.
Further, in this endoscope apparatus, a laser light source having high directivity is used as the light source, and the light condensing apparatus is unnecessary or minimal as described above.
From the above, this endoscope apparatus can be made smaller than an endoscope apparatus using a light source lamp.

According to the endoscope apparatus according to the present invention, since it readily ascertainable by the user of the laser light is emitted, and inadvertently laser light is not emitted, it is easy to handle.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the endoscope apparatus 1 includes an apparatus main body 2, an operation unit 3 that can be gripped by an operator independently of the apparatus main body 2, and an elongate and flexible insert inserted into a space to be inspected. And an insertion portion 4 having the property.
The insertion unit 4 is provided in the operation unit 3 and can be handled together with the operation unit 3 independently of the apparatus body 2.
A drive device for adjusting the orientation of the distal end is provided at the distal end of the insertion portion 4, and the user can turn the orientation of the distal end of the insertion portion 4 in an arbitrary direction by operating the operation portion 3. It can be done.

The endoscope apparatus 1 is provided with a light source 11 that emits ultraviolet light and a control device 12 that controls the operation of the light source 11. Moreover, the endoscope apparatus 1 is provided with a cooling device for cooling the light source 11 as necessary.
The light source 11 may be a light source lamp or a laser light source as long as it emits ultraviolet light. In the present embodiment, a laser diode that emits ultraviolet laser light is used as the light source 11.
The light source 11 and the control device 12 are provided in either one of the device main body 2 and the operation unit 3, respectively. In the present embodiment, the light source 11 and the control device 12 are provided in the operation unit 3.

In the insertion portion 4, a light guide 13 that guides the ultraviolet laser light emitted from the light source 11 to the distal end of the insertion portion 4 and emits it from the distal end, and a phosphor 14 that is disposed in close proximity to the emission end of the light guide 13. And are provided. Further, a condensing lens 15 is provided between the light source 11 and the light guide 13 so that the luminous flux of the ultraviolet laser light emitted from the light source 11 is reduced to the diameter of the light guide 13 and is incident on the incident end of the light guide 13. Yes.
Here, the number of sets of the light source 11, the light guide 13, and the phosphor 14 is arbitrary, and the amount of illumination light can be increased by increasing the number of sets of these sets of devices.

  For example, as shown in FIG. 2, the light guide 13 is constituted by an optical fiber cable in which the outer periphery of a plurality of optical fibers 13a is covered with a coating layer such as a silicon tube. In the present embodiment, the light guide 13 is constituted by an optical fiber cable in which seven optical fibers 13a are bundled.

  The phosphor 14 is excited by being irradiated with ultraviolet light and emits visible light (preferably white light). In the present embodiment, as shown in FIG. 2, the phosphor 14 has a disk shape whose diameter is equal to or larger than the diameter of the bundle of optical fibers 13 a of the light guide 13, and its axis is coaxial with the optical axis of the light guide 13. Is provided. Thereby, all of the ultraviolet light emitted from the bundle of optical fibers 13 a is incident on the phosphor 14, converted into visible light, and emitted from the tip of the insertion portion 14. That is, in the endoscope apparatus 14, the ultraviolet light does not leak to the outside, and illumination with visible light emitted from the phosphor 14 is performed.

On the outer peripheral surface of the phosphor 14, a conductive portion 14 a is provided over the entire circumference.
The conductive portion 14 a is configured by, for example, a metal foil attached to the surface of the phosphor 14 or a metal layer formed by plating on the surface of the phosphor 14.

The insertion section 4 is provided with a plurality of conductive cables 16 each having one end 16 a connected to a different part of the phosphor 14 and the other end connected to the control device 12.
The conductive cable 16 has a configuration in which a conductor wire 16b such as a metal wire is covered with an insulating coating layer 16c.
The conductive wire 16b is exposed at one end 16a of the conductive cable 16, and this portion is mechanically and electrically fixed to the conductive portion 14a provided on the phosphor 14 by, for example, a conductive adhesive. ing.
In the present embodiment, two conductive cables 16 are provided, and these conductive cables 16 are connected to the phosphor 14 on the opposite side across the axis of the phosphor 14.
The conduction between these conductive cables 16 is monitored by the control device 12.
The control device 12 is configured to stop the operation of the light source 11 and stop the generation of ultraviolet light when the conduction between the conductive cables 16 is interrupted.

As shown in FIG. 1, the endoscope apparatus 1 is provided with an imaging device 17 provided at the distal end of the insertion unit 4 and a monitor 18 that displays an image captured by the imaging device 17.
As the imaging device 17, for example, a CCD (Charge Coupled Device) that converts a captured image into an electrical signal is used. In this case, the endoscope apparatus 1 includes a lens 17a that is disposed opposite to the imaging surface of the imaging device 17 at the distal end of the insertion unit 4, and a signal line 17b that communicates from the imaging device 17 to the apparatus main body 2 through the insertion unit 4. And a signal processing device 17c that receives an electrical signal output from the imaging device 17 via the signal line 17b, converts the electrical signal into an image signal, and outputs the image signal to the monitor 18.
The monitor 18 is provided on either the apparatus main body 2 or the operation unit 3.
In the present embodiment, the monitor 18 is provided in the apparatus main body 2.

In the endoscope apparatus 1 configured as described above, one end 16 a of a pair of conductive cables 16 is connected to different parts of the phosphor 14 provided in the insertion portion 4, and these conductive cables 16. The one ends 16a are electrically connected to each other through a conductive portion 14a provided on the phosphor 14.
For this reason, when the phosphor 14 is dropped from the insertion portion 4 or is about to fall off, one or a plurality of one ends 16a of these conductive cables 16 are pulled away from the conductive portion 14a. Thus, the conduction between the conductive cables 16 is interrupted.

When the continuity between the conductive cables 16 is interrupted in this way, the control device 12 stops the operation of the light source 11, so that no ultraviolet light is supplied to the light guide 13.
That is, in this endoscope apparatus 1, the ultraviolet light is not supplied to the light guide 14 in a state where the phosphor 14 does not emit visible light, and the user can easily determine whether or not the ultraviolet light is supplied. Can be determined.

[Second Embodiment]
Next, a second embodiment of the endoscope apparatus according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part similar to embodiment mentioned above, and the detailed description is abbreviate | omitted.
In the endoscope apparatus 21 according to this embodiment, the alarm device 22 is provided in the endoscope apparatus 1 shown in the first embodiment, and the control device 12 is disconnected from the conductive cable 16. Thus, the alarm device 22 is activated.
As the alarm device 22, a warning sound generating device such as a buzzer, a warning lamp, or the like, or a device that displays an alarm image on the monitor 18 can be used. Further, the alarm device 22 is provided in either one or both of the device main body 2 and the operation unit 3.

In the endoscope apparatus 21, when the conduction between the conductive cables 16 is interrupted, the control device 12 activates the alarm device 22.
That is, in this endoscope apparatus 21, when the phosphor 14 is dropped or is about to drop, the alarm device 22 is activated, so that the user can easily detect the dropping of the phosphor. it can.

[Third embodiment]
Next, a third embodiment of the endoscope apparatus according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part similar to embodiment mentioned above, and the detailed description is abbreviate | omitted.
The endoscope apparatus 31 according to this embodiment is provided with a blocking device 32 that blocks ultraviolet light emitted from the light source 11 in the endoscope apparatus 1 shown in the first embodiment described above. Instead of stopping the light source 11 when the conduction between the cables 16 is interrupted, the interrupting device 32 is activated.
As the blocking device 32, for example, a shutter device provided between the light source 11 and the light guide 13 is used.

In the endoscope apparatus 31, when the conduction between the conductive cables 16 is interrupted, the control apparatus 12 operates the interrupter 32.
In other words, in the endoscope apparatus 31, when the phosphor 14 has dropped or is about to drop, the blocking device 32 is activated and ultraviolet light is not supplied to the light guide 13.
As a result, in this endoscope apparatus 31, ultraviolet light is not supplied to the light guide 14 when the phosphor 14 does not emit visible light, and the user can easily determine whether or not ultraviolet light is supplied. Can be determined.

[Fourth embodiment]
Subsequently, a fourth embodiment of the endoscope apparatus according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part similar to embodiment mentioned above, and the detailed description is abbreviate | omitted.
An endoscope apparatus 41 according to this embodiment is the same as the endoscope apparatus shown in each of the above-described embodiments, in which the diameter of the phosphor 14 is made larger than the diameter of the bundle of optical fibers 13a of the light guide 13, and the phosphor In place of providing the conductive portion 14a on the outer peripheral surface of 14, the conductive portion 14a is provided over the entire circumference in a region of the phosphor 14 facing the light guide 13 side and radially outside the bundle of optical fibers 13a. Is.
Each conductive cable 16 is connected to the conductive portion 14a in a state where the tip end surface of the one end 16a abuts against the conductive portion 14a.

In this endoscope apparatus 41, since the contact area between the conductive cable 16 and the conductive portion 14a is small, even if a slight change occurs in the direction of the phosphor 14, the one end 16a of the conductive cable 16 is connected to the conductive portion. It is easy to come off from 14a.
For this reason, in this endoscope apparatus 41, even if the phosphor 14 is about to fall off without being completely dropped off, this can be reliably detected.

[Fifth embodiment]
Next, a fifth embodiment of the endoscope apparatus according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part similar to embodiment mentioned above, and the detailed description is abbreviate | omitted.
The endoscope apparatus 51 according to this embodiment is provided with three or more conductive cables 16 in the endoscope apparatus shown in each of the above-described embodiments.
The endoscope apparatus 51 of the present embodiment is the same as the endoscope apparatus 1 shown in the first embodiment, except that the conductive cables 16 are connected to the phosphors 14 at intervals of about 90 ° around the axis. is there.

In the endoscope apparatus 51, the control device 12 generates a potential difference between any one of the conductive cables 16 and the other conductive cable 16, and at least one of the conductive cables 16. When the current is not detected, the continuity between the conductive cables 16 is determined to be interrupted.
Thereby, even if the continuity between any of the conductive cables 16 is interrupted, the control device 12 can reliably detect this.

  In this endoscope apparatus 51, since the conductive cable 16 is connected vertically and horizontally around the axis of the phosphor 14, the degree of freedom in the orientation of the phosphor 14 is limited. That is, even when a slight change occurs in the direction of the phosphor 14, one end 16 a of one of the conductive cables 16 is pulled away from the conductive portion 14 a, and the conductive cable 16 and the other conductive cable 16 are Is interrupted.

For example, when the orientation of the phosphor 14 is deviated around a straight line connecting the connection portions of the pair of conductive cables 16 arranged across the axis of the phosphor 14 (hereinafter referred to as the Y axis), The conductive cable 16 connected on the Y axis may not be detached from the conductive portion 14a. However, at least one of the other conductive cables 16 moves in such a direction that the phosphor 14 moves away from the one end 16a toward the distal end side, so that the one end 16a is easily detached from the conductive portion 14a.
For this reason, in this endoscope apparatus 51, even when the phosphor 14 is not completely removed but is about to fall off, this is surely detected and the operation of the light source 11 is stopped, or an alarm device is provided. 22 and the interruption | blocking apparatus 32 can be operated.

Here, in the endoscope apparatus 51, the method for confirming the continuity between the conductive cables 16 by the control device 12 is not limited to the above method, and other methods may be used.
For example, the control device 12 sequentially checks the continuity of each one of the conductive cables 16 with respect to each of the other conductive cables 16, and at least any one of the conductive cables 16. If no current is detected for the cable 16, it may be determined that conduction between the conductive cables 16 is interrupted.

In addition, this invention is not limited to the structure shown to said each embodiment, A various change can be added in the range which does not deviate from the meaning.
For example, the configuration shown in the fifth embodiment may be applied to an endoscope apparatus shown in another embodiment. FIG. 7 shows an endoscope apparatus 61 obtained by applying the configuration shown in the fifth embodiment to the endoscope apparatus 41 shown in the fourth embodiment.
Even in this endoscopic device 61, even when the phosphor 14 is about to fall off without being completely dropped, this is surely detected and the operation of the light source 11 is stopped, the alarm device 22 or the like. The shut-off device 32 can be activated.

Moreover, in the endoscope apparatus 1 shown in the first embodiment, an alarm device 22 of the endoscope apparatus 21 shown in the second embodiment may be provided.
In this case, when the phosphor 14 is dropped or is about to fall off, in addition to the light source 11 being stopped, an alarm is issued, so that the user can detect the dropping of the phosphor 14. .

1 is a block diagram illustrating a configuration of an endoscope apparatus according to a first embodiment of the present invention. It is a perspective view which shows the front-end | tip of the insertion part of the endoscope apparatus which concerns on 1st embodiment of this invention. It is a block diagram which shows the structure of the endoscope apparatus which concerns on 2nd embodiment of this invention. It is a block diagram which shows the structure of the endoscope apparatus which concerns on 3rd embodiment of this invention. It is a perspective view which shows the front-end | tip of the insertion part of the endoscope apparatus which concerns on 4th embodiment of this invention. It is a perspective view which shows the front-end | tip of the insertion part of the endoscope apparatus which concerns on 5th embodiment of this invention. It is a perspective view which shows the other example of the front-end | tip of the insertion part of the endoscope apparatus which concerns on 5th embodiment of this invention.

Explanation of symbols

1, 21, 31, 41, 51, 61 Endoscope device 4 Insertion unit 11 Light source 12 Control device 13 Light guide 14 Phosphor 14a Conductive unit 16 Conductive cable 16a One end 22 Alarm device 32 Shut-off device

Claims (7)

A light source that emits laser light;
A control device for controlling the operation of the light source;
Having an insertion part to be inserted into the inspection object space,
In the insertion portion, a light guide that guides the laser beam emitted from the light source to the tip of the insertion portion;
A phosphor that is disposed in proximity to the light guide and is excited by the laser light emitted from the light guide to emit visible light;
A plurality of conductive cables each having one end connected to a different part of the phosphor and the other end connected to the control device;
The phosphor is provided with a conductive portion that connects one end of the conductive cable,
An endoscope apparatus in which the control device stops the operation of the light source when conduction between at least one of the conductive cables and the other conductive cable is interrupted. A light source that emits laser light;
A control device;
An alarm device;
Having an insertion part to be inserted into the inspection object space,
In the insertion portion, a light guide that guides the light beam emitted from the light source to the tip of the insertion portion;
A phosphor that is disposed in proximity to the light guide and is excited by a laser beam emitted from the light guide to emit visible light;
A plurality of conductive cables each having one end connected to a different part of the phosphor and the other end connected to the control device;
The phosphor is provided with a conductive portion that connects one end of the conductive cable,
An endoscope apparatus in which the control device operates the alarm device when conduction between at least one of the conductive cables and the other conductive cable is interrupted. A light source that emits laser light;
A control device;
A blocking device for blocking the laser beam emitted by the light source;
Having an insertion part to be inserted into the inspection object space,
In the insertion portion, a light guide that guides the light beam emitted from the light source to the tip of the insertion portion;
A phosphor that is disposed in proximity to the light guide and is excited by laser light emitted from the light guide to emit visible light;
A plurality of conductive cables each having one end connected to a different part of the phosphor and the other end connected to the control device;
The phosphor is provided with a conductive portion that connects one end of the conductive cable,
An internal view in which the control device operates the blocking device when the conduction between at least one of the conductive cables and the other conductive cable is cut off to cut off the laser light. Mirror device.  The endoscope apparatus according to claim 1, wherein the conductive cable is connected to the conductive portion at a distal end surface. Three or more conductive cables are provided,
The controller causes a potential difference between any one of the conductive cables and the other conductive cable;
The endoscope apparatus according to any one of claims 1 to 4, wherein when no current is detected for at least one of the conductive cables, it is determined that conduction between the conductive cables is interrupted. Three or more conductive cables are provided,
The control device sequentially performs continuity confirmation on each of the other conductive cables for any one of the conductive cables, and at least one of the conductive cables. The endoscope apparatus according to claim 1, wherein when no current is detected, it is determined that conduction between the conductive cables is interrupted.  The endoscope apparatus according to any one of claims 1 to 6, wherein the phosphor is provided to face an emission end of the light guide.

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