JPH02140133A - Electronic endoscope device for dental root - Google Patents

Abstract

PURPOSE:To obtain the electronic endoscope device for dental root, which is light and compact, of high resolution by providing an image forming optical system and an image pickup means, which converts formed image into an electric signal, in the case of a second inserting part. CONSTITUTION:For an endoscope 2 for dental root, a case 8 is provided in one edge part of a first inserting part 7, which is slender and tube-shaped, and a second inserting part 11 is provided in the lower edge part of the case 8 so that a central line can be almost orthogonal with the central line of the first inserting part 7. A light guide bundle 13 is connected to a light source device 3 and signal lines 14 and 16 are connected to a controller 4 respectively. A lens image forming lens system 28 is provided in a case 26 and a CCD 311 is provided as an image forming means in a lens frame 29. Photo-electric conversion is executed for the formed image and the picture of a part to be checked is displayed on the screen of a monitor 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic endoscopic device for dental roots that observes the inside of a tooth root canal.

[Prior art and problems to be solved by the invention] In recent years, by inserting an elongated insertion section into a body cavity, it has become possible to diagnose internal organs in the body cavity, and to perform therapeutic treatment using treatment instruments as necessary. Endoscopes are widely used.

The above endoscopes have a flexible insertion section and can be used to observe deep inside the body cavity through a curved insertion path, and a flexible endoscope (fiberscope) has a rigid insertion section and can be directed to the target area. There is also a rigid endoscope that is inserted linearly.

Furthermore, electronic endoscopes (abbreviated as electronic endoscopes or electronic scopes) using solid-state imaging devices such as charge-coupled devices (abbreviated as COD) as imaging means have been put into practical use. This electronic probe has a higher resolution than a fiber probe that transmits observation images through fiber bundles, and it is easier to record and reproduce images, and it is also easier to perform image processing such as enlarging images and comparing two screens. It has certain advantages.

By the way, various types of rigid endoscopes have been proposed depending on the purpose. For example, in Japanese Utility Model Application Publication No. 61-115501, a hard first insertion part containing a relay lens,
A tooth root endoscope is provided with a second insertion portion having a narrow diameter and installed in a direction crossing the distal end of the first insertion portion and capable of being inserted into the root canal to observe the inside. Proposed.

There is also a demand for such endoscopes for tooth roots to be computerized and to improve performance such as resolution.

The present invention was made in view of the above circumstances, and has a small pumice stone and a high resolution. ,-1", it is an object of the present invention to provide an electronic endoscope device for dental roots that allows easy recording and reproduction of images.

[Means and effects for solving the problems] The dental root endoscope device of the present invention includes a first insertion section, a case provided at the end of the first insertion section, and a first insertion section provided in the case and a second insertion section extending in a direction intersecting the first insertion section and having an image transmission means for transmitting an optical image of the region to be inspected; It includes an imaging optical system that forms an image, and an imaging means that converts the image formed by the imaging optical system into an electrical signal.

In the present invention, the second insertion section is inserted into the root canal, and the observed image is transmitted by the image transmission means. The optical image transmitted by the image transmission means is focused on the imaging means by the imaging optical system and electrically converted.

[Embodiments] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

Figures 1 and 2 relate to the first embodiment; Figure 1 is an explanatory diagram of the overall configuration of the electronic endoscopic device for dental roots, and Figure 2 is a signal processing circuit of the electronic endoscopic device for dental roots. FIG.

The R-image method of the electronic endoscope device for dental roots of this embodiment is a frame sequential method.

A tooth root electronic endoscope device 1 of this embodiment includes a tooth root endoscope 2 and a light source device 3 that supplies illumination light to the tooth root endoscope 2.
a control device 4 that receives the electric signal from the dental root endoscope 2, processes the signal, and outputs a video signal; and a control device 4 that receives the video signal from the control device 4 and displays an image of the region to be inspected. It consists of a monitor 6, etc.

The tooth root endoscope 2 has a first insertion section 7 which is elongated and tubular, and a bevel 8 is provided at one end thereof, and an operating section 9 which also serves as a grip section is provided at the other end. It is being case 8
A second insertion portion 1 having a smaller diameter than the first insertion portion 7 is provided at the lower end of the
1 is provided so that its center line is substantially perpendicular to the center line of the first insertion portion 7. Further, a universal cord 12 extends from the lower end of the operating section 9. A light guide bundle 13 (optical fiber bundle) and a signal line 14.16 are inserted into the universal reel 5-12, and the light guide bundle 13 is connected to the light source device 3 by a connector 17, is connector 8.1
9 are each connected to the control device 4.

The case 8 consists of a substantially cylindrical upper case 26 and a lower case 27, and the second insertion portion 11 is protruded from the lower end of the lower case 27. This second insertion portion 11 has an outer tube 21, and an inner tube 22 is inserted into the outer tube 21, passing through a lower case 27 and reaching an upper case 26.

The light guide bundle 13 is disposed between the outer tube 21 and the inner tube 22, and the light guide bundle 1
3 extends from the side of the lower case 27 into the tubular member 30 forming the first insertion portion 7 . A self-focusing light guide 24 (for example, Lerhok Lens, trade name) is provided in the inner tube 22 as an image transmission means, and the upper case 26 is located on the optical axis of the self-focusing light guide 24. An imaging lens system 28 as imaging optics fixed within a lens frame 29 is provided inside. At the imaging position of the imaging lens system 28, within the lens frame 29 is a solid-state imaging device (abbreviated as COD) as an imaging means.

) 31 are provided. The imaging lens system 28 is configured to magnify the optical image and form it on the imaging surface of the CCD 31. Furthermore, a board 32 on which electronic components such as a drive circuit and an amplifier are mounted is provided behind the CCD 31.
The electric signal driven by the D31 or read from the CCD 31 is amplified and output. The signal line 14 is connected to the substrate 32. This signal line 14 extends into the tubular member 30 from the side of the upper case 26. The light guide bundle 13 and the signal line 14 are inserted through the tubular member 30 and reach the operating section 9. This operating portion 9 is connected to any connecting member 33 fixed to the tubular member 30 (
The connecting member 33 is rotatably connected to the operating section main body 34. Four sections 37 are provided in a circumferential manner on the end surface of the operating section side of the connecting member 33, and the inner diameter formed by the four sections 37 is The side end face extends toward the operating portion 9 side to form a narrow diameter portion 36. A ring-shaped sliding portion 38 formed on the operating portion main body 34 extends into the narrow diameter portion 36 so as to reach into the recess 37. An O-ring 39 is installed in the fourth part 37 as a watertight part to ensure watertightness between the connecting member 33 and the operating part main body 34. Furthermore, the end of the narrow diameter portion 36 on the operating section 9 side projects into the operating section main body 34, and a fixing nut 41 is screwed into this projecting portion to operate the connecting member 33. The fixing nut 41 is connected to the main body 34.
A screw 42 is screwed into the outer periphery of the main body 34 so that its head protrudes in the radial direction, while a connecting member 33 and
In other words, a convex portion 43 with which the head of the screw 12 comes into contact in order to restrict the range of rotation of the first insertion portion 7 about the axial center.
is set up.

Furthermore, a freeze switch 44 is installed on the main body 34 of the operation section to turn the image on the monitor 6 into a still image.
The signal line 16 connected to this freeze switch 44
is the signal line 14 which is slackened in the operating section main body 34.
and the operation unit main body 34 together with the light guide bundle 13.
It is inserted through the inside and extends from the lower end of the operating section main body 34.

Light source device 3 to which the light guide bundle 13 is connected
is configured as shown in Figure 2.

The light source device 3 includes a light source lamp 46 and a rotating color filter 47 that is a color transmitting filter for the three primary colors of red, green, and blue (not shown). This rotating color filter 47 is rotatably driven by a stepping motor 48, for example. The illumination light from the light source lamp 46 passes through the rotating color filter 47 and is sequentially converted into colors of red, green, and blue wavelengths, is condensed by a condensing lens 49, and enters the light guide bundle 13. It looks like this.

Further, the control device 4 controls the UCCD 31 by a drive clock applied from a drive circuit 51 mounted on the substrate 32.
A sample/hold circuit 53 is provided which inputs an electrical signal read out from φ and amplified by an amplifier 52.
. The sample/hold circuit 53 extracts the electrical signal processed video signal and outputs it to the γ correction circuit 54.

The γ correction circuit 54 performs γ correction on the input video signal and outputs it to the A/D converter 56. A/D converter 5
The signal digitized at 6 is repeated by a multiplexer 57 in synchronization with the color plane sequential illumination to sequentially produce red, green,
It is stored in the R frame memory 58, G frame memory 59, and G frame memory 60 corresponding to each color of blue. The respective frame memories 58, 59, and 60 are simultaneously read out in the horizontal direction at a speed matched to the monitor 6, and
/A converters 62, 63, and 64 convert the signal into an analog signal, resulting in R, G, and B color signals. And this R,G,
By outputting the B color signal to the monitor 6, the area to be inspected is displayed in color.

The operation of the dental root electronic endoscope 11 device 1 configured as described above will be explained.

The second insertion portion 11 is inserted into the root canal. The inspected site within the root canal is illuminated by illumination light emitted from the light source device 3 and transmitted by the light guide bundle 13. The reflected light from the inspected area enters the self-focusing light guide 24, is magnified by the imaging lens system 28, and is transmitted to the CCD 3.
The image is formed on the first imaging surface. The formed image is photoelectrically converted and read out as an electrical signal by a drive clock applied from a drive circuit 51, amplified by an amplifier 52, and sent to the control device 4 via a signal line 14.

The control device 4 performs the signal processing as described above, and displays an image of the region to be inspected on the screen of the monitor 6.

When the operator takes a still image of the monitor 6, the operator presses the freeze switch 44 with his or her finger. As a result, each frame memory 58, 59, and 60 prohibits new writing of a video signal and repeatedly outputs the same video signal, making the image on the monitor 6 a still image.

Further, the first insertion section 7 is rotated f! IJ? However, the light guide bundle 13 and the signal line 14 are provided with slack in the operating section main body 34, so they can be rotated easily and there is no possibility of wire breakage.

In this embodiment, there is no reflective member such as a mirror on the optical path leading to the CCD 31, and the optical image incident on the CCD 31 can be formed as a normal image, compared to the case where a real image is formed. This makes it easy to configure a signal processing circuit.

Furthermore, since the image formed on the CCD 31 is magnified by the imaging lens system 28, the resolution can be improved.

Furthermore, it is also possible to record images by connecting a video tape recorder or the like to the control device 4.

Figures 3 to 7 relate to the second embodiment of the present invention;
The figure is an explanatory diagram of the configuration of the electronic endoscope for tooth roots, Figure 4 is a cross-sectional view in the △-8 direction of Figure 3, Figure 5 is a cross-sectional view in the B-B' direction, and Figure 6 is a cross-sectional view in the C-C line. The sectional view in FIG. 7 is a block diagram of a signal processing circuit of the electronic endoscope device for dental roots.

The imaging method of the dental root electronic endoscope device of this embodiment is a simultaneous type.

The tooth root electronic endoscope device 66 of this embodiment is a tooth root endoscope 6
7. A light source device 68 that supplies illumination light to the tooth root endoscope 67, a control device 69 that receives electrical signals from the tooth root endoscope 67 and performs signal processing, and an image of the region to be inspected. and a display screen 6.

The tooth root endoscope 67 includes a first insertion section 71 and a first insertion section 71.
The second insertion part 72 is provided at one end of the insertion part 71 so as to be substantially orthogonal thereto, and the light guide and signal cable 70 are fixed to the end in use.

The second insertion portion 72 is equipped with a self-converging light guide 73 (for example, a product name: CellHock lens) as an image transmission means, and the incident end surface on which the optical image of the self-converging light guide 73 enters is The round taste is being taken in. Around this self-converging light guide 73, as shown in FIG.
The optical fibers made of wood are arranged at 76°76...

Note that the area around the self-converging light guide 73 is shielded from light by a light shielding material, so that the illumination light from the optical INs 76, 76, . . . does not leak.

The optical edges 11t76, 76... are bundled near the output end of the self-converging light guide 73 to form the light guide bundle 7.
4, it is formed to have a half-moon-shaped cross section as shown in FIG. 5, and extends along the lens frame 79 to the first insertion portion 71.

The lens frame 79 is provided at the output end of the self-converging light guide 73, and within this lens frame 79, a magnifying lens 77 and an imaging lens system 7 are installed from the self-converging light guide 73 side.
8 is provided so as to coincide with the optical axis of the self-focusing light guide 73. Note that the magnifying lens 77 and the imaging lens system 78 form an imaging optical system.

A color filter 81 is provided on the upper end surface of the imaging lens 78, which is a mosaic of separation filters that separate light into red, green, and blue, for example. Furthermore, this color filter 8
A CCD 31 as an imaging means is provided on the upper end surface of the sensor 1. This CCD 31 is a laminated substrate 8 that is inserted over the entire length of a tubular member 75 that constitutes a first insertion section 71.
The multilayer substrate 82 and the CCD 31 are electrically connected by a bonding wire 83. On the laminated substrate 82 (, CCD 3
An IC 84 constituting an amplifier for amplifying the electrical signal output from the CCD 31 is provided on the operation section side adjacent to the IC 84 and is electrically connected to the laminated substrate 82 and the bonding wire 83.

The CCD 31, the IC 84, the color filter 81, the lens frame 79, and the vicinity of the output end face of the self-converging light guide 73 provided on the laminated substrate 82 have electrical insulation and light shielding properties.
J is molded on a molded member 87 made of resin or the like.

As shown in FIG. 4, a light guide bundle 74 formed in a dovetail-shaped cross section is inserted into the laminated substrate 82 disposed inside the tubular member 75, and a light guide bundle 74 is inserted into the laminated substrate 82 disposed inside the tubular member 75. J leading to 0, turning into a sea urchin.

The laminated board 82 has a shield (GND) on the first layer, and a video signal system from the CCD 31 and a power supply voltage (V
[LD), a shield is placed on the third layer, a CCD31 drive signal system is placed on the fourth layer, and a shield is placed on the fifth layer to prevent noise from entering the video signal system from the drive signal system. There is.

An end of the laminated board 82 protrudes from the end of the tubular member 75 on the side of the light guide and signal cable 70, and the laminated board 82 has a light guide and a signal inserted through the signal cable 70. Line 86.86...
are electrically connected. This signal line 86.86...
The connecting portion of * is molded by a molded member 87. ,
The signal lines 86.6 are passed through the light guide and the signal line cable 70 and are connected to the control device 4. Further, the light guide bundle 74 inserted over the laminated substrate 82 is inserted through the line cable 70 to reach the light source device 68.

As shown in FIG. 7, the light source device 68 includes a light source lamp 46 that generates illumination light, and condenses the illumination light output from the light source lamp 46 and irradiates it onto the incident end face of the connected light guide bundle 74. It is composed of a condensing lens 49. The white light emitted from the light source lamp 46 is focused by the condensing lens 49, enters the light guide bundle 74 in the light guide and signal cable 70, and is emitted from the tip of the second insertion section 11. , to illuminate the area to be inspected. The white light reflected from the inspected area is transmitted through a self-converging light guide 73 to the CCD.
Red,
The light is split into green and blue colors. This red,
The light separated into green and blue colors is received by the image area of the CCD 31. This CCD31
An electric signal containing image information from the drive circuit 51 is applied from the drive circuit 51 or is sequentially output in the horizontal direction, for example, in synchronization with the one-click signal. This electrical signal is amplified by the amplifier 52 and input to a luminance signal processing circuit 89 and a color signal reproducing circuit 91. A luminance signal Y is generated from the luminance signal processing circuit 89, and a color difference signal 11 is generated from the color signal reproduction circuit 91.
Y and B-Y are generated in time series for each horizontal line, and white balance compensation is performed by a white balance circuit 92'c.

The output of this white balance circuit 92 is branched; one side is input to an analog switch 95, and the other side is delayed by one horizontal line by a one-day delay line 93.
−1 is input to the cog switch 94, and the analog switch 9
4.95 is timing generator switching (not shown) 4
No. 5 is used to generate color difference signals @R-Y and B-Y. The brightness 8Y and the color difference signals RY, BY are increased or decreased by an NTSC encoder 96 and input to the monitor 6, so that the observed region is displayed in color.

In the dental root electronic endoscope device 66 configured as described above, each of the light guide bundles (optical fiber bundles) 74 surrounds the self-converging light guide 73 that constitutes the second insertion section 72.
Since it is formed from real optical fibers 76, 76..., the outer diameter of the second insertion section 72 can be made small.

In addition, since the lens frame 79, CCD 31, IC 8/l, and other output QA ends of the self-converging light guide 73 are molded by the molding member 87, the size is reduced compared to storing this part in a box or the like. be able to.

Furthermore, since the shield board is disposed between the video signal system board and the drive system board of the CCD 31, it is possible to prevent noise from being mixed into the video signal.

Other effects are similar to those of the first embodiment.

Note that it is also possible to make the first insertion section 71 and the steering section 98 connectable as shown in FIG. 8.

In the figure, a signal connector receiver 99 and a light guide connector receiver 100 are provided at the end of the laminated board 82 on the side of the operating section 98. On the other hand, the operation unit 98 has a signal connector 101 which can be freely connected to the signal connector receiver (signal connector 99).
A light guide connector 102 that can be freely connected to the light guide connector receiver 100 is provided.

A connection case 103 is provided at the end of the first insertion section 71 on the operation section 98 side, and is configured to house the laminated board 82, the signal connector receiver 99, and the light guide connector receiver 100. There is.

A threaded portion 106 is provided at the lower end of the connection case 103 to engage with a connection ring 104 rotatably provided on the upper portion of the operation portion 98. A signal connector 101 is provided inside the operation portion 98. A plurality of signal lines 107 connected to the light guide connector 102 and a light guide bundle 74 are provided, and the connection ring 104 connects the first insertion section 71 and the operation section 98, and simultaneously connects the first insertion section 71 and the operation section 98. connector receiver 99 and signal connector 101,
Connector holder for light guide 100 and connector 1 to guide connector 102 are connected to each other.

The plurality of signal lines 107 and the light guide bundle 74 are inserted through the light guide and signal cable 70 and connected to a light source device and a control device (not shown).

The apparatus can be easily stored by removing the first operating section 71 and the operating section 98 as shown in FIG. Furthermore, several light guides and signal cables 70 of different lengths can be prepared and used depending on the conditions.

FIG. 9 is an explanatory diagram of the configuration of the distal end portion of a tooth root endoscope according to a third embodiment of the present invention.

In this embodiment, the substrate 32, which was provided behind the CCD 31 in the first embodiment, is provided inside the first insertion section 7.

In the figure, a substrate 32 on which a drive circuit, an amplifier circuit, etc. are mounted is disposed in the tubular member 30 constituting the first insertion portion 7 and near the case 8. A signal line 1/I from a CCD 31 housed in the case 8 is electrically connected to this board 32 .

The other configurations are similar to those of the first embodiment.

By moving the insulating plate 32 of this embodiment from inside the case 8 to the first insertion part 7, the outer shape of the case 8 that enters the patient's oral cavity can be made smaller, and the patient's pain can be alleviated. .

Other effects are similar to those of the first embodiment.

FIG. 10 is an explanatory diagram of the configuration of the distal end portion of a dental root endoscope according to a fourth embodiment of the present invention.

This embodiment uses the imaging lens system 28 and CCD 31 of the first embodiment.
The lens frame 29 that accommodates the board 32 and the board 32 is inserted into the first insertion section 7.
Inside the case 8 is a mirror 10 as a reflective member.
9 was set up.

In the figure, a tubular member 30 forming the first insertion portion 7
A lens frame 29 is provided near the case 8 at 5°C. Inside this lens frame 29, there is an image forming lens system 28, and an image forming position ffi of this image forming lens system 28.
CCD 31, C, CD 31 drive circuit, amplifier circuit, etc. are mounted on j, 4. A plate 32 is provided.

Furthermore, a mirror 109 is provided in the case 8 to bend the optical axis of the imaging lens system 28 at a substantially right angle to match the optical axis of the self-converging light guide 24. The optical image of the inspected area transmitted through the molded light guide 24 is reflected and imaged onto the CCD 31 via the imaging lens system 28.

The other configurations are the same as in the first embodiment.

By moving the lens frame 29 to the first insertion portion 7 and arranging the mirror 109 as in this embodiment, the outer size of the case 8 can be further reduced in size.

Other effects are similar to those of the first embodiment.

FIG. 11 is an explanatory diagram of the configuration of the distal end portion of a tooth root endoscope according to a fifth embodiment of the present invention.

In this embodiment, the CCD 31 is separated from the lens frame 29 of the fourth embodiment and is further provided on the operation section side.

In the figure, the first insertion part 7 is a first insertion part 7 for storing a lens frame.
The first tubular member 111 includes a second tubular member 112 having a larger diameter than the first tubular member 111.

Inside the first tubular member 111, the optical axis of the mirror 109 and
A lens frame 113 is provided to accommodate the imaging lens system 28 that is attached to the camera.

The second tubular member 112 is fitted onto the rear end of the first tubular member 111, and a CCD 31 is disposed at the imaging position of the imaging lens system 28.

Furthermore, a substrate 32 on which a drive circuit, an amplifier circuit, etc. are mounted is provided on the operation section side of the CCD 31.

The configuration of the square is similar to that of the first embodiment.

In this embodiment, the CCD 31 is moved from the distal end side of the first insertion section 7, that is, the section that may enter the patient's oral cavity, to the operation section side. 11
11) can be made smaller in diameter, reducing patient pain.

Other effects are similar to those of the first embodiment.

FIG. 12 is an explanatory diagram of the configuration of the distal end portion of a tooth root endoscope according to a sixth embodiment of the present invention.

In this embodiment, the imaging lens system 28 of the first embodiment is omitted, and
The output end face of the self-converging light object 24 is brought into contact with the imaging surface of the CCD 31.

Other configurations and effects are the same as in the first embodiment.

Each device of the electronic endoscopic device 1 for dental roots described in each of the above embodiments may be arranged as shown below.

In FIGS. 13 to 15, a surgeon's chair 117 is movably provided near the examination bed 116.

The operator's chair 117 is provided with a backrest portion 118, and under the seat portion 119 are provided a light source device 3, a control device 4, and a video camera 121 for recording observation images.
There is. Furthermore, casters 122 are installed at the bottom of the operator's chair 117.
is movable.

The seat has a first support 123 that stands upright in the vertical direction from the side of the part 119, and the upper end of the first support 123 is rotatable about the axis of the first support 123 (arrow D). )
A second support 124 is provided at the. Second pillar 12
A third support 126 is provided at the upper end of the support 4 in a substantially horizontal direction, and is designed to swing in the vertical direction (arrow E) about a first fulcrum 127.

A fourth support 128 is provided at the tip of the third branch 126 so as to form a substantially right angle thereto. This fourth pillar 12
8 is on a substantially horizontal plane centered on the second fulcrum 129 (arrow F
).

An operation panel 131 is provided at the tip of the fourth support 128,
A holding base 132 that holds the monitor 6 rotates (arrow G) L around a third fulcrum 133 to change the inclination of the screen of the monitor 6.

By the way, the surgeon sitting on the chair 117 performs diagnosis and treatment using the monitor 6, and uses the operation panel 131 to turn on/off the light source device 3, adjust the brightness, and video blur as necessary.
- Performs on/off operations of the camera 121, on/off operations of the control device 4, release, freeze, etc. In addition, the surgeon selects the first to fourth pillars 123.
The monitor 6 can be moved to a position where examination can be easily performed by avoiding rotations of 124 degrees, 126 degrees, and 128 degrees.

Furthermore, since each device is installed on the chair 117, arrows can be placed around the examination bed 116 at positions where it is easiest to operate, depending on the location of the lesion to be examined and treated, as shown in FIG. Move within the range of H.

Note that the first support column 123 may be provided to extend beyond the backrest portion 118.

Furthermore, a monitor 6 may be provided on the examination bed 116 as shown in FIGS. 16 to 19.

In FIG. 16, there are pillars 1 on the spinal surface of the examination bed 116.
36 are set C]. The upper end of this support 136 is rotatable (arrow I) with respect to the axial center of this support 136.
A rotating member 137 is provided at.

The rotating member 137 has a support base 1 on which the enitor 6 is placed.
38 is provided so as to be able to swing in the vertical direction (arrow J) about a fulcrum 139.

This support stand 138 can always keep the monitor 6 in a horizontal state regardless of the square claw α of the examination bed 116, and can adjust the angle J; by moving the monitor 6 in one direction, it can be moved in any direction. It is now possible to be directed towards.

In addition, in FIG. 17, a second support 141 is provided at the upper end of the support 136 in a substantially horizontal direction so as to be able to swing vertically (arrow K) about a first fulcrum 142. At the tip of the second column 141, in front of the patient,
A support stand 138 is provided so as to be rotatable in the direction shown by arrow M.

Further, the second support column 141 and the support base 138 can be swung in the direction of the arrow. A monitor 6, which is a liquid crystal television camera, is provided on the support stand 138.

In FIG. 18, the branch office 136 is installed on the pillow 146 provided on the examination bed 116.Other #IJIi are the same as in FIG. 17.With this configuration, the angle N of the pillow 146 is There is no need to adjust the orientation and angle of the monitor 6 since the support column 136 also moves together with the adjustment.

FIG. 19 shows a support stand 138 that can be folded behind a pillow 146. J to configure it like this,
Therefore, the monitor 6 can be easily stored when not in use. In addition, it may be made into a pull-out type instead of a foldable type and pulled out above the examination bed 116.

FIG. 20 shows the monitor 6 mounted on a cap-shaped monitor support 143 that is placed on the patient's head.

The diseased area is displayed on the monitor 6 by a television camera 147 connected to a dental root endoscope 144, and the operator can perform diagnosis and treatment by observing the monitor 6. In addition, holder 1
43 may be made into a band shape instead of a hat shape and fixed to the head.

[Effects of the Invention] As described above, according to the present invention, by digitizing the dental root endoscope, it is lightweight and compact, has high resolution, and can easily record and reproduce images.

[Brief explanation of the drawing]

1 and 2 relate to the first embodiment, FIG. 1 is an explanatory diagram of the overall configuration of the electronic endoscope device for tooth roots, and FIG. 2 is an illustration of the signal processing circuit of the electronic endoscope device for tooth roots. [Figure 1, 3rd
7 to 7 relate to the second embodiment of the present invention, FIG. 3 is an explanatory diagram of the configuration of an electronic endoscope for tooth roots, and FIG. 4 is A of FIG. 3.
-A′ direction sectional view, FIG. 5 is a B-B′ direction sectional view, FIG. 6 is a C-C- direction sectional view, FIG. 7 is a block diagram of the signal processing circuit of the electronic endoscope device for dental roots, FIG. 8 is a modification of the second embodiment, and is an explanatory diagram of the configuration of the operating section that can be removed by mistake. FIG. 9 is a diagram showing the configuration of the distal end of the dental root endoscope according to the third embodiment of the present invention. FIG. 10 is an explanatory diagram of the configuration of the distal end of a tooth root endoscope according to the fourth embodiment of the present invention, and FIG.
Figure 12 is an explanatory diagram of the configuration of the distal end of a dental root endoscope according to the fifth embodiment of the present invention, and Fig. 12 is an explanatory diagram of the configuration of the distal end of a dental root endoscope according to the sixth embodiment of the present invention. FIG. 13 is an explanatory diagram of the operator's chair, FIG. 14 is a side view of the operator's chair, and FIG. 15 is an explanatory diagram showing the movement range of the operator's chair. 19 to 19 are explanatory diagrams of the examination bed, and FIG. 20 is an explanatory diagram of the monitor support. 1... Electronic endoscope device for tooth roots 2... Endoscope for tooth roots 3... Light source device 4...Control device 7...First insertion section 8...Case
9...Operation unit 13...Light guide bundle 24...Self-focusing light guide 31...Solid-state image sensor No. 11 Fig. 13 Fig. 14

Claims (1)

[Claims] A first insertion portion; a case provided at an end of the first insertion portion; and a case provided in the case and extending in a direction intersecting the first insertion portion. a second insertion section having an image transmission means for transmitting an optical image of the region to be inspected; an imaging optical system within the case that forms the optical image transmitted by the image transmission means; An electronic endoscope device for dental roots, comprising: an imaging means for converting an image formed by the imaging optical system into an electrical signal.