JP3673157B2 - Electric angle type electronic endoscope device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention drives an electric motor or the like provided in an external device on the basis of an electric signal output from an operation switch of an operation unit, and uses this driving force to perform an electric angle type electronic that performs a bending operation of the bending unit constituting the insertion unit. The present invention relates to an endoscope apparatus.
[0002]
[Prior art]
2. Description of the Related Art In recent years, endoscopes that can perform various examinations and treatments by inserting a long and thin insertion portion into a body cavity and inserting a treatment tool into a treatment tool channel as necessary are widely used. These endoscopes use a solid-state imaging device such as a charge-coupled device (CCD) as the imaging means, and the subject image formed on the CCD is converted into an electrical signal and further an image signal to display the subject image on the monitor screen. There are electronic endoscopes that can be observed.
[0003]
In this electronic endoscope, the insertion portion is flexible, and a plurality of bending pieces are connected to the insertion portion so that the bending portion can be bent in the vertical and horizontal directions. There is something that can be inserted into. The bending operation of the bending portion is, for example, a manual angle type electronic internal device that performs a bending operation of the bending portion by manually operating a bending operation knob provided in an operation portion that also serves as a gripping portion that is located at the proximal end of the insertion portion. Electric angle type electronic endoscope that operates the bending motor by driving the electric motor by operating the bending operation switch that is one of the electric switches provided in the endoscope and the operation unit. There is a mirror.
[0004]
As an electric angle type electronic endoscope provided with an electric motor for bending the bending portion, there is an endoscope shown in JP-A-3-228728, and in this endoscope, an electric motor is provided in an operation portion, The bending portion is bent by the driving force of the electric motor to pull the bending wire.
[0005]
However, since this endoscope is provided with electric parts and mechanism parts such as an electric motor, an encoder, and a clutch serving as a driving part in the operation part, there arises a problem that the operation part becomes large and heavy. In addition, exposure of the endoscope to a high-humidity environment, such as cleaning, degrades the characteristics of the electrical and mechanical components, and the electronic endoscope against the current from the electrical components that make up the drive unit. There is a problem that the circuit configuration for separating the drive unit side to the secondary circuit side on the patient circuit side becomes complicated.
[0006]
In JP-A-6-22904, for example, an electric motor is provided in a control device which is an external device, and the driving force of the electric motor is provided at the base end portion of a universal cord extending from the operation portion of the electronic endoscope. 1 shows an electric endoscope apparatus in which a bending wire is pulled to cause a bending portion to bend by transmitting to a gear which is a driving force transmission mechanism member in the connector. According to this electric endoscope apparatus, it is possible to reduce the size of the operation unit, and to solve the problems during cleaning and the circuit configuration.
[0007]
[Problems to be solved by the invention]
However, in the electric endoscope apparatus disclosed in Japanese Patent Laid-Open No. 6-22904, for example, when replacing a manual angle type electronic endoscope in which a bending portion is manually operated, a manual angle type electronic endoscope may be used due to a difference in connector structure or the like. It becomes impossible to use the light source device of the endoscope. For this reason, expensive light source devices must be replaced. That is, there is a problem that the light source device used in the manual angle type electronic endoscope becomes unnecessary.
[0008]
The present invention has been made in view of the above circumstances, and it is possible to use a light source device used in a manual angle type electronic endoscope, and an electric angle type electronic endoscope excellent in washing and medical electrical safety. It aims to provide a mirror device.
[0009]
[Means for Solving the Problems]
An electric angle type electronic endoscope apparatus according to the present invention includes a light source, an air supply source, and a light source apparatus having an air supply line communicating with the air supply source for supplying illumination light and gas to the endoscope ; ,
An insertion portion having a bending portion , an observation means for observing the inside of the body cavity and an illuminating means for illuminating the inside of the body cavity, and a bending operation switch, an air supply switch, and a water supply provided on the proximal end side of the insertion portion An operation portion having a switch, a connector portion provided on the proximal end side of the universal cord extending from the operation portion and detachable from the light source device, a distal end side connected to the bending portion, and a proximal end side An electric angle type electronic endoscope provided with a pulling member disposed inside the connector and bending the bending portion according to a pulling operation ;
A drive control device for outputting a control signal corresponding to each operation of the bending operation switch, the air supply switch, and the water supply switch ;
A fluid device that is connectable to the drive control device and that supplies a fluid in response to the control signal output from the connected drive control device ;
A drive device that is connectable to the drive control device and generates a drive force in accordance with the control signal output from the connected drive control device ;
A connecting portion provided in the connector portion, including an electrical connector portion for transmitting the control signal to the drive control device, and connectable to the drive device ;
A driving force transmitting member that is provided in the driving device and transmits the driving force of the driving device generated in response to an operation of the bending operation switch to the traction member when connected to the connecting portion ;
A closing member that is provided in the connector portion and closes the air supply conduit in order to block air supply of the light source device ;
A base that is provided in the connector so as to be able to supply the fluid from the fluid device to the electric angle electronic endoscope, and is connectable to the fluid device ;
It is characterized by comprising .
[0010]
Further, the driving force transmitting member in the electric angle electronic endoscope apparatus of the present invention, characterized by being formed of an insulating member for blocking the leakage current from the drive portion of the bending drive unit.
[0011]
According to this configuration, the operability can be improved by reducing the size and weight of the operation unit, and reliable medical electrical safety can be ensured. In addition, it is possible to construct an electric angle type electronic endoscope apparatus by using a light source device of a manual angle type electronic endoscope having an air supply conduit.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 relate to an embodiment of the present invention, FIG. 1 is a diagram for explaining the configuration of an electric angle type electronic endoscope apparatus, and FIG. 2 is a configuration example of a connector portion of the electric angle type electronic endoscope. FIG. 3 is a diagram for explaining the configuration of the connecting portion and the bending drive device, FIG. 4 is a view for explaining the constitution of the bending drive device, and FIG. 5 is a view for explaining a state where a watertight cap is attached to the connecting portion. FIG. 6 is a view showing the bending wire in a bent state between the insertion portion and the universal cord.
3A is a view showing a connection state in which the bending drive device is connected to the second connection portion, and FIG. 3B is a view for explaining the relationship between the bending wire and the wire side spur gear.
[0013]
An electric angle type electronic endoscope apparatus (hereinafter abbreviated as an electronic endoscope apparatus) 1 of the present embodiment shown in FIG. 1 is, for example, a medical electric angle type electronic endoscope (hereinafter abbreviated as an endoscope). 2, a light source device 3, an image processing device 4, a drive control device 5, a fluid device 6, and a bending drive device 7. The video signal generated by the image processing device 4 is output to a display device (not shown) through the video cable 4a, and an endoscopic image is displayed on the screen of the display device.
[0014]
The endoscope 2 includes an elongated insertion portion 2a that is inserted into a body cavity, an elongated operation portion 2b that also serves as a grip portion disposed on the proximal end side of the insertion portion 2a, and an extension from the operation portion 2b. It is mainly composed of a universal cord 2c to be taken out.
[0015]
The insertion portion 2a includes a rigid distal end portion 21 incorporating an image pickup element 21a in order from the distal end side, a bending portion 22 formed by connecting a plurality of bending pieces so as to be bent in the vertical and horizontal directions, and a flexible flexible. The pipe part 23 is provided continuously.
[0016]
For example, a joystick-type bending operation switch 24 such as a potentiometer or a pressure-sensitive sensor that operates the bending portion 22 in a desired direction as an electric switch that outputs an electric signal to the operation unit 2b, or a suction button 25 that instructs suction. Operation switches such as an air supply button 26 for instructing air supply and a water supply button 27 for instructing water supply are provided in a watertight manner.
An endoscope connector 2d composed of a first connecting portion 31 and a second connecting portion 32 is provided at the base end portion of the universal cord 2c.
[0017]
Reference numeral 41 denotes a bending wire that is a pulling member that transmits driving force, reference numeral 42 denotes an imaging cable that extends from the imaging element 21a to transmit and receive signals, reference numeral 43 denotes a light guide fiber that transmits illumination light, and reference numeral 44 denotes This is a signal cable in which signal lines extending from the bending operation switch 24, the suction button 25, the air supply button 26, and the water supply button 27 and transmitting instruction signals are collected. Further, a suction tube, a water supply tube, and an air supply tube (not shown) are inserted through the insertion portion 2a and the universal cord 2c.
[0018]
The light source device 3 includes a lamp (reference numeral 51 in FIG. 2) that generates illumination light for observation, and the illumination light from the lamp 51 is transmitted to the distal end portion 21 through the light guide fiber 43 and is not shown. The observation site is irradiated through the window.
[0019]
The image processing device 4 includes a signal processing unit (refer to reference numeral 4a in FIG. 2) electrically connected to the imaging cable 42, and outputs a drive signal for driving the imaging element 21a, while the imaging element 21a. An image signal of an optical image formed on the imaging surface and photoelectrically converted into an electric signal is received, a video signal is generated and output to a display device.
[0020]
The drive control device 5 includes a control unit (see reference numeral 5a in FIG. 2) that is electrically connected to signal lines extending from the bending operation switch 24, the suction button 25, the air supply button 26, and the water supply button 27, respectively. The control unit 5a outputs a control signal to the fluid device 6 and the bending drive device 7.
[0021]
The fluid device 6 includes a plurality of solenoid valves (see reference numerals 6a, 6b, and 6c in FIG. 2) that are controlled based on a control signal output from the drive control device 5, and performs suction, air supply, and water supply. .
[0022]
The bending drive device 7 includes an electric motor 70 serving as a drive unit that generates a drive force based on a control signal output from the drive control device 5. The driving force of the electric motor 70 is transmitted to the bending wire 41 via a driving force transmission mechanism that is detachably attached to the second connecting portion 32, which will be described later. As a result, the bending portion 22 performs a bending operation in accordance with an instruction signal from the bending operation switch 24.
[0023]
Reference numeral 8a denotes a first signal transmission cable that electrically connects the first connecting portion 31 from which the imaging cable 42 extends and the image processing device 4, and reference numeral 8b denotes a second connecting portion 32 from which the signal cable 44 extends. A second signal transmission cable for electrically connecting the drive control device 5 and the drive control device 5, reference numeral 8c is a first electric cable for transmitting a control signal from the drive control device 5 to the fluid device 6, and reference numeral 8d is a drive control device 5 Reference numeral 9a, 9b, 9c is a tube that connects the fluid device 6 and the first connecting portion 31, and specifically 9a is a suction tube, a second electric cable that transmits a control signal to the bending drive device 7. Reference numeral 9b is a water supply tube, and reference numeral 9c is an air supply tube.
[0024]
Here, with reference to FIG.2 and FIG.3, the structure of the endoscope connector 2d and the bending drive apparatus 7 is demonstrated.
Note that the light source device 3 of the electronic endoscope device 1 of the present embodiment is a light source device used in a manual angle type electronic endoscope, and illumination light is contained in the light source device 3 as shown in FIG. A lamp 51 that emits light, a condensing lens 52 that condenses illumination light emitted from the lamp 51 on the base end surface of the light guide connector 33 protruding from the first connecting portion 31, an air supply pump 53 for supplying air, and an air supply tube A passage 54 and an air supply base 55 are provided.
[0025]
As shown in FIGS. 2 and 3A, the endoscope connector (hereinafter abbreviated as “connector”) 2 d includes a first connecting portion 31 and a second connecting portion 32. A light guide connector 33 having the light guide fiber 43 inserted therein and an opening blocking member 34 for closing the opening of the air supply base 55 protrude from the proximal end portion of the first connecting portion 31. .
[0026]
Further, a first electric connector 35 to which the first signal transmission cable 8a is electrically connected, a suction cap 36a to which the suction tube 9a is connected, and a water supply tube 9b are connected to the side peripheral surface of the first connection portion 31. An air supply base 36b to which the water supply base 36b and the air supply tube 9c are connected is provided.
[0027]
On the other hand, a second electric connector 37 to which the second signal transmission cable 8b is electrically connected is provided at an end of the second connecting portion 32, and the bending drive device 7 is detachable on a side peripheral surface. A connection port 38 serving as a connection mechanism portion to be connected and fixed is provided. A pulley 62 integral with the wire side spur gear 61 is provided in the second connecting portion 32, and the bending wire 41 is disposed so as to be advanced and retracted by the pulley 62.
[0028]
The wire-side spur gear 61 meshes with an idler 71 formed in a predetermined size and shape by a resin member that is an insulating member as a driving force transmission mechanism provided in the bending drive device 7. . The idler 71 meshes with the drive side spur gear 76 of the bending drive device 7.
[0029]
Therefore, by fixing the connecting portion 7b of the bending driving device 7 to the connecting port 38 of the second connecting portion 32 by, for example, screwing, the rotational driving force of the driving side spur gear 76 is wired by the idler 71. The bending wire 41 transmitted to the side spur gear 61 and disposed on the pulley 62 advances and retreats, and the second connecting portion 32 and the bending driving device 7 are separated by a predetermined interval by an idler 71, and will be described later in the bending driving device 7. The leakage current from the electrical component is prevented from flowing to the second connecting portion 32.
[0030]
As shown in FIG. 3 (b), the bending wire 41 has an upper and lower bending wire, the upper and lower bending wire 41a is disposed on an upper and lower pulley 62a, and the left and right bending wire 41b is a left and right bending wire 41b. The pulleys 62b are arranged respectively. Reference numeral 63 denotes a potentiometer for detecting the amount of rotation of the wire-side spur gear 61. Potentiometers 63a and 63b for detecting the amount of rotation of the wire-side spur gears 61a and 61b and controlling the amount of movement of the wire are provided. Yes.
[0031]
The configuration of the bending drive device 7 will be described with reference to FIG.
As shown in the drawing, an outer case 7a having a connecting portion 7b constituting the bending drive device 7 is formed of, for example, a resin member having insulation properties. In the exterior case 7a, an up / down driving unit 70a for operating the up / down bending wire 41a and a left / right driving unit 70b for operating the left / right bending wire 41b are disposed. .
[0032]
The vertical drive unit 70a and the left / right drive unit 70b include, for example, electric motors 73a and 73b in which drive force transmission spur gears 72a and 72b are arranged on a drive shaft, and the spur gear 72a, 72b, clutches 75a, 75b connected to each other by gear trains 74a, 74b constituting a speed reduction mechanism to transmit driving force, and driving side spur gears, such as spur gears, which are provided in the clutches 75a, 75b and output driving force. 76a and 76b.
[0033]
The idler 71 also has an upper and lower side and a left and right side, and the vertical drive idler 71a meshes with the vertical drive side spur gear 76a, and the left and right idler 71b meshes with the left and right drive side spur gear 76b. Yes. The electric motors 73a and 73b are driven in accordance with a control signal input from the drive control device 5 via the second electric cable 8d. Reference numeral 56 denotes a support plate made of, for example, metal, which is disposed integrally with the light source device 3 and has rigidity to support the second connecting portion 32 of the connector 2d.
[0034]
The operation of the electronic endoscope apparatus 1 configured as described above will be described.
First, the light guide connector 33 protruding from the end of the connector 2 d provided at the end of the universal cord 2 c extending from the operation unit 2 b of the endoscope 2 is attached to a predetermined position of the light source device 3. Then, the end surface of the light guide connector 33 is disposed at a predetermined position on the optical axis of the lamp 51, and an opening blocking member 34 protruding from the vicinity of the light guide connector 33 is provided in the light source device 3. The opening of the air supply base 55 is closed. At this time, the second connecting portion 32 is supported by the support plate 56.
[0035]
In this state, the connector 2d, the image processing device 4, the drive control device 5, and the fluid device 6 are connected via the first signal transmission cable 8a, the second signal transmission cable 8b, the suction tube 9a, the water supply tube 9b, and the air supply tube 9c. Finally, the bending drive device 7 provided at the tip of the second electric cable 8d is connected to the second connecting portion 32. At this time, since the second connecting portion 32 is supported by the support plate 56, the bending driving device 7 including the driving portions 70a and 70b is in a mechanically and electrically stable connection state.
The drive control device 5 and the fluid device 6 are in an electrical connection state in advance by the first electric cable 8c.
[0036]
Next, the surgeon inserts the insertion portion 2a into the body cavity. At this time, the surgeon inserts the distal end portion 21 of the insertion portion 2a toward the observation site while observing the endoscopic image displayed on the screen of the display device. At this time, the surgeon operates the bending portion 22 by operating the bending operation switch 24 with the finger of the left hand holding the operation portion 2b as necessary.
[0037]
Then, an instruction signal is output from the bending operation switch 24 to the drive control device 5 via the signal cable 44 and the second signal transmission cable 8b. Then, a control signal is output from the drive control device 5 to the electric motor 70a of the vertical drive portion 70a, which is a predetermined drive portion of the bending drive device 7 via the second electric cable 8d.
[0038]
As a result, the electric motor 70a is rotationally driven, and the driving force of the electric motor 70a is such that the driving force transmission spur gear 72a, the vertical gear train 74a, the vertical clutch 75a, the vertical driving side spur gear 76a, The bending wire 41a, which is transmitted to the wire side spur gear 61 in the second connecting portion 32 via the idler 71a and is disposed on the pulley 62 integral with the wire side spur gear 61, moves in a predetermined direction by a predetermined amount. The bending portion 22 performs a bending operation.
[0039]
Further, when the operator operates operation buttons such as the suction button 25, the air supply button 26, and the water supply button 27 (assuming that the air supply button 26 is operated here), the signal cable 44, An instruction signal is output to the drive control device 5 via the second signal transmission cable 8b, and a control signal is output from the drive control device 5 to the fluid device 6 via 8c.
[0040]
As a result, the electromagnetic valve 6c of the fluid device 6 is opened, and the air from the air supply pump 6d is provided at the distal end portion 21 through the air supply tube 9c, the air supply base 36c, and the air supply tube. It is ejected from the nozzle that does not.
[0041]
After the inspection is completed, the first signal transmission cable 8a, the second signal transmission cable 8b, the suction tube 9a, which are connected to the connector 2d and connect the image processing device 4, the drive control device 5, and the fluid device 6. The water supply tube 9b, the air supply tube 9c, and the bending drive device 7 are removed, and a watertight cap 77a is attached to the connection port 38 as shown in FIG. 5, and the watertight caps 77b and 77c are respectively connected to the first electrical connector 35 and the second electrical connector. Attach to 37 and wash.
[0042]
As described above, the pulley on which the bending wire is arranged is integrated, and the wire side spur gear that is detachably engaged with the idler of the bending drive device is arranged in the endoscope connector, and the first electric side is provided on the side portion of the connector. Electric angle by providing a connector, suction base, water supply base, air supply base, second electrical connector and connecting port, as well as a light guide connector and an opening blocking member at the connector end to form an endoscope connector By configuring the electronic endoscope, that is, by providing the drive unit in the external device, the configuration of the endoscope operation unit can be simplified and reduced in weight, and after the endoscope is used Endoscope cleaning workability can be improved. As a result, by appropriately operating an electric switch provided in the operation unit, the bending drive device or the fluid device which is an external device is driven to perform bending operation of the endoscope insertion unit, suction, air supply, water supply, etc. Various operations can be performed.
[0043]
Also, by providing a light guide connector and an opening blocking member at the end of the endoscope connector, the endoscope connector is attached to the light source device used in the manual angle type electronic endoscope. Endoscopic observation can be performed. This reduces the financial burden by eliminating the need to replace an expensive light source device when replacing a manual angle electronic endoscope with an electric angle electronic endoscope.
[0044]
In addition, the drive force of the bending drive device is transmitted from the drive-side spur gear to the wire-side spur gear by an idler formed to a predetermined size with an insulating member, and the exterior case that covers the drive unit is formed of the insulating member By doing so, it is possible to easily prevent medical inconvenience by preventing a problem that leakage current generated from the bending drive device is transmitted to the electric angle type electronic endoscope side via the second connecting portion.
[0045]
In addition, the bending wire which penetrates the inside of an insertion part is bent toward the insertion part 2a from the universal cord 2c by the pulley 28 arrange | positioned at the lower end part side of the operation part 2b, as shown in FIG. As a result, even when the bending angle becomes an acute angle, the bending wire 41 smoothly slides and the driving force is transmitted. Further, the arrangement positions of the operation switches and the caps are not limited to the positional relationship shown in the figure.
[0046]
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.
[0047]
【The invention's effect】
As described above, according to the present invention, there is provided an electric angle type electronic endoscope apparatus that can use the light source device used in the manual angle type electronic endoscope and is excellent in washing and medical electrical safety. Can be provided.
[Brief description of the drawings]
FIG. 1 to FIG. 6 relate to an embodiment of the present invention, and FIG. 1 is a diagram illustrating the configuration of an electric angle type electronic endoscope apparatus. FIG. 2 is a connector portion of an electric angle type electronic endoscope. FIG. 3 is a diagram illustrating a configuration of a connecting portion and a bending drive device. FIG. 4 is a diagram illustrating a configuration of the bending drive device. FIG. 5 is a state in which a watertight cap is attached to the connecting portion. FIG. 6 is a diagram showing a bending wire in a bent state between an insertion portion and a universal cord.
DESCRIPTION OF SYMBOLS 1 ... Electric angle type electronic endoscope apparatus 2 ... Electric angle type electronic endoscope 2a ... Insertion part 2b ... Operation part 2c ... Universal cord 2d ... Endoscope connector 3 ... Light source device 38 ... Connection port 4 ... Image processing apparatus DESCRIPTION OF SYMBOLS 5 ... Drive control apparatus 6 ... Fluid apparatus 7 ... Curve drive apparatus 7a ... Exterior case 7b ... Connection part 31 ... 1st connection part 32 ... 2nd connection part 61 ... Wire side spur gear 70 ... Electric motor 71 ... Idler 76 ... Drive Side spur gear

Claims (2)

A light source device including a light source for supplying illumination light and gas to the endoscope, an air supply source, and an air supply conduit communicating with the air supply source ;
An insertion portion having a bending portion , an observation means for observing the inside of the body cavity and an illuminating means for illuminating the inside of the body cavity, and a bending operation switch, an air supply switch, and a water supply provided on the proximal end side of the insertion portion An operation portion having a switch, a connector portion provided on the proximal end side of the universal cord extending from the operation portion and detachable from the light source device, a distal end side connected to the bending portion, and a proximal end side An electric angle type electronic endoscope provided with a pulling member disposed inside the connector and bending the bending portion according to a pulling operation ;
A drive control device for outputting a control signal corresponding to each operation of the bending operation switch, the air supply switch, and the water supply switch ;
A fluid device that is connectable to the drive control device and that supplies a fluid in response to the control signal output from the connected drive control device ;
A drive device that is connectable to the drive control device and generates a drive force in accordance with the control signal output from the connected drive control device ;
A connecting portion provided in the connector portion, including an electrical connector portion for transmitting the control signal to the drive control device, and connectable to the drive device ;
A driving force transmitting member that is provided in the driving device and transmits the driving force of the driving device generated in response to an operation of the bending operation switch to the traction member when connected to the connecting portion ;
A closing member that is provided in the connector portion and closes the air supply conduit in order to block air supply of the light source device ;
A base that is provided in the connector so as to be able to supply the fluid from the fluid device to the electric angle electronic endoscope, and is connectable to the fluid device ;
It is provided with an electric angle electronic endoscope apparatus according to claim. The driving force Den Itarubu material, electric angle electronic endoscope apparatus according to claim 1, characterized by forming an insulating member to block the leakage current from the drive portion of the bending drive unit.

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