JP4483999B2 - Universal cord connection structure of endoscope - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure of a universal cord connected to a light source device or the like to a main body operation unit in an endoscope such as a laparoscope.
[0002]
[Prior art]
An endoscope is generally configured by connecting an insertion part into a body cavity to a main body operation part and pulling out a universal cord connected to the light source device from the main body operation part. There are a gastroscope, a duodenoscope, a colonoscope and the like that are inserted from the oral cavity, anus, and the like, and a laparoscope that is configured to be directly inserted into the body cavity from the body epidermis. FIG. 5 shows a state in which a body cavity inspection is performed using a laparoscope.
[0003]
In the figure, 1 is an endoscope and 5 is a trocar. The endoscope 1 is formed by connecting an insertion portion 3 into a body cavity to a main body operation unit 2, and the insertion unit 3 has a predetermined length from the connection portion to the main body operation unit 1. It is a hard part 3a made of a hard pipe, and an angle part 3b is connected to the hard part 3a, and a distal end hard part 3c is connected to the angle part 3b. In the case of a laparoscope, there is a case where the entire insertion portion is made of a rigid member and no angle portion is provided. As is well-known, the distal end hard portion 3c includes an illumination mechanism and an observation mechanism. In order to transmit illumination light to the illumination mechanism, a light guide composed of optical fiber bundles is used. The light guide extends from the distal end hard portion 3c to the main body operation portion 2, and a universal cord 4 is drawn out from the main body operation portion 2. The other end of the universal cord 4 is a light source device (not shown). Will be connected to. When a solid-state imaging device is used as an observation mechanism, a cable from the solid-state imaging device is also inserted into the universal cord 4, and this cable is connected to a device that processes a video signal, that is, a processor.
[0004]
The insertion part 3 of the endoscope 1 is inserted through the abdominal wall and inserted into the abdominal cavity. Therefore, the insertion part 3 alone cannot be inserted into the abdominal cavity. For this purpose, the trocar 5 is used. The trocar 5 is composed of a hollow guide tube 6 and a base end portion of the guide tube 6, and includes a holder block 7, and the guide tube 6 serves as a passage into the abdominal cavity of the insertion portion 3. . Then, in order to secure a visual field when inspecting the abdominal cavity and to safely perform the necessary treatment, an abdominal gas such as CO ₂ gas is supplied into the abdominal cavity and inflated. A check valve is built in the holder block 7 so that this abdominal gas does not flow out between the inner surface and the outer surface of the insertion portion 3.
[0005]
The trocar 5 can be inserted into the abdominal cavity by partially incising the abdominal wall and guiding the abdominal wall from the incision to the abdominal cavity. In some cases, the inner needle is configured to penetrate the abdominal wall directly from the body surface and into the abdominal cavity. When the distal end of the guide tube 6 is guided into the abdominal cavity, the inner needle is removed and the insertion portion 3 is inserted into the guide tube 6.
[0006]
Here, the laparoscope is inserted into the body epidermis at the optimal location for examination and treatment and from the optimal direction. Then, in order to perform an inspection using the endoscope 1, an operator or the like needs to grasp the main body operation unit 2 with his hand and bend the angle portion 3b of the insertion unit 3 in a desired direction, so that it is necessary in the abdominal cavity. A good viewing field. Further, since the abdominal wall is flexible, the visual field can be changed by tilting the main body operation unit 2 in an appropriate direction. When the field of view by the endoscope 1 becomes the most desirable field of view for performing appropriate treatment, for example, removal of the liver, etc., the endoscope 1 is fixedly held in that state, One or a plurality of trocars are inserted into the abdominal cavity, and a treatment tool for excision of the affected part is introduced into the abdominal cavity via these other trocars, and treatment with these treatment tools is performed under the observation of the endoscope 1 It will be. As a result, since there is an advantage that necessary treatment can be performed in a very short time while minimizing damage to a patient or the like, it has been established as a widely used technique in recent years.
[0007]
[Problems to be solved by the invention]
By the way, also in a laparoscope, a universal cord is pulled out from the main body operation part, and this universal cord is connected with the light source device etc. which were installed in the predetermined position. Therefore, the pulling direction of the universal cord from the main body operation unit is determined by the relationship between the position of the main body operation unit and the position of the light source device. Unlike endoscopes of a type that is inserted from a predetermined position and direction such as the oral cavity, the laparoscope has an insertion position and an insertion direction from the body epidermis at the insertion portion, so this insertion position and Depending on the insertion direction, the universal cord pulled out from the main body operation unit may interfere with the operation by the operator, or the bed and other devices may interfere with the universal cord, resulting in smooth movement to the light source device. There are problems such as the inability to route.
[0008]
The present invention has been made in view of the above points, and the object of the present invention is to smoothly operate the universal cord without interfering with the operation of the endoscope. Is to be able to be routed up to.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the first invention is a universal cord connection of an endoscope in which at least a universal cord that is detachably connected to a light source device is connected to a main body operation portion that is connected to an insertion portion. In the structure, a connecting cylinder portion formed in a cylindrical shape is provided at a rear end portion of the main body operation portion to connect the universal cord, and the universal cord includes a cord portion and the cord portion. The hard shell portion is connected to the main body operation portion, and the hard shell portion is formed of a curved cylindrical member, and the end portion on the connection side to the connection tube portion is turned to the connection tube portion. The hard outer body is connected in a movable manner, and the rigid outer body has a bent structure inclined at a predetermined angle between the connection side to the cord portion and the connection side of the main body operation portion, and the bending angle is maintained. From the connecting tube part It is an its features that it has a structure capable of changing the direction of inclination of the universal cord.
[0010]
The second invention is a universal cord connection structure for an endoscope in which a universal cord connected to at least a light source device is detachably connected to a main body operation portion provided to be connected to an insertion portion. A connecting tube portion formed in a cylindrical shape is provided at the rear end portion of the operation portion to connect the universal cord, and the universal cord connects the cord portion and the cord portion to the main body operation portion. The hard shell is composed of a straight cylindrical tube that connects two members having angles with each other, and one of the straight cylindrical tubes slides in the rotational direction on the connecting tube portion. The other straight cylindrical tube is a support ring that is connected and fixed to the cord portion, and the hard outer shell includes a connection side to the cord portion and a connection side of the main body operation portion. Between the predetermined angle Has a the bent structure inclined, while keeping the bending angle is obtained by a structure capable of changing the direction of inclination of the universal cord from said connection tube portion. In the first and second inventions, the hard outer portion can be held in a predetermined angle state by interposing the elastic ring between the hard outer portion and the connecting portion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on the drawings. First, the first embodiment FIGS. 1-3, also in Figure 4 shows the second embodiment, respectively. In here, these in each embodiment, although showing a joint portion of the structure from the main body operation portion of the endoscope into the universal cord, configurations other than the joint portion in the whole of the endoscope, FIG. 5 Is substantially the same as that shown in FIG. 1, or is configured as shown in FIG.
[0012]
Thus, in FIG. 1, 10 is a main body operation unit, 11 is a universal cord, and the universal cord 11 is connected to the rear end side of the main body operation unit 10. Various insertion members including at least the light guide 12 are inserted into the universal cord 11 from the main body operation unit 10 side. The illustrated one is configured as an electronic endoscope. Therefore, the signal cable 13 from the solid-state image sensor provided at the distal end of the insertion portion, the air supply tube 14 for cleaning the observation window, and the water supply tube 15 are provided. Are extended from the main body operation unit 10 into the universal cord 11.
[0013]
A universal cord 11 is connected to the main body operation unit 10. For this purpose, the rear end portion of the casing 10a of the main body operation unit 10, that is, the side opposite to the side where the insertion portion is continuously provided is opened, and the connecting tube portion 16 is connected to the opening portion by means such as screwing. Is provided. A threaded portion is provided on the outer peripheral surface of the connecting tube portion 16, and a stopper portion 16a made of an annular ridge is formed on the inner peripheral surface.
[0014]
On the other hand, the universal cord 11 has a flexible cord portion 17, and a bent cylindrical tube 18 is connected to a base end portion of the cord portion 17, and the bent cylindrical tube 18 in the cord portion 17 is also connected. A cover rubber 19 that exhibits a function of preventing the cord portion 17 from being bent is attached to the connecting portion to the connecting portion in a state of being fixed to a holding member 19a made of a hard member such as metal. The bent cylindrical tube 18 is connected to the connecting tube portion 16 on the main body operating portion 10 side, and is bent at a predetermined angle from a connecting portion to the connecting tube portion 16 provided in the extending direction of the main body operating portion 10. Accordingly, the entire universal cord 11 is connected to the main body operation unit 10 while being bent at a predetermined angle.
[0015]
A sliding ring 20 is screwed into the bent cylindrical tube 18 to form a hard outer shell, and the sliding ring 20 is inserted into the inner surface of the connecting tube portion 16 on the main body operation unit 10 side. The front end surface is in contact with the stopper portion 16a. In order to hold the bent cylindrical tube 18 with the sliding ring 20 screwed in this way so as not to deviate from the connection tube portion 16, the screw portion provided on the outer peripheral surface of the connection tube portion 16 is locked. The ring 21 is screwed. A locking ridge 21 a is provided at an intermediate position in the axial direction of the locking ring 21, and the locking ridge 21 a is a position in the sliding ring 20 that is close to a threaded portion to the bent cylindrical tube 18. It is in contact with the locking wall 20a formed in the above. As a result, the sliding ring 20 is held between the stopper portion 16a of the connecting tube portion 16 and the locking protrusion 21a of the locking ring 21, and as a result, the sliding ring 20 is axially moved. Is not movable and is movable in the rotational direction. As a result, the universal cord 11 is configured to be pivotally connected to the connection tube portion 16 of the main body operation unit 10.
[0016]
Here, in order to seal the connecting portion between the universal cord 11 and the main body operation unit 10, a seal ring 22 is interposed on the contact surface between the locking ring 21 and the outer peripheral surface of the bent cylindrical tube 18. In addition, the screw fitting portion between the locking ring 21 and the outer peripheral surface of the connecting tube portion 16 is filled with a sealing material. Further, an elastic ring 23 is also interposed between the outer peripheral surface of the sliding ring 20 and the inner peripheral surface of the connecting tube portion 16, and this elastic ring 23 exhibits a sealing function , and the sliding ring 20. Is for stably holding in this state when it is rotated by a predetermined angle with respect to the connecting tube portion 16. Accordingly, the elastic ring 23 is elastically deformed and is pressed against the outer surface of the sliding ring 20 and the inner surface of the connecting tube portion 16, and functions as a holding member that holds the sliding ring 20 in a predetermined rotational state by this elastic force. To do. Of course, when an external force greater than the elastic holding force by the elastic ring 23 is applied, the sliding ring 20 is slidably rotated with respect to the connecting tube portion 16.
[0017]
By the way, the light guide 12 and other insertion members are inserted from the main body operation unit 10 to the universal cord 11. Therefore, when the universal cord 11 is rotated once or more with respect to the main body operation unit 10, the insertion members are twisted. Therefore, it is necessary to regulate the rotation angle of the sliding ring 20 with respect to the connecting cylinder portion 16 so that excessive twisting is not applied to the insertion member. For this purpose, as shown in FIG. 2, the sliding ring 20 is provided with a restricting projection 20 b, and a circular portion is not provided in the vicinity of the end of the connecting tube portion 16 on the joining side with the locking ring 21. An arcuate notch 16b is formed. The arcuate notch 16b has an angle of at least 180 ° or more, preferably about 270 °.
[0018]
By constructing as described above, the operator inserts the trocar into the abdominal cavity at an arbitrary position on the body epidermis from an arbitrary angle and inserts the insertion portion into the abdominal cavity using the trocar as a guide means. When the main body operation unit 10 is gripped and operated, the curved cylindrical tube is used in relation to the position of the body including the hand of the operator and the light source device to which the universal cord 11 is connected. Without rotating the bending angle of the universal cord 11 set by the bending angle of the bent cylindrical tube 18 by rotating the shaft 18 around the axis with respect to the connecting tube portion 16 to the state shown in FIG. The pull-out direction of the universal cord 11 can be arbitrarily set with respect to the main body operation unit 10. This operation can be performed by gripping and rotating the bent cylindrical tube 18 or the like on the universal cord 11 side. The bent cylindrical tube 18 is a bent cylindrical tube, and the pulling direction of the cord portion 17 is inclined at a predetermined angle with respect to the axis of the main body operating portion 10, so that the sliding ring 20 slides on the connecting tube portion 16. As a result, the inclination direction of the cord portion 17 changes with respect to the axis of the main body operation portion 10.
[0019]
When the operating force applied to the bent cylindrical tube 18 is released in a state where the cord portion 17 of the universal cord 11 is oriented in a desired direction, an elastic ring 23 provided between the connecting cylinder portion 16 and the sliding ring 20. As a result, the universal cord 11 is stably held in the adjusted angular state unless a particularly large external force is applied. As a result, when the surgeon performs the operation, the universal cord 11 does not get in the way and can be operated smoothly, and when the main body operation unit 10 is fixed to a holder or the like, the universal cord 11, particularly The cord portion 17 does not interfere with other members and the like, and is smoothly routed without excessive bending force or the like acting on the light source device.
[0020]
In the first embodiment described above, the bent cylindrical tube is configured as a bent cylindrical tube in order to give a predetermined angle to pull out the universal cord from the main body operation unit. For example, FIG. In this way, the curved cylindrical tube can be configured to connect the two straight cylindrical tubes so as to have an angle with each other.
[0021]
Thus, in FIG. 4, the side surface portion on the rear side of the casing 110 a of the main body operation portion 110 is opened, and the cylinder body 100 is led out from the opening portion, and the connection cylinder portion 116 is screwed into the cylinder body 100. They are connected by means such as a stopper. A screw ring 101 is attached to the opening of the casing 110a so as to surround the cylindrical body 100. The screw ring 101 has a substantially truncated cone shape, and has the largest diameter. The thread part is formed in the outer peripheral surface of the. On the other hand, the universal cord 111 has a cover rubber 119 attached to the base end portion of the cord portion 117 and a support ring 118 connected thereto. The shape retaining member 119 a provided on the inner surface of the cover rubber 119 and the support ring 118 are connected and fixed to the sliding ring 120. Here, the support ring 118 and the sliding ring 120 are connected at a predetermined angle, and the support ring 118 and the sliding ring 120 are hard outer portions in which an insertion member is inserted.
[0022]
The sliding ring 120 is fitted to the outer peripheral surface of the connection tube portion 116, and its end surface is in contact with a stepped portion 116 a formed in the connection tube portion 116. Further, a cap nut 121 is screwed onto the outer peripheral surface of the screw ring 101, and the cap nut 121 is engaged with a stepped portion to the large diameter portion 120a formed on the outer peripheral surface of the sliding ring 120. ing. As a result, the sliding ring 120 as a hard outer portion constituting the base end portion of the universal cord 111 has its distal end surface in contact with the step 116a of the connecting tube portion 116, and the step portion in the large diameter portion 120a is a bag. The universal cord 111 is held in a state where it is connected to the main body operation unit 110 by being pulled by the nut 121 toward the connection tube portion 116. In addition, the sliding ring 120 can be rotated relative to the connecting tube portion 116 and the cap nut 121. Further, an elastic ring 123 is attached to the outer peripheral surface of the large-diameter portion 120 a in the sliding ring 120, and the sliding ring 120 can be held at an arbitrary rotational position with respect to the connecting tube portion 116 by the elastic ring 123. It becomes like this. As a result, the universal cord 111 can be stably held in a state where the bending angle between the support ring 118 and the sliding ring 120 is maintained and the universal cord 111 is oriented in an arbitrary direction with respect to the main body operation unit 110. ing. Further, the same restricting protrusion 116b as shown in FIG. 2 is formed in the connecting tube portion 116, and the arc-shaped notch 120b having a predetermined arc angle is formed in the sliding ring 120. In FIG. 4, reference numeral 102 denotes an angle knob provided in the main body operation unit 110. When the angle portion is provided in the insertion portion, the angle portion can be bent by the angle knob 102.
[0023]
Also with the above configuration, the drawing direction of the cord portion 117 of the universal cord 111 with respect to the axis line of the main body operation unit 110 is adjusted so as to be directed from the state of the solid line in FIG. Will be able to. As a result, when the surgeon performs the operation, the universal cord 111, particularly the cord portion 117, does not get in the way and smooth operation is possible, and when the main body operation portion 110 is fixed to a holder or the like. The universal cord 111 does not interfere with other members or the like, and an excessive bending force or the like does not act on the light source device.
[0024]
Note that the endoscope of the present invention can be applied to an endoscope that is inserted into a body cavity or the like from an arbitrary direction at an arbitrary position, and performs an inspection or the like in the body cavity, and is not necessarily limited to a laparoscope. It is not a thing.
[0025]
【The invention's effect】
As described above, according to the present invention, the hard shell portion is provided at the end of the universal cord, the hard shell portion is connected to the connection portion of the main body operation portion in a state bent at a predetermined angle , and the hard shell portion is connected. Since the part is connected to the connection part so that the direction can be adjusted, the universal cord can be smoothly and smoothly routed to the light source device without interfering with the operation of the endoscope. There are effects such as.
[Brief description of the drawings]
FIG. 1 is a cross-sectional front view of an essential part of a connecting portion between a main body operation unit and a universal cord, showing a first embodiment of the present invention.
2 is a cross-sectional view taken along the line XX of FIG. 1 with an internal insertion member omitted.
FIG. 3 is an operation explanatory diagram of FIG. 1;
FIG. 4 is a cross-sectional front view of a main part of a connecting portion between a main body operation unit and a universal cord, showing a second embodiment of the present invention.
FIG. 5 is an explanatory view showing a state in which a laparoscope is inserted into a body cavity as an example of an endoscope.
[Explanation of symbols]
10, 110 Main body operation part 11, 111 Universal cord 16, 116 Connection cylinder part 17, 117 Code part 18 Bending cylindrical tube 20, 120 Sliding ring 21 Locking ring 23, 123 Elastic ring 118 Support ring

Claims (3)

A universal cord connection structure of an endoscope for connecting a universal cord that is detachably connected to at least a light source device to a main body operation unit that is connected to an insertion unit,
A connecting tube portion formed in a cylindrical shape is provided at the rear end portion of the main body operation portion in order to connect the universal cord,
The universal cord is composed of a cord portion and a hard outer portion for connecting the cord portion to the main body operation portion,
The hard shell portion is composed of a curved cylindrical member, and an end portion on the connection side to the connection tube portion is rotatably connected to the connection tube portion,
The hard outer body has a bent structure that is inclined by a predetermined angle between the connection side to the cord portion and the connection side of the main body operation portion, and the connection cylinder portion is maintained in a state where this bending angle is maintained. The universal cord connecting structure for an endoscope, characterized in that the direction of the inclination of the universal cord from can be changed. A universal cord connection structure of an endoscope for connecting a universal cord that is detachably connected to at least a light source device to a main body operation unit that is connected to an insertion unit,
A connecting tube portion formed in a cylindrical shape is provided at the rear end portion of the main body operation portion in order to connect the universal cord,
The universal cord is composed of a cord portion and a hard outer portion for connecting the cord portion to the main body operation portion,
The hard shell is composed of a straight cylindrical tube in which two members having an angle with each other are connected, and one of the straight cylindrical tubes is a sliding ring that is connected to the connecting tube portion so as to be slidable in the rotation direction, and the other The straight cylindrical tube has a support ring connected and fixed to the cord part,
The hard outer body has a bent structure that is inclined by a predetermined angle between the connection side to the cord portion and the connection side of the main body operation portion, and the connection cylinder portion is maintained in a state where this bending angle is maintained. Can change the direction of inclination of the universal cord from
Endoscope universal cord connection structure characterized by having a configuration. Between the connecting portion and the rigid outer portion has claim 1 or claim 2, characterized in that a structure of interposing the elastic ring to hold the state of adjusting the inclination direction of the rigid outer shell Universal cord connection structure of the described endoscope.

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