Endoscopic device, interchangeable insertion tube mechanism and catheter used therein

Abstract

To provide an endoscope device whose insertion tube mechanism is replaceable.SOLUTION: An endoscope device includes a handle mechanism 3 and a replaceable insertion tube mechanism 4. The handle mechanism 3 includes a handle unit 31, a connection unit 32 having a first connection end part 322 away from the handle unit 31, and a signal connector 35 connected to the handle unit 31 so as to transmit a signal. The replaceable insertion tube mechanism 4 includes an insertion tube unit 41 having a second connection end part 412 and an insertion end part 413 and an imaging unit 42 attached to the insertion tube unit 41. The imaging unit 42 includes a signal terminal 422 exposed from the second connection end part 412. The second connection end part 412 of the insertion tube unit 41 is coaxially combined with the first connection end part 322 detachably so that the signal terminal 422 is detachably connected with the signal connector 35 so as to transmit a signal.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an endoscope device, and particularly to an endoscope device in which an insertion tube mechanism can be replaced.

Background Art

[0002] When inserting a catheter such as a nasogastric tube and a feeding tube, since the tube body of such a catheter is too soft and easily bends, a wire for providing a supporting force is inserted in advance when manufacturing the catheter. And during the insertion operation, in order to provide a visual guide, the catheter is inserted together with the endoscope in a state parallel to the endoscope.

[0003] However, the method of inserting the catheter in parallel with the endoscope has a structure in which two tube bodies are combined, so the structure becomes thick. Therefore, the patient is likely to feel pain during the insertion process, and there is a possibility of damaging the mucosa of the body cavity.

[0004] In a conventional endoscope device such as Patent Document 1, the insertion tube for insertion into the body has a fixed tube diameter and the insertion tube cannot be replaced. Therefore, it is necessary to perform the insertion operation using an endoscope device equipped with an insertion tube having an appropriate tube diameter according to the patient's body type. Therefore, it is necessary to prepare a plurality of endoscope devices each having an insertion tube of a different size, which greatly increases the equipment cost of the medical institution.

[0005] In addition, a urinary catheter generally uses a material that is relatively hard and difficult to bend in order to be smoothly inserted and pass through the prostate during the insertion operation.

[0006] However, in many cases, the urinary catheter is inserted without grasping the degree of hypertrophy of the patient's prostate. In such a case, the tip of the urinary catheter often collides with the prostate, causing very strong pain to the patient.

[0007] Furthermore, if the insertion of a urinary catheter is not smooth and does not pass through the prostate area, the medical professional (practitioner) will remove the catheter and try inserting other thinner catheters until the first one is successfully placed. This method of blindly inserting urinary catheters is very uncomfortable for the patient and also tends to result in the waste of catheters and other instruments. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] International Publication No. 2006 / 088058 [Overview of the project] [Problems that the invention aims to solve]

[0009] The object of the present invention is to provide an endoscope, an insertion tube, and a catheter that solve at least one of the problems of the prior art. [Means for solving the problem]

[0010] The present invention is an endoscopic device suitable for insertion into a catheter having a connecting portion and a tubular body portion. It includes a handle mechanism and a replaceable insertion tube mechanism, The handle mechanism includes a handle unit, a connecting unit connected to the handle unit and having a first connecting end separated from the handle unit, and a signal connector connected to the handle unit in a signal-transmitting manner and exposed from the first connecting end. The connecting unit includes a connecting pipe on which the first connecting end is formed, and a first threaded annular body attached to the outside of the first connecting end so as to be movable along the longitudinal direction of the connecting pipe, The interchangeable insertion tube mechanism includes an insertion tube unit having a second connecting end and an insertion end which is the opposite end of the second connecting end, and an imaging unit attached to the insertion tube unit. The insertion tube unit includes an insertion tube on which the second connecting end and the insertion end are formed. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The imaging unit comprises an imaging device attached to the insertion end, and a signal terminal connected to the imaging device in a signal-transmitting manner and exposed from the second connecting end. The second connecting end of the insertion tube unit is removably coaxially coupled to the first connecting end such that the signal terminal is removably connected to the signal connector in a signal-transmitting manner. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The first threaded annular body is threaded to be removably fitted around the second connecting end, and the ends of the first connecting end and the second connecting end are connected and fixed together. The present invention provides an endoscope device characterized in that the first screwed annular body has a first annular portion screwed onto the second connecting end and a second annular portion screwed onto the connecting portion.

[0011] Furthermore, the present invention is an endoscopic device suitable for insertion into a catheter having a connecting portion and a tubular body portion. It includes a handle mechanism and a replaceable insertion tube mechanism, The handle mechanism includes a handle unit, a connecting unit connected to the handle unit and having a first connecting end separated from the handle unit, and a signal connector connected to the handle unit in a signal-transmitting manner and exposed from the first connecting end. The connection unit includes a connecting pipe on which the first connecting end is formed. The interchangeable insertion tube mechanism includes an insertion tube unit and an imaging unit attached to the insertion tube unit. The insertion tube unit includes an insertion tube having a second connecting end and an insertion end which is the opposite end of the second connecting end, and a third threaded annular body attached to the outside of the second connecting end so as to be movable along the longitudinal direction of the insertion tube, The imaging unit comprises an imaging device attached to the insertion end, and a signal terminal connected to the imaging device in a signal-transmitting manner and exposed from the second connecting end. The second connecting end is detachably coaxially coupled to the first connecting end such that the signal terminal is detachably connected to the signal connector in a signal-transmitting manner. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The present invention provides an endoscope device characterized in that the third screwed annular body has a third annular portion that is fitted around the second connecting end so as to move toward the insertion end without separating from the second connecting end, and a fourth annular portion that is screwed to fit around the connecting portion.

[0012] Furthermore, the present invention is an endoscopic device suitable for insertion into a catheter having a connecting portion and a tubular body portion. It includes a handle mechanism and a replaceable insertion tube mechanism, The handle mechanism includes a handle unit, a connecting unit connected to the handle unit and having a first connecting end separated from the handle unit, and a signal connector connected to the handle unit in a signal-transmitting manner and exposed from the first connecting end. The connecting unit includes a connecting pipe on which the first connecting end is formed, and a first threaded annular body attached to the outside of the first connecting end so as to be movable along the longitudinal direction of the connecting pipe, The interchangeable insertion tube mechanism includes an insertion tube unit having a second connecting end and an insertion end which is the opposite end of the second connecting end, and an imaging unit attached to the insertion tube unit. The imaging unit comprises an imaging device attached to the insertion end, and a signal terminal connected to the imaging device in a signal-transmitting manner and exposed from the second connecting end. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The insertion tube unit includes an insertion tube on which the second connecting end and the insertion end are formed, and a third threaded annular body attached to the outside of the second connecting end so as to be movable along the longitudinal direction of the insertion tube, The second connecting end is detachably coaxially coupled to the first connecting end such that the signal terminal is detachably connected to the signal connector in a signal-transmitting manner. The first threaded annular body is threaded to be removably fitted around the second connecting end, and the ends of the first connecting end and the second connecting end are connected and fixed together. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The present invention provides an endoscope device characterized in that the third screwed annular body has a third annular portion that is fitted around the second connecting end so as to move toward the insertion end without separating from the second connecting end, and a fourth annular portion that is screwed to fit around the connecting portion.

[0013] Furthermore, the present invention is an endoscopic device suitable for insertion into a catheter having a connecting portion and a tubular body portion. It includes a handle mechanism and a replaceable insertion tube mechanism, The handle mechanism includes a handle unit, a connection unit connected to the handle unit and having a first connection end away from the handle unit, and a signal connector signal-transmissively connected to the handle unit and exposed from the first connection end. The connection unit includes a connecting pipe where the first connection end is formed. The replaceable insertion tube mechanism includes an insertion tube unit having a second connection end and an insertion end which is the opposite end of the second connection end, and a photographing unit attached to the insertion tube unit. The photographing unit has a camera attached to the insertion end, and a signal terminal signal-transmissively connected to the camera and exposed from the second connection end. The camera is configured to be able to photograph in the direction towards the tip of the tube body portion of the catheter. The insertion tube unit includes an insertion tube where the second connection end and the insertion end are formed, a second screwed annular body attached to the outside of the second connection end so as to be movable along the length direction of the insertion tube, and a third screwed annular body attached to the outside of the second connection end so as to be movable along the length direction of the insertion tube. The second connection end is removably coaxially combined with the first connection end such that the signal terminal is removably signal-transmissively connected to the signal connector. The second screwed annular body is screwed to be removably looped around the first connection end, and the tips of the first connection end and the second connection end are connected and fixed. The insertion tube is configured to be able to be inserted into the tube body portion of the catheter such that the insertion end is at the opposite end to the connection portion of the catheter. The present invention provides an endoscope device characterized in that the third screwed annular body has a third annular portion that is fitted around the second connecting end so as to move toward the insertion end without separating from the second connecting end, and a fourth annular portion that is screwed to fit around the connecting portion.

[0014] Furthermore, the present invention is a replaceable insertion tube mechanism suitable for attachment to the handle mechanism of an endoscope device and suitable for insertion into a catheter having a connecting portion and a tube body portion. Including an insertion tube unit and an imaging unit, The insertion tube unit includes an insertion tube and a third threaded annular body attached to the outside of the second connecting end so as to be movable along the longitudinal direction of the insertion tube, The insertion tube has a second connecting end that is removably and coaxially connected to the handle mechanism, and an insertion end that is the opposite end of the second connecting end. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The third threaded annular body has a third annular portion that is fitted around the second connecting end so as to move toward the insertion end without separating from the second connecting end, and a fourth annular portion that is threaded to fit around the connecting portion. The imaging unit is attached to the insertion tube unit and includes an imaging device attached to the insertion end, and a signal terminal that is connected to the imaging device in a signal-transmitting manner and is exposed from the second connecting end. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The present invention provides an interchangeable insertion tube mechanism, characterized in that the signal terminal is configured such that when the second connecting end is combined with the handle mechanism, it can be connected to the handle mechanism in a signal-transmitting manner.

[0015] Furthermore, the present invention relates to a catheter suitable for attachment to the above-mentioned endoscopic device equipped with the first threaded annular body, Having a connecting part and a pipe body that are formed integrally, The connecting portion is configured such that the insertion end of the insertion tube is inserted into it, surrounding the insertion tube, and that it moves along the insertion tube toward the connecting pipe, and is positioned and restricted by contacting the first annular portion of the first threaded annular body or the second connecting end of the insertion tube, and can be threaded by being fitted around the second annular portion of the first threaded annular body. The present invention provides a catheter characterized in that the main body of the tube is configured to accommodate the insertion end inserted into the connection portion, and the end opposite to the connection portion has a tip opening for the camera to take pictures of the outside.

[0016] Furthermore, the present invention relates to a catheter suitable for attachment to the above-mentioned endoscopic device equipped with a third threaded annular body. Having a connecting part and a pipe body that are formed integrally, The connecting portion is configured such that the insertion end of the insertion tube is inserted into it, surrounding the insertion tube, and that it moves along the insertion tube toward the connecting pipe, and is positioned and restricted by contacting the third annular portion of the third threaded annular body or the second connecting end of the insertion tube, and can be threaded by being fitted around the fourth annular portion of the third threaded annular body. The present invention provides a catheter characterized in that the main body of the tube is configured to accommodate the insertion end inserted into the connection portion, and the end opposite to the connection portion has a tip opening for the camera to take pictures of the outside. [Effects of the Invention]

[0017] The handle mechanism and the interchangeable insertion tube mechanism described above are designed to be detachably combined, allowing healthcare professionals to use and install interchangeable insertion tubes of the required outer diameter and length as needed, significantly reducing equipment costs for medical institutions.

[0018] Furthermore, since the first threaded annular body of the handle mechanism or the third threaded annular body of the interchangeable insertion tube mechanism can be threaded to fit around the catheter connection, the catheter can be stably attached and connected to the endoscope device, and can be synchronized with the interchangeable insertion tube mechanism, thereby increasing the success rate of insertion and placement. [Brief explanation of the drawing]

[0019] [Figure 1] This is a partial front view showing the structure of the first embodiment of the endoscopic device of the present invention. [Figure 2] This is an exploded view of a partial component of the first embodiment described above. [Figure 3] This is a partial perspective view showing the interchangeable insertion tube mechanism of the first embodiment described above. [Figure 4] This is an exploded view of a partial component showing the combined structure of the handle mechanism and the interchangeable insertion tube mechanism of the first embodiment described above. [Figure 5] This is a partial cross-sectional view showing the combined structure of the handle mechanism and the interchangeable insertion tube mechanism of the first embodiment described above. [Figure 6] This is a partial exploded view showing a situation in which a different interchangeable insertion tube mechanism of the first embodiment described above is used. [Figure 7] This is an exploded view of a partial component showing a combined structure of a handle mechanism and a replaceable insertion tube mechanism in another embodiment of the first embodiment described above. [Figure 8] This is a partial exploded view showing the combined structure of the handle mechanism and the interchangeable insertion tube mechanism of a second embodiment of the endoscope device of the present invention. [Figure 9] This is a partial cross-sectional view showing the combined structure of the handle mechanism and the interchangeable insertion tube mechanism of the second embodiment described above. [Figure 10] This is a partial cross-sectional view showing a combined structure of a handle mechanism and a replaceable insertion tube mechanism in another embodiment of the second embodiment described above. [Figure 11] This is an exploded view of a partial component showing the structure of a third embodiment of the endoscopic device of the present invention. [Figure 12] This is a partial cross-sectional view showing the structure of the third embodiment described above. [Figure 13] This is a partial cross-sectional view showing the structure of another embodiment of the third embodiment described above. [Figure 14] This is a partial cross-sectional view showing a fourth embodiment of the endoscopic device of the present invention in use in conjunction with a catheter. [Figure 15] This is an exploded view of a partial component showing the structure of the fourth embodiment described above. [Figure 16] This is a partial cross-sectional view showing the structure of another embodiment of the fourth embodiment described above. [Figure 17] This is a partial cross-sectional view showing a fifth embodiment of the endoscopic device of the present invention in use with a catheter. [Figure 18] This is a partial cross-sectional view showing the structure of another embodiment of the fifth embodiment described above. [Modes for carrying out the invention]

[0020] To more clearly illustrate the object, technical means, and advantages of the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. It will be clear that the embodiments described are some, and not all, embodiments of the present invention. Typically, the components of the embodiments of the present invention depicted and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the detailed description of the embodiments of the present invention provided below in the accompanying drawings does not constitute any limitation on the scope of protection of the present invention, but merely illustrates selected embodiments of the present invention.

[0021] Before describing the present invention in more detail, it should be noted that, where appropriate, reference numerals or the end portion of reference numerals are repeated between figures to indicate corresponding or similar elements, which may optionally have similar characteristics.

[0022] In the description of this invention, terms indicating directions and positional relationships such as "up," "down," "inside," "outside," "left," "right," "front," "back," "top," and "bottom" are used for the sake of simpler and clearer explanation, based on the directions and positional relationships shown in the drawings, or the directions and positional relationships that are habitually used when using the product of this invention. They do not teach or suggest that the corresponding apparatus or device has a specific direction, structure, or operation in a specific direction, and are not limitations to this invention.

[0023] Furthermore, in the description of this invention, terms such as "first," "second," etc., are used solely for the purpose of distinction and do not imply or suggest relative importance.

[0024] A first embodiment of the endoscopic device 200 of the present invention, as shown in Figures 1 and 2, can be combined to communicate with a water supply device (not shown) and a suction device (not shown), and can be connected to an image display device (not shown) in a signal transmission manner, and is suitable for insertion into a catheter (not shown), thereby assisting in the insertion and placement of the catheter.

[0025] Examples of such catheters include, but are not limited to, urinary catheters and feeding tubes.

[0026] The endoscope device 200 includes a handle mechanism 3 that can be combined with the water supply equipment, the suction equipment and the image display equipment, and a replaceable insertion tube mechanism 4 for insertion into the body, which is detachably combined with the handle mechanism 3.

[0027] The handle mechanism 3 includes a handle unit 31, a connecting unit 32 extending outward from the handle unit 31, a first connecting pipe 33 attached to the handle unit 31 and the connecting unit 32 so as to communicate with the handle unit 31 and the connecting unit 32, a second connecting pipe 34 attached to the handle unit 31 and the connecting unit 32 so as to communicate with the handle unit 31 and the connecting unit 32, and a signal connector 35 installed on the connecting unit 32 and connected to the handle unit 31 so as to be able to transmit signals.

[0028] The handle unit 31 includes a handle body 311, a water supply valve 312 attached to the handle body 311, a suction valve 313 attached to the handle body 311, and a communication module 314 attached to the handle body 311.

[0029] The water supply valve 312 is configured to be combined with the second connecting pipe 34 so as to be able to communicate with the second connecting pipe 34, and can also be combined with the water supply equipment so as to be able to communicate with the water supply equipment, and is configured to be controlled to open and connect the second connecting pipe 34 and the water supply equipment.

[0030] The suction valve 313 is configured to be combined with the first connecting pipe 33 so as to be able to communicate with the first connecting pipe 33, and can also be combined with the suction equipment so as to be able to communicate with the suction equipment, and is configured to be controlled to open and connect the first connecting pipe 33 and the suction equipment.

[0031] The communication module 314 is connected to the signal connector 35 in a signal-transmitting manner and can be connected to the image display equipment in a signal-transmitting manner, and is configured to enable a signal-transmitting connection between the signal connector 35 and the image display equipment.

[0032] In this embodiment, the communication module 314 shown in Figures 1 and 2 is a communication cable that transmits signals via a wired connection. However, in other embodiments, the communication module 314 can be one that communicates wirelessly with the image display equipment, such as a Bluetooth (registered trademark) module, but is not limited to this.

[0033] In this first embodiment, the connecting unit 32 includes a connecting pipe 321 that extends outward from the handle body 311 so as to be connected to the handle unit 31, and has a first connecting end 322 formed thereon that is separated from the handle body 311.

[0034] The end face of the first connecting end 322 is formed with a recessed connecting groove 323 into which the replaceable insertion tube mechanism 4 can be inserted.

[0035] As shown in Figures 2, 4, and 5, the first connecting pipe 33 extends along the connecting pipe 321 and is installed inside the connecting pipe 321. The first connecting pipe 33 also has a first connecting pipe connector 331 that is exposed in the connecting tank 323 while communicating with the connecting tank 323 in the same axial direction.

[0036] The second connecting pipe 34 extends along the connecting pipe 321 and is installed inside the connecting pipe 321. Furthermore, the second connecting pipe 34 has a second connecting pipe connector 341 that is exposed in the connecting tank 323 while communicating with the connecting tank 323 in the same axial direction.

[0037] The signal connector 35 is exposed at the end face of the first connecting end 322 of the connecting pipe 321.

[0038] In this first embodiment, the signal connector 35 is of socket type and is exposed in the connecting groove 323.

[0039] As shown in Figures 3, 4, and 5, the interchangeable insertion tube mechanism 4 is detachably attached to the first connecting end 322 of the connecting pipe 321. The interchangeable insertion tube mechanism 4 also includes an insertion tube unit 41, an imaging unit 42 attached to the insertion tube unit 41, a first connecting pipe 43 installed inside the insertion tube unit 41 so as to pass through the insertion tube unit 41, and a second connecting pipe 44 installed inside the insertion tube unit 41 so as to pass through the insertion tube unit 41.

[0040] In this first embodiment, the insertion tube unit 41 includes an insertion tube 411 that is elongated so as to bend and deform. The insertion tube 411 has a second connecting end 412, an insertion end 413 which is the opposite end of the second connecting end 412, and a tube body portion 414 that connects the second connecting end 412 and the insertion end 413. That is, the insertion tube 411 has a second connecting end 412 and an insertion end 413 which are opposite ends to each other.

[0041] The outer diameter of the second connecting end 412 is smaller than the outer diameter of the tube body 414.

[0042] The first connecting pipe 43 extends along the insertion tube 411 so as to penetrate the second connecting end 412 and the insertion end 413, and is installed inside the insertion tube 411. The first connecting pipe 43 has a first opening 430 exposed at the end face of the insertion end 413, and is detachably combined with the first connecting pipe connector 331, and has a first connecting pipe connector 431 protruding from the end face of the second connecting end 412.

[0043] The second connecting pipe 44 extends along the insertion tube 411 so as to penetrate the second connecting end 412 and the insertion end 413, and is installed inside the insertion tube 411. The second connecting pipe 44 has a second opening 440 exposed at the end face of the insertion end 413, and is detachably combined with the second connecting pipe connector 341, and has a second connecting pipe connector 441 protruding from the end face of the second connecting end 412.

[0044] The imaging unit 42 is attached to the insertion end 413. The imaging unit 42 also has an imaging device 421 that is exposed at the end face of the insertion end 413 and capable of taking images, and a signal terminal 422 that protrudes from the end face of the second connecting end 412 and is connected to the imaging device 421 in a manner that enables signal transmission.

[0045] In this first embodiment, the camera 421 may, for example, use a charge-coupled device (CCD), but is not limited thereto.

[0046] The second connecting end 412 is coaxially connected to the first connecting end 322 so that the signal terminal 422 is detachably connected to the signal connector 35 in a signal-transmitting manner.

[0047] As shown in Figures 2, 4, and 5, when combining the handle mechanism 3 and the interchangeable insertion tube mechanism 4, the second connecting end 412 of the insertion tube 411 is coaxially inserted into the connecting groove 323 of the connecting tube 321, thereby inserting the first connecting tube connector 431 of the first connecting tube 43, the second connecting tube connector 441 of the second connecting tube 44, and the signal terminal 422 into the connecting groove 323. Furthermore, the first connecting tube connector 431 is inserted into the first connecting tube connector 331 so as to ensure airtight communication with the first connecting tube connector 331, the second connecting tube connector 441 is inserted into the second connecting tube connector 341 so as to ensure airtight communication with the second connecting tube connector 341, and the signal terminal 422 is inserted into the signal connector 35 so as to be electrically connected to the signal connector 35, thereby completing the combination.

[0048] As shown in Figures 1 and 6, during implementation, insertion tubes 411 having tube bodies 414 and insertion ends 413 with different outer diameters and lengths can be manufactured according to the size of each catheter, such as its diameter and length. When replacing with an insertion tube 411 having a different diameter or length, the replaceable insertion tube mechanism 4 originally inserted into the connecting tube 321 can be removed, and then replaced with a replaceable insertion tube mechanism 4 having the required outer diameter and length, making it highly convenient.

[0049] When using the endoscopic device 200 of the present invention to guide the insertion of catheters such as nasogastric tubes, nasojejunal tubes, nasogastric feeding tubes, and naso-enteric tubes, in situations where a guide wire (not shown) is not installed on the catheter, an insertion tube unit 41 equipped with an insertion tube 411 of an appropriate size (outer diameter and length) based on the inner diameter of the catheter being used is attached to the handle mechanism 3, and the insertion tube 411 is inserted into the catheter. This improves the support force of the catheter with the insertion tube 411, making it easier to advance the catheter during insertion. Furthermore, the camera 421 installed at the insertion end 413 of the insertion tube 411 can approach the opening at the tip of the catheter and take images in the direction the tip is heading, that is, it can take images in the direction of the catheter's advancement.

[0050] Images captured by the camera 421 are transmitted to the image display equipment, which is connected to the communication module 314 via signal terminals 422 and signal connector 35, which are mutually connected in a signal transmission manner.

[0051] Therefore, medical professionals can immediately obtain an image of the body cavity in front of the catheter during the catheter insertion process, allowing for easy adjustment of the direction of advancement and observation of the tissues in the body cavity.

[0052] Furthermore, when suction is performed on the body cavity, for example when suctioning liquid or gas, the suction valve 313 can be controlled to open, and the suction equipment can generate a negative pressure suction force in the correspondingly communicating first communication pipe 33 and first connecting pipe 43, thereby enabling suction work on liquid or gas in the body cavity in front of the insertion end 413.

[0053] Furthermore, when cleaning the body cavity during the insertion procedure, the water supply valve 312 can be controlled to open, allowing water or other liquid supplied from the water supply equipment to be ejected forward of the insertion end 413 via the correspondingly communicating second communication pipe 34 and second connecting pipe 44.

[0054] By inserting the insertion tube 411 of the endoscope device 200 of the present invention into a catheter, and then inserting or leaving the catheter in place, the drawback of conventional endoscopes being inserted in parallel outside the catheter can be eliminated.

[0055] Similarly, when inserting a urinary catheter, an insertion tube unit 41 equipped with an insertion tube 411 having an appropriate outer diameter and length based on the inner diameter of the urinary catheter to be used is attached to the handle mechanism 3, and the insertion tube 411 is inserted into the urinary catheter. As a result, the camera 421 installed on the insertion tube 411 can approach the opening at the tip of the urinary catheter and take images in the direction of the urinary catheter's forward movement.

[0056] This method allows for immediate assessment and monitoring of prostate enlargement during the insertion of a urinary catheter, enabling healthcare professionals to directly replace the catheter with one of the appropriate size.

[0057] Furthermore, by inserting the endoscope device 200 of the present invention into the urinary catheter using the insertion tube 411, the support force of the urinary catheter can be improved by the insertion tube 411. This allows the tubular body of the urinary catheter to be manufactured from a softer material, significantly improving the discomfort caused by the hardness of conventional urinary catheter materials.

[0058] As shown in Figures 3, 4, and 5, in this first embodiment, the connecting groove 323 is formed in the first connecting end 322 so as to be recessed, allowing the first connecting end 322 and the second connecting end 412 to be joined together so as to be inserted into each other.

[0059] However, in another embodiment, the second connecting end 412 is formed with a recessed connecting groove, and the first connecting end 322 is inserted into the connecting groove of the second connecting end 412 to be combined.

[0060] Furthermore, in this first embodiment, the first connecting pipe connector 331, the second connecting pipe connector 341, and the signal connector 35 are embedded in the first connecting end 322 and exposed in the connecting groove 323, and the first connecting pipe connector 431, the second connecting pipe connector 441, and the signal terminal 422 protrude from the end face of the second connecting end 412. Therefore, when the first connecting end 322 and the second connecting end 412 are connected to each other, the first connecting pipe connector 431 is inserted into the first connecting pipe connector 331, the second connecting pipe connector 441 is inserted into the second connecting pipe connector 341, and the signal terminal 422 is inserted into the signal connector 35.

[0061] However, in another embodiment, the first communication pipe connector 331, the second communication pipe connector 341, and the signal connector 35 may be configured to protrude from the connecting groove 323 or from the end face of the first connecting end 322. Accordingly, the first connecting pipe connector 431, the second connecting pipe connector 441, and the signal terminal 422 may be configured to be embedded in the second connecting end 412 and exposed at the end face of the second connecting end 412 or in the connecting groove. With this configuration, when the first connecting end 322 and the second connecting end 412 are inserted into each other and assembled, the first communication pipe connector 331 is inserted into the first connecting pipe connector 431, the second communication pipe connector 341 is inserted into the second connecting pipe connector 441, and the signal connector 35 is inserted into the signal terminal 422, thereby enabling water supply, suction, and signal transmission.

[0062] As shown in Figure 7, in another embodiment of this first embodiment, the signal connector 35 and the signal terminal 422 are not interlocked, but are both planar in shape, and when the first connecting end 322 and the second connecting end 412 are connected, the signal connector 35 and the signal terminal 422 come into contact with each other so as to be electrically connected and transmit electricity and signals.

[0063] Furthermore, there are many ways to combine the first connecting end 322 and the second connecting end 412, and there are also many ways to combine the first connecting pipe connector 331 and the first connecting pipe connector 431 to communicate, the second connecting pipe connector 341 and the second connecting pipe connector 441 to communicate, and the signal connector 35 and the signal terminal 422 to enable signal transmission, so when implementing, the invention is not limited to the embodiments described above.

[0064] The second embodiment of the endoscope device 200 of the present invention is similar to the first embodiment, except for the structure of combining the connection unit 32 and the insertion tube unit 41, as shown in Figures 8 and 9. The differences between the first and second embodiments will be explained below.

[0065] In this second embodiment, the connecting unit 32 further has a first threaded annular body 325 mounted on the outside of the first connecting end 322 so as to be movable along the longitudinal direction of the connecting pipe 321, specifically the first connecting end 322, the first connecting end 322 does not have a connecting groove 323 formed therein, and the connecting pipe 321 further has a contact annular portion 324 that protrudes radially from the outer circumferential surface of the first connecting end 322.

[0066] The first threaded annular body 325 is threaded to be removably fitted around the second connecting end 412, and the ends of the first connecting end 322 and the second connecting end 412 are connected and fixed together.

[0067] In other words, the first threaded annular body 325 is threaded to be removably attached to the second connecting end 412 such that the tip of the first connecting end 322 and the tip of the second connecting end 412 are connected to each other and fixed in place.

[0068] In this second embodiment, the first threaded annular body 325 has a position-restricting annular portion 326 that is configured to be in position-restricted by contacting the abutment annular portion 324 when moved toward the tip of the first connecting end 322 together with the first annular portion 327, which will be described later, and a first annular portion 327 that extends coaxially from the position-restricting annular portion 326 beyond the abutment annular portion 324 and protrudes from the tip of the first connecting end 322.

[0069] The first connecting pipe connector 331, the second connecting pipe connector 341, and the signal connector 35 are exposed from the end face of the first connecting end 322.

[0070] A thread 415 is formed on the outer circumferential surface of the second connecting end 412 of the insertion tube 411.

[0071] When combining the handle mechanism 3 and the interchangeable insertion tube mechanism 4, the first connecting pipe connector 431, the second connecting pipe connector 441, and the signal terminal 422 protruding from the second connecting end 412 are inserted into the first communication pipe connector 331, the second communication pipe connector 341, and the signal connector 35, respectively. The ends of the first connecting end 322 and the second connecting end 412 then come into contact with each other. The first annular portion 327 of the first screw annular body 325 is then screwed into the threads 415 of the second connecting end 412 until the position-restricting annular portion 326 comes into contact with the contact annular portion 324 and is restricted in position. This completes the combination.

[0072] When replacing it with another interchangeable insertion tube mechanism 4, the interchangeable insertion tube mechanism 4 can be removed from the handle mechanism 3 simply by rotating the first threaded annular body 325 to detach it from the second connecting end 412.

[0073] As shown in Figures 8 and 9, in this second embodiment, the first threaded annular body 325 is fitted around the connecting pipe 321, and threads 415 are formed on the outside of the second connecting end 412 of the insertion tube 411 for screwing the first threaded annular body 325.

[0074] However, in other embodiments, the connection structure between the first threaded annular body 325 and the threads 415 is interchangeable, that is, as shown in Figure 10, the threads 329 are formed on the outer surface of the first connecting end 322 of the connecting pipe 321 without installing the first threaded annular body 325 on the connecting unit 32, and the insertion tube unit 41 may further include a second threaded annular body 416 that is fitted around the second connecting end 412 of the insertion tube 411 so as to be movable along the longitudinal direction of the insertion tube 411, and is configured to be screwed in so as to be removable around the threads 329 of the first connecting end 322. This design also allows the first connecting end 322 of the connecting pipe 321 and the second connecting end 412 of the insertion tube 411 to be connected and fixed so as to interlock at their ends.

[0075] A third embodiment of the endoscope device 200 of the present invention is similar to the first embodiment, except for the structure of the first threaded annular body 325 of the connecting unit 32, as shown in Figures 11 and 12.

[0076] The endoscope device 200 of this third embodiment is also suitable for insertion into a catheter 5, and the catheter 5 has a connecting portion 51 and a tube body portion 52. The connecting portion 51 and the tube body portion 52 are integrally formed. Furthermore, as shown in Figures 11 and 12, a screw thread is formed on the outer circumferential surface of the connecting portion 51, and the tube body portion 52 has a tip opening 520 at the end opposite to the connecting portion 51. That is, the connecting portion 51 and the end with the tip opening 520 are opposite ends to each other.

[0077] In this third embodiment, the first threaded annular body 325 has a second annular portion 328, the second annular portion 328 having an inner diameter larger than the first annular portion 327 and extending coaxially from the first annular portion 327 toward the tubular portion 414 of the insertion tube 411.

[0078] The second annular portion 328 surrounds the tubular body portion 414 with a gap between them.

[0079] The camera 421 is configured to take images in the direction that the tip of the main tube portion 52 of the catheter 5 is pointing.

[0080] The insertion tube 411 is configured such that the tube body 414 can be inserted into the main tube portion 52 of the catheter 5 such that the insertion end 413 is at the end opposite to the connection portion 51 of the catheter 5, and the connection portion 51 of the catheter 5 can be fixed in position by abutting against the second connecting end 412 in the direction toward the connecting tube 321.

[0081] When attaching the endoscope device 200 to the catheter 5, insert the insertion end 413 of the insertion tube 411 into the connection 51 of the catheter 5 so that the tube body 414 extends into the main tube portion 52 of the catheter 5 until the connection portion 51 is located near the second connecting end 412 of the insertion tube 411.

[0082] In this configuration, the insertion end 413 of the insertion tube 411 approaches the tip opening 520 of the main body of the tube 52, thereby allowing the camera 421 to photograph the outside through the tip opening 520, the second connecting tube 44 to spray liquid to the outside through the tip opening 520, and the first connecting tube 43 to draw in liquid or gas through the tip opening 520.

[0083] Then, the first threaded annular body 325 is moved toward the insertion tube 411 until the connection portion 51 abuts against the tip of the first annular portion 327 toward the connection tube 321 and is restricted in position, and the position-restricting annular portion 326 abuts against the abutting annular portion 324 toward the insertion tube 411 and is restricted in position, thereby threading the second annular portion 328 onto the connection portion 51 of the catheter 5 and threading the first annular portion 327 onto the second connecting end 412 of the insertion tube 411.

[0084] As shown in Figure 12, in this third embodiment, the second connecting end 412 and the tube body 414 of the insertion tube 411 are formed to have the same outer diameter. Therefore, when the catheter 5 is inserted into the tube body 414, the outer diameter of the connection 51 is larger than the outer diameter of the second connecting end 412. For this reason, the inner diameter of the second annular portion 328 of the first threaded annular body 325 must be larger than the inner diameter of the first annular portion 327.

[0085] However, in another embodiment, as shown in Figure 13, the outer diameter of the tube body portion 414 of the insertion tube 411 can be made smaller than the outer diameter of the second connecting end portion 412. As a result, when the catheter 5 is inserted into the tube body portion 414, the connecting portion 51 and the second connecting end portion 412 are formed to have the same outer diameter, and the insertion tube 411 is configured such that the connecting portion 51 abuts against the second connecting end portion 412 in the direction toward the connecting pipe 321, thereby limiting its position. As a result, the first annular portion 327 and the second annular portion 328 of the first threaded annular body 325 can be formed to have the same inner diameter.

[0086] The connection structure with the catheter 5 in this third embodiment allows the endoscopic device 200 of the present invention to be directly connected to and fixed to the catheter 5, making the insertion and placement of the catheter 5 easier, increasing the success rate of insertion and placement, and improving the quality of medical care.

[0087] Furthermore, in each of the above embodiments, by connecting the first connecting pipe 33 and the first connecting pipe 43 to each other, and connecting the second connecting pipe 34 and the second connecting pipe 44 to each other, suction and spraying can be performed in each respective configuration.

[0088] However, in other embodiments, the first connecting pipe 33 can be combined with the water supply valve 312 and the suction valve 313 so as to communicate with them, without installing the second connecting pipe 34 and the second connecting pipe 44. When the first connecting pipe 33 and the first connecting pipe 43 are combined with each other, the first connecting pipe 33 and the first connecting pipe 43 have suction and spray functions, and suction and spray operations can be performed in the same pipeline by operating the water supply valve 312 and the suction valve 313 separately.

[0089] A fourth embodiment of the endoscope device 200 of the present invention is similar to the third embodiment, except that, as shown in Figures 14 and 15, the connection unit 32 does not have a first threaded annular body for connecting to the catheter 5, the interchangeable insertion tube mechanism 4 further includes a third threaded annular body 45 for combining with the catheter 5, and the combination of the first connecting end 322 and the second connecting end 412 is the same as in the first embodiment.

[0090] In this fourth embodiment, the second connecting end 412 has a connecting portion 417 and a connecting portion 418 that connects the connecting portion 417 and the tubular body portion 414.

[0091] The first connecting pipe connector 431 of the first connecting pipe 43, the second connecting pipe connector 441 of the second connecting pipe 44, and the signal terminal 422 all protrude from the end face of the connecting portion 417.

[0092] The interchangeable insertion tube mechanism 4 is combined with the connecting groove 323 of the first connecting end 322 at the connecting portion 417 of the second connecting end 412 in a manner that allows them to be removably inserted into each other. As a result, the first connecting pipe 43 is connected to the first communication pipe 33, the second connecting pipe 44 is connected to the second communication pipe 34, and the signal terminal 422 is connected to the signal connector 35 for signal transmission. This combination method is the same as in the first embodiment, so a detailed explanation is omitted.

[0093] The insertion tube unit 41 further includes a third threaded annular body 45 attached to the outside of the connecting portion 418 of the second connecting end 412 so as to be movable along the longitudinal direction of the insertion tube 411.

[0094] The third threaded annular body 45 has a third annular portion 451 that is rotatably mounted on the connecting portion 418 of the second connecting end 412 so as to move toward the insertion end 413 without separating from the second connecting end 412, and a fourth annular portion 452 that is larger in diameter than the third annular portion 451 and extends toward the insertion end 413.

[0095] When combining the interchangeable insertion tube mechanism 4 with the catheter 5, the insertion end 413 of the insertion tube 411 is inserted into the connection part 51 of the catheter 5 so that the tube body 414 extends into the main tube portion 52 of the catheter 5 until the connection part 51 is located near the second connecting end 412 of the insertion tube 411.

[0096] Then, the third threaded annular body 45 is rotated to move toward the catheter 5, and the fourth annular portion 452 is threaded around the connection portion 51 of the catheter 5 until the connection portion 51 abuts against the third annular portion 451 toward the connection unit 32 and is restricted in position. As a result, the catheter 5 is fixed to the outside of the insertion tube 411.

[0097] In other words, the third annular portion 451 is configured such that the connection portion 51 of the catheter 5 can be fixed in position by contacting the third annular portion 451 in the direction toward the connection unit 32.

[0098] However, in another embodiment, as shown in Figure 16, when the outer diameter of the tube body portion 414 of the insertion tube 411 is smaller than the outer diameter of the second connecting end portion 412, the connecting portion 51 and the second connecting end portion 412 can be formed to have the same outer diameter, so that when the catheter 5 is inserted into the insertion tube 411, the connecting portion 51 abuts against the connecting portion 418 of the second connecting end portion 412 in the direction toward the connection unit 32, thereby limiting its position. For this reason, the third annular portion 451 and the fourth annular portion 452 of the third screw annular body 45 can be formed to have the same outer diameter, and can be screwed to fit around the connecting portion 51.

[0099] A fifth embodiment of the endoscope device 200 of the present invention is similar to the fourth embodiment, except for the structure of combining the connection unit 32 and the insertion tube unit 41, as shown in Figures 17 and 18.

[0100] In this fifth embodiment, the structure for combining the connection unit 32 and the insertion tube unit 41 is the same as in the second embodiment.

[0101] That is, the connecting structure of the third threaded annular body 45 and the catheter 5 in the fourth embodiment is combined with the second embodiment shown in Figures 9 and 10, so that the connection unit 32 of the handle mechanism 3 and the insertion tube unit 41 of the interchangeable insertion tube mechanism 4 can be combined by the first threaded annular body 325 or the second threaded annular body 416, and the insertion tube unit 41 and the catheter 5 can be combined by the third threaded annular body 45.

[0102] As described above, the removable combination structure of the handle mechanism 3 and the interchangeable insertion tube mechanism 4 allows medical professionals to select and attach an interchangeable insertion tube mechanism 4 having the required outer diameter or length as needed. In other words, multiple interchangeable insertion tube mechanisms 4, each having an insertion tube 411 with a different outer diameter or length, can be selectively combined and used with a single handle mechanism 3. Furthermore, if an interchangeable insertion tube mechanism 4 is damaged while in use in the endoscope device 200, only the damaged interchangeable insertion tube mechanism 4 needs to be replaced, eliminating the need to replace the entire endoscope device 200 and significantly reducing the equipment costs for medical institutions.

[0103] Furthermore, the structure of the first threaded annular body 325 or the third threaded annular body 45 allows the catheter 5 surrounding the insertion tube 411 to be fixed in place. As a result, the endoscope device 200 can be positioned coaxially with the catheter 5, assisting in the insertion and guiding of the catheter 5, thus eliminating the drawback of conventional endoscopes being inserted and guided in parallel outside the catheter.

[0104] Furthermore, the catheter 5, with its connection portion 51 being screwed onto either the first threaded annular body 325 or the third threaded annular body 45, can be stably connected to the endoscope device 200 and can be synchronized with the interchangeable insertion tube mechanism 4, thereby increasing the success rate of insertion and placement.

[0105] Therefore, the endoscope device 200 having the interchangeable insertion tube mechanism 4 of the present invention and the catheter 5 used in the endoscope device 200 of the present invention are novel and convenient inventions that can reliably achieve the objectives of the present invention.

[0106] The above embodiments are illustrative in illustrating the principles and effects of the present invention and do not limit it. A person skilled in the art can make some modifications and alterations to the above embodiments, provided that they do not deviate from the spirit and scope of the invention. Therefore, all modifications and alterations made by a person skilled in the art, provided that they do not deviate from the spirit of the invention, should also be considered to fall within the scope of protection of the present invention. [Industrial applicability]

[0107] The present invention provides an endoscope device in which the insertion tube mechanism can be replaced, as well as a replaceable insertion tube mechanism and catheter used therewith. [Explanation of symbols]

[0108] 200 Endoscopes 3 Handle mechanism 31 Handle Unit 311 Handle body 312 Water supply valve 313 Suction valve 314 Communication Module 32 connection units 321 Connecting pipe 322 First connecting end 323 Connected tank 324 Contact ring section 325 First spiral annular body 326 Position-restricting annular section 327 First annular section 328 Second Ring Section 329 threads 33 First connecting pipe 331 First connecting pipe connector 34 Second connecting pipe 341 Second connecting pipe connector 35 Signal Connectors 4. Replaceable insertion tube mechanism 41 Insertion tube unit 411 Insertion tube 412 Second connecting end 413 Insertion end 414 Tube body 415 threads 416 Second spiral annular body 417 Connection section 418 Connecting section 42 shooting units 421 Camera 422 signal terminals 43 First connecting pipe 430 First opening 431 First connecting pipe connector 44 Second connecting pipe 440 Second opening 441 Second connecting pipe connector 45 Third spiral annular body 451 Third Ring Section 452 Fourth Ring Section 5 Catheter 51 Connection part 52 Pipe body 520 tip opening

Claims

1. Endoscopic equipment including a catheter and an endoscope, The catheter is suitable for attachment to the endoscope device and has an integrally formed connecting portion and tubular body portion. The endoscope device is suitable for insertion into the catheter and includes a handle mechanism and a replaceable insertion tube mechanism. The handle mechanism includes a handle unit, a connecting unit connected to the handle unit and having a first connecting end separated from the handle unit, and a signal connector connected to the handle unit in a signal-transmitting manner and exposed from the first connecting end. The connecting unit includes a connecting pipe on which the first connecting end is formed, and a first threaded annular body attached to the outside of the first connecting end so as to be movable along the longitudinal direction of the connecting pipe, The interchangeable insertion tube mechanism includes an insertion tube unit having a second connecting end and an insertion end which is the opposite end of the second connecting end, and an imaging unit attached to the insertion tube unit. The insertion tube unit includes an insertion tube on which the second connecting end and the insertion end are formed. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The imaging unit comprises an imaging device attached to the insertion end, and a signal terminal connected to the imaging device in a signal-transmitting manner and exposed from the second connecting end. The second connecting end of the insertion tube unit is removably coaxially connected to the first connecting end such that the signal terminal is removably connected to the signal connector for signal transmission. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The first threaded annular body is threaded to be removably fitted around the second connecting end, and the ends of the first connecting end and the second connecting end are connected and fixed together. The first screwed annular body has a first annular portion that is screwed onto the second connecting end and a second annular portion that is screwed onto the connecting portion. The connecting portion of the catheter is configured such that the insertion end of the insertion tube is inserted into it, surrounding the insertion tube, and that it moves along the insertion tube to the connecting tube, and is positioned and restricted by contacting the first annular portion of the first screw annular body or the second connecting end of the insertion tube, and can be screwed into the second annular portion of the first screw annular body. The endoscopic device is characterized in that the main tube portion of the catheter is configured to accommodate the insertion end portion inserted into the connection portion, and the end portion opposite to the connection portion has a tip opening for the camera to take pictures of the outside.

2. Endoscopic equipment including a catheter and an endoscope, The catheter is suitable for attachment to the endoscope device and has an integrally formed connecting portion and tubular body portion. The endoscope device is suitable for insertion into the catheter and includes a handle mechanism and a replaceable insertion tube mechanism. The handle mechanism includes a handle unit, a connecting unit connected to the handle unit and having a first connecting end separated from the handle unit, and a signal connector connected to the handle unit in a signal-transmitting manner and exposed from the first connecting end. The connection unit includes a connecting pipe on which the first connecting end is formed. The interchangeable insertion tube mechanism includes an insertion tube unit and an imaging unit attached to the insertion tube unit. The insertion tube unit includes an insertion tube having a second connecting end and an insertion end which is the opposite end of the second connecting end, and a third threaded annular body attached to the outside of the second connecting end so as to be movable along the longitudinal direction of the insertion tube, The imaging unit comprises an imaging device attached to the insertion end, and a signal terminal connected to the imaging device in a signal-transmitting manner and exposed from the second connecting end. The second connecting end is detachably coaxially coupled to the first connecting end such that the signal terminal is detachably connected to the signal connector in a signal-transmitting manner. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The third screwed annular body has a third annular portion that is fitted around the second connecting end so as to move toward the insertion end without separating from the second connecting end, and a fourth annular portion that is screwed to fit around the connecting portion. The connecting portion of the catheter is configured such that the insertion end of the insertion tube is inserted into it, surrounding the insertion tube, and that it moves along the insertion tube to the connecting tube, and is positioned and restricted by contacting the third annular portion of the third threaded annular body or the second connecting end of the insertion tube, and that it can be threaded by being fitted around the fourth annular portion of the third threaded annular body. The endoscopic device is characterized in that the main tube portion of the catheter is configured to accommodate the insertion end portion inserted into the connection portion, and the end portion opposite to the connection portion has a tip opening for the camera to take pictures of the outside.

3. Endoscopic equipment including a catheter and an endoscope, The catheter is suitable for attachment to the endoscope device and has an integrally formed connecting portion and tubular body portion. The endoscope device is suitable for insertion into the catheter and includes a handle mechanism and a replaceable insertion tube mechanism. The handle mechanism includes a handle unit, a connecting unit connected to the handle unit and having a first connecting end separated from the handle unit, and a signal connector connected to the handle unit in a signal-transmitting manner and exposed from the first connecting end. The connecting unit includes a connecting pipe on which the first connecting end is formed, and a first threaded annular body attached to the outside of the first connecting end so as to be movable along the longitudinal direction of the connecting pipe, The interchangeable insertion tube mechanism includes an insertion tube unit having a second connecting end and an insertion end which is the opposite end of the second connecting end, and an imaging unit attached to the insertion tube unit. The imaging unit comprises an imaging device attached to the insertion end, and a signal terminal connected to the imaging device in a signal-transmitting manner and exposed from the second connecting end. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The insertion tube unit includes an insertion tube on which the second connecting end and the insertion end are formed, and a third threaded annular body attached to the outside of the second connecting end so as to be movable along the longitudinal direction of the insertion tube, The second connecting end is detachably coaxially coupled to the first connecting end such that the signal terminal is detachably connected to the signal connector in a signal-transmitting manner. The first threaded annular body is threaded to be removably fitted around the second connecting end, and the ends of the first connecting end and the second connecting end are connected and fixed together. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The third screwed annular body has a third annular portion that is fitted around the second connecting end so as to move toward the insertion end without separating from the second connecting end, and a fourth annular portion that is screwed to fit around the connecting portion. The connecting portion of the catheter is configured such that the insertion end of the insertion tube is inserted into it, surrounding the insertion tube, and that it moves along the insertion tube to the connecting tube, and is positioned and restricted by contacting the third annular portion of the third threaded annular body or the second connecting end of the insertion tube, and that it can be threaded by being fitted around the fourth annular portion of the third threaded annular body. The endoscopic device is characterized in that the main tube portion of the catheter is configured to accommodate the insertion end portion inserted into the connection portion, and the end portion opposite to the connection portion has a tip opening for the camera to take pictures of the outside.

4. Endoscopic equipment including a catheter and an endoscope, The catheter is suitable for attachment to the endoscope device and has an integrally formed connecting portion and tubular body portion. The endoscope device is suitable for insertion into the catheter and includes a handle mechanism and a replaceable insertion tube mechanism. The handle mechanism includes a handle unit, a connecting unit connected to the handle unit and having a first connecting end separated from the handle unit, and a signal connector connected to the handle unit in a signal-transmitting manner and exposed from the first connecting end. The connection unit includes a connecting pipe on which the first connecting end is formed. The interchangeable insertion tube mechanism includes an insertion tube unit having a second connecting end and an insertion end which is the opposite end of the second connecting end, and an imaging unit attached to the insertion tube unit. The imaging unit comprises an imaging device attached to the insertion end, and a signal terminal connected to the imaging device in a signal-transmitting manner and exposed from the second connecting end. The aforementioned camera is configured to take images in the direction toward the tip of the main body of the catheter, The insertion tube unit includes an insertion tube on which the second connecting end and the insertion end are formed, a second threaded annular body attached to the outside of the second connecting end so as to be movable along the longitudinal direction of the insertion tube, and a third threaded annular body attached to the outside of the second connecting end so as to be movable along the longitudinal direction of the insertion tube. The second connecting end is detachably coaxially coupled to the first connecting end such that the signal terminal is detachably connected to the signal connector in a signal-transmitting manner. The second threaded annular body is threaded to be removably attached to the first connecting end, and the ends of the first connecting end and the second connecting end are connected and fixed together. The insertion tube is configured to be inserted into the main body of the catheter such that the insertion end is at the end of the catheter opposite to the connection part. The third screwed annular body has a third annular portion that is fitted around the second connecting end so as to move toward the insertion end without separating from the second connecting end, and a fourth annular portion that is screwed so as to be fitted around the connecting portion. The connecting portion of the catheter is configured such that the insertion end of the insertion tube is inserted into it, surrounding the insertion tube, and that it moves along the insertion tube to the connecting tube, and is positioned and restricted by contacting the third annular portion of the third threaded annular body or the second connecting end of the insertion tube, and that it can be threaded by being fitted around the fourth annular portion of the third threaded annular body. The endoscopic device is characterized in that the main tube portion of the catheter is configured to accommodate the insertion end portion inserted into the connection portion, and the end portion opposite to the connection portion has a tip opening for the camera to take pictures of the outside.

Images