The present invention relates to a steering joint, particularly to a steering joint applicable to endoscopes.
An endoscope can reach cavities, which the naked eyes are unlikely to observe directly. Therefore, endoscopes have been extensively used in industry and medicine. Especially, the application of endoscopes to medicine favors medical diagnosis very much. An endoscope may access cavities of a human body through tiny channels of the human body. For an example, an endoscope may reach the lung through a bronchial tube. For another example, an endoscope may enter the bladder through the urinary tract. Hence, miniaturizing the endoscopic steering joint has become an important subject of the concerned field.
A conventional endoscopic steering joint comprises a plurality of annuluses structured identically and connected in sequence by a steering control line. For the abovementioned structure, miniaturized annuluses are hard to assemble and likely to have a larger accumulated tolerance. Thus, the conventional endoscopic steering joint makes the endoscope hard to operate smooth. Another conventional endoscopic steering joint is in form of a tubular structure, which is fabricated into a one-piece component and has a plurality of cut grooves on the tube wall. The cut grooves favor the bending of the steering joint. However, the injection molding technology is less likely to produce a long and thin steering joint meeting the requirement of miniaturization. Besides, the mold may be consumed fast, which would raise the fabrication cost.
Accordingly, an easy-to-produce miniaturized steering joint has become a target the manufacturers are eager to achieve.
The present invention provides a steering joint, which is formed by connecting a plurality of tubular structures each having a smaller aspect ratio, whereby the steering joint can be easily produced in an injection molding technology, and whereby is simplified the assembling process of the steering joint and reduced the accumulated tolerance of the steering joint. The present invention also provides an endoscope using the same.
One embodiment of the present invention provides a steering joint, which comprises a first tubular member and a second tubular member. The first tubular member includes a first opening, a second opening, a plurality of first cuts, and a plurality of first line slots. The end of the first opening has an accommodation portion for accommodating an endoscopic image module. The plurality of first cuts is diametrically opposite to each other to define a plurality of first connection segments and a plurality of first annulus structures. The plurality of first line slots axially passes through the plurality of first annulus structures. The end of the second opening has a first joint portion, and the first line slot passes through the first joint portion. The second tubular member includes a third opening, a fourth opening, a plurality of second cuts, and a plurality of second line slots. The end of the third opening has a second joint portion, which is to be connected with the first joint portion of the first tubular member. The plurality of second cuts is diametrically opposite to each other to define a plurality of second connection segments and a plurality of second annulus structures. The plurality of second line slots axially passes through the plurality of second annulus structures and is corresponding to the first line slots. A plurality of steering control lines is disposed inside the plurality of first line slots and the plurality of second line slots for steering the first opening of the first tubular member.
Another embodiment of the present invention provides an endoscope, which comprises an endoscopic image module, a steering joint, a plurality of steering control lines, a plurality of electric cables and an electric connector. The endoscopic image module can be extended to a cavity to capture images inside the cavity and generate corresponding electronic signals. The steering joint includes a first tubular member and a second tubular member. The first tubular member includes a first opening, a second opening, a plurality of first cuts, and a plurality of first line slots. The end of the first opening has an accommodation portion for accommodating the endoscopic image module. The plurality of first cuts is diametrically opposite to each other to define a plurality of first connection segments and a plurality of first annulus structures. The plurality of first line slots axially passes through the plurality of first annulus structures. The end of the second opening has a first joint portion, and the first line slot passes through the first joint portion. The second tubular member includes a third opening, a fourth opening, a plurality of second cuts, and a plurality of second line slots. The end of the third opening has a second joint portion, which is to be connected with the first joint portion of the first tubular member. The plurality of second cuts is diametrically opposite to each other to define a plurality of second connection segments and a plurality of second annulus structures. The plurality of second line slots axially passes through the plurality of second annulus structures and is corresponding to the first line slots. The plurality of steering control lines is disposed inside the plurality of first line slots and the plurality of second line slots for steering the first opening of the first tubular member. The plurality of electric cables is electrically connected with the endoscopic image module. The electric connector is electrically connected with the plurality of electric cables. The endoscope of the present invention may be electrically connected with an external electronic device through the electric connector in a pluggable way.
The objective, technologies, features and advantages of the present invention will become apparent from the following description in conjunction with the accompanying drawings wherein certain embodiments of the present invention are set forth by way of illustration and example.
The foregoing conceptions and their accompanying advantages of this invention will become more readily appreciated after being better understood by referring to the following detailed description, in conjunction with the accompanying drawings, wherein:
Various embodiments of the present invention will be described in detail below and illustrated in conjunction with the accompanying drawings. In addition to these detailed descriptions, the present invention can be widely implemented in other embodiments, and apparent alternations, modifications and equivalent changes of any mentioned embodiments are all included within the scope of the present invention and based on the scope of the Claims. In the descriptions of the specification, in order to make readers have a more complete understanding about the present invention, many specific details are provided; however, the present invention may be implemented without parts of or all the specific details. In addition, the well-known steps or elements are not described in detail, in order to avoid unnecessary limitations to the present invention. Same or similar elements in Figures will be indicated by same or similar reference numbers. It is noted that the Figures are schematic and may not represent the actual size or number of the elements. For clearness of the Figures, some details may not be fully depicted.
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The second tubular member 20 includes a third opening 21, a fourth opening 22, a plurality of second cuts 23, and a plurality of second line slots 24. The plurality of second cuts 23 is diametrically opposite to each other to define a plurality of second connection segments 26 and a plurality of second annulus structures 27. The plurality of second annulus structures 27 is connected by the plurality of second connection segments 26. In one embodiment, the second cut 23 may be a U-shaped notch or a V-shaped notch. In other words, the internal surfaces of the second cut 23, which are opposite to each other, are almost parallel to each other or have an included angle opened outwards. The plurality of second line slots 24 axially passes through the plurality of second annulus structures 27 and is corresponding to the first line slots 14. A plurality of steering control lines 50 may be disposed inside the plurality of first line slots 14 and the plurality of second line slots 24 for steering the first opening 11 of the first tubular member 10. In one embodiment, a proximal end of the accommodation portion of the first tubular member 10 has a plurality of fixing slots 18, and the ends of the plurality of steering control lines 50 are fixed in the fixing slots 18. Based on the abovementioned structure, pulling one of the steering control lines 50 may decrease the spacing of the first cuts 13 and the spacing of the second cuts 23 on the same side to change the direction of the first opening 11 of the first tubular member 10.
The end of the third opening 21 has a second joint portion 25. The first tubular member 10 and the second tubular member 20 may be produced to be a steering joint having appropriate length via the mutual joint of the first joint portion 17 and the second joint portion 25. In the embodiment shown in
It is easily understood: the steering joint should have a sufficient number of the first annulus structures 16 and a sufficient number of the second annulus structures 27 so that the steering joint can achieve a required bend angle and a required bend radius. Based on the abovementioned structure, the steering joint of the present invention can acquire a sufficient number of the first annulus structures 16 and a sufficient number of the second annulus structures 27 merely via joining the first tubular member 10 and the second tubular member 20. Thus is reduced the tolerance accumulated in assemblage. Besides, a single first annulus structure 16 or a single second annulus structure 27 has a smaller aspect ratio. Therefore, the first annulus structures 16 and the second annulus structures 27 can be injection-molded easily, and the molds thereof are worn more slowly. In brief, the steering joint of the present invention decreases the fabrication cost significantly, has higher assembling precision and operates smoother.
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The plurality of steering control lines 50 is disposed inside the plurality of first line slots 14 of the first tubular member 10 and the plurality of second line slots 24 of the second tubular member 20 for steering the end of the first opening 11 of the first tubular member 10. The plurality of electric cables 41 is electrically connected with the endoscopic image module 40. The electric connector 60 is electrically connected with the plurality of electric cables 41. The endoscope of the present invention may be electrically connected with an external electronic device, such as a computer, a mobile Internet-access device or an electronic device dedicated to the endoscope, through the electric connector 60 in a pluggable way. Based on the abovementioned structure, the endoscope of the present invention can be cleaned and sterilized easily or used as a disposable device. In one embodiment, the electric connector 60 may be a USB interface, a connection interface of an Internet-access device, or another appropriate electric connector. In one embodiment, the endoscope of the present invention further comprises an electronic element 70, which is electrically connected with the endoscopic image module 40 and the electric connector 60. The electronic element 70 can process the electronic signals generated by the endoscopic image module 40 to facilitate the external electronic device to perform further treatment. In one embodiment, the endoscope of the present invention further comprises an operation member coupled to the plurality of steering control lines 50 to facilitate the operator to hold the and operate the endoscope. The persons killed in the art can use the existing technologies to realize the operation member. Therefore, the details of the operation member will not repeat herein.
In conclusion, the steering joint of the present invention comprises a plurality of tubular members having smaller aspect ratios, which favors injection molding and decelerates mold wearing. Besides, fewer tubular members can simplify the assembling process, decrease accumulated tolerance, and make operation smoother.
While the invention is susceptible to various modifications and alternative forms, a specific example thereof has been shown in the drawings and is herein described in detail. It should be understood, however, that the invention is not to be limited to the particular form disclosed, but to the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the appended claims.
Number | Date | Country | Kind |
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110135704 | Sep 2021 | TW | national |