Traction mechanism, handle and endoscope

Abstract

The present invention discloses a traction mechanism, a handle and an endoscope, and relates to the technical field of medical devices. The traction mechanism of the present invention comprises a thumbwheel, a first traction rope and a second traction rope wound around both sides of the thumbwheel, and the traction mechanism also comprises a first rotating part and a second rotating part, wherein the distal ends of the first traction rope and the second traction rope are fixedly connected to the distal end of the active bending section of the endoscope, and the proximal ends are respectively fixed to the first rotating part and the second rotating part, and the first rotating part and the second rotating part are rotationally connected to the thumbwheel, and based on the rotation of the thumbwheel, the first rotating part and the second rotating part have at least a first state and a second state, in the first state, the first rotating part and the second rotating part rotate in the same direction as the thumbwheel; in the second state, one of the first rotating part and the second rotating part rotates in the same direction as the thumbwheel, and the other remains fixed. The traction mechanism of the present invention can ensure that the limit bending angle of the active bending section is not affected when the thumbwheel size is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a traction mechanism, a handle and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device that can directly enter the human body for examination and provide doctors with sufficient diagnostic information. An endoscope usually includes: an insertion part for inserting into the human body, a handle for controlling the bending of the front end of the insertion part, and a display device for displaying the internal environment of the human body's natural cavity; the endoscope can realize the internal observation of the human body, the exploration of lesions, and the treatment of lesions through the cooperation of the above three parts.

[0003] After the insertion part is inserted into the human body, the camera module at the far end of the insertion part provides the doctor with diagnostic information. If necessary, a treatment instrument can be inserted into the endoscope to complete sampling or treatment of the lesion, or a negative pressure source can be attached to collect tissue samples from the lesion. To perform the above operations, the direction of the distal component needs to be adjusted at any time to align the camera module and the instrument tube port with the lesion.

[0004] The distal end of the insertion part of the endoscope in the related art is the active bending section, and two traction ropes are arranged in the handle. The distal end of the traction rope is connected to the active bending section, and the proximal end is fixed on the dial wheel, and the two traction ropes are located on both sides of the dial wheel. In the natural state, the two traction ropes are in a taut state. By turning the lever, the two traction ropes can be moved synchronously in different directions, so that the active bending section of the insertion part is bent.

[0005] According to user feedback, the current endoscope handle has the problem of being large in size and inconvenient to hold and operate. Therefore, it is urgent to miniaturize the size of the endoscope handle to improve the convenience of user holding and operating. However, the layout inside the current endoscope handle is compact, and it is difficult to reduce the size of the handle by compressing the free space inside the handle. The inventor found that the radial size of the handle is mainly determined by the size of the thumbwheel. If the thumbwheel size is reduced, the travel of the traction rope will be reduced, affecting the limit bending angle of the active bending section.

[0006] Therefore, when the size of the thumbwheel is reduced, how to ensure that the limit bending angle of the active bending section is not affected becomes a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0007] The invention discloses a traction mechanism, a handle and an endoscope, so as to solve the technical problem of how to ensure that the limit bending angle of the active bending section is not affected when the size of the thumbwheel is reduced.

[0008] In order to solve the above problems, the present invention adopts the following technical solutions:

[0009] A first aspect of the present invention provides a traction mechanism.

[0010] The traction mechanism of the present invention is used on an endoscope, and the traction mechanism includes a thumbwheel, a first traction rope and a second traction rope wound around both sides of the thumbwheel, and the traction mechanism also includes a first rotating part and a second rotating part, wherein the distal ends of the first traction rope and the second traction rope are fixedly connected to the distal end of the active bending section of the endoscope, and the proximal ends are respectively fixed to the first rotating part and the second rotating part, and the first rotating part and the second rotating part are rotationally connected to the thumbwheel. Based on the rotation of the thumbwheel, the first rotating part and the second rotating part have at least a first state and a second state, and in the first state, the first rotating part and the second rotating part rotate in the same direction as the thumbwheel; in the second state, one of the first rotating part and the second rotating part rotates in the same direction as the thumbwheel, and the other remains fixed.

[0011] According to an optional embodiment, the thumbwheel has a notch, the first rotating part and the second rotating part are respectively arranged at two ends of the notch, and the first rotating part and the second rotating part are located on a rotation path of the thumbwheel.

[0012] According to an optional embodiment, the two ends of the thumbwheel are respectively a first end face and a second end face, and when the active bending section of the endoscope is in a straight state, the first rotating portion is in surface contact with the first end face, and the second rotating portion is in surface contact with the second end face.

[0013] According to an optional embodiment, the first rotating part includes a first plate body and a first mounting part, the proximal end of the first traction rope is fixed on the first plate body, and the first mounting part can be rotatably mounted on the thumbwheel; the second rotating part includes a second plate body and a second mounting part, the proximal end of the second traction rope is fixed on the second plate body, and the second mounting part can be rotatably mounted on the thumbwheel.

[0014] According to an optional embodiment, the first mounting portion and the second mounting portion are ring structures, and the first mounting portion and the second mounting portion are both coaxially arranged with the thumbwheel.

[0015] According to an optional embodiment, a first mounting hole is provided on the first plate body, the first traction rope passes through the first mounting hole, a first blocking portion is provided at the proximal end of the first traction rope, and the size of the first blocking portion is larger than the aperture of the first mounting hole; a second mounting hole is provided on the second plate body, the second traction rope passes through the second mounting hole, a second blocking portion is provided at the proximal end of the second traction rope, and the size of the second blocking portion is larger than the aperture of the second mounting hole.

[0016] According to an optional embodiment, the traction mechanism further includes a driving member, and the driving member includes a toggle member and a fixed shaft, wherein the fixed shaft is fixedly connected to the thumbwheel, and the fixed shaft is also fixedly connected to the toggle member.

[0017] According to an optional embodiment, a fixing hole is provided on the thumbwheel, the fixing hole is used to install the fixed shaft, and the fixing hole is fixedly connected to the fixed shaft; the fixing hole protrudes from the thumbwheel, and the outer wall of the fixing hole is formed into a mounting seat, and the mounting seat is used to install the first rotating part and the second rotating part.

[0018] A second aspect of the present invention provides a handle.

[0019] The handle of the present invention comprises a shell and a traction mechanism, wherein the shell is used to install the traction mechanism, and the traction mechanism is the traction mechanism described in any one of the technical solutions of the present invention.

[0020] A third aspect of the present invention provides an endoscope.

[0021] The endoscope of the present invention comprises an insertion portion and a handle, wherein the handle is connected to the insertion portion, wherein the insertion portion comprises an active bending section and a passive bending section connected to each other, and the handle is the handle described in any technical solution of the present invention.

[0022] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0023] In the traction mechanism of the present invention, when the first rotating part and the second rotating part are in the first state, during the movement, one of the first traction rope and the second traction rope is always in a taut state, and the other one becomes redundant; when the first rotating part and the second rotating part are in the second state, the traction rope in the taut state continues to move and is in a taut state driven by the rotation force of the thumbwheel; the redundant traction rope, at its far end, continues to move due to the tension of the bending of the active bending section until its redundancy is completely released, and since the proximal end of the traction rope is separated from the thumbwheel, the traction rope can be prevented from being generated with tension during the rotation of the thumbwheel, that is, the traction rope can be prevented from being subjected to the reverse tension caused by the rotation of the thumbwheel.

[0024] It can be seen that in the traction mechanism of the present invention, when the thumbwheel rotates when the first rotating part and the second rotating part are in the second state, the active bending section can still continue to bend, thereby ensuring that the maximum bending angle of the active bending section is not affected when the thumbwheel size is reduced, which is conducive to miniaturization of the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the cooperation between the thumbwheel and the first traction rope and the second traction rope in the related art;

[0027] Figure 2 It is a state diagram of the first traction rope and the second traction rope when the thumbwheel rotates to the limit in the related art;

[0028] Figure 3 is a schematic diagram of an active bending section in a straightened state in the related art;

[0029] Figure 4 It is a schematic diagram of a snake bone joint in the related art;

[0030] Figure 5 is a schematic diagram of an active bending section in a bending state in the related art;

[0031] Figure 6 is a schematic diagram of an endoscope according to an embodiment of the present application;

[0032] Figure 7 is a first schematic diagram of an embodiment of the present application in which the thumbwheel is in a first position;

[0033] Figure 8 is a second schematic diagram of the thumbwheel in the first position according to the embodiment of the present application;

[0034] Fig. 9 is a schematic diagram of the thumbwheel in the second position according to an embodiment of the present application;

[0035] Fig.10 is a schematic diagram of the thumbwheel in the third position according to an embodiment of the present application;

[0036] Fig.11 It is the first schematic diagram of the dial of this application;

[0037] Fig.12 It is a second schematic diagram of the present application thumbwheel;

[0038] Fig.13 is a schematic diagram of a first rotating part of an embodiment of the present application;

[0039] Fig.14 It is a schematic diagram of the second rotating part of the embodiment of the present application.

[0040] In the figure: 100, traction mechanism; 110, dial wheel; 111, missing groove; 112, first end face; 113, second end face; 114, fixing hole; 115, mounting seat; 120, first traction rope; 121, first blocking part; 122, first fixing point; 130, second traction rope; 131, second blocking part; 132, second fixing point; 140, first rotating part; 141, first plate body; 1411, first mounting hole; 142, first mounting part; 150, second rotating part; 151, second plate body; 1511, second mounting hole; 152, second mounting part; 160, driving member; 161, toggle member; 162, fixed shaft; 200, insertion part; 210, active bending section; 211, snake bone joint; 212, rivet; 213, traction rope mounting hole; 220, passive bending section; 300, handle. DETAILED DESCRIPTION

[0041] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0042] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0043] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0044] Figure 1 FIG. 1 is a schematic diagram showing the cooperation between the thumbwheel 110 and the traction rope in the related art. Figure 1As shown, a first traction rope 120 and a second traction rope 130 are respectively provided on both sides of the thumbwheel 110. The distal ends of the first traction rope 120 and the second traction rope 130 are fixedly connected to the last snake bone segment 211 of the active bending segment 210. The proximal ends of the first traction rope 120 and the second traction rope 130 are fixed on the thumbwheel 110, which are the first fixing point 122 and the second fixing point 132, respectively. Figure 1 As shown. In the natural state, the first traction rope 120 and the second traction rope 130 are both in a taut state, and the active bending section 210 is in a straight state. The dial lever or knob can drive the dial wheel 110 to rotate, and the first traction rope 120 and the second traction rope 130 move synchronously in opposite directions, so that the active bending section 210 bends. The limit bending angle of the active bending section 210 is determined by the movement stroke of the first traction rope 120 and the second traction rope 130.

[0045] During the research process, the inventors considered the following idea: when the size of the thumbwheel 110 is reduced, the rotation angle of the thumbwheel 110 is increased to ensure that the travel of the traction rope is not affected, thereby ensuring that the limit bending angle of the active bending section 210 remains unchanged. However, the inventors found that this solution cannot achieve the purpose of not affecting the limit bending angle of the active bending section 210 when the size of the thumbwheel 110 is reduced.

[0046] Specifically, Figure 2 The schematic diagram of the dial wheel 110 rotating to a critical position in the related art is shown. The critical position is the position where the first traction rope 120 and the second traction rope 130 are both subjected to the pulling force caused by the rotation of the dial wheel 110. When the dial wheel 110 rotates, the first fixed point 122 and the second fixed point 132 also move accordingly. Since the proximal ends of the first traction rope 120 and the second traction rope 130 are both fixed on the thumbwheel 110, when the thumbwheel 110 reaches the critical position, if the lever is continuously turned to rotate the thumbwheel 110, the first traction rope 120 and the second traction rope 130 will both be subjected to the tension caused by the rotation of the thumbwheel 110 (before the critical position, the first traction rope 120 should be subjected to the tension caused by the rotation of the thumbwheel 110, and the second traction rope 130 will be subjected to the tension caused by the bending of the active bending section 210), that is, the first traction rope 120 and the second traction rope 130 both pull the active bending section 210, and at the same time, the distal end of the second traction rope 130 is also subjected to the tension of the active bending section 210, so that the active bending section 210 cannot continue to bend, and therefore the critical position is defined as the extreme position of the rotation of the thumbwheel 110. It can be seen that the required stroke can be achieved by rotating the dial wheel 110 to the extreme position in the related art. If the size of the dial wheel 110 is reduced, when the dial wheel 110 is rotated to the extreme position, even if the lever is continued to be turned to drive the dial wheel 110 to rotate, the active bending section 210 cannot continue to bend, and may even cause damage to the active bending section 210, and the active bending section 210 cannot achieve the preset extreme bending angle.

[0047] On the other hand, the inventors also found in their research that when the dial 110 is rotated to the extreme position, one of the traction ropes is always in a taut state, while the other traction rope is redundant (the redundancy phenomenon means that the traction rope is in a slack state, or in other words, the traction rope is in a non-taut state). Specifically, the traction rope on the side away from the bending direction is redundant. Taking the counterclockwise rotation of the dial 110 as an example, when the dial 110 is rotated to the extreme position, the first traction rope 120 is in a taut state, and the second traction rope 130 is redundant, such as Figure 2 Similarly, the thumbwheel 110 rotates clockwise, and when the thumbwheel 110 rotates to the limit position, the first traction rope 120 becomes redundant, and the second traction rope 130 is in a taut state.

[0048] Specifically, taking the case where the second traction rope 130 is redundant when the thumbwheel 110 rotates counterclockwise as an example, the inventors have found that the reasons for the redundant phenomenon of the second traction rope 130 may be as follows. The reasons for the redundant phenomenon of the second traction rope 130 found by the inventors are described in detail below.

[0049] First aspect: redundancy caused by the change in position of the traction rope in the traction rope installation portion during the bending process of the active bending section 210.

[0050] Figure 3 FIG. 2 shows a schematic diagram of the active bending section 210 in the related art in a straightened state. Figure 3 As shown, the active bending section 210 includes a plurality of snake bone joints 211, and adjacent snake bone joints 211 are connected by rivets 212. There is also a gap between adjacent snake bone joints 211, and the gap is used to provide space for the bending of the active bending section 210. The snake bone joints 211 are provided with traction rope installation holes 213, and the traction rope installation holes 213 are recessed toward the center of the snake bone joints 211, as shown in FIG. Figure 4 As shown. Usually, the size of the traction rope installation hole 213 is larger than the size of the first traction rope 120 and the second traction rope 130. When the first traction rope 120 and the second traction rope 130 are installed in the traction rope installation hole 213, the first traction rope 120 and the second traction rope 130 have a certain movable space in the traction rope installation hole 213. Specifically, the first traction rope 120 and the second traction rope 130 pass through the traction rope installation hole 213 on each snake bone segment 211, and then the distal end is fixedly connected to the last snake bone segment 211, as shown in FIG. Figure 3 Typically, the distal ends of the first traction rope 120 and the second traction rope 130 are welded to the inner wall of the last segment of the snake bone segment 211. When the active bending section 210 is in a straightened state, the first traction rope 120 and the second traction rope 130 are located on one side of the traction rope installation hole 213 close to the inner wall of the snake bone segment 211.

[0051] Figure 5 A schematic diagram of the active bending section 210 in the related art in a bending state is shown. The first traction rope 120 located on the bending direction side is located on the side close to the inner wall of the snake bone joint 211 in the traction rope installation hole 213, while the second traction rope 130 away from the bending direction side has a tendency to move toward the side away from the inner wall of the snake bone joint 211 in the traction rope installation hole 213. In fact, it is located on the side away from the inner wall of the snake bone joint 211 in the traction rope installation hole 213. At the same time, on the bending section direction side, two adjacent snake bone joints 211 abut against each other, that is, the gap between the two adjacent snake bone joints 211 on the bending direction side is reduced to 0; and on the side away from the bending direction, the gap between the two adjacent snake bone joints 211 increases, such as Figure 5 shown.

[0052] When the active bending section 210 is in the straightened state, the vertical distances between the first traction rope 120 and the second traction rope 130 and the rivet 212 are both a, the length of the snake bone joint 211 in its axial direction is b, the gap between two adjacent snake bone joints 211 is c, and the active bending section 210 has n snake bone joints 211. Therefore, when the active bending section 210 is in the straightened state, the length of the active bending section 210 can be expressed as: b*n+(n-1)*c, and at this time, the lengths of the first traction rope 120 and the second traction rope 130 corresponding to the active bending section 210 are both: b*n+(n-1)*c.

[0053] When the active bending section 210 is in a bending state, the vertical distance between the first traction rope 120 and the rivet 212 on the bending direction side is a, and the vertical distance between the second traction rope 130 and the rivet 212 on the side away from the bending direction is a'. Obviously, a'<a. The length of the active bending section 210 on the bending direction side is: b*n, and the length of the first traction rope 120 corresponding to the active bending section 210 is b*n; the length of the active bending section 210 on the side away from the bending direction is: b*n+(n-1)*c+(n-1)*c, and the length of the second traction rope 130 corresponding to the active bending section 210 is b*n+(n-1)*c+(n-1)*c'. Since the second traction rope 130 on the side away from the bending direction is located on the side away from the inner wall of the snake bone joint 211 in the traction rope installation hole 213, that is, away from the bending direction, the increased length of the second traction rope 130 is less than the increased length of the active bending section 210, that is, c'<c. Since the length of the first traction rope 120 is reduced by (n-1)*c, the length of the second traction rope 130 is increased by (n-1)*c', and c'<c, the second traction rope 130 on the side away from the bending direction is redundant.

[0054] The second aspect is the redundancy caused by the unbalanced force on the traction rope during the bending process of the active bending section 210.

[0055] Specifically, the distal ends of the first traction rope 120 and the second traction rope 130 are connected to the terminal snake bone segment 211, and the proximal ends are fixedly connected to the dial wheel 110. When the dial wheel 110 rotates counterclockwise, the first traction rope 120 is subjected to the tension caused by the rotation of the dial wheel 110, and then the movement of the first traction rope 120 drives the active bending section 210 to bend; at the same time, during the bending process of the active bending section 210, the active bending section 210 applies tension to the second traction rope 130, so that the first traction rope 120 and the second traction rope 130 move synchronously in different directions. Since the tension applied by the active bending section 210 is less than the tension caused by the rotation of the dial wheel 110, that is, the tension on the first traction rope 120 is greater than the tension on the second traction rope 130, in this case, the second traction rope 130 may also be redundant.

[0056] The traction mechanism of the present application, when the thumbwheel 110 rotates to the critical position where both the first traction rope 120 and the second traction rope 130 are subjected to the tension caused by the rotation of the thumbwheel 110, the proximal end of the traction rope that should not be subjected to the tension caused by the rotation of the thumbwheel 110 is separated from the thumbwheel 110, so that when the thumbwheel 110 continues to rotate, only the distal end of the traction rope is subjected to the tension caused by the bending of the active bending section 210, and by utilizing the redundancy of the traction rope during the first stage of bending of the active bending section 210, the traction rope can continue to move with the active bending section 210 under the action of the bending tension of the active bending section 210, while the proximal end thereof will not be subjected to the reverse tension caused by the rotation of the thumbwheel 110, so as to ensure that the extreme bending angle of the active bending section 210 is not affected when the size of the thumbwheel 110 is reduced.

[0057] That is, in the traction mechanism of the present application, when the dial 110 rotates to the critical position where both the first traction rope 120 and the second traction rope 130 are subjected to the tension caused by the rotation of the dial 110, the critical position is not the extreme position of the rotation of the dial 110. At this time, continuing to turn the dial 110 can still allow the active bending section 210 to continue to bend.

[0058] The following is combined with Figures 6 to 14 , the traction mechanism, handle and endoscope provided in the present application are described in detail through specific embodiments and their application scenarios.

[0059] The first aspect of this embodiment provides a detailed description of the traction mechanism of the present application.

[0060] The traction mechanism of this embodiment is used on an endoscope. The endoscope includes a handle 300 and an insertion portion 200. The handle 300 is provided with an operating member for convenient operation by a doctor. The insertion portion 200 is used to be inserted into a cavity, such as Figure 6 The insertion part 200 has an active bending section 210 at its distal end, and a camera module and other structures are provided on the distal end surface of the active bending section 210. The traction mechanism is used to adjust the bending angle of the active bending section 210.

[0061] The traction mechanism of this embodiment includes a dial wheel 110, a first traction rope 120 and a second traction rope 130. Figure 7~Figure 10 The dial wheel 110 serves as the installation base for the first traction rope 120 and the second traction rope 130. Specifically, the first traction rope 120 and the second traction rope 130 are wound around the two sides of the dial wheel 110, so that when the dial wheel 110 rotates, the first traction rope 120 and the second traction rope 130 can move synchronously in opposite directions, such as Figure 7~Figure 10 shown.

[0062] Exemplarily, a groove is provided in the circumferential direction of the thumbwheel 110, and the proximal ends of the first traction rope 120 and the second traction rope 130 are located in the groove, so that when the first traction rope 120 and the second traction rope 130 move, the groove can play a guiding and limiting role to prevent the first traction rope 120 and the second traction rope 130 from deviating.

[0063] The traction mechanism of this embodiment further includes a first rotating part 140 and a second rotating part 150. Figure 7~Figure 10 As shown. The first rotating part 140 and the second rotating part 150 are components that can rotate under the drive of an external force. Exemplarily, the external force is the driving force when the dial wheel 110 rotates or the tension on the traction rope caused by the bending of the active bending section 210. Specifically, the distal ends of the first traction rope 120 and the second traction rope 130 are fixedly connected to the distal end of the active bending section 210, and the proximal ends are respectively wound around the two sides of the dial wheel 110, and the proximal ends of the first traction rope 120 and the second traction rope 130 are respectively fixed to the first rotating part 140 and the second rotating part 150, as shown. Figure 7~Figure 10 shown.

[0064] In some embodiments, the first rotating portion 140 and the second rotating portion 150 are rotatably connected to the dial 110, so that the first rotating portion 140 and the second rotating portion 150 can rotate along with the dial 110 or not along with the rotation of the dial 110. Whether the first rotating portion 140 and the second rotating portion 150 rotate is determined based on the force applied to the first rotating portion 140 and the second rotating portion 150.

[0065] Specifically, based on the rotation of the dial 110, the first rotating part 140 and the second rotating part 150 have at least a first state and a second state. In the first state, the first rotating part 140 and the second rotating part 150 rotate in the same direction as the dial 110. Figure 7 or Figure 8 In the second state, one of the first rotating part 140 and the second rotating part 150 rotates in the same direction as the dial 110, and the other remains fixed, as shown in FIG. Fig.10 shown. Fig. 9It is shown that the first rotating portion 140 and the second rotating portion 150 are in a critical state between the first state and the second state.

[0066] Exemplarily, when the dial 110 rotates counterclockwise and the first rotating part 140 and the second rotating part 150 are in the first state, the first rotating part 140 and the second rotating part 150 also rotate counterclockwise; when the dial 110 rotates counterclockwise and the first rotating part 140 and the second rotating part 150 are in the second state, the first rotating part 140 rotates counterclockwise and the second rotating part 150 remains fixed.

[0067] Exemplarily, when the dial 110 rotates clockwise and the first rotating part 140 and the second rotating part 150 are in the first state, the first rotating part 140 and the second rotating part 150 also rotate clockwise; when the dial 110 rotates clockwise and the first rotating part 140 and the second rotating part 150 are in the second state, the first rotating part 140 remains fixed and the second rotating part 150 rotates clockwise.

[0068] In some embodiments, the thumbwheel 110 has a notch 111, and the first rotating portion 140 and the second rotating portion 150 are respectively disposed at two ends of the notch 111, and the first rotating portion 140 and the second rotating portion 150 are located on the rotation path of the thumbwheel 110. Figure 7 to Figure 12 Taking this structure as an example, the following describes the power source of the first rotating part 140 and the second rotating part 150 when the thumbwheel 110 rotates counterclockwise.

[0069] like Figure 7 and Figure 8 As shown, when the thumbwheel 110 rotates counterclockwise, since the first rotating part 140 and the second rotating part 150 are located on the rotation path of the thumbwheel 110, the first rotating part 140 can be driven to rotate in the same direction as the thumbwheel 110 by the rotation of the thumbwheel 110, and the rotation of the first rotating part 140 can drive the first traction rope 120 to move toward the proximal end, and the movement of the first traction rope 120 causes the active bending section 210 to bend; the bending of the active bending section 210 applies a pulling force to the second traction rope 130, causing the second traction rope 130 to move toward the distal end. Since the second traction rope 130 is in a taut state, the movement of the second traction rope 130 toward the distal end can pull the second rotating part 150 to move, so that the second rotating part 150 can also rotate in the same direction as the thumbwheel 110. This stage is the first stage of the bending of the active bending section 210.

[0070] like Fig. 9As shown, when the thumbwheel 110 rotates to a critical position where both the first traction rope 120 and the second traction rope 130 are subjected to the pulling force brought by the rotation of the thumbwheel 110, the thumbwheel 110 continues to rotate counterclockwise, and the rotation of the thumbwheel 110 can continue to drive the first rotating portion 140 to rotate in the same direction as the thumbwheel 110. The rotation of the first rotating portion 140 can drive the first traction rope 120 to continue to move toward the proximal end, and the movement of the first traction rope 120 causes the active bending section 210 to continue to bend; the bending of the active bending section 210 applies a pulling force to the second traction rope 130, causing the second traction rope 130 to continue to bend. 0 moves to the distal end. Since the second traction rope 130 is redundant in the first stage of the bending of the active bending section 210, the bending of the active bending section 210 applies tension to the second traction rope 130. The redundancy of the second traction rope 130 can be used to enable the second traction rope 130 to adapt to the continued bending of the active bending section 210. Since the second traction rope 130 is in a non-tightened state, the proximal end of the second traction rope 130 is not subjected to the tension caused by the bending of the active bending section 210, and cannot drive the second rotating part 150 to move. That is, the second rotating part 150 remains fixed. Fig. 9 and Fig.10 shown.

[0071] From the above analysis, it can be known that in the traction mechanism in the related art, the active bending section 210 only has the first stage of the bending process. When the thumbwheel 110 rotates to the critical position where the first traction rope 120 and the second traction rope 130 are both subjected to the pulling force caused by the rotation of the thumbwheel 110, even if the thumbwheel 110 continues to rotate, the active bending section 210 will not continue to bend. However, in the traction mechanism of this embodiment, through the arrangement of the first rotating part 140 and the second rotating part 150, even if the thumbwheel 110 rotates to the critical position where the first traction rope 120 and the second traction rope 130 are both subjected to the pulling force caused by the rotation of the thumbwheel 110, the thumbwheel 110 continues to rotate, and the active bending section 210 can still continue to bend the moving angle.

[0072] Similarly, when the thumbwheel 110 rotates clockwise, the first rotating portion 140 and the second rotating portion 150 still have different power sources for rotation, which will not be described in detail herein.

[0073] In the traction mechanism of this embodiment, when the thumbwheel 110 rotates to the critical position where both the first traction rope 120 and the second traction rope 130 are subjected to the tension caused by the rotation of the thumbwheel 110, the proximal end of the traction rope that should not be subjected to the tension caused by the rotation of the thumbwheel 110 is separated from the thumbwheel 110, so that when the thumbwheel 110 continues to rotate, only the distal end of the traction rope is subjected to the tension caused by the bending of the active bending section 210. By utilizing the redundancy of the traction rope during the first stage of bending of the active bending section 210, the traction rope can continue to move with the active bending section 210 under the action of the bending tension of the active bending section 210, and the proximal end thereof will not be subjected to the reverse tension caused by the rotation of the thumbwheel 110, so as to ensure that the extreme bending angle of the active bending section 210 is not affected when the size of the thumbwheel 110 is reduced.

[0074] It can be seen that in the traction mechanism of this embodiment, when the dial 110 rotates to the critical position where the first traction rope 120 and the second traction rope 130 are both subjected to the pulling force brought by the rotation of the dial 110, the critical position is not the limit position of the rotation of the dial 110. At this time, continuing to turn the dial 110 can still make the active bending section 210 continue to bend, thereby ensuring that the limit bending angle of the active bending section 210 is not affected when the size of the dial 110 is reduced, which is conducive to the miniaturization of the handle 300.

[0075] On the other hand, the traction mechanism of this embodiment also has the advantage of high reliability. Specifically, the proximal ends of the first traction rope 120 and the second traction rope 130 are respectively fixed to the first rotating part 140 and the second rotating part 150, and the first rotating part 140 and the second rotating part 150 are located on the rotation path of the dial 110. When the dial 110 switches between clockwise rotation and counterclockwise rotation, the reliability of the dial 110 driving the first rotating part 140 or the second rotating part 150 to move can be ensured, thereby ensuring the reliability of the movement of the first traction rope 120 and the second traction rope 130, and avoiding the problem that the dial 110 cannot drive the first traction rope 120 or the second traction rope 130 to rotate after the rotation direction of the dial 110 is switched multiple times.

[0076] In some embodiments, the two ends of the thumbwheel 110 are respectively a first end surface 112 and a second end surface 113. Fig.11 and Fig.12 When the active bending section 210 of the endoscope is in a straight state, the first rotating portion 140 is in surface contact with the first end surface 112, and the second rotating portion 150 is in surface contact with the second end surface 113, as shown in FIG. Figure 7 or Figure 8In the solution of this embodiment, the first rotating part 140 is in surface contact with the first end surface 112, and the second rotating part 150 is in surface contact with the second end surface 113. When the dial 110 drives the first rotating part 140 or the second rotating part 150 to move, the consistency and reliability of the rotation of the first rotating part 140 or the second rotating part 150 and the dial 110 can be improved.

[0077] In some embodiments, the first rotating portion 140 includes a first plate 141 and a first mounting portion 142. Fig.13 The proximal end of the first traction rope 120 is fixed on the first plate 141, and the first mounting portion 142 can be rotatably mounted on the dial wheel 110, as shown. Figure 7~Figure 10 In the solution of this embodiment, the first rotating part 140 can be in surface contact with the first end surface 112 through the first plate body 141, thereby improving the consistency and reliability of the rotation of the first rotating part 140 and the dial 110. On the other hand, the proximal end of the first traction rope 120 is fixed to the first plate body 141, and the movement of the first traction rope 120 can drive the first plate body 141 to move.

[0078] In some embodiments, the second rotating portion 150 includes a second plate 151 and a second mounting portion 152. Fig.14 The proximal end of the second traction rope 130 is fixed on the second plate 151, and the second mounting portion 152 can be rotatably mounted on the dial wheel 110, as shown. Figure 7~Figure 10 In the solution of this embodiment, the second rotating part 150 can be in surface contact with the second end surface 113 through the second plate body 151, thereby improving the consistency and reliability of the rotation of the second rotating part 150 and the dial wheel 110. On the other hand, the proximal end of the second traction rope 130 is fixed to the second plate body 151, and the movement of the second traction rope 130 can drive the second plate body 151 to move.

[0079] In some embodiments, the first mounting portion 142 and the second mounting portion 152 are collar structures, and the first mounting portion 142 and the second mounting portion 152 are coaxially arranged with the thumbwheel 110. Specifically, the first mounting portion 142 and the second mounting portion 152 are sleeved on the mounting seat 115 formed by the fixing hole 114 on the thumbwheel 110. In the scheme of this embodiment, the compactness of the traction mechanism layout can be improved, and the consistency and reliability of the rotation of the first rotating portion 140 or the second rotating portion 150 and the thumbwheel 110 can be further improved.

[0080] In some embodiments, the proximal end of the first traction rope 120 is welded or bonded to the first plate 141, and the proximal end of the second traction rope 130 is welded or bonded to the second plate 151. Fixing the proximal ends of the first traction rope 120 and the second traction rope 130 by welding or bonding has the advantage of convenient installation and fixing.

[0081] In some embodiments, the first plate 141 is provided with a first mounting hole 1411, such as Fig.13 The first traction rope 120 passes through the first mounting hole 1411, and a first blocking portion 121 is provided at the proximal end of the first traction rope 120. The size of the first blocking portion 121 is larger than the aperture of the first mounting hole 1411. Figure 7~Figure 10 As shown, the extending directions of the first blocking portion 121 and the first pulling rope 120 are respectively located on two sides of the first plate body 141 .

[0082] The proximal end of the first traction rope 120 is fixed to the first plate 141 by welding or bonding. Usually, the welding point or bonding point is small. When the first traction rope 120 is subjected to a large pulling force, it is easy to fall off. In the solution of this embodiment, the proximal end of the first traction rope 120 and the first blocking part 121 can also be welded or bonded. However, due to the large size of the first blocking part 121, the reliability of the connection between the first traction rope 120 and the first blocking part 121 can be increased. When the bending of the active bending section 210 generates a pulling force on the first traction rope 120, the blocking of the first blocking part 121 can prevent the proximal end of the first traction rope 120 from falling off.

[0083] In some embodiments, the second plate 151 is provided with a second mounting hole 1511, such as Fig.14 The second traction rope 130 passes through the second mounting hole 1511, and a second blocking portion 131 is disposed at the proximal end of the second traction rope 130. The size of the second blocking portion 131 is larger than the aperture of the second mounting hole 1511. Figure 7~Figure 10 As shown, the second blocking portion 131 and the extension direction of the second traction rope 130 are respectively located on both sides of the second plate 151. Similarly, when the bending of the active bending section 210 generates tension on the second traction rope 130, the blocking of the second blocking portion 131 can prevent the proximal end of the second traction rope 130 from falling off.

[0084] In some embodiments, the traction mechanism further includes a driving member 160, such as Figure 7 or Figure 8 The driving member 160 includes a toggle member 161 and a fixed shaft 162. Figure 7 or Figure 8 The fixed shaft 162 is fixedly connected to the dial wheel 110, and the fixed shaft 162 is also fixedly connected to the dial member 161, as shown. Figure 7 or Figure 8 As shown. Exemplarily, the toggle member 161 is a toggle rod or a knob. By toggling the toggle member 161, the fixed shaft 162 can be driven to rotate, and then the dial wheel 110 can be driven to rotate.

[0085] In some embodiments, the dial 110 is provided with a fixing hole 114, the fixing hole 114 is used to install the fixing shaft 162, and the fixing hole 114 is fixedly connected to the fixing shaft 162, such as Figure 7 to Figure 12 As shown. Exemplarily, the fixing hole 114 and the fixing shaft 162 are engaged with each other, so that the fixing shaft 162 is fixedly connected to the fixing hole 114 .

[0086] In some embodiments, the fixing hole 114 protrudes from the dial 110, and the outer wall of the fixing hole 114 is formed as a mounting seat 115. Fig.12 The mounting seat 115 is used to mount the first rotating part 140 and the second rotating part 150. Mounting the first rotating part 140 and the second rotating part 150 on the mounting seat 115 formed by the fixing hole 114 is conducive to improving the compactness of the traction mechanism structure.

[0087] A second aspect of this embodiment provides a handle.

[0088] The handle of this embodiment includes a housing and a traction mechanism 100. The housing is used to install the traction mechanism 100, and the traction mechanism 100 is a traction mechanism of any technical solution in this embodiment, such as Figure 6 Specifically, the pull wheel 110, the first traction rope 120, the second traction rope 130, the first rotating part 140 and the second rotating part 150 of the traction mechanism are located in the accommodation space formed by the shell; the toggle member 161 of the traction mechanism is located outside the shell, as shown in FIG. Figure 6 As shown, it is convenient for the operator to operate the thumbwheel 110 to rotate.

[0089] Without limitation thereto, a traction rope fixing portion, a wiring harness and other structures are also provided in the shell, and the remaining structures on the shell may be the same as those in the prior art and will not be described in detail here.

[0090] The handle of this embodiment has the traction mechanism of any one of the technical solutions in this embodiment, so that the handle can be miniaturized and the convenience of holding and operating by the user can be improved.

[0091] A third aspect of this embodiment provides an endoscope.

[0092] The endoscope of this embodiment includes an insertion portion 200 and a handle 300, and the handle 300 is connected to the insertion portion 200. Figure 6 The inserting portion 200 includes an active bending section 210 and a passive bending section 220 connected to each other. Figure 6 The handle 300 is a handle of any technical solution in this embodiment. The structure of the insertion part 200 can be the same as that of the prior art, and will not be described in detail here.

[0093] The endoscope of this embodiment can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. This embodiment does not specifically limit the type of the endoscope.

[0094] The endoscope of this embodiment has a handle according to any one of the technical solutions in this embodiment, which can realize the miniaturization of the endoscope handle to improve the convenience of the user's holding operation; at the same time, it can also ensure that the maximum bending angle of the active bending section is not affected.

[0095] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0096] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0097] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A traction mechanism, used on an endoscope, characterized in that: The traction mechanism comprises a thumbwheel (110), a first traction rope (120) and a second traction rope (130) wound around two sides of the thumbwheel (110), and the traction mechanism further comprises a first rotating part (140) and a second rotating part (150), wherein: The distal ends of the first traction rope (120) and the second traction rope (130) are fixedly connected to the distal end of the active bending section (210) of the endoscope, and the proximal ends are respectively fixed to the first rotating part (140) and the second rotating part (150), and the first rotating part (140) and the second rotating part (150) are rotationally connected to the thumbwheel (110), and based on the rotation of the thumbwheel (110), the first rotating part (140) and the second rotating part (150) have at least a first state and a second state. In the first state, the first rotating part (140) and the second rotating part (150) rotate in the same direction as the thumbwheel (110); in the second state, one of the first rotating part (140) and the second rotating part (150) rotates in the same direction as the thumbwheel (110), and the other remains fixed, and the one that remains fixed is the one that is fixedly connected to the first traction rope (120) or the second traction rope (130) on the side away from the bending direction of the active bending section (210).

2. The traction mechanism according to claim 1, characterized in that: The thumbwheel (110) has a notch (111), the first rotating part (140) and the second rotating part (150) are respectively arranged at two ends of the notch (111), and the first rotating part (140) and the second rotating part (150) are located on a rotation path of the thumbwheel (110).

3. The traction mechanism according to claim 2, characterized in that: The two ends of the thumbwheel (110) are respectively a first end face (112) and a second end face (113); when the active bending section (210) of the endoscope is in a straightened state, the first rotating portion (140) is in surface contact with the first end face (112), and the second rotating portion (150) is in surface contact with the second end face (113).

4. The traction mechanism according to claim 3, characterized in that: The first rotating part (140) comprises a first plate body (141) and a first mounting part (142), the proximal end of the first traction rope (120) is fixed on the first plate body (141), and the first mounting part (142) is rotatably mounted on the thumbwheel (110); The second rotating part (150) comprises a second plate body (151) and a second mounting part (152), the proximal end of the second traction rope (130) is fixed on the second plate body (151), and the second mounting part (152) is rotatably mounted on the thumbwheel (110).

5. The traction mechanism according to claim 4, characterized in that: The first mounting portion (142) and the second mounting portion (152) are ring structures, and the first mounting portion (142) and the second mounting portion (152) are both coaxially arranged with the thumbwheel (110).

6. The traction mechanism according to claim 4, characterized in that: A first mounting hole (1411) is provided on the first plate body (141), the first traction rope (120) passes through the first mounting hole (1411), a first blocking portion (121) is provided at the proximal end of the first traction rope (120), and the size of the first blocking portion (121) is larger than the aperture of the first mounting hole (1411); A second mounting hole (1511) is provided on the second plate body (151), and the second traction rope (130) passes through the second mounting hole (1511). A second blocking portion (131) is provided at the proximal end of the second traction rope (130), and the size of the second blocking portion (131) is larger than the aperture of the second mounting hole (1511).

7. The traction mechanism according to any one of claims 1 to 6, characterized in that: It also comprises a driving member (160), the driving member (160) comprising a toggle member (161) and a fixed shaft (162), wherein the fixed shaft (162) is fixedly connected to the dial wheel (110), and the fixed shaft (162) is also fixedly connected to the toggle member (161).

8. The traction mechanism according to claim 7, characterized in that: The thumbwheel (110) is provided with a fixing hole (114), the fixing hole (114) being used to install the fixing shaft (162), and the fixing hole (114) is fixedly connected to the fixing shaft (162); The fixing hole (114) protrudes from the thumbwheel (110), and the outer wall of the fixing hole (114) is formed into a mounting seat (115), and the mounting seat (115) is used to mount the first rotating part (140) and the second rotating part (150).

9. A handle, characterized in that: It comprises a housing and a traction mechanism (100), wherein the housing is used to install the traction mechanism (100), and the traction mechanism (100) is the traction mechanism according to any one of claims 1 to 8.

10. An endoscope, characterized in that: The invention comprises an insertion part (200) and a handle (300), wherein the handle (300) is connected to the insertion part (200), wherein the insertion part (200) comprises an active bending section (210) and a passive bending section (220) connected to each other, and the handle (300) is the handle according to claim 9.

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