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, wherein a receiving groove is provided on the circumferential side wall of the thumbwheel, a first stroke adjustment part and a second stroke adjustment part are provided in the receiving groove, and the first stroke adjustment part and the second stroke adjustment part are symmetrically arranged; the distal end of the first traction rope and the distal end of the second traction rope are fixedly connected to the distal end of the active bending section of the endoscope, the proximal end of the first traction rope and the proximal end of the second traction rope are fixed in the receiving groove, and the first stroke adjustment part is located on the moving path of the first traction rope, and the second stroke adjustment part is located on the moving path of the second traction rope. The traction mechanism of the present invention can adjust the stroke of the first traction rope or the second traction rope through the first stroke adjustment part or the second stroke adjustment part, thereby shortening the delay time when the active bending section returns to a straight state or reverse bending.

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] In the related art, the distal end of the insertion portion of the endoscope is an active bending section, a traction rope is provided in the handle, the distal end of the traction rope is connected to the active bending section, the proximal end is fixed to 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, and by turning the dial piece, the two traction ropes can be moved synchronously in different directions, so that the active bending section of the insertion portion is bent.

[0005] However, the inventors discovered during their research that, in the endoscope of the related art, when the active bending section bends, the traction rope driven by the dial wheel can always remain in a tensioned state, while the other traction rope becomes relaxed and is in a non-tensioned state; when the dial wheel rotates in the opposite direction, since one of the traction ropes is in a relaxed state, the active bending section will be delayed in returning to a straight state or bending in the opposite direction.

[0006] Therefore, during the bending process of the active bending segment, how to shorten the delay time when the active bending segment returns to a straight state or reversely bends 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 that an active bending section of an endoscope in the related art has a delay when recovering to a straight state or bending in the reverse direction.

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

[0009] A first aspect of the present invention discloses 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, wherein a receiving groove is provided on the circumferential side wall of the thumbwheel, a first stroke adjustment portion and a second stroke adjustment portion are provided in the receiving groove, and the first stroke adjustment portion and the second stroke adjustment portion are symmetrically arranged; the distal ends of the first traction rope and the distal ends of the second traction rope are fixedly connected to the distal end of the active bending section of the endoscope, the proximal ends of the first traction rope and the proximal ends of the second traction rope are fixed in the receiving groove, and the first stroke adjustment portion is located on the moving path of the first traction rope, and the second stroke adjustment portion is located on the moving path of the second traction rope.

[0011] According to an optional embodiment, the first stroke adjusting portion and the second stroke adjusting portion are slotted structures, and the moving stroke of the first traction rope or the second traction rope is reduced by the first stroke adjusting portion or the second stroke adjusting portion; or the first stroke adjusting portion and the second stroke adjusting portion are raised structures, and the moving stroke of the first traction rope or the second traction rope is increased by the first stroke adjusting portion or the second stroke adjusting portion.

[0012] According to an optional embodiment, an arc portion is between the first stroke adjustment portion and the second stroke adjustment portion, the first traction rope is fixedly connected to the arc portion to form a first fixed point, and the second traction rope is fixedly connected to the arc portion to form a second fixed point.

[0013] According to an optional embodiment, when the active bending section is bent to an extreme angle, the first fixed point is located at the proximal end of the first separation point, or the second fixed point is located at the proximal end of the second separation point, wherein the first separation point is the position where the first traction rope is separated from the thumbwheel when the active bending section is in a straight state, and the second separation point is the position where the second traction rope is separated from the thumbwheel when the active bending section is in a straight state.

[0014] According to an optional embodiment, the length of the first traction rope in the receiving groove satisfies: L1≤1 / 2L, and the length of the second traction rope in the receiving groove satisfies: L2≤1 / 2L; or the length of the first traction rope in the receiving groove satisfies: L1>1 / 2L, and the length of the second traction rope in the receiving groove satisfies: L2>1 / 2L; wherein, L1 is the length of the first traction rope in the receiving groove, L2 is the length of the second traction rope in the receiving groove, and L is the circumference of the receiving groove.

[0015] According to an optional embodiment, when L1>1 / 2L, L2>1 / 2L, the accommodating groove includes a first accommodating groove and a second accommodating groove, and the first accommodating groove and the second accommodating groove are distributed along the axial direction of the thumbwheel, and the first accommodating groove and the second accommodating groove are used to accommodate the first traction rope and the second traction rope, respectively.

[0016] According to an optional embodiment, the first accommodating groove and the second accommodating groove are both spiral structures, and the spiral directions of the first accommodating groove and the second accommodating groove are opposite; the traction mechanism also includes a fixed shaft and a knob, the fixed shaft is fixedly connected to the dial wheel, the fixed shaft is also fixedly connected to the knob, and based on the rotation of the knob, the fixed shaft moves along the radial direction of the shell of the endoscope.

[0017] According to an optional embodiment, the fixing shaft is threadedly connected to the housing of the endoscope.

[0018] A second aspect of the present invention discloses 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 discloses 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] The traction mechanism of the present invention is provided with a first stroke adjustment portion and a second stroke adjustment portion in the accommodating groove. When the active bending section is bending, the stroke of the first traction rope can be reduced by the first stroke adjustment portion, or the stroke of the second traction rope can be reduced by the second stroke adjustment portion; or when the active bending section is bending, the stroke of the first traction rope can be increased by the first stroke adjustment portion, or the stroke of the second traction rope can be increased by the second stroke adjustment portion, so as to reduce the redundancy of the first traction rope or the second traction rope during the bending of the active bending section, thereby shortening the delay time when the active bending section returns to a straight state or reverses bending.

[0024] It can be seen that the traction mechanism of the present invention can shorten the delay time when the active bending section returns to the straight state or reverses bending through the provision of the first stroke adjustment part and the second stroke adjustment part. 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 schematic diagram of the fixed point of the second traction rope rotating to the separation point 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 It is a principle diagram of the cooperation between the thumbwheel and the first traction rope and the second traction rope in the first embodiment of the present application;

[0033] Figure 8 It is a principle diagram of the cooperation between the thumbwheel and the first traction rope and the second traction rope in the second embodiment of the present application;

[0034] Fig. 9 It is a schematic diagram of the cooperation between the thumbwheel and the first traction rope and the second traction rope in the first embodiment of the present application;

[0035] Fig.10 is a schematic diagram of a thumbwheel according to a first embodiment of the present application;

[0036] Fig.11 It is a schematic diagram of the cooperation between the thumbwheel and the first traction rope and the second traction rope in the second embodiment of the present application;

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

[0038] Fig.13 It is a schematic diagram of the cooperation between the thumbwheel and the first traction rope and the second traction rope in the third embodiment of the present application;

[0039] Fig.14is a schematic diagram of a thumbwheel according to a third embodiment of the present application;

[0040] Fig.15 It is a schematic diagram of the thumbwheel of the fourth embodiment of the present application.

[0041] In the figure: 110, dial wheel; 110a, first wheel disc; 110b, second wheel disc; 111, receiving groove; 1111, first receiving groove; 1112, second receiving groove; 112, first stroke adjustment part; 113, second stroke adjustment part; 120, first traction rope; 121, first fixing point; 122, first separation point; 130, second traction rope; 131, second fixing point; 132, second separation point; 140, fixed axis; 141, first thread; 150, knob; 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

[0042] 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.

[0043] 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.

[0044] 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".

[0045] Figure 1 FIG. 1 shows a schematic diagram of 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 joint 211 of the active bending section 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 121 and the second fixing point 131, respectively. Figure 1 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 be turned to 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.

[0046] The inventors also found in their research that when the dial 110 rotates 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 rotates 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.

[0047] 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.

[0048] 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.

[0049] 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 4As 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.

[0050] 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, that is, the traction rope is not in contact with the inner wall surface of the snake bone joint 211. 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 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 two adjacent snake bone joints 211 increases, such as Figure 5 shown.

[0051] 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.

[0052] 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.

[0053] Second aspect: during the bending process of the active bending section 210, the unbalanced force on the traction rope causes redundancy.

[0054] The distal ends of the first traction rope 120 and the second traction rope 130 are connected to the last 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 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 applied by the first traction rope 120 is greater than the tension applied by the second traction rope 130; in addition, there is a time sequence in which the proximal end of the first traction rope 120 is subjected to the force of the dial wheel 110 and the distal end of the second traction rope 130 is subjected to the force of the active bending section 210, therefore, in this case, the second traction rope 130 may also be redundant.

[0055] In the traction mechanism of the present application, a stroke adjustment part is provided on the thumbwheel 110. When the active bending section 210 is bent, the stroke of the first traction rope 120 or the second traction rope 130 (that is, the length of movement of the first traction rope 120 or the second traction rope 130) can be reduced by the stroke adjustment part; or when the active bending section 210 is bent, the stroke of the first traction rope 120 or the second traction rope 130 can be increased by the stroke adjustment part to reduce the redundancy of the first traction rope 120 or the second traction rope 130 during the bending process of the active bending section 210, thereby shortening the delay time when the active bending section 210 returns to a straight state or reverses.

[0056] The following is combined with Figures 6 to 15 , the traction mechanism, handle and endoscope provided in the present application are described in detail through specific embodiments and their application scenarios.

[0057] The first aspect of this embodiment provides a detailed description of the traction mechanism of the present application.

[0058] 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 distal end of the insertion part 200 has an active bending section 210, and the distal end surface of the active bending section 210 is provided with a camera module and other structures. A traction mechanism is provided in the handle 300, and the traction mechanism is used to adjust the bending angle of the active bending section 210.

[0059] 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 9 , Fig.11 and Fig.13 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 9 , Fig.11 and Fig.13 shown.

[0060] In some embodiments, a receiving groove 111 is provided on the circumferential side wall of the thumbwheel 110. Figure 9~Figure 15 The proximal ends of the first traction rope 120 and the second traction rope 130 are located in the receiving groove 111, so that when the first traction rope 120 and the second traction rope 130 move, the receiving groove 111 can play a guiding and limiting role.

[0061] In some embodiments, the receiving groove 111 is provided with a first stroke adjustment portion 112 and a second stroke adjustment portion 113. Figure 7 to Figure 15 As shown. The first stroke adjustment part 112 and the second stroke adjustment part 113 are symmetrically arranged. The distal end of the first traction rope 120 and the distal end of the second traction rope 130 are fixedly connected to the distal end of the active bending section 210 of the endoscope, and the proximal end of the first traction rope 120 and the proximal end of the second traction rope 130 are fixed in the receiving groove 111, and the first stroke adjustment part 112 is located on the moving path of the first traction rope 120, and the second stroke adjustment part 113 is located on the moving path of the second traction rope 130, so that the stroke of the first traction rope 120 is adjusted by the first stroke adjustment part 112, and the stroke of the second traction rope 130 is adjusted by the second stroke adjustment part 113.

[0062] like Figure 7 As shown, the first stroke adjustment part 112 is located on the moving path of the first traction rope 120, and the second stroke adjustment part 113 is located on the moving path of the second traction rope 130, which means that: when the dial 110 rotates counterclockwise, the second stroke adjustment part 113 can be located at the initial second separation point 132 after rotating a certain angle; when the dial 110 rotates clockwise, the first stroke adjustment part 112 can be located at the initial first separation point 122 after rotating a certain angle.

[0063] Exemplarily, the first stroke adjustment portion 112 is located between the first fixed point 121 and the first separation point 122, so that the first stroke adjustment portion 112 can be located on the moving path of the first traction rope 120, such as Figure 7 or Figure 8 Similarly, the second stroke adjustment portion 113 is located between the second fixed point 131 and the second separation point 132, so that the second stroke adjustment portion 113 can be located on the moving path of the second traction rope 130, as shown in FIG. Figure 7 or Figure 8 shown.

[0064] In some embodiments, the first stroke adjustment portion 112 and the second stroke adjustment portion 113 may be formed as a part of the accommodating groove 111, that is, the first stroke adjustment portion 112 and the second stroke adjustment portion 113 are an integrated structure with the accommodating groove 111, so that the rotation of the dial 110 can drive the first stroke adjustment portion 112 and the second stroke adjustment portion 113 to rotate synchronously.

[0065] In some embodiments, the first stroke adjustment portion 112 and the second stroke adjustment portion 113 are a component disposed on the receiving groove 111, that is, the first stroke adjustment portion 112 and the second stroke adjustment portion 113 are a separate structure from the receiving groove 111. The first stroke adjustment portion 112 and the second stroke adjustment portion 113 are fixed in the receiving groove 111, so that the rotation of the dial 110 can drive the first stroke adjustment portion 112 and the second stroke adjustment portion 113 to rotate synchronously.

[0066] In some embodiments, the first stroke adjustment portion 112 and the second stroke adjustment portion 113 are notch structures. Exemplarily, the notch structure is formed by the receiving groove 111. Figure 9~Figure 15 As shown, the notch structure is a notch on the receiving groove 111; or a part of the receiving groove 111 is concave to form a notch structure. The notch structure can be a linear, arc-shaped, folded line, etc. structure, which is not limited here.

[0067] For example, Figure 7 As shown, when the thumbwheel 110 rotates counterclockwise, if the first traction rope 120 is driven to move by the rotation force of the thumbwheel 110, the second traction rope 130 is moved by the pulling force of the active bending section 210. In this process, the first stroke adjustment part 112 is located in front of the moving path of the first traction rope 120, and the first stroke adjustment part 112 has no effect on the moving path of the first traction rope 120.

[0068] Specifically, the first traction rope 120 moves around the arc portion of the dial 110, and the moving path of the first traction rope 120 is an arc. The second stroke adjustment portion 113 is located on the moving path of the second traction rope 130. Since the distance between the second stroke adjustment portion 113 and the center point of the dial 110 is smaller than the distance between the arc structure and the center point, the stroke of the second traction rope 130 moving around the second stroke adjustment portion 113 is smaller than the stroke of moving around the arc portion. In other words, the moving stroke of the second traction rope 130 is smaller than the moving stroke of the first traction rope 120, thereby reducing the redundancy of the second traction rope 130. Similarly, when the dial 110 rotates clockwise, the first stroke adjustment portion 112 can make the moving stroke of the first traction rope 120 smaller than the moving stroke of the second traction rope 130, thereby reducing the redundancy of the first traction rope 120.

[0069] In some embodiments, the first stroke adjustment portion 112 and the second stroke adjustment portion 113 are raised structures. Exemplarily, the raised structure is formed by the accommodating groove 111. The raised structure may be in an arc-shaped or broken line-shaped structure, which is not limited here. Similar to the above scheme, during the counterclockwise rotation of the dial wheel 110, the moving stroke of the first traction rope 120 can be increased by the first stroke adjustment portion 112, and the moving stroke of the second traction rope 130 is also made smaller than the moving stroke of the first traction rope 120, thereby reducing the redundancy of the second traction rope 130; or during the clockwise rotation of the dial wheel 110, the moving stroke of the second traction rope 130 can be increased by the second stroke adjustment portion 113, and the moving stroke of the first traction rope 120 is also made smaller than the moving stroke of the second traction rope 130, thereby reducing the redundancy of the first traction rope 120.

[0070] In the traction mechanism of this embodiment, a first stroke adjustment portion 112 and a second stroke adjustment portion 113 are provided in the accommodating groove 111. When the active bending section 210 is bent, the stroke of the first traction rope 120 can be reduced by the first stroke adjustment portion 112, or the stroke of the second traction rope 130 can be reduced by the second stroke adjustment portion 113; or when the active bending section 210 is bent, the stroke of the first traction rope 120 can be increased by the first stroke adjustment portion 112, or the stroke of the second traction rope 130 can be increased by the second stroke adjustment portion 113, so as to reduce the redundancy of the first traction rope 120 or the second traction rope 130 during the bending process of the active bending section 210, thereby shortening the delay time when the active bending section 210 returns to a straight state or reverses.

[0071] It can be seen that the traction mechanism of this embodiment can shorten the delay time when the active bending section 210 returns to the straight state or reverse bending through the provision of the first stroke adjustment portion 112 and the second stroke adjustment portion 113.

[0072] In some embodiments, an arc portion is formed between the first stroke adjustment portion 112 and the second stroke adjustment portion 113, the first traction rope 120 is fixedly connected to the arc portion to form a first fixed point 121, and the second traction rope 130 is fixedly connected to the arc portion to form a second fixed point 131. Figure 7 or Figure 8 As shown. For example, Figure 7 or Figure 8 As shown, there are two arc-shaped portions between the first stroke adjustment portion 112 and the second stroke adjustment portion 113 , and the first fixing point 121 and the second fixing point 131 may be located on any one of the two arc-shaped portions.

[0073] In some embodiments, when the active bending section 210 is bent to the limit angle, the first fixing point 121 is located at the proximal end of the first separation point 122, or the second fixing point 131 is located at the proximal end of the second separation point 132. The first separation point 122 is the position where the first traction rope 120 is separated from the dial wheel 110 when the active bending section 210 is in the straight state, and the second separation point 132 is the position where the second traction rope 130 is separated from the dial wheel 110 when the active bending section 210 is in the straight state. Figure 7 or Figure 8 That is, when the thumbwheel 110 rotates counterclockwise and the active bending section 210 bends to the limit angle, the second fixed point 131 has not yet reached the second separation point 132; when the thumbwheel 110 rotates clockwise and the active bending section 210 bends to the limit angle, the first fixed point 121 has not yet reached the first separation point 122.

[0074] The inventors have found in their research that when the dial 110 rotates to the point where the first fixed point 121 is located at the first separation point 122, or the second fixed point 131 is located at the second separation point 132, the traction rope may also be loosened due to the following reasons: For example, Figure 1 As shown, when the thumbwheel 110 rotates counterclockwise, the first traction rope 120 is subjected to the pulling force brought by the rotation of the thumbwheel 110, and the movement of the first traction rope 120 drives the active bending section 210 to bend; in this process, the first traction rope 120 always moves along the circumference of the thumbwheel 110, that is, the moving path of the first traction rope 120 is the arc length of the thumbwheel 110. During the bending process of the active bending section 210, the active bending section 210 also applies pulling force to the distal end of the second traction rope 130, so that the second traction rope 130 and the first traction rope 120 move synchronously in opposite directions; in this process, when the second fixed point 131 is located at the second separation point 132 (such as Figure 2 ), the second traction rope 130 is separated from the thumbwheel 110, and the moving path of the second traction rope 130 is no longer the arc length of the thumbwheel 110. At this time, the moving path of the second traction rope 130 can be regarded as a straight line (specifically, the distance sent from the second fixed point 131 to the far end), resulting in the moving stroke of the second traction rope 130 being smaller than the moving stroke of the first traction rope 120. Therefore, in this case, the second traction rope 130 may also be redundant.

[0075] In the above scheme of the present embodiment, when the active bending section 210 is bent to the extreme angle, the first fixed point 121 is located at the proximal end of the first separation point 122, which can not only solve the redundancy caused by the change of the position of the traction rope in the traction rope installation part and the unbalanced force of the traction rope during the bending process of the active bending section 210, but also avoid the redundancy of the first traction rope 120 caused by the above reasons; similarly, the second fixed point 131 is located at the proximal end of the second separation point 132, which also avoids the redundancy of the second traction rope 130 caused by the above reasons.

[0076] In some embodiments, the length of the first traction rope 120 in the receiving groove 111 satisfies: L1≤1 / 2L, and the length of the second traction rope 130 in the receiving groove 111 satisfies: L2≤1 / 2L. Figure 7 As shown. Among them, L1 is the length of the first traction rope 120 in the receiving groove 111, L2 is the length of the second traction rope 130 in the receiving groove 111, and L is the circumference of the receiving groove 111. That is, the winding length of the first traction rope 120 and the second traction rope 130 on the receiving groove 111 is shorter. This structure is suitable for endoscopes with a smaller rotation angle of the dial wheel 110.

[0077] In some embodiments, the length of the first traction rope 120 in the receiving groove 111 satisfies: L1>1 / 2L, and the length of the second traction rope 130 in the receiving groove 111 satisfies: L2>1 / 2L. Figure 8 As shown. Wherein, L1 is the length of the first traction rope 120 in the receiving groove 111, L2 is the length of the second traction rope 130 in the receiving groove 111, and L is the circumference of the receiving groove 111. That is, the winding length of the first traction rope 120 and the second traction rope 130 on the receiving groove 111 is longer. This structure can be applied to endoscopes with a larger rotation angle of the thumbwheel 110, or when the limit bending angle of the active bending section 210 is constant, the size of the thumbwheel 110 can be reduced, thereby optimizing the structure in the endoscope handle and making it possible to miniaturize the endoscope handle.

[0078] In some embodiments, when L1>1 / 2L and L2>1 / 2L, the receiving groove 111 includes a first receiving groove 1111 and a second receiving groove 1112. Fig.11 and Fig.12 The first receiving groove 1111 and the second receiving groove 1112 are distributed along the axial direction of the thumbwheel 110 , and the first receiving groove 1111 and the second receiving groove 1112 are used to receive the first traction rope 120 and the second traction rope 130 respectively.

[0079] The inventors discovered during research that when L1>1 / 2L and L2>1 / 2L, the proximal ends of the first traction rope 120 and the second traction rope 130 overlap, and when the first traction rope 120 and the second traction rope 130 move, friction is generated between the first traction rope 120 and the second traction rope 130 and hinders the smoothness of movement of the first traction rope 120 and the second traction rope 130, making it difficult to control the bending of the active bending section 210.

[0080] In the solution of this embodiment, a first accommodating groove 1111 and a second accommodating groove 1112 are provided on the thumbwheel 110, and the first accommodating groove 1111 and the second accommodating groove 1112 are respectively used to accommodate the first traction rope 120 and the second traction rope 130, so that when L1>1 / 2L and L2>1 / 2L, the problem of mutual interference between the first traction rope 120 and the second traction rope 130 during movement can be avoided.

[0081] In some embodiments, the first receiving groove 1111 and the second receiving groove 1112 are both spiral structures, such as Fig.13 and Fig.14 As shown. The spiral directions of the first receiving groove 1111 and the second receiving groove 1112 are opposite, so that the first traction rope 120 and the second traction rope 130 can be kept to move synchronously in opposite directions. In the solution of this embodiment, the first receiving groove 1111 and the second receiving groove 1112 are set as spiral structures, so that the rotation angle of the thumbwheel 110 can exceed 360°. Therefore, the rotation angle of the thumbwheel 110 can be further increased, and when the limit bending angle of the active bending section 210 is constant, the size of the thumbwheel 110 can be further reduced.

[0082] In some embodiments, the traction mechanism further includes a fixed shaft 140 and a knob 150, such as Figure 6 , Fig.11 and Fig.13 The fixed shaft 140 is fixedly connected to the thumbwheel 110 , and is also fixedly connected to the knob 150 , and based on the rotation of the knob 150 , the fixed shaft 140 moves along the radial direction of the housing of the endoscope.

[0083] Exemplarily, the fixed shaft 140 is threadedly connected to the housing of the endoscope. Fig.13 As shown, the fixed shaft 140 is provided with a first thread 141. Adaptively, a portion of the housing for mounting the fixed shaft 140 is provided with a second thread (not shown in the figure) that cooperates with the first thread 141. Exemplarily, the first thread 141 may be located only at one end of the fixed shaft 140 connected to the knob 150; the first thread 141 may also be located at both ends of the fixed shaft 140. Since the fixed shaft 140 is threadedly connected to the housing of the endoscope, when the fixed shaft 140 is controlled to rotate by the knob 150, the fixed shaft 140 can be moved in the radial direction of the housing. Since the fixed shaft 140 is also fixedly connected to the thumbwheel 110, when the fixed shaft 140 moves in the radial direction of the housing, the thumbwheel 110 can also be driven to move in the radial direction of the housing, so that the first traction rope 120 and the second traction rope 130 can always move in the spiral receiving groove 111.

[0084] In some embodiments, when the dial wheel 110 has a first receiving groove 1111 and a second receiving groove 1112, the dial wheel 110 may include a first wheel disc 110a and a second wheel disc 110b, and the first receiving groove 1111 and the second receiving groove 1112 are respectively located on the first wheel disc 110a and the second wheel disc 110b. Fig.15 Preferably, the first wheel disc 110a and the second wheel disc 110b are split structures. When assembling the first traction rope 120 and the second traction rope 130, by rotating the first wheel disc 110a and the second wheel disc 110b, the first traction rope 120 and the second traction rope 130 can be kept in a taut state in the initial state.

[0085] The second aspect of this embodiment provides a detailed description of the handle of the present application.

[0086] The handle of this embodiment includes a shell and a traction mechanism. The shell is used to install the traction mechanism, and the traction mechanism is the 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 and the fixed shaft 140 of the traction mechanism are located in the accommodation space formed by the shell; the knob 150 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.

[0087] 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.

[0088] The handle of this embodiment has the traction mechanism of any one of the technical solutions in this embodiment, so as to shorten the delay time when the active bending section 210 returns to the straight state or reverse bending, and is also conducive to the miniaturization of the handle and improves the convenience of the user's holding operation.

[0089] The third aspect of this embodiment provides a detailed description of the endoscope of the present application.

[0090] 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.

[0091] 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.

[0092] The endoscope of this embodiment has a handle according to any one of the technical solutions in this embodiment, which can shorten the delay time when the active bending section 210 returns to a straight state or reverse bending, improve the response speed of the endoscope, and also realize the miniaturization of the endoscope handle to improve the convenience of the user's holding operation.

[0093] 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.

[0094] 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.

[0095] 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), wherein a receiving groove (111) is provided on a circumferential side wall of the thumbwheel (110), a first stroke adjustment portion (112) and a second stroke adjustment portion (113) are provided in the receiving groove (111), and the first stroke adjustment portion (112) and the second stroke adjustment portion (113) are symmetrically arranged; The distal ends of the first traction rope (120) and the distal ends of the second traction rope (130) are fixedly connected to the distal end of the active bending section (210) of the endoscope, the proximal ends of the first traction rope (120) and the proximal ends of the second traction rope (130) are fixed in the accommodating groove (111), and the first stroke adjustment portion (112) is located on the moving path of the first traction rope (120), and the second stroke adjustment portion (113) is located on the moving path of the second traction rope (130); The first stroke adjustment portion (112) and the second stroke adjustment portion (113) are convex structures, the convex structures are arc-shaped or broken-line-shaped, and the moving stroke of the first traction rope (120) or the second traction rope (130) is increased by the first stroke adjustment portion (112) or the second stroke adjustment portion (113); An arc portion is provided between the first stroke adjustment portion (112) and the second stroke adjustment portion (113); the first traction rope (120) is fixedly connected to the arc portion to form a first fixing point (121); and the second traction rope (130) is fixedly connected to the arc portion to form a second fixing point (131).

2. The traction mechanism according to claim 1, characterized in that: When the active bending section (210) is bent to a limit angle, the first fixing point (121) is located at a proximal end of a first separation point (122), or the second fixing point (131) is located at a proximal end of a second separation point (132), wherein the first separation point (122) is a position where the first traction rope (120) is separated from the thumbwheel (110) when the active bending section (210) is in a straightened state. The second separation point (132) is the position where the second traction rope (130) separates from the thumbwheel (110) when the active bending section (210) is in a straightened state.

3. The traction mechanism according to claim 2, characterized in that: The length of the first traction rope (120) in the receiving groove (111) satisfies: L1≤1 / 2L, and the length of the second traction rope (130) in the receiving groove (111) satisfies: L2≤1 / 2L; Or the length of the first traction rope (120) in the receiving groove (111) satisfies: L1>1 / 2L, and the length of the second traction rope (130) in the receiving groove (111) satisfies: L2>1 / 2L; Wherein, L1 is the length of the first traction rope (120) in the receiving groove (111), L2 is the length of the second traction rope (130) in the receiving groove (111), and L is the circumference of the receiving groove (111).

4. The traction mechanism according to claim 3, characterized in that: When L1>1 / 2L and L2>1 / 2L, the accommodating groove (111) comprises a first accommodating groove (1111) and a second accommodating groove (1112), and the first accommodating groove (1111) and the second accommodating groove (1112) are distributed along the axial direction of the thumbwheel (110), and the first accommodating groove (1111) and the second accommodating groove (1112) are used to accommodate the first traction rope (120) and the second traction rope (130), respectively.

5. The traction mechanism according to claim 4, characterized in that: The first containing groove (1111) and the second containing groove (1112) are both spiral structures, and the spiral directions of the first containing groove (1111) and the second containing groove (1112) are opposite; The traction mechanism also includes a fixed shaft (140) and a knob (150), wherein the fixed shaft (140) is fixedly connected to the dial wheel (110), and the fixed shaft (140) is also fixedly connected to the knob (150), and based on the rotation of the knob (150), the fixed shaft (140) moves along the radial direction of the housing of the endoscope.

6. The traction mechanism according to claim 5, characterized in that: The fixed shaft (140) is threadedly connected to the housing of the endoscope.

7. A handle, characterized in that: The invention comprises a shell and a traction mechanism, wherein the shell is used for installing the traction mechanism, and the traction mechanism is the traction mechanism according to any one of claims 1 to 6.

8. 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 7.

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