Endoscope bending part and endoscope

Abstract

The present invention provides an endoscope bending part and an endoscope, the endoscope bending part comprises a plurality of bending pieces, two adjacent bending pieces among the plurality of bending pieces are connected on a rotating shaft, each bending piece is provided with an abutting part, and the abutting part is provided with a first surface located on the outer peripheral surface of the bending piece and a second surface located on the end surface of the bending piece. When the bending parts rotate around the rotating shaft to the maximum angle, the edge parts connecting the first surface and the second surface abut against the adjacent bending parts, and the edge parts are parallel to the rotating shaft. According to the endoscope bending part and the endoscope of the present invention, the abutting part of the bending member is a straight line, or the rotating shaft of the bending member is located on the plane where the abutting part is located, so that the abutting part is a plane, and therefore, compared with a conventional bending member, the bending part is more flexible. According to the invention, the matching stability between the bending parts and the bending stability of the bending part of the endoscope can be improved, and unexpected distortion of the bending part is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an endoscope bending part and an endoscope. Background Art

[0002] Endoscopes are commonly used medical instruments in the medical field. They can observe organs in the body cavity by inserting a long and thin insertion portion into the body cavity, and can also perform various treatments by inserting treatment instruments from the instrument channel as needed. In such an endoscope, a head end, a bending portion, and an insertion portion are sequentially arranged from the front end.

[0003] The bending portion of the endoscope includes an active bending portion that can be bent freely by a user's operation and a passive bending portion that can be bent in the up-down, left-right direction with respect to the insertion direction of the insertion portion according to an external force received.

[0004] For example, in patent document CN110944568A, a bending portion of an endoscope is described. In the bending portion of the patent document, both the active bending portion and the passive bending portion are composed of a plurality of bending members connected in series. When bending, the adjacent bending members abut against each other to maintain the bending state of the bending portion. The first rotation axis RL and the second rotation axis UD of the bending member of the active bending portion are orthogonal to each other, the third rotation axis IA1 of the bending member of the passive bending portion is tilted clockwise around the central axis O by θ3 (=90°-θ1) relative to the second rotation axis UD, and the fourth rotation axis IA2 is tilted counterclockwise around the central axis O by θ4 (=90°-θ1) relative to the second rotation axis UD. As a result, the passive bending portion is easier to bend in the up-down direction than in the left-right direction through the above-mentioned two rotation axes IA1 and IA2. In other words, the bending rigidity of the passive bending portion 15 in the left-right direction is higher than that in the up-down direction, and the maximum bending angle in the left-right direction is smaller than the maximum bending angle in the up-down direction.

[0005] However, when the bending portion of the above-mentioned patent document is bent, the bending pieces that abut against each other easily slip, causing the bending portion to be twisted, and it is impossible to maintain a desired bending shape. Summary of the invention

[0006] In view of this, in order to solve at least one of the problems existing in the above-mentioned prior art, the present invention proposes an endoscope bending portion and an endoscope, the purpose of which is to improve the bending stability of the endoscope bending portion and prevent the bending portion from being twisted unexpectedly.

[0007] In order to achieve the above-mentioned purpose, one embodiment of the present invention is an endoscope bending portion, which includes a plurality of bending pieces, two adjacent bending pieces among the plurality of bending pieces are connected on a rotating axis, and the bending piece has an abutment portion, and the abutment portion has a first surface located on the outer peripheral surface of the bending piece and a second surface located on the end surface of the bending piece. When the bending piece rotates to a maximum angle around the rotating axis, an edge portion connecting the first surface and the second surface abuts against an adjacent bending piece, and the edge portion is parallel to the rotating axis.

[0008] Preferably, in the above-mentioned bending portion of the endoscope, the second surface is a plane, and the rotation axis is located in the plane where the second surface is located.

[0009] Preferably, in the above-mentioned endoscope bending portion, the end surface further has a concave surface that is recessed in the length direction of the bending piece.

[0010] Preferably, in the above-mentioned endoscope bending portion, the first surface is a plane.

[0011] Preferably, in the above-mentioned endoscope bending portion, the rotation axis has a first rotation axis and a second rotation axis, the projection lines of the first rotation axis and the second rotation axis in the same projection plane perpendicular to the axial direction of the bending piece are orthogonal to each other, the outer peripheral surface of the bending piece has a first connection portion connecting the first rotation axis with the adjacent bending piece and a second connection portion connecting the second rotation axis with the adjacent bending piece, the first surface includes a first plane parallel to the second rotation axis and a second plane parallel to the first rotation axis, the first plane and the first connection portion are located in the same plane, and the second plane and the second connection portion are located in the same plane.

[0012] Preferably, in the above-mentioned endoscope bending portion, the rotation axis has a first rotation axis and a second rotation axis, the projection lines of the first rotation axis and the second rotation axis in the same projection plane perpendicular to the axial direction of the bending piece are orthogonal to each other, the outer peripheral surface of the bending piece has a first connection portion connecting the first rotation axis with the adjacent bending piece and a second connection portion connecting the second rotation axis with the adjacent bending piece, the first surface includes a first plane parallel to the second rotation axis and a second plane parallel to the first rotation axis, and the first plane and the first connection portion are located in different planes.

[0013] Preferably, in the above-mentioned endoscope bending portion, the second plane and the second connecting portion are located in different planes.

[0014] Preferably, in the above-mentioned bending portion of the endoscope, the inner side surface of the bending piece is a cylindrical surface.

[0015] Another embodiment of the present invention is an endoscope bending portion, which includes a plurality of bending pieces, wherein two adjacent bending pieces among the plurality of bending pieces are connected on a rotating axis, and the bending piece is provided with an abutment portion, wherein the abutment portion has a first surface located on the outer peripheral surface of the bending piece and a second surface on the end face of the bending piece, wherein the second surface is a plane, and the rotating axis is located in the plane where the second surface is located, and when the bending piece rotates to a maximum angle around the rotating axis, the second surface abuts against the adjacent bending piece.

[0016] Another embodiment of the present invention is an endoscope having any one of the endoscope bending portions described above.

[0017] Therefore, according to the endoscope bending portion and the endoscope of the present invention, the abutting portion of the bending piece is made a straight line, or the abutting portion is made a plane by making the rotation axis of the bending piece located in the plane where the abutting portion is located. Therefore, compared with the existing bending pieces, the matching stability between the bending pieces and the bending stability of the bending portion of the endoscope can be improved, thereby preventing the bending portion from being twisted unexpectedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or 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 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.

[0019] Figure 1 Schematic diagram of the endoscope of the present invention.

[0020] Figure 2 It is a partial schematic diagram of the bending portion of the present invention.

[0021] Figure 3 It is a three-dimensional schematic diagram of a bending piece according to a first embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the bending piece according to the first embodiment of the present invention observed along the length direction of the bending portion.

[0023] Figure 5 It is a schematic diagram of the cooperation between the bending parts of the first embodiment of the present invention.

[0024] Figure 6 It is a schematic three-dimensional diagram of a bending piece according to a second embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the cooperation between the bending parts of the second embodiment of the present invention.

[0026] Figure 8 It is a three-dimensional schematic diagram of a bending piece according to a third embodiment of the present invention.

[0027] Fig. 9 It is a schematic diagram of the cooperation between the bending parts of the third embodiment of the present invention.

[0028] Fig.10 It is a three-dimensional schematic diagram of a bending piece according to a first variation of the present invention.

[0029] Fig.11 It is a schematic diagram of the cooperation between the bending parts of the first variant of the present invention.

[0030] Fig.12 Schematic diagram of a bending piece according to a fourth embodiment of the present invention.

[0031] Fig.13 It is a schematic diagram of the cooperation between the bending parts according to the fourth embodiment of the present invention.

[0032] Fig.14 Schematic diagram of a bending piece according to a second variation of the present invention.

[0033] Fig.15 This is a schematic diagram of the cooperation between the bending parts of the second variant of the present invention.

[0034] Explanation of symbols

[0035] 1. Head end; 2. Bending part; 3. Insertion part; 4. Operation part; 5. Cable; 6. Connection part; 7. Rivet;

[0036] 21, 21A-21E bending parts; 211, 211A-211E first connecting parts; 212, 212A-212E second connecting parts; 213 abutting parts; 214, 214D, 214E first surfaces; 215, 215D, 215E second surfaces; 216A-216C first planes; 217A-217C second planes; 218E concave surface;

[0037] N, edge portion; R1, first rotation axis; R2, second rotation axis. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure are clearly and completely described below in conjunction with the drawings in the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0039] Figure 1It is a schematic diagram of the endoscope 1 according to the present embodiment.

[0040] like Figure 1 As shown, the endoscope 1 is provided with a head portion 1, a bending portion 2, an insertion portion 3 (sometimes, the head portion 1, the bending portion 2, and the insertion portion 3 are collectively referred to as an insertion portion), an operating portion 4 connected to the base end side of the insertion portion 3, a cable 5 extending from the operating portion 4, and a connecting portion 6 provided at the extending end of the cable 5 in sequence from the front end.

[0041] The tip portion 1 is provided with an imaging unit for observing the inside of the subject, an illumination unit for illuminating the inside of the subject, and the like. The bending portion 2 includes an active bending portion and a passive bending portion. The insertion portion 3 is configured to be insertable from the front end side into the subject in the longitudinal axis direction of the insertion portion 3. The operation portion 4 is provided with an up and down bending operation knob and / or a left and right bending operation knob for performing bending operation on the active bending portion in the bending portion 2. The endoscope is electrically connected to external devices such as a control device and an illumination device via a connection portion 6.

[0042] like Figure 2 As shown, the bending part 2 (including the active bending part and the passive bending part) of the present invention is formed by connecting a plurality of bending pieces 21 through rivets 7. Four rivets 7 are connected to one bending piece 21, and the central axis connecting line of two rivets on the same side constitutes a rotation axis of the bending piece 21. Therefore, two adjacent bending pieces 21 are connected on the rotation axis.

[0043] like Figure 2 As shown, in the present invention, the length axis direction of the bending portion is taken as the x-axis, Figure 2 The up-down direction in the figure is the z-axis, and the radial direction of the bending member 21 perpendicular to the z-axis is the y-axis.

[0044] In addition, although Figure 2 , an example of a bending member 21 having two rotation axes is shown, but the bending member 21 may also have one rotation axis, that is, a bending member that can only rotate in one direction. Although the structures of the bending members 21 constituting the bending portion 2 (the inclination angle of the end face relative to the rotation axis, the position of the rotation axis, etc.) may not be completely the same, the characteristic structure of the bending member 21 described in the present invention is applicable to all the bending members 21 of the bending portion 2 (including the active bending portion and the passive bending portion).

[0045] <First Embodiment>

[0046] Next, refer to Figure 3-Figure 5 The bending material 21 according to the first embodiment of the present invention will be described in detail.

[0047] like Figure 3 as well as Figure 4As shown, the bending member 21 has a first connection portion 211 and a second connection portion 212 for connecting with adjacent bending members 21. The rotation axis R1 passes through the centers of the two first connection portions 211, and the rotation axis R2 passes through the centers of the two second connection portions 212. When the bending member 21 rotates to the maximum angle around R1, the abutment portion 213 on the bending member 21 abuts against the adjacent bending member. Similarly, when the bending member 21 rotates to the maximum angle around R2, the abutment portion 213 on the bending member 21 abuts against the adjacent bending member.

[0048] The bending member 21 has two abutment portions 213 symmetrical with respect to the rotation axis R1 and two abutment portions 213 symmetrical with respect to the rotation axis R2. Although the positions of these abutment portions are different, their basic structures are completely the same, so these abutment portions are collectively referred to as abutment portions 213 and are described together.

[0049] The abutting portion 213 has a first surface 214 located on the outer peripheral surface of the bending member 21 and a second surface 215 located on the end surface of the bending member 21. The area connecting the first surface 214 and the second surface 215 is an edge portion N. The edge portion N can be the intersection line of the first surface 214 and the second surface, or a transition surface (such as a transition plane, a transition arc surface, etc.) connecting the first surface 214 and the second surface. Figure 5 As shown, in the bending member 21 (for example, Figure 5 The leftmost curved member 21) rotates about an axis of rotation (eg, Figure 5 When the rotation axis R2 in the embodiment is rotated to the maximum angle, the edge portion N abuts against the adjacent curved member 21. Specifically, the edge portion N abuts against the end surface of the adjacent curved member 21. In the curved member 21 of the present embodiment, the edge portion N abuts against the rotation axis (for example, Figure 5 When the edge portion N is a transition plane, a transition arc surface, etc., the edge portion N is parallel to the rotation axis means that the generatrix of the edge portion N is parallel to the rotation axis.

[0050] So, like Figure 5 As shown, since the edge portion N is parallel to the rotation axis R2, when the bending piece 21 rotates to the maximum angle around the rotation axis R2 and abuts against the adjacent bending piece 21, the abutting portion of the edge portion N and the adjacent bending piece 21 is greatly increased, thereby increasing the contact area when the bending pieces 21 abut against each other, improving the stability of the fit between the bending pieces and the bending stability of the bending portion of the endoscope, and preventing the bending portion from being twisted unexpectedly.

[0051] In addition, Figure 3-Figure 5 In the embodiment, the first surface 214 is a plane, but the first surface 214 can also be a curved surface, and only the edge portion N is parallel to the rotation axis. Of course, from the perspective of manufacturing the bent part 21, it is preferred that the first surface 214 is a plane, so that the bent part 21 can be manufactured by a simple process such as stamping.

[0052] Although in the present embodiment, the edge portions N of the two abutment portions 213 symmetrical with respect to the rotation axis R1 are parallel to the rotation axis R1, and the edge portions N of the two abutment portions 213 symmetrical with respect to the rotation axis R2 are parallel to the rotation axis R2, it is also possible that only the edge portion N of one abutment portion 213 is parallel to the rotation axis, or only the edge portions N of the two abutment portions 213 are respectively parallel to different rotation axes, or only the edge portions N of the two abutment portions 213 are parallel to the same rotation axis, etc.

[0053] <Second Embodiment>

[0054] Next, refer to Figure 6-Figure 7 The bending material 21A according to the second embodiment of the present invention will be described in detail.

[0055] like Figure 6 As shown, similar to the first embodiment, in the curved member 21A, the outer peripheral surface of the curved member 21A has a first connection portion 211A connected to the adjacent curved member at the first rotation axis (rotation axis R1), and a second connection portion 212A connected to the adjacent curved member at the second rotation axis (rotation axis R2). In addition, in the second embodiment, the rotation axis R1 of the curved member 21A is orthogonal to the rotation axis R2, that is, the projection lines of the first rotation axis R1 and the second rotation axis R2 in the same projection plane perpendicular to the axial direction of the curved member 21A are orthogonal to each other. The first surface of the abutment portion 213 is a plane.

[0056] In addition, if Figure 6 As shown, when the rotation axis R1 is orthogonal to the rotation axis R2, the two abutting portions 213 whose edge portion N is parallel to the rotation axis R1 and the second connecting portion 217A connecting adjacent curved pieces on the rotation axis R2 are located at substantially the same position in the circumferential direction of the curved piece 21A, and the two abutting portions 213 whose edge portion N is parallel to the rotation axis R2 and the first connecting portion 216A connecting adjacent curved pieces on the rotation axis R1 are located at substantially the same position in the circumferential direction of the curved piece 21A. That is, the first surfaces of different abutting portions 213 are located at substantially the same positions in the circumferential direction of the curved piece 21A as the first connecting portion 216A and the second connecting portion 217A, respectively.

[0057] For the purpose of distinction, the first surface of the two abutment portions 213 parallel to the edge portion N and the rotation axis R2 (i.e., the first surface located at approximately the same position as the first connection portion in the circumferential direction of the bending piece) is called the first plane, and the first surface of the two abutment portions 213 parallel to the edge portion N and the rotation axis R1 (i.e., the first surface located at approximately the same position as the second connection portion in the circumferential direction of the bending piece) is called the second plane.

[0058] So, like Figure 6As shown, in this embodiment, the first surface of the abutting portion 213 includes a first plane 216A parallel to the second rotation axis R2 and a second plane 217A parallel to the first rotation axis R1 .

[0059] In the present embodiment, the plurality of bent pieces 21A are connected by rivets 7 , and the outer peripheral surfaces of the first connection portion 211A and the second connection portion 212A in the circumferential direction of the bent piece 21A are also flat surfaces.

[0060] like Figure 6 As shown, in this embodiment, the first plane 216A and the first connecting portion 211A are located in the same plane, and the second plane 217A and the second connecting portion 212A are located in the same plane. Figure 6 As shown, the first plane 216A and the outer peripheral surface of the first connecting portion 211A are in the same plane, and the second plane 217A and the outer peripheral surface of the second connecting portion 212A are in the same plane. Thus, the first surfaces of the connecting portion and the abutting portion can be processed simultaneously by a simple process such as stamping, which can reduce the processing time of the bent piece 21A and improve production efficiency.

[0061] Likewise, if Figure 7 As shown, Figure 7 When the leftmost bending piece 21A rotates to the maximum angle around the rotation axis R2, the edge portion N abuts against the end face of the adjacent bending piece, which also increases the abutting portion of the edge portion N and the adjacent bending piece 21, thereby increasing the contact area when the bending pieces 21 abut against each other, improving the stability of the fit between the bending pieces and the bending stability of the endoscope bending portion, and preventing the bending portion from being twisted unexpectedly.

[0062] <Third Embodiment>

[0063] Next, refer to Figure 8-Figure 9 The bending material 21B according to the third embodiment of the present invention will be described in detail.

[0064] This embodiment is an improvement on the second embodiment. This embodiment is the same as the second embodiment, the rotation axis R1 of the bending member 21B is orthogonal to the rotation axis R2, the outer peripheral surface of the bending member 21B has a first connection portion 211B connected to the adjacent bending member at the first rotation axis (rotation axis R1), and a second connection portion 212B connected to the adjacent bending member at the second rotation axis (rotation axis R2), the first surface of the abutment portion 213 is a plane, and the first surface of the abutment portion 213 includes a first plane 216B parallel to the second rotation axis R2 and a second plane 217B parallel to the first rotation axis R1. Different from the second embodiment, in this embodiment, as Figure 8 As shown, the first plane 216B and the first connecting portion 211B are located in different planes.

[0065] When rivets are used to connect bent pieces, the connecting parts of adjacent bent pieces are fixed by rivets in a stacked manner. Figure 7 As shown, even if the edge N of the contact portion is parallel to the rotation axis R2 , when the bent piece 21A contacts the adjacent bent piece 21A, a gap exists between the edge N and the end surface of the adjacent bent piece 21A.

[0066] In this regard, in this embodiment, the first plane 216B and the first connection portion 211B are arranged on different planes. Specifically, when connected to an adjacent bent piece, if the first connection portion 211B is a connection portion located radially outside the bent piece 21B, then the first plane 216B is located radially inside relative to the first connection portion 211B; if the first connection portion 211B is a connection portion located radially inside the bent piece 21B, then the first plane 216B is located radially outside relative to the first connection portion 211B.

[0067] So, like Figure 7 As shown, even when the rotation axis R1 of the bending piece 21B is orthogonal to the rotation axis R2, when the bending pieces 21B abut against each other, the edge portion N can completely abut against the end face of the adjacent bending piece 21B. Compared with the second embodiment, a larger abutment contact area can be obtained, further improving the stability of the fit between the bending pieces and the bending stability of the bending portion of the endoscope.

[0068] <First Modification>

[0069] In the third embodiment, only the first plane 216B and the first connection portion 211B are set in different planes. However, the second plane 217B and the second connection portion 212B may also be set in different planes at the same time.

[0070] like Fig.10 As shown, in the bending piece 21C of this modified example, not only the first plane 216C and the first connecting portion 211C are arranged on different planes, but also the second plane 216C and the second connecting portion 211C are arranged on different planes.

[0071] Similar to the third embodiment, when connecting with an adjacent curved member, if the first connecting portion 211C is a connecting portion located radially outside the curved member 21C, and the second connecting portion 212C is a connecting portion located radially inside the curved member 21C, then relative to the first connecting portion 211C, the first plane 216C is located radially inside, and relative to the second connecting portion 212C, the second plane 217C is located radially outside; if the first connecting portion 211C is a connecting portion radially inside the curved member 21C, and the second connecting portion 212C is a connecting portion located radially outside the curved member 21C, then relative to the first connecting portion 211C, the first plane 216C is located radially outside, and relative to the second connecting portion 212C, the second plane 217C is located radially inside.

[0072] So, like Fig.11 As shown, even when the rotation axis R1 of the bending piece 21C is orthogonal to the rotation axis R2, when the bending pieces 21C abut against each other, the edge portion N can completely abut against the end face of the adjacent bending piece 21C. Compared with the second embodiment, a larger abutment contact area can be obtained, thereby further improving the stability of the fit between the bending pieces and the bending stability of the bending portion of the endoscope.

[0073] <Fourth Embodiment>

[0074] Next, refer to Figure 12-13 A bending piece 21D according to a fifth embodiment of the present invention will be described in detail.

[0075] In the present embodiment, the second surface 215D of the bent piece 21D is defined.

[0076] like Fig.12 As shown, the curved piece 21D has a first connection portion 211D and a second connection portion 212D, and the contact portion where the edge portion N is parallel to the rotation axis R1 has a first surface 214D located on the outer peripheral surface of the curved piece 21D and a second surface 215D located on the end surface of the curved piece 21D, and the rotation axis R1 is located in the plane where the second surface 215D is located. Similarly, although not shown in the figure, the rotation axis R2 is also located in the plane where the second surface of the contact portion where the edge portion N is parallel to the rotation axis R1 is located.

[0077] So, like Fig.13 As shown, when the bending piece 21D abuts against the adjacent bending piece 21D, the second surface 215D abuts against the adjacent bending piece 21D. Specifically, the second surfaces 215D of the adjacent bending pieces 21D abut against each other, which can greatly increase the contact area when the bending pieces 21D abut against each other, improve the matching stability between the bending pieces and the bending stability of the bending portion of the endoscope, and prevent the bending portion from being unexpectedly twisted.

[0078] In addition, in the present embodiment, the edge portion N connecting the first surface 214D and the second surface 215D is not limited, and the edge portion N may not be parallel to the rotation axis.

[0079] In addition, the features of the second surface 215D in this embodiment can also be applied to the first to third embodiments and the first modification, which can further improve the stability of the fit between the bending parts and the bending stability of the bending portion of the endoscope.

[0080] <Second Modification>

[0081] In the fourth embodiment, the end faces of the bending piece 21D are all planes. It can be said that the end faces of the bending piece 21D are the second surfaces 215D. However, the second surface may be only a part of the end faces of the bending piece, and the end faces of the bending piece may also have other structures.

[0082] like Fig.14 As shown, in this modified example, the bending member 21E has a first connecting portion 211E and a second connecting portion 212E, and the abutting portion where the edge portion N is parallel to the rotation axis R1 has a first surface 214E located on the outer peripheral surface of the bending member 21E and a second surface 215E located on the end surface of the bending member 21E. Similar to the fourth embodiment, the rotation axis R1 is located in the plane where the second surface 215E is located. In addition, the end surface of the bending member 21E has a concave surface 218E in addition to the second surface 215E. The concave surface 218E is concave relative to the second surface 215E in the length direction of the bending member 21E. The number and degree of concave surface 218E can be set as needed.

[0083] So, like Fig.15 As shown, when the bent piece 21E abuts against the adjacent bent piece 21E, not the end faces of the entire bent piece 21E abut against each other, but only the second surfaces 215E abut against each other, and the concave surfaces 218E of the adjacent bent pieces 21E do not contact. Thus, the area of ​​the second surfaces 215E of the bent pieces 21E abutting against each other can be set as needed, thereby improving the design flexibility of the bent piece.

[0084] In addition, although in the drawings, the inner surfaces of the connecting parts of the bending pieces are all planes, the inner side surfaces of the bending pieces can be cylindrical surfaces, that is, complete circumferential surfaces, thereby enabling the bending pieces to accommodate the contents more smoothly.

[0085] The device implementation described above is merely illustrative, and the above implementation and variations are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above implementation, a person of ordinary skill in the art should understand that the technical solutions described in the above implementations may still be modified, or some of the technical features may be replaced by equivalents, or the above technical features may be combined in different ways. However, these modifications, replacements and combinations do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An endoscope bending portion, characterized in that: The endoscope bending portion includes a plurality of bending members, wherein two adjacent bending members among the plurality of bending members are connected on a rotation axis. The bending piece has an abutment portion, wherein the abutment portion has a first surface located on an outer peripheral surface of the bending piece and a second surface located on an end surface of the bending piece. When the bending piece rotates to a maximum angle around the rotation axis, the edge connecting the first surface and the second surface abuts against the adjacent bending piece. The edge portion is parallel to the rotation axis.

2. The endoscope bending portion according to claim 1, characterized in that: The second surface is a plane, and the rotation axis is located in the plane where the second surface is located.

3. The endoscope bending portion according to claim 2, characterized in that: The end surface also has a concave surface that is recessed in the length direction of the bending piece.

4. The endoscope bending portion according to claim 1, characterized in that: The first surface is a plane.

5. The endoscope bending portion according to claim 4, characterized in that: The rotating shaft comprises a first rotating shaft and a second rotating shaft. The projection lines of the first rotation axis and the second rotation axis in the same projection plane perpendicular to the axial direction of the bending member are orthogonal to each other. The outer peripheral surface of the bending piece has a first connection portion connected to the adjacent bending piece at the first rotation axis and a second connection portion connected to the adjacent bending piece at the second rotation axis. The first surface includes a first plane parallel to the second rotation axis and a second plane parallel to the first rotation axis, The first plane and the first connecting portion are located in the same plane, and the second plane and the second connecting portion are located in the same plane.

6. The endoscope bending portion according to claim 4, characterized in that: The rotating shaft comprises a first rotating shaft and a second rotating shaft. The projection lines of the first rotation axis and the second rotation axis in the same projection plane perpendicular to the axial direction of the bending member are orthogonal to each other. The outer peripheral surface of the bending piece has a first connection portion connected to the adjacent bending piece at the first rotation axis and a second connection portion connected to the adjacent bending piece at the second rotation axis. The first surface includes a first plane parallel to the second rotation axis and a second plane parallel to the first rotation axis, The first plane and the first connecting portion are located in different planes.

7. The endoscope bending portion according to claim 6, characterized in that: The second plane and the second connecting portion are located in different planes.

8. The endoscope bending portion according to claim 1, characterized in that: The inner side surface of the bending piece is a cylindrical surface.

9. An endoscope bending portion, characterized in that: The endoscope bending portion includes a plurality of bending members, wherein two adjacent bending members among the plurality of bending members are connected on a rotation axis. The bending piece is provided with an abutment portion, wherein the abutment portion has a first surface located on the outer peripheral surface of the bending piece and a second surface on the end surface of the bending piece. The second surface is a plane, the rotation axis is located in the plane where the second surface is located, and when the bending member rotates around the rotation axis to a maximum angle, the second surface abuts against an adjacent bending member.

10. An endoscope, characterized in that: It has an endoscope bending portion according to any one of claims 1-9.

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