Operating part and endoscope

Abstract

The utility model provides an operation part and an endoscope. A first transmission mechanism comprises a first driving gear, a first driven gear, a first rack and a second rack, one end of a first pull wire and one end of a second pull wire are connected with the first rack and the second rack respectively, and the other ends of the first pull wire and the second pull wire are connected with a bending part respectively; the first driven gear is arranged between the first rack and the second rack to drive the bending part to bend up and down; the second transmission mechanism comprises a second driving gear, a second driven gear, a third rack and a fourth rack, one end of a third pull wire and one end of a fourth pull wire are connected with the third rack and the fourth rack respectively, the other ends of the third pull wire and the fourth pull wire are connected with the bending part respectively, and the second driven gear is arranged between the third rack and the fourth rack to drive the bending part to bend leftwards and rightwards. According to the operation part, the assembly error is small, and the movement strokes of the first rack and the second rack and the movement strokes of the third rack and the fourth rack are increased under the condition that the overall size of the operation part is not increased.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more particularly to an operating part and an endoscope. Background Technology

[0002] Taking the application of endoscopes in the medical field as an example, an endoscope includes an operating section, an insertion section, and a bending section. The bending section can be bent by operating the operating section to facilitate the smooth insertion of the endoscope and observation of lesions. However, in related technologies, the operating section uses a chain traction method to achieve bending drive. On the one hand, this is prone to assembly errors and reduces bending response sensitivity; on the other hand, the overall structure of the operating section is complex and has low reliability. Utility Model Content

[0003] In view of this, the present application aims to provide an operating part and endoscope that achieves bending of the curved part in the vertical and horizontal directions through gear and rack cooperation, which is highly efficient and has a simple and compact overall structure.

[0004] This application provides an operating unit for an endoscope, including:

[0005] Handle assembly;

[0006] A first transmission mechanism and a second transmission mechanism, at least a portion of the first transmission mechanism and the second transmission mechanism being disposed within the handle assembly;

[0007] The first transmission mechanism includes a first driving gear, a first driven gear, a first rack, and a second rack. The operating part includes a first traction line and a second traction line. One end of the first traction line and one end of the second traction line are respectively connected to the first rack and the second rack. The other ends of the first traction line and the second traction line are respectively used to connect to the curved part of the endoscope. The first driving gear meshes with the first driven gear. The first driven gear is disposed between the first rack and the second rack and meshes with the first rack and the second rack. The first rack and the second rack can convert the rotational motion of the first driven gear into linear motion to drive the curved part of the endoscope to bend in the up-down direction.

[0008] The second transmission mechanism includes a second driving gear, a second driven gear, a third rack, and a fourth rack. The operating part includes a third traction line and a fourth traction line. One end of the third traction line and one end of the fourth traction line are respectively connected to the third rack and the fourth rack. The other ends of the third traction line and the fourth traction line are respectively used to connect to the curved part of the endoscope. The second driving gear meshes with the second driven gear. The second driven gear is disposed between the third rack and the fourth rack and meshes with the third rack and the fourth rack. The third rack and the fourth rack can convert the rotational motion of the second driven gear into linear motion to drive the curved part of the endoscope to bend in the left-right direction.

[0009] In some embodiments, the first rack and the third rack are arranged side by side and spaced apart in the vertical direction, and the second rack and the fourth rack are arranged side by side and spaced apart in the vertical direction.

[0010] In some implementations, the side of the first rack facing away from its meshing end with the first driven gear is a first end face, and the side of the second rack facing away from its meshing end with the first driven gear is a second end face; in a plane projection perpendicular to the vertical direction, the projection of the first driving gear falls between the projection of the first end face and the projection of the second end face, or the length of the first driving gear extending beyond the first end face and / or the second end face does not exceed the length of the teeth of the first driving gear.

[0011] And / or, the end face of the third rack facing away from its meshing end with the second driven gear is the third end face, and the end face of the fourth rack facing away from its meshing end with the second driven gear is the fourth end face; in a plane projection perpendicular to the vertical direction, the projection of the second driving gear falls between the projection of the third end face and the projection of the fourth end face, or, the length of the second driving gear extending beyond the third end face and / or the fourth end face does not exceed the length of the teeth of the second driving gear.

[0012] In some embodiments, the operating part includes a mounting base and a partition. The mounting base is fixed within the handle assembly, and the partition is disposed on the mounting base and divides the space within the mounting base vertically into a first mounting space and a second mounting space. At least a portion of the first driving gear, the first driven gear, the first rack, and the second rack are disposed in the first mounting space, and at least a portion of the second driving gear, the second driven gear, the third rack, and the fourth rack are disposed in the second mounting space.

[0013] In some embodiments, a portion of the top wall of the separator protrudes upward to form a first positioning protrusion, the first driven gear is provided with a first positioning hole, and the first positioning protrusion passes through the first positioning hole;

[0014] And / or, a portion of the bottom wall of the mounting base protrudes upward to form a second positioning protrusion, the second driven gear is provided with a second positioning hole, and the second positioning protrusion passes through the second positioning hole.

[0015] In some implementations, the first driving gear includes a first gear portion and a first cylinder portion. The outer surface of the handle assembly is provided with a mounting port. The first gear portion meshes with the first driven gear. One end of the first cylinder portion is connected to the bottom end of the first gear portion, and the other end passes through the separator and the mounting seat and is exposed on the outer surface of the handle assembly through the mounting port. The first cylinder portion can drive the first gear portion to rotate under the action of external force.

[0016] The second driving gear includes a second gear section and a second cylindrical section. The second gear section meshes with the second driven gear. One end of the second cylindrical section is connected to the bottom end of the second gear section, and the other end passes through the mounting base and is exposed on the outer surface of the handle assembly through the mounting port. The second cylindrical section can drive the second gear section to rotate under the action of external force.

[0017] The first cylindrical section and the second cylindrical section do not contact each other.

[0018] In some embodiments, the first cylindrical portion passes through the second cylindrical portion, and the bottom end of the first cylindrical portion extends beyond the bottom end of the second cylindrical portion;

[0019] Alternatively, the second cylindrical portion passes through the first cylindrical portion, with the bottom end of the second cylindrical portion extending beyond the bottom end of the first cylindrical portion.

[0020] In some embodiments, the first cylindrical portion passes through the second cylindrical portion, and the handle assembly includes at least one limiting structure disposed at the edge of the mounting opening to limit the displacement of the second cylindrical portion relative to its axis of rotation.

[0021] In some embodiments, the first driven gear is disposed on the top side of the second driven gear, the first rack and the second rack are disposed on the top side of the third rack and the fourth rack, and the operating part further includes a cover plate, the cover plate is connected to the mounting base and there is no relative movement between the cover plate and the mounting base, and the cover plate covers at least the top side of the first driving gear and the first driven gear.

[0022] In some embodiments, the first cylindrical portion passes through the second cylindrical portion, and a portion of the bottom wall of the cover plate protrudes to form a protrusion, the protrusion passing through and contacting the first cylindrical portion to limit the displacement of the first cylindrical portion relative to its axis of rotation.

[0023] In some implementations, the first driving gear, the first driven gear, the first rack, and the second rack are all integrally injection molded structures; and / or, the second driving gear, the second driven gear, the third rack, and the fourth rack are all integrally injection molded structures.

[0024] This application provides an endoscope, including:

[0025] Insertion section and curved section;

[0026] And the operating part described in any embodiment of this application, wherein the insertion part connects the handle assembly and the bending part, and the first traction line, the second traction line, the third traction line, and the fourth traction line pass through the handle assembly and the insertion part and are respectively connected to the bending part.

[0027] The operating unit provided in this application embodiment enables the bending of the endoscope's curved portion in both vertical and horizontal directions via a first transmission mechanism and a second transmission mechanism. This facilitates adjustment of the detection direction, thereby increasing detection efficiency and reliability. The structural design of the first and second transmission mechanisms minimizes assembly errors. The first driving gear and the first driven gear, as well as the first driven gear and the first and second racks, are always in mesh. There is no idle travel between the second driving gear and the second driven gear, or between the second driven gear and the third and fourth racks. Furthermore, the first and second driven gears increase the travel of the first and second racks, and the third and fourth racks, without increasing the overall size of the operating unit. This also reduces structural limitations on the first and second driving gears, resulting in a simple and reliable overall structure for the operating unit. Attached Figure Description

[0028] Figure 1 This is a partial structural diagram of the operation unit according to an embodiment of this application;

[0029] Figure 2 This is an exploded view of a portion of the structure of the operating part according to an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the structure of the first transmission mechanism and the second transmission mechanism according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures

[0032] 10-Handle assembly; 10a-Mounting port; 101-Limiting structure;

[0033] 11-First transmission mechanism; 111-First driving gear; 1111-First gear section; 1112-First cylinder section; 112-First driven gear; 112a-First positioning hole; 113-First rack; 113a-First end face; 114-Second rack; 114a-Second end face;

[0034] 12-Second transmission mechanism; 121-Second driving gear; 1211-Second gear section; 1212-Second cylinder section; 122-Second driven gear; 122a-Second positioning hole; 123-Third rack; 123a-Third end face; 124-Fourth rack; 124a-Fourth end face;

[0035] 13-Mounting base; 131-Second positioning protrusion; 14-Separator; 141-First positioning protrusion; 15-Cover plate; 151-Protrusion. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0038] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0039] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0040] This application provides an operating unit for an endoscope.

[0041] This application provides an endoscope. The endoscope includes an insertion part, a bending part, and an operating part according to any embodiment of this application.

[0042] Taking the application of endoscopy in the field of medical technology as an example, an endoscope is used to enter the human body or animal through natural cavities or surgical openings. With the help of an endoscope, lesions in the human body or animal can be observed, diagnosed, and treated. For example, an endoscope can be a duodenoscope.

[0043] Please see Figures 1 to 3 The operating unit includes a handle assembly 10, a first transmission mechanism 11, a second transmission mechanism 12, a first traction line, a second traction line, a third traction line, and a fourth traction line.

[0044] The insertion part connects the handle assembly 10 and the curved part.

[0045] At least a portion of the first transmission mechanism 11 and the second transmission mechanism 12 are disposed within the handle assembly 10.

[0046] The first transmission mechanism 11 includes a first driving gear 111, a first driven gear 112, a first rack 113, and a second rack 114. One end of the first traction line and one end of the second traction line are respectively connected to the first rack 113 and the second rack 114. The other ends of the first traction line and the second traction line are respectively used to connect to the curved part of the endoscope. The first driving gear 111 meshes with the first driven gear 112. The first driven gear 112 is disposed between the first rack 113 and the second rack 114 and meshes with the first rack 113 and the second rack 114 respectively. The first rack 113 and the second rack 114 can convert the rotational motion of the first driven gear 112 into linear motion to drive the curved part of the endoscope to bend in the up and down direction.

[0047] The second transmission mechanism 12 includes a second driving gear 121, a second driven gear 122, a third rack 123, and a fourth rack 124. One end of the third traction line and one end of the fourth traction line are connected to the third rack 123 and the fourth rack 124, respectively. The other ends of the third traction line and the fourth traction line are respectively used to connect to the curved part of the endoscope. The second driving gear 121 meshes with the second driven gear 122. The second driven gear 122 is disposed between the third rack 123 and the fourth rack 124 and meshes with the third rack 123 and the fourth rack 124, respectively. The third rack 123 and the fourth rack 124 can convert the rotational motion of the second driven gear 122 into linear motion to drive the curved part of the endoscope to bend in the left and right direction.

[0048] The first traction cable, the second traction cable, the third traction cable, and the fourth traction cable pass through the handle assembly 10 and the insertion part and are respectively connected to the bending part.

[0049] Understandably, the handle assembly 10 is intended for the operator to hold in order to perform the corresponding operations.

[0050] At least a portion of the first transmission mechanism 11 and the second transmission mechanism 12 are disposed within the handle assembly 10. This can be achieved by having the entire structure of the first transmission mechanism 11 and the second transmission mechanism 12 disposed within the space defined by the handle assembly 10, thus making the first transmission mechanism 11 and the second transmission mechanism 12 invisible from the outside. The movement of the first transmission mechanism 11 and the second transmission mechanism 12 is confined within the handle assembly 10, increasing the reliability of the movement. Alternatively, a portion of the structure of the first transmission mechanism 11 and the second transmission mechanism 12 may be disposed within the space defined by the handle assembly 10, while another portion may be disposed outside the handle assembly 10, facilitating connection with other structures or enabling the first transmission mechanism 11 and the second transmission mechanism 12 to move from outside the handle assembly 10.

[0051] The insertion section is the longest part of the endoscope. It can be made of a soft, flexible material to facilitate entry into the body through natural cavities or small incisions in humans or animals. The insertion section may include imaging devices such as fiber optics or cameras to capture images inside the body and transmit them to an external monitor for medical personnel to observe. Alternatively, the insertion section may have a working channel, allowing medical personnel to easily introduce small surgical instruments or other medical devices through the endoscope for procedures such as biopsies and removal of foreign objects under direct vision.

[0052] The curved section is located at the front end of the insertion section. Medical staff can flexibly control the direction and degree of curvature of the curved section by operating the control unit in order to accurately adjust the angle of the endoscope and ensure that the specific location to be examined can be reached.

[0053] In this embodiment, the rotation of the first driving gear 111 can be transmitted to the first rack 113 and the second rack 114 through the first driven gear 112. The first rack 113 and the second rack 114 can convert the rotational motion of the first driven gear 112 into linear motion. The linear motion of the first rack 113 and the second rack 114 is transmitted to the bending part through the first traction line and the second traction line, causing it to bend in the up and down direction, thereby adjusting the detection direction of the endoscope.

[0054] It is understood that the movement of the first rack 113 and the second rack 114 can be opposite. For example, when the first driving gear 111 rotates clockwise, the first driven gear 112 rotates counterclockwise. The first rack 113 can move towards the insertion part, and the second rack 114 can move away from the insertion part. In this case, the first traction line can be in a slack state, which facilitates the second traction line to drive the curved part to bend upwards or downwards. When the first driving gear 111 rotates counterclockwise, the first driven gear 112 rotates clockwise. The first rack 113 can move away from the insertion part, and the second rack 114 can move towards the insertion part. In this case, the second traction line can be in a slack state, which facilitates the first traction line to drive the curved part to bend upwards or downwards.

[0055] Understandably, the first driven gear 112 serves as an intermediate transmission element, increasing the stability and reliability of the first transmission mechanism 11, reducing direct contact between the first driving gear 111 and the first rack 113 and the second rack 114, and reducing wear. The first driven gear 112 can transmit and amplify the rotational force of the first driving gear 111, resulting in greater linear motion between the first rack 113 and the second rack 114. The first driven gear 112 is positioned between the first rack 113 and the second rack 114, facilitating meshing while making full use of space. The distance between the first rack 113 and the second rack 114 can be smaller, increasing structural compactness.

[0056] Of course, the first driven gear 112 can also be used to adjust the transmission ratio in order to achieve precise control over the bending speed and force of the bending part.

[0057] In this embodiment, the rotation of the second driving gear 121 can be transmitted to the third rack 123 and the fourth rack 124 through the second driven gear 122. The third rack 123 and the fourth rack 124 can convert the rotational motion of the second driven gear 122 into linear motion. The linear motion of the third rack 123 and the fourth rack 124 is transmitted to the bending part through the third traction line, causing it to bend in the left and right direction, thereby adjusting the detection direction of the endoscope.

[0058] It is understood that the movement of the third rack 123 and the fourth rack 124 can be opposite. For example, when the second driving gear 121 rotates clockwise, the second driven gear 122 rotates counterclockwise. The third rack 123 can move towards the insertion part, and the fourth rack 124 can move away from the insertion part. In this case, the third traction line can be in a slack state, facilitating the fourth traction line to bend the curved part to either the left or the right. Conversely, when the second driving gear 121 rotates counterclockwise, the second driven gear 122 rotates clockwise. The third rack 123 can move away from the insertion part, and the fourth rack 124 can move towards the insertion part. In this case, the fourth traction line can be in a slack state, facilitating the third traction line to bend the curved part to either the left or the right.

[0059] Understandably, the second driven gear 122 serves as an intermediate transmission element, increasing the stability and reliability of the second transmission mechanism 12, reducing direct contact between the second driving gear 121 and the third rack 123 and fourth rack 124, and reducing wear. The second driven gear 122 can transmit and amplify the rotational force of the second driving gear 121, resulting in greater linear motion between the third rack 123 and fourth rack 124. The second driven gear 122 is positioned between the third rack 123 and fourth rack 124, facilitating meshing while making full use of space. The distance between the third rack 123 and fourth rack 124 can be smaller, increasing structural compactness.

[0060] Of course, the second driven gear 122 can also be used to adjust the transmission ratio to achieve precise control over the bending speed and force of the bent part.

[0061] It is understandable that the up-down and left-right directions represent the orientation of the endoscope when it is in normal use. The movement direction of the first rack 113, the second rack 114, the third rack 123, and the fourth rack 124 can be the front-back direction. The first traction cable, the second traction cable, the third traction cable, and the fourth traction cable can be structures such as steel wire ropes.

[0062] The operating unit provided in this application embodiment enables the bending of the endoscope's curved portion in both vertical and horizontal directions via a first transmission mechanism 11 and a second transmission mechanism 12, thereby facilitating adjustment of the detection direction and increasing detection efficiency and reliability. The structural design of the first transmission mechanism 11 and the second transmission mechanism 12 results in minimal assembly error. The first driving gear 111 and the first driven gear 112, and the first driven gear 112 and the first rack 113 and the second rack 114 are always in mesh. There is no idle travel between the second driving gear 121 and the second driven gear 122, and between the second driven gear 122 and the third rack 123 and the fourth rack 124. Furthermore, the first driven gear 112 and the second driven gear 122 can increase the travel of the first rack 113 and the second rack 114, and the third rack 123 and the fourth rack 124, without increasing the overall size of the operating unit. This also reduces structural limitations on the first driving gear 111 and the second driving gear 121, resulting in a simple and reliable overall structure for the operating unit.

[0063] It is understandable that the first transmission mechanism 11 and the second transmission mechanism 12 are independent of each other and do not interfere with each other.

[0064] In some embodiments, please refer to Figure 2 and Figure 3 The first rack 113 and the third rack 123 are arranged side by side and spaced apart in the vertical direction, and the second rack 114 and the fourth rack 124 are arranged side by side and spaced apart in the vertical direction.

[0065] In other words, the first rack 113 is located above or below the third rack 123, and the second rack 114 is located above or below the fourth rack 124. The first rack 113 and the third rack 123, and the second rack 114 and the fourth rack 124 are spaced apart in the vertical direction. In this way, the compactness of the layout of the operating part can be increased and the layout size of the operating part in the front-back direction can be reduced while ensuring that the movements of the first rack 113 and the third rack 123, and the second rack 114 and the fourth rack 124 do not interfere with each other. This allows the first rack 113, the second rack 114, the third rack 123, and the fourth rack 124 to have sufficient arrangement space in the front-back direction.

[0066] For example, the first rack 113 is located above the third rack 123, and the second rack 114 is located above the fourth rack 124.

[0067] In some embodiments, please refer to Figure 2 and Figure 3The end face of the first rack 113 facing away from its meshing end with the first driven gear 112 is designated as the first end face 113a, and the end face of the second rack 114 facing away from its meshing end with the first driven gear 112 is designated as the second end face 114a. In a plane projection perpendicular to the vertical direction, the projection of the first driving gear 111 falls between the projection of the first end face 113a and the projection of the second end face 114a, or the length of the first driving gear 111 extending beyond the first end face 113a and / or the second end face 114a does not exceed the length of the teeth of the first driving gear 111.

[0068] In other words, the projection of the first driving gear 111 falls entirely or mostly between the first end face 113a and the second end face 114a. By reducing the distance between the first rack 113 and the second rack 114 through the first driven gear 112, the size of the first driving gear 111 can also be smaller, thereby increasing the structural compactness of the first transmission mechanism 11.

[0069] In some embodiments, please refer to Figure 2 and Figure 3 The end face of the third rack 123 that is away from the end that meshes with the second driven gear 122 is the third end face 123a, and the end face of the fourth rack 124 that is away from the end that meshes with the second driven gear 122 is the fourth end face 124a.

[0070] In a plane projection perpendicular to the vertical direction, the projection of the second drive gear 121 falls between the projection of the third end face 123a and the projection of the fourth end face 124a, or the length of the second drive gear 121 extending beyond the third end face 123a and / or the fourth end face 124a does not exceed the length of the teeth of the second drive gear 121.

[0071] In other words, the projection of the second driving gear 121 falls entirely or mostly between the third end face 123a and the fourth end face 124a. By reducing the distance between the third rack 123 and the fourth rack 124 through the second driven gear 122, the size of the second driving gear 121 can also be smaller, thereby increasing the structural compactness of the second transmission mechanism 12.

[0072] In some embodiments, please refer to Figure 2 The operating unit includes a mounting base 13 and a partition 14. The mounting base 13 is fixed inside the handle assembly 10. The partition 14 is disposed on the mounting base 13 and divides the space inside the mounting base 13 into a first mounting space and a second mounting space in the vertical direction. At least a portion of the first driving gear 111, the first driven gear 112, the first rack 113 and the second rack 114 are disposed in the first mounting space. At least a portion of the second driving gear 121, the second driven gear 122, the third rack 123 and the fourth rack 124 are disposed in the second mounting space.

[0073] In this embodiment, the first mounting space and the second mounting space are separated by the separator 14, which isolates the first driving gear 111 from the second driving gear 121, the first driven gear 112 from the second driven gear 122, the first rack 113 from the third rack 123, and the second rack 114 from the fourth rack 124. This ensures that the movements of the first transmission mechanism 11 and the second transmission mechanism 12 do not interfere with each other, increasing the reliability of the movement. Furthermore, the vertically arranged structure also increases the compactness of the layout and reduces the size of the operating part in the front-to-back direction.

[0074] Mounting base 13 can serve as a mounting base to protect the first transmission mechanism 11 and the second transmission mechanism 12, and can prevent the movement of the internal structure of mounting base 13 from affecting other moving structures in the operating part.

[0075] Understandably, the mounting base 13 may be provided with a sliding groove to facilitate the linear movement of the first rack 113, the second rack 114, the third rack 123, and the fourth rack 124.

[0076] In some embodiments, please refer to Figure 2 The top wall of the separator 14 protrudes upward to form a first positioning protrusion 141. The first driven gear 112 is provided with a first positioning hole 112a, and the first positioning protrusion 141 passes through the first positioning hole 112a.

[0077] In this embodiment, the cooperation between the first positioning protrusion 141 and the first positioning hole 112a facilitates the precise positioning of the first driven gear 112, reduces installation deviation, and the first positioning protrusion 141 passing through the first positioning hole 112a can also restrict the movement of the first driven gear 112, reduce unnecessary offset, and increase motion reliability.

[0078] In some embodiments, please refer to Figure 2 The bottom wall of the mounting base 13 protrudes upward to form a second positioning protrusion 131. The second driven gear 122 is provided with a second positioning hole 122a, and the second positioning protrusion 131 passes through the second positioning hole 122a.

[0079] In this embodiment, the cooperation between the second positioning protrusion 131 and the second positioning hole 122a facilitates the precise positioning of the second driven gear 122, reduces installation deviation, and the second positioning protrusion 131 passing through the second positioning hole 122a can also restrict the movement of the second driven gear 122, reduce unnecessary offset, and increase motion reliability.

[0080] In some embodiments, please refer to Figure 1 and Figure 2The first driving gear 111 includes a first gear part 1111 and a first cylinder part 1112. The outer surface of the handle assembly 10 is provided with a mounting port 10a. The first gear part 1111 meshes with the first driven gear 112. One end of the first cylinder part 1112 is connected to the bottom end of the first gear part 1111, and the other end passes through the separator 14 and the mounting seat 13 and is exposed on the outer surface of the handle assembly 10 through the mounting port 10a. The first cylinder part 1112 can drive the first gear part 1111 to rotate under the action of external force.

[0081] In other words, by rotating the first cylindrical portion 1112, the first gear portion 1111 can be rotated, thereby driving the first driven gear 112, the first rack 113, and the second rack 114 to move. The first cylindrical portion 1112 is exposed on the outer surface of the handle assembly 10, meaning that the first cylindrical portion 1112 can be seen from the outside of the handle assembly 10, thus facilitating the application of force to the first cylindrical portion 1112 or facilitating the connection of the first cylindrical portion 1112 with other drive mechanisms.

[0082] It is understandable that external force can be applied directly to the first cylindrical part 1112 to drive the first gear part 1111 to rotate. Alternatively, the first cylindrical part 1112 can be connected to other drive structures, which drive the first cylindrical part 1112 to drive the first gear part 1111 to rotate.

[0083] Please see Figure 1 and Figure 2 The second driving gear 121 includes a second gear portion 1211 and a second cylinder portion 1212. The second gear portion 1211 meshes with the second driven gear 122. One end of the second cylinder portion 1212 is connected to the bottom end of the second gear portion 1211, and the other end passes through the mounting base 13 and is exposed on the outer surface of the handle assembly 10 through the mounting port 10a. The second cylinder portion 1212 can drive the second gear portion 1211 to rotate under the action of external force.

[0084] In other words, by rotating the second cylinder 1212, the second gear 1211 can be rotated, which in turn drives the second driven gear 122, the third rack 123, and the fourth rack 124 to move. The second cylinder 1212 is exposed on the outer surface of the handle assembly 10, meaning that the second cylinder 1212 can be seen from the outside of the handle assembly 10. This facilitates the application of force to the second cylinder 1212 or the connection of the second cylinder 1212 with other drive mechanisms.

[0085] It is understandable that external force can be applied directly to the second cylinder 1212 to drive the second gear 1211 to rotate. Alternatively, the second cylinder 1212 can be connected to other drive structures, which drive the second cylinder 1212 to drive the second gear 1211 to rotate.

[0086] It is understandable that the first cylindrical section 1112 and the second cylindrical section 1212 are roughly hollow columnar structures.

[0087] The first cylindrical section 1112 and the second cylindrical section 1212 do not contact each other. That is to say, the first cylindrical section 1112 and the second cylindrical section 1212 have no connection or contact parts. As a result, the rotation of the first cylindrical section 1112 and the second cylindrical section 1212 is independent of each other and does not interfere with each other, thus increasing the reliability of the movement.

[0088] The first cylindrical portion 1112 and the second cylindrical portion 1212 do not contact each other. It is possible that the first cylindrical portion 1112 is located outside the second cylindrical portion 1212, or the second cylindrical portion 1212 is located outside the first cylindrical portion 1112. In this case, the first cylindrical portion 1112 will not pass through the second cylindrical portion 1212, and the second cylindrical portion 1212 will not pass through the first cylindrical portion 1112. Alternatively, one of the first cylindrical portion 1112 and the second cylindrical portion 1212 may pass through the other, but without making contact. No restrictions are imposed here.

[0089] For example, in some embodiments, please refer to Figure 1 and Figure 2 The first cylindrical portion 1112 passes through the second cylindrical portion 1212, with the bottom end of the first cylindrical portion 1112 extending beyond the bottom end of the second cylindrical portion 1212. In this way, the second cylindrical portion 1212 provides space for the first cylindrical portion 1112 to pass through, increasing structural compactness and overall layout. The portion of the first cylindrical portion 1112 extending beyond the second cylindrical portion 1212 facilitates the application of external force to the first cylindrical portion 1112, increasing operational convenience.

[0090] In other embodiments, the second cylindrical portion 1212 passes through the first cylindrical portion 1112, with the bottom end of the second cylindrical portion 1212 extending beyond the bottom end of the first cylindrical portion 1112. In this way, the first cylindrical portion 1112 provides space for the second cylindrical portion 1212 to pass through, increasing structural and layout compactness. The portion of the second cylindrical portion 1212 extending beyond the first cylindrical portion 1112 facilitates the application of external force to the second cylindrical portion 1212, increasing operational convenience.

[0091] In some embodiments, please refer to Figure 2 The first cylindrical portion 1112 passes through the second cylindrical portion 1212. The handle assembly 10 includes at least one limiting structure 101, which is disposed at the edge of the mounting opening 10a to limit the displacement of the second cylindrical portion 1212 relative to its axis of rotation.

[0092] In this embodiment, the setting of the limiting structure 101 can restrict the position of the second cylinder 1212, reduce the offset of the second cylinder 1212 relative to the rotation axis due to shaking or external structural compression, so that the position of the second cylinder 1212 can be basically determined, which facilitates the rotation of the second gear 1211.

[0093] In some embodiments, please refer to Figure 1 and Figure 2 The first driven gear 112 is disposed on the top side of the second driven gear 122, the first rack 113 and the second rack 114 are disposed on the top side of the third rack 123 and the fourth rack 124, and the operating part also includes a cover plate 15. The cover plate 15 is connected to the mounting base 13 and there is no relative movement between the cover plate 15 and the mounting base 13. The cover plate 15 covers at least the top side of the first driving gear 111 and the first driven gear 112.

[0094] Here, "no relative movement between cover plate 15 and mounting base 13" means that cover plate 15 and mounting base 13 can remain relatively stationary, and that cover plate 15 and mounting base 13 do not move when the first transmission mechanism 11 and the second transmission mechanism 12 are in motion.

[0095] In this embodiment, the cover plate 15 can protect the first driving gear 111 and the first driven gear 112. On the one hand, it reduces the probability of the first driving gear 111 and the first driven gear 112 coming off the mounting base 13 and increases the safety of movement. On the other hand, it also reduces the influence of other structures in the operating part on the first driving gear 111 and the first driven gear 112.

[0096] In some embodiments, please refer to Figure 1 and Figure 2 The first cylindrical portion 1112 passes through the second cylindrical portion 1212. A portion of the bottom wall of the cover plate 15 protrudes to form a protrusion 151. The protrusion 151 passes through the first cylindrical portion 1112 and contacts the first cylindrical portion 1112 to limit the displacement of the first cylindrical portion 1112 relative to its axis of rotation.

[0097] In this embodiment, the protrusion 151 formed by the cover plate 15 can restrict the position of the first cylindrical part 1112, reduce the displacement of the first cylindrical part 1112 relative to the axis of rotation due to shaking or external structural compression, so that the position of the first cylindrical part 1112 can be basically determined, which facilitates the rotation of the first gear part 1111.

[0098] In some embodiments, the first driving gear 111, the first driven gear 112, the first rack 113, and the second rack 114 are all integral injection molded structures.

[0099] In other words, the first driving gear 111, the first driven gear 112, the first rack 113, and the second rack 114 can be integrally molded by injection molding, which is fast, easy to assemble, and has low production cost.

[0100] The first driving gear 111, the first driven gear 112, the first rack 113, and the second rack 114 can be injection molded from plastic materials to reduce manufacturing costs.

[0101] In some embodiments, the second driving gear 121, the second driven gear 122, the third rack 123, and the fourth rack 124 are all integral injection molded structures.

[0102] In other words, the second driving gear 121, the second driven gear 122, the third rack 123, and the fourth rack 124 can be integrally molded by injection molding, which is fast, easy to assemble, and has low production cost.

[0103] The second driving gear 121, the second driven gear 122, the third rack 123, and the fourth rack 124 can be injection molded from plastic materials to reduce manufacturing costs.

[0104] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0105] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An operating portion for an endoscope, characterized by comprising: include: Handle assembly; A first transmission mechanism and a second transmission mechanism, at least a portion of the first transmission mechanism and the second transmission mechanism being disposed within the handle assembly; The first transmission mechanism includes a first driving gear, a first driven gear, a first rack, and a second rack. The operating part includes a first traction line and a second traction line. One end of the first traction line and one end of the second traction line are respectively connected to the first rack and the second rack. The other ends of the first traction line and the second traction line are respectively used to connect to the curved part of the endoscope. The first driving gear meshes with the first driven gear. The first driven gear is disposed between the first rack and the second rack and meshes with the first rack and the second rack. The first rack and the second rack can convert the rotational motion of the first driven gear into linear motion to drive the curved part of the endoscope to bend in the up-down direction. The second transmission mechanism includes a second driving gear, a second driven gear, a third rack, and a fourth rack. The operating part includes a third traction line and a fourth traction line. One end of the third traction line and one end of the fourth traction line are respectively connected to the third rack and the fourth rack. The other ends of the third traction line and the fourth traction line are respectively used to connect to the curved part of the endoscope. The second driving gear meshes with the second driven gear. The second driven gear is disposed between the third rack and the fourth rack and meshes with the third rack and the fourth rack. The third rack and the fourth rack can convert the rotational motion of the second driven gear into linear motion to drive the curved part of the endoscope to bend in the left-right direction.

2. The operating portion according to claim 1, characterized by The first rack and the third rack are arranged side by side and spaced apart in the vertical direction, and the second rack and the fourth rack are arranged side by side and spaced apart in the vertical direction.

3. The operating portion according to claim 1, characterized by The first rack has a first end face facing away from the end of it meshing with the first driven gear, and the second rack has a second end face facing away from the end of it meshing with the first driven gear. In a plane projection perpendicular to the vertical direction, the projection of the first driving gear falls between the projection of the first end face and the projection of the second end face, or the length of the first driving gear extending beyond the first end face and / or the second end face does not exceed the length of the teeth of the first driving gear. And / or, the end face of the third rack facing away from its meshing end with the second driven gear is the third end face, and the end face of the fourth rack facing away from its meshing end with the second driven gear is the fourth end face; in a plane projection perpendicular to the vertical direction, the projection of the second driving gear falls between the projection of the third end face and the projection of the fourth end face, or, the length of the second driving gear extending beyond the third end face and / or the fourth end face does not exceed the length of the teeth of the second driving gear.

4. The operating portion according to claim 1, characterized by The operating part includes a mounting base and a partition. The mounting base is fixed inside the handle assembly. The partition is disposed on the mounting base and divides the space inside the mounting base into a first mounting space and a second mounting space in the vertical direction. At least a portion of the first driving gear, the first driven gear, the first rack, and the second rack are disposed in the first mounting space. At least a portion of the second driving gear, the second driven gear, the third rack, and the fourth rack are disposed in the second mounting space.

5. The operating portion according to claim 4, characterized in that The top wall of the separator protrudes upward to form a first positioning protrusion, the first driven gear is provided with a first positioning hole, and the first positioning protrusion passes through the first positioning hole. And / or, a portion of the bottom wall of the mounting base protrudes upward to form a second positioning protrusion, the second driven gear is provided with a second positioning hole, and the second positioning protrusion passes through the second positioning hole.

6. The operating portion according to claim 4, wherein The first driving gear includes a first gear part and a first cylinder part. The outer surface of the handle assembly is provided with a mounting port. The first gear part meshes with the first driven gear. One end of the first cylinder part is connected to the bottom end of the first gear part, and the other end passes through the separator and the mounting seat and is exposed on the outer surface of the handle assembly through the mounting port. The first cylinder part can drive the first gear part to rotate under the action of external force. The second driving gear includes a second gear section and a second cylindrical section. The second gear section meshes with the second driven gear. One end of the second cylindrical section is connected to the bottom end of the second gear section, and the other end passes through the mounting base and is exposed on the outer surface of the handle assembly through the mounting port. The second cylindrical section can drive the second gear section to rotate under the action of external force. The first cylindrical section and the second cylindrical section do not contact each other.

7. The operating portion according to claim 6, characterized in that The first cylindrical portion passes through the second cylindrical portion, and the bottom end of the first cylindrical portion extends beyond the bottom end of the second cylindrical portion; or, the second cylindrical portion passes through the first cylindrical portion, and the bottom end of the second cylindrical portion extends beyond the bottom end of the first cylindrical portion.

8. The operating portion according to claim 6, wherein The first cylindrical portion passes through the second cylindrical portion, and the handle assembly includes at least one limiting structure disposed at the edge of the mounting opening to limit the displacement of the second cylindrical portion relative to its axis of rotation.

9. The operating portion according to claim 6, wherein The first driven gear is disposed on the top side of the second driven gear, the first rack and the second rack are disposed on the top side of the third rack and the fourth rack, the operating part further includes a cover plate, the cover plate is connected to the mounting base and there is no relative movement between the cover plate and the mounting base, and the cover plate covers at least the top side of the first driving gear and the first driven gear.

10. The operating portion according to claim 9, characterized in that The first cylindrical portion passes through the second cylindrical portion, and a portion of the bottom wall of the cover plate protrudes to form a protrusion. The protrusion passes through the first cylindrical portion and contacts the first cylindrical portion to limit the displacement of the first cylindrical portion relative to its axis of rotation.

11. Operating portion according to any one of claims 1-10, characterized in that The first driving gear, the first driven gear, the first rack, and the second rack are all integral injection molded structures; and / or, the second driving gear, the second driven gear, the third rack, and the fourth rack are all integral injection molded structures.

12. An endoscope characterized by comprising: include: Insertion section and curved section; And the operating part according to any one of claims 1-11, wherein the insertion part connects the handle assembly and the bending part, and the first traction line, the second traction line, the third traction line, and the fourth traction line pass through the handle assembly and the insertion part and are respectively connected to the bending part.

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