External operation machine body and endoscope

Abstract

The invention discloses an external operation machine body and an endoscope, the external operation machine body comprises a shell, a traction mechanism and an abutting mechanism, and the shell forms a mounting cavity; the traction mechanism comprises a tractor and a traction line, and is driven to move in the rotation process of the tractor, so that the intervention part can be laterally bent to move; the abutting mechanism comprises a guiding piece and an abutting piece which are sequentially arranged in the axial direction of the tractor, the surface of one axial end of the guiding piece is a concave-convex face, the concave-convex face comprises a first convex face, a second convex face and a concave face, and the protruding height of the second convex face in the axial direction is larger than that of the first convex face. The abutting piece comprises a walking part capable of moving and walking on the concave-convex face and an abutting part abutting against the shaft end surface of the tractor, and under driving of external force, the walking part can move and walk on the first convex face, the second convex face and the concave face so as to drive the axial abutting force of the abutting part on the tractor to be adjustable. According to the endoscope unlocking device, the unlocking modes of the endoscope are more diversified, and the endoscope unlocking device has the advantages of being simple in structure and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and particularly relates to an external operating body and an endoscope. Background Art

[0002] Existing various endoscopes generally include an external operating body and an intervening component. Among them, the intervening component is used to be inserted into a patient's body to a diseased part; the external operating body is disposed outside and is for medical staff to operate the intervening component to observe, examine and treat the diseased part in the patient's body. In practical applications, the head end of the intervening component is provided with required components such as an imaging device and a lighting device. In order to assist in treatment, the intervening component needs to be bent laterally to a certain angle, and the bending angle needs to be locked and finely adjusted, so as to adjust the head end to a preset posture. At present, the locking methods of existing endoscopes on the market generally only have a locked state and an unlocked state, and there is no function of a semi-locked state. The semi-locked state can be understood as hovering of the bending part in the insertion part at the current bending angle. In the semi-locked state, the operator can still adjust the bending angle of the bending part without unlocking to perform the angle adjustment, which increases the surgical steps and greatly increases the hand fatigue of the operator. Summary of the Invention

[0003] The main object of the present invention is to propose an external operating body and an endoscope, aiming to solve the problem that the locking method in traditional endoscopes is single and the semi-locked state cannot be achieved.

[0004] To achieve the above object, an external operating body proposed by the present invention is applied to an endoscope. The external operating body includes:

[0005] A housing, forming an installation cavity;

[0006] A traction mechanism, including a traction device rotatably installed around its own axis in the installation cavity and a traction wire movably wound around the outer periphery of the traction device. A free section of the traction wire extends outwards from the installation cavity and is connected to an intervening component of the endoscope, so as to be driven to move during the rotation of the traction device, such that the intervening component can be bent laterally; and,

[0007] An abutting mechanism, including a guiding member and an abutting member arranged in sequence along the axial direction of the traction device. One axial end surface of the guiding member is a concave-convex surface, the concave-convex surface includes a first convex surface, a second convex surface and a concave surface, and the protruding height of the second convex surface along the axial direction is greater than the protruding height of the first convex surface. The abutting member includes a walking part movably walking at the concave-convex surface and an abutting part abutting against the axial end surface of the traction device. Under the drive of an external force, the walking part can movably walk at the first convex surface, the second convex surface and the concave surface respectively, so as to drive the abutting part to adjust the axial abutting pressure on the traction device.

[0008] Optionally, the guide member and the abutting member are arranged on the same side of the tractor in its axial direction.

[0009] Optionally, the guide member is axially penetrated with a connection hole, and the concave-convex surface extends along the outer periphery of the connection hole;

[0010] The abutting member further includes a connecting portion movably penetrating through the connection hole, and a holding portion connected to the connecting portion and extending out of the installation cavity. By operating the holding portion to rotate around the connecting portion with an external force, the traveling portion is driven to move on the concave-convex surface.

[0011] Optionally, the concave surface, the first convex surface, and the second convex surface are sequentially arranged along the same circumferential direction of the connection hole;

[0012] The concave surface, the first convex surface, and the second convex surface are smoothly connected to each other through inclined surfaces or arc surfaces respectively.

[0013] Optionally, the concave-convex surface further includes a third convex surface, the protruding height of the third convex surface is greater than the protruding height of the second convex surface, and a stop surface is formed at the connection between the two, and the stop surface circumferentially stops the traveling portion.

[0014] Optionally, the concave surface, the first convex surface, and the second convex surface are respectively provided with two groups on the outer circumference of the connection hole, and the two concave surfaces, the two first convex surfaces, and the two second convex surfaces between the two groups are respectively centrosymmetrically arranged with respect to the connection hole;

[0015] The holding portion, the connecting portion, and the abutting portion are sequentially connected along the axial direction of the tractor. There are two corresponding traveling portions, and the two traveling portions respectively protrude on the radial two sides of the connecting portion.

[0016] Optionally, the abutting portion is eccentrically arranged on the axial end surface of the tractor.

[0017] Optionally, the abutting portion is arranged closer to the outer periphery of the tractor relative to the axis of the tractor.

[0018] Optionally, part of the shell plate of the housing constitutes the guide member.

[0019] In addition, to achieve the above object, the present invention further provides an endoscope, including:

[0020] An interventional component; and,

[0021] The external operation body as described above.

[0022] In the technical solution provided by the present invention, the traction mechanism and the abutting mechanism are independently arranged, so that the tractor in the traction mechanism can independently realize the traction adjustment of the traction wire, and then realize the bending adjustment of the interventional component to different degrees; the abutting mechanism can independently realize the stop adjustment of the rotation process of the tractor, and then realize the hovering of the interventional component in different bending states; since the protruding heights of the first convex surface, the second convex surface and the concave surface along the axis are different, when the walking part walks along the first convex surface, the second convex surface and the concave surface respectively, it can correspondingly drive the abutting part to apply at least three different axial abutting pressures to the tractor, and then it can be specifically corresponding to the unlocked state, the semi-locked state and the fully locked state of the tractor, making the unlocking method of the endoscope more diverse, and having the characteristics of simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 Stereoscopic schematic diagram of an embodiment of the external operating body provided by the present invention;

[0025] Figure 2 is Figure 1 Main structure decomposition schematic diagram of the external operating body in;

[0026] Figure 3 is Figure 1 Stereoscopic schematic diagram of a shell plate in;

[0027] Figure 4 is Figure 3 Enlarged structure schematic diagram of part A in;

[0028] Figure 5 is Figure 4 Partial structure unfolding schematic diagram of the concave and convex surfaces at the guide member in;

[0029] Figure 6 is Figure 1 Decomposition schematic diagram of the abutting member in.

[0030] Explanation of the reference numerals in the drawings:

[0031] 100 Housing; 110 Housing plate; 120 Operation hole; 200 Traction mechanism; 210 Traction device; 220 Operating part; 300 Abutting mechanism; 310 Guide part; 311 Concave surface; 312 First convex surface; 313 Second convex surface; 314 Third convex surface; 315 Stop surface; 316 Connection hole; 320 Abutting member; 321 Pushing and twisting member; 321a Holding part; 322 First shaft body; 322a Connection part; 322b Abutting part; 323 Second shaft body; 323a Traveling part.

[0032] The realization, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0036] Please refer to Figures 1 to 6 , the present invention provides an external operating body and an endoscope to which it is applied. Among them, the external operating body may include a housing 100, a traction mechanism 200, and an abutting mechanism 300. Among them,

[0037] The housing 100 forms an installation cavity; the traction mechanism 200 includes a tractor 210 rotatably mounted about its own axis in the installation cavity, and a traction wire movably wound around the outer periphery of the tractor 210. The free section of the traction wire extends outward from the installation cavity and is connected to the intervention component of the endoscope, so as to be driven to move during the rotation of the tractor 210, enabling the intervention component to be bent laterally; the abutting mechanism 300 includes a guide member 310 and an abutting member 320 arranged in sequence along the axial direction of the tractor 210. One axial end surface of the guide member 310 is an uneven surface, which includes a first convex surface 312, a second convex surface 313 and a concave surface 311. The protruding height of the second convex surface 313 along the axial direction is greater than that of the first convex surface 312. The abutting member 320 includes a walking portion 323a that can move on the uneven surface and an abutting portion 322b that abuts against the axial end surface of the tractor 210. Under the drive of an external force, the walking portion 323a can move on the first convex surface 312, the second convex surface 313 and the concave surface 311 respectively, so as to drive the abutting portion 322b to adjust the axial abutting pressure on the tractor 210.

[0038] In the technical solution provided by the present invention, the traction mechanism 200 and the abutting mechanism 300 are independently arranged, so that the tractor 210 in the traction mechanism 200 can independently realize the traction adjustment of the traction wire, and then realize the lateral bending adjustment of different degrees of the intervention component; the abutting mechanism 300 can independently realize the stop adjustment of the rotation process of the tractor 210, and then realize the hovering of the intervention component in different lateral bending states; since the protruding heights of the first convex surface 312, the second convex surface 313 and the concave surface 311 along the axial direction are different, when the walking portion 323a walks along the first convex surface 312, the second convex surface 313 and the concave surface 311 respectively, it can correspondingly drive the abutting portion 322b to apply at least three different axial abutting pressures to the tractor 210, and then can specifically correspond to the unlocked state, semi-locked state and fully locked state of the tractor 210, making the unlocking method of the endoscope more diverse, and having the characteristics of simple structure and convenient operation.

[0039] It can be understood that except for the external operation body, the endoscope further includes an intervention component connected to the front end of the external operation body and extending forward. The end of the intervention component far from the external operation body is the head end. According to actual needs, the head end can be integrally provided with, for example, an imaging device and / or an illumination device. The imaging device can capture an image of the diseased part when the intervention component is inserted into the patient's body to the diseased part. The illumination device can illuminate the diseased part.

[0040] In order to better adjust the position and orientation of the head end, the intervening component is generally configured to be laterally bendable and deformable and resetable. One end of the traction wire in the above-mentioned traction mechanism 200 away from the tractor 210 is threaded through the intervening component and extends toward the head end to be fixedly connected to the radial side wall of the intervening component adjacent to the head end, so that when the traction wire is driven to be wound up, the intervening component is controlled to bend laterally, and when the traction wire is driven to be released, the intervening component is controlled to reset. It should be noted that generally two traction wires can be wound around the same tractor 210. Or the same tractor 210 can wind the middle section of the same traction wire, and then two traction sections are led out. The two traction sections are threaded through the intervening component and are respectively fixedly connected to the radial side walls on both sides of the intervening component, so as to realize the separate control of the lateral bending on both sides of the intervening component.

[0041] The extending direction of the central axis of the tractor 210 (hereinafter simply referred to as the axial direction for the convenience of understanding) is generally substantially perpendicular to the front-back direction of the endoscope. In the external operating body, in order to facilitate disassembly and assembly operations, the housing generally includes at least two housing plates 110. Each housing plate 110 is detachably connected, and when connected, they jointly enclose and define an installation cavity. As Figures 1 to 6 shown in the structure, the housing includes two housing plates 110, and the two housing plates 110 are arranged in sequence along the axial direction of the tractor 210. In a specific solution, in order to make the rotational adjustment of the tractor 210 easier to operate, the housing is also provided with an operation hole 120 on the radial side of the tractor 210. The operation hole 120 extends in a long shape along the circumferential direction of the tractor 210. The operation hole 120 can be specifically opened at the connection between the two housing plates 110, that is, basically located in the middle of the housing in the axial direction of the tractor 210. The traction mechanism 200 further includes an operating member 220. One section of the operating member 220 extends into the installation cavity and is fixedly connected to the radial side wall of the tractor 210, and the other section extends out of the installation cavity through the operation hole 120. The operator holds the operating member 220 and moves it along the operation hole 120 to drive the tractor 210 to rotate forward and backward around its own axis.

[0042] In the abutting mechanism 300 in the present application, the size change of the concave-convex surface in the axial direction can be converted into the change of the abutting force of the abutting portion 322b on the axial end surface of the tractor 210 by the abutting member 320, and then into the change of the stopping rotation force on the rotation process of the tractor 210. For this reason, there can be various specific solutions for the guiding member 310 and the abutting member 320 in the abutting mechanism 300.

[0043] Specifically, the guide member 310, the abutting member 320, and the traction device 210 are arranged axially in sequence, but the arrangement positions of the three are not limited. For example, in one embodiment, the concave-convex surface of the guide member 310 and the traveling portion 323a of the abutting member 320 can be located on one axial side of the traction device 210, and the abutting portion 322b of the abutting member 320 is located at and abuts against the other axial end of the traction device 210. At this time, the portion of the abutting member 320 between the abutting portion 322b and the traveling portion 323a can pass through the traction device 210 through the hole structure formed in the traction device 210. The hole structure extends along the central axis of the traction device 210 to avoid interfering with the rotation of the traction device 210. Alternatively, the portion of the abutting member 320 between the abutting portion 322b and the traveling portion 323a can be bent and offset on one radial side of the traction device 210. In this solution, the concave-convex surface can be formed at one end of the guide member 310 facing the traction device 210 or at one end of the guide member 310 facing away from the traction device 210. The position of the traveling portion 323a corresponding to the concave-convex surface is adjusted specifically. Or in another embodiment, the guide member 310 and the abutting member 320 are arranged on the same side of the traction device 210 in its axial direction. Specifically, the concave-convex surface of the guide member 310 can be arranged facing away from the traction device 210. It can also be as Figures 1 to 6 shown in the embodiment, the concave-convex surface of the guide member 310 is arranged facing the traction device 210.

[0044] In addition, the guide member 310 and the housing can also be movably connected in terms of orientation adjustment. When the housing includes two housing plates 110 axially assembled as described above, the guide member 310 is movably connected to the adjacent housing plate 110. Specifically, at this time, the two can be movably connected in any radial direction of the traction device 210, so that the abutting positions between the guide member 310 and the abutting member 320, and between the abutting member 320 and the traction device 210 are adjustable in the radial direction. Or the two can also be movably connected in the axial direction of the traction device 210, so that the abutting positions between the guide member 310 and the abutting member 320, and between the abutting member 320 and the traction device 210 are adjustable in the axial direction.

[0045] Of course, a fixed connection with an unchanged orientation can be established between the guide member 310 and the housing. When the housing includes two housing plates 110 assembled axially as described above, the guide member 310 is fixedly connected to the adjacent housing plate 110. At this time, the guide member 310 and the housing plate 110 can be two separate structures independently arranged, and after being formed separately, they are detachably or non-detachably connected and fixed. Or the guide member 310 and the housing plate 110 can be integrally formed, for example, the guide member 310 is directly defined by at least a part of the housing plate 110. In this way, on the one hand, the overall structure of the abutting mechanism 300 can be made simpler; on the other hand, there is no need to reserve extra space between the tractor 210 and the housing plate 110 for arranging the guide member 310, making the overall structure of the external operating body more compact.

[0046] Under the drive of an external force, the traveling part 323a in the abutting member 320 has at least a moving stroke relative to the guide member 310, and specifically travels along the concave-convex surface. The arrangement of the above-mentioned first convex surface 312, second convex surface 313 and concave surface 311 is not limited, and can be specifically adjusted according to actual needs, for example, according to the holding and operating habits of the operator. Generally, in actual application, the concave surface 311, the first convex surface 312 and the second convex surface 313 are arranged in sequence along a certain preset direction, so that when the traveling part 323a travels along this preset direction under the drive of an external force, it can drive the abutting part 322b to exert a gradually increasing abutting pressure on the tractor 210, that is, form a gradually increasing locking.

[0047] The above-mentioned preset direction can be a straight line direction, an arc direction, or a combination of a straight line direction and an arc direction. That is, the movement mode of the traveling part 323a relative to the concave-convex surface is not limited, and it can be translation or rotation. Specifically, such as Figures 1 to 6As shown, in one embodiment, the guide member 310 axially penetrates through the traction device 210 with a connection hole 316, and the concave-convex surface extends along the outer periphery of the connection hole 316; the abutting member 320 further includes a connection portion 322a movably penetrating through the connection hole 316, and a holding portion 321a connected to the connection portion 322a and extending out of the installation cavity. When the holding portion 321a is operated by an external force to rotate around the connection portion 322a, the traveling portion 323a is driven to move on the concave-convex surface. When the guide member 310 is directly defined by the housing plate 110, the connection hole 316 is also a hole structure directly penetrating through the housing plate 110. At this time, the holding portion 321a is located outside the housing to facilitate the operator's holding and operation. The connection portion 322a extends in a long shape substantially along the rotation axis of the whole abutting member 320 and is disposed through the connection hole 316. The traveling portion 323a and the abutting portion 322b are both connected to the connection portion 322a and are located in the installation cavity. The size of the holding portion 321a is generally set to be larger than the aperture of the connection hole 316, so that the holding portion 321a can maintain its extension outside the installation cavity. Correspondingly, the size of the abutting portion 322b and / or the traveling portion 323a can also be set to be larger than the aperture of the connection hole 316 to ensure that the abutting portion 322b and the traveling portion 323a will not come out of the connection hole 316 outwardly.

[0048] Based on the above, the holding portion 321a in the abutting mechanism 300 and the operating member 220 in the traction mechanism 200 are both disposed outside the housing. However, since the holding portion 321a protrudes axially along the traction device 210 and the operating member 220 protrudes radially along the traction device 210, the holding portion 321a and the operating member 220 are significantly staggered in orientation, avoiding misoperation by the operator. And / or more specifically, the structures of the operating member 220 and the holding portion 321a can be set differently. That is, the operating member 220 and the holding portion 321a are differentiated in one or several aspects such as shape, operation mode, size, color, material, etc. The abutting mechanism 300 and the traction mechanism 200 are disposed adjacent to each other, which enables the holding portion 321a and the operating member 220 to be distinguished from each other, but at the same time are also disposed as close as possible, facilitating the operator to operate the holding portion 321a and / or the operating member 220 to move with one hand when holding the external operating body.

[0049] When the whole abutting member 320 rotates around its own axis, correspondingly, the concave surface 311, the first convex surface 312, and the second convex surface 313 are sequentially arranged along the same circumferential direction of the connection hole 316, that is, the concave surface 311, the first convex surface 312, and the second convex surface 313 are sequentially located on the rotation trajectory of the traveling portion 323a, and the traveling portion 323a can sequentially travel on the concave surface 311, the first convex surface 312, and the second convex surface 313 when being driven to rotate.

[0050] The concave surface 311, the first convex surface 312, and the second convex surface 313 are each in surface contact with the traveling part 323a as much as possible. That is, when the traveling part 323a is specifically a plane or a curved surface, the concave surface 311, the first convex surface 312, and the second convex surface 313 provide sufficient sliding surfaces for the traveling part 323a to perform sliding fit. Or when the traveling part 323a is specifically a ball or a rotating shaft, the concave surface 311, the first convex surface 312, and the second convex surface 313 provide sufficient rolling surfaces for the traveling part 323a to perform rolling fit. In order to make the transition between the concave surface 311, the first convex surface 312, and the second convex surface 313 smoother, specifically, the concave surface 311, the first convex surface 312, and the second convex surface 313 are smoothly connected to each other through inclined surfaces or arc surfaces respectively. In this way, the traveling part 323a can stay at the concave surface 311, the first convex surface 312, and the second convex surface 313 respectively under the drive of a certain external force, but can also walk from the concave surface 311 to the first convex surface 312, or from the first convex surface 312 to the second convex surface 313 under the drive of a greater external force.

[0051] As described above, since the entire abutting member 320 rotates around its own axis, the concave surface 311, the first convex surface 312, and the second convex surface 313 are arranged in sequence along the same circumferential direction of the connecting hole 316. Specifically, if the concave surface 311, the first convex surface 312, and the second convex surface 313 are combined to form a surface group: in one application, the surface group can be set to one, and one surface group is arranged on the entire outer circumference of the connecting hole 316. Or in one application, the surface group can be set to two, and two surface groups are arranged on the entire outer circumference of the connecting hole 316. Or in one application, the surface group can be set to more than two, and each surface group is arranged in sequence on the entire outer circumference of the connecting hole 316.

[0052] Taking the above-mentioned surface groups set to two as an example, at this time, between the two concave surfaces 311 of the two surface groups, between the two first convex surfaces 312, and between the two second convex surfaces 313, they are respectively centrosymmetrically arranged with respect to the connecting hole 316. Correspondingly, the traveling part 323a can be set to one. After the traveling part 323a travels successively on the concave surface 311, the first convex surface 312, and the second convex surface 313 in the upper surface group, it continues to travel successively on the concave surface 311, the first convex surface 312, and the second convex surface 313 in the lower surface group. During a single rotation of the abutting part 320, the whole machine cycles twice among the unlocked state, the semi-locked state, and the fully locked state. Or correspondingly, the traveling part 323a can be set to two. The two traveling parts 323a protrude respectively on the radial two sides of the connecting part 322a, that is, the two traveling parts 323a correspond one-to-one with the two surface groups, so that when the abutting part 320 rotates, the two traveling parts 323a synchronously travel successively on the concave surface 311, the first convex surface 312, and the second convex surface 313 in the two surface groups. During a half rotation of the abutting part 320, the whole machine goes through the unlocked state, the semi-locked state, and the fully locked state once. The setting of the two traveling parts 323a helps to make the movement of the whole abutting part 320 relative to the guiding part 310 more stable and is more conducive to stably transmitting the acting force.

[0053] In addition, the present application also does not limit the specific protruding height differences and other parameters among the above-mentioned first convex surface 312, second convex surface 313, and concave surface 311. For example Figure 5 In a specific structure shown, the circumferential arc lengths of the concave surface 311, the first convex surface 312, and the second convex surface 313 can all be set to 30°, forming an area large enough for the traveling part 323a to abut. Then, inclined transition surfaces are respectively formed between the concave surface 311 and the first convex surface 312, and between the first convex surface 312 and the second convex surface 313. The circumferential arc lengths of the two transition surfaces can specifically be set to 25°, which helps the traveling part 323a to switch more smoothly between the two concave and convex surface areas. The height differences between the concave surface 311 and the first convex surface 312, and between the second convex surface 313 and the second convex surface 313 can be set to 0.3 mm respectively, so as to achieve the purpose that when the traveling part 323a travels to the concave surface 311, it is in the unlocked state; when the traveling part 323a travels to the first convex surface 312, it is in the semi-locked state; and when the traveling part 323a travels to the second convex surface 313, it is in the fully locked state.

[0054] The concave surface 311, the first convex surface 312, and the second convex surface 313 in one or more of the above embodiments do not constitute specific limitations on the overall structure of the concave-convex surface. That is to say, the concave-convex surface can be composed only of the above concave surface 311, the first convex surface 312, and the second convex surface 313; or in addition to the above concave surface 311, the first convex surface 312, and the second convex surface 313, the concave-convex surface can also be provided with other structures according to actual needs. For example, in a specific application, the concave-convex surface further includes a third convex surface 314. The protruding height of the third convex surface 314 is greater than that of the second convex surface 313, and a stop surface 315 is formed at the connection between the two. The stop surface 315 circumferentially stops the walking part 323a. That is to say, it can be understood that under the external force driving lower than the preset threshold, the walking part 323a can walk from the concave surface 311 to the first convex surface 312, and can also walk from the first convex surface 312 to the second convex surface 313, but cannot walk from the second convex surface 313 to the third convex surface 314 and will be stopped and limited by the stop surface 315.

[0055] It should be noted that when the third convex surface 314 is provided as described above, the concave surface 311, the first convex surface 312, the second convex surface 313, and the third convex surface 314 can form a surface group. For specific embodiments of the surface group, reference can be made to the above.

[0056] In addition, the abutting part 322b abuts against the axial end surface of the tractor 210 to cause different degrees of interference to the rotation of the tractor 210. Specifically, the abutting part 322b is eccentrically arranged at the axial end surface of the tractor 210. That is to say, the connection between the abutting part 322b and the axial end surface of the tractor 210 does not coincide with the axis of the tractor 210. In this way, when the abutting part 322b applies force to the axial end surface of the tractor 210, a force arm can be formed relative to the axis of the tractor 210, and then a sufficient torque can be formed. Further, the abutting part 322b is arranged closer to the outer peripheral edge of the tractor 210 relative to the axis of the tractor 210. In this way, the above-mentioned force arm can be extended as much as possible within a limited space.

[0057] As much as possible, a surface contact is made between the abutting part 322b and the axial end surface of the tractor 210. That is to say, the abutting part 322b preferably appears as a plane or an arc surface with a sufficient abutting area, so that the abutting pressure transmitted from the abutting part 322b to the tractor 210 is more evenly distributed, and excessive stress concentration is avoided between the abutting part 322b and the axial end surface of the tractor 210, resulting in structural damage.

[0058] The walking part 323a in the above is preferably set to have sufficient stiffness, and then sufficient structural strength and wear resistance can be formed to avoid structural wear between the walking part 323a and the guiding part, resulting in the failure of force transmission.

[0059] The specific form of the abutment member 320 is not limited. Figures 1 to 6 In the structure shown, the abutting member 320 may include a first shaft 322, a toggle member 321, and a second shaft 323. The shaft section of the first shaft 322 passing through the connecting hole 316 constitutes a connecting portion 322a, and at least the shaft end of the first shaft 322 extending into the installation cavity constitutes an abutting portion 322b. The first shaft 322 is provided with a shaft hole radially between the connecting portion 322a and the abutting portion 322b; the toggle member 321 is disposed outside the housing 100 and is non-rotatably connected to the shaft section of the first shaft 322 extending out of the connecting hole 316, and the toggle member 321 constitutes a holding portion 321a; the second shaft 323 passes through the shaft hole, and the outer peripheral side wall of the second shaft 323 constitutes a walking portion 323a.

[0060] It should be noted that the first shaft body 322 and the second shaft body 323 can be integrally formed, and in this case, the first shaft body 322 and the second shaft body 323 can be assembled in place without the above-mentioned shaft hole. Alternatively, the first shaft body 322 and the second shaft body 323 can be detachably or non-detachably connected after being separately formed. The above-mentioned dial knob 321 is also a specific form of the holding portion 321a, which drives the rotation of the top member 320 by the operator's dialing. In other applications, according to actual needs, the dial knob 321 can also be replaced by, for example, a knob, a pressing member, etc., without limitation.

[0061] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An external operating body, applied to an endoscope, characterized in that The external operating body includes: a housing, forming an installation cavity; a traction mechanism, including a tractor rotatably installed in the installation cavity around its own axis, and a traction wire movably wound around the outer periphery of the tractor, a free section of the traction wire extending outward from the installation cavity and connecting to an intervention component of the endoscope, so as to be driven to move during the rotation of the tractor, such that the intervention component can be bent laterally; and, a pressing mechanism, including a guiding member and a pressing member arranged in sequence along the axial direction of the tractor, one axial end surface of the guiding member being an uneven surface, the uneven surface including a first convex surface, a second convex surface, and a concave surface, the protruding height of the second convex surface along the axial direction being greater than the protruding height of the first convex surface, the pressing member including a walking portion movably traveling at the uneven surface and a pressing portion abutting against the axial end surface of the tractor, under the drive of an external force, the walking portion can movably travel at the first convex surface, the second convex surface, and the concave surface respectively, so as to drive the pressing portion to adjust the axial pressing force on the tractor.

2. The external operating body according to claim 1, wherein The guiding member and the pressing member are arranged on the same side of the tractor in its axial direction.

3. The external operating body according to claim 1, characterized in that, The guiding member is axially penetrated with a connection hole, and the uneven surface extends and is arranged along the outer periphery of the connection hole; The pressing member further includes a connection portion movably penetrating through the connection hole, and a holding portion connected to the connection portion and extending outside the installation cavity, by operating the holding portion to rotate around the connection portion with an external force, so as to drive the walking portion to move and travel at the uneven surface.

4. The external operating body according to claim 3, characterized in that, The concave surface, the first convex surface, and the second convex surface are sequentially arranged along the same circumferential direction of the connection hole in sequence; The concave surface, the first convex surface, and the second convex surface are respectively smoothly connected by an inclined surface or an arc surface between two of them.

5. The external operating body according to claim 4, characterized in that, The uneven surface further includes a third convex surface, the protruding height of the third convex surface being greater than the protruding height of the second convex surface, and a stop surface being formed at the connection between the two, the stop surface performing circumferential stop on the walking portion.

6. The external operating body according to any one of claims 3 to 5, characterized in that The concave surface, the first convex surface, and the second convex surface are respectively provided with two groups on the outer circumference of the connection hole, and the two concave surfaces, the two first convex surfaces, and the two second convex surfaces between the two groups are respectively centrosymmetrically arranged with respect to the connection hole; The holding portion, the connection portion, and the pressing portion are sequentially connected along the axial direction of the tractor, two walking portions are correspondingly provided, and the two walking portions respectively protrude on the radial two sides of the connection portion.

7. The external operating body according to claim 1, characterized in that, The pressing portion is eccentrically arranged at the axial end surface of the tractor.

8. The external operating body according to claim 7, characterized in that, The pressing portion is arranged closer to the outer peripheral edge of the tractor relative to the axis of the tractor.

9. The external operating body according to claim 1, characterized in that, A part of the shell plate of the housing constitutes the guiding member.

10. An endoscope, characterized in that, including: an intervention component; and, an external operating body according to any one of claims 1 to 9.

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