Bending adjusting device capable of being laterally locked and endoscope

Abstract

The utility model discloses a lateral locking bend adjusting device and an endoscope, the lateral locking bend adjusting device comprises a bend adjusting assembly and a locking assembly, the bend adjusting assembly comprises a pull wire, a rotatable winding wheel and an adjusting hand wheel, the adjusting hand wheel and the winding wheel are coaxially installed, and the pull wire is wound on the winding wheel; the locking assembly comprises an interference part and an eccentric wheel, the interference part comprises an interference section, a mounting section and a driving section, the interference section is arranged on the radial side of the winding wheel, the driving section is arranged on the radial side of the eccentric wheel, the mounting section and the eccentric wheel are rotatably arranged around the axis extending in the longitudinal direction, and under external force driving, the wheel face of the eccentric wheel abuts against the driving section. The interference section is driven to have an interference state and an unlocking state; the wheel face of the eccentric wheel comprises at least three wheel face sections, and the radiuses of the wheel face sections are different. According to the utility model, the locking acting force does not generate adverse effects on the connection state of the two shell plates, and the use reliability of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a bending adjustment device capable of being locked laterally and an endoscope. Background Art

[0002] Various existing endoscopes generally include an operating body and an insertion tube. Among them, the insertion tube is used to be inserted into the patient's body to the affected part; the operating body is external and is used by medical staff to operate the insertion tube to observe, inspect and treat the affected part in the patient's body. In actual application, the head end of the insertion tube is provided with the required imaging devices and lighting devices, etc. In order to assist in treatment, the insertion tube needs to be bent laterally to a certain angle, and the bending angle needs to be locked and fine-tuned to adjust the head end to a preset posture. In order to achieve locking adjustment, some existing endoscopes use a mechanism that longitudinally presses two winding wheels to achieve locking. The direction of the longitudinal pressing force is consistent with the connection direction between the two shell plates of the shell of the operating body. If the pressing force is too large, it is easy to cause the two shell plates to detach; on the contrary, if the pressing force is too small, it will cause the locking effect to be poor or even fail, making the locking adjustment inconvenient and reducing the reliability of use. Utility Model Content

[0003] The main purpose of the utility model is to provide a bending adjustment device and an endoscope that can be locked laterally, aiming to solve the problem that the unreasonable design of the locking mechanism in traditional endoscopes leads to inconvenient locking and adjustment and reduced reliability of use.

[0004] To achieve the above-mentioned purpose, the present invention provides a lateral locking bending adjustment device, comprising:

[0005] A bending adjustment assembly includes a traction line, a winding wheel and an adjustment handwheel, each of which is rotatably arranged around an axis extending longitudinally. The traction line is wound around the winding wheel, and the adjustment handwheel is coaxially installed with the winding wheel. Under external force, the adjustment handwheel drives the winding wheel to rotate synchronously to flexibly reel in and release the traction line; and

[0006] The locking assembly comprises an interference member and an eccentric wheel, the interference member comprises an interference section, a mounting section and a driving section connected in sequence, the interference section is arranged on a radial side of the winding wheel, the driving section is arranged on a radial side of the eccentric wheel, the mounting section and the eccentric wheel are respectively rotatable around an axis extending in the longitudinal direction, and under the drive of an external force, the wheel surface of the eccentric wheel pushes the driving section to drive the interference section to rotate toward the winding wheel to an interference state in which the interference section pushes the wheel surface of the winding wheel, and rotate away from the winding wheel to an unlocked state in which the interference section is separated from the wheel surface of the winding wheel;

[0007] The wheel surface of the eccentric wheel includes at least three wheel surface segments connected in sequence along its circumference, and the radius of each wheel surface segment is set differently.

[0008] Optionally, one of the wheel surface segments is the first wheel surface segment. When the first wheel surface segment rotates to push the driving segment, the interference segment is driven to rotate to the unlocked state; when the remaining wheel surface segments rotate to push the driving segment respectively, the interference segments are driven to rotate to the interference states with different degrees of interference.

[0009] Optionally, the bending adjustment assembly further includes an elastic ring protruding from the outer side of the wheel surface of the winding wheel;

[0010] The remaining wheel surface segments except the first wheel surface segment include a second wheel surface segment and a third wheel surface segment. When the second wheel surface segment is rotated to push the driving segment, the interference segment is driven to push the elastic ring; when the third wheel surface segment is rotated to push the driving segment, the interference segment is driven to push the elastic ring and the wheel surface of the winding wheel at the same time.

[0011] Optionally, the driving segment has an abutment surface that is in rotational abutment with each of the wheel surface segments, and the abutment surface is in the shape of a flat surface;

[0012] The first wheel surface segment and the second wheel surface segment respectively extend along the circumference of the eccentric wheel and are in the shape of straight surfaces, and the third wheel surface segment is in the shape of a convex arc surface along the circumference of the eccentric wheel.

[0013] Optionally, the interference section has an interference surface arranged toward the wheel surface of the winding wheel, and a groove is concavely provided on the interference surface corresponding to the elastic ring.

[0014] Optionally, the interference section has an interference surface arranged toward the wheel surface of the winding wheel, and the interference surface extends along the circumference of the winding wheel to be in the shape of a concave arc surface.

[0015] Optionally, the locking assembly further includes an operating member, one end of which is coaxially arranged with the eccentric wheel and is connected to each other for rotation prevention, and the other end extends along a radial direction of the eccentric wheel and then bends and extends longitudinally to form a bending section, at least the bending section is used to receive an external driving force.

[0016] Optionally, at least two bending adjustment components are sequentially provided in the longitudinal direction, and at least two interference sections in the locking component are correspondingly provided;

[0017] Each interference section is driven to rotate by the same eccentric wheel; or,

[0018] At least two of the interference sections are driven to rotate by different eccentric wheels.

[0019] Optionally, at least two bending adjustment assemblies are sequentially provided in the longitudinal direction, at least two interference sections in the locking assembly are correspondingly provided, and each interference section is driven to rotate by the same eccentric wheel;

[0020] When each of the remaining wheel surface segments except the first wheel surface segment rotates to push the driving segment, it synchronously drives the interference segments to rotate to the interference state with the same interference degree; or drives at least two interference segments to rotate to the interference state with different interference degrees.

[0021] In addition, to achieve the above-mentioned purpose, the present invention also provides an endoscope, comprising an operating body and an insertion tube protruding from one lateral end of the operating body;

[0022] The operating body includes a shell and the laterally lockable bending adjustment device as described above, the shell includes at least two shell plates that are detachably connected along the longitudinal direction, the laterally lockable bending adjustment device is installed on the shell, the traction line is passed through the insertion tube, and the end of the traction line away from the winding wheel is connected and fixed to the radial side wall of the insertion tube, and when the winding wheel movably reels the traction line, it drives the insertion tube to bend toward the side where the traction line is connected.

[0023] In the technical solution provided by the present invention, after the laterally lockable bending adjustment device is applied to the endoscope, the medical staff can drive the winding wheel to rotate in the same direction by operating the adjusting hand wheel to rotate in one direction, and flexibly reel in the traction line, that is, drive the connection between the traction line and the insertion tube to be laterally forceful backward, thereby realizing lateral bending adjustment of the insertion tube; on the contrary, the medical staff operates the adjusting hand wheel to rotate in the opposite direction, drives the winding wheel to rotate in the same direction, and flexibly releases the traction line, that is, cancels the external force applied to the connection between the traction line and the insertion tube, thereby realizing resetting of the insertion tube; and the medical staff can drive the side wheel surfaces thereof to push the driving section respectively by operating the eccentric wheel to rotate in one direction, and drive the interference section to rotate toward and away from the winding wheel; due to the eccentric wheel The radii of the wheel surface sections at least on three sides are different, which means that at least three different resisting forces can be applied to the driving section, which in turn drives the interference section to apply different resisting forces to the wheel surface of the winding wheel, thereby achieving different degrees of interference during the rotation of the winding wheel, and realizing different degrees of locking adjustment when the insertion tube is bent sideways; in addition, since the locking components are all arranged on the radial side of the bending adjustment component, that is, the direction of the locking force applied to the bending adjustment component is roughly staggered with the longitudinal direction, so that when the two shell plates of the shell are detachably connected along the longitudinal direction, the locking force will not have an adverse effect on the connection state of the two shell plates, thereby avoiding reducing the stability of the connection between the two shell plates, and ultimately helping to improve the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the partial structure of an embodiment of the endoscope provided by the present invention;

[0026] Figure 2 for Figure 1 A three-dimensional diagram of the central endoscope after the shell plate is disassembled;

[0027] Figure 3 for Figure 2 A three-dimensional schematic diagram of a laterally lockable bending adjustment device;

[0028] Figure 4 for Figure 3 A longitudinal sectional view of a laterally lockable bending adjustment device;

[0029] Figure 5 for Figure 3 A three-dimensional schematic diagram of the middle locking assembly;

[0030] Figure 6 for Figure 5 Schematic diagram of the main structure of the locking assembly.

[0031] Description of Figure Numbers:

[0032] 100 operating body; 110 shell; 111 shell plate; 120 positioning protrusion; 130 mounting shaft; 140 first through hole; 150 second through hole; 200 bending adjustment assembly; 211 first winding wheel; 212 second winding wheel; 221 first adjusting hand wheel; 222 second adjusting hand wheel; 231 first elastic ring; 232 second elastic ring; 240 positioning hole; 300 locking assembly; 310 interference member; 311 interference section; 311a interference surface; 311b groove; 312 mounting section; 312a shaft hole; 313 driving section; 313a abutting surface; 320 eccentric wheel; 321 first wheel surface section; 322 second wheel surface section; 323 third wheel surface section; 330 operating member; 331 connecting section; 332 bending section.

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] See also Figures 1 to 6The utility model provides a bending adjustment device that can be locked laterally. The bending adjustment device that can be locked laterally includes a bending adjustment component 200 and a locking component 300. Among them, the bending adjustment component 200 includes a traction line, a winding wheel and an adjusting hand wheel that are rotatable around an axis extending longitudinally. The traction line is wound around the winding wheel. The adjusting hand wheel is coaxially installed with the winding wheel. Under the drive of an external force, the adjusting hand wheel drives the winding wheel to rotate synchronously to flexibly reel in and release the traction line; the locking component 300 includes an interference member 310 and an eccentric wheel 320. The interference member 310 includes an interference section 311, an installation section 312 and a driving section 313 connected in sequence. The interference section 311 is arranged on the radial side of the winding wheel, and the driving section 313 is arranged on the radial side of the winding wheel. 313 is arranged on the radial side of the eccentric wheel 320, and the mounting section 312 and the eccentric wheel 320 are rotatable around the axis extending in the longitudinal direction respectively. Under the drive of external force, the wheel surface of the eccentric wheel 320 pushes the driving section 313 to drive the interference section 311 to rotate toward the winding wheel to the interference state of pushing the wheel surface of the winding wheel, and rotate away from the winding wheel to the unlocked state of separation from the wheel surface of the winding wheel; wherein, the wheel surface of the eccentric wheel 320 includes at least three wheel surface segments connected in sequence along its circumference, and the radius of each of the wheel surface segments is set differently.

[0038] In actual application, the laterally lockable bending adjustment device is generally used in an endoscope. There is no restriction on the type of endoscope, and it can be, but is not limited to, an endoscope. The endoscope includes an operating body 100 and an insertion tube protruding from one lateral end of the operating body 100. The operating body 100 includes a shell 110 and the above-mentioned laterally lockable bending adjustment device, and the shell 110 includes at least two shell plates 111 that are detachably connected in the longitudinal direction. When connected, the shell plates 111 jointly enclose and define an installation cavity. The laterally lockable bending adjustment device is at least partially accommodated in the installation cavity.

[0039] The end of the insertion tube away from the operating body 100 is the tip. Depending on actual needs, the tip may be integrated with, for example, an imaging device and / or an illumination device. The imaging device captures images of the affected area as the insertion tube is inserted into the patient's body. The illumination device illuminates the affected area.

[0040] In order to better adjust the position and orientation of the head end, the insertion tube is generally configured to be able to bend and deform laterally and to be reset. The traction line in the bending adjustment component 200 is arranged in the insertion tube at one end away from the winding wheel, and extends toward the head end to be connected and fixed to the radial side wall of the insertion tube adjacent to the head end, so that when the traction line is driven to be reeled, the lateral bending of the insertion tube is controlled, and when it is driven to be released, the insertion tube is controlled to be reset. It should be noted that the same winding wheel can generally be used for winding two traction lines together, or for winding the middle section of the same traction line, and then two traction sections are led out. The two traction sections are arranged in the insertion tube and are respectively connected and fixed to the radial side walls of the insertion tube, so as to realize the separate control of the radial bending of the insertion tube.

[0041] In the technical solution provided by the present invention, medical staff can drive the wheel surface of each side to push the driving section 313 respectively by operating the eccentric wheel 320 to rotate in one direction, and drive the interference section 311 to rotate toward and away from the winding wheel; because the radius of the wheel surface sections at least on three sides of the eccentric wheel 320 is different, at least three different pushing forces can be applied to the driving section 313, and then drive the interference section 311 to apply different pushing forces to the wheel surface of the winding wheel, so as to achieve different degrees of interference in the rotation process of the winding wheel. In addition, since the locking components 300 are all arranged on the radial side of the bending adjustment component 200, that is, the direction of the locking force applied to the bending adjustment component 200 is roughly staggered with the longitudinal direction, when the two shell plates 111 of the shell 110 are detachably connected along the longitudinal direction, the locking force will not have an adverse effect on the connection state of the two shell plates 111, thereby avoiding reducing the stability of the connection between the two shell plates 111, and ultimately helping to improve the reliability of the product.

[0042] Specifically, please combine Figures 1 to 3 At least one shell plate 111 is longitudinally penetrated by a first through-hole 140 that connects to the mounting cavity. The winding reel and traction line in the bending adjustment assembly 200 are both housed within the mounting cavity. The adjustment handle and the winding reel are coaxially connected via a longitudinally extending connecting shaft. This connecting shaft passes through the first through-hole 140, allowing the adjustment handle to be exposed and mounted outside the shell 110, making it convenient for medical personnel to manually rotate the adjustment handle while holding the operating body 100.

[0043] One of the housing 110 and the bend adjustment assembly 200 may be provided with a positioning protrusion 120, while the other may be provided with a positioning hole 240. The positioning protrusion 120 is inserted into the positioning hole 240, facilitating the positioning and installation of the bend adjustment assembly 200 on the housing 110. The positioning protrusion 120 may extend longitudinally in an elongated shape, while the positioning hole 240 is correspondingly provided longitudinally. When the two are interlaced and matched, they also help stabilize the bend adjustment assembly 200 in the transverse direction, preventing lateral offset of the bend adjustment assembly 200 during installation on the housing 110, which could affect the accuracy and stability of the insertion tube's lateral bend adjustment.

[0044] In addition, the eccentric wheel 320 is rotatably mounted on the housing 110 about an axis extending in the longitudinal direction. In actual use, the eccentric wheel 320 can also be at least partially exposed outside the housing 110, similar to the adjustment handwheel described above, for manual rotation by medical personnel. However, in order to avoid interference between the rotation drive of the eccentric wheel 320 and the rotation drive of the adjustment handwheel in structural design and operation, in one embodiment, the locking assembly 300 further includes an operating member 330. One end of the operating member 330 is coaxially arranged with the eccentric wheel 320 and is connected to each other for rotation prevention. The other end extends along a radial direction of the eccentric wheel 320 and then bends and extends in the longitudinal direction to form a bent section 332. At least the bent section 332 is used to receive an external driving force.

[0045] Among them, a section of the operating member 330 extending radially from the eccentric wheel 320 is a connecting section 331. The connecting section 331 and the eccentric wheel 320 can be integrally formed, or can be detachably or non-detachably connected after being separately formed. When the two are detachably connected, specifically, a rotation-stopping recess is provided at the center axis of the eccentric wheel 320 and one of the connecting sections 331, and a rotation-stopping protrusion is provided at the other. The rotation-stopping protrusion is inserted and connected with the rotation-stopping recess, and can generate mutual limitation in the rotation direction of the two, thereby avoiding relative rotational movement between the eccentric wheel 320 and the operating member 330, thereby helping the medical staff to more accurately transmit the force to the eccentric wheel 320 when applying force to the bending section 332.

[0046] Specifically, at least one shell plate 111 is provided with a second through hole 150 along a radial direction of the eccentric wheel 320, and the second through hole 150 is connected to the installation cavity. The interference member 310 and the eccentric wheel 320 in the locking assembly 300 are both arranged in the installation cavity, and at least part of the connecting section 331 of the operating member 330 is passed through the second through hole 150, so that the bending section 332 is exposed outside the shell 110, making it convenient for medical personnel to manually turn the bending section 332 after holding the shell 110 to drive the eccentric wheel 320 to rotate. By leading the bending section 332 out laterally in this way, while still being able to drive the eccentric wheel 320 to rotate, it helps to distinguish the position of the bending section 332 and the aforementioned adjustment hand wheel to avoid mutual interference.

[0047] Based on one or more of the above embodiments, the interference member 310 is generally elongated, wherein the interference section 311 is disposed on one radial side of the reel and can specifically extend in an arc shape along the circumference of the reel or in a straight line along the tangent direction of the reel.

[0048] The interference section 311 has an interference surface 311a facing the reel surface. When the interference section 311 is rotated to the interference state, the interference surface 311a contacts the reel surface, creating an interference effect between the two that affects the reel's rotation. The greater the degree of this interference effect, the greater the resistance to the reel's rotation, achieving varying degrees of locking. Conversely, the less the interference effect, the less resistance to the reel's rotation, ultimately achieving unlocking.

[0049] The interference surface 311a extends along the circumference of the winding wheel in a concave arc shape, and the concave arc surface is roughly adapted to the shape of the wheel surface of the winding wheel at its position, so that when in the interference state, the area of ​​the abutment surface 313a between the interference surface 311a and the wheel surface of the winding wheel is increased as much as possible to achieve a better interference effect.

[0050] Furthermore, in one embodiment, the bending adjustment assembly 200 further includes an elastic ring protruding from the outer surface of the reel. The elastic ring is a structural member made of an elastic material that has elastic deformation capability at least in the radial direction of the reel. The elastic ring can be disposed along the entire circumference of the reel to facilitate molding and installation; alternatively, the elastic ring can extend in an arc shape along the circumference of the reel, with the extension length of the elastic ring along the circumference of the reel being preferably not less than the length of the interference surface 311a.

[0051] When the interference section 311 is in the unlocked state, the interference surface 311a and the elastic ring and the wheel surface of the winding wheel remain separated and are not subjected to force from each other. The elastic ring is in a naturally relaxed state and protrudes from the wheel surface of the winding wheel, and there is no interference between it and the interference surface 311a, thus achieving the unlocking purpose.

[0052] When the interference section 311 rotates until the interference surface 311a pushes against the elastic ring but remains separated from the reel surface, the elastic ring deforms to a certain extent due to the squeezing force, and a first interference effect of a first degree is generated between the elastic ring and the interference surface 311a. This first interference effect slightly locks the rotation of the reel, achieving a semi-locked interference state.

[0053] As the interference section 311 continues to rotate, the interference surface 311a continuously pushes against the elastic ring. After the elastic ring is deformed to its maximum extent by the extrusion force, the interference surface 311a pushes against the reel surface. This creates a second interference effect with the elastic ring and the reel surface, respectively, with a second degree of interference. This second degree of interference is significantly stronger than the first. This second interference effect completely locks the reel's rotational state, achieving a fully locked interference state.

[0054] Of course, in actual application, by adjusting the interference degree between the interference surface 311a and the elastic ring, more locking degrees can be divided between the above-mentioned semi-locked interference state and the fully locked interference state, without limitation.

[0055] In view of the aforementioned arrangement of the elastic ring, the interference surface 311a may further include a recessed groove 311b at the location corresponding to the elastic ring. The width of the recessed groove 311b roughly matches the width of the elastic ring. When the interference section 311 rotates until the interference surface 311a pushes against the elastic ring, the elastic ring at least partially engages within the recessed groove 311b. This not only helps increase the contact surface between the elastic ring and the interference surface 311a, but also helps secure the elastic ring and prevent it from shifting. Of course, the inner wall of the recessed groove 311b, at least where it contacts the elastic ring, may be configured as a circular surface or chamfered arc to prevent the formation of sharp structures that could squeeze the elastic ring.

[0056] The mounting section 312 is provided with an axial hole 312a extending longitudinally therethrough. A mounting shaft 130 is protruding from a corresponding position on the housing 110. The mounting section 312 is rotatably mounted on the mounting shaft 130 through the axial hole 312a, so that the interference section 311 and the driving section 313 form a lever structure. The mounting shaft 130 can be integrally formed with the housing plate 111, or can be separately formed and then connected in a detachable or non-detachable manner. Similarly, the interference section 311, the mounting section 312, and the driving section 313 can be integrally formed, or can be separately formed and then connected in a detachable or non-detachable manner.

[0057] The eccentric wheel 320 is disposed on one radial side of the winding wheel, and the driving section 313 is disposed on one radial side of the eccentric wheel 320 and has an abutment surface 313a facing the wheel surface of the eccentric wheel 320. The abutment surface 313a of the driving section 313 can also be configured to be a concave arc surface extending along the circumference of the eccentric wheel 320, or a straight surface extending along the tangential direction of the eccentric wheel 320, depending on actual needs.

[0058] It will be appreciated that, to achieve the above, the interference segment 311 can have an unlocked state, a partially locked interference state, and a fully locked interference state. The tread of the eccentric wheel 320 includes at least three tread segments connected sequentially along its circumference, each tread segment having a different radius. One of the tread segments is a first tread segment 321. When the first tread segment 321 rotates to abut the driving segment 313, it drives the interference segment 311 to rotate to an unlocked state. When the remaining tread segments rotate to abut the driving segment 313, they drive the interference segment 311 to rotate to interference states with different degrees of interference (i.e., equivalent to locking degrees). The remaining tread segments, except the first tread segment 321, can all drive the interference segment 311 to rotate to the interference state when they rotate to abut the driving segment 313. However, due to the different radii of the tread segments, when different tread segments rotate to abut the interference segment 311, the corresponding interference states of the interference segment 311 have different degrees of interference, thereby achieving the purpose of adjusting different locking degrees of the locking assembly 300.

[0059] Specifically, the remaining wheel surface segments other than the first wheel surface segment 321 include a second wheel surface segment 322 and a third wheel surface segment 323. When the second wheel surface segment 322 pushes against the drive segment 313, it drives the interference segment 311 to rotate to the first interference state mentioned above, that is, the interference surface 311a pushes against the elastic ring, but does not remain separated from the wheel surface of the winding wheel. The interference surface 311a can slightly lock the rotation state of the winding wheel, that is, it reaches a semi-locked interference state. When the third wheel surface segment 323 pushes against the drive segment 313, it drives the interference segment 311 to rotate to the second interference state, and the interference surface 311a continues to push against the elastic ring. After the elastic ring is deformed to the maximum extent by the extrusion force, the interference surface 311a pushes against the wheel surface of the winding wheel, which can completely lock the rotation state of the winding wheel, that is, it reaches a fully locked interference state.

[0060] Specifically, when the contact surface 313a is in the form of a flat surface as described above, the first wheel surface segment 321 and the second wheel surface segment 322 can be respectively extended along the circumference of the eccentric wheel 320 to form a flat surface, but the radius of the first wheel surface segment 321 is smaller than the radius of the second wheel surface segment 322. The third wheel surface segment 323 is in the form of a convex arc surface along the circumference of the eccentric wheel 320, and the radius of the third wheel surface segment 323 is larger than the radius of the second wheel surface segment 322. Figure 6As shown, the angle between the first wheel surface segment 321 and the second wheel surface segment 322 is an obtuse angle, which maximizes the smoothness of the transition from the first wheel surface segment 321 to the second wheel surface segment 322. By configuring the first wheel surface segment 321 and the second wheel surface segment 322 as flat surfaces, they can be tightly abutted against the abutment surface 313a, which is also configured as a flat surface, helping to maintain the interference segment 311 in the unlocked state and the semi-locked interference state. By configuring the third wheel surface segment 323 as a convex arc surface, and configuring the central angle of the third wheel surface segment 323 to be larger than the central angles of the first wheel surface segment 321 and the second wheel surface segment 322, the third wheel surface segment 323 can be maintained in contact with the abutment surface 313a within a large rotation angle range of the eccentric wheel 320, maintaining the interference segment 311 in the fully locked interference state.

[0061] In addition, based on one or more of the above embodiments, please combine Figures 1 to 4 At least two bending adjustment assemblies 200 can be provided. As described above, each bending adjustment assembly 200 can achieve two-way bending of the insertion tube. Taking the example of two bending adjustment assemblies 200, two bending adjustment assemblies 200 can achieve four-way bending of the insertion tube. For ease of understanding, the two winding wheels in the two bending adjustment assemblies 200 are respectively the first winding wheel 211 and the second winding wheel 212, and the two adjustment handwheels are respectively the first adjustment handwheel 221 and the second adjustment handwheel 222. The first winding wheel 211 and the first adjustment handwheel 221 are coaxially connected via a first connecting shaft; the second winding wheel 212 and the second adjustment handwheel 222 are coaxially connected via a second connecting shaft. In actual application, the second adjustment handwheel 222 is disposed on the side of the first adjustment handwheel 221 longitudinally away from the first winding wheel 211, and the second winding wheel 212 is disposed on the side of the first winding wheel 211 longitudinally away from the first adjustment handwheel 221. A plug hole is provided in the middle of the second connecting shaft along the longitudinal direction, and the first connecting shaft is passed through the plug hole, so that the two bending adjustment components 200 are arranged in sequence along the longitudinal direction.

[0062] When the elastic ring is provided as described above, the elastic ring protruding from the wheel surface of the first winding wheel 211 is the first elastic ring 231 , and the elastic ring protruding from the wheel surface of the second winding wheel 212 is the second elastic ring 232 .

[0063] Next, at least the interference section 311 in the locking assembly 300 is provided with at least two corresponding to each winding wheel:

[0064] In one design, each interference segment 311 can be driven to rotate by the same eccentric wheel 320. Each interference segment 311 can be connected to the same mounting segment 312 and / or the same driving segment 313. Alternatively, at least two of the interference segments 311 can be connected to different mounting segments 312 and / or different driving segments 313.

[0065] It should be noted that when each interference segment 311 is driven to rotate by the same eccentric wheel 320 , this does not constitute a limitation on whether the interference degree of each interference segment 311 with respect to its corresponding winding wheel is the same.

[0066] For example Figures 2 to 4 As shown, when the outer diameters of each winding wheel are consistent and the interference surfaces 311a of each interference segment 311 are located on the same longitudinal reference plane, the same eccentric wheel 320 drives each interference segment 311 to rotate at the same angle, and the push force of each interference surface 311a on the wheel surface of each winding wheel is consistent, and the degree of interference that can be generated is basically the same.

[0067] When the outer diameters of at least two winding wheels are different, and / or the interference surfaces 311a of at least two interference sections 311 are not on the same longitudinal reference plane, the same eccentric wheel 320 drives each interference section 311 to rotate at the same angle, and the thrust forces applied by at least two interference surfaces 311a on the wheel surfaces of the corresponding two winding wheels are different, and the degree of interference that can be generated is different.

[0068] Alternatively, in another design, at least two interference segments 311 are rotated by different eccentric wheels 320. Each interference segment 311 may be connected to the same mounting segment 312 and / or the same driving segment 313. Alternatively, at least two of the interference segments 311 may be connected to different mounting segments 312 and / or different driving segments 313.

[0069] Similarly, when at least two interference sections 311 are driven to rotate by different eccentric wheels 320 , this does not constitute a limitation on whether the interference degrees of the interference sections 311 with their corresponding winding wheels are the same.

[0070] For example, when all interference segments 311 are connected to the same mounting segment 312 and / or the same driving segment 313, the interference segments 311 are interlocked. In this case, the eccentrics 320 are arranged longitudinally in sequence. While different eccentrics 320 apply force to the driving segment 313 at different points, the driving effect on each interference segment 311 is essentially the same. If one eccentric 320 fails, the remaining eccentrics 320 can still ensure the normal operation of the locking assembly 300.

[0071] Alternatively, for example, when each interference segment 311 is connected by a different mounting segment 312 and a different driving segment 313, multiple independently operating locking assemblies 300 are formed. In this case, each locking assembly 300 can independently adjust the degree of locking of its respective winding reel. In other words, when each bending adjustment assembly 200 can bend the insertion tube in two different directions, each locking assembly 300 can independently lock and unlock the bending adjustment process in each direction, providing greater flexibility.

[0072] 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 transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lateral locking bending device, characterized in that: include: A bending adjustment assembly includes a traction line, a winding wheel and an adjustment handwheel, each of which is rotatably arranged around an axis extending longitudinally. The traction line is wound around the winding wheel, and the adjustment handwheel is coaxially installed with the winding wheel. Under external force, the adjustment handwheel drives the winding wheel to rotate synchronously to flexibly reel in and release the traction line; and The locking assembly comprises an interference member and an eccentric wheel, the interference member comprises an interference section, a mounting section and a driving section connected in sequence, the interference section is arranged on a radial side of the winding wheel, the driving section is arranged on a radial side of the eccentric wheel, the mounting section and the eccentric wheel are respectively rotatable around an axis extending in the longitudinal direction, and under the drive of an external force, the wheel surface of the eccentric wheel pushes the driving section to drive the interference section to rotate toward the winding wheel to an interference state in which the interference section pushes the wheel surface of the winding wheel, and rotate away from the winding wheel to an unlocked state in which the interference section is separated from the wheel surface of the winding wheel; The wheel surface of the eccentric wheel includes at least three wheel surface segments connected in sequence along its circumference, and the radius of each wheel surface segment is set differently.

2. The laterally lockable bending adjustment device according to claim 1, characterized in that: One of the wheel surface segments is the first wheel surface segment. When the first wheel surface segment rotates to push the driving segment, the interference segment is driven to rotate to the unlocked state; when the remaining wheel surface segments rotate to push the driving segment respectively, the interference segments are driven to rotate to the interference states with different degrees of interference.

3. The laterally lockable bending adjustment device according to claim 2, characterized in that: The bending adjustment assembly further includes an elastic ring protruding from the outer side of the wheel surface of the winding wheel; The remaining wheel surface segments except the first wheel surface segment include a second wheel surface segment and a third wheel surface segment. When the second wheel surface segment is rotated to push the driving segment, the interference segment is driven to push the elastic ring; when the third wheel surface segment is rotated to push the driving segment, the interference segment is driven to push the elastic ring and the wheel surface of the winding wheel at the same time.

4. The laterally lockable bending adjustment device according to claim 3, characterized in that: The driving section has an abutment surface that is in rotational abutment with each of the wheel surface sections, and the abutment surface is in the shape of a flat surface; The first wheel surface segment and the second wheel surface segment respectively extend along the circumference of the eccentric wheel and are in the shape of straight surfaces, and the third wheel surface segment is in the shape of a convex arc surface along the circumference of the eccentric wheel.

5. The laterally lockable bending adjustment device according to claim 3, characterized in that: The interference section has an interference surface arranged toward the wheel surface of the winding wheel, and a groove is concavely provided on the interference surface corresponding to the elastic ring.

6. The laterally lockable bending adjustment device according to claim 1, characterized in that: The interference section has an interference surface arranged toward the wheel surface of the winding wheel, and the interference surface extends along the circumference of the winding wheel to form a concave arc surface.

7. The laterally lockable bending adjustment device according to claim 1, characterized in that: The locking assembly also includes an operating member, one end of which is coaxially arranged with the eccentric wheel and is connected to each other for preventing rotation, and the other end extends along a radial direction of the eccentric wheel and then bends and extends longitudinally to form a bent section, at least the bent section is used to receive an external driving force.

8. The laterally lockable bending adjustment device according to any one of claims 1 to 7, characterized in that: At least two bending adjustment components are sequentially provided in the longitudinal direction, and at least two interference sections in the locking component are correspondingly provided; Each interference section is driven to rotate by the same eccentric wheel; or, At least two of the interference sections are driven to rotate by different eccentric wheels.

9. The laterally lockable bending adjustment device according to any one of claims 2 to 5, characterized in that: At least two bending adjustment assemblies are sequentially provided in the longitudinal direction, and at least two interference sections in the locking assembly are correspondingly provided, and each interference section is driven to rotate by the same eccentric wheel; When each of the remaining wheel surface segments except the first wheel surface segment rotates to push the driving segment, it synchronously drives the interference segments to rotate to the interference state with the same interference degree; or drives at least two interference segments to rotate to the interference state with different interference degrees.

10. An endoscope, characterized in that: It comprises an operating body and an insertion tube protruding from one lateral end of the operating body; The operating body includes a shell and a laterally lockable bending adjustment device as described in any one of claims 1 to 9, the shell includes at least two shell plates that are detachably connected along the longitudinal direction, the laterally lockable bending adjustment device is installed on the shell, the traction line is passed through the insertion tube, and the end of the traction line away from the winding wheel is connected and fixed to the radial side wall of the insertion tube, and when the winding wheel movably reels the traction line, it drives the insertion tube to bend toward the side where the traction line is connected.

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