Endoscope and bending adjustment driving mechanism of endoscope

Abstract

The invention relates to the field of endoscopes, in particular to a bending adjustment driving mechanism of an endoscope, and provides the endoscope and the bending adjustment driving mechanism of the endoscope. The bending adjusting driving mechanism of the endoscope comprises a winding wheel, a driving mechanism and a driving mechanism, the winding wheel is used for being assembled on an installation base body in a rotating mode, a winding wire is connected to the winding wheel, and the winding wheel is used for changing the winding amount of the winding wire during rotation; the movable pulley assembly comprises a movable pulley and a pulley mounting base, the winding wire is wound around the movable pulley, and the end, away from the winding wheel, of the winding wire is fixedly arranged relative to the mounting base body; the pulley mounting seat is provided with a traction connecting part, and the traction connecting part is used for being connected with a traction wire which is used for driving the bending adjusting section to bend in the endoscope. The technical problem that an operator is prone to fatigue when a bending adjusting section of an endoscope needs to be bent for a long time is mainly solved.

Description

Technical Field

[0001] The invention relates to the field of endoscopes, and in particular to a bending drive mechanism of an endoscope. Background Art

[0002] With the rapid development of science and medical technology, the use of endoscopes for minimally invasive or non-invasive medical examinations and treatments has become widely popular. In particular, medical soft endoscopes can enter the body through natural channels of the human body during examination or treatment, causing almost no damage to the patient. Doctors can use the bendable front end of the soft endoscope to conduct a full range of examinations of diseased tissues, eliminating blind spots in observation.

[0003] Existing medical flexible endoscopes generally consist of an insertion part and an operating handle. The insertion part is mainly composed of a main body section, a bending section and a head end seat, wherein the bending section has a snake bone, and a pull line is connected to the snake bone. Pulling and releasing the pull line can control the bending of the bending section. The operating handle includes an endoscope control mechanism, and the operator can control the movement of the pull line through the endoscope control mechanism, thereby realizing the bending of the bending section, which is convenient for doctors to observe the surrounding tissues.

[0004] However, sometimes doctors need to observe diseased tissues for a long time or perform surgery on diseased tissues, which requires them to operate the endoscope control mechanism with their fingers for a long time, which can easily cause doctor's finger fatigue. Summary of the invention

[0005] The main technical problem solved by the present invention is that when the bending section of the endoscope needs to be bent for a long time, it is easy to cause fatigue to the operator.

[0006] In a first aspect, an embodiment provides a bending drive mechanism for an endoscope.

[0007] The bending drive mechanism of the endoscope comprises:

[0008] A winding wheel, the winding wheel is rotatably mounted on the mounting base, a winding wire is connected to the winding wheel, and the winding wheel is used to change the winding amount of the winding wire when rotating;

[0009] And a movable pulley assembly, the movable pulley assembly includes a movable pulley and a pulley mounting seat, the winding wire passes around the movable pulley, and one end of the winding wire away from the winding wheel is fixedly arranged relative to the mounting base; the pulley mounting seat has a pulling connection part, and the pulling connection part is connected to the pulling wire in the endoscope for driving the bending section to bend.

[0010] In one embodiment, it includes a guide seat, which is fixedly connected to the mounting base, and a guide structure is provided on the guide seat. The pulley mounting seat is movably assembled on the guide seat through the guide structure.

[0011] In one embodiment, the pulley mounting seat has a pulley mounting cavity, the movable pulley is arranged in the pulley mounting cavity, the pulley mounting seat has a proximal end surface close to the winding wheel, and at least one threading channel is provided on the proximal end surface. The threading channel is connected to the pulley mounting cavity, and the winding wire passes through the threading channel.

[0012] In one embodiment, the pulley mounting seat has a distal end away from the winding wheel, and the pulling connection portion is arranged at the distal end of the pulley mounting seat.

[0013] In one embodiment, a fixing hole is provided on the pulley mounting seat, and the fixing hole forms an opening on the distal end surface of the pulley mounting seat for the pulling wire to pass through, and the pulling connection portion is formed by the fixing hole.

[0014] In one embodiment, the guide structure includes a first guide portion provided on the guide seat and a second guide portion provided on the pulley mounting seat, and one of the first guide portion and the second guide portion is a guide groove, and the other is a guide protrusion.

[0015] In one embodiment, the pulley mounting cavity has a guide side surface parallel to the guide movement direction of the pulley mounting seat, and the second guide portion includes a distal portion located on the distal side of the guide side surface, and a proximal portion located on the proximal side of the guide side surface.

[0016] In one embodiment, the guide seat is provided with a first mounting groove and a second mounting groove arranged in parallel, the movable pulley assembly includes a first movable pulley assembly and a second movable pulley assembly, the winding wire includes a first winding wire and a second winding wire, the first movable pulley assembly and the second movable pulley assembly are respectively assembled in the first mounting groove and the second mounting groove, and the first winding wire and the second winding wire are respectively wound around the movable pulleys of the first movable pulley assembly and the second movable pulley assembly.

[0017] In one embodiment, the guide seat includes an isolation portion located between the first mounting groove and the second mounting groove, a limiting protrusion is provided at the proximal end of the isolation portion, the limiting protrusion protrudes into the first mounting groove and the second mounting groove, a winding wire fixing portion is provided on the limiting protrusion, and the first winding wire and the second winding wire are fixed on the winding wire fixing portion at one end away from the winding wheel.

[0018] In a second aspect, an endoscope is provided in one embodiment.

[0019] Endoscopes, including:

[0020] An operating handle, the operating handle comprising a housing;

[0021] An insertion portion, the insertion portion comprising a main body section and a bending adjustment section, the proximal end of the main body section is connected to the operating handle, and the proximal end of the bending adjustment section is connected to the distal end of the main body section;

[0022] A pulling rope is connected to the bending adjustment section and is led from the insertion portion to the operating handle. A bending adjustment drive mechanism is provided in the operating handle. The bending adjustment drive mechanism is any of the above-mentioned bending adjustment drive mechanisms. The shell of the operating handle constitutes the mounting base of the bending adjustment drive mechanism.

[0023] Beneficial effects of the present invention:

[0024] According to the bending drive mechanism in the above-mentioned embodiment, the movable pulley assembly includes a movable pulley and a pulley mounting seat, one end of the winding wire is fixedly arranged relative to the mounting base, and the other end can be wound by the winding wheel, and when the winding wheel rotates and winds the winding wire connected thereto, the movable pulley assembly can move under the traction of the winding wire, and then drive the traction wire connected to the bending adjustment section through the traction connection part to achieve the bending of the endoscope; in this process, since the winding wire and the movable pulley assembly are provided, the driving force required for the traction wire to achieve the bending will be shared by the two ends of the winding wire, thereby reducing the operating force required to rotate the winding wheel, thereby allowing the operator to perform the bending operation on the endoscope more easily, which is beneficial to avoiding operator fatigue.

[0025] In addition, when achieving the same bending angle, the provision of the movable pulley assembly will increase the rotation angle of the winding wheel, which is beneficial to improving the bending accuracy of the endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of an embodiment of an endoscope in the present invention;

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of the bending drive mechanism inside the endoscope;

[0028] Figure 3 It is a schematic diagram of the connection relationship between the movable pulley assembly and the winding wheel;

[0029] Figure 4 yes Figure 2 AA section view;

[0030] Figure 5 is a three-dimensional diagram of a movable pulley assembly;

[0031] Figure 6 It is a three-dimensional diagram of a movable pulley.

[0032] List of feature names corresponding to the reference numerals in the figure:

[0033] 100, operating handle; 101, housing; 102, positioning member;

[0034] 110, winding wheel; 111, clamping slot; 112, wire slot; 113, traction head;

[0035] 120, winding wire; 1201, first winding wire; 1202, second winding wire;

[0036] 130, movable pulley assembly; 1301, first movable pulley assembly; 1302, second movable pulley assembly; 131, movable pulley; 1311, center hole; 132, pulley mounting seat; 1321, first mounting seat; 1322, second mounting seat; 1323, proximal side wall; 1324, distal side wall; 1325, threading channel; 1326, fixing hole; 1327, second guide portion; 1328, guide side surface; 1329, lateral opening; 133, rotating shaft;

[0037] 140. Operating parts;

[0038] 150, guide seat; 151, mounting groove; 1511, first mounting groove; 1512, second mounting groove; 152, first guide portion; 154, limiting convex portion; 155, fixing screw;

[0039] 200, insertion part;

[0040] 210, pipe body; 211, main body section; 212, bending section;

[0041] 220, head end seat;

[0042] 300, pull line; 310, first pull line; 320, second pull line. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0044] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0045] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0046] In an embodiment of the present invention, a bending drive mechanism of the endoscope is provided with a movable pulley assembly 130 and a winding wire 120. The winding wire 120 is used to bypass the movable pulley 131 and drive the movable pulley assembly 130 to move, and the pulling wire 300 used to control the bending of the bending adjustment part is connected to the pulley mounting seat 132 of the movable pulley assembly 130. When controlling the bending of the bending adjustment part, the movable pulley assembly 130 and the winding wire 120 can reduce the force required to drive the winding wheel 110 to rotate. For example, without considering the friction factor, the pulling force required for the winding wire 120 can be reduced by half, thereby achieving the effect of saving the operator's effort and avoiding the operator from operating fatigue.

[0047] Embodiments of the endoscope of the present invention:

[0048] Please refer to Figure 1 In one embodiment, the endoscope includes an operating handle 100 and an insertion portion 200 connected to the operating handle 100, the insertion portion 200 includes a tube body 210 for connecting to the operating handle 100 of the endoscope, and a head end seat 220 connected to the distal end of the tube body 210, and the tube body 210 may include a main body section 211 and a bending adjustment section 212, the proximal end of the main body section 211 is connected to the operating handle 100, and the proximal end of the bending adjustment section 212 is connected to the distal end of the main body section 211.

[0049] Those skilled in the art should be aware that the "proximal end" and "distal end" appearing in this document are conventional terms in the medical field. For an instrument to be operated, the proximal end is the end close to the instrument operator, and the distal end is the end away from the instrument operator, usually the end that first enters the patient's body; the proximal end and the distal end can refer to the directions shown in the figure.

[0050] For the endoscope, those skilled in the art can understand that the main section 211 of the tube body 210 can bear and drive the bending section 212 and the head end seat 220, and the bending section 212 of the tube body 210 can bend under the control of the pull wire 300, thereby adjusting the orientation of the head end seat 220 to meet the corresponding use requirements. In some embodiments, the bending section 212 can adopt a snake bone structure commonly used in the art, and the snake bone segments in the bending section 212 can produce relative deflection, and the corresponding pull wire 300 can be inserted into the side wall of the snake bone segment, and the pull wire 300 extends in a direction parallel to the axis of the bending section 212. The distal end of the pull wire 300 is fixed to the farthest snake bone segment, and the pull wire 300 on one side is pulled, and the bending section 212 can bend toward that side.

[0051] In addition, those skilled in the art can understand that, depending on the different bending requirements, the bending section 212 can have different bending forms. For example, a Cartesian rectangular coordinate system is established with the axis of the main section 211 as the Z axis to form mutually perpendicular X, Y, and Z axes. The bending section 212 can be two-way bending, that is, it can bend in both the positive and negative directions of the X axis, or it can bend in both the positive and negative directions of the Y axis; the bending section 212 can also be four-way bending, that is, it can bend in both the positive and negative directions of the X axis and in both the positive and negative directions of the Y axis. Correspondingly, the bending section 212 can be connected to two pull lines 300 (for example Figure 2 The four puller wires 300 include a first puller wire 310 and a second puller wire 320 as shown.

[0052] The head end seat 220 of the insertion part 200 can be provided with corresponding functional components as needed. In some embodiments, an imaging element and a lighting element can be provided on the head end seat 220, the imaging element is used to take pictures of objects located outside the head end seat 220, and the lighting element can illuminate the objects outside the head end seat 220 so that the imaging element can image. Of course, a through hole can also be provided on the head end seat 220, and the through hole is the distal opening of the working channel in the insertion part 200.

[0053] The operating handle 100 can be held by the operator to operate the endoscope, such as adjusting the depth of the insertion tube entering the patient's body, achieving the bending of the bending section 212, adjusting image parameters, etc., and different ports can be set to allow cables, pipes, etc. in the insertion tube to be led out to the outside.

[0054] Hereinafter, the bending adjustment driving mechanism in the operating handle 100 for realizing the bending adjustment of the bending adjustment section 212 will be introduced in detail.

[0055] In the embodiments of the present invention, please refer to Figure 2The bending drive mechanism includes a winding wheel 110, a winding wire 120 and a movable pulley assembly 130. The housing 101 of the operating handle 100 can be used as a mounting base of the bending drive mechanism for mounting corresponding components in the bending drive mechanism.

[0056] The winding wheel 110 is rotatably mounted on the mounting base, and the winding wire 120 is connected to the winding wheel 110. The winding wheel 110 is used to change the winding amount of the winding wire 120 when rotating. The operating handle 100 also includes an operating member 140 such as a lever or a knob for driving the winding wheel 110 to rotate. These operating members 140 can be rotated from the outside of the operating handle 100, thereby driving the winding wheel 110 to rotate. Of course, the operating member 140 is connected to the winding wheel 110 through a corresponding transmission structure to transmit the driving force of the operator to the winding wheel 110.

[0057] The rotating assembly structure of the winding wheel 110 is not limited. For example, an assembly hole can be provided on the housing 101 of the operating handle 100, and a rotating shaft can be provided on the winding wheel 110, and the winding wheel 110 can be rotatably installed in the assembly hole through the rotating shaft. For another example, a rotating matching portion for matching with the assembly hole can be provided on the operating member 140, and the winding wheel 110 can be fixed to the rotating matching portion to rotate together with the operating member 140 such as a lever or a knob.

[0058] The outer circumference of the winding wheel 110 is provided with a groove, and the winding wire 120 can be embedded in the groove, which is helpful to prevent the winding wire 120 from being separated from the winding wheel 110 and improve the working reliability of the bending drive mechanism. The winding wire 120 and the winding wheel 110 can be connected in any way that can realize the winding of the winding wire 120 by the winding wheel 110, for example, please refer to Figure 3 , a clamping groove 111 and a wire groove 112 are provided on the end surface of the winding wheel 110. The wire groove 112 is connected between the groove on the outer peripheral surface of the winding wheel 110 and the clamping groove 111 on the end surface, and can allow the winding wire 120 to pass through. The width of the wire groove 112 is smaller than the width of the clamping groove 111; at the same time, one end of the winding wire 120 used for connecting with the winding wheel 110 can be fixedly connected to the traction head 113. After the traction head 113 is embedded in the clamping groove 111, it can abut on the step surface formed between the wire groove 112 and the clamping groove 111, thereby transmitting the pulling force. The fixed connection method between the traction head 113 and the winding wire 120 is not limited, for example, crimping, bonding, welding, etc. can be used. In some other embodiments, the winding wire 120 can also be connected to the winding wheel 110 by other methods in the art, for example, a wire pressing screw is set on the winding wheel 110, and the winding wire 120 is directly crimped to the winding wheel 110 by the wire pressing screw.

[0059] Those skilled in the art will appreciate that the specific structure and material of the winding wire 120 and the pulling wire 300 may refer to the existing winding wires and pulling wires in the related art, for example, single-strand wire or multi-strand wire may be used, which will not be described in detail here.

[0060] The movable pulley assembly 130 includes a movable pulley 131 and a pulley mounting seat 132. The winding wire 120 passes around the movable pulley 131. The end of the winding wire 120 away from the winding wheel 110 is fixed relative to the mounting base. In some embodiments, the outer contour of the pulley mounting seat 132 can be block-shaped. The pulley mounting seat 132 has a pulley mounting cavity. The movable pulley 131 is arranged in the pulley mounting cavity. The rotating assembly method of the movable pulley 131 is not limited. In a specific embodiment, please refer to Figure 5 and Figure 6 A center hole 1311 may be provided at the center of the movable pulley 131, a shaft mounting hole may be provided on the pulley mounting seat 132, and the rotating shaft 133 may pass through the shaft mounting hole and the center hole 1311 to realize the rotational assembly of the pulley. In some embodiments, a groove is provided on the outer circumference of the pulley similar to the groove on the outer circumference of the winding wheel 110, and the winding wire 120 passing around the pulley may be embedded in the groove, which is helpful to prevent the winding wire 120 from detaching from the pulley.

[0061] Please refer to Figure 2 , Figure 3 and Figure 5 In one embodiment, the pulley mounting seat 132 has a proximal side wall 1323 close to the winding wheel 110 and a distal side wall 1324 away from the winding wheel 110, which is conducive to ensuring the structural stability of the pulley mounting seat 132. The outer side surface of the proximal side wall 1323 forms a proximal end surface, and at least one threading channel 1325 is provided on the proximal end surface. The threading channel 1325 is connected to the pulley mounting cavity, and the winding wire 120 passes through the threading channel 1325. In the case where there are two winding wires 120, a threading channel 1325 can be provided for each winding wire 120; a threading channel in the form of a long hole can also be provided, so that more than two winding wires can pass through at the same time.

[0062] Please refer to Figure 2 In some embodiments, a positioning member 102 may be provided on the inner wall of the shell 101 of the operating handle 100. The positioning member 102 may be provided between the winding wheel 110 and the movable pulley 131. The positioning member 102 may adjust the routing path of the winding wire 120 to prevent the winding wire 120 from contacting undesired parts of surrounding objects.

[0063] In some other embodiments, the pulley mounting seat 132 can also be replaced with other structural forms, for example, it can be composed of a seat body and two support arms protruding from the seat body, the two support arms are fixed on the seat body, and a pulley installation space for pulley installation is formed between the two support arms.

[0064] The pulley mounting seat 132 also has a pulling connection portion, and the pulling connection portion is connected to the pulling wire 300 used to drive the bending section 212 to bend in the endoscope. In some embodiments, the pulling connection portion can be disposed at the distal end of the pulley mounting seat 132. For example, please refer to Figure 4 and Figure 5 The distal end of the pulley mounting seat 132 is provided with a fixing hole 1326, and the fixing hole 1326 forms an opening for the pull line 300 to pass through on the distal end surface of the pulley mounting seat 132, and the pull connection portion is formed by the fixing hole 1326. The connection method of the pull line 300 and the pulley mounting seat 132 is not limited, for example, bonding, interference fit, welding, crimping, etc.

[0065] In some embodiments, the bending drive mechanism includes a guide seat 150, and the guide seat 150 is used to guide the movement of the pulley mounting seat. A guide structure is provided on the guide seat 150, and the pulley mounting seat 132 is movably assembled on the guide seat 150 through the guide structure. The provision of the guide seat 150 can ensure the stable movement of the pulley mounting seat 132, and can avoid affecting the bending accuracy of the bending section 212 after adding the pulley mounting seat 132. In some other embodiments, the guide seat 150 can also be omitted, in which case the winding rope and the pulling rope can form a certain tension to avoid the pulley mounting seat 132 from moving significantly and affecting the operation of the movable pulley assembly 130.

[0066] The guide seat 150 can be manufactured separately and fixedly connected to the housing 101 of the operating handle 100 (e.g., by using Figure 2 The guide seat 150 can be fixed by the fixing screw 155 shown in the figure), and can also be integrally formed with the housing 101 of the operating handle 100. By providing the guide seat 150 to install the movable pulley assembly, the structure can be improved on the basis of the existing operating handle 100, which is conducive to reducing the design cost.

[0067] The guide seat 150 may be provided with a mounting groove 151, and the pulley mounting seat 132 may be provided in the mounting groove 151. For the bidirectional bending adjustment section 212, since two pulling wires 300 are required, two pulley mounting seats 132 are required. Figure 4The guide seat 150 includes a first mounting groove 1511 and a second mounting groove 1512 arranged in parallel, the movable pulley assembly includes a first movable pulley assembly 1301 and a second movable pulley assembly 1302, the pulley mounting seat 132 includes a first mounting seat 1321 and a second mounting seat 1322, the winding wire 120 includes a first winding wire 1201 and a second winding wire 1202, the first movable pulley assembly 1301 and the second movable pulley assembly 1302 are respectively mounted in the first mounting groove 1511 and the second mounting groove 1512, and the first winding wire 1201 and the second winding wire 1202 are respectively passed around the movable pulleys 131 of the first movable pulley assembly 1301 and the second movable pulley assembly 1302. In some embodiments, the first winding wire 1201 and the second winding wire 1202 can be symmetrically arranged on opposite sides of the winding wheel 110. It should be noted that, in some other embodiments, the first winding wire 1201 and the second winding wire 1202 may also be arranged asymmetrically, for example, when the two-way bending angles are different. Of course, in some other embodiments, for the four-way bending section 212, four pulling wires 300 and four pulley mounting seats may be provided, and two sets of guide seats may be provided.

[0068] In a specific embodiment, please refer to Figure 4 The guide structure includes a first guide portion 152 arranged on the guide seat 150 and a second guide portion 1327 arranged on the pulley mounting seat 132. The first guide portion 152 is a guide groove, and the second guide portion 1327 is a guide protrusion, which can realize the guided movement of the movable pulley assembly 130 and prevent the movable pulley assembly 130 from falling off the guide seat 150.

[0069] In some embodiments, the second guide portion 1327 can be disposed on two opposite sides of the pulley mounting seat 132, which is conducive to ensuring the smooth movement of the pulley mounting seat 132; the guide protrusion can separate the bottom surface of the pulley mounting seat 132 from the bottom surface of the mounting groove 151, thereby reducing friction. In addition, by using the matching method of the guide groove and the guide protrusion, only the guide groove and the guide protrusion can be manufactured with high precision, which is conducive to reducing the processing cost.

[0070] The guide protrusions may be arranged continuously along the guide movement direction of the pulley mounting seat 132, or may be distributed discontinuously along the guide movement direction of the pulley mounting seat 132. Figure 5In a specific embodiment, the pulley mounting cavity has a guide side surface 1328 parallel to the guide movement direction of the pulley mounting seat 132, and a lateral opening 1329 is provided on the guide side surface 1328. The lateral opening 1329 is located on the radial outer side of the movable pulley 131. The second guide portion 1327 includes a distal portion located on the distal side of the lateral opening 1329, and a proximal portion located on the proximal side of the lateral opening 1329. The distal portion and the proximal portion form an intermittent distribution, which is conducive to ensuring the stable movement of the pulley mounting seat 132.

[0071] In some other embodiments, the first guide portion 152 can be replaced by a guide protrusion, and the second guide portion 1327 can be replaced by a guide groove. In addition, the guide structure between the pulley mounting seat 132 and the guide seat 150 can also be replaced by other forms, such as setting a dovetail groove on one side of the pulley mounting seat 132 and setting a dovetail type slide groove on the guide seat 150; for another example, the first guide portion 152 can also be a guide hole, and the pulley mounting seat 132 can be embedded in the guide hole, and the guide protrusion and the guide groove can also be omitted, and the guidance can be achieved directly by relying on the outer side of the pulley mounting seat 132.

[0072] In order to facilitate fixing the end of the winding wire 120 away from the winding wheel, a winding wire fixing portion can be provided on the guide seat 150. Figure 4 The guide seat 150 includes an isolation portion between the first mounting groove 1511 and the second mounting groove 1512, and a limiting protrusion 154 is provided at the proximal end of the isolation portion. The limiting protrusion 154 protrudes into the first mounting groove 1511 and the second mounting groove 1512, and a winding wire fixing portion is provided on the limiting protrusion 154, and one end of the first winding wire 1201 and the second winding wire 1202 away from the winding wheel 110 is fixed on the winding wire fixing portion. The setting of the limiting protrusion 154 can not only facilitate the fixing of the end of the winding wire 120, but also limit the moving stroke of the movable pulley assembly 130, so as to control the bending angle of the bending section 212 and avoid excessive bending.

[0073] The winding wire fixing portion may be any structure capable of fixing the end of the winding wire 120, for example, it may be the same fixing hole as that on the pulley mounting seat 132. After the end of the winding wire 120 is inserted into the fixing hole, it is fixed by, for example, bonding, interference fit, welding, crimping, etc. In some other embodiments, the end of the winding wire 120 away from the winding wheel may also be fixed to the housing 101.

[0074] When operating the endoscope for bending, the operator rotates the operating member 140 on the outside of the operating handle 100 to drive the winding wheel 110 to rotate. The winding wheel 110 can change the winding amount of the winding wire 120 wound thereon, and the movable pulley principle is used to drive the pulley mounting seat 132 to move, thereby driving the pulling wire 300 connected to the pulley mounting seat 132 to produce displacement, thereby realizing the bending control of the bending section 212 of the insertion part 200. Due to the use of the movable pulley principle, the bending operation force of the endoscope in the present invention is reduced, which is conducive to avoiding the fatigue of the doctor's operating fingers; in addition, the movable pulley structure can increase the rotation angle of the winding wheel and the operating member 140, making the operator's bending operation more refined and convenient for controlling the bending amount.

[0075] Embodiments of the bending drive mechanism of the endoscope in the present invention:

[0076] The structure of the bending drive mechanism of the endoscope may be the same as the bending drive mechanism structure in any of the above-mentioned embodiments of the endoscope, including a winding wheel 110, a movable pulley assembly 130 and a winding wire 120, and the specific structure will not be repeated here.

[0077] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. The bending drive mechanism of the endoscope is characterized in that: include: A winding wheel, the winding wheel is rotatably mounted on the mounting base, a winding wire is connected to the winding wheel, and the winding wheel is used to change the winding amount of the winding wire when rotating; And a movable pulley assembly, the movable pulley assembly includes a movable pulley and a pulley mounting seat, the winding wire passes around the movable pulley, and one end of the winding wire away from the winding wheel is fixedly arranged relative to the mounting base; the pulley mounting seat has a pulling connection part, and the pulling connection part is connected to the pulling wire in the endoscope for driving the bending section to bend.

2. The bending drive mechanism according to claim 1, characterized in that: It comprises a guide seat, the guide seat is fixedly connected to the mounting base, a guide structure is arranged on the guide seat, and the pulley mounting seat is movably assembled on the guide seat through the guide structure.

3. The bending drive mechanism according to claim 2, characterized in that: The pulley mounting seat has a pulley mounting cavity, the movable pulley is arranged in the pulley mounting cavity, the pulley mounting seat has a proximal end face close to the winding wheel, and at least one threading channel is arranged on the proximal end face. The threading channel is connected to the pulley mounting cavity, and the winding wire passes through the threading channel.

4. The bending drive mechanism according to claim 3, characterized in that: The pulley mounting seat has a distal end away from the winding wheel, and the pulling connection portion is arranged at the distal end of the pulley mounting seat.

5. The bending drive mechanism according to claim 4, characterized in that: The pulley mounting seat is provided with a fixing hole, and the fixing hole forms an opening for the pulling wire to pass through on the distal end surface of the pulley mounting seat, and the pulling connection part is formed by the fixing hole.

6. The bending drive mechanism according to claim 3, characterized in that: The guide structure comprises a first guide portion arranged on the guide seat and a second guide portion arranged on the pulley mounting seat, one of the first guide portion and the second guide portion is a guide groove, and the other is a guide protrusion.

7. The bending drive mechanism according to claim 6, characterized in that: The pulley mounting cavity has a guide side surface parallel to the guide movement direction of the pulley mounting seat, and the second guide portion includes a distal portion located at the distal side of the guide side surface and a proximal portion located at the proximal side of the guide side surface.

8. The bending drive mechanism according to any one of claims 2 to 7, characterized in that: The guide seat is provided with a first mounting groove and a second mounting groove arranged in parallel, the movable pulley assembly includes a first movable pulley assembly and a second movable pulley assembly, the winding wire includes a first winding wire and a second winding wire, the first movable pulley assembly and the second movable pulley assembly are respectively assembled in the first mounting groove and the second mounting groove, and the first winding wire and the second winding wire are respectively wound around the movable pulleys of the first movable pulley assembly and the second movable pulley assembly.

9. The bending drive mechanism according to claim 8, characterized in that: The guide seat includes an isolation part located between the first mounting groove and the second mounting groove, a limiting protrusion is provided at the proximal end of the isolation part, the limiting protrusion protrudes into the first mounting groove and the second mounting groove, a winding wire fixing part is provided on the limiting protrusion, and the first winding wire and the second winding wire are fixed on the winding wire fixing part at one end away from the winding wheel.

10. An endoscope, characterized in that include: An operating handle, the operating handle comprising a housing; An insertion portion, the insertion portion comprising a main body section and a bending adjustment section, the proximal end of the main body section is connected to the operating handle, and the proximal end of the bending adjustment section is connected to the distal end of the main body section; A pulling rope is connected to the bending adjustment section and is led from the insertion part to the operating handle. A bending adjustment drive mechanism is provided in the operating handle. The bending adjustment drive mechanism is the bending adjustment drive mechanism described in any one of claims 1 to 9. The shell of the operating handle constitutes the mounting base of the bending adjustment drive mechanism.

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