Steering locking device and endoscope

Abstract

The embodiments of the present invention provide a steering locking device and an endoscope, which relate to the field of medical device technology. The steering locking device provided by the embodiments of the present invention includes a housing, a steering member and a locking member. The steering member is rotatably connected to the housing, and the steering member is used to manipulate the steering of the imaging catheter of the endoscope. Specifically, the distal end of the imaging catheter is driven to steer by manipulating the steering member to rotate relative to the housing. The locking member is connected to the housing, and the locking member can be relatively close to or away from the rotation axis of the steering member to cooperate with or disengage from the steering member. When the locking member cooperates with the steering member, the steering member is fixed relative to the housing; when the locking member disengages from the steering member, the steering member can rotate relative to the housing. The steering member is locked by the movement of the locking member in the radial direction of the steering member, so that the locking of the steering member is more stable and reliable, which can effectively improve the impact caused by the failure of the locking during diagnosis and treatment, and realize the precise rotation angle control of the imaging catheter.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a steering locking device and an endoscope. Background Art

[0002] An endoscope is a detection instrument with direct vision capabilities. It enters the human body through natural orifices or small surgical incisions, allowing surgical procedures to be performed under the direct vision of the endoscope. The use of endoscopes has gradually been recognized by the market. For example, when used in the biliary subsystem, the built-in camera can be used to observe lesions and stones in the bile duct. Compared with traditional ERCP surgery (endoscopic retrograde cholangiography), it greatly improves the accuracy of biliary disease treatment without increasing the incidence of complications, further confirming its safety.

[0003] When using a choledochoscope system clinically, the rotation direction of the distal end of the imaging catheter needs to be controlled, and the distal end of the imaging catheter needs to be locked in the current position after adjustment. However, existing choledochoscopes use a coaxial movement method, which pushes the rotating part along the rotation axis to lock the rotating part. The locking effect is poor and precise rotation angle control of the imaging catheter cannot be achieved. Summary of the Invention

[0004] The objectives of the present invention include, for example, providing a steering locking device that can improve the technical problems in the prior art of poor locking effect and inability to achieve precise steering angle control of an imaging catheter.

[0005] Another object of the present invention is to provide an endoscope that can improve the technical problems in the prior art of poor locking effect and inability to achieve precise steering angle control of the imaging catheter.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides a steering locking device for an endoscope, comprising a housing, a steering member, and a locking member. The steering member is used to steer an imaging catheter of the endoscope. The steering member is rotatably connected to the housing, and the locking member is connected to the housing. The locking member can be relatively moved closer to or farther from the rotation axis of the steering member to engage or disengage with the steering member.

[0008] The locking member is used to cooperate with the steering member to put the steering member in a locked state, and the steering member is fixed relative to the housing, or to be disengaged from the steering member to put the steering member in an unlocked state, and the steering member is rotatable relative to the housing.

[0009] Optionally, a first clamping portion is provided on the steering member, and a second clamping portion is provided on the locking member; the second clamping portion is used to engage with the first clamping portion to put the steering member in the locked state, or to disengage from the first clamping portion to put the steering member in the unlocked state.

[0010] Optionally, the first engaging portion includes a plurality of tooth grooves arranged on the outer periphery of the steering member, and the second engaging portion is a latching tooth arranged on the locking member. When the tooth grooves are engaged with the latching tooth, the steering member is in the locked state.

[0011] Optionally, there are multiple latching teeth, and all of the latching teeth are used to engage with the tooth grooves.

[0012] Optionally, the number of the latching teeth is three; two adjacent latching teeth are arranged at an angle, and the intersection of the center lines of the two adjacent latching teeth is located in the extension direction from the tooth root to the tooth top of the latching teeth.

[0013] Optionally, the angle between two adjacent latch teeth is A, the angle between two adjacent tooth grooves is B, and A=B.

[0014] Optionally, the steering member has a first contact surface, and the locking member has a second contact surface, and the second contact surface is used to frictionally contact the first contact surface to put the steering member in the locked state, or to disengage from the first contact surface to put the steering member in the unlocked state.

[0015] Optionally, the steering locking device further comprises a pressing member provided on the housing, wherein the pressing member is used to apply a force directed toward the steering member to the locking member so that the locking member cooperates with the steering member.

[0016] Optionally, the pressing member is rotatably connected to the housing along a preset axis, and the pressing member has a first contact surface and a second contact surface arranged around the preset axis, and a distance between the first contact surface and the preset axis is greater than a distance between the second contact surface and the preset axis;

[0017] The first contact surface is used to contact the locking member so that the locking member cooperates with the steering member; the second contact surface is used to contact the locking member so that the locking member is disengaged from the steering member.

[0018] Optionally, the pressing member includes a pressing block and a handle, the pressing block is rotatably connected to the shell, and the first resistance surface and the second resistance surface are both arranged on the pressing block; one end of the handle is fixedly connected to the pressing block, and the other end of the handle extends out of the shell to drive the pressing block to rotate by applying external force to the handle.

[0019] Optionally, the first contact surface and the second contact surface are smoothly transitioned through an arc surface.

[0020] Optionally, the locking member further includes an elastic arm, one end of which is used to cooperate with the steering member, and the other end of the elastic arm is connected to the housing; the elastic arm is used to make the locking member tend to disengage from the steering member.

[0021] Optionally, the elastic arm is rotatably connected to the shell; a limiting protrusion is provided on the shell and is located on the rotation trajectory of the elastic arm, and the limiting protrusion is used to interfere with the elastic arm to cause the elastic arm to deform when the locking member cooperates with the steering member.

[0022] Optionally, the locking member is rotatably connected to the housing; the steering locking device further comprises an elastic member, both ends of which are respectively connected to the housing and the locking member, so that the locking member has a tendency to disengage from the steering member.

[0023] Optionally, the steering member includes a first steering member and a second steering member, the first steering member and the second steering member are coaxially arranged, and the locking member is used to cooperate with the first steering member and the second steering member at the same time so that the first steering member and the second steering member are both in a locked state.

[0024] Optionally, the steering locking device further comprises a thrust member; along the axial direction of the steering member, the thrust member is located between the first steering member and the second steering member to isolate the first steering member and the second steering member.

[0025] Optionally, a bayonet is provided on the outer periphery of the thrust member, a limiting rod is fixed on the housing, and the limiting rod is clamped in the bayonet to limit the thrust member from rotating relative to the housing.

[0026] An embodiment of the present invention further provides an endoscope. The endoscope includes a steering lock device comprising a housing, a steering member, and a locking member. The steering member is used to steer an imaging catheter of the endoscope. The steering member is rotatably connected to the housing. The locking member is connected to the housing and can be relatively moved closer to or farther from the rotation axis of the steering member to engage or disengage with the steering member. The locking member is configured to engage with the steering member to lock the steering member, fixing the steering member relative to the housing, or to disengage from the steering member to unlock the steering member, rotatable relative to the housing.

[0027] The beneficial effects of the steering locking device and endoscope according to the embodiments of the present invention include, for example:

[0028] An embodiment of the present invention provides a steering locking device for an endoscope. The steering locking device includes a housing, a steering member, and a locking member. The steering member is rotatably connected to the housing, and the steering member is used to manipulate the steering of the imaging catheter of the endoscope. Specifically, by manipulating the steering member to rotate relative to the housing, the distal end of the imaging catheter is driven to steer. The locking member is connected to the housing, and the locking member can be relatively close to or away from the rotation axis of the steering member to cooperate with or disengage from the steering member. When the locking member cooperates with the steering member, the rotating member is in a locked state, and the steering member is fixed relative to the housing; when the locking member disengages from the steering member, the steering member is in an unlocked state, and the steering member can rotate relative to the housing. The steering member is locked by the movement of the locking member in the radial direction of the steering member, so that the locking of the steering member is more stable and reliable, which can effectively improve the impact of locking failure during diagnosis and treatment, achieve precise rotation angle control of the imaging catheter, and thus help improve the efficiency of diagnosis and treatment.

[0029] An embodiment of the present invention further provides an endoscope comprising the above-mentioned steering locking device. Since the endoscope comprises the above-mentioned steering locking device, it also has all the beneficial effects of the steering locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of the overall structure of a steering locking device provided by an embodiment of the present invention;

[0032] Figure 2 A schematic cross-sectional view of a steering locking device provided by an embodiment of the present invention at a first viewing angle;

[0033] Figure 3 A schematic diagram of the internal structure of a steering locking device provided by an embodiment of the present invention from a second viewing angle;

[0034] Figure 4 A schematic structural diagram of a steering member in a steering locking device provided by an embodiment of the present invention;

[0035] Figure 5 A schematic structural diagram of a locking member in a steering locking device provided by an embodiment of the present invention;

[0036] Figure 6A schematic structural diagram of a steering member in an unlocked position in a steering locking device provided by an embodiment of the present invention;

[0037] Figure 7 A schematic structural diagram of another steering locking device provided in an embodiment of the present invention.

[0038] Icons: 100 - Steering lock device; 110 - Housing; 111 - First housing; 112 - Second housing; 113 - Limit rod; 114 - Accommodation chamber; 115 - Opening; 116 - First rotating shaft; 117 - Second rotating shaft; 118 - Limit protrusion; 119 - Wire guard; 120 - Steering member; 121 - First steering member; 122 - Second steering member; 123 - Steering wheel; 1231 - First steering wheel; 1232 - Second steering wheel; 124 - Gear unit; 1241 - First gear unit; 1242 - Second gear unit; 125 - First clamping unit ;126-arc groove;127-first connecting shaft;128-second connecting shaft;129-first contact surface;130-thrust member;131-bayonet;140-locking member;141-elastic arm;142-first end;143-second end;144-second clamping portion;145-first clamping tooth;146-second clamping tooth;147-third clamping tooth;148-second contact surface;150-pressing member;151-pressing block;152-first resistance surface;153-second resistance surface;154-handle;161-first hand wheel;162-second hand wheel. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0045] Figure 1 This is a schematic diagram of the overall structure of the steering locking device 100 provided in this embodiment. Figure 2 This is a schematic cross-sectional view of the steering locking device 100 provided in this embodiment at a first viewing angle. Figure 3 This is a schematic diagram of the internal structure of the steering locking device 100 provided in this embodiment at a second viewing angle. Figure 1 、 Figure 2 and Figure 3 This embodiment provides a steering locking device 100, and accordingly, provides an endoscope (not shown).

[0046] The endoscope includes a steering locking device 100 and an imaging catheter (not shown). The proximal end of the imaging catheter is connected to the housing 110 of the steering locking device 100, and a control line (not shown) in the imaging catheter is connected to the steering member 120 of the steering locking device 100. When the steering member 120 rotates relative to the housing 110, the control line is pulled to steer the distal end of the imaging catheter.

[0047] The steering lock device 100 includes a housing 110, a steering member 120, and a locking member 140. The steering member 120 is rotatably connected to the housing 110 and is used to steer the imaging catheter of the endoscope. Specifically, by manipulating the steering member 120 to rotate relative to the housing 110, the distal end of the imaging catheter is steered. The locking member 140 is connected to the housing 110 and can be moved relatively close to or away from the rotation axis of the steering member 120 to engage or disengage with the steering member 120. When the locking member 140 engages with the steering member 120, the steering member 120 is in a locked state, in which the steering member 120 is fixed relative to the housing 110. When the locking member 140 disengages from the steering member 120, the steering member 120 is in an unlocked state, in which the steering member 120 can rotate relative to the housing 110. The locking of the steering member 120 is achieved by the radial movement of the locking member 140 on the steering member 120, making the locking of the steering member 120 more stable and reliable, which can effectively improve the impact of locking failure during diagnosis and treatment, and realize precise rotation angle control of the imaging catheter, thereby helping to improve the efficiency of diagnosis and treatment.

[0048] The steering locking device 100 provided in this embodiment is further described below:

[0049] Please continue to refer to Figure 1-Figure 3 In this embodiment, the housing 110 includes a first housing 111 and a second housing 112 that are buckled together. Figure 2 ), the first shell 111 and the second shell 112 are fastened together to form a receiving chamber 114, wherein the steering member 120 and the locking member 140 are both disposed within the receiving chamber 114. An opening 115 communicating with the receiving chamber 114 is also disposed at the distal end of the housing 110. The proximal end of the imaging catheter is connected to the distal end of the housing 110, and the control line of the imaging catheter extends into the receiving chamber 114 through the opening 115 to connect with the steering member 120 within the receiving chamber 114. Specifically, the housing 110 further includes a wire sheath 119 mounted at the distal ends of the first shell 111 and the second shell 112, with the opening 115 being disposed within the wire sheath 119.

[0050] It should be noted that in the description of this embodiment, the "proximal end" of a component refers to the end of the component that is relatively close to the outside of the human body when in use. Correspondingly, the "distal end" of a component refers to the end of the component that is relatively close to the inside of the human body when in use. Furthermore, since the steering lock device 100 is located outside the human body during use, the end of the imaging catheter that is close to the steering lock device 100 is the proximal end of the imaging catheter, and the end of the imaging catheter that is relatively far from the steering lock device 100 is the distal end of the imaging catheter.

[0051] Figure 4 This is a structural diagram of the steering member 120 in the steering locking device 100 provided in this embodiment. Figure 1-Figure 4 The steering member 120 is provided with a first clamping portion 125, and the locking member 140 is provided with a second clamping portion 144. The second clamping portion 144 is used to engage with the first clamping portion 125 to put the steering member 120 in a locked state. At this time, the steering member 120 is fixed relative to the housing 110, or the second clamping portion 144 is used to disengage from the first clamping portion 125 to put the steering member 120 in an unlocked state. At this time, the steering member 120 is rotatable relative to the housing 110, that is, when the second clamping portion 144 is engaged with the first clamping portion 125, the steering member 120 is in a locked state, and when the second clamping portion 144 is disengaged from the first clamping portion 125, the steering member 120 is in an unlocked state.

[0052] Optionally, the first engaging portion 125 includes a plurality of teeth grooves provided on the outer periphery of the steering member 120, and the second engaging portion 144 is a latching tooth provided on the locking member 140. When the teeth grooves are engaged with the latching teeth, the steering member 120 is in a locked state.

[0053] Specifically, the steering member 120 includes a steering wheel 123 and a gear portion 124 disposed axially to one side of the steering wheel 123. A plurality of gear teeth are evenly distributed along the outer circumference of the gear portion 124, with tooth grooves formed between adjacent gear teeth. In other words, the plurality of tooth grooves are evenly distributed along the circumference of the steering member 120. The tooth grooves are located radially outward from the outer circumference of the steering wheel 123, meaning that the distance between the tooth tips of the gear teeth and the axis of the steering member 120 is greater than the outer diameter of the steering wheel 123. A locking member 140 is disposed radially outward from the gear portion 124, and the latching teeth are movable relative to the housing 110 to engage and disengage the latching teeth with the tooth grooves. Optionally, the steering wheel 123 and the gear portion 124 are integrally formed. It is understood that in other embodiments, other methods may be used to securely connect the steering wheel 123 and the gear portion 124, such as by using fasteners connected to both the steering wheel 123 and the gear portion 124 to securely connect the steering wheel 123 and the gear portion 124.

[0054] It should be noted that, in the present embodiment, the tooth groove is formed between two adjacent gear teeth on the gear portion 124. It is understandable that in other embodiments, the shape and position of the tooth groove can also be set according to requirements, for example, the tooth groove is set to have a trapezoidal cross-section, or a tooth sector portion is provided on one axial side of the steering wheel 123. The tooth groove is the space formed between adjacent teeth of the tooth sector portion, which can meet the steering requirements of the distal end of the imaging catheter.

[0055] Optionally, there are multiple latch teeth, and the multiple latch teeth are all used to engage with the tooth grooves, that is, multiple latch teeth engage with multiple tooth grooves at the same time, so as to further ensure the locking effect and make the locking more stable and reliable. In this embodiment, there are three latch teeth, and the adjacent two latch teeth are arranged at an angle, and the center lines of the adjacent two latch teeth (such as Figure 5The intersection of the center lines of the two adjacent locking teeth (shown by the mid-dotted line) is located in the direction extending from the root to the top of the tooth. In other words, the intersection of the center lines of the two adjacent locking teeth is located on the side of the locking member 140 where the locking teeth are provided, that is, the side of the locking member 140 closer to the steering member 120. It is understood that in other embodiments, the number of locking teeth can be specifically set according to needs, for example, the number of locking teeth can be set to one, two, or four.

[0056] Figure 5 This is a schematic diagram of the structure of the locking member 140 in the steering locking device 100 provided in this embodiment. Figure 5 Specifically, adjacent latching teeth are arranged at an angle, meaning their centerlines are arranged at an angle. The three latching teeth are a first latching tooth 145, a second latching tooth 146, and a third latching tooth 147, which are arranged in that order. When the first engaging portion 125 and the second engaging portion 144 engage, the first latching tooth 145, the second latching tooth 146, and the third latching tooth 147 simultaneously engage with the three adjacent tooth grooves. Simultaneously, an extension of the centerline of the second latching tooth 146 intersects the axis of the gear portion 124. The first latch tooth 145 and the second latch tooth 146, and the third latch tooth 147 and the second latch tooth 146 are respectively arranged at an angle, and the intersection of the center lines of the first latch tooth 145 and the second latch tooth 146 is located on the side of the locking member 140 close to the steering member 120, that is, the tooth top of the first latch tooth 145 is inclined toward the direction close to the second latch tooth 146; the intersection of the center lines of the second latch tooth 146 and the first latch tooth 145 is located on the side of the locking member 140 close to the steering member 120, that is, the tooth top of the third latch tooth 147 is inclined toward the direction close to the second latch tooth 146.

[0057] Since the first latching tooth 145 is arranged obliquely toward the second latching tooth 146, during the process of the first latching tooth 145 engaging with the tooth groove, the first latching tooth 145 applies a force on the gear portion 124 to move toward the second latching tooth 146; at the same time, since the third latching tooth 147 is arranged obliquely toward the second latching tooth 146, during the process of the third latching tooth 147 engaging with the tooth groove, the third latching tooth 147 applies a force on the gear portion 124 to move toward the second latching tooth 146. The first latching tooth 145 and the third latching tooth 147 are respectively located on both sides of the second latching tooth 146. Therefore, the forces applied by the first latching tooth 145 and the second latching tooth 146 to the gear portion 124 are in opposite directions, which not only ensures the engaging effect, but also helps the latching teeth to automatically align with the tooth groove, so that the latching teeth can smoothly engage with the tooth groove, make the latching teeth and the tooth groove completely match, and better lock the steering member 120.

[0058] Optionally, the angle between two adjacent latching teeth is A, the angle between two adjacent tooth grooves is B, and A = B. Specifically, the angle between the first latching tooth 145 and the second latching tooth 146 and the angle between the second latching tooth 146 and the third latching tooth 147 are both A, and the angle between two adjacent tooth grooves is both B, and A = B, so that the engagement between the latching teeth and the tooth grooves is more stable, thereby making the locking of the steering member 120 more stable and reliable.

[0059] Optionally, the outer wall of the steering wheel 123 is provided with an arcuate groove 126 extending circumferentially along the steering wheel 123. Notches are provided at both ends of the arcuate groove 126 along the circumference of the steering wheel 123, extending through the end surface of one axial end of the steering wheel 123. During use, a control wire within the imaging catheter is wound around the notch and the arcuate groove 126, connecting the control wire to the steering wheel 123. As the steering wheel 123 rotates, the control wire can be pulled to steer the distal end of the imaging catheter.

[0060] Please continue to refer to Figure 1-Figure 4 In this embodiment, there are two steering members 120, namely a first steering member 121 and a second steering member 122. The first steering member 121 and the second steering member 122 are coaxially arranged. The first engaging portion 125 of the first steering member 121 and the first engaging portion 125 of the second steering member 122 are configured to simultaneously engage with the second engaging portion 144, thereby locking both the first steering member 121 and the second steering member 122.

[0061] Specifically, the first steering member 121 includes a first steering wheel 1231 and a first gear portion 1241. The first engaging portion 125 of the first steering member 121 serves as the tooth groove of the first gear portion 1241. The second steering member 122 includes a second steering wheel 1232 and a second gear portion 1242. The first engaging portion 125 of the second steering member 122 serves as the tooth groove of the second gear portion 1242. The imaging catheter has two sets of control cables. One set of control cables is connected to the first steering wheel 1231 to rotate the distal end of the imaging catheter in the vertical direction under the drive of the first steering wheel 1231, thereby achieving vertical adjustment of the distal end of the imaging catheter. The other set of control cables is connected to the second steering wheel 1232 to rotate the distal end of the imaging catheter in the left-right direction under the drive of the second steering wheel 1232, thereby achieving left-right adjustment of the distal end of the imaging catheter.

[0062] The first steering member 121 and the second steering member 122 are coaxially arranged, and the latching teeth are located radially outward of the first gear portion 1241 and the second gear portion 1242. When the latching teeth move toward the rotation axis of the first gear portion 1241 and the second gear portion 1242, the latching teeth can simultaneously engage with the first gear portion 1241 and the second gear portion 1242, thereby locking the first steering member 121 and the second steering member 122 at the same time. In other words, the first steering member 121 and the second steering member 122 are locked or unlocked by the same locking member 140. It is understood that in other embodiments, the number of locking members 140 can be set to correspond to the number of steering members 120 as needed, that is, the first steering member 121 and the second steering member 122 are locked by different locking members 140, thereby facilitating independent control of the first steering member 121 and the second steering member 122.

[0063] In this embodiment, the first steering member 121 has a first connecting shaft 127, and the second steering member 122 has a second connecting shaft 128. The first connecting shaft 127 is a tubular shaft, and the second connecting shaft 128 passes through the first connecting shaft 127. The end of the second connecting shaft 128 away from the second steering wheel 1232 extends from the first connecting shaft 127. Both the end of the second connecting shaft 128 away from the second steering wheel 1232 and the end of the first connecting shaft 127 away from the first steering wheel 1231 are located outside the housing 110. The steering locking device 100 also includes a first handwheel 161 and a second handwheel 162. The first handwheel 161 is located outside the housing 110 and is fixedly connected to the first connecting shaft 127. Rotating the first handwheel 161 allows the first steering wheel 1231 to be manipulated, thereby adjusting the distal end of the imaging catheter in the vertical direction. The second hand wheel 162 is located outside the housing 110 and is fixedly connected to the second connecting shaft 128 , so that the second steering wheel 1232 can be manipulated by rotating the second hand wheel 162 , thereby adjusting the distal end of the imaging catheter in the left and right directions.

[0064] Optionally, the steering lock device 100 further includes a thrust member 130. The thrust member 130 is located axially between the first steering member 121 and the second steering member 122 to isolate the first steering member 121 from the second steering member 122. Specifically, the first steering wheel 1231 of the first steering member 121 is closer to the second steering member 122 than the first gear portion 1241. That is, the first steering wheel 1231 is located on the side of the first gear portion 1241 closer to the second steering member 122. The second steering wheel 1232 of the second steering member 122 is closer to the first steering member 121 than the second gear portion 1242. That is, the second steering wheel 1232 is located on the side of the second gear portion 1242 closer to the first steering member 121. The thrust member 130 is located between the first steering wheel 1231 and the second steering wheel 1232 to isolate the first steering wheel 1231 from the second steering wheel 1232, so that when the first steering wheel 1231 is rotated by the first hand wheel 161, the second steering wheel 1232 can be prevented from being affected by the first steering wheel 1231 and rotating. Similarly, when the second steering wheel 1232 is rotated by the second hand wheel 162, the first steering wheel 1231 can be prevented from being affected by the second steering wheel 1232 and rotating.

[0065] Optionally, a retaining ring 131 is provided on the outer periphery of the thrust member 130. A limiting rod 113 is fixed to the housing 110, and the limiting rod 113 is engaged with the retaining ring 131 to limit the rotation of the thrust member 130 relative to the housing 110. Specifically, the thrust member 130 is annular, with a branch extending radially outwardly of the thrust member 130. The retaining ring 131 is formed in this branch and has a U-shape. When the limiting rod 113 is engaged with the retaining ring 131, the rotational movement of the thrust member 130 relative to the housing 110 is locked, thereby preventing the thrust member 130 from rotating during the rotation of the first steering wheel 1231 or the second steering wheel 1232.

[0066] Figure 6 This is a structural diagram of the steering member 120 in the steering locking device 100 provided in this embodiment in the unlocked position. Figure 3 and Figure 6 In this embodiment, the steering lock device 100 further includes a pressing member 150 disposed on the housing 110. The pressing member 150 is configured to apply a force directed toward the steering member 120 to the locking member 140, causing the locking member 140 to rotate toward the rotation axis of the steering member 120, thereby causing the locking member 140 to engage with the steering member 120. Specifically, the pressing member 150 is located radially outward of the locking member 140, i.e., the steering member 120, the locking member 140, and the pressing member 150 are disposed in sequence radially of the steering member 120. The pressing member 150 applies a force directed toward the steering member 120 to the locking member 140, causing the first engaging portion 125 to engage with the second engaging portion 144.

[0067] Optionally, the pressing member 150 is rotatably connected to the housing 110 along a predetermined axis, and the pressing member 150 has a first interfering surface 152 and a second interfering surface 153 disposed about the predetermined axis, wherein the distance between the first interfering surface 152 and the predetermined axis is greater than the distance between the second interfering surface 153 and the predetermined axis. The first interfering surface 152 is configured to interfer with the locking member 140 to enable the locking member 140 to engage with the steering member 120. The second interfering surface 153 is configured to interfer with the locking member 140 to enable the locking member 140 to disengage from the steering member 120.

[0068] Specifically, the pressing member 150 includes a pressing block 151 and a handle 154. The pressing block 151 is rotatably connected to the housing 110, and a first contact surface and a second contact surface are both provided on the pressing block 151. One end of the handle 154 is fixedly connected to the pressing block 151, and the other end of the handle 154 extends out of the housing 110 so as to manipulate the pressing block 151 to rotate by applying an external force to the handle 154. The pressing block 151 is rotatably connected to the housing 110 via a first rotating shaft 116, and the preset axis is the axis of the first rotating shaft 116. The first and second contact surfaces 152 and 153 are provided around the first rotating shaft 116, so that the wall surface where the pressing block 151 contacts the locking member 140 can be switched between the first and second contact surfaces 152 and 153 by rotating the pressing block 151. When the first contact surface 152 contacts the locking member 140 , the first clamping portion 125 is engaged with the second clamping portion 144 ; when the second contact surface 153 contacts the locking member 140 , the second clamping portion 144 is disengaged from the first clamping portion 125 .

[0069] The distance between the first contact surface 152 and the first rotating shaft 116 is greater than the distance between the second contact surface 153 and the first rotating shaft 116. Therefore, when the first contact surface 152 contacts the locking member 140, the distance between the locking member 140 and the first rotating shaft 116 is greater than the distance between the locking member 140 and the first rotating shaft 116 when the second contact surface 153 contacts the locking member 140. Accordingly, when the first contact surface 152 contacts the locking member 140, the distance between the locking member 140 and the steering member 120 is less than the distance between the locking member 140 and the steering member 120 when the second contact surface 153 contacts the locking member 140. Thus, compression and disengagement are achieved through the difference in distances between the first contact surface 152 and the second contact surface 153 relative to the first rotating shaft 116. When the first contact surface 152 contacts the locking member 140 , the latch teeth of the locking member 140 engage with the tooth grooves of the steering member 120 ; when the second contact surface 153 contacts the locking member 140 , the latch teeth of the locking member 140 disengage from the tooth grooves of the steering member 120 .

[0070] Optionally, the first and second contact surfaces 152, 153 are both planar, ensuring sufficient contact area and a good pressing effect when the first and second contact surfaces 152, 153 respectively contact the locking member 140. Optionally, a smooth arc transition is formed between the first and second contact surfaces 152, 153 to facilitate switching of the wall surface that contacts the locking member 140.

[0071] Please refer to Figure 3 、 Figure 5 and Figure 6 In this embodiment, the locking member 140 also includes an elastic arm 141, the second clamping portion 144 is arranged at one end of the elastic arm 141, and the other end of the elastic arm 141 is connected to the shell 110. The elastic arm 141 is used to make the locking member 140 have a tendency to disengage from the steering member 120. Specifically, when the handle 154 is rotated forward so that the wall surface where the pressing member 150 contacts the locking member 140 switches from the second contact surface 153 to the first contact surface 152, the second clamping portion 144 moves toward the direction close to the steering member 120, and the elastic arm 141 is deformed at this time; when the handle 154 is rotated backward so that the wall surface where the pressing member 150 contacts the locking member 140 switches from the first contact surface 152 to the second contact surface 153, the second clamping portion 144 moves toward the direction away from the steering member 120 under the elastic restoring force of the elastic arm 141, thereby causing the second clamping portion 144 to have a tendency to disengage from the first clamping portion 125. At the same time, during this process, the locking member 140 always contacts the pressing block 151.

[0072] Optionally, the elastic arm 141 is rotatably connected to the housing 110. The housing 110 is provided with a limiting protrusion 118 located on the rotational trajectory of the elastic arm 141. The limiting protrusion 118 is configured to abut against the elastic arm 141, thereby deforming the elastic arm 141 when the second engaging portion 144 engages with the first engaging portion 125. Specifically, the elastic arm 141 has a first end 142 and a second end 143 opposite each other. The first end 142 of the elastic arm 141 is rotatably connected to the housing 110 via the second rotating shaft 117. The second engaging portion 144 is disposed on one side of the second end 143, and the pressing block 151 is disposed on the other side of the second end 143. When the pressing block 151 rotates, the second end 143 of the elastic arm 141 approaches or moves away from the steering member 120, so that the second engaging portion 144 engages with or disengages from the first engaging portion 125. At the same time, when the second end 143 of the elastic arm 141 approaches the steering member 120, the limiting protrusion 118 contacts the first end 142 of the elastic arm 141 to limit the rotation of the first end 142, thereby deforming the elastic arm 141. It is understood that in other embodiments, the first end 142 of the elastic arm 141 can also be configured to be fixedly connected to the housing 110, so that when the second end 143 moves toward the steering member 120, the elastic arm 141 deforms.

[0073] It should be noted that, in this embodiment, the locking member 140 is elastic, and the second clamping portion 144 is disengaged from the first clamping portion 125 through the elastic deformation of the elastic arm 141 of the locking member 140. It can be understood that in other embodiments, an additional elastic member may also be provided, and the two ends of the elastic member are respectively connected to the shell 110 and the locking member 140, so that the second clamping portion 144 has a tendency to disengage from the first clamping portion 125 through the elastic force of the elastic member. The elastic member can be set as a torsion spring, a spring clip, etc.

[0074] According to a steering locking device 100 provided in this embodiment, the working principle of the steering locking device 100 is as follows:

[0075] During use, the handle 154 is rotated to unlock the first steering member 121 and the second steering member 122. The first hand wheel 161 and / or the second hand wheel 162 are then rotated as needed to adjust the angular position of the distal end of the imaging catheter. After the adjustment is completed, the handle 154 is rotated forward, and the pressing block 151 rotates driven by the handle 154, thereby pressing the second end 143 of the elastic arm 141 toward the steering member 120 until the latch teeth engage with the first gear portion 1241 and the second gear portion 1242 at the same time. At this time, the first steering member 121 and the second steering member 122 are both in a locked state.

[0076] Figure 7 This is a partial structural diagram of another steering locking device 100 provided in this embodiment. Figure 7 This embodiment also provides another steering locking device 100, which is basically the same as the steering locking device 100 described above, except that the locking member 140 and the steering member 120 cooperate in a different manner.

[0077] Specifically, the steering member 120 has a first contact surface 129, and the locking member 140 has a second contact surface 148. The second contact surface 148 is configured to frictionally contact the first contact surface 129 to lock the steering member 120, or to disengage from the first contact surface 129. Specifically, the steering member 120 has a friction wheel, the outer circumference of which serves as the first contact surface 129. The locking member has a concave surface on the side adjacent to the friction wheel that corresponds to the arc of the first contact surface 129. This concave surface serves as the second contact surface 148. When the first contact surface 152 of the pressing member 150 contacts the locking member 140, the second contact surface 148 is pressed against the first contact surface 129. At this time, the second contact surface 148 is in frictional contact with the first contact surface 129. When the steering member 120 has a tendency to rotate, the friction force between the first contact surface 129 and the second contact surface 148 prevents the steering member 120 from rotating; when the second contact surface 153 contacts the locking member 140, the second contact surface 148 is disengaged from the first contact surface 129, and the steering member 120 is in an unlocked state.

[0078] The steering locking device 100 provided in this embodiment has at least the following advantages:

[0079] The steering locking device 100 provided in an embodiment of the present invention locks the steering member 120 by setting a latching tooth to engage with the tooth groove, and has a good locking effect. At the same time, when the latching tooth engages with the tooth groove, the clamping block 151 presses the locking member 140, further ensuring the locking effect and preventing the latching tooth from falling out of the tooth groove. It can effectively avoid the impact of locking failure and misoperation of the hand wheel during diagnosis and treatment, which helps to facilitate the doctor's operation and improve the efficiency of diagnosis and treatment.

[0080] This embodiment also provides an endoscope, which includes the above-mentioned steering locking device 100, and thus also has the beneficial effects of good locking effect, high stability and reliability, and helps to improve the efficiency of diagnosis and treatment. It should be noted that the endoscope refers to an endoscope capable of achieving distal steering of the imaging catheter, which can be a choledochoscope, duodenoscope, gastroscope, bronchoscope, etc.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A steering locking device for an endoscope, characterized in that: The steering locking device (100) comprises a housing (110), a steering member (120), a thrust member (130), and a locking member (140); the steering member (120) is used to manipulate the steering of the imaging catheter of the endoscope; the steering member (120) is rotatably connected to the housing (110); the locking member (140) is connected to the housing (110), and the locking member (140) can be relatively close to or away from the rotation axis of the steering member (120) to cooperate with or disengage from the steering member (120); The locking member (140) is used to cooperate with the steering member (120) to place the steering member (120) in a locked state, wherein the steering member (120) is fixed relative to the housing (110), or to disengage from the steering member (120) to place the steering member (120) in an unlocked state, wherein the steering member (120) is rotatable relative to the housing (110); The steering member (120) comprises a first steering member (121) and a second steering member (122), the first steering member (121) and the second steering member (122) being coaxially arranged, and the locking member (140) is used to simultaneously cooperate with the first steering member (121) and the second steering member (122) so that the first steering member (121) and the second steering member (122) are both in a locked state; The first steering member (121) includes a first steering wheel (1231) and a first gear portion (1241), and the first clamping portion (125) of the first steering member (121) is a tooth groove of the first gear portion (1241); the second steering member (122) includes a second steering wheel (1232) and a second gear portion (1242), and the first clamping portion (125) of the second steering member (122) is a tooth groove of the second gear portion (1242); the locking member (140) is provided with a second clamping portion (144); the second clamping portion (144) is a latching tooth provided on the locking member (140), and when the tooth groove is engaged with the latching tooth, the steering member (120) is in the locked state; The imaging catheter of the endoscope has two groups of control lines, one group of which is connected to the first steering wheel (1231) so that the distal end of the imaging catheter rotates in the up-down direction under the drive of the first steering wheel (1231), thereby realizing adjustment of the distal end of the imaging catheter in the up-down direction; the other group of control lines is connected to the second steering wheel (1232) so that the distal end of the imaging catheter rotates in the left-right direction under the drive of the second steering wheel (1232), thereby realizing adjustment of the distal end of the imaging catheter in the left-right direction; Along the axial direction of the steering member (120), the thrust member (130) is located between the first steering member (121) and the second steering member (122) to isolate the first steering member (121) from the second steering member (122).

2. The steering lock device according to claim 1, characterized in that: There are multiple latching teeth, and all of the latching teeth are used to engage with the tooth grooves.

3. The steering lock device according to claim 2, characterized in that: The number of the latching teeth is three; two adjacent latching teeth are arranged at an angle, and the intersection of the center lines of the two adjacent latching teeth is located in the extension direction from the tooth root to the tooth top of the latching teeth.

4. The steering lock device according to claim 3, characterized in that: The included angle between two adjacent latch teeth is A, the included angle between two adjacent tooth grooves is B, and A=B.

5. The steering lock device according to claim 1, characterized in that: The steering locking device (100) further comprises a pressing member (150) provided on the housing (110), wherein the pressing member (150) is used to apply a force directed toward the steering member (120) to the locking member (140), so that the locking member (140) cooperates with the steering member (120).

6. The steering lock device according to claim 5, characterized in that: The pressing member (150) is rotatably connected to the housing (110) along a preset axis, and the pressing member (150) has a first contact surface (152) and a second contact surface (153) arranged around the preset axis, and the distance between the first contact surface (152) and the preset axis is greater than the distance between the second contact surface (153) and the preset axis; The first contact surface (152) is used to contact the locking member (140) so that the locking member (140) and the steering member (120) cooperate; the second contact surface (153) is used to contact the locking member (140) so that the locking member (140) and the steering member (120) are disengaged.

7. The steering lock device according to claim 6, characterized in that: The pressing member (150) includes a pressing block (151) and a handle (154), wherein the pressing block (151) is rotatably connected to the housing (110), and the first contact surface (152) and the second contact surface (153) are both provided on the pressing block (151); one end of the handle (154) is fixedly connected to the pressing block (151), and the other end of the handle (154) extends out of the housing (110) so as to drive the pressing block (151) to rotate by applying an external force to the handle (154).

8. The steering lock device according to claim 6, characterized in that: The first contact surface (152) and the second contact surface (153) are smoothly transitioned through an arc surface.

9. The steering lock device according to claim 5, characterized in that: The locking member (140) further comprises an elastic arm (141), one end of the elastic arm (141) being used to cooperate with the steering member (120), and the other end of the elastic arm (141) being connected to the housing (110); the elastic arm (141) is used to cause the locking member (140) to have a tendency to disengage from the steering member (120).

10. The steering lock device according to claim 9, characterized in that: The elastic arm (141) is rotatably connected to the housing (110); a limiting protrusion (118) is provided on the housing (110) and is located on the rotation track of the elastic arm (141); the limiting protrusion (118) is used to abut against the elastic arm (141) so as to cause the elastic arm (141) to deform when the locking member (140) cooperates with the steering member (120).

11. The steering lock device according to claim 5, characterized in that: The locking member (140) is rotatably connected to the housing (110); the steering locking device (100) further comprises an elastic member, the two ends of which are respectively connected to the housing (110) and the locking member (140), so that the locking member (140) has a tendency to disengage from the steering member (120).

12. The steering lock device according to claim 1, wherein: A bayonet (131) is provided on the outer periphery of the thrust member (130), a limiting rod (113) is fixed on the housing (110), and the limiting rod (113) is clamped in the bayonet (131) to limit the rotation of the thrust member (130) relative to the housing (110).

13. An endoscope, characterized in that: The endoscope comprises the steering locking device (100) according to any one of claims 1 to 12.

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