CN112603250A

CN112603250A - Steering locking device and endoscope

Info

Publication number: CN112603250A
Application number: CN202011552822.2A
Authority: CN
Inventors: 刘峰亮; 王继伟; 张锋; 高端贵; 顾威
Original assignee: Micro Tech Nanjing Co Ltd
Current assignee: Micro Tech Nanjing Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-04-06

Abstract

The embodiment of the invention provides a steering locking device and an endoscope, and relates to the technical field of medical instruments. The steering locking device provided by the embodiment of the invention comprises a shell, a steering piece and a locking piece, wherein the steering piece is rotatably connected to the shell and is used for steering an imaging catheter of an endoscope, and particularly, the steering piece is operated to rotate relative to the shell so as to drive the distal end of the imaging catheter to steer. The locking member is connected to the housing and can be relatively close to or far from the rotation axis of the steering member to engage with or disengage from the steering member. When the locking member is matched with the steering member, the steering member is fixed relative to the shell; when the locking member is disengaged from the steering member, the steering member can rotate relative to the housing. The locking piece moves in the radial direction of the steering piece to realize locking of the steering piece, so that the locking of the steering piece is more stable and reliable, the influence caused by failure of the locking piece in the diagnosis and treatment process can be effectively improved, and the control of the accurate rotation angle of the imaging catheter is realized.

Description

Steering locking device and endoscope

Technical Field

The invention relates to the technical field of medical instruments, in particular to a steering locking device and an endoscope.

Background

The endoscope is a detection instrument with a direct-viewing function, and enters a human body through a natural duct of the human body or a small incision made by an operation, so that the operation can be performed under the direct viewing of the endoscope. The use of the endoscope is gradually accepted by the market, for example, when the biliary tract subsystem is used, the pathological changes and calculus conditions in the biliary tract can be observed through the camera provided by the biliary tract subsystem, compared with the traditional ERCP (retrograde cholangiography by using a duodenoscope), the accuracy of the treatment of the biliary tract diseases is greatly improved, meanwhile, the incidence rate of complications is not increased, and the safety of the biliary tract system is further verified.

When using the choledochoscope system clinically, need control the direction of rotation of formation of image pipe distal end, and need lock the distal end of formation of image pipe at the current position after adjusting, however the mode of the coaxial removal of adoption of current choledochoscope moves so that the rotation piece locks through pushing away the rotation piece and moving along the axis of rotation, and locking effect is poor, can not realize the accurate turned angle control of formation of image pipe.

Disclosure of Invention

The invention aims to provide a steering locking device which can improve the technical problems of poor locking effect and incapability of realizing accurate steering angle control of an imaging catheter in the prior art.

The invention also aims to provide an endoscope which can improve the technical problems of poor locking effect and incapability of realizing accurate steering angle control of an imaging catheter in the prior art.

Embodiments of the invention may be implemented as follows:

an embodiment of the invention provides a steering locking device for an endoscope, which comprises a shell, a steering piece and a locking piece, wherein the steering piece is used for steering an imaging catheter of the endoscope; the steering member is rotatably connected to the housing, the locking member is connected to the housing, and the locking member can be relatively close to or far away from the rotation axis of the steering member so as to be matched with or separated from the steering member;

the locking piece is used for being matched with the steering piece so that the steering piece is in a locking state, the steering piece is fixed relative to the shell, or the locking piece is used for being separated from the steering piece so that the steering piece is in an unlocking state, and the steering piece can rotate relative to the shell.

Optionally, a first clamping portion is arranged on the steering piece, and a second clamping portion is arranged on the locking piece; the second clamping portion is used for being clamped with the first clamping portion so that the steering piece is in the locking state, or the second clamping portion is used for being separated from the first clamping portion so that the steering piece is in the unlocking state.

Optionally, first joint portion is including setting up turn to a plurality of tooth grooves of piece periphery, second joint portion for set up in the latch of locking piece, work as the tooth groove with when the latch meshing, turn to the piece and be in locking state.

Optionally, the number of the latch teeth is multiple, and the plurality of latch teeth are all used for being meshed with the tooth grooves.

Optionally, the number of the latch teeth is three; two adjacent become the contained angle setting between the latch, and adjacent two the crossing point of the central line of latch is located the extending direction of tooth root to the addendum of latch.

Optionally, an included angle between two adjacent latches is a, an included angle between two adjacent tooth sockets is B, and a is equal to B.

Optionally, the steering member has a first contact surface and the locking member has a second contact surface for frictionally contacting the first contact surface to place the steering member in the locked state or for disengaging the first contact surface to place the steering member in the unlocked state.

Optionally, the steering lock device further comprises a pressing member disposed on the housing, and the pressing member is configured to apply a force to the locking member, the force being directed to the steering member, so that the locking member engages with the steering member.

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

the first abutting surface is used for abutting against the locking piece so that the locking piece is matched with the steering piece; the second conflict face is used for conflicting with the retaining member to make the locking member with the steering member breaks away from.

Optionally, the pressing piece comprises a pressing block and a handle, the pressing block is rotatably connected with the housing, and the first abutting surface and the second abutting 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 so as to drive the pressing block to rotate by applying external force to the handle.

Optionally, the first collision surface and the second collision surface are in smooth transition through an arc surface.

Optionally, the locking element further comprises a resilient arm, one end of the resilient arm is used for cooperating with the steering element, and the other end of the resilient arm is connected with the housing; the resilient arm is used to provide the locking member with a tendency to disengage from the steering member.

Optionally, the resilient arm is rotatably connected with the housing; be provided with on the shell and be located spacing arch on the rotation orbit of elastic arm, spacing arch be used for with the elastic arm is contradicted, in order the locking piece with when turning to the piece cooperation, make the elastic arm takes place to deform.

Optionally, the locking member is rotatably connected with the housing; the steering locking device further comprises an elastic member, and two ends of the elastic member are respectively connected with the shell and the locking member, so that the locking member has a tendency to be disengaged from the steering member.

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 disposed, and the locking member is configured to simultaneously cooperate with the first steering member and the second steering member, so that both the first steering member and the second steering member are in a locked state.

Optionally, the steering lock further comprises a thrust member; the thrust member is located between the first steering member and the second steering member in an axial direction of the steering member to isolate the first steering member from the second steering member.

Optionally, a bayonet is arranged on the periphery of the thrust piece, a limiting rod is fixed on the housing, and the limiting rod is clamped on the bayonet to limit the thrust piece to rotate relative to the housing.

Embodiments of the present invention also provide an endoscope. The endoscope comprises a steering locking device, wherein the steering locking device comprises a shell, a steering piece and a locking piece, and the steering piece is used for steering an imaging catheter of the endoscope; the steering member is rotatably connected to the housing, the locking member is connected to the housing, and the locking member can be relatively close to or far away from the rotation axis of the steering member so as to be matched with or separated from the steering member; the locking piece is used for being matched with the steering piece so that the steering piece is in a locking state, the steering piece is fixed relative to the shell, or the locking piece is used for being separated from the steering piece so that the steering piece is in an unlocking state, and the steering piece can rotate relative to the shell.

The steering locking device and the endoscope of the embodiment of the invention have the beneficial effects that:

embodiments of the present invention provide a steering lock device for an endoscope. The steering locking device comprises a shell, a steering piece and a locking piece, wherein the steering piece is rotatably connected to the shell and is used for steering the imaging catheter of the endoscope, and specifically, the steering piece is operated to rotate relative to the shell so as to drive the distal end of the imaging catheter to steer. The locking member is connected to the housing and can be relatively close to or far from the rotation axis of the steering member to be engaged with or disengaged from the steering member. When the locking piece is matched with the steering piece, the rotating piece is in a locking state, and the steering piece is fixed relative to the shell at the moment; when the locking member is disengaged from the steering member, the steering member is in an unlocked state, in which the steering member is rotatable relative to the housing. The locking piece is moved in the radial direction of the steering piece to realize locking of the steering piece, so that the locking of the steering piece is more stable and reliable, the influence caused by failure of the locking piece in the diagnosis and treatment process can be effectively improved, the control of the accurate rotating angle of the imaging catheter is realized, and the diagnosis and treatment efficiency is further improved.

Embodiments of the present invention also provide an endoscope comprising the steering lock device described above. Since the endoscope includes the above-described steering lock device, the endoscope also has all the advantageous effects of the steering lock device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of a steering lock device provided in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a steering lock according to an embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of the steering lock device in a second view according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of a steering member in the steering lock apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a lock in the steering lock device according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a steering member in an unlocked position in the steering lock apparatus provided in accordance with an embodiment of the present invention;

fig. 7 is a schematic structural view of another steering lock device according to an embodiment of the present invention.

Icon: 100-a steering lock; 110-a housing; 111-a first housing; 112-a second housing; 113-a limiting rod; 114-a containment chamber; 115-opening; 116-a first shaft; 117-second shaft; 118-a stop protrusion; 119-wire sheath; 120-a steering member; 121-a first steering member; 122-a second steering member; 123-steering wheels; 1231-a first steering wheel; 1232-a second steerable wheel; 124-gear portion; 1241-a first gear portion; 1242-second gear part; 125-a first clamping part; 126-an arc-shaped slot; 127-first connecting shaft; 128-a second connection shaft; 129-a first contact surface; 130-a thrust piece; 131-bayonet; 140-a locking member; 141-a resilient arm; 142-a first end; 143-a second end; 144-a second snap-in part; 145-first latch; 146-a second latch; 147-third latch; 148-a second contact surface; 150-a compression member; 151-a compression block; 152-a first interference surface; 153-a second interference surface; 154-a handle; 161-a first hand wheel; 162-second hand wheel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic overall structure diagram of a steering lock device 100 provided in this embodiment, fig. 2 is a schematic cross-sectional structure diagram of the steering lock device 100 provided in this embodiment at a first viewing angle, and fig. 3 is a schematic internal structure diagram of the steering lock device 100 provided in this embodiment at a second viewing angle. Referring to fig. 1, 2 and 3 in combination, the present embodiment provides a steering lock device 100, and accordingly, an endoscope (not shown).

The endoscope includes a steering lock 100, while the endoscope also includes an imaging catheter (not shown) having a proximal end coupled to the housing 110 of the steering lock 100 and a control wire (not shown) within the imaging catheter coupled to the steering member 120 of the steering lock 100 such that when the steering member 120 is rotated relative to the housing 110, the control wire is pulled to steer the distal end of the imaging catheter.

The steering lock device 100 includes a housing 110, a steering member 120 and a locking member 140, wherein the steering member 120 is rotatably connected to the housing 110, and the steering member 120 is used for steering the imaging catheter of the endoscope, specifically, steering the distal end of the imaging catheter by steering the steering member 120 to rotate relative to the housing 110. The locking member 140 is coupled to the housing 110, and the locking member 140 can be relatively close to or far from the rotational axis of the steering member 120 to engage or disengage with the steering member 120. When the locking member 140 is engaged 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 is disengaged 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 part 120 is realized through the radial movement of the locking part 140 on the steering part 120, so that the locking of the steering part 120 is more stable and reliable, the influence caused by locking failure in the diagnosis and treatment process can be effectively improved, the control of the accurate rotation angle of the imaging catheter is realized, and the diagnosis and treatment efficiency is further improved.

The steering lock device 100 provided in the present embodiment is further explained below:

referring to fig. 1 to fig. 3, in the present embodiment, the outer shell 110 includes a first shell 111 and a second shell 112 (as shown in fig. 2) that are fastened to each other, the first shell 111 and the second shell 112 are fastened to form a receiving cavity 114 through the first shell 111 and the second shell 112, and the steering member 120 and the locking member 140 are disposed in the receiving cavity 114. While an opening 115 is provided at the distal end of the housing 110 in communication with the receiving cavity 114, the proximal end of the imaging catheter is attached to the distal end of the housing 110, and the control wire of the imaging catheter extends into the receiving cavity 114 through the opening 115 to connect with the steering member 120 within the receiving cavity 114. Specifically, the housing 110 further includes a wire sheath 119 mounted on the distal ends of the first and

second housings

111 and 112, and the opening 115 is opened in the wire sheath 119.

It should be noted that in the description of the present 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 the component is used, and 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 the component is used. Meanwhile, because the steering lock device 100 is located outside the human body during use, the end of the imaging catheter close to the steering lock device 100 is the proximal end of the imaging catheter, and the end of the imaging catheter relatively far from the steering lock device 100 is the distal end of the imaging catheter.

Fig. 4 is a schematic structural diagram of a steering member 120 in the steering lock device 100 according to the present embodiment. Referring to fig. 1 to 4, a first engaging portion 125 is disposed on the steering member 120, a second engaging portion 144 is disposed on the locking member 140, the second engaging portion 144 is engaged with the first engaging portion 125 to lock the steering member 120, the steering member 120 is fixed relative to the housing 110, or the second engaging portion 144 is disengaged from the first engaging portion 125 to unlock the steering member 120, the steering member 120 is rotatable relative to the housing 110, that is, when the second engaging portion 144 is engaged with the first engaging portion 125, the steering member 120 is in a locked state, and when the second engaging portion 144 is disengaged from the first engaging portion 125, the steering member 120 is in an unlocked state.

Alternatively, the first catching portion 125 includes a plurality of teeth grooves provided on the outer circumference of the steering member 120, and the second catching portion 144 is a catch provided on the locking member 140. When the tooth grooves are engaged with the latches, the steering member 120 is in a locked state.

Specifically, the steering member 120 includes a steering wheel 123 and a gear portion 124 disposed on one side of the steering wheel 123 in the axial direction, a plurality of gear teeth are uniformly distributed on the outer periphery of the gear portion 124, and tooth slots are formed between adjacent gear teeth, in other words, the plurality of tooth slots are uniformly distributed on the outer periphery of the steering member 120 in the circumferential direction of the steering member 120. The tooth grooves are located radially outside the outer periphery of the steering wheel 123, i.e. the distance of the tooth tips of the gear teeth to the axis of the steering member 120 is greater than the outer diameter dimension of the steering wheel 123. The locking member 140 is disposed radially outside the gear portion 124, and the latch is movable relative to the housing 110 to engage or disengage the latch with or from the spline. Alternatively, the steering wheel 123 and the gear portion 124 are of an integral structure. It is understood that in other embodiments, the fixed connection between the steering wheel 123 and the gear portion 124 can be implemented in other manners, for example, fasteners are used to connect the steering wheel 123 and the gear portion 124 at the same time, so as to fixedly connect the steering wheel 123 and the gear portion 124.

It should be noted that, in this embodiment, the tooth socket is formed between two adjacent gear teeth on the gear portion 124, and it is understood that, in other embodiments, the shape of the tooth socket and the position of the tooth socket may be set according to requirements, for example, the tooth socket is set to have a trapezoidal cross section, or a tooth sector portion is set on one axial side of the steering wheel 123, and the tooth socket is a space formed between adjacent teeth of the tooth sector portion, which can meet the steering requirement of the distal end of the imaging catheter.

Optionally, the quantity of latch is a plurality of, and a plurality of latches all are used for with the tooth's socket meshing, a plurality of latches mesh with a plurality of tooth's sockets simultaneously promptly to further guarantee the locking effect, lock more reliable and more stable. In the present embodiment, the number of the latch teeth is three, two adjacent latch teeth are arranged at an included angle, and an intersection point of center lines (shown by a chain line in fig. 5) of two adjacent latch teeth is located in an extending direction from a tooth root to a tooth tip of the latch teeth, in other words, an intersection point of center lines of two adjacent latch teeth is located on a side of the locking member 140 where the latch teeth are arranged, that is, a side of the locking member 140 close to the steering member 120. It is understood that in other embodiments, the number of the latches may be specifically set according to requirements, for example, the number of the latches is set to be one, two, or four, etc.

Fig. 5 is a schematic structural diagram of the locking member 140 in the steering locking device 100 according to the present embodiment. Referring to fig. 5, specifically, two adjacent latches form an included angle, that is, the center lines of two adjacent latches form an included angle. The three latches are respectively a first latch 145, a second latch 146 and a third latch 147 which are arranged in sequence. When the first and second catching

portions

125 and 144 are caught, the first, second, and third catching

teeth

145, 146, and 147 simultaneously mesh with the adjacent three tooth grooves. While an extension line of the center line of the second latch 146 intersects with the axis of the gear portion 124. The first latch 145 and the second latch 146, and the third latch 147 and the second latch 146 are respectively disposed at an included angle, and an intersection point of center lines of the first latch 145 and the second latch 146 is located at one side of the locking member 140 close to the steering member 120, that is, the tooth top of the first latch 145 inclines to a direction close to the second latch 146; the intersection point of the center lines of the second latch 146 and the first latch 145 is located on the side of the locking member 140 close to the steering member 120, i.e., the tip of the third latch 147 is inclined in a direction close to the second latch 146.

Since the first latch 145 is disposed to be inclined toward the second latch 146, the first latch 145 applies a force to the gear portion 124 to move toward the second latch 146 in the process of engaging the first latch 145 with the tooth groove; meanwhile, the third latch 147 is obliquely arranged towards the second latch 146, so that in the process of clamping the third latch 147 with the tooth socket, the third latch 147 applies acting force to the gear part 124 to move towards the second latch 146, and the first latch 145 and the third latch 147 are respectively positioned at two sides of the second latch 146, so that the acting force applied to the gear part 124 by the first latch 145 and the second latch 146 is opposite in direction, so that the clamping effect can be ensured, the latch is automatically aligned with the tooth socket, the latch is smoothly meshed with the tooth socket, the latch is completely matched with the tooth socket, and the steering member 120 is better locked.

Optionally, an included angle between two adjacent latches is a, an included angle between two adjacent tooth sockets is B, and a is equal to B. Specifically, an included angle between the first latch 145 and the second latch 146 and an included angle between the second latch 146 and the third latch 147 are both a, an included angle between two adjacent tooth sockets is B, and a is equal to B, so that the latch and the tooth sockets are more stably engaged, and further the locking of the steering member 120 is more stable and reliable.

Optionally, the outer circumferential wall of the diverting wheel 123 is provided with an arc-shaped groove 126, which arc-shaped groove 126 extends circumferentially along the diverting wheel 123. In the circumferential direction of the steering wheel 123, notches are provided at both ends of the arc-shaped groove 126, and the notches penetrate through the end surface of one axial end of the steering wheel 123. When the imaging catheter is used, the control wire in the imaging catheter winds the notch and the arc-shaped groove 126 to be connected with the steering wheel 123, so that the control wire can be pulled in the rotating process of the steering wheel 123 to achieve the purpose of steering the distal end of the imaging catheter.

Referring to fig. 1 to fig. 4, in the present embodiment, the number of the steering members 120 is two, and the two steering members 120 are a first steering member 121 and a second steering member 122, respectively. The first steering member 121 and the second steering member 122 are coaxially disposed, and the first clamping portion 125 of the first steering member 121 and the first clamping portion 125 of the second steering member 122 are used for clamping with the second clamping portion 144 at the same time, so that the first steering member 121 and the second steering member 122 are both in a locking state.

Specifically, 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 slot 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 socket of the second gear portion 1242. The imaging catheter is provided with two groups of control lines, wherein one group of control lines is connected with the first steering wheel 1231, so that the distal end of the imaging catheter is driven by the first steering wheel 1231 to rotate in the up-and-down direction, and the adjustment of the distal end of the imaging catheter in the up-and-down direction is further realized; the other set of control members is connected to the second steering wheel 1232, so that the distal end of the imaging catheter is driven by the second steering wheel 1232 to rotate in the left-right direction, thereby achieving the adjustment of the distal end of the imaging catheter in the left-right direction.

The first and

second steering members

121 and 122 are coaxially disposed, and the latch is located at the radial outer side of both the first and

second gear parts

1241 and 1242, so that when the latch moves to the rotation axis close to the first and

second gear parts

1241 and 1242, the latch can be engaged with both the first and

second gear parts

1241 and 1242, so that both the first and

second steering members

121 and 122 are in the locked state, in other words, the first and

second steering members

121 and 122 are locked or unlocked by the same locking member 140. It is understood that in other embodiments, the number of the locking members 140 may be set to correspond to the steering members 120 one by one according to requirements, that is, the first steering member 121 and the second steering member 122 are locked by different locking members 140, so as to facilitate independent control of the first steering member 121 and the second steering member 122.

In the present 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, the second connecting shaft 128 penetrates through the first connecting shaft 127, one end of the second connecting shaft 128, which is far away from the second steering wheel 1232, extends out of the first connecting shaft 127, and both one end of the second connecting shaft 128, which is far away from the second steering wheel 1232, and one end of the first connecting shaft 127, which is far away from the first steering wheel 1231, are located outside the housing 110. The steering lock device 100 further includes a first hand wheel 161 and a second hand wheel 162. First hand wheel 161 is located outside housing 110 and is fixedly attached to first coupling shaft 127 for enabling steering of first steering wheel 1231 and thus adjustment of the distal end of the imaging catheter in an up-and-down direction by rotating first hand wheel 161. The second handwheel 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 steered by rotating the second handwheel 162, and the adjustment of the distal end of the imaging catheter in the left-right direction can be realized.

Optionally, the steering lock device 100 further includes a thrust member 130, and the thrust member 130 is located between the first steering member 121 and the second steering member 122 in the axial direction of the steering member 120 to isolate the first steering member 121 and 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, i.e., the first steering wheel 1231 is located at a side of the first gear portion 1241 close 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 part 1242, i.e. the second steering wheel 1232 is located on the side of the second gear part 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, and thus when the first steering wheel 1231 is rotated by the first hand wheel 161, the second steering wheel 1232 can be prevented from being rotated by the influence of the first steering wheel 1231, and 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 rotated by the influence of the second steering wheel 1232.

Optionally, the thrust piece 130 is provided with a bayonet 131 on the outer circumference thereof, the limiting rod 113 is fixed on the housing 110, and the limiting rod 113 is clamped on the bayonet 131 to limit the rotation of the thrust piece 130 relative to the housing 110. Specifically, the thrust piece 130 is annular, a branch portion extending in the radial direction of the thrust piece 130 is provided on the radial direction outer side of the thrust piece 130, the bayonet 131 is opened in the branch portion, and the bayonet 131 is U-shaped. When the limiting rod 113 is clamped in the bayonet 131, the rotation of the thrust piece 130 relative to the housing 110 is locked, so as to prevent the thrust piece 130 from being driven to rotate during the rotation of the first steering wheel 1231 or the second steering wheel 1232.

Fig. 6 is a schematic structural view of the steering member 120 in the unlocked position in the steering lock device 100 according to the present embodiment. Referring to fig. 3 and fig. 6, in the present embodiment, the steering lock device 100 further includes a pressing member 150 disposed on the housing 110, and the pressing member 150 is configured to apply a force to the locking member 140 and directed to the steering member 120, so that the locking member 140 rotates in a direction close to the rotation axis of the steering member 120, and the locking member 140 is further engaged with the steering member 120. Specifically, the pressing member 150 is located outside the locking member 140 in the radial direction of the steering member 120, that is, in the radial direction of the steering member 120, and the steering member 120, the locking member 140, and the pressing member 150 are arranged in this order. The pressing member 150 applies a force to the locking member 140 toward the steering member 120, so that the first and second catching

portions

125 and 144 are engaged.

Optionally, the pressing member 150 is rotatably connected to the housing 110 along a predetermined axis, and the pressing member 150 has a first interference surface 152 and a second interference surface 153 disposed around the predetermined axis, and a distance between the first interference surface 152 and the predetermined axis is greater than a distance between the second interference surface 153 and the predetermined axis. The first interference surface 152 is used for interfering with the locking member 140 so as to enable the locking member 140 to be matched with the steering member 120. The second interference surface 153 is used for interfering with the locking member 140 to separate the locking member 140 from the direction-changing member 120.

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 the first contact surface and the second contact surface are both disposed 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 to operate 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 through the first rotating shaft 116, and the preset axis is an axis of the first rotating shaft 116. The first interference surface 152 and the second interference surface 153 are provided around the first rotation shaft 116, so that the wall surface of the pressing block 151 with which the locking member 140 interferes can be switched between the first interference surface 152 and the second interference surface 153 by the rotation of the pressing block 151. When the first abutting surface 152 abuts against the locking member 140, the first engaging portion 125 engages with the second engaging portion 144; when the second abutting surface 153 abuts against the locking member 140, the second engaging portion 144 is disengaged from the first engaging portion 125.

The distance between the first interference surface 152 and the first rotating shaft 116 is greater than the distance between the second interference surface 153 and the first rotating shaft 116, so that the distance between the locking member 140 and the first rotating shaft 116 when the first interference surface 152 is interfered with the locking member 140 is greater than the distance between the locking member 140 and the first rotating shaft 116 when the second interference surface 153 is interfered with the locking member 140, and accordingly, the distance between the locking member 140 and the steering member 120 when the first interference surface 152 is interfered with the locking member 140 is less than the distance between the locking member 140 and the steering member 120 when the second interference surface 153 is interfered with the locking member 140, so that the pressing and the separation are realized through the difference of the distances between the first interference surface 152 and the second interference surface 153 relative to the first rotating shaft 116. When the first interference surface 152 interferes with the locking member 140, the latch of the locking member 140 is engaged with the spline of the steering member 120; when the second interference surface 153 interferes with the locking member 140, the latch of the locking member 140 is disengaged from the notch of the steering member 120.

Optionally, the first abutting surface 152 and the second abutting surface 153 are both flat surfaces, so as to ensure that when the first abutting surface 152 and the second abutting surface 153 abut against the locking member 140 respectively, a sufficient contact area is provided, and the pressing effect is good. Optionally, the first collision surface 152 and the second collision surface 153 are smoothly transited by an arc surface so as to switch the wall surface colliding with the locking member 140.

Referring to fig. 3, fig. 5 and fig. 6, in the present embodiment, the locking element 140 further includes an elastic arm 141, the second locking portion 144 is disposed at one end of the elastic arm 141, the other end of the elastic arm 141 is connected to the housing 110, and the elastic arm 141 is used to make the locking element 140 have a tendency to disengage from the steering element 120. Specifically, when the handle 154 is rotated in the forward direction to switch the wall surface of the pressing member 150 abutting against the locking member 140 from the second abutting surface 153 to the first abutting surface 152, the second engaging portion 144 moves in the direction approaching the steering member 120, and the elastic arm 141 is deformed; when the handle 154 is rotated reversely to switch the wall surface of the pressing member 150 contacting the locking member 140 from the first abutting surface 152 to the second abutting surface 153, the second engaging portion 144 moves away from the steering member 120 under the elastic restoring force of the elastic arm 141, so that the second engaging portion 144 tends to disengage from the first engaging portion 125, and meanwhile, the locking member 140 always abuts against the pressing block 151 during the process.

Optionally, the elastic arm 141 is rotatably connected to the housing 110, the housing 110 is provided with a limiting protrusion 118 located on a rotation track of the elastic arm 141, and the limiting protrusion 118 is used for abutting against an elastic arm 141, so as to deform 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 to each other, the first end 142 of the elastic arm 141 is rotatably connected to the housing 110 by 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 is close to or away from the steering member 120, so that the second engaging portion 144 is engaged with or disengaged from the first engaging portion 125, and meanwhile, in the process that the second end 143 of the elastic arm 141 is close to the steering member 120, the limiting protrusion 118 abuts against the first end 142 of the elastic arm 141 to limit the rotation of the first end 142, so that the elastic arm 141 deforms. It will be appreciated that in other embodiments, the first end 142 of the resilient arm 141 may be fixedly attached to the housing 110 such that the resilient arm 141 deforms as the second end 143 moves closer to the steering member 120.

It should be noted that, in this embodiment, the locking member 140 has elasticity, and the elastic arm 141 of the locking member 140 elastically deforms to separate the second clamping portion 144 from the first clamping portion 125, it can be understood that, in other embodiments, an elastic member may be additionally disposed, two ends of the elastic member are respectively connected with the housing 110 and the locking member 140, so that the second clamping portion 144 has a tendency to separate from the first clamping portion 125 through the elastic force of the elastic member, and the elastic member may be configured as a torsion spring, a spring plate, or the like.

According to the steering lock device 100 provided in the present embodiment, the operation principle of the steering lock device 100 is as follows:

when the imaging catheter is used, the handle 154 is rotated to enable the first steering member 121 and the second steering member 122 to be in an unlocked state, then the first hand wheel 161 and/or the second hand wheel 162 are/is rotated according to requirements to adjust the angular position of the distal end of the imaging catheter, after the adjustment is completed, the handle 154 is rotated in the forward direction, the pressing block 151 is driven by the handle 154 to rotate, the second end 143 of the elastic arm 141 is pressed towards the steering member 120, until the latch is meshed with the first gear portion 1241 and the second gear portion 1242 at the same time, and at the moment, the first steering member 121 and the second steering member 122 are both in a locked state.

Fig. 7 is a partial schematic structural view of another steering lock device 100 according to the present embodiment. Referring to fig. 7, the present embodiment further provides another steering lock device 100, which is substantially the same as the steering lock device 100 described above, except that the locking member 140 is engaged with the steering member 120 in a different manner.

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 being for frictional contact with the first contact surface 129 to place the steering member 120 in a locked state or for disengagement from the first contact surface 129. Specifically, the steering member 120 has a friction wheel, the outer peripheral surface of the friction wheel is the first contact surface 129, and the side of the locking member near the friction wheel has a concave surface corresponding to the arc shape of the first contact surface 129, and the concave surface is the second contact surface 148. When the first interference surface 152 of the pressing member 150 interferes with the locking member 140, the second contact surface 148 presses against the first contact surface 129, the second contact surface 148 is in frictional contact with the first contact surface 129, and when the steering member 120 has a tendency to rotate, the steering member 120 is prevented from rotating by the frictional force between the first contact surface 129 and the second contact surface 148; when the second interference surface 153 interferes with the locking member 140, the second contact surface 148 is disengaged from the first contact surface 129, and the steering member 120 is in the unlocked state.

The present embodiment provides a steering lock device 100 having at least the following advantages:

the steering locking device 100 provided by the embodiment of the invention has the advantages that the locking effect is good by arranging the latch and the tooth groove to be meshed so as to lock the steering member 120, meanwhile, when the latch and the tooth groove are meshed, the pressing block 151 presses the locking member 140 tightly, the locking effect is further ensured, the latch is prevented from falling off from the tooth groove, the locking failure in the diagnosis and treatment process and the influence caused by misoperation of hand wheels can be effectively avoided, the operation of a doctor is facilitated, and the diagnosis and treatment efficiency is improved.

The present embodiment also provides an endoscope including the steering lock device 100 described above, and thus has the advantages of good locking effect, high stability and reliability, and contribution to improvement of medical treatment efficiency. The endoscope refers to an endoscope capable of achieving distal end steering of an imaging catheter, and may be a choledochoscope, a duodenoscope, a gastroscope, a bronchoscope, or the like.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A steering lock device for an endoscope, characterized in that the steering lock device (100) comprises a housing (110), a steering member (120) and a locking member (140), the steering member (120) being used for steering an 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 far away from the rotation axis of the steering member (120) so as to be matched with or separated from the steering member (120);

the locking piece (140) is used for being matched with the steering piece (120) so that the steering piece (120) is in a locking state, the steering piece (120) is fixed relative to the shell (110), or is used for being separated from the steering piece (120) so that the steering piece (120) is in an unlocking state, and the steering piece (120) can rotate relative to the shell (110).

2. The steering lock device according to claim 1, wherein the steering member (120) is provided with a first snap portion (125), and the locking member (140) is provided with a second snap portion (144); the second clamping portion (144) is used for clamping with the first clamping portion (125) so that the steering piece (120) is in the locking state, or is used for being separated from the first clamping portion (125) so that the steering piece (120) is in the unlocking state.

3. The steering lock device according to claim 2, wherein the first catching portion (125) includes a plurality of teeth grooves provided on an outer periphery of the steering member (120), and the second catching portion (144) is a catch provided on the locking member (140), and the steering member (120) is in the locked state when the teeth grooves are engaged with the catch.

4. The steering lock device according to claim 3, wherein the number of the latch teeth is plural, and plural latch teeth are each adapted to engage with the tooth groove.

5. The steering lock device according to claim 4, wherein the number of the latches is three; two adjacent become the contained angle setting between the latch, and adjacent two the crossing point of the central line of latch is located the extending direction of tooth root to the addendum of latch.

6. The steering lock device according to claim 5, wherein an angle between two adjacent ones of the latches is A, and an angle between two adjacent ones of the teeth slots is B, where A-B.

7. The steering lock device according to claim 1, wherein 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) being adapted to be in frictional contact with the first contact surface (129) to place the steering member (120) in the locked state, or to be disengaged from the first contact surface (129) to place the steering member (120) in the unlocked state.

8. The steering lock device according to claim 1, characterized in that the steering lock device (100) further comprises a pressing member (150) provided to the housing (110), the pressing member (150) being configured to apply a force directed to the steering member (120) to the locking member (140) to engage the locking member (140) with the steering member (120).

9. Steering lock device according to claim 8, characterized in that said pressing member (150) is rotatably connected to said housing (110) along a predetermined axis, and in that said pressing member (150) has a first abutment surface (152) and a second abutment surface (153) arranged around said predetermined axis, the distance between said first abutment surface (152) and said predetermined axis being greater than the distance between said second abutment surface (153) and said predetermined axis;

the first interference surface (152) is used for interfering with the locking piece (140) so as to enable the locking piece (140) to be matched with the steering piece (120); the second interference surface (153) is used for interfering with the locking piece (140) so as to separate the locking piece (140) from the steering piece (120).

10. The steering lock device according to claim 9, wherein 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 the first interference surface (152) and the second interference 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 shell (110) so as to drive the pressing block (151) to rotate by applying external force to the handle (154).

11. Steering lock according to claim 9, characterized in that the first abutment surface (152) and the second abutment surface (153) are smoothly transitioned by a cambered surface.

12. The steering lock device according to claim 8, wherein the locking member (140) further comprises a resilient arm (141), one end of the resilient arm (141) being adapted to engage with the steering member (120), the other end of the resilient arm (141) being connected to the housing (110); the resilient arm (141) is used to give the locking member (140) a tendency to disengage from the steering member (120).

13. Steering lock according to claim 12, characterized in that the resilient arm (141) is rotationally connected to the housing (110); the shell (110) is provided with a limiting protrusion (118) located on the rotation track of the elastic arm (141), and the limiting protrusion (118) is used for abutting against the elastic arm (141) so as to enable the elastic arm (141) to deform when the locking piece (140) is matched with the steering piece (120).

14. The steering lock according to claim 8, characterized in that the locking member (140) is rotatably connected to the housing (110); the steering lock device (100) further comprises an elastic member, both ends of which are respectively connected with the housing (110) and the locking member (140) so that the locking member (140) has a tendency to be disengaged from the steering member (120).

15. The steering lock device according to any one of claims 1 to 14, characterized in that said steering member (120) comprises a first steering member (121) and a second steering member (122), said first steering member (121) and said second steering member (122) being coaxially arranged, said locking member (140) being adapted to cooperate simultaneously with said first steering member (121) and said second steering member (122) to bring both said first steering member (121) and said second steering member (122) into a locked condition.

16. The steering lock according to claim 15, characterized in that the steering lock (100) further comprises a thrust piece (130); the thrust member (130) is located between the first steering member (121) and the second steering member (122) in an axial direction of the steering member (120) to isolate the first steering member (121) and the second steering member (122).

17. The steering lock device according to claim 16, wherein a bayonet (131) is arranged on the periphery of the thrust piece (130), a limiting rod (113) is fixed on the housing (110), and the limiting rod (113) is clamped on the bayonet (131) to limit the rotation of the thrust piece (130) relative to the housing (110).

18. An endoscope, characterized in that it comprises a steering lock device (100) according to any one of claims 1-17.