CN115153395B

CN115153395B - Reusable section, operating handle and endoscope

Info

Publication number: CN115153395B
Application number: CN202210995120.4A
Authority: CN
Inventors: 周震华
Original assignee: Hunan Vathin Medical Instrument Co Ltd
Current assignee: Hunan Vathin Medical Instrument Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2024-05-17
Anticipated expiration: 2042-08-18
Also published as: CN115153395A

Abstract

The application discloses a reusable segment, an operating handle and an endoscope. The reusable segment comprises a driving wheel, a driven wheel and a transmission piece, wherein: the driving wheel comprises two wheel discs which are oppositely arranged along the axial direction of the driving wheel, and at least one of the two wheel discs is movably arranged along the axial direction of the driving wheel so as to be close to or far from the other wheel disc; the transmission piece is sleeved on the driving wheel and the driven wheel, is propped against and fixed between the two wheel discs, and can rotate along with the driving wheel to drive the traction component of the disposable section of the operating handle; the abutting surface of at least one wheel disc, which abuts against the transmission piece, is a conical surface. The scheme can optimize the universality of the reusable segments.

Description

Reusable section, operating handle and endoscope

Technical Field

The application relates to the technical field of medical instruments, in particular to a reusable section, an operating handle and an endoscope.

Background

An endoscope is used as a professional medical instrument, and after entering a human body, the endoscope can adjust the orientation of a camera positioned at the far end by controlling the bending of a bending part, so that the image of a focus can be accurately acquired.

In the related detachable endoscope technology, the operating handle comprises a reusable section and a disposable section, and after the operation is finished, only the disposable section is needed to be discarded and the reusable section is reserved, so that cross infection can be avoided, and the discarding cost can be reduced. However, since the types of endoscopes are many, different types of endoscopes have different bending amplitude requirements for the bending section in the insertion section, which results in that the reusable section and the disposable section, which are classified into different types of endoscopes, are difficult to fit in terms of specifications, and thus it is seen that the reusable section has a disadvantage of poor versatility.

Disclosure of Invention

The application discloses a reusable segment, an operating handle and an endoscope, which can optimize the universality of the reusable segment.

In order to solve the problems, the application adopts the following technical scheme:

in a first aspect, the present application provides a reusable segment for use with an operating handle of an endoscope, the reusable segment comprising a drive wheel, a driven wheel and a transmission, wherein:

the driving wheel comprises two wheel discs which are oppositely arranged along the axial direction of the driving wheel, and at least one of the two wheel discs is movably arranged along the axial direction of the driving wheel so as to be close to or far from the other wheel disc;

The transmission piece is sleeved on the driving wheel and the driven wheel, is propped against and fixed between the two wheel discs, and can rotate along with the driving wheel to drive the traction component of the disposable section of the operating handle;

the abutting surface of at least one wheel disc, which abuts against the transmission piece, is a conical surface.

In a second aspect, the present application provides an operating handle comprising a disposable segment and a reusable segment according to the first aspect of the present application, the reusable segment being detachably connected to the disposable segment.

In a third aspect, the present application provides an endoscope comprising the operating handle of the second aspect of the present application.

In the reusable section, the operating handle and the endoscope disclosed by the application, the abutting surface of at least one wheel disc in the driving wheel is a conical surface, and under the condition that the two wheel discs are close to or far away from each other, the conical surface can force the transmission member to move outwards along the radial direction of the driving wheel, or the transmission member resets inwards along the radial direction of the driving wheel along the conical surface, under the structural layout, the driving wheel can adjust the transmission radius of the driving wheel along with the movement of the wheel disc, so that the transmission ratio between the driving wheel and the driven wheel can be adjusted, and the bending section with different bending amplitude requirements is adapted through the traction assembly.

Therefore, compared with the related art, the reusable section can be used for realizing the speed change control of the transmission part, and can be used for butting the disposable sections with different specifications, so that the universality of the reusable section is effectively optimized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application.

In the drawings:

FIG. 1 is a schematic view of an endoscope according to an embodiment of the present application;

FIG. 2 is a schematic view showing an exploded structure of an endoscope according to an embodiment of the present application;

FIG. 3 is a schematic view of an endoscope according to an embodiment of the present application at another view angle;

FIG. 4 is a schematic illustration of the configuration of a reusable segment prior to ratio change in accordance with an embodiment of the present application;

FIG. 5 is a schematic diagram of the transmission principle of the reusable segment prior to ratio change in accordance with an embodiment of the present application;

FIG. 6 is a schematic diagram of the reusable segment of the present application following gear ratio changes in accordance with an embodiment of the present application;

FIG. 7 is an enlarged schematic view of a portion of FIG. 6A;

FIG. 8 is a schematic diagram of the transmission principle of the reusable segment after a change in transmission ratio in accordance with an embodiment of the present application;

FIG. 9 is an enlarged schematic view of a portion of the portion of FIG. 8B;

FIG. 10 is a schematic illustration of an exploded construction of a reusable segment disclosed in an embodiment of the present application;

FIG. 11 is an enlarged schematic view of a portion of FIG. 10 at C;

Fig. 12 is a schematic view of a reusable segment hidden portion of a housing according to an embodiment of the present application.

Reference numerals illustrate:

100-reusable segment,

110-Shell, 111-guide seat, 111 a-flanging, 111 b-guide groove, 1101-guide space,

120-Driving wheel, 121-first wheel disc, 122-second wheel disc, 123-first wheel axle, 123 a-limit key, 1201-abutting surface, 1202-chute,

130-Driven wheel, 131-wheel body, 131 a-recess, 132-second wheel axle, 132 a-slider, 132a 1-slide,

140-Driving part, 141-ball, 142-connecting line, 1401-first connecting section, 1402-second connecting section,

150-A first adjusting piece, 160-a second adjusting piece, 161-a sleeve part, 170-a first elastic piece,

180-First butt joint piece, 181-first butt joint rod, 182-second butt joint rod, 1801-first rod section, 1802-second rod section,

190-Second elastic member, 1100-adapter member, 1110-locking member, 1120-engagement sheath,

200-Disposable segment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The technical scheme disclosed by each embodiment of the application is described in detail below with reference to the accompanying drawings.

In order to solve the technical problem of poor universality of the reusable segment in the related art, the embodiment of the application provides the reusable segment which is applied to an operating handle of an endoscope.

Referring to fig. 1-12, a reusable segment 100 of an embodiment of the present application includes a driving wheel 120, a driven wheel 130, and a driving member 140. Of course, the reusable segment 100 of an embodiment of the present application also includes a housing 110.

The housing 110 is a basic component of the reusable segment 100, which provides a mounting base for other components, and components such as the driving wheel 120, the driven wheel 130, the transmission member 140, etc. are all disposed in the housing 110, so that the housing 110 also plays a protective role to a certain extent.

The transmission member 140 is sleeved on the driving wheel 120 and the driven wheel 130, and the transmission member 140 can rotate along with the driving wheel 120 to drive the traction assembly of the disposable section 200 of the operation handle. It should be appreciated that when the user controls the rotation of the driving wheel 120, the transmission member 140 may be transmitted to the driving wheel 120 and the driven wheel 130 accordingly; after the reusable section 100 and the disposable section 200 are butt assembled, a connection is established between the driving member 140 within the reusable section 100 and the pulling assembly within the disposable section 200, which pulls the pulling assembly when the driving member 140 is driven, thereby pulling the curved section in the insertion portion of the endoscope through the pulling assembly. Illustratively, where the curved segment is a snake bone solution, the pulling assembly is used to pull the snake bone, thereby effecting the bending action of the curved segment.

As shown in fig. 3 and 10, the reusable segment 100 may include a first adjustment member 150, where the first adjustment member 150 is connected to the capstan 120, and in particular may be connected to a first axle 123 of the capstan 120, and when the first adjustment member 150 is rotated, the first adjustment member 150 may drive the first axle 123 to control the capstan 120 to rotate. The specific structural form of the first control 150 may be a toggle lever, a handle, etc.

The pulling assembly typically includes a plurality of pull cords, and in embodiments where the pull cords are provided on different sides, bending is achieved by pulling on the pull cords on the sides to bend the bending section toward the sides, thereby effecting bending of the insertion portion of the endoscope in different directions.

The reusable section 100 may include a first docking member 180 coupled to the driving member 140 and the disposable section 200 may include a second docking member coupled to the traction assembly, with the reusable section 100 and the disposable section 200 being dock assembled by mating the first docking member 180 and the second docking member to establish a connection between the driving member 140 and the traction assembly.

Optionally, as shown in fig. 1 to 3, the reusable segment 100 may include an engagement sheath 1120, where the engagement sheath 1120 is used to connect the housing 110 of the reusable segment 100 and the disposable segment 200, and is sleeved on the outer periphery of the first docking member 180 and/or the second docking member, so as to play a role in protection, and meanwhile, the engagement sheath 1120 can avoid the exposure of the docking structure, so that the aesthetic property of the operating handle can be further improved.

In the embodiment of the present application, the driving wheel 120 includes two wheel discs disposed opposite to each other in the axial direction thereof, and at least one of the two wheel discs is movably disposed in the axial direction of the driving wheel 120 to be close to or apart from the other. Specifically, the capstan 120 includes a first axle 123, and the roulette wheel is movable in the axial direction of the capstan 120 by being movable along the first axle 123. In the case where only one wheel is movably provided, the distance between the two wheels can be adjusted by moving the wheel; in the case where both of the wheel discs are movably provided, the distance between the two wheel discs can be adjusted by moving both of the wheel discs at the same time.

At the same time, the transmission member 140 is held against and fixed between the two wheel discs, and an abutment surface 1201 of at least one wheel disc, which abuts against the transmission member 140, is a tapered surface. It should be understood that, since the transmission member 140 is fixed between the two wheel discs, the transmission member 140 is fixed relative to the driving wheel 120, and the transmission member 140 can perform a transmission function when the driving wheel 120 is controlled to rotate. In the two disks, only one of the contact surfaces 1201 may be a tapered surface, or both of the contact surfaces 1201 of the two disks may be tapered surfaces (as shown in fig. 9).

It is due to the abutment surface 1201 configured as a conical surface that, in the case of two discs approaching one another, based on newton's third law, there will be a component of the reaction force applied to the driving member 140 by the conical surface radially outwardly of the driving wheel 120, which component will drive the driving member 140 radially outwardly of the driving wheel 120, thereby increasing the transmission radius of the driving wheel 120. When the two wheel discs are away from each other, the moving wheel discs do not have the function of propping against the driving member 140 through the conical surface, and the distance between the two wheel discs is increased, so that the driving member 140 can move inwards along the radial direction of the driving wheel 120 along with the surface track of the conical surface to realize resetting, thereby reducing the transmission radius of the driving wheel 120.

In embodiments where the abutment surfaces 1201 of both sheaves are conical, the force conditions of the driving member on opposite sides thereof are more balanced, thereby optimizing its stability during driving and radial movement of the drive wheel 120.

It should be noted that, no matter the two wheel discs are close to each other or far from each other, the transmission member 140 needs to be tensioned to ensure that the transmission member 140 can smoothly realize the transmission function between the driving wheel 120 and the driven wheel 130, so that the transmission member 140 can smoothly realize the reset to reduce the transmission radius of the driving wheel 120 when the wheel discs are far away from each other.

Next, the working principle of the reusable segment 100 of the present application will be specifically described with the embodiments shown in fig. 4 to 6 and 8.

As shown in fig. 4 and 5, the fact that the transmission member 140 is substantially parallel to the first connecting section 1401 and the second connecting section 1402 between the driving wheel 120 and the driven wheel 130 indicates that the transmission radii of the driving wheel 120 and the driven wheel 130 are substantially equal, and in this case, the angular speeds of the driving wheel 120 and the driven wheel 130 are substantially equal, and the transmission ratio of the two is substantially equal to 1. The transmission radius of the driving wheel 120 is assumed to be r1, and when the rotation angle a of the driving wheel 120 is controlled by the first control 150, the transmission distance of the transmission member 140 is L1.

As shown in fig. 6 and 8, by controlling the wheel discs to move toward each other so that the two wheel discs approach each other, the transmission member 140 moves outward in the axial direction of the driving wheel 120 under the abutment of the tapered surface, thereby increasing the transmission radius of the driving wheel 120. In this case, the transmission radius of the driving wheel 120 is larger than that of the driven wheel 130, the angular velocity of the driving wheel 120 is obviously smaller than that of the driven wheel 130, and the transmission ratio of the two is smaller than 1. The transmission radius of the driving wheel 120 is assumed to be r2, and when the driving wheel 120 is controlled to rotate by the same angle a through the first control 150, the transmission distance of the transmission member 140 is L2.

As can be seen from comparison, since the transmission radius r2 is larger than r1, and the driving wheel 120 is controlled to rotate by the same angle a, and the arc length of the transmission member 140 rotating along with the driving wheel 120 is proportional to the transmission radius, it can be stated that the transmission distance L2 is larger than L1, so that the transmission member 140 of the embodiment of the present application realizes different transmission speeds. It can be seen that the transmission member 140 of the embodiment of the present application can correspond to different transmission ratios by moving to different positions in the radial direction of the driving wheel 120, and the transmission ratios of the embodiment of the present application can be varied, but are not limited to the two types shown in the drawings.

Based on the above analysis, the reusable segment 100 of the present application can adjust the transmission ratio between the driving wheel 120 and the driven wheel 130 by changing the transmission radius of the driving wheel 120 to achieve the variable speed control of the transmission member 140, thereby applying different pulling actions to the pulling assembly in the disposable segment 200, so as to adapt to the bending segments with different bending amplitude requirements. Compared with the related art, the reusable segment 100 of the present application can be docked with the disposable segments 200 of different specifications, and the versatility is significantly improved.

In the embodiment of the present application, the type of the driving member 140 may be various, such as a driving belt, a driving chain, etc.

In another specific embodiment, as shown in fig. 4 to 6 and 8, the transmission member 140 may include a plurality of balls 141 and a connection line 142 connecting the plurality of balls 141 in series, and the transmission member 140 is abutted against two wheels through the balls 141.

It should be appreciated that with this structural arrangement, the ball 141 forms a rolling engagement with the abutment surface 1201 of the wheel disc with less frictional resistance than a conventional sliding engagement, which not only reduces the wear area between the structures, but also effectively reduces the difficulty of radial movement of the ball 141 along the drive wheel 120 when the wheel disc abuts the ball 141, thereby facilitating adjustment of the drive radius of the drive wheel 120. This prevents the conventional sliding fit transmission element from being too large in terms of frictional resistance to drive the transmission element smoothly.

In addition, the balls 141 are spherical, and the tapered surface can directly contact with the spherical surface of the balls 141 from the lower side without performing an additional adapting process.

Further, as shown in fig. 9, the wheel disc may include a plurality of sliding grooves 1202 circumferentially arranged on the abutment surface 1201, the sliding grooves 1202 being arranged along a radial extension of the wheel disc, and the balls 141 being slidably engaged with the sliding grooves 1202.

It should be appreciated that, since the driving member 140 is sleeved on the driving wheel 120, the balls 141 thereon are also circumferentially arranged on the driving wheel 120, and the plurality of sliding grooves 1202 are circumferentially arranged to facilitate corresponding engagement with the balls 141. Specifically, the balls 141 and the sliding grooves 1202 can realize positioning fit, so that the balls 141 are limited by the sliding grooves 1202 on the basis of being abutted by the two wheel discs, and therefore slipping between the balls 141 and the abutting surfaces 1201 of the wheel discs can be further prevented, and the transmission member 140 and the driving wheel 120 are ensured to be relatively fixed, so that transmission is smoothly realized.

Meanwhile, the sliding groove 1202 is arranged along the radial extension of the wheel disc, and the adjustment of the transmission radius of the driving wheel 120 is realized through the radial movement of the balls 141 along the driving wheel 120, so that the sliding groove 1202 can conduct guiding constraint on the movement of the balls 141 under the condition that the extension direction of the sliding groove 1202 is consistent with the preset movement direction of the balls 141, so that the balls 141 can be ensured to move along the radial direction all the time to avoid deviating from the preset track, and the reliability of the adjustment of the transmission radius of the driving wheel 120 can be improved.

As shown in fig. 9, the sliding groove 1202 in the embodiment of the application may be an arc sliding groove 1202, so that the sliding groove 1202 can be matched with the spherical surface of the ball 141, and the sliding groove 1202 is in arc line contact with the spherical surface of the ball 141. Of course, embodiments of the present application are not limited to a particular type of runner 1202, and runner 1202 may be a rectangular slot, a triangular slot, etc.

As shown in fig. 9, two wheel discs are each provided with an abutment surface 1201 having a tapered surface, and both abutment surfaces 1201 are provided with a slide groove 1202, however, in an embodiment in which two wheel discs are each provided with an abutment surface 1201 having a tapered surface, only one of the abutment surfaces 1201 may be provided with a slide groove 1202.

In the alternative, as shown in fig. 7, the driven wheel 130 includes a wheel body 131, and a surface of the wheel body 131 that cooperates with the transmission member 140 may be provided with a plurality of recesses 131a, and the balls 141 may be positionally engaged with the recesses 131 a. With such a layout, the concave portion 131a can position the balls 141 to improve the reliability of the cooperation between the balls 141 and the driven wheel 130 and prevent the slippage between the balls 141 and the driven wheel 130, so as to ensure that the transmission member 140 and the driven wheel 130 are kept relatively fixed and smooth transmission is realized.

The recess 131a may be a groove as shown in fig. 7, but the groove may be other structures such as a positioning hole.

As described above, the driving wheel 120 may include only one wheel disc moving in the axial direction thereof, and in particular, two wheel discs of the driving wheel 120 include a first wheel disc 121 and a second wheel disc 122, the driving wheel 120 includes a first wheel axle 123, the first wheel disc 121 is fixedly disposed on the first wheel axle 123, and the second wheel disc 122 is movably disposed in the axial direction of the first wheel axle 123. So arranged, the drive radius of the drive wheel 120 increases under the control of the movement of the second wheel 122 and approaching the first wheel 121; in the case where the second sheave 122 is controlled to move away from the first sheave 121, the transmission radius of the driving wheel 120 decreases.

As shown in fig. 10, the reusable segment 100 may further include a second tuning control 160, the second tuning control 160 being threadably engaged with the first axle 123 and located on a side of the second wheel disc 122 facing away from the first wheel disc 121. It should be understood that the second control 160 and the first axle 123 form a screw mechanism, and when the second control 160 is controlled to rotate relative to the first axle 123, the second control 160 can move along the axial direction of the first axle 123 to approach or separate from the second wheel disc 122. When the second control 160 abuts against the second wheel disc 122 and pushes the second wheel disc 122 towards the first wheel disc 121, the transmission radius of the driving wheel 120 increases; when the second tuning element 160 is far away from the second wheel disc 122, the second wheel disc 122 is not pushed by the second tuning element 160, but there may be a trend of being far away from the first wheel disc 121, so that the transmission radius of the driving wheel 120 may be reduced.

To facilitate operation of the second tuning control 160, the second tuning control 160 may be configured as a knob or the like.

Further, a first linking member may be disposed between the second tuning element 160 and the second wheel 122, so that the second tuning element 160 abuts against the second wheel 122. In the embodiment of the present application, the first engagement member may be of various types, such as a rigid sleeve that is sleeved on the first axle 123.

In addition, as shown in fig. 10, the first connecting member may be a first elastic member 170, and two ends of the first elastic member 170 are respectively connected to the second adjusting member 160 and the second wheel disc 122. Under such a layout, the first elastic member 170 can provide elastic force between the second control member 160 and the second wheel 122, so that a certain buffer margin exists for the driving action of the second control member 160 on the second wheel 122, and damage to the driving wheel 120 and the driving member 140 during the matching due to rigid stress is avoided.

The first elastic member 170 may be sleeved on the first axle 123, and the first axle 123 may guide and constrain the first elastic member 170 to prevent the first elastic member 170 from being skewed and deflected. More specifically, the first resilient member 170 may be selected to be a spring sleeve. The first elastic member 170 may be an elastic foam, rubber, or an elastic polymer structure.

As shown in fig. 12, in the embodiment in which the two wheel discs comprise a first wheel disc 121 and a second wheel disc 122, the driving wheel 120 comprises a first wheel axle 123, the first wheel disc 121 is fixedly arranged on the first wheel axle 123, and the second wheel disc 122 is movably arranged along the axial direction of the first wheel axle 123, a limit key 123a extending along the axial direction of the first wheel axle 123 and the second wheel disc 122 can be arranged at a corresponding region of the first wheel axle 123 and the second wheel disc 122, and the second wheel disc 122 is in limit fit with the limit key 123a along the circumferential direction of the second wheel disc; the reusable section 100 further includes a second adjustment member 160, the second adjustment member 160 having a sleeve portion 161, the sleeve portion 161 being disposed over the first axle 123 and having a peripheral wall threadedly engaged with the housing 110 of the reusable section 100.

It should be understood that, since the limit key 123a is disposed along the axial extension of the first axle 123 and is consistent with the moving direction of the second wheel disc 122, interference of the limit member on the axial movement of the second wheel disc 122 can be avoided, and specifically, the avoidance hole of the second wheel disc 122 penetrating the first axle 123 needs to be provided with a portion corresponding to the limit key 123 a. Meanwhile, since the limiting key 123a can limit the second wheel disc 122 in the circumferential direction of the first wheel axle 123, the second wheel disc 122 and the first wheel axle 123 cannot rotate relatively in the circumferential direction, and when the first wheel axle 123 is rotated through the first control 150, the second wheel disc 122 can be smoothly driven to rotate. Compared with the mode that the second wheel 122 is abutted against the transmission member 140 and the second wheel 122 is driven by the first wheel axle 123, the first wheel 121 and the transmission member 140, the scheme that the second wheel 122 is driven to rotate by the limit key 123a obviously further optimizes the driving reliability.

Since the limit key 123a is disposed on the first axle 123, the sleeve portion 161 is also sleeved on the limit key 123a, and both the limit key 123a and the first axle 123 can rotate in the sleeve portion 161 without interference, so that the first control 150 can be ensured to smoothly control the rotation of the driving wheel 120. The sleeve portion 161 also forms a screw mechanism with the housing 110, and when the second control member 160 is rotated, the sleeve portion 161 can be driven in the axial direction so that the sleeve portion 161 approaches or moves away from the second wheel disc 122. When the sleeve portion 161 abuts against the second wheel 122 and pushes the second wheel 122 toward the first wheel 121, the transmission radius of the driver 120 increases; when the sleeve portion 161 is away from the second sheave 122, the second sheave 122 is not pushed by the sleeve portion 161 and there may be a tendency to move away from the first sheave 121, and the transmission radius of the capstan 120 may be reduced.

It should be noted that the embodiment of the present application is not limited to the specific type of the second tuning control 160, and may alternatively be a linear driving device (such as a linear motor, etc.), which may be directly connected to the second wheel 122 to drive the second wheel 122 to move.

As shown in fig. 6 and 7, in embodiments in which reusable segment 100 includes first dock 180, transmission 140 includes first and second connecting segments 1401 and 1402 between primary and secondary wheels 120 and 130; the reusable segment 100 may further include a first docking rod 181 and a second docking rod 182, the first docking rod 181 having ends respectively coupled to the first connecting segment 1401 and the traction assembly, and the second docking rod 182 having ends respectively coupled to the second connecting segment 1402 and the traction assembly.

With this structural arrangement, the first docking member 180 includes a first docking rod 181 and a second docking rod 182. In the transmission member 140, the transmission directions of the first connecting section 1401 and the second connecting section 1402 are opposite, for example, the first connecting section 1401 is transmitted toward the driven wheel 130, and the second connecting section 1402 is transmitted toward the driving wheel 120; in this case, the transmission member 140 may pull the pulling assembly through the first connecting section 1401 and the first docking rod 181, and may also pull the pulling assembly through the second connecting section 1402 and the second docking rod 182.

It should be noted that the transmission member 140 generally requires a pulling force to be applied to the pulling assembly toward the side of the reusable segment 100 to cause the bending segment to perform the bending action on the pulling side. Specifically, when the transmission member 140 drives the first docking rod 181 to move toward the driving wheel 120, the bending action of the bending section near the side of the first docking rod 181 is achieved; when the transmission member 140 drives the second docking rod 182 to move toward the driving wheel 120, the bending action of the bending section near the side of the second docking rod 182 is achieved.

Further, as shown in fig. 7, the first docking rod 181 and the second docking rod 182 each include a first rod segment 1801 and a second rod segment 1802, the first rod segment 1801 of the first docking rod 181 is connected to the first connection segment 1401, the first rod segment 1801 of the second docking rod 182 is connected to the second connection segment 1402, and the first rod segment 1801 is hinged to the corresponding second rod segment 1802, and the second rod segment 1802 is used to connect the traction assembly.

It should be understood that when the transmission ratio of the driving wheel 120 to the driven wheel 130 is adjusted, the transmission radius of the driving wheel 120 will be changed, and the extending directions of the first connecting section 1401 and the second connecting section 1402 will be changed accordingly, compared with fig. 4, in which the first connecting section 1401 and the second connecting section 1402 in fig. 6 are inclined upward and downward, respectively, so that the first docking rod 181 and the second docking rod 182 will also be inclined accordingly, which causes interference with the housing 110 of the reusable section 100, or even a problem that the second docking member of the disposable section 200 cannot be reliably docked.

In view of the above, the first pole segment 1801 and the second pole segment 1802 of the present embodiment are hinged to each other, the first pole segment 1801 can change the extending direction along with the first connecting segment 1401 and the second connecting segment 1402, and the second pole segment 1802 can maintain the original extending direction by rotating relative to the first pole segment 1801, so that the interference with the housing 110 of the reusable segment 100 is avoided, and the assembling relationship with the second docking member of the disposable segment 200 is not damaged.

In the embodiment of the present application, in order to match the change of the transmission radius of the driving wheel 120, the transmission member 140 may be provided as an elastic structure, and in the case that the transmission radius of the driving wheel 120 is increased, the transmission member 140 is elongated; in the case where the transmission radius of the driving wheel 120 is reduced, the transmission member 140 is rebound to recover the deformation. The structural layout of this embodiment is relatively simple. Of course, embodiments of the present application are not limited by the particular structural layout through which reusable segment 100 is configured to achieve the above-described adaptation.

In an alternative, as shown in fig. 4, 6, 7, 10 and 11, the reusable segment 100 further includes a second elastic member 190, one of the driving wheel 120 and the driven wheel 130 is movably disposed along a first direction, and is connected to the second elastic member 190, and the second elastic member 190 is used to apply a pre-tightening force, where the first direction is an arrangement direction of the driving wheel 120 and the driven wheel 130.

With this structural arrangement, in the driving wheel 120 and the driven wheel 130, one of them can be moved to change the distance from the other, and even if the length of the driving member 140 is constant, the change of the relative positions of the driving wheel 120 and the driven wheel 130 can be adapted to the change of the shape of the driving member 140, so that the damage problem of the driving member, the driving wheel and the driven wheel due to the excessive traction can be avoided.

Specifically, when the transmission radius of the driving wheel 120 is adjusted, the portion of the driving member 140 sleeved on the driving wheel 120 is stretched, and then the driving member 140 pulls the driving wheel 120 and the driven wheel 130 to approach each other, or the portion of the driving member 140 sleeved on the driving wheel 120 is contracted, and then the driving wheel 120 and the driven wheel 130 are separated from each other to meet the requirement of tensioning the driving member 140.

At the same time, the second elastic member 190 may provide a pre-tightening force to always tighten the transmission member 140, thereby ensuring that the transmission member 140 reliably and stably performs a transmission function. Specifically, in the process of adjusting the increase of the transmission radius of the driving wheel 120, the driving member 140 pulls the driving wheel 120 and the driven wheel 130 to approach each other, the second elastic member 190 deforms to store energy, and applies a pre-tightening force to the movable one of the driving wheel 120 and the driven wheel 130, so that the movable one has a tendency of resetting. During the process of reducing the transmission radius of the adjustment driving wheel 120, the transmission member 140 no longer pulls the driving wheel 120 and the driven wheel 130 toward each other, at this time, the second elastic member 190 can release energy by restoring the deformation, so as to drive the movable one of the driving wheel 120 and the driven wheel 130 to move for resetting, and always tension the transmission member 140.

Optionally, considering that there is a need for a structural layout of the driving wheel 120 that needs to drive the driving wheel 120 to rotate and drive the wheel disc to move, the embodiment of the present application may configure the driven wheel 130 to be movably disposed along the first direction, so that the structural complexity of the reusable section 100 on one side of the driving wheel 120 can be reduced to a certain extent. Of course, the reusable segment 100 of an embodiment of the present application may also configure the drive wheel 120 to be movably disposed along the first direction.

For convenience of the following description, a scheme in which the driven wheel 130 is movably disposed along the first direction will be taken as an example.

Embodiments of the present application are not limited to a particular type of pre-load force applied by the second resilient member 190. Wherein the second elastic member 190 may apply a pushing force as a pre-tightening force to the driven wheel 130, in which case it is necessary to arrange the second elastic member 190 to push the driven wheel 130 in a compressed state; the second elastic member 190 may also apply a pulling force as a pre-tightening force to the driven wheel 130, in which case it is necessary to arrange the second elastic member 190 to pull the driven wheel 130 in a stretched state.

In addition, reusable segment 100 of embodiments of the present application may be configured with additional elastic members to enhance the pretensioning action on driven wheel 130. For example, in the case where the second elastic member 190 applies a pushing force to the driven wheel 130, the additional elastic member applies a pulling force to the driven wheel 130 at the other side of the driven wheel 130.

As shown in fig. 6, 7, 10 and 11, the driven wheel 130 includes a wheel body 131 and a second axle 132, and the wheel body 131 is rotatably sleeved on the second axle 132. In order to facilitate the transmission member 140 to be sleeved on the wheel body 131, the second elastic member 190 may be connected to the second axle 132, and apply a pre-tightening force to the second axle 132, so as to generate a pre-tightening effect on the whole driven wheel 130, so that interference between the second elastic member 190 and the transmission member 140 can be avoided as much as possible. Of course, the embodiment of the present application does not limit the specific matching relationship of the second elastic member 190, because the transmission stroke of the transmission member 140 is smaller, the second elastic member 190 may be configured to be connected to the wheel body 131, and directly apply the pre-tightening force to the wheel body 131.

Meanwhile, the reusable section 100 includes a housing 110, and the housing 110 may be provided with a guide space 1101 extending in the first direction, and the second axle 132 is slidably fitted in the guide space 1101. It should be understood that, the extending direction of the guiding space 1101 determines the moving direction of the second axle 132 and the driven wheel 130, and since the guiding space 1101 is arranged along the first direction, it is ensured that the moving direction of the driven wheel 130 is consistent with the arrangement direction of the driving wheel 120 and the driven wheel 130, so that a guiding effect along the preset direction is generated on the driven wheel 130, and an unexpected friction resistance caused by the movement of the second axle 132 along the direction deviating from the first direction is avoided.

In the embodiment of the present application, the guiding space 1101 may be a groove structure, and the groove bottom may exert a supporting effect on the second axle 132, so that the installation stability of the driven wheel 130 may be optimized. The second elastic member 190 may be selected from a spring, an elastic foam, rubber, an elastic polymer structure, and the like.

As shown in fig. 4, 6, 7, 10 and 11, the housing 110 may include a guide seat 111 disposed in an inner cavity thereof, where the guide seat 111 has two flanges 111a disposed opposite to each other, and a guide space 1101 is defined between the two flanges 111 a; the second wheel axle 132 is provided with a sliding block 132a, and the second wheel axle 132 is in sliding clamping fit with the two flanges 111a through the sliding block 132 a.

Under such a structural layout, the guide holder 111 can be manufactured as an independent component, and compared with the corresponding matching structure which is directly manufactured on the housing 110, the processing difficulty is smaller, and the guide holder 111 can be independently assembled with the second wheel, and assembled on the inner wall of the housing 110 after the assembly is completed, thereby improving the convenience of assembling the second wheel axle 132 movably arranged on the housing 110.

The two flanges 111a may act as a constraint on opposite sides of the second axle 132 to ensure that the second axle 132 moves smoothly within the guide space 1101. Meanwhile, since the sliding block 132a is in clamping fit with the two flanges 111a, which is equivalent to being embedded in the two flanges 111a, the sliding block 132a and the flanges 111a mutually generate limit, so that the second wheel axle 132 can be prevented from being separated from the guide space 1101, and the installation reliability of the driven wheel 130 is optimized. Since the slide 132a is in a sliding fit in the two flanges 111a, this also ensures that the second wheel axle 132 is moved smoothly in the guide space 1101.

Further, as shown in fig. 10 and 11, the guide seat 111 includes a guide groove 111b disposed in the flange 111a, the guide groove 111b communicates with the guide space 1101 and is disposed to extend along the first direction, the slider 132a has two sliding portions 132a1 disposed opposite to each other, and the sliding portions 132a1 are in one-to-one sliding fit with the guide groove 111 b.

Specifically, the guide groove 111b plays a guiding role on the sliding portion 132a1, and by configuring it to extend along the first direction, the sliding portion 132a1 and the slider 132a can be guided to move along the preset direction, so as to ensure that the second axle 132 smoothly moves in the guiding space 1101. The sliding portions 132a1 are disposed at two opposite ends of the sliding block 132a, so that two sliding support points distributed relatively can be formed on the sliding portion 132a1, which is beneficial to improving the sliding reliability and stability of the sliding block 132 a.

Optionally, the sliding portion 132a1 may be slidably engaged with the guide groove 111b, and the guide groove 111b may play a limiting role on the sliding portion 132a1, so that the stability of the second axle 132 engaged in the guide space 1101 may be further avoided, and the installation reliability of the driven wheel 130 is optimized.

In order to further improve the compactness, as shown in fig. 10 and 11, the second elastic member 190 is disposed in the guide groove 111b, and both ends of the second elastic member 190 are respectively connected to the sliding portion 132a1 and the guide holder 111. With this arrangement, the second elastic member 190 applies a biasing force to the sliding portion 132a1, and indirectly applies a biasing force to the driven wheel 130 as a whole via the slider 132 a. The second elastic member 190 multiplexes the space in the guide groove 111b, and the space utilization and the compactness of the reusable part 100 can be improved as compared with the case where the second elastic member 190 is disposed in the inner cavity of the housing 110. Meanwhile, since the second elastic member 190 is disposed in the guide groove 111b, the groove wall of the guide groove 111b surrounds the second elastic member 190 to perform a constraint guiding function on the second elastic member 190, which can prevent the second elastic member 190 from deflecting, twisting, and the like, thereby ensuring that the second elastic member 190 applies a pre-tightening force along a preset direction.

In addition, since the two sliding portions 132a1 are disposed at opposite ends of the sliding block 132a, and the second elastic member 190 transmits the pre-tightening force through the two sliding portions 132a1, and combines with the sliding fit relationship of the second axle 132 in the guiding space 1101, 3 parallel guiding rail mechanisms are formed between the second axle 132 and the guiding seat 111, so that the pre-tightening effect of the sliding block 132a, the second axle 132 and the driven wheel 130 can be more balanced, and the driven wheel 130 is prevented from being biased, so as to ensure that the driven wheel 130 moves along the preset direction and is pre-tightened at the preset position.

Optionally, as shown in fig. 11, the slider 132a may be disposed at an end of the second axle 132, so as to facilitate the molding process of the slider 132a on the second axle 132, and facilitate the assembly of the second axle 132 with the guide seat 111 and the housing 110. Of course, the slider 132a may be provided at a portion between the end of the second wheel axle 132 and the corresponding region of the wheel body 131.

Alternatively, two guide spaces 1101 are provided, the two guide spaces 1101 are disposed opposite to each other, and two ends of the second axle 132 are respectively slidably engaged in the two guide spaces 1101. It should be appreciated that with this arrangement, both ends of the second axle 132 are guided by the guiding space 1101, that is, the second axle 132 is provided with a relatively distributed sliding supporting function, so that the problems of deflection and wear caused by sliding engagement on one side can be avoided, thereby ensuring that the second axle 132 reliably and smoothly moves along the preset direction.

Alternatively, as shown in fig. 10 and 11, the reusable segment 100 may include an adapter 1100 and a latch 1110, the adapter 1100 having a first end coupled to the second axle 132 and a second end extending outside of the housing 110, the latch 1110 threadably engaging the second end of the adapter 1100.

It should be appreciated that the locking member 1110 and the adapter 1100 form a screw mechanism, and that in the event of rotation of the locking member 1110 relative to the adapter 1100, the locking member 1110 is axially movable against the housing 110, thereby effecting locking by frictional resistance with the housing 110. The adapter 1100 serves as an intermediate adapter structure between the locking member 1110 and the second axle 132, which can transmit the locking action of the locking member 1110 to the second axle 132, and when the locking member 1110 is locked to the housing 110, the second axle 132 and thus the driven wheel 130 cannot move in the first direction, so that the transmission ratio between the driving wheel 120 and the driven wheel 130 cannot be adjusted until the locking member 1110 is released (i.e., the locking member 1110 is unlocked from the housing 110).

As shown in fig. 1 and 2, in embodiments in which the reusable segment 100 includes an engagement sheath 1120, the latch 1110 may be latched to an outer wall of the engagement sheath 1120.

As shown in fig. 1 to 3, based on the reusable section 100, the embodiment of the present application further provides an operation handle, which includes a disposable section 200 and the reusable section 100 according to any of the foregoing schemes, so that the operation handle has the beneficial effects of any of the foregoing schemes, which are not described herein again.

Wherein the reusable segment 100 is detachably connected to the disposable segment 200, and when applied to different types of endoscopes, the disposable segment 200 of different specifications can be adapted and replaced by using the same reusable segment 100.

As shown in fig. 1 to 3, based on the foregoing operation handle, the embodiment of the present application further provides an endoscope, which includes the foregoing operation handle, so that the endoscope has the beneficial effects of any one of the foregoing schemes, which is not described herein again.

The endoscope of the embodiment of the application can be a gastroscope, a enteroscope, a laryngoscope, a fiberbronchoscope and the like, and the embodiment of the application does not limit the type of the endoscope.

The foregoing embodiments of the present application mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in view of brevity of line text, no further description is provided herein.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims

1. An operating handle for an endoscope, characterized in that the operating handle comprises a disposable section and a reusable section, the reusable section being detachably connected to the disposable section to dock the disposable sections of different specifications through the same reusable section;

The reusable section comprises a driving wheel, a driven wheel, a transmission piece and a first butt joint piece connected with the transmission piece, and the disposable section comprises a traction assembly and a second butt joint piece connected with the traction assembly, wherein:

The driving wheel comprises two wheel discs which are oppositely arranged along the axial direction of the driving wheel, and at least one of the two wheel discs is movably arranged along the axial direction of the driving wheel so as to be close to or far away from the other wheel, so that the transmission ratio between the driving wheel and the driven wheel is adjusted by changing the transmission radius of the driving wheel;

The transmission piece is sleeved on the driving wheel and the driven wheel, is propped against and fixed between the two wheel discs, and can rotate along with the driving wheel to be transmitted;

at least one abutting surface of the wheel disc, which abuts against the transmission piece, is a conical surface;

with the reusable section connected to the disposable section, the first docking member is in docking engagement with the second docking member to drive the pulling assembly via the transmission member to pull the curved section of the insertion portion of the endoscope;

The transmission piece comprises a plurality of balls and a connecting line for connecting the balls in series, and the transmission piece is abutted with the two wheel discs through the balls.

2. The operating handle of claim 1, wherein the wheel disc includes a plurality of runners circumferentially arranged in the abutment surface, the runners being arranged in a radial extension of the wheel disc, the balls being slidably engageable with the runners.

3. The operating handle of claim 1, wherein the driven wheel comprises a wheel body, a surface of the wheel body that mates with the driving member is provided with a plurality of recesses, and the balls are positioned to mate with the recesses.

4. The operating handle according to claim 1, wherein the two wheel discs comprise a first wheel disc and a second wheel disc, the driving wheel comprises a first wheel shaft, the first wheel disc is fixedly arranged on the first wheel shaft, and the second wheel disc is movably arranged along the axial direction of the first wheel shaft;

The reusable segment further comprises a second adjusting part and a first elastic part, the second adjusting part is in threaded fit with the first wheel shaft and is located on one side, away from the first wheel disc, of the second wheel disc, and two ends of the first elastic part are connected with the second adjusting part and the second wheel disc respectively.

5. The operating handle according to claim 1, wherein the two wheel discs comprise a first wheel disc and a second wheel disc, the driving wheel comprises a first wheel shaft, the first wheel disc is fixedly arranged on the first wheel shaft, and the second wheel disc is movably arranged along the axial direction of the first wheel shaft;

a limiting key extending along the axial direction of the first wheel shaft is arranged in a region corresponding to the second wheel disc, and the second wheel disc is in limiting fit with the limiting key in the circumferential direction of the second wheel disc; the reusable section further comprises a second regulating part, the second regulating part is provided with a sleeve part, the sleeve part is sleeved on the first wheel shaft, and the peripheral wall of the sleeve part is in threaded fit with the shell of the reusable section.

6. The operating handle of claim 1, wherein the transmission includes a first connection section and a second connection section between the drive wheel and the driven wheel; the reusable section further comprises a first butt joint rod and a second butt joint rod, two ends of the first butt joint rod are respectively connected with the first connecting section and the traction assembly, and two ends of the second butt joint rod are respectively connected with the second connecting section and the traction assembly.

7. The operating handle of claim 6, wherein the first and second docking rods each comprise a first rod segment and a second rod segment, the first rod segment of the first docking rod being connected to the first connection segment, the first rod segment of the second docking rod being connected to the second connection segment, and the first rod segment being hinged to the corresponding second rod segment, the second rod segment being for connecting the traction assembly.

8. An endoscope comprising the operating handle according to any one of claims 1 to 7.