CN218572163U

CN218572163U - Reusable segment, operating handle and endoscope

Info

Publication number: CN218572163U
Application number: CN202222179944.2U
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: 2023-03-07
Anticipated expiration: 2032-08-18

Abstract

The application discloses a reusable section, an operating handle and an endoscope. The repeatedly usable section includes the action wheel, follows driving wheel, driving medium and first elastic component, 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 can be movably arranged along the axial direction of the driving wheel so as to be close to or far away from the other wheel disc; the driving member is sleeved on the driving wheel and the driven wheel and is propped against and fixed between the two wheel discs, and the driving member can rotate along with the driving wheel to drive the traction assembly of the disposable section of the operating handle; the butting surface of at least one wheel disc, which is butted with the transmission piece, is a conical surface; one of the driving wheel and the driven wheel is movably arranged along a first direction and is connected with a first elastic piece, the first elastic piece is used for applying pretightening force, and the first direction is the arrangement direction of the driving wheel and the driven wheel. Above-mentioned scheme can avoid transmission assembly impaired.

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

With the advancement of endoscope technology, the operating handle of the endoscope is designed to comprise a reusable section and a disposable section, and after the endoscope is used, only the disposable section needs to be discarded, and the reusable section is reserved, so that not only can cross infection be avoided, but also the discarding cost can be reduced.

In the related art, the reusable segment may include a speed change assembly composed of a transmission wheel and a transmission belt, and transmission speed change is realized by changing the transmission radius of the transmission wheel so as to adapt to the disposable segments of different specifications. However, in the process of changing the transmission radius of the transmission wheel, the shape of the transmission belt changes, so that a large pulling force is generated between the transmission belt and the driving wheel and between the transmission belt and the driven wheel, and the transmission assembly is damaged.

SUMMERY OF THE UTILITY MODEL

The application discloses repeatedly usable section, operating handle and endoscope can avoid transmission assembly impaired.

In order to solve the above problems, the following technical solutions are adopted in the present application:

in a first aspect, the present application provides a reusable section for use with an operating handle of an endoscope. The reusable section comprises a driving wheel, a driven wheel, a transmission part and a first elastic part, 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 disc;

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

the butting surface of at least one wheel disc, which is butted with the transmission piece, is a conical surface;

one of the driving wheel and the driven wheel is movably arranged along a first direction and is connected with the first elastic piece, the first elastic piece is used for applying pretightening force, and the first direction is the arrangement direction of the driving wheel and the driven wheel.

In a second aspect, the present application provides an operating handle comprising a disposable section and a reusable section as described in the first aspect of the present application, the reusable section being detachably connectable to the disposable section.

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, one of the driving wheel and the driven wheel can be movably arranged, so that the change of the relative position of the driving wheel and the driven wheel adapts to the change of the shape of the transmission part when the transmission radius of the driving wheel is adjusted, and the problem of damage caused by excessive traction among the transmission part, the driving wheel and the driven wheel can be avoided. Simultaneously, first elastic component can provide the pretightning force to tensioning driving medium all the time, thereby ensure that the driving medium reliably realizes the transmission effect steadily.

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 application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

In the drawings:

FIG. 1 is a schematic structural diagram of an endoscope disclosed in an embodiment of the present application;

FIG. 2 is an exploded view of an endoscope as disclosed in an embodiment of the present application;

FIG. 3 is a schematic view of an endoscope from another perspective as disclosed in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a reusable segment disclosed in an embodiment of the present application before a gear ratio change;

FIG. 5 is a schematic diagram of a transmission principle of the reusable part before a transmission ratio is changed according to an embodiment of the present application;

FIG. 6 is a schematic illustration of a reusable section after a gear ratio change in accordance with an embodiment of the present disclosure;

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

FIG. 8 is a schematic illustration of the transmission principle of the reusable part after a gear ratio change according to the embodiment of the present application;

FIG. 9 is a partially enlarged view taken about B in FIG. 8;

FIG. 10 is an exploded view of the reusable section disclosed in an embodiment of the present application;

FIG. 11 is a partially enlarged view taken at C in FIG. 10;

fig. 12 is a schematic structural view of another reusable-section shell with a hidden part, disclosed in the embodiments of the present application.

Description of reference numerals:

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 shaft, 123 a-limit key, 1201-abutting surface, 1202-chute,

130-driven wheel, 131-wheel body, 131 a-recess, 132-second wheel shaft, 132 a-slide, 132a 1-slide,

140-transmission piece, 141-ball, 142-connecting line, 1401-first connecting segment, 1402-second connecting segment,

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

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

190-first elastic member, 1100-adaptor, 1110-latch, 1120-engagement sheath,

200-disposable segment.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

In order to solve the technical problem that the speed changing assembly of the reusable section is easy to damage in the related art, the embodiment of the application provides the reusable section which is applied to an operating handle of an endoscope.

Referring to fig. 1 to 12, a reusable segment 100 disclosed in the present embodiment includes a driving wheel 120, a driven wheel 130, a transmission member 140, and a first elastic member 190. Of course, the reusable section 100 of the present embodiment also includes a housing 110.

The housing 110 is the base component of the reusable segment 100, which provides a mounting base for other components and also serves a protective function to some extent. Specifically, the driving wheel 120, the driven wheel 130, the transmission member 140 and other components are disposed in the housing 110.

The driving member 140 is sleeved on the driving wheel 120 and the driven wheel 130, and the driving member 140 can rotate along with the driving wheel 120 to drive the traction component of the disposable section 200 of the operating handle. It should be understood that when the user controls the driving wheel 120 to rotate, the transmission member 140 can transmit the driving wheel 120 and the driven wheel 130; after docking assembly of reusable segment 100 with disposable segment 200, a connection is established between transmission member 140 in reusable segment 100 and the traction assembly in disposable segment 200, which traction assembly is pulled by transmission member 140 when it is transmitting, thereby pulling the bending section in the insertion portion of the endoscope through the traction assembly. Illustratively, where the curved segment is a serpentine solution, the distraction assembly is used to distract the serpentine thereby effecting a bending action of the curved segment.

As shown in fig. 3 and 10, the reusable section 100 may include a first adjusting and controlling element 150, the first adjusting and controlling element 150 is connected to the driving wheel 120, and may be specifically connected to the first axle 123 of the driving wheel 120, and when the first adjusting and controlling element 150 is rotated, the first adjusting and controlling element 150 may drive the first axle 123 to control the driving wheel 120 to rotate. The first adjusting member 150 may be a lever, a handle, or the like.

The pulling assembly typically comprises a pulling cord, and in embodiments where there are multiple pulling cords, the bending section can be pulled to bend towards the side by pulling on the pulling cord on the different side, thereby causing the insertion portion of the endoscope to bend in different directions.

Reusable segment 100 may include a first docking member 180 connected to drive member 140, disposable segment 200 may include a second docking member connected to the traction assembly, and reusable segment 100 and disposable segment 200 may be docked by mating first docking member 180 and second docking member to establish a connection between drive member 140 and the traction assembly.

Alternatively, as shown in fig. 1-3, the reusable part 100 may include an engaging sheath 1120, the engaging sheath 1120 is used to connect the housing 110 of the reusable part 100 and the disposable part 200, and is sleeved on the outer periphery of the first docking member 180 and/or the second docking member for protection, and at the same time, the engaging sheath 1120 can prevent the above docking structure from being exposed, so as to further enhance the aesthetic property of the operating handle.

In the present embodiment, the driver 120 includes two disks disposed oppositely in the axial direction thereof, and of the two disks, at least one is movably disposed in the axial direction of the driver 120 so as to be close to or away from the other. In particular, the driver 120 comprises a first axle 123, the wheel disc being movable in axial direction of the driver 120 by being movable along the first axle 123. In the case that only one wheel disc is movably arranged, the distance between the two wheel discs can be adjusted by moving the wheel disc; under the condition that both the two wheel discs can be movably arranged, the distance between the two wheel discs can be adjusted by simultaneously moving the two wheel discs.

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

Due to the arrangement of the abutting surface 1201 which is a conical surface, when the two discs are close to each other, there will be a component of the reaction force applied by the conical surface to the transmission member 140 in the radial direction of the driver 120 based on newton's third law, which will drive the transmission member 140 to move in the radial direction of the driver 120, thereby increasing the transmission radius of the driver 120. Under the condition that two rim plates are kept away from each other mutually, the rim plate that moves then no longer possesses the effect of propping up driving medium 140 through the conical surface, and the interval between two rim plates increases, then driving medium 140 can be along the radial inward movement realization that drives wheel 120 resets of the surperficial orbit of conical surface to the transmission radius of drive wheel 120 has been reduced.

In the embodiment in which the abutment surfaces 1201 of the two discs are conical surfaces, the force applied to the transmission member on opposite sides of the transmission member is more balanced, thereby optimizing the stability of the transmission member during transmission and movement in the radial direction of the driver 120.

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

Next, the operation principle of the reusable stage 100 of the embodiment of the present application will be specifically explained with the embodiments shown in fig. 4 to 6 and 8.

As shown in fig. 4 and 5, the first connection section 1401 and the second connection section 1402 of the transmission member 140 between the driving wheel 120 and the driven wheel 130 are substantially parallel, which indicates that the transmission radii of the driving wheel 120 and the driven wheel 130 are substantially equal, in this case, the angular velocities 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 at this time is set to be r1, and when the rotation angle a of the driving wheel 120 is controlled by the first adjusting and controlling component 150, the transmission distance of the transmission component 140 is L1.

As shown in fig. 6 and 8, by controlling the wheel discs to move toward each other to make the two wheel discs approach each other, the transmission member 140 moves outward along the axial direction of the driving wheel 120 under the abutting action of the tapered surfaces, so that the transmission radius of the driving wheel 120 can be increased. 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. When the driving wheel 120 is controlled to rotate by the same angle a by the first adjusting and controlling component 150, the driving radius of the driving wheel 120 is set to r2, and the driving distance of the driving component 140 is set to L2.

As can be seen, the transmission radius r2 is greater 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, which indicates that the transmission distance L2 is greater 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 present embodiment moves to different positions in the radial direction of the driving wheel 120 to correspond to different transmission ratios, and the transmission ratios of the present embodiment may be various, and are not limited to the two types shown in the drawings.

Based on the above analysis, the reusable section 100 of the present embodiment 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 section 200 to adapt to the bending sections with different bending amplitude requirements. Compared with the related art, the reusable segment 100 of the embodiment of the present application can be connected to the disposable segments 200 of different specifications, and the versatility thereof is significantly improved.

In the embodiment of the present application, one of the driving wheel 120 and the driven wheel 130 is movably disposed along a first direction, and is connected to the first elastic element 190, the first elastic element 190 is used for applying a pre-tightening force, and the first direction is an arrangement direction of the driving wheel 120 and the driven wheel 130.

With such a configuration, 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 transmission member 140 is constant, the change of the relative position of the driving wheel 120 and the driven wheel 130 can be adapted to the change of the shape of the transmission member 140, so that the problem of damage caused by over-pulling between the transmission member, the driving wheel and the driven wheel can be avoided.

Specifically, when the transmission radius of the driving wheel 120 is adjusted, the portion of the transmission member 140 sleeved on the driving wheel 120 is expanded, the transmission member 140 pulls the driving wheel 120 and the driven wheel 130 to approach each other, or the portion of the transmission member 140 sleeved on the driving wheel 120 contracts, so that the driving wheel 120 and the driven wheel 130 are away from each other to meet the requirement of tensioning the transmission member 140.

Meanwhile, the first elastic element 190 can provide a pre-tightening force to always tension the transmission element 140, thereby ensuring that the transmission element 140 can reliably and stably realize a transmission function. Specifically, in the process of adjusting the transmission radius of the driving wheel 120 to increase, the transmission member 140 pulls the driving wheel 120 and the driven wheel 130 to approach each other, the first 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 returning. During the process of adjusting the reduction of the transmission radius of the driving wheel 120, the transmission member 140 no longer pulls the driving wheel 120 and the driven wheel 130 to approach each other, and at this time, the first elastic member 190 can release energy by restoring the deformation to drive the movable one of the driving wheel 120 and the driven wheel 130 to move and reset, and always tension the transmission member 140.

Optionally, considering that the driving wheel 120 still has a requirement of a structural layout that the driving wheel 120 needs to be driven to rotate and the driving wheel disc needs to move, the driven wheel 130 may be configured to be movably disposed along the first direction in the embodiment of the present application, so that the structural complexity of the reusable section 100 on one side of the driving wheel 120 may be reduced to some extent. Of course, the reusable section 100 of the present embodiment can also be configured with the driving wheel 120 movably disposed along the first direction.

For the sake of convenience in the following description, the driven wheel 130 is movably disposed along the first direction.

The embodiment of the present application is not limited to a specific type of the pretightening force applied by the first elastic member 190. The first elastic element 190 can apply a pushing force as a pre-tightening force to the driven wheel 130, in which case the first elastic element 190 needs to be arranged to push the driven wheel 130 in a compressed state; the first elastic member 190 can also apply a tension force as a pre-tension force to the driven wheel 130, in which case the first elastic member 190 needs to be arranged to pull the driven wheel 130 in a stretching state.

In addition, the reusable section 100 of the present embodiment may also be configured with additional resilient members to enhance the pretensioning action against the driven wheel 130. For example, in the case where the first 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 wheel shaft 132, and the wheel body 131 is rotatably sleeved on the second wheel shaft 132. In order to facilitate the transmission member 140 to be sleeved on the wheel body 131, the first 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, thereby avoiding interference between the first elastic member 190 and the transmission member 140 as much as possible. Of course, the embodiment of the present application does not limit the specific matching relationship of the first elastic element 190, because the transmission stroke of the transmission element 140 is relatively small, the first elastic element 190 can also be configured to be connected to the wheel body 131 to directly apply the pre-tightening force to the wheel body 131.

Meanwhile, the reusable segment 100 includes a housing 110, and the housing 110 may be provided with a guide space 1101 arranged to extend in the first direction, and the second axle 132 is slidably fitted to the guide space 1101. It should be understood that the extending direction of the guiding space 1101 determines the moving direction of the second wheel shaft 132 and the driven wheel 130, and since the guiding space 1101 extends 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 as to generate a guiding effect on the driven wheel 130 along a preset direction, and avoid the second wheel shaft 132 from moving along a direction deviating from the first direction to generate an unexpected frictional resistance.

In the embodiment of the present application, the guiding space 1101 may be a groove structure, and the groove bottom thereof may support the second axle 132, so as to optimize the installation stability of the driven wheel 130. The first elastic member 190 may be a spring, elastic foam, rubber, elastic polymer structure, or 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, the guide seat 111 having two oppositely disposed flanges 111a, the two flanges 111a defining a guide space 1101 therebetween; the second axle 132 is provided with a slide block 132a, and the second axle 132 is in sliding snap fit with the two flanges 111a through the slide block 132 a.

Under the structural layout, the guide seat 111 can be processed as an independent component, and compared with a corresponding matching structure directly processed on the housing 110, the processing difficulty is smaller, and the guide seat 111 can be independently assembled with the second wheel, and after the assembly is finished, the guide seat is assembled on the inner wall of the housing 110, so that the assembly convenience of the movable arrangement of the second wheel shaft 132 on the housing 110 can be improved.

The two flanges 111a may serve as a restraint on opposite sides of the second axle 132 to ensure smooth movement of the second axle 132 within the guide space 1101. Meanwhile, the sliding block 132a is in clamping fit with the two flanges 111a and is equivalently embedded in the two flanges 111a, and the sliding block 132a and the flanges 111a are limited mutually, so that the second wheel shaft 132 can be prevented from being separated from the guide space 1101, and the mounting reliability of the driven wheel 130 is optimized. Since the sliding blocks 132a are slidably fitted in the two flanges 111a, it is also ensured that the second wheel axle 132 can smoothly move in the guide space 1101.

Further, as shown in fig. 10 and 11, the guide seat 111 includes a guide groove 111b provided in the flange 111a, the guide groove 111b is communicated with the guide space 1101 and is arranged to extend in the first direction, the slider 132a has two sliding portions 132a1 arranged oppositely, and the sliding portions 132a1 are in one-to-one sliding fit with the guide groove 111 b.

Specifically, the guide groove 111b guides the sliding portion 132a1, and by configuring the arrangement of extending the sliding portion 132a1 along the first direction, the sliding portion 132a1 and the slider 132a can be guided to move along the predetermined direction, so as to ensure that the second wheel axle 132 can move smoothly in the guide space 1101. The opposite ends of the sliding block 132a are provided with the sliding portions 132a1, so that two sliding support points which are distributed oppositely can be formed on the sliding portions 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 and snap-fitted with the guide groove 111b, and the guide groove 111b may limit the sliding portion 132a1, so as to further avoid the fitting stability of the second axle 132 in the guide space 1101, and optimize the installation reliability of the driven wheel 130.

In order to further improve the compactness, as shown in fig. 10 and 11, the first elastic member 190 is disposed in the guide groove 111b, and both ends of the first elastic member 190 are connected to the sliding portion 132a1 and the guide holder 111, respectively. In this arrangement, the first elastic member 190 applies a biasing force to the sliding portion 132a1, and indirectly applies a biasing force to the entire driven wheel 130 through the slider 132 a. The first elastic member 190 reuses the space in the guiding groove 111b, and obviously improves the space utilization and the structural compactness inside the reusable segment 100 compared with the case where the first elastic member 190 is disposed in the inner cavity of the housing 110. Meanwhile, as the first elastic element 190 is arranged in the guide groove 111b, the groove wall of the guide groove 111b surrounds the first elastic element 190 and can play a role in restraining and guiding the first elastic element 190, which can prevent the first elastic element 190 from deflecting, twisting and the like, thereby ensuring that the first elastic element 190 exerts pretightening force along the preset direction.

In addition, since the two sliding portions 132a1 are disposed at opposite ends of the sliding block 132a, and the first elastic element 190 transmits a pre-tightening force through the two sliding portions 132a1, in combination with the sliding fit relationship of the second axle 132 in the guiding space 1101, 3 parallel guide rail mechanisms are formed between the second axle 132 and the guiding seat 111, so that the pre-tightening effects on the sliding block 132a, the second axle 132, and even the driven wheel 130 can be more balanced, thereby preventing the driven wheel 130 from being biased by a force, so as to ensure that the driven wheel 130 moves along a preset direction and achieves pre-tightening at a preset position.

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

In an alternative scheme, the number of the guide spaces 1101 is two, the two guide spaces 1101 are arranged oppositely, and two ends of the second axle 132 are respectively in sliding fit in the two guide spaces 1101. It should be understood that, in this arrangement, both ends of the second axle 132 are guided and constrained by the guide space 1101, that is, the second axle 132 is provided with relatively distributed sliding support, so that the problems of deflection and abrasion caused by single-side sliding fit can be avoided, and thus the second axle 132 can be ensured to move reliably and smoothly along the preset direction.

In an alternative arrangement, as shown in fig. 10 and 11, the reusable section 100 can include an adaptor 1100 and a locking member 1110, the adaptor 1100 having a first end connected to the second axle 132 and a second end extending beyond the housing 110, the locking member 1110 threadably engaging the second end of the adaptor 1100.

It should be understood that the locking member 1110 and the adapter 1100 form a lead screw mechanism, and when the locking member 1110 rotates relative to the adapter 1100, the locking member 1110 can move axially to abut against the housing 110, so that the locking is achieved by frictional resistance with the housing 110. The adapter 1100 serves as an intermediate adapter structure between the locking member 1110 and the second wheel axle 132, and can transmit the locking action of the locking member 1110 to the second wheel axle 132, and when the locking member 1110 is locked to the housing 110, the second wheel axle 132 and even 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 released from being locked to the housing 110).

As shown in fig. 1 and 2, in embodiments where the reusable section 100 includes an engagement sheath 1120, the locking member 1110 can lock to the outer wall of the engagement sheath 1120.

As mentioned above, the driver 120 may only include one wheel disc moving along the axial direction thereof, specifically, the two wheel discs of the driver 120 include the first wheel disc 121 and the second wheel disc 122, the driver 120 includes the 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. With such an arrangement, in the case of controlling the second wheel 122 to move and approach the first wheel 121, the transmission radius of the driver 120 is increased; in the case of controlling the second disc 122 to move away from the first disc 121, the transmission radius of the driver 120 is reduced.

As shown in fig. 10, the reusable segment 100 may further include a second adjustment member 160, the second adjustment member 160 being threadedly engaged with the first axle 123 and located on a side of the second wheel 122 facing away from the first wheel 121. It should be understood that the second adjustment member 160 and the first wheel axle 123 form a screw mechanism, and when the second adjustment member 160 is controlled to rotate relative to the first wheel axle 123, the second adjustment member 160 can move along the axial direction of the first wheel axle 123 to approach or separate from the second wheel disc 122. Under the condition that the second adjusting member 160 abuts against the second wheel disc 122 and pushes the second wheel disc 122 toward the first wheel disc 121, the transmission radius of the driver 120 is increased; when the second adjusting member 160 is far away from the second wheel 122, the second wheel 122 may not be pushed by the second adjusting member 160 and may have a tendency of being far away from the first wheel 121, and the transmission radius of the driving wheel 120 may be reduced.

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

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

In addition, as shown in fig. 10, the first connecting member may be a second elastic member 170, and both ends of the second elastic member 170 are connected to the second adjusting member 160 and the second wheel 122, respectively. With such a layout, the second elastic element 170 can provide an elastic force between the second adjusting element 160 and the second wheel disc 122, so that a certain buffer space exists for the driving action of the second adjusting element 160 on the second wheel disc 122, and the driving wheel 120 and the transmission element 140 are prevented from being damaged when being matched due to rigid stress.

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

As shown in fig. 12, in an embodiment where the two discs include a first disc 121 and a second disc 122, the driver 120 includes a first wheel axle 123, the first disc 121 is fixedly disposed on the first wheel axle 123, and the second disc 122 is movably disposed along an axial direction of the first wheel axle 123, a region of the first wheel axle 123 corresponding to the second disc 122 may be provided with a limit key 123a extending along the axial direction thereof, and the second disc 122 is in limit fit with the limit key 123a in a circumferential direction thereof; the reusable part 100 further includes a second adjusting member 160, the second adjusting member 160 has a sleeve portion 161, the sleeve portion 161 is sleeved on the first axle 123, and the outer peripheral wall of the sleeve portion is in threaded engagement with the housing 110.

It should be understood that, since the limiting key 123a is disposed along the axial extension of the first axle 123 and the moving direction of the limiting key is the same as the moving direction of the second wheel disc 122, the interference of the limiting element on the axial movement of the second wheel disc 122 can be avoided, and specifically, the avoiding hole penetrating through the first axle 123 on the second wheel disc 122 needs to be provided with a portion corresponding to the limiting key 123 a. Meanwhile, since the limit key 123a can limit the second wheel disc 122 in the circumferential direction of the first wheel shaft 123, the second wheel disc 122 and the first wheel shaft 123 cannot rotate relative to each other in the circumferential direction, and when the first wheel shaft 123 is rotated through the first adjusting and controlling member 150, the second wheel disc 122 can be smoothly driven to rotate. Compared with the way that the second wheel disc 122 is tightly pressed against the transmission member 140 and is driven by the first wheel axle 123, the first wheel disc 121 and the transmission member 140, the scheme of driving the second wheel disc 122 to rotate by the limit key 123a obviously further optimizes the driving reliability.

Since the limit key 123a is disposed on the first wheel axle 123, the sleeve portion 161 is also sleeved on the limit key 123a, and the limit key 123a and the first wheel axle 123 can rotate in the sleeve portion 161 without interference, so as to ensure that the first adjustment and control element 150 can smoothly control the driving wheel 120 to rotate. The sleeve portion 161 also forms a lead screw mechanism with the housing 110, and when the second adjustment member 160 is rotated, the sleeve portion 161 is driven axially so that the sleeve portion 161 approaches or moves away from the second disc 122. In the case where the jacket portion 161 abuts against the second disc 122 and urges the second disc 122 toward the first disc 121, the transmission radius of the driver 120 increases; when the thimble portion 161 is away from the second disc 122, the second disc 122 may tend to be away from the first disc 121 without being pushed by the thimble portion 161, and the transmission radius of the driver 120 may be reduced.

It should be noted that the embodiment of the present application is not limited to a specific type of the second adjustment member 160, and it may also be selected as a linear driving device (e.g., a linear motor, etc.), which can be directly connected to the second wheel 122 to drive the second wheel 122 to move.

In the embodiment of the present application, the type of the transmission member 140 may be various, such as a transmission belt, a transmission chain, and the like.

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 connecting line 142 connecting the plurality of balls 141 in series, and the transmission member 140 abuts against the two discs through the balls 141.

It should be understood that, under this structural layout, the ball 141 and the abutting surface 1201 of the wheel disc form a rolling fit relationship, and the friction resistance is smaller compared with the conventional sliding fit relationship, so that not only can the wear area between the structures be reduced, but also the difficulty of radial movement of the ball 141 along the driving wheel 120 when the wheel disc abuts against the ball 141 is effectively reduced, so as to facilitate the adjustment of the transmission radius of the driving wheel 120. This prevents the situation that the transmission element cannot be driven smoothly because of excessive frictional resistance in the conventional sliding-fit transmission element.

Furthermore, the ball 141 has a spherical shape, and the tapered surface can directly abut against the spherical surface of the ball 141 from the lower side without performing an additional fitting process step.

Further, as shown in fig. 9, the wheel disc may include a plurality of sliding grooves 1202 arranged in the circumferential direction on the abutting surface 1201, the sliding grooves 1202 being arranged to extend in the radial direction of the wheel disc, and the balls 141 may be slidably fitted to the sliding grooves 1202.

It should be understood that, since the transmission 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 matching with the balls 141. Specifically, the ball 141 and the sliding groove 1202 can be positioned and matched with each other, so that the ball 141 is limited by the sliding groove 1202 on the basis of the abutting action of the two discs, and therefore the slipping between the ball 141 and the abutting surface 1201 of the discs can be further prevented, and the transmission piece 140 and the driving wheel 120 are ensured to be maintained relatively fixed to realize transmission smoothly.

Meanwhile, the sliding groove 1202 is arranged to extend in the radial direction of the wheel disc, and the adjustment of the transmission radius of the driving wheel 120 is achieved through the radial movement of the ball 141 along the driving wheel 120, so that in the case that the extending direction of the sliding groove 1202 is consistent with the preset moving direction of the ball 141, the sliding groove 1202 can guide and restrict the movement of the ball 141 to ensure that the ball 141 always moves in the radial direction to avoid deviating from the preset track, thereby improving the reliability of the adjustment of the transmission radius of the driving wheel 120.

As shown in fig. 9, the chute 1202 of the embodiment of the present invention can be an arc chute 1202, so as to be adapted to the spherical surface of the ball 141, and the two are in arc line contact, so that compared with point contact, the contact area between the two is larger, the coating and attaching effect is better, and the technical effect of preventing the ball 141 from slipping can be further optimized. Of course, the embodiment of the present application does not limit the specific type of the sliding slot 1202, and the sliding slot 1202 may also be a rectangular slot, a triangular slot, or the like.

As shown in fig. 9, both wheels are provided with an abutment surface 1201 which is a conical surface, and both abutment surfaces 1201 open into a sliding slot 1202, but in an embodiment in which both wheels are provided with an abutment surface 1201 which is a conical surface, the sliding slot 1202 may be open into only one of the abutment surfaces 1201.

In an alternative, as shown in fig. 7, the driven wheel 130 includes a wheel body 131, the surface of the wheel body 131 engaged with the transmission member 140 may be provided with a plurality of recesses 131a, and the balls 141 may be positioned and engaged with the recesses 131 a. With such a layout, the concave portion 131a can position the ball 141, so as to improve the matching reliability of the ball 141 and the driven wheel 130, and prevent the ball 141 and the driven wheel 130 from slipping, thereby ensuring that the transmission member 140 and the driven wheel 130 are maintained relatively fixed to realize smooth transmission.

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

As shown in fig. 6 and 7, in embodiments where the reusable section 100 includes a first docking member 180, the transmission member 140 includes a first connecting section 1401 and a second connecting section 1402 between the driving wheel 120 and the driven wheel 130; the reusable section 100 may further include a first butt rod 181 and a second butt rod 182, both ends of the first butt rod 181 being connected to the first connecting section 1401 and the traction assembly, respectively, and both ends of the second butt rod 182 being connected to the second connecting section 1402 and the traction assembly, respectively.

In this arrangement, the first butt joint member 180 includes a first butt joint rod 181 and a second butt joint rod 182. In the transmission member 140, the transmission directions of the first connection section 1401 and the second connection section 1402 are opposite, for example, the first connection section 1401 transmits toward the driven wheel 130, and the second connection section 1402 transmits toward the driving wheel 120; in this case, the transmission member 140 can pull the pulling assembly through the first connecting section 1401 and the first butt rod 181, and can also pull the pulling assembly through the second connecting section 1402 and the second butt rod 182.

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

Further, as shown in fig. 7, each of the first and

second butt rods

181 and 182 includes a first rod segment 1801 and a second rod segment 1802, the first rod segment 1801 of the first butt rod 181 is connected to the first connection segment 1401, the first rod segment 1801 of the second butt rod 182 is connected to the second connection segment 1402, and the first rod segments 1801 are each hinged to the corresponding second rod segment 1802, and the second rod segment 1802 is used for connecting the traction assembly.

It should be understood that when the transmission ratio of the driving wheel 120 and the driven wheel 130 is adjusted, the transmission radius of the driving wheel 120 is changed, the extending direction of the first connecting section 1401 and the second connecting section 1402 is changed accordingly, and compared with fig. 4, the first connecting section 1401 and the second connecting section 1402 of fig. 6 are obviously inclined upwards and downwards respectively, in this case, the first connecting rod 181 and the second connecting rod 182 are also inclined accordingly, so that there is a problem that the first connecting rod interferes with the housing 110 of the reusable section 100, or even the second connecting rod of the disposable section 200 cannot be reliably connected.

In view of the above, the first and

second rod segments

1801, 1802 of the present embodiment are hinged to each other, the first rod segment 1801 may change its direction of extension with the first and

second connection segments

1401, 1402, and the second rod segment 1802 may maintain its original direction of extension by rotating relative to the first rod segment 1801, thus not interfering with the housing 110 of the reusable segment 100, and not destroying its assembly relationship with the second docking member of the disposable segment 200.

As shown in fig. 1 to fig. 3, based on the reusable segment 100, an embodiment of the present application further provides an operating handle, which includes a disposable segment 200 and the reusable segment 100 mentioned in any of the above solutions, so that the operating handle has the beneficial effects of any of the above solutions, and will not be described herein again.

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

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

The endoscope of the embodiment of the application can be a gastroscope, an enteroscope, a laryngoscope, a fiber bronchoscope and the like, and the embodiment of the application does not specifically limit the types of the endoscope.

In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A reusable section for use in an operating handle of an endoscope, said reusable section comprising a driving wheel, a driven wheel, a transmission member and a first resilient member, wherein:

the driving wheel comprises two wheel discs 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 disc;

the transmission part is sleeved on the driving wheel and the driven wheel and is propped against and fixed between the two wheel discs, and the transmission part can rotate along with the driving wheel to transmit so as to drive the traction assembly of the disposable section of the operating handle;

2. The reusable segment as recited in claim 1, wherein the reusable segment comprises a housing provided with a guide space arranged extending in a first direction, the driven wheel comprises a second wheel axle slidably fitted in the guide space; the first elastic piece is connected with the second wheel shaft and applies the pretightening force to the second wheel shaft.

3. The reusable section according to claim 2, wherein the housing comprises a guide seat arranged in an inner cavity of the housing, the guide seat is provided with two flanges which are oppositely arranged, and the guide space is defined between the two flanges; the second shaft is provided with a sliding block, and the second shaft is in sliding clamping fit with the two flanging edges through the sliding block.

4. The reusable segment as claimed in claim 3, wherein the guide seat includes a guide groove provided in the flange, the guide groove communicates with the guide space and extends along the first direction, the slider has two sliding portions arranged oppositely, and the sliding portions are in one-to-one corresponding sliding fit with the guide groove.

5. The reusable segment as claimed in claim 4, wherein the first elastic member is disposed in the guide groove, and both ends of the first elastic member are connected to the sliding portion and the guide seat, respectively.

6. The reusable segment as claimed in claim 3, wherein the slider is provided at an end of the second axle.

7. The reusable section according to claim 2, wherein the number of the guide spaces is two, the two guide spaces are disposed opposite to each other, and both ends of the second wheel axle are respectively slidably fitted in the two guide spaces.

8. The reusable section of any of claims 2 to 7, wherein the reusable section comprises an adaptor and a latch, the adaptor having a first end connected to the second axle and a second end extending out of the housing, the latch being threadedly engaged with the second end of the adaptor.

9. An operating handle comprising a disposable section and a reusable section as claimed in any one of claims 1 to 8, said reusable section being releasably connectable to said disposable section.

10. An endoscope, comprising the manipulation handle of claim 9.