CN111202486A

CN111202486A - Tensioning device for endoscope device

Info

Publication number: CN111202486A
Application number: CN202010177590.0A
Authority: CN
Inventors: 印眈峰
Original assignee: Ningbo Longtai Medical Technology Co ltd
Current assignee: Ningbo Longtai Medical Technology Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-05-29

Abstract

The application discloses a tensioning device for an endoscopic device, comprising a first shell, a second shell and a fastening mechanism arranged on the second shell; the first shell and the second shell are distributed along the longitudinal axis of the endoscope; the fastening mechanism supports at least one tensioning wire rope; the fastening mechanism is switched relative to the state of the first shell, and can drive the tensioning wire rope to be switched to a tensioning state.

Description

Tensioning device for endoscope device

Technical Field

The present application relates to the field of medical devices, and more particularly, to a tensioning device for an endoscopic device.

Background

As a conventional medical device, an endoscope is passed into the body through natural orifices of the body (e.g., the mouth, throat, esophagus, stomach, intestine, and anus, etc.) or through small surgically-made incisions. When in use, the endoscope is guided into the vicinity of a target area in a human body, and the angle of the endoscope is controlled by pulling a steel wire in the endoscope, so that the change of the relevant part is directly observed. In order to pull the endoscope for steering, the steel wire needs to be in a tensioned state to conduct force. Therefore, it is urgently required to develop a tensioning device for tensioning when the endoscope wire is loosened.

Disclosure of Invention

One of the embodiments of the present application provides a tensioning device for an endoscope. The tensioning mechanism comprises a first shell, a second shell and a fastening mechanism arranged on the second shell; the first shell and the second shell are distributed along the longitudinal axis of the endoscope; the fastening mechanism supports at least one tensioning wire rope; the fastening mechanism is switched relative to the state of the first shell, and can drive the tensioning wire rope to be switched to a tensioning state.

One of the embodiments of the present application provides an endoscope apparatus including: the tensioning device according to any embodiment of the present application, a tensioning wire rope wound around the tensioning device, a main body part for accommodating the tensioning device, and an endoscope connected to the main body part; the endoscope is used for extending into a target object; wherein one end of the tension wire rope extends to the main body part; the other end of the tension wire rope extends to the endoscope.

Drawings

The present application will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not intended to be limiting, and in these embodiments like numerals are used to indicate like structures, wherein:

FIG. 1 is a schematic view of an endoscope with a tensioning device according to some embodiments of the present application;

FIG. 2 is a perspective view of a tensioning device according to some embodiments of the present application;

FIG. 3 is a schematic diagram of a tensioner according to some embodiments of the present application;

FIG. 4 is a schematic view of the internal structure of a tensioner according to some embodiments of the present application; and

fig. 5A, 5B are perspective views of a tensioning device according to further embodiments of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

On the contrary, this application is intended to cover any alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the application as defined by the appended claims. Furthermore, in the following detailed description of the present application, certain specific details are set forth in order to provide a better understanding of the present application. It will be apparent to one skilled in the art that the present application may be practiced without these specific details.

Fig. 1 is a schematic view of a tensioner according to some embodiments of the present application, and the tensioner according to embodiments of the present application will be described in detail below with reference to fig. 1. It should be noted that the following examples are only for explaining the present application and do not constitute a limitation to the present application.

The endoscope can be inserted into a target object to acquire endoscopic image data of a target region. In some embodiments, the endoscopic site is inside the human body (e.g., throat, esophagus, stomach, and intestine, etc.). The endoscope device includes a bendable insertion portion that can be bent into various shapes to fit the body lumen, and a wire that can pull the insertion portion to bend and turn. The end of the insertion part is provided with an endoscope, and after the insertion part is inserted into the human body, the endoscope can be controlled to collect corresponding image data.

In some embodiments, before the endoscope is used, the steel wire needs to be tensioned to ensure that the force on the steel wire can be transmitted to the insertion part, so that the tail end of the insertion part is driven to change the direction, and the endoscope can acquire image data in different directions. In some embodiments, the endoscope is tensioned of the wire after production and assembly. However, during the use and repeated attachment and detachment of the endoscope, the wire may be loosened, so that the wire cannot effectively control the movement of the distal end of the insertion portion.

In view of the above problems, one or more embodiments described herein relate to a tensioning device for an endoscope, which can be connected to a wire on the endoscope to effect tensioning of the wire. In some embodiments, the tensioning device comprises a fastening mechanism; the fastening mechanism supports at least one tensioning wire rope and can be switched to a tensioning state under the driving of the fastening mechanism.

As shown in fig. 1, the endoscope apparatus 100 may include: body portion 110, endoscope 120, tensioning cable 140 (not shown in fig. 1), and insertion portion 130. In the figure, the main body 110 is connected to the endoscope 120 via the insertion portion 130. The endoscope 120 is located at the distal end of the insertion portion 130 and acquires image data, for example, a 2D image or a 3D image, within a target object. In some embodiments, the insertion portion is made of a material or structure having a certain flexibility, and can extend into different cavities of the human body. The insertion portion 130 may receive therein a tension wire 140, and one end of the tension wire 140 may extend to the body portion 110 and the other end may extend to the endoscope 120. The tension wire 140 may control the bending angle and the bending direction of the end of the insertion part 130.

The main body 110 contains a tensioning device 200, around which the tensioning wire 140 is wound, for tensioning thereof. The tensioning wire may be tensioned using the tensioning device 200 prior to use of the endoscope so that the main body portion 110 may control steering of the tip of the insertion portion 130 by controlling the tensioning wire 140.

In some embodiments, the main body 110 is provided with an operating portion 114. The operating part 114 may be connected to a tension wire 140 for manipulating the tension wire 140 to control the angle and direction of the end of the insertion part 130.

In some embodiments, the main body 110 may further include a tensioning operation portion; the tension operating part may control a state of the tension wire 140, for example, a tensioned state or a relaxed state. In some embodiments, the tensioning operation part and the operation part may be one component, i.e., the component can control both the tensioning of the tensioning wire rope and the rotation of the end of the insertion part 130.

In some embodiments, the tensioning device 200 may be removably coupled to the body portion 110. Specifically, the first housing 210 of the tensioner 200 may be removably coupled to the body portion 110. The detachable connection mode comprises but is not limited to one or a combination of more of threaded connection, pin connection, elastic deformation connection, lock catch connection, buckle connection, insertion connection and the like. In some embodiments, the tensioning device, insertion portion, endoscope may be configured for single use when the tensioning device 200 is removably coupled to the body portion 110. In the embodiment of the scene, the endoscope does not need to be cleaned after being used, and a new round of detection or data acquisition can be performed by directly replacing accessories consisting of the tensioning device, the insertion part and the endoscope.

In alternative embodiments, the tensioning device 200 may be fixedly attached to or integrally formed with the body portion 110. The fixing connection mode can include but is not limited to one or a combination of welding, riveting, gluing and the like. In this scenario of an embodiment, the tensioning device 200 may be removably coupled to the insert 130. The insertion portion 130 and the endoscope may be disposable. Specifically, after one examination is completed, a new round of examination or data collection can be performed by replacing the insertion portion 130 and the endoscope 120 with a new one.

In some embodiments, the tensioning wire 140 is wound around the tensioning device 200. In some embodiments, the tensioning wire 140 connects the tensioning device 200 to the body portion 110 and the endoscope 120. In some embodiments, to make the tensioning device 200 detachable from the body portion 110, the tensioning cord may be provided in a detachable connection with respect to the body portion 110. Specifically, one end of the tension wire 140 is provided with a hook portion; the hook part is detachably connected with the tensioning operation part. For example, the tensioning operation part may be provided with a hanging ring adapted to the hook part, and the tensioning wire rope 140 may be detachably connected by the matching of the hanging ring and the hook part. In some embodiments, the connection of the tension wire 140 to the main body 110 may also include other detachable connections. In some alternative embodiments, the tensioning cord 140 may also be provided non-detachable with respect to the body portion 110. At this time, a detachable connection is provided between the tension wire 140 and the endoscope 120. The tension device 200 can be separated from the insertion portion by separating the tension wire 140 from the endoscope 120, thereby achieving the design goal that the insertion portion and the endoscope are disposable.

In some embodiments, the tensioning wire 140 may be made of a material having certain mechanical properties of strength and toughness. Preferably, a metal material may be used as the material. The metal material is easily available and has good strength and toughness. More preferably, the tension wire rope 140 may be a steel wire or a tungsten wire. The steel wire and the tungsten wire have high strength and good toughness, and the service life and the reliability of the tensioning wire rope 140 can be ensured.

In some embodiments, the diameter of the tensioning wire 140 may be between 0.1mm and 2 mm. For example, the tensioning wire 140 may have a diameter of 0.1mm, 0.2mm, 0.4mm, 0.8mm, 1.0mm, 1.5mm, 1.8mm, and the like. Preferably, the diameter of the tension wire 140 may be between 0.2mm and 0.8 mm. The smaller the diameter of the tension wire 140, the smaller the space required, and the thinner the endoscope can be made; the larger the diameter of the tension wire 140, the higher the structural reliability thereof.

FIG. 2 is a perspective view of a tensioning device according to some embodiments of the present application; FIG. 3 is a schematic diagram of a tensioner according to some embodiments of the present application; FIG. 4 is a schematic diagram of the internal structure of a tensioner according to some embodiments of the present application. The tensioner according to embodiments of the present application will be described in detail below with reference to fig. 2-4. It should be noted that the following examples are only for explaining the present application and do not constitute a limitation to the present application.

In an embodiment of the present application, as shown in fig. 2-4, the tensioning device 200 may comprise a first housing 210, a second housing 220, and a fastening mechanism 230, said first housing 210 and said second housing 220 being distributed along the longitudinal axis of the endoscope (the longitudinal axis is shown in phantom in fig. 2-4). In some embodiments, the fastening mechanism 230 may be disposed on the second housing 220 and support the at least one tensioning wire 140. The fastening mechanism 230 can be switched to the first housing 210, and can drive the tensioning wire 140 to be switched to the tensioning state.

In some embodiments, the fastening mechanism 230 includes at least two support rods 232, and one end of the at least one tensioning wire 140 extends to the first housing and the other end extends to the second housing. Further, in some embodiments, there may be one tensioning wire 140. One end of the one tension wire 140 may extend to the main body part 110; the other end of the tensioning wire rope may extend to the endoscope 120. In some embodiments, there may be two tensioning cords 140. Each tensioning wire 140 needs to be wound around the at least two support bars 232, respectively. When there is only one tension wire 140, the resistance to movement is greater, and the direction of rotation of the insertion portion 130 is limited; when there are two tension cords 140, the insertion portion 130 is more flexibly steered.

In some embodiments, a top block 212 is disposed on the first housing 210, and the top block 212 is movable between the two support rods 232 along the longitudinal axis of the tensioner. The movement of the top block 212 may switch the tension wire wound around the support rod to a tensioned state.

In some embodiments, there may be more than one support rod 232. The top block 212 may move between any two support rods. For example, the number of the support rods 232 may be three, and the 3 support rods 232 support the tension wire 140; the top block 212 can be moved between any two support rods so that the tension wire wound around the support rods is switched to a tensioned state.

In some embodiments, the top block 212 may move toward the support rod 232 in a longitudinal axial direction. The opposite movement means that the distance between the two objects is continuously reduced. In this scenario embodiment, as shown in fig. 3, the tensioning wire 140 may be disposed across between the top block 212 and the support rod 232. When the top block 212 and the supporting rod 232 approach each other, the top block 212 presses the tensioning wire 140 and drives the tensioning wire 140 to move, so that the tensioning wire 140 is switched to a tensioning state.

In other embodiments, the top block 212 may move away from the support rod 232 in a longitudinal axial direction. The back-to-back movement refers to the distance between two objects increasing continuously. In this scenario embodiment, as shown in fig. 4, the tension wire 140 may be disposed across between the top block 212 and the first housing 210. When the top block 212 is far away from the supporting rod 232, the top block 212 can hook the crossing part of the tensioning wire rope 140 through the hook part arranged at the tail end of the top block, and then the crossing part of the tensioning wire rope 140 is driven to move together, so that the tensioning wire rope 140 is switched to a tensioning state.

In some embodiments, the top block 212 may be provided in a regular shape that may be provided with less corners. Such as elliptical, spherical, hemispherical, and cylindrical shapes with smooth outer surfaces. The smooth outer surface of the top block 212 does not have a sharp corner when contacting the tensioning wire rope 140, thereby avoiding stress concentration on the tensioning wire rope 140 caused by the sharp corner and prolonging the service life of the tensioning wire rope 140.

In some embodiments, the top block 212 may be fixedly connected with respect to the first housing 210, and the first housing 210 may drive the top block 212 to move with respect to the second housing. The fixing connection mode can include but is not limited to one or a combination of welding, riveting, gluing and the like. In some embodiments, the top block 212 may be integrally formed with the first housing 210. The shape and structure of the top block 212 may be obtained directly on the first housing 210 by one or a combination of several methods, such as casting, injection molding, turning, additive manufacturing, etc. In some embodiments, the top block 212 may be removably coupled to the first housing 210. For example, the connection means may include, but is not limited to, a threaded connection, a pin connection, an elastically deformable connection, a snap connection, a plug connection, and the like.

In some embodiments, the top block 212 may be movably disposed with respect to the first housing 210.

In some embodiments, the top block 212 can slide relative to the first housing 210 over a stroke. In some embodiments, the stroke of the top block 212 may be between 5mm and 50 mm. For example, the stroke of the top block 212 may be 8mm, 15mm, 23mm, 31mm, 40mm, 48mm, and the like. Preferably, the stroke of the top block 212 may be between 8mm and 40 mm. More preferably, the stroke of the top block 212 may be between 10mm and 30 mm. The greater the stroke of top block 212, the longer it can adjust the length of the tensioning cable, but the greater the volume required for tensioner 200; the smaller the stroke of top block 212, the smaller the volume of tensioner 200, but the shorter the length of the adjustable tensioning cable.

In some embodiments, when the top block 212 can move relative to the first housing 210, a limiting mechanism can be disposed on the first housing 210 along the moving direction of the top block 212 for limiting the moving stroke of the top block 212. The limiting mechanism includes, but is not limited to, any combination of one or more forms of a stop, a baffle, a limiting groove, a stop block and the like. For example, if the first housing is provided with a sliding groove for guiding the movement of the top block, a stopper may be provided in the sliding groove to limit the sliding of the top block 212, and the top block 212 can only slide within a certain stroke of the sliding groove.

In some embodiments, relative movement between the top block 212 and the support rod 232 may be achieved by a drive mechanism. The driving mechanism can drive the top block 212 to move towards/relative to the supporting rod 232, so as to drive the tensioning wire 140 to move together, and the tensioning wire 140 is switched to the tensioning state. The driving mechanism may include, but is not limited to, a gear, a rack and a motor, or a lead screw, a nut and a motor, or other driving or transmission components, etc.

It should be noted that, on the basis of the present application, those skilled in the art can make various reasonable changes to the technical solution of the present application. For example, the motor may be in various forms such as a stepping motor, a servo motor, and the like. For another example, the position and arrangement of the drive mechanism may be varied. Such variations are intended to be within the scope of the present application.

In some embodiments, a retaining device is further provided after the top block 212 is moved to maintain the position of the top block 212 relative to the first housing 210. The manner in which the retaining means is arranged may vary. For example, when the top block 212 slides in a sliding slot, a one-way slot may be provided in the sliding slot, and the one-way slot may be used to maintain the state of the top block 212. For another example, when top block 212 is moved using a drive motor, a locking force may be placed on the drive motor that may resist movement of top block 212. For another example, a catch plate may be provided on the slide groove to hold the top block 212 in the moved state.

As shown in fig. 2, the first housing 210 may further be provided with a one-way movement catch 215. The one-way movement catch 215 may be provided at a region where the first housing 210 and the second housing 220 move with each other, for restricting movement of the first housing 210 in one direction. In particular, the one-way movement catch 215 may be provided as a ratchet. In some embodiments, the one-way movement catch 215 may allow the first housing 210 to approach the second housing 220 relatively, and restrict the first housing 210 from moving away from the second housing 220 relatively. In some embodiments, the purpose of the one-way motion catch 217 is to maintain the tension of the tension wire 140.

In some alternative embodiments, a fixing device may be added to the first housing 210 to keep the tension wire in a tensioned state. In some embodiments, the fixing device may limit the movement of the second housing 220 relative to the first housing 210, such that the distance between the first housing 210 and the second housing 220 remains constant, thereby maintaining the state of tensioning the wire rope in a tensioned state at all times. Including but not limited to rigid cords, hooks, latches, etc. For example, the first housing 210 and the second housing 220 may be provided with corresponding insertion holes, and the first housing 210 and the second housing 220 may be maintained in a relatively fixed state by the engagement of the pins and the insertion holes. In some embodiments, a corresponding mechanical connection may be provided on the fixing device, so that the relatively fixed state of the first housing 210 and the second housing 220 is maintained. For example, the mechanical connection means may include, but is not limited to, a threaded connection, a pin connection, an elastically deformable connection, a snap connection, a plug connection, and the like. For example, when the fixing means is a screw connection, the first housing and the second housing may be directly brought close to/away from each other by screwing; meanwhile, the engagement between the threads may ensure that the state between the first and

second housings

210 and 220 is maintained.

In some embodiments, as shown in fig. 2-4, the first housing is provided with a position-limiting portion 217 that limits the maximum moving distance of the first housing relative to the second housing. For example, as shown in fig. 2, the position-limiting portion 217 is a position-limiting block annularly distributed on the first housing 210, and when the second housing 220 contacts the position-limiting portion 217, the maximum moving distance is reached. The position-limiting part can have various forms, for example, the position-limiting part comprises but is not limited to any combination of one or more forms of a position-limiting block, a position-limiting plate, a position-limiting groove, a stop groove and the like. The shape and the limiting manner of the limiting part can be designed specifically by those skilled in the art according to the needs, and the application is not limited to this.

In actual use, the operator can operate the push rod 212 to tension the tension wire 140. Specifically, when the tensioning wire 140 is located between the support rod and the push rod 212 (as shown in fig. 3), the operator can operate the push rod 212 to make the push rod 212 bring the tensioning wire 140 close to the support rod 232, so that the tensioning wire 140 is tensioned. When the tensioning wire 140 is between the first housing 210 and the push rod 212 (as shown in fig. 4), the operator can operate the push rod 212 to make the push rod 212 move the tensioning wire 140 away from the support rod 232, so that the tensioning wire 140 is tensioned. After tensioning is completed, the tensioning wire rope can be kept in a tensioned state by the above-mentioned one-way movement buckle or fixing device.

FIG. 5 is a perspective view of a tensioning device according to other embodiments of the present application. Wherein fig. 5A is a schematic view of a first state of a fastening mechanism according to some embodiments, and fig. 5B is a schematic view of a second state of a fastening mechanism according to some embodiments.

In some embodiments, as shown in fig. 5A, the fastening mechanism 230 includes two support rods 232, and the tensioning wire 140 is wound around the two support rods 232. At least one of the two support rods is movably disposed with respect to the fastening mechanism 230. Specifically, the two support rods can move toward/away from each other along the first direction a (as shown in fig. 5A). When the two support rods move away from each other (as shown in fig. 5B), the length of the tension wire 140 wound between the support rods increases, and the tension wire 140 is under tension. In some alternative embodiments, there may be one and only one of the two support rods.

In some embodiments, a motor may be used to drive at least one support rod 232 to perform the back/forth movement. For example, the fastening mechanism 230 may be provided with a sliding slot and a sliding block, the sliding block may slide in the sliding slot and is connected to the at least one support rod, and the sliding block may slide in the sliding slot under the driving of the motor to realize the movement of the at least one support rod.

In some embodiments, the movement of the support rods toward and away from each other can be achieved in a variety of ways to achieve the switching of the tension wire 140 to the tensioned state. In some embodiments, the support rods can move toward and away from each other by adding a moving mechanism. For example, the moving mechanism may include a motor, a worm having a first spiral section and a second spiral section with opposite rotation directions, a first rack and a second rack, the first and second racks being respectively connected to the two support rods 232. The first and second racks can move in opposite directions during rotation of the worm so that the two support bars 232 can move in opposite directions.

It should be noted that, on the basis of the present application, those skilled in the art can make various reasonable changes to the technical solution of the present application. For example, the motor may be in various forms such as a stepping motor, a servo motor, and the like. For another example, the form of the movement mechanism may be various. For example, the movement mechanism may be implemented by a gear and a rack in cooperation. For another example, the motion mechanism may adopt a screw rod and nut matching mode, etc. Such variations are intended to be within the scope of the present application.

In some embodiments, the switching of the tension wire 140 to the tension state may be achieved by a plurality of mechanisms moving together. For example, the first housing 210 may be provided with a top block, the top block may move between the two support rods, and the two support rods may also move toward/away from each other at the same time. Under the combined action of the top block and the two support rods, the tension wire 140 wound around the support rods can be in a tension state.

The advantages that may be provided by the tensioning devices disclosed herein include, but are not limited to: (1) the steel wire in the endoscope can be quickly tensioned by the tensioning device; (2) the tensioning device is small and portable and can be perfectly meshed with the main body part of the endoscope; (3) the tensioning device is detachably connected with the insertion part of the endoscope device, so that the insertion part can be replaced quickly; (4) the endoscope device adopting the tensioning device does not need to be repeatedly cleaned and can be used for one time. It is to be noted that different embodiments may produce different advantages, and in different embodiments, any one or combination of the above advantages may be produced, or any other advantages may be obtained.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be considered merely illustrative and not restrictive of the broad application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present application. Other variations are also possible within the scope of the present application. Thus, by way of example, and not limitation, alternative configurations of the embodiments of the present application can be viewed as being consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to only those embodiments explicitly described and depicted herein.

Claims

1. A tensioning device for an endoscopic device comprising a first housing, a second housing, and a fastening mechanism disposed on the second housing; the first shell and the second shell are distributed along the longitudinal axis of the endoscope;

the fastening mechanism supports at least one tensioning wire rope; the fastening mechanism is switched relative to the state of the first shell, and can drive the tensioning wire rope to be switched to a tensioning state.

2. The tensioning device of claim 1, wherein the fastening mechanism includes at least two support rods around which the at least one tensioning wire rope is wound, and wherein a first end of the at least one tensioning wire rope extends to the first housing and another end of the at least one tensioning wire rope extends to the second housing.

3. The tensioner as in claim 2, wherein the first housing has a top block disposed thereon; the fastening mechanism comprises two support rods; the top block can move between the two support rods along the longitudinal axis direction; the movement of the top block can enable the tension wire rope wound on the support rod to be in a tension state.

4. The tensioner as in claim 3, wherein the top block is fixedly disposed relative to the first housing; the first shell drives the ejector block to move relative to the second shell.

5. The tensioner as in claim 4, wherein the first housing has a one-way motion catch disposed thereon that allows the first housing and the second housing to move relatively closer together and restricts the first housing and the second housing from moving relatively farther apart.

6. The tensioner as in claim 4, wherein the first housing has a limit stop disposed thereon, the limit stop limiting a maximum travel distance of the first housing relative to the second housing.

7. A tensioner as claimed in claim 2, wherein the fastening mechanism comprises two support rods, at least one of which is movably arranged relative to the second housing; when the two support rods are far away from each other, the tensioning wire rope wound on the support rods is in a tensioning state.

8. An endoscopic device, comprising: the tensioning device of any one of claims 1 to 7, a tensioning wire rope wound around the tensioning device for receiving a body portion of the tensioning device, an endoscope connected to the body portion; the endoscope is used for extending into a target object;

wherein one end of the tension wire rope extends to the main body part; the other end of the tension wire rope extends to the endoscope.

9. The endoscopic device of claim 8 wherein one end of said tensioning wire is provided with a hook portion; the main body part is provided with a tensioning operation part; the hook part is detachably connected with the tensioning operation part.

10. The endoscopic device of claim 8 wherein the first housing of the tensioning device is removably coupled to the body portion.