Handle structure for increasing traction rotation damping and endoscope

Abstract

The utility model discloses a handle structure capable of increasing traction rotation damping and an endoscope. The handle structure capable of increasing traction rotation damping comprises a shell and a rotating piece. A mounting part is arranged on the shell; the rotating piece is rotationally mounted on the mounting part; the size difference exists between at least local positions of the mounting part and the rotating part, so that the mounting part and the rotating part are in at least local interference fit, and damping force can be formed between the rotating part and the mounting part when the rotating part rotates relative to the mounting part; in this way, components of the handle structure for increasing traction rotation damping can be simplified, and the problem that in the prior art, due to the poor machining precision of a sleeve, the locking effect of the insertion part is poor can be solved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a handle structure and endoscope that increases traction rotation damping. Background Technology

[0002] Endoscopes typically consist of a handle and an insertion section. The insertion section is used to insert into the patient's body for examination and treatment of affected areas. The handle is used by medical personnel to hold and adjust the examination angle of the insertion section and to deliver gas or fluid. Some endoscopes' handles include a housing, a rotating wheel, and a traction rope. The rotating wheel is mounted on the housing, and the traction rope connects to the wheel and the insertion section at both ends. The rotation of the wheel causes the traction rope to cause the insertion section to bend laterally. Furthermore, depending on the specific application, it is necessary to lock the insertion section into its bent state to achieve diagnosis and treatment of specific areas. In existing technology, a sleeve is usually placed between the rotating wheel and the housing. When the rotating wheel rotates relative to the housing, the sleeve creates a damping force between the wheel and the housing, thereby locking the current bent state of the insertion section. However, due to limitations in manufacturing precision, the wall thickness tolerance of the sleeve is relatively large, thus affecting the locking effect on the insertion section. Utility Model Content

[0003] The main purpose of this invention is to propose a handle structure and endoscope that increases traction rotation damping, aiming to solve the problem that the existing sleeve reduces the locking stability of the insertion part due to its poor processing accuracy.

[0004] To achieve the above objectives, this utility model proposes a handle structure that increases traction rotation damping, comprising:

[0005] A housing, wherein a mounting portion is provided on the housing; and,

[0006] A rotating component, which is rotatably mounted on the mounting portion;

[0007] The mounting portion and the rotating member have at least a partial dimensional difference, such that the mounting portion and the rotating member are at least partially interference-fitted, so that a damping force can be generated between the rotating member and the mounting portion when the rotating member rotates relative to the mounting portion.

[0008] Preferably, the handle structure for increasing traction rotation damping includes a positioning post and a positioning hole that are plugged into each other. The positioning post can rotate axially within the positioning hole, and the positioning post and the positioning hole are at least partially interference-fitted.

[0009] The positioning post is provided in one of the housing and the rotating component, and the positioning hole is provided in the other.

[0010] The mounting part includes the positioning post or the positioning hole.

[0011] Preferably, the positioning post has a connecting end and a plug-in end disposed opposite to each other in its axial direction, the plug-in end being inserted into the positioning hole, and the outer diameter of the positioning post and / or the inner diameter of the positioning hole are gradually reduced in the direction from the connecting end to the plug-in end.

[0012] Preferably, in the direction from the connecting end to the plug-in end, the outer diameter of the positioning post and the inner diameter of the positioning hole are both gradually tapered, and the shrinkage of the outer diameter of the positioning post is less than the shrinkage of the inner diameter of the positioning hole, so that the positioning post is at least in an interference fit with the positioning hole at its plug-in end.

[0013] Preferably, the positioning post is at least partially flexible and / or the inner wall of the positioning hole is at least partially flexible, so as to undergo elastic deformation under the contact pressure between the positioning post and the positioning hole.

[0014] Preferably, the positioning post is disposed on the housing;

[0015] The positioning hole is provided on the rotating member, and the rotating member is provided with an annular groove around the positioning hole, and an annular retaining ring is formed between the annular groove and the positioning hole. The annular retaining ring is configured to be able to elastically expand when the positioning hole and the positioning post are in an interference fit.

[0016] Preferably, the annular retaining ring has a notch for partially dividing the annular retaining ring.

[0017] Preferably, at least two notches are provided, and the two notches are distributed at intervals along the circumference of the annular retaining ring to divide the annular retaining ring into at least two parts. When the positioning post is inserted into the positioning hole, both parts expand outward and deform.

[0018] Preferably, a cavity is formed inside the housing, the mounting portion is provided on the inner wall of the cavity, and an elongated hole communicating with the cavity is provided on the housing;

[0019] The rotating component is housed within the cavity and rotatably mounted on the mounting portion. A lever is provided on the rotating component, with one end of the lever extending out of the housing from the elongated hole. The lever can reciprocate within the elongated hole along the long axis of the elongated hole, thereby causing the rotating component to rotate in both directions relative to the mounting portion.

[0020] This utility model also provides an endoscope, including the above-mentioned handle structure with increased traction rotation damping.

[0021] This utility model provides a handle structure for increasing traction rotational damping, including a housing and a rotating component. The housing has a mounting portion, and the rotating component is rotatably mounted on the mounting portion. By setting a dimensional difference at least partially between the mounting portion and the rotating component, the mounting portion and the rotating component can achieve an interference fit at least partially. This interference fit creates contact pressure between the mounting portion and the rotating component. When the rotating component rotates relative to the mounting portion, the contact pressure is converted into a damping force between the mounting portion and the rotating component, thereby allowing the rotating component to remain in its current position when the external force is removed. In other words, there is no need to provide a sleeve between the mounting portion and the rotating component; simply setting a dimensional difference between the mounting portion and the rotating component is sufficient to maintain the position of the rotating component, thus locking the current bent state of the insertion portion. This not only simplifies the components of the handle structure for increasing traction rotational damping but also solves the problem of poor locking effect of the insertion portion caused by poor sleeve machining accuracy in existing technologies. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of an embodiment of a handle structure (with one housing hidden therein) for increasing traction rotation damping provided by this utility model;

[0024] Figure 2 for Figure 1 An exploded view of the handle structure described above;

[0025] Figure 3 for Figure 1 A schematic diagram of the handle structure along section AA;

[0026] Figure 4 for Figure 3 An exploded view of the handle structure described above;

[0027] Figure 5 for Figure 3 A cross-sectional view of the handle structure described above;

[0028] Figure 6 for Figure 5 An enlarged schematic diagram of part B of the handle structure described above;

[0029] Figure 7 for Figure 1A schematic diagram of the handle structure with respect to the positioning post;

[0030] Figure 8 for Figure 1 A schematic diagram of the rotating component of the handle structure described above;

[0031] Figure 9 for Figure 8 A schematic diagram of the handle structure along the CC section.

[0032] Explanation of icon numbers:

[0033] 100 Handle structure with increased traction rotation damping; 1 Housing; 11 Cavity; 12 Elongated hole; 2 Mounting part; 3 Rotating part; 31 Annular groove; 32 Annular retaining ring; 321 Division; 33 Notch; 34 Lever; 41 Positioning pin; 411 Connecting end; 412 Insertion end; 42 Positioning hole; 43 Stepped hole.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] This invention provides a handle structure 100 with increased traction rotation damping, which is suitable for endoscopes. Endoscopes typically also include an insertion section (not shown) for insertion into a patient to examine and treat affected areas. The handle structure 100 with increased traction rotation damping is designed for medical personnel to grip, facilitating better examination and treatment. Please refer to [link to relevant documentation]. Figure 1 and Figure 2 The handle structure 100 for increasing traction rotation damping includes a housing 1 and a rotating component 3; a mounting cavity is formed inside the housing 1, and a mounting part 2 is provided inside the mounting cavity; the rotating component 3 is housed in the mounting cavity and rotatably mounted on the mounting part 2.

[0039] The handle structure 100 for increasing traction rotation damping typically also includes a traction structure (not shown in the figure). This traction structure includes at least one traction rope, one end of which is wound around the rotating member 3, and the other end of which is connected to the insertion part. When an external force is applied to the rotating member 3 to make it rotate, the traction rope wraps around the rotating member 3, thereby pulling the traction rope and causing the insertion part to bend and deform on the over-stretched side. At this time, the pulled traction rope will generate a reaction force on the rotating member 3.

[0040] In actual use, after the external force applied to the rotating member 3 is removed, the rotating member needs to be locked so that the insertion part is locked in the current bending deformation state. Usually, an intermediate part, such as a hollow sleeve, is set between the rotating member and the mounting part to make an interference fit between the mounting part and the rotating member. At this time, a contact pressure is formed between the mounting part and the rotating member. When the rotating member rotates relative to the mounting part, the contact pressure between the mounting part and the rotating member is converted into a damping force. The damping force between the mounting part and the rotating member interacts with the reaction force generated by the traction rope on the rotating member. When the external force on the rotating member is removed, the rotating member can remain in the current position, thereby achieving the locking of the bending deformation state of the insertion part.

[0041] It is understandable that, during the processing of the hollow sleeve, due to limitations in processing precision, the wall thickness of different sleeves in the same batch varies significantly. Consequently, after the sleeves are assembled, in some products, the interference fit between the mounting part and the rotating part is small, resulting in low contact pressure between them. Under the pull of the traction rope, the rotating part is prone to reverse rotation, leading to poor locking effect on the insertion part. In other products, the interference fit between the mounting part and the rotating part is large, resulting in high contact pressure. Medical personnel need to apply greater force to rotate the rotating part, causing inconvenience to their use.

[0042] Based on the above-mentioned technical problems, this utility model improves the handle structure 100 with increased traction rotation damping. The endoscope handle device will be described below with reference to the accompanying drawings.

[0043] Please see Figure 1 and Figure 2 In an embodiment of this utility model, the mounting part 2 and the rotating member 3 have at least a partial dimensional difference, such that the mounting part 2 and the rotating member 3 are at least partially interference-fitted, so that when the rotating member 3 rotates relative to the mounting part 2, a damping force can be formed between the rotating member 3 and the mounting part 2.

[0044] In other words, by setting a dimensional difference at least in a local position between the mounting part 2 and the rotating part 3, the mounting part 2 and the rotating part 3 can be interference-fitted at least in a local position. The interference fit creates contact pressure between the mounting part 2 and the rotating part 3. When the rotating part 3 rotates relative to the mounting part 2, the contact pressure is converted into a damping force between the mounting part 2 and the rotating part 3, so that the rotating part 3 can remain in its current position when the external force is removed. That is to say, there is no need to set a sleeve between the mounting part 2 and the rotating part 3. The position of the rotating part 3 can be maintained directly by setting a dimensional difference between the mounting part 2 and the rotating part 3, thereby locking the current bent state of the insertion part. In this way, not only can the components of the handle structure 100 be simplified, but the problem of poor locking effect of the insertion part due to poor sleeve processing accuracy in the prior art can also be solved.

[0045] This application does not impose specific limitations on the rotational mounting method between the rotating member 3 and the mounting part 2. In one embodiment, please refer to... Figure 2 The handle structure 100 includes a positioning post 41 and a positioning hole 42 that are inserted into each other. The positioning post 41 can rotate axially within the positioning hole 42, and the positioning post 41 and the positioning hole 42 are at least partially interference-fitted. The positioning post 41 is provided in one of the housing 1 and the rotating member 3, and the positioning hole 42 is provided in the other. The mounting part 2 includes either the positioning post 41 or the positioning hole 42.

[0046] Specifically, the housing 1 is provided with the positioning post 41, and the rotating member 3 is provided with the positioning hole 42; the rotating member 3 is sleeved on the positioning post 41 through the positioning hole 42; the rotating member 3 is rotatable relative to the positioning post 41; correspondingly, the mounting part 2 includes the positioning post 41. By setting the outer diameter of at least a partial position on the positioning post 41 to be larger than the inner diameter of the corresponding position on the positioning hole 42, the positioning post 41 and the positioning hole 42 are at least partially interference-fitted, thereby generating a damping force between the positioning post 41 and the positioning hole 42.

[0047] The following description uses a specific embodiment as an example, in which "the positioning post 41 is disposed on the housing 1 and the positioning hole 42 is disposed on the rotating member 3".

[0048] In one embodiment, please refer to Figures 3 to 7The positioning post 41 has a connecting end 411 and a plug-in end 412 disposed opposite to each other in its axial direction. The connecting end 411 is connected to the housing 1, and the plug-in end 412 is inserted into the positioning hole 42. In the direction from the connecting end 411 to the plug-in end 412, the outer diameter of the positioning post 41 and / or the inner diameter of the positioning hole 42 are gradually decreasing. That is, the outer diameter of the positioning post 41 is gradually decreasing, or the inner diameter of the positioning hole 42 is gradually decreasing, or both the outer diameter of the positioning post 41 and the inner diameter of the positioning hole 42 are gradually decreasing.

[0049] In an exemplary embodiment, the inner diameter of the positioning hole 42 remains unchanged; the outer diameter of the positioning post 41 gradually decreases from the connecting end 411 to the insertion end 412; that is, the radial dimension of the connecting end 411 is larger than the radial dimension of the insertion end 412; when the positioning post 41 is inserted into the positioning hole 42, the positioning hole 42 and the connecting end 411 are interference-fitted, thereby generating a damping force between the positioning post 41 and the positioning hole 42.

[0050] In an exemplary embodiment, the outer diameter of the positioning post 41 remains unchanged; the inner diameter of the positioning hole 42 gradually decreases from the connecting end 411 to the plug-in end 412; that is, the positioning hole 42 has a larger diameter at the position corresponding to the connecting end 411 and a smaller diameter at the position corresponding to the plug-in end 412; when the positioning post 41 is inserted into the positioning hole 42, the positioning hole 42 and the plug-in end 412 are interference-fitted, thereby generating a damping force between the positioning post 41 and the positioning hole 42.

[0051] In one exemplary embodiment, please refer to Figure 5 and Figure 6 In the direction from the connecting end 411 to the plug-in end 412, the outer diameter of the positioning post 41 and the inner diameter of the positioning hole 42 are both gradually tapered, and the shrinkage of the outer diameter of the positioning post 41 is less than the shrinkage of the inner diameter of the positioning hole 42, so that the positioning post 41 is at least at its plug-in end 412 in an interference fit with the positioning hole 42, thereby generating a damping force between the positioning post 41 and the positioning hole 42.

[0052] Specifically, considering the interference fit between the positioning post 41 and the positioning hole 42, if the contact pressure between the positioning post 41 and the positioning hole 42 is too high, a large external force will be required to rotate the rotating component 3, which is not conducive to the operation of medical personnel. By setting the positioning post 41 to have a clearance fit with the positioning hole 42 at its connecting end 411, when the positioning post 41 is inserted into the positioning hole 42, the positioning post 41 only has an interference fit with the positioning hole 42 at its insertion end 412. This reduces the contact pressure between the positioning post 41 and the positioning hole 42 while maintaining the position of the rotating component 3, thus facilitating the rotation of the rotating component 3 by medical personnel.

[0053] Following the above, in the direction from the connecting end 411 to the insertion end 412, the outer diameter of the positioning post 41 gradually decreases; typically, the positioning post 41 is injection molded, and considering the manufacturing process of the positioning post 41, a certain draft angle is set for the positioning post 41, generally set to 0-5°; that is, please refer to... Figure 6 The side wall of the positioning post 41 forms a first included angle θ1 with the surface of the housing 1, and the first included angle θ1 is set to 90 to 95°.

[0054] Furthermore, in the direction from the connecting end 411 to the plug-in end 412, the inner diameter of the positioning hole 42 is gradually reduced. Considering the fit between the positioning post 41 and the positioning hole 42, as well as material properties, please refer to [link to relevant documentation]. Figure 6 A second included angle θ2 is formed between the inner wall of the positioning hole 42 and the surface of the housing 1, and the second included angle θ2 is 5 to 10° larger than the first included angle θ1.

[0055] Understandably, in interference fits, the bore or shaft is typically made of a rigid material to ensure a tight connection and reliable torque transmission. However, in certain applications, to increase the flexibility of the component and reduce assembly difficulty, the bore or shaft is designed to allow for a certain degree of elastic deformation, thereby accommodating the interference during assembly and providing additional functional advantages.

[0056] In embodiments of this invention, the positioning post 41 is at least partially flexible and / or the inner wall of the positioning hole 42 is at least partially flexible, so that it undergoes elastic deformation under the contact pressure between the positioning post 41 and the positioning hole 42. By making the positioning post 41 at least partially flexible and / or the inner wall of the positioning hole 42 at least partially flexible, the positioning post 41 and / or the positioning hole 42 can undergo reversible deformation under force and return to their original shape after the external force is removed; thus, when the positioning post 41 is assembled into the positioning hole 42, the assembly stress between the positioning post 41 and the positioning hole 42 can be reduced, and material damage can be avoided.

[0057] This invention does not impose specific limitations on the flexible arrangement of the positioning post 41 and the positioning hole 42. The positioning post 41 may be at least partially flexible; the inner wall of the positioning hole 42 may be at least partially flexible; or at least a portion of the positioning post 41 and at least a portion of the inner wall of the positioning hole 42 may be flexible.

[0058] This invention does not impose specific limitations on the flexible arrangement of the positioning post 41 and the positioning hole 42. When the positioning post 41 is at least partially flexible, it can be made to have a certain degree of elasticity, which not only facilitates insertion into the positioning hole 42 but also reduces damage to the positioning post 41 during assembly. Typically, the positioning post 41 is made of polymer materials such as polyurethane or nylon, and injection molding, extrusion molding, or other processes are used to make the molded positioning post 41 elastic at least in some areas.

[0059] When the inner wall of the positioning hole 42 is at least partially flexible, the positioning hole 42 can have a certain degree of elasticity, which not only facilitates the assembly of the positioning post 41, but also reduces damage to the inner wall of the positioning hole 42 during assembly. Typically, a positioning hole 42 with a thin-walled structure is used, and this thin-walled structure has a certain elastic deformation capacity, thereby making the inner wall of the positioning hole 42 at least partially flexible.

[0060] In one embodiment, please refer to Figure 4 and Figure 8 The positioning post 41 is disposed on the housing 1; the positioning hole 42 is disposed on the rotating member 3, the rotating member 3 is provided with an annular groove 31 around the positioning hole 42, and an annular retaining ring 32 is formed between the annular groove 31 and the positioning hole 42. The annular retaining ring 32 is configured to be able to elastically expand when the positioning hole 42 and the positioning post 41 are in an interference fit.

[0061] In other words, the positioning post 41 is provided on the housing 1, and the positioning hole 42 is provided on the rotating part 3; at the same time, the annular groove 31 is provided around the positioning hole 42, thereby forming the annular retaining ring 32. The annular retaining ring 32 is the thin-walled structure of the positioning hole 42. The annular retaining ring 32 has a certain elastic deformation capability. When the positioning post 41 is inserted into the positioning hole 42, the positioning hole 42 and the positioning post 41 are interference-fitted. At this time, the annular retaining ring 32 will elastically expand, which not only allows the annular retaining ring 32 to tightly wrap the positioning post 41, but also prevents damage to the inner wall of the positioning hole 42 when the positioning post 41 is inserted into the positioning hole 42.

[0062] Specifically, please refer to Figure 8 and Figure 9 The annular retaining ring 32 is provided with a notch 33 to partially divide the annular retaining ring 32. By providing the notch 33 to divide the annular retaining ring 32, when the positioning pin 41 is inserted into the positioning hole 42, the positioning hole 42 and the positioning pin 41 are interference-fitted, and the annular retaining ring 32 is more likely to undergo outward expansion deformation at the position of the notch 33, thereby realizing the elastic expansion of the annular retaining ring 32.

[0063] Specifically, at least two notches 33 are provided, and the two notches 33 are arranged at intervals along the circumference of the annular retaining ring 32 to divide the annular retaining ring 32 into at least two parts 321. When the positioning pin 41 is inserted into the positioning hole 42, the positioning hole 42 and the positioning pin 41 are interference-fitted, and the two parts 321 of the annular retaining ring 32 expand outward in opposite directions, thereby realizing the elastic expansion of the annular retaining ring 32.

[0064] This invention does not impose a specific limitation on the number of notches 33. The notches 33 can be two, dividing the annular retaining ring 32 into two portions 321; the notches 33 can be three, dividing the annular retaining ring 32 into three portions 321; or the notches 33 can be four, dividing the annular retaining ring 32 into four portions 321.

[0065] In one embodiment, please refer to Figure 6 The rotating component 3 is provided with a stepped hole 43 at the position corresponding to the positioning hole 42. The stepped hole 43 and the positioning hole 42 together form a countersunk hole structure. The diameter of the stepped hole 43 is larger than the diameter of the positioning hole 42. The stepped hole 43 has a stepped surface. The annular groove 31 is provided on the stepped surface and surrounds the periphery of the positioning hole 42.

[0066] Please see Figure 2 and Figure 7 In one embodiment of this utility model, a cavity 11 is formed inside the housing 1. The housing 1 can be formed by splicing at least two outer shells, and the two outer shells together define the cavity 11 of the housing 1. One end of the cavity 11 is provided with an opening. The mounting part 2 is provided on the inner wall of the cavity 11. The rotating member 3 is housed in the cavity 11 and rotatably mounted on the mounting part 2. The traction structure includes two traction ropes, one end of which is connected to the rotating member 3 and is wound clockwise around the rotating member 3; the other end of which is connected to the rotating member 3 and is wound counterclockwise around the rotating member 3; the other ends of the two traction ropes respectively pass through the opening and are connected to both sides of the insertion part. By rotating the rotating member 3 in both directions, the corresponding traction rope is wound around the rotating member 3, thereby pulling the corresponding traction rope, and causing the insertion part to bend and deform towards the corresponding side.

[0067] Meanwhile, an elongated hole 12 communicating with the cavity 11 is provided on the housing 1; a lever 34 is provided on the rotating member 3, one end of the lever 34 extends out of the housing 1 from the elongated hole 12, and the lever 34 can reciprocate along the long axis of the elongated hole 12 within the elongated hole 12, so that the rotating member 3 can rotate forward and backward relative to the mounting part 2; by providing the lever 34, medical staff can realize the forward and reverse rotation of the rotating member 3 simply by moving the lever 34, which is convenient for medical staff to operate; and the setting of the elongated hole 12 will limit the formation of the lever 34, so that the rotating member 3 rotates within a predetermined angle, and avoids the rotating member 3 rotating at too large an angle.

[0068] This utility model also provides an endoscope, which includes a handle structure 100 for increasing traction rotation damping. It should be noted that the handle structure 100 for increasing traction rotation damping is configured as described above, thus including all the technical features of the aforementioned handle structure 100. Therefore, the endoscope also includes all the technical features of the aforementioned handle structure 100, and thus possesses all the technical effects brought about by these features, which will not be elaborated upon here.

[0069] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A handle structure for increasing the damping of rotational traction, characterized in that The handle structure for increasing the rotational damping during pulling comprises: a housing, which is provided with a mounting portion; and a rotating member, which is rotatably mounted on the mounting portion; wherein the mounting portion and the rotating member are at least partially in size difference in position, so that the mounting portion and the rotating member are at least partially in interference fit, so that a damping force can be formed between the rotating member and the mounting portion when the rotating member rotates relative to the mounting portion.

2. The handle structure of claim 1, wherein The handle structure for increasing the rotational damping during pulling comprises a positioning column and a positioning hole in plug fit, the positioning column can rotate in the axial direction of the positioning hole, and the positioning column and the positioning hole are at least partially in interference fit; one of the housing and the rotating member is provided with the positioning column, and the other is provided with the positioning hole; wherein the mounting portion comprises the positioning column or the positioning hole.

3. The handle structure of claim 2, wherein The positioning column has a relatively arranged connecting end and plug end in the axial direction, the plug end is inserted into the positioning hole, and the outer diameter of the positioning column and / or the inner diameter of the positioning hole are tapered in the direction from the connecting end to the plug end.

4. The handle structure of claim 3, wherein The outer diameter of the positioning column and the inner diameter of the positioning hole are tapered in the direction from the connecting end to the plug end, and the contraction amplitude of the outer diameter of the positioning column is smaller than that of the inner diameter of the positioning hole, so that the positioning column is in interference fit with the positioning hole at least at the plug end.

5. The handle structure of claim 2, wherein The positioning column is at least partially flexible, and / or the inner wall of the positioning hole is at least partially flexible, so that elastic deformation occurs under the contact pressure between the positioning column and the positioning hole.

6. The handle structure of claim 5, wherein The positioning column is arranged on the housing; The positioning hole is arranged on the rotating member, an annular groove is arranged on the periphery of the positioning hole, and an annular retainer is formed between the annular groove and the positioning hole, which is configured to elastically expand when the positioning hole and the positioning column are in interference fit.

7. The handle structure of claim 6, wherein The annular retainer is provided with a notch for locally segmenting the annular retainer.

8. The handle structure of claim 7, wherein The notch is arranged at least twice, and the two notches are distributed at intervals along the circumference of the annular retainer, so as to segment the annular retainer into at least two parts, both of which are deformed outwardly when the positioning column is inserted into the positioning hole.

9. The handle structure of claim 1, wherein A cavity is formed in the housing, the mounting portion is arranged on the inner wall of the cavity, and an elongated hole is arranged on the housing to communicate with the cavity; The rotating member is accommodated in the cavity and rotatably mounted on the mounting portion, a lever is arranged on the rotating member, one end of the lever extends out of the housing from the elongated hole, and the lever can reciprocate along the long axis of the elongated hole, so as to reversely rotate the rotating member relative to the mounting portion.

10. An endoscope characterized by comprising: The handle structure for increasing the rotational damping during pulling comprises any one of claims 1 to 9.

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