Connecting structure of passive bending section and shell, endoscope handle and endoscope

Abstract

The utility model provides a connecting structure of a passive bending section and a shell, an endoscope handle and an endoscope, and belongs to the technical field of endoscopes. The shell is provided with a mounting opening, the near end of the passive bending section is inserted into the shell through the mounting opening, and the passive bending section is coated with a first protective layer and a second protective layer; in the axial direction of the passive bending section, the length of the first protection layer is larger than that of the second protection layer, the second protection layer is arranged at the position, corresponding to the installation opening, of the passive bending section, and the second protection layer and the first protection layer are arranged in an overlapped mode. The first protective layer and the second protective layer are used for protecting the part, corresponding to the mounting opening, of the passive bending section, so that the hardness of the part of the passive bending section is improved, the possibility of stress concentration of the passive bending section is reduced, the situation that the structure of the passive bending section is damaged due to the stress concentration is avoided, and the service life of the passive bending section is prolonged. And the structural integrity of the passive bending section is maintained.

Description

Technical Field

[0001] The utility model belongs to the technical field of endoscopes, and in particular relates to a connection structure of a passive bending section and a shell, an endoscope handle and an endoscope. Background Art

[0002] As a medical diagnostic device, an endoscope can enter the body and take images of lesions, providing doctors with sufficient diagnostic information to treat diseases.

[0003] The endoscope includes an insertion portion and a shell, and the insertion portion extends into the shell. During the use of the endoscope, as the operator adjusts the operating posture of the endoscope, pulls out or inserts the insertion portion into the cavity, the structure of the connection between the insertion portion and the shell is easily damaged, affecting the normal use of the insertion portion. Utility Model Content

[0004] The purpose of the present application is to provide a connection structure between a passive bending section and a shell, an endoscope handle and an endoscope, so as to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application provides a connection structure between a passive bending segment and a shell, wherein the shell has an installation opening, the proximal end of the passive bending segment is inserted into the shell through the installation opening, and the passive bending segment is covered with a first protective layer and a second protective layer; along the axial direction of the passive bending segment, the length of the first protective layer is greater than the length of the second protective layer, the second protective layer is arranged at a position of the passive bending segment corresponding to the installation opening, and the second protective layer overlaps with the first protective layer.

[0007] In a second aspect, an embodiment of the present application provides an endoscope handle, comprising a connection structure between a passive bending section and a shell provided in the embodiment of the first aspect.

[0008] In a third aspect, an embodiment of the present application provides an endoscope, including the endoscope handle provided in the embodiment of the second aspect.

[0009] The technical solution provided by this application can achieve the following beneficial effects:

[0010] In the present application, the passive bending section is coated with a first protective layer and a second protective layer, and the two protective layers are overlapped to improve the strength of the outer protective layer of the passive bending section, so as to enhance the hardness of the passive bending section. In addition, the second protective layer is arranged at the portion of the passive bending section corresponding to the installation opening to improve the hardness of the passive bending section, thereby avoiding stress concentration in the passive bending section when the passive bending section contacts the edge of the installation opening during use, thereby causing damage to the passive bending section structure, and maintaining the structural integrity of the passive bending section. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 is an overall schematic diagram of a connection structure between a passive bending section and a housing provided in some embodiments of the present application;

[0013] Figure 2 About Figure 1 Detailed view of point A;

[0014] Figure 3 is a partial cross-sectional view of a connection structure between a passive bending section and a housing provided in some embodiments of the present application;

[0015] Figure 4 About Figure 3 Detail of point B;

[0016] Figure 5 About Figure 3 Detailed view of point C;

[0017] Figure 6 It is a schematic diagram of the cooperation between the connector and the shell body provided in some embodiments of the present application;

[0018] Figure 7 It is a partial structural schematic diagram of the shell body provided in some embodiments of the present application;

[0019] Figure 8 It is a partially disassembled schematic diagram of the connection structure between the passive bending section and the housing provided in some embodiments of the present application;

[0020] Fig. 9 It is a schematic diagram of the matching structure of the elastic sleeve and the nut provided in some embodiments of the present application.

[0021] In the figure: 100-shell, 110-shell body, 111-limiting groove, 120-elastic sheath, 121-installation opening, 130-nut, 200-passive bending section, 210-spiral slit, 310-first protective layer, 320-second protective layer, 400-connector, 410-plug-in protrusion, 411-first protrusion, 412-second protrusion. DETAILED DESCRIPTION

[0022] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0023] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0024] In the related art, the insertion part includes an active bending section and a passive bending section. The passive bending section is inserted into the shell of the endoscope and connected to the shell. The passive bending section has a certain elasticity and can bend when subjected to external force. However, during the use of the endoscope, the part where the passive bending section is connected to the shell is prone to damage.

[0025] The inventors have found that the shell has a higher structural strength and is harder than the passive bending section. During the use of the passive bending section, as the operating posture is adjusted, the insertion portion is inserted into or pulled out of the cavity, the position of the passive bending section will move, and stress concentration will easily occur at the connection position between the passive bending section and the shell. Since the hardness of the passive bending section is lower, the structure of the passive bending section is easily damaged.

[0026] In view of this, the present application embodiment provides a connection structure between a passive bending section and a housing, referring to Figures 1 to 8 As shown, by enhancing the hardness of the passive bending section 200 , the risk of damage to the passive bending section 200 is reduced.

[0027] The housing 100 refers to the housing 100 of the endoscope handle, which has a mounting opening 121, and the proximal end of the passive bending section 200 is inserted into the housing 100 through the mounting opening 121. The size of the mounting opening 121 is slightly larger than the size of the passive bending section 200, so that the passive bending section 200 can pass through the mounting opening 121. Therefore, the passive bending section 200 has a certain amount of margin in the mounting opening 121, which causes the passive bending section 200 to shift position under the action of external force and easily touch the edge of the mounting opening 121.

[0028] The passive bending section 200 is coated with a first protective layer 310 and a second protective layer 320. The first protective layer 310 and the second protective layer 320 are overlapped, and the length of the first protective layer 310 is greater than the length of the second protective layer 320. Figure 3 , Figure 4 and Figure 5 As shown. The length of the protective layer refers to its length in the axial direction of the passive bending segment 200. The protective layer can increase the hardness of the passive bending segment 200 and mitigate the impact of external forces on the passive bending segment 200. In the portion where the first protective layer 310 and the second protective layer 320 are overlapped, the total thickness of the outer protective layer of the passive bending segment 200 increases, and the strength of the protective layer also increases. Correspondingly, the two layers of protective layers have a stronger restraining effect on the passive bending segment 200, and the hardness of the passive bending segment 200 covered by the two layers of protective layers also increases. After the hardness of the passive bending segment 200 is increased, the structure of the passive bending segment 200 is not easily damaged.

[0029] In some embodiments of the present application, a second protective layer 320 of shorter length is disposed at a portion of the passive bending section 200 corresponding to the mounting opening 121. The portion of the passive bending section 200 corresponding to the mounting opening 121 refers to a portion of the passive bending section 200 that will abut against the edge of the mounting opening 121 under the action of an external force. The second protective layer 320 is used to cover this position, thereby increasing the hardness of the passive bending section 200 at this position, thereby preventing the passive bending section 200 from touching the mounting opening 121 during use, thereby preventing the passive bending section 200 from being damaged in structure. The structure of the passive bending section 200 can remain intact, which is beneficial to the normal use of the insertion portion.

[0030] In some embodiments of the present application, the first protective layer 310 generally covers the entire passive bending section 200, while the second protective layer 320 focuses on covering a section of the passive bending section 200 corresponding to the installation opening 121, thereby reducing the possibility of damage to the connection between the passive bending section 200 and the housing 100. The first protective layer 310 and the second protective layer 320 are generally made of the same material, and in specific implementations, heat shrinkable materials can be selected.

[0031] refer to Figure 1 and Figure 2As shown, in some embodiments of the present application, the shell 100 includes a shell body 110 and an elastic sheath 120. The hardness of the shell body 110 is greater than the hardness of the elastic sheath 120, and the shell body 110 is used for the operator to grasp to control the position movement of the endoscope handle. The elastic sheath 120 has a low hardness and a certain elasticity. When subjected to external impact, it can absorb at least part of the impact force while ensuring the integrity of the structure. The elastic sheath 120 is installed at the distal end of the shell body 110, and the installation opening 121 on the shell 100 is set on the elastic sheath 120, and the elastic sheath 120 is sleeved outside the passive bending section 200.

[0032] Since the elastic sheath 120 has a certain elasticity, after the elastic sheath 120 wraps the passive bending section 200, even if the passive bending section 200 is displaced and abuts against the elastic sheath 120 during use, the elastic sheath 120 can be deformed accordingly under the abutment of the passive bending section 200, absorbing the impact force caused by the passive bending section 200, thereby avoiding damage to the structure of the passive bending section 200 caused by this part of the impact force, and further avoiding the passive bending section 200 from being subjected to concentrated force. The elastic sheath 120 and the first protective layer 310 and the second protective layer 320 cooperate to protect the passive bending section 200, further reducing the risk of damage to the passive bending section 200 during use.

[0033] In some preferred embodiments, a portion of the second protective layer 320 is located inside the elastic sheath 120, and another portion is located outside the elastic sheath 120. Under such a layout, along the axial direction of the passive bending segment 200, the protective effect of the passive bending segment 200 is stepped down. The portion of the passive bending segment 200 located inside the elastic sheath 120 is protected by the elastic sheath 120, the first protective layer 310 and the second protective layer 320, and the portion of the passive bending segment 200 located outside the elastic sheath 120 and adjacent to the elastic sheath 120 is protected by the first protective layer 310 and the second protective layer 320. The protective effects of the passive bending segment 200 on both sides of the elastic sheath 120 are not too different, and stress concentration is not easy to occur at the boundary between the two, which can further avoid damage to the structure of the passive bending segment 200.

[0034] The length of the second protective layer 320 should not be too short. If the second protective layer 320 is too short, and the length of the second protective layer 320 outside the elastic sheath 120 is short, the interval between the pipe section of the passive bending section 200 protected by the elastic sheath 120, the first protective layer 310 and the second protective layer 320 and the pipe section of the passive bending section 200 protected only by the first protective layer 310 is close, and the passive bending section 200 is also prone to stress concentration. Therefore, in some preferred embodiments, combined with the size of the endoscope, the length of the part of the second protective layer 320 outside the elastic sheath 120 needs to be greater than or equal to one centimeter. While ensuring that stress concentration is not likely to occur between the passive bending section 200 and the mounting opening 121, it is also prevented that the passive bending section 200 located on the inner and outer sides of the elastic sheath 120 is structurally damaged due to excessive differences in the protection effect.

[0035] The second protective layer 320 is coated on the outside of the passive bending section 200, which will increase the radial size of the insertion part corresponding to this part of the passive bending section 200. However, in actual use, the size of the insertion part needs to be set as small as possible, so that it is convenient to insert the insertion part into the cavity and improve the smoothness of the insertion of the insertion part. Therefore, the length of the second protective layer 320 should not be too long. If the length of the second protective layer 320 is too long, the radial size of the insertion part will be increased, and the difficulty of insertion of the insertion part will be increased. In some preferred embodiments, the length of the second protective layer 320 is less than ten centimeters to avoid the existence of the second protective layer 320 affecting the insertion of the insertion part. During the use of the endoscope, a part of the insertion part close to the handle does not need to be inserted into the cavity, and the second protective layer 320 is set close to the handle of the endoscope. Therefore, by limiting the length of the second protective layer 320, the second protective layer 320 can be prevented from being inserted into the cavity.

[0036] The shell body 110 is usually divided into two parts, which is convenient for installing various devices inside the shell body 110. Corresponding to the structure of the shell body 110, the elastic sheath 120 and the shell body 110 are preferably detachably connected, so that the elastic sheath 120 can be connected to the shell body 110 after the shell body 110 is assembled. There are many ways of detachably connecting the elastic sheath 120 and the shell body 110, such as threaded connection, snap connection, plug-in connection, expansion connection and other connection methods. In some embodiments of the present application, a threaded connection is set between the elastic sheath 120 and the shell body 110. During the installation of the elastic sheath 120, the radial position of the elastic sheath 120 in the passive bending section 200 generally does not shift, which can avoid the elastic sheath 120 from touching the passive bending section 200 during the installation process, causing damage to the structure of the passive bending section 200.

[0037] The proximal end of the elastic sheath 120 is pressed against the distal end of the shell body 110, thereby sealing the gap at the connection between the two, preventing external impurities from entering the shell 100 from the gap and affecting the normal operation of various components inside the shell 100. In addition, after the elastic sheath 120 is pressed against the shell body 110, the position of the elastic sheath 120 is stable and not prone to deviation, which provides better support for the passive bending section 200. There are many ways to seal between the elastic sheath 120 and the shell body 110, which can be frosted sealing or compression sealing. After the elastic sheath 120 is pressed against the shell body 110, it is compressed, thereby sealing, and further stabilizing the position of the elastic sheath 120.

[0038] The threaded connection between the elastic sheath 120 and the shell body 110 can be that the shell body 110 is provided with threads and the elastic sheath 120 is sleeved on the component, or a component with threads is installed inside the shell body 110 and the elastic sheath 120 is threadedly connected to the component.

[0039] In some embodiments of the present application, a thread cut is provided on the passive bending section 200. Figures 3 to 5 As shown, the thread slit reduces the rigidity of the passive bending section 200, so that the passive bending section 200 can bend following the active bending section. The proximal end of the thread slit on the passive bending section 200 is located inside the elastic sheath 120, and is covered by the elastic sheath 120, the first protective layer 310, and the second protective layer 320. Compared with other positions, the proximal end of the thread slit has a lower structural strength and is more prone to deformation. Setting the proximal end of the thread slit inside the elastic sheath 120 can further reduce the bending deformation of the passive bending section 200, and further reduce the deformation of the proximal end of the thread slit, which is beneficial to reduce or prevent stress concentration and structural damage in this part of the passive bending section 200.

[0040] The first protective layer 310 and the second protective layer 320 are overlapped. In some embodiments, the second protective layer 320 may be coated outside the first protective layer 310. In other embodiments, the first protective layer 310 may be coated outside the second protective layer 320. Since the first protective layer 310 is longer and the second protective layer 320 is shorter, it is better for the first protective layer 310 to be coated outside the second protective layer 320. Figure 4 As shown, the first protective layer 310 can be used to protect the second protective layer 320 to prevent the second protective layer 320 from being damaged and causing delamination between the second protective layer 320 and the first protective layer 310 .

[0041] The passive bending section 200 is provided with a connector 400 on the outer fixing sleeve, and the connector 400 is fixed to the shell 100 to complete the fixation of the passive bending section 200 and the shell 100. Specifically, part of the connector 400 is located in the shell body 110, and part is located in the elastic sheath 120. The proximal end of the connector 400 is provided with a plug-in protrusion 410, and the shell body 110 has a limiting groove 111 corresponding to the plug-in protrusion 410. The plug-in protrusion 410 is installed in the limiting groove 111, so that the connector 400 is limitedly matched with the shell body 110 in its circumferential and axial directions, so as to avoid the connector 400 from deviating from its preset position in the shell body 110, which affects the position stability of the passive bending section 200.

[0042] In some specific embodiments, the plug-in protrusion 410 has a first protrusion 411 and a second protrusion 412. The first protrusion 411 can cooperate with the shell body 110 at its circumferential upper limit position, and the second protrusion 412 can cooperate with the shell body 110 at its axial upper limit position, refer to Figure 6 and Figure 8 Corresponding to the structure of the plug-in protrusion 410, the limiting groove 111 on the shell body 110 is also divided into two parts, see Figure 7 As shown. Exemplarily, the first protrusion 411 has at least one edge, so as to prevent it from rotating in the limiting groove 111. The groove wall of part of the limiting groove 111 and the second protrusion 412 are arranged along the axial direction of the connector 400, and the groove wall of the limiting groove 111 is located outside the shell body 110 compared with the second protrusion 412, so as to prevent the second protrusion 412 from moving toward the outside of the shell body 110 along the axial direction of the connector 400.

[0043] The cooperation between the plug-in protrusion 410 and the limiting groove 111 can not only realize the stable connection between the connector 400 and the shell body 110, but also facilitate the confirmation of the installation position of the connector 400 on the shell body 110, thereby improving the convenience of assembly.

[0044] In order to ensure a stable connection between the connector 400 and the shell body 110, the connector 400 is generally made of a material with higher hardness. The connector 400 is sleeved outside the passive bending section 200. When the passive bending section 200 moves or bends, a stress concentration area will appear between the passive bending section 200 and the connector 400. In some embodiments of the present application, in order to avoid this situation, the connector 400 and the part of the passive bending section 200 located outside the connector 400 and adjacent to the connector 400 can be wrapped with an elastic sheath 120, thereby preventing the part of the passive bending section 200 from moving relative to the connector 400. The distance between the connector 400 and the mounting opening 121 on the elastic sheath 120 needs to be set longer, thereby increasing the length of the passive bending section 200 covered by the elastic sheath 120. Preferably, the length of the portion of the second protective layer 320 located inside the connector 400 is smaller than the length of the portion of the second protective layer 320 located inside the elastic sheath 120 and outside the connector 400, refer to Figure 3 and Figure 5 shown.

[0045] Since the shell body 110 is fixed to the connector 400, in some preferred embodiments, a thread can be provided at the distal end of the connector 400, and the connector 400 is threadedly connected to the elastic sheath 120, thereby realizing a detachable connection between the elastic sheath 120 and the shell body 110. Since the elastic sheath 120 is elastic, in order to avoid the stability of the threaded connection between the elastic sheath 120 and the connector 400, in some embodiments of the present application, a nut 130 is fixedly installed in the elastic sheath 120, referring to Figure 8 and Fig. 9 As shown, the nut 130 is threadedly connected to the connector 400 to achieve threaded connection between the elastic sheath 120 and the shell body 110 .

[0046] The hardness of the nut 130 is greater than that of the elastic sheath 120, and the nut 130 has a poor stress absorption effect. In order to avoid the existence of the nut 130 affecting the protection and buffering effect of the elastic sheath 120 on the passive bending section 200, the axial length of the nut 130 should not be too long. Specifically, along the axial direction of the passive bending section 200, the length of the portion of the second protective layer 320 located inside the nut 130 is less than the length of the portion of the second protective layer 320 located inside the elastic sheath 120 and outside the nut 130. Figure 3 and Figure 5 shown.

[0047] An embodiment of the present application further provides an endoscope handle, comprising a connection structure between the passive bending section 200 and the housing 100 provided in any of the above embodiments.

[0048] The embodiment of the present application also provides an endoscope, including the endoscope handle provided in any of the above embodiments. The endoscope in the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiment of the present application does not specifically limit the type of the endoscope.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A connection structure between a passive bending section and a housing, characterized in that: The housing (100) has an installation opening (121), the proximal end of the passive bending section (200) is plugged into the housing (100) through the installation opening (121), and the passive bending section (200) is coated with a first protective layer (310) and a second protective layer (320); Along the axial direction of the passive bending section (200), the length of the first protective layer (310) is greater than the length of the second protective layer (320), the second protective layer (320) is arranged at a position of the passive bending section (200) corresponding to the installation opening (121), and the second protective layer (320) and the first protective layer (310) are arranged to overlap.

2. The connection structure between a passive bending section and a housing according to claim 1, characterized in that: The shell (100) comprises a shell body (110) and an elastic sheath (120), wherein the elastic sheath (120) is installed at the distal end of the shell body (110), the installation opening (121) is arranged on the elastic sheath (120), and the elastic sheath (120) is sleeved outside the passive bending section (200).

3. The connection structure between a passive bending section and a housing according to claim 2, characterized in that: A portion of the second protective layer (320) is located inside the elastic sheath (120), and another portion is located outside the elastic sheath (120).

4. The connection structure of a passive bending section and a housing according to claim 3, characterized in that: The length of the portion of the second protective layer (320) located outside the elastic sheath (120) is greater than or equal to one centimeter, and / or the length of the portion of the second protective layer (320) located outside the elastic sheath (120) is less than ten centimeters.

5. The connection structure of a passive bending section and a housing according to claim 2, characterized in that: The elastic sheath (120) is threadedly connected to the shell body (110), and the proximal end of the elastic sheath (120) is tightly sealed against the distal end of the shell body (110); And / or, the passive bending section (200) has a spiral slit (210), and the proximal end of the spiral slit (210) is located inside the elastic sheath (120).

6. The connection structure of a passive bending section and a housing according to claim 2, characterized in that: The passive bending section (200) is provided with a connecting head (400) outside the fixed sleeve, and the connecting head (400) is partially located in the shell body (110) and partially located in the elastic sheath (120); The proximal end of the connector (400) is provided with an inserting protrusion (410), the shell body (110) has a limiting groove (111) corresponding to the inserting protrusion (410), and the inserting protrusion (410) is installed in the limiting groove (111) so that the connector (400) is limitedly matched with the shell body (110) in its circumferential and axial directions; Along the axial direction of the passive bending section (200), the length of the portion of the second protective layer (320) located inside the connector (400) is smaller than the length of the portion of the second protective layer (320) located inside the elastic sheath (120) and outside the connector (400).

7. The connection structure of a passive bending section and a housing according to claim 6, characterized in that: A nut (130) is fixedly installed inside the elastic sheath (120), a thread is provided at the distal end of the connector (400), and the nut (130) is threadedly sleeved outside the connector (400); Along the axial direction of the passive bending section (200), the length of the portion of the second protective layer (320) located inside the nut (130) is smaller than the length of the portion of the second protective layer (320) located inside the elastic sheath (120) and outside the nut (130).

8. The connection structure of a passive bending section and a housing according to claim 1, characterized in that: The first protective layer (310) is sleeved outside the second protective layer (320).

9. An endoscope handle, characterized in that: It comprises a connection structure between a passive bending section and a shell as described in any one of claims 1 to 8.

10. An endoscope, characterized in that: An endoscope handle comprising the one described in claim 9.

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