Sheath tube member, negative pressure connection nozzle mounting assembly, and endoscope

Abstract

Disclosed in the present application are a sheath tube member, a negative pressure connection nozzle mounting assembly, and an endoscope, which relate to the technical field of medical devices. Two ends of the sheath tube member are configured as a hollow-through structure, and a first limiting structure is provided in the sheath tube member. The first limiting structure is used for limiting a rotation angle of a negative pressure connection nozzle when the negative pressure connection nozzle is sleeved inside the sheath tube member. In addition, the sheath tube member is further provided with a first positioning structure for cooperating with a housing. The sheath tube member can be fixed relative to the housing, and axial swinging of the negative pressure connection nozzle sleeved inside the sheath tube member can be reduced under the limitation of the sheath tube member. In addition, even if the negative pressure connection nozzle swings axially, it can be absorbed by a surface of a sheath, thereby reducing the force transmitted by the negative pressure connection nozzle to the housing during swinging, and further avoiding or reducing the possibility of the housing being pushed away during swinging of the negative pressure connection nozzle.

Description

Sheath fittings, negative pressure connector mounting assembly and endoscope Technical Field

[0001] This application relates to the field of medical device technology, and in particular to sheath fittings, negative pressure connector mounting assemblies, and endoscopes. Background Technology

[0002] In endoscopes with negative pressure connection nozzles, the negative pressure connection nozzles are used to connect to external negative pressure lines and work in conjunction with the instrument channels in the endoscope to aspirate lesions from the patient's body.

[0003] Some existing endoscopes have the ability to rotate the negative pressure connector, which allows adjustment of the orientation and placement of the negative pressure tubing. Considering the interference between the negative pressure connector and other structures (such as buttons and wiring harnesses), it is usually necessary to limit its rotation range. In related technologies, such as JP2023143421A, corresponding limit and anti-rotation structures are set on the negative pressure connector and the handle housing, respectively.

[0004] However, due to the setting of the limiting anti-rotation structure, in the existing scheme of preventing the negative pressure connecting nozzle from rotating through the handle shell, the handle shell is easily pushed open. This is not only inconvenient for the operator to use, but also poses a risk to the patient undergoing surgery. Utility Model Content

[0005] This application discloses a sheath fitting, a negative pressure connector mounting assembly, and an endoscope to at least partially improve the aforementioned technical problems.

[0006] To solve the above problems, this application adopts the following technical solution:

[0007] On one hand, this application provides a sheath fitting with both ends of the sheath fitting through for fitting around the outer periphery of a negative pressure connector. A first limiting structure is provided inside the sheath fitting to limit the rotation angle of the negative pressure connector inside the sheath fitting. The sheath fitting is also provided with a first positioning structure for cooperating and fixing with the outer shell.

[0008] In another aspect, embodiments of this application also provide an endoscope, including the negative pressure connection nozzle mounting assembly as described above.

[0009] The technical solution adopted in this application can achieve the following beneficial effects:

[0010] The sheath fitting provided in this application embodiment features through-hole structures at both ends and a first limiting structure within it. This first limiting structure limits the rotation angle of the negative pressure connector when it is fitted inside the sheath fitting. The sheath fitting also includes a first positioning structure for engaging with the outer shell. The sheath fitting can be fixed relative to the outer shell. The negative pressure connector fitted inside the sheath fitting experiences reduced axial sway due to the constraint provided. Even if axial sway occurs, the sheath fitting increases the constraint area in the axial sway direction, allowing the force generated in this direction to be absorbed by the surface of the sheath fitting. This reduces the force transmitted to the outer shell during swaying, thus preventing or reducing the possibility of the outer shell being pushed open during the swaying of the connector. Applying the aforementioned sheath fitting to negative pressure connector mounting assemblies and endoscopes can similarly solve the aforementioned problems. Attached Figure Description

[0011] Figure 1 shows a schematic diagram of the structure of an endoscope according to an embodiment of this application.

[0012] Figure 2 shows an exploded view of a negative pressure connector mounting assembly according to an embodiment of this application.

[0013] Figure 3 shows a partial structural schematic diagram of a negative pressure connector mounting assembly according to an embodiment of this application.

[0014] Figure 4 is an enlarged view of point A in Figure 3.

[0015] Figure 5 shows a schematic diagram of the structure of a negative pressure connector in a negative pressure connector mounting assembly according to an embodiment of this application.

[0016] Figure 6 shows a structural schematic diagram of a negative pressure connector in a negative pressure connector mounting assembly according to an embodiment of this application from another perspective.

[0017] Figure 7 shows a schematic diagram of the structure of a sheath fitting according to an embodiment of this application.

[0018] Figure 8 shows a structural schematic diagram of a sheath fitting from another perspective in one embodiment of this application.

[0019] In the diagram: 1. Endoscope; 10. Negative pressure connector mounting assembly; 110. Negative pressure connector; 111. Second limiting structure; 112. Fourth limiting structure; 120. Sheath fitting; 122. First limiting structure; 123. First positioning structure; 124. Third positioning structure; 130. Outer shell; 131. First housing; 1311. First structural part; 1312. Second structural part; 132. Second housing; 133. Mounting cavity; 134. Second positioning structure; 135. Fourth positioning structure; 137. Third limiting structure; 20. Wiring harness. Detailed Implementation

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] In various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the usage environment. 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".

[0022] The inventive concept of this application is described here:

[0023] In endoscopes with negative pressure connection nozzles, the negative pressure connection nozzles are used to connect to external negative pressure lines and work in conjunction with the instrument channels in the endoscope to aspirate lesions from the patient's body.

[0024] Some existing endoscopes have the ability to rotate the negative pressure connector, which allows adjustment of the orientation and placement of the negative pressure tubing. Considering the interference between the negative pressure connector and other structures (such as buttons and wiring harnesses), it is usually necessary to limit its rotation range. In related technologies, such as JP2023143421A, corresponding limit and anti-rotation structures are set on the negative pressure connector and the handle housing, respectively.

[0025] However, due to the setting of the limiting anti-rotation structure, in the existing scheme of preventing the negative pressure connecting nozzle from rotating through the handle shell, the handle shell is easily pushed open. This is not only inconvenient for the operator to use, but also poses a risk to the patient undergoing surgery.

[0026] The inventors discovered that the handle shell is easily pushed open mainly because the negative pressure connector is in direct contact with the handle shell. During the rotation of the handle shell, the point of contact between the negative pressure connector and the handle shell is used as a fulcrum. The negative pressure connector and the handle shell form a lever structure, so the handle shell is easily pushed open during the rotation of the negative pressure connector.

[0027] Based on this, the inventor proposed to eliminate the aforementioned lever structure or reduce the impact of the aforementioned lever structure on the handle shell, which would solve the aforementioned problem. Therefore, the inventor proposed a protective sleeve fitting, which is fitted around the outer periphery of the negative pressure connector, so that the force transmitted from the negative pressure connector to the handle shell is absorbed and dispersed by the protective sleeve fitting. This can avoid or reduce the possibility that the negative pressure connector will push the handle shell open during rotation.

[0028] The following detailed description, in conjunction with Figures 1 to 8, of the sheath fitting 120, the negative pressure connector mounting assembly 10, and the endoscope 1 provided in this application, through specific embodiments and application scenarios, will be provided in detail.

[0029] Please refer to Figures 1-3 simultaneously. This application embodiment provides an endoscope 1, which may include a negative pressure connection nozzle mounting assembly 10 and a wiring harness 20 for connecting external devices such as a monitor, processor, etc. It should be noted that the endoscope 1 involved in the embodiments of this application may be a bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral endoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc. This application embodiment does not specifically limit the type of endoscope.

[0030] The negative pressure connector mounting assembly 10 may include a sheath fitting 120, a negative pressure connector 110, and a housing 130. The wiring harness 20 can pass through the housing 130 and partially extend beyond it for connection to external equipment. An mounting cavity 133 is formed inside the housing 130. The negative pressure connector 110 is rotatably fitted inside the sheath fitting 120 and positioned within the mounting cavity 133. A portion of the negative pressure connector 110 extends beyond the mounting cavity 133 for connection to external negative pressure equipment. In this embodiment, the sheath fitting 120 is located within the mounting cavity 133 and fixedly connected to the housing 130, used to constrain the swing of the negative pressure connector 110. It should be noted that this constraint can be understood as a partial restriction, such as reducing the swing amplitude of the negative pressure connector 110.

[0031] Specifically, please refer to Figures 2 and 3 simultaneously. In this embodiment, the outer shell 130 may include a first shell 131 and a second shell 132 that are detachably connected. The first shell 131 and the second shell 132 are spliced ​​together to form an installation cavity 133. The first shell 131 and the second shell 132 can also be spliced ​​together to form a third limiting structure 137. The third limiting structure 137 can be used to restrict the extension and retraction of the negative pressure connecting nozzle 110 relative to the outer shell 130. This can prevent the negative pressure connecting nozzle 110 from being pulled out of the outer shell 130 and also prevent the negative pressure connecting nozzle 110 from detaching from the sheath fitting 120.

[0032] Please refer to Figures 4-6 simultaneously. Correspondingly, in one embodiment, the negative pressure connector 110 may be provided with a fourth limiting structure 112 that cooperates with the third limiting structure 137. This application does not limit the specific form of the third limiting structure 137 and the fourth limiting mechanism. For example, in one embodiment, the third limiting structure 137 may be a limiting hole, and the fourth limiting structure 112 may be a limiting groove. The limiting groove on the negative pressure connector 110 may be embedded in the limiting hole of the housing 130 to limit the axial movement of the negative pressure connector 110 relative to the limiting hole.

[0033] It should be noted that the embodiments of this application do not limit the formation method of the limiting groove. For example, in one embodiment, the limiting groove can be formed by a surface recess of the negative pressure connecting nozzle 110. In another embodiment, the limiting groove can be formed by the area between two protrusions on the surface of the negative pressure connecting nozzle 110. Furthermore, in this embodiment, the aforementioned two protrusions can be movably disposed relative to the surface of the negative pressure connecting assembly. For example, during the installation of the negative pressure connecting nozzle 110, the protrusions that need to be placed in the mounting cavity 133 can be fixed first. After the negative pressure connecting nozzle 110 is installed in the housing 130, the protrusions located outside the mounting cavity 133 can be fixed. This can make the connection between the negative pressure connecting nozzle 110 and the housing 130 tighter, thereby reducing the probability of the negative pressure connecting nozzle 110 swinging. The specific method can be set according to the actual situation.

[0034] Please refer to Figures 4, 7, and 8 simultaneously. The sheath fitting 120 can be configured as a structure with both ends open, and a first limiting structure 122 can be provided inside the sheath fitting 120. The first limiting structure 122 can be used to limit the rotation angle of the negative pressure connector 110 within the sheath fitting 120. Correspondingly, one end of the negative pressure connector 110 can be provided with a second limiting structure 111 that cooperates with the first limiting structure 122. It should be noted that the embodiment itself does not limit the specific form of the first limiting structure 122 and the second limiting structure 111. For example, in this embodiment, both the first limiting structure 122 and the second limiting structure 111 can be limiting blocks. When the two limiting blocks abut together, they can play a limiting role. At this time, the negative pressure connector 110 cannot continue to rotate in one direction, but can only rotate in the opposite direction to the previous rotation direction, so as to achieve a limiting effect in one rotation direction.

[0035] In a more specific embodiment, during the rotation of the negative pressure connector 110 relative to the housing 130, the distal end of the negative pressure connector 110 always faces away from the wire harness 20 extending from the housing 130, thus avoiding interference from the wire harness 20 to the negative pressure connector 110. That is, in this embodiment, during the rotation of the negative pressure connector 110 relative to the housing 130, the area swept by the distal end of the negative pressure connector 110 does not coincide with the area where the wire harness 20 is located. For example, in this embodiment, the rotation angle of the negative pressure connector 110 relative to the housing 130 can be 180°. When the first limiting structure 122 and the second limiting structure 111 limit the negative pressure connector 110, the proximal end of the negative pressure connector 110 can face away from the surface of the first housing 131 and away from the surface of the second housing 132. Alternatively, when the first limiting structure 122 and the second limiting structure 111 limit the negative pressure connector 110, the proximal end of the negative pressure connector 110 faces away from the surface of the second housing 132 and away from the surface of the first housing 131.

[0036] As mentioned above, in one embodiment, the sheath fitting 120 may be provided with a first positioning structure 123 for cooperating with the outer shell 130, and the sheath fitting 120 may be fixed to the outer shell 130 by the first positioning structure 123. Correspondingly, in one embodiment, the outer shell 130 may have a second positioning structure 134. Specifically, the second positioning structure 134 may be provided on the first shell 131 and the second shell 132. This application embodiment does not limit the specific form of the first positioning structure 123 and the second positioning structure 134. For example, in one embodiment, the first positioning structure 123 may be a sheet-like structure and protrude from the outer surface of the sheath fitting 120. The second positioning structure 134 may also be a sheet-like structure. When the sheath fitting 120 is fixed to the outer shell 130, the first positioning structure 123 may be sandwiched between the two second positioning structures 134 to achieve relative fixation between the sheath fitting 120 and the outer shell 130.

[0037] Please refer to Figures 7 and 8. As mentioned above, the first positioning structure 123 protrudes from the outer surface of the sheath fitting 120, and the first limiting structure 122 protrudes from the inner surface of the sheath fitting 120. During the process of stopping the sheath fitting 120, the first limiting structure 122 will be subjected to dynamic load, and at this time, the first limiting structure 122 will be subjected to a large force. In one embodiment, the first positioning structure 123 and the second positioning structure 134 can be arranged opposite to each other on the inner and outer surfaces of the sheath fitting 120. This allows the sheath fitting 120 to have a larger cross-sectional area at that section, thereby enabling the sheath fitting 120 to withstand a larger force at this section. This can prevent the sheath fitting 120 from transmitting too much force to the outer shell 130, thereby avoiding or reducing the possibility of the outer shell 130 being pushed open.

[0038] Furthermore, referring again to Figure 4, in one embodiment, the interior of the first housing 131 may further include a first structural portion 1311 and a second structural portion 1312. The extending directions of the first structural portion 1311 and the second structural portion 1312 may intersect, for example, on a plane perpendicular to the plane where the first housing 131 and the second housing 132 are joined. This application does not limit the specific shape of the first structural portion 1311 and the second structural portion 1312; for example, they may be support plate-like structures or arc plate-like structures, etc., and can be specifically configured according to actual conditions. The second positioning structure 134 may be connected to the first structural portion 1311 and also connected to the second structural portion 1312.

[0039] As mentioned above, since the first positioning structure 123 will be subjected to a large force during the process of stopping the sheath fitting 120, the second positioning structure 134 will also be subjected to a large force transmitted by the first positioning structure 123. The aforementioned arrangement of the second positioning structure 134 can make the second positioning structure 134 and the first housing 131 more tightly connected, thereby avoiding or reducing the possibility of damage to the second positioning structure 134. At the same time, the structure of the aforementioned second structural part 1312 can also increase the contact area between it and the first housing 131, thereby distributing the force transmitted by the second structural part 1312 to the first housing 131, thereby reducing the magnitude of the force received locally by the housing, and thus avoiding or reducing the possibility of the outer shell 130 being pushed open.

[0040] It is understandable that, similarly, the interior of the second housing 132 can also have a first structural part 1311 and a second structural part 1312, and the cooperation method between the first positioning structure 123 and the second housing 132 can be referred to the cooperation method between the first positioning structure 123 and the first housing 131, which will not be elaborated here.

[0041] Please refer to Figures 2, 7, and 8 simultaneously. Furthermore, in one embodiment, the outer surface of the sheath fitting 120 may also be provided with a third positioning structure 124, which can also be used to fix it to the outer casing 130. Correspondingly, in one embodiment, the outer casing 130 may have a fourth positioning structure 135 that matches the third positioning structure 124.

[0042] As mentioned above, in this embodiment, the first positioning structure 123 and the second positioning structure 134 can position the sheath tube 120 and the outer shell 130 in the first direction, while the third positioning structure 124 and the fourth positioning structure 135 can position the sheath tube 120 and the outer shell 130 in the second direction. The first direction and the second direction have an angle between them, which makes the positioning of the sheath tube 120 and the outer shell 130 more comprehensive, thereby improving the stability of the connection between the sheath tube 120 and the outer shell 130. Since the negative pressure connecting nozzle 110 is sleeved inside the sheath tube 120, the aforementioned structure makes it more difficult for the negative pressure connecting nozzle 110 to push open the outer shell 130.

[0043] It is understood that the embodiments of this application do not limit the specific forms of the third positioning structure 124 and the fourth positioning structure 135. For example, in one embodiment, the third positioning structure 124 and the fourth positioning structure 135 can be in a pin-hole fit, that is, the third positioning structure 124 can be a positioning pin, and the fourth positioning structure 135 can be a positioning hole. It should be noted that the embodiments of this application do not limit the specific number of the third positioning structure 124 and the fourth positioning structure 135. Therefore, in some embodiments, some of the third positioning structures 124 can be positioning pins, and the matching fourth positioning structures 135 can be positioning holes; other parts of the third positioning structures 124 can be positioning holes, and the matching fourth positioning structures 135 can be positioning pins. The specific configuration can be determined according to the actual situation.

[0044] In summary, the sheath fitting 120 provided in this application embodiment is configured with both ends of the sheath fitting 120 as through structures, and a first limiting structure 122 is provided inside the sheath fitting 120. The first limiting structure 122 is used to limit the rotation angle of the negative pressure connecting nozzle 110 when it is sleeved inside the sheath fitting 120. The sheath fitting 120 is also provided with a first positioning structure 123 for cooperating with the outer shell 130. The sheath fitting 120 can be fixed relative to the outer shell 130. The negative pressure connector 110, which is sleeved inside the sheath fitting 120, can reduce axial swing under the constraint of the sheath fitting 120. Even if the negative pressure connector 110 swings axially, the sheath fitting 120 can increase the constraint area in the axial swing direction of the negative pressure connector 110. Therefore, the force generated in the axial swing direction of the negative pressure connector 110 can also be absorbed by the surface of the sheath fitting 120, thereby reducing the force transmitted to the outer shell 130 by the negative pressure connector 110 during the swing. In other words, in this embodiment, the contact area between the negative pressure connector 110 and the sheath fitting 120 during the swing is larger than the contact area between the negative pressure connector 110 and the outer shell 130. This can reduce the influence of the aforementioned lever structure on the outer shell 130, thereby avoiding or reducing the possibility that the outer shell 130 will be pushed open during the swing of the negative pressure connector 110. The aforementioned sheath fitting 120 can also solve the aforementioned problem when applied to the negative pressure connection nozzle mounting assembly 10 and the endoscope 1.

Claims

1. A sheathed pipe fitting for a negative pressure connection nozzle, characterized in that, The sheath fitting has two through ends and is used to fit around the outer periphery of the negative pressure connector. A first limiting structure is provided inside the sheath fitting to limit the rotation angle of the negative pressure connector inside the sheath fitting. The sheath fitting is also provided with a first positioning structure for cooperating and fixing with the outer shell.

2. The sheathed fitting according to claim 1, characterized in that, The first positioning structure is disposed on the outer surface of the housing and is used to cooperate with and fix the housing in a first direction; And / or, the outer surface of the sheath fitting is further provided with a third positioning structure, which is used to cooperate with the outer shell for fixation in the second direction.

3. The sheathed pipe fitting according to claim 2, characterized in that, The first positioning structure is disposed on the outer surface of the housing and is used to cooperate with the housing in a first direction for fixation. The outer surface of the sheath fitting is also provided with a third positioning structure, which is used to cooperate with the housing in a second direction for fixation. The first direction and the second direction have an included angle.

4. The sheathed pipe fitting according to any one of claims 1-3, characterized in that, The first limiting structure protrudes from the inner surface of the sheath fitting, and the first positioning structure protrudes from the outer surface of the sheath fitting. The first limiting structure and the first positioning structure are disposed opposite to each other on the inner and outer surfaces of the sheath fitting.

5. A negative pressure connector mounting assembly, characterized in that, include: The negative pressure connector and the sheath fitting as described in any one of claims 1-4, wherein one end of the negative pressure connector is rotatably sleeved inside the sheath fitting, and one end of the negative pressure connector is provided with a second limiting structure that cooperates with the first limiting structure.

6. The negative pressure connector mounting assembly according to claim 5, characterized in that, The negative pressure connector also has a fourth limiting structure, which is used to cooperate with the outer shell and restrict the extension and retraction of the negative pressure connector relative to the outer shell.

7. The negative pressure connector mounting assembly according to claim 6, characterized in that, The negative pressure connector mounting assembly further includes: a housing, the housing comprising: a first housing and a second housing that are disposed opposite to each other and detachably connected, the first housing and the second housing being spliced ​​together to form an mounting cavity and a third limiting structure that cooperates with the fourth limiting structure; Both the first housing and the second housing are provided with a second positioning structure that cooperates with the first positioning structure. The first positioning structure is disposed on the outer surface of the sheath fitting and extends in a first direction. The first positioning structure abuts against and is sandwiched between the two second positioning structures. The sheath fitting is disposed in the mounting cavity, and a third positioning structure is also provided on the outer surface of the sheath fitting; The other end of the negative pressure connector extends out of the mounting cavity. The first housing and / or the second housing are provided with a fourth positioning structure that matches the third positioning structure. The third positioning structure and the fourth positioning structure are engaged by pin holes.

8. The negative pressure connector mounting assembly according to claim 7, characterized in that, The first housing has a first structural part and a second structural part inside. The first structural part and the second structural part are intersecting on the splicing surface perpendicular to the first housing and the second housing. The second positioning structure is connected to the first structural part and the second structural part.

9. The negative pressure connector mounting assembly according to claim 7, characterized in that, When the housing is provided with a wire harness extending out of the housing, during the rotation of the negative pressure connector, the distal end of the negative pressure connector moves away from the wire harness extending out of the housing. When the first limiting structure and the second limiting structure limit the negative pressure connector, the proximal end of the negative pressure connector is away from the surface of the first housing and away from the surface of the second housing; or, when the first limiting structure and the second limiting structure limit the negative pressure connector, the proximal end of the negative pressure connector is away from the surface of the second housing and away from the surface of the first housing.

10. An endoscope, characterized in that, Includes the negative pressure connector mounting assembly as described in any one of claims 5-9.

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