Access assembly for receiving an endoscope

Abstract

An access assembly for receiving an endoscope is provided, the access assembly comprising: a cannula having an internal lumen configured to receive the endoscope; a distal seal configured to sealingly connect with a distal end of the cannula; a fluid inflow channel configured to receive fluid from a fluid source; and a fluid ejection structure located in the internal lumen, connected to the fluid inflow channel, the fluid ejection structure having a bidirectional jet, the bidirectional jet comprising a first jet and a second jet, the second jet being directed toward the distal seal, the first jet being directed in an opposite direction from the second jet, the bidirectional jet configured to eject fluid to clean the endoscope and the distal seal.

Description

Technical Field

[0001] This utility model relates to an access component for receiving an endoscope. Background Technology

[0002] In laparoscopic surgery, a trocar is used to create a passage, through which the endoscope enters the abdominal wall to obtain a view of the surgical area. This passage also allows other instruments that meet the requirements for trocar use to pass through. However, during the procedure, the endoscope lens may be obscured by aggregates, tissues, blood, or other bodily fluids within the body cavity, resulting in a loss of or blurred surgical vision. Utility Model Content

[0003] At least one embodiment of the present invention provides an access component for receiving an endoscope, so as to clean the distal seal while cleaning the endoscope lens.

[0004] An embodiment of this utility model provides an access component for receiving an endoscope, comprising: a cannula having an inner cavity configured to receive the endoscope; a distal seal configured to be sealingly connected to the distal end of the cannula; a fluid inflow channel configured to receive fluid from a fluid source; and a fluid ejection structure located in the inner cavity and connected to the fluid inflow channel, the fluid ejection structure having a bidirectional nozzle, the bidirectional nozzle including a first nozzle and a second nozzle, the second nozzle facing the distal seal, the first nozzle facing away from the second nozzle, the bidirectional nozzle being configured to eject fluid to clean the endoscope and the distal seal.

[0005] For example, the fluid ejection structure further includes a fluid channel, the inlet end of which is connected to the fluid inflow channel, and the outlet end of which extends into the inner cavity and is connected to the first nozzle and the second nozzle respectively. In the axial direction of the access component, the first nozzle is located at the distal end of the inlet end of the fluid channel.

[0006] For example, the fluid channel includes a main body portion that is inclined relative to the central axis of the sleeve.

[0007] For example, the angle between the main body portion and the cross section perpendicular to the central axis of the sleeve is greater than 30° and less than or equal to 60°.

[0008] For example, the fluid ejection structure is disposed close to the distal seal, and there is a gap between the second nozzle and the distal seal.

[0009] For example, the size of the gap is less than half the inner diameter of the sleeve.

[0010] For example, the central axes of the first nozzle and the second nozzle coincide, the central axes of the first nozzle and the second nozzle coincide with the central axis of one of the sleeve and the distal seal, or the central axis of the first nozzle coincides with the central axis of the sleeve and the central axis of the second nozzle coincides with the central axis of the distal seal.

[0011] For example, the fluid ejection structure further includes a first sidewall and a second sidewall, which are respectively disposed on both sides of the fluid channel. The first sidewall and the second sidewall extend from the inner wall of the sleeve to the central axis of the inner cavity, and the bidirectional nozzle is disposed at the intersection of the first sidewall and the second sidewall.

[0012] For example, the angle formed by the first sidewall and the second sidewall ranges from 20° to 90°.

[0013] For example, connecting components are provided between the fluid channel and the first sidewall and between the fluid channel and the second sidewall, respectively. The thickness of the first sidewall is greater than the thickness of the connecting component, and the thickness of the second sidewall is greater than the thickness of the connecting component. The first sidewall, the second sidewall, and / or the connecting component are made of soft materials. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0015] Figure 1 A cross-sectional side view of the access component of a puncture device provided for an embodiment of this utility model.

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0017] Figure 3 and Figure 4 A three-dimensional schematic diagram of the fluid ejection structure in the access component provided for an embodiment of this utility model.

[0018] Figure 5 A three-dimensional schematic diagram of the fluid ejection structure and the distal seal in the access component provided for an embodiment of this utility model.

[0019] Figure 6 A schematic diagram of fluid flow direction in the access component provided for an embodiment of this utility model.

[0020] Figure 7A schematic diagram of the path of fluid ejected from the bidirectional nozzle in the access component provided in an embodiment of this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0023] Currently, there is a type of trocar that can perform cleaning (hereinafter referred to as a trocar with cleaning function) to clean the lens of a contaminated endoscope. However, this trocar with cleaning function has the following shortcomings.

[0024] On one hand, a trocar with a cleaning function mainly consists of a cleaning nozzle and a distal seal. The cleaning nozzle discharges fluid to clean the endoscope lens, and the distal seal isolates the cleaning working area within the cannula from the surgical area within the body cavity (the working area within the body cavity). When using a trocar with a cleaning function, to complete the cleaning operation, the physician needs to withdraw the contaminated endoscope lens from the working area within the body cavity back to the cleaning working area within the cannula. During this operation, contaminants on the endoscope may contaminate the distal seal of the trocar with a cleaning function. If the angle between the trocar with a cleaning function and the patient's abdominal wall is small, approaching parallel, the nozzle extending from the cannula's side wall can clean the endoscope lens but cannot clean the distal seal. When the endoscope lens is pushed out from the distal seal after cleaning, contaminants on the distal seal may contaminate the lens, resulting in ineffective cleaning.

[0025] On the other hand, when the angle between the trocar with cleaning function and the patient's abdominal wall is small and close to parallel, there is relatively little cleaning fluid between the cleaning nozzle and the distal seal, resulting in uneven formation of the anti-fogging water film and poor anti-fogging effect after cleaning.

[0026] On the other hand, trocars with cleaning functions have a lubricating medium, such as silicone oil, applied to the distal seal at the factory. The main purpose of applying the lubricating medium is to protect the lubrication of the trocar as it passes through the distal seal, thus preventing damage to the distal seal. Therefore, when cleaning the endoscope inside the cannula, the silicone oil on the distal seal must be thoroughly cleaned; otherwise, the silicone oil will contaminate the lens and cause blurred vision. However, the nozzle structure of current trocars with cleaning functions cannot directly and quickly clean the silicone oil off the distal seal.

[0027] To address at least one of the aforementioned problems, embodiments of this invention provide a trocar with a cleaning function and a fluid ejection structure with a bidirectional nozzle. This bidirectional ejection method ensures that the trocar, regardless of its position, can clean both the endoscope lens and the distal seal simultaneously, thereby guaranteeing cleaning effectiveness and avoiding repeated cleaning operations. The bidirectional nozzle fluid ejection structure ensures sufficient fluid when the endoscope lens is pushed out of the distal seal, guaranteeing the continued effectiveness of the endoscope lens's anti-fog water film function.

[0028] Figure 1 A cross-sectional side view of the access component of a puncture device provided for an embodiment of this utility model. Figure 2 for Figure 1 Enlarged view of point A in the middle. Figure 3 and Figure 4 A three-dimensional schematic diagram of the fluid ejection structure in the access component provided for an embodiment of this utility model. Figure 5 A three-dimensional schematic diagram of the fluid ejection structure and the distal seal in the access component provided for an embodiment of this utility model. Figure 6 A schematic diagram of fluid flow direction in the access component provided for an embodiment of this utility model. Figure 7 A schematic diagram of the path of fluid ejected from the bidirectional nozzle in the access component provided in an embodiment of this utility model.

[0029] This utility model relates to a fluid outlet structure for intraoperative cleaning of a laparoscopic lens within a trocar. This fluid outlet structure allows the endoscope to be retracted to any position within the trocar for cleaning, effectively cleaning both the endoscope lens and the distal seal.

[0030] An embodiment of this utility model provides a puncture device, including an access component. For example... Figure 1 and Figure 6As shown, the access assembly includes a cannula 100 and a distal seal 200. The distal seal 200 is configured to seal with the distal end of the cannula 100. For example, the distal seal 200 may consist of multiple sealing flaps. The distal seal 200 may be configured such that, when the endoscope is not passing through it, the multiple sealing flaps close by their inherent shape structure to form a seal, thereby preventing material from flowing out of the distal end of the access assembly from the cavity of the access assembly; when the endoscope passes through it, the multiple sealing flaps can elastically abut against the endoscope, gradually open, and remain against the sidewall of the endoscope to achieve a sealing performance.

[0031] like Figure 1 and Figure 6 As shown, the cannula 100 has an inner lumen 103 configured to receive surgical instruments. For example, surgical instruments include laparoscopic surgical instruments such as puncture cones and endoscopes 300.

[0032] The puncture cone can create an incision on the patient's body surface leading to the target location through the lumen 103 of the cannula 100, through which endoscopic surgery can be performed. After the puncture is created, the access component extends through the incision into the body cavity and remains there, while the puncture cone withdraws from the access component to provide an access point for endoscopic surgical instruments. An endoscope is inserted through the access component to allow visual examination and magnification of the body cavity. The surgeon can then perform diagnosis and / or treatment at the surgical site using surgical instruments (such as forceps, grippers, cutters, applicators, etc.) designed to engage with an additional cannula. The access component of the puncture device is the same as the access component for receiving the endoscope.

[0033] like Figure 6 As shown, the sleeve 100 includes an inner tube 101 and an outer tube 102. The inner cavity 103 is located inside the inner tube 101.

[0034] like Figure 1 , Figure 6 and Figure 7 As shown, the endoscope 300 can be accessed through the lumen 103 of the trocar with a cleaning function. During laparoscopic surgery, the endoscope lens may become contaminated with blood, grease, etc. Since the distal seal 200 provides a seal against the side wall of the endoscope 300, when the surgeon retracts the contaminated endoscope 300 into the cannula 100 for cleaning, the contaminants on the endoscope 300 will contaminate the distal seal 200. If the distal seal 200 cannot be cleaned, when the cleaned endoscope 300 extends from the distal seal 200, it will be contaminated by the contaminants on the distal seal 200, resulting in ineffective cleaning.

[0035] like Figure 1 and Figure 6As shown, the access component includes a fluid inflow channel 806. The fluid inflow channel 806 is configured to receive fluid from a fluid source. Fluid from the fluid source can enter the fluid inflow channel 806 through the inlet 801.

[0036] like Figures 1 to 7 As shown, the access component has a fluid ejection structure 600 connected to a fluid inflow channel 806. The fluid ejection structure 600 has a bidirectional nozzle 612, including a first nozzle 601 and a second nozzle 602, whose central axes coincide. The central axes of the bidirectional nozzle 612, the sleeve 100, and the distal seal 200 are substantially coincident, allowing for cleaning in two directions. In some other embodiments, the central axis of the bidirectional nozzle 612 is substantially coincident with the central axis of either the sleeve 100 or the distal seal 200; in still other embodiments, the central axis of the first nozzle 601 is substantially coincident with the central axis of the sleeve 100, and the central axis of the second nozzle 602 is substantially coincident with the central axis of the distal seal 200, thereby enabling precise cleaning of the endoscope 300 lens 301 and the distal seal 200 respectively. The central axis Z0 of sleeve 100 can be seen in Figure 2 As shown. Figure 7 The lens 301 of the endoscope 300 is shown. The lens 301 of the endoscope 300 is the distal end of the endoscope 300.

[0037] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the fluid ejection structure 600 is located in the inner cavity 103. The fluid ejection structure 600 is located at the distal end of the inner cavity 103.

[0038] like Figure 1 , Figure 2 , Figures 5 to 7 As shown, the second nozzle 602 faces the distal seal 200, and the first nozzle 601 faces away from the second nozzle 602. The bidirectional nozzle 612 is configured to jet fluid to clean the endoscope 300 and the distal seal 200. The first nozzle 601 faces the proximal end of the access assembly.

[0039] During the procedure, the endoscope lens becomes contaminated with blood, grease, and other pollutants. When the doctor retracts the endoscope into the cannula 100, the contaminants on the endoscope simultaneously contaminate the distal seal 200. When the endoscope is fully retracted into the cannula 100 and above the bidirectional nozzle 612, the cleaning process is triggered. Under negative pressure, fluid flows from the inlet 801 (e.g., Figure 1 and Figure 6As shown, the fluid flows in and downwards along the flow channel inside the side wall. Passing through the bidirectional nozzle 612 at the bottom of the cleaning channel, the fluid is simultaneously ejected in two axial directions. Figure 6 As shown. Because the bidirectional nozzle 612 is close to the distal seal 200, the fluid sprayed towards the distal seal 200 bounces back in the opposite direction after contacting the distal seal 200 (as indicated by the dotted line), as... Figure 7 As shown. Because the contact surface of the distal seal 200 forms a certain angle with the fluid, the rebounding fluid will scatter and further clean the endoscope 300. Therefore, the endoscope 300 is cleaned efficiently while the contaminated distal seal 200 is also cleaned. The bidirectional nozzle 612 is close to the distal seal 200, which can make full use of the rebounding and scattered fluid to further improve the cleaning efficiency.

[0040] At the same time, the distal seal 200 located at the lower end of the sleeve 100 is in a sealed state. Then, the gas-liquid mixture flows through the outlet 802 (e.g., under negative pressure) Figure 1 and Figure 6 (As shown) is suctioned out. After cleaning, the doctor pushes the endoscope 300 from inside the cannula 100 to the distal end through the distal seal 200. During the process of pushing the endoscope 300 out, the parts that come into contact with it, such as the distal seal 200, are in a clean state, which avoids secondary contamination of the endoscope 300 and avoids ineffective cleaning of the endoscope 300.

[0041] A bidirectional nozzle 612 is provided, and a second nozzle 602 is added inside the sleeve 100 to spray fluid toward the distal seal 200. This solves the problem that the distal seal 200 cannot be effectively cleaned after being contaminated, and avoids the problem of the endoscope 300 being contaminated when it is pushed out from inside the sleeve 100 toward the distal seal 200.

[0042] like Figure 1 , Figure 2 , Figures 5 to 7 As shown, the fluid ejection structure 600 is disposed near the distal seal 200. The fluid ejection structure 600 is disposed at the upper end of the distal seal 200.

[0043] like Figure 2 As shown, there is a gap G between the fluid ejection structure 600 (second nozzle 602) and the distal seal 200, meaning that the fluid ejection structure 600 and the distal seal 200 do not contact each other. Preferably, the size of the gap G is less than half the inner diameter of the sleeve 100. For example, the size of the gap G is less than half the inner diameter of the inner sleeve 101. Here, the gap refers to the distance between the second nozzle 602 and the distal seal 200. Because the distance between the second nozzle 602 and the distal seal 200 is relatively close, for example, the gap G, the fluid ejected toward the distal seal 200 bounces back in the opposite direction after contacting the distal seal 200 (e.g., ...). Figure 7 As shown by the dashed line, the cleaning efficiency can be further improved by utilizing the rebound and scattering of the fluid.

[0044] See Figures 2 to 7 The fluid ejection structure 600 also includes a fluid channel 613. For example... Figure 1 and Figure 6 As shown, the inlet end of the fluid channel 613 is connected to the fluid inflow channel 806, and the outlet end of the fluid channel 613 extends into the inner cavity 103 and is connected to the first nozzle 601 and the second nozzle 602 respectively. Figure 2 As shown, the position P1 of the first nozzle 601 is lower than the inlet end P2 of the fluid channel 613. Thus, in the axial direction of the access component, the first nozzle 601 is located at the far end of the inlet end of the fluid channel, and the bidirectional nozzle 612 is closer to the upper end of the far end seal 200.

[0045] See Figures 3 to 5 The fluid ejection structure 600 also includes a first sidewall 71 and a second sidewall 72. A bidirectional nozzle 612 is disposed at the intersection of the first sidewall 71 and the second sidewall 72. The first sidewall 71 and the second sidewall 72 are respectively disposed on both sides of the fluid channel 613. The first sidewall 71 and the second sidewall 72 extend from the inner wall of the sleeve 100 toward the central axis of the inner cavity 103, and extend from a position away from the distal seal 200 toward a position close to the distal seal 200.

[0046] For example, see Figures 3 to 5 The included angle formed by the first sidewall 71 and the second sidewall 72 ranges from 20° to 90° to facilitate maintaining the position of the bidirectional nozzle and ensuring that its extension direction does not change under fluid pressure. For example, the included angle formed by the first sidewall 71 and the second sidewall 72 ranges from 45° to 60°. In one embodiment, this included angle is approximately 54 degrees. Figure 2 and Figure 6 As shown, the bidirectional nozzle 612 is arranged along the extension direction of the central axis of the inner cavity 103.

[0047] See Figures 3 to 5A connecting component 73 is provided between the fluid channel 613 and the first sidewall 71, and between the fluid channel 613 and the second sidewall 72. The connecting component 73 is inclined relative to the radial plane of the sleeve 100. The length direction of the first sidewall 71 and the second sidewall 72 is inclined relative to the central axis of the sleeve 100, for example, consistent with the inclination direction and angle of the first inclined portion 6131. ​​The height direction of the first sidewall 71 and the second sidewall 72 is parallel to the central axis of the sleeve 100. The first sidewall 71, the second sidewall 72, and the connecting component 73 are made of soft materials. The thickness of the first sidewall 71 is greater than the thickness of the connecting component 73, and the thickness of the second sidewall 72 is greater than the thickness of the connecting component 73, so as to help maintain the position of the bidirectional nozzle and prevent it from tilting under fluid pressure. For example, at least one of the first sidewall 71, the second sidewall 72, and the intermediate connecting component 73 is made of silicone. For example, the hardness of the first sidewall 71 and the second sidewall 72 can be equal.

[0048] The first sidewall 71 and the second sidewall 72 can adopt the above-mentioned angle design and the above-mentioned design of a harder material, which is conducive to maintaining the bidirectional nozzle and preventing it from tilting under fluid pressure.

[0049] See Figure 2 , Figure 6 and Figure 7The fluid channel 613 is at least partially inclined. The fluid channel 613 includes a first inclined portion 6131, a second inclined portion 6132, and a connecting portion 6133 located between the first inclined portion 6131 and the second inclined portion 6132. The first inclined portion 6131 is the main body portion of the fluid channel 613. For example, the first inclined portion 6131 is the portion of the fluid channel 613 near the inlet end of the fluid channel 613; the first inclined portion 6131 can also be considered as the portion of the fluid channel 613 near the fluid inflow channel 806. The first inclined portion 6131 of the fluid channel 613 is inclined relative to the central axis of the sleeve 100, that is, the extending direction of the first inclined portion 6131 of the fluid channel 613 has an angle between it and the central axis of the sleeve 100 that is neither zero nor 90 degrees. This design helps to reduce flow resistance and improve flushing efficiency. For example, the angle A0 between the first inclined portion 6131 of the fluid channel 613 and the cross section P0 perpendicular to the central axis Z0 of the sleeve 100 is greater than 30° and less than or equal to 60°. Further, for example, the angle A0 between the fluid channel 613 and the cross section P0 of the sleeve 100 is greater than or equal to 45° and less than or equal to 60°. The extending direction of the connecting portion 6133 may be perpendicular to the central axis of the sleeve 100. For example, the second inclined portion 6132 is inclined relative to the central axis of the sleeve 100. For example, the angle between the extending direction of the second inclined portion 6132 and the cross section P0 perpendicular to the central axis Z0 of the sleeve 100 is greater than 30° and less than or equal to 60°, further, for example, the angle is greater than or equal to 45° and less than or equal to 60°.

[0050] The central axis of the first nozzle 601 and the second nozzle 602 of the bidirectional nozzle 612 is basically coincident with the central axis of the sleeve 100 and the central axis of the distal seal 200, so as to be in a better cleaning position and improve cleaning efficiency.

[0051] The inlet 801 and the bidirectional nozzle 612 are respectively located in the fluid inflow channel 806 (e.g., Figure 1 and Figure 6 The outlet 802 is located at both ends of the fluid outflow channel 808 (as shown in the figure). Figure 1 and Figure 6 (As shown) at one end. A fluid inflow channel 806 and a fluid outflow channel 808 are disposed within the sleeve 100. Specifically, the fluid inflow channel 806 and the fluid outflow channel 808 are disposed within the space between the inner tube 101 and the outer tube 102 of the sleeve 100. For example... Figure 6 As shown, arrows schematically indicate the directions of fluid inflow and outflow.

[0052] For example, when the distal end of the endoscope 300 extends distally from the lumen through the distal seal 200, the fluid ejection structure 600 is pushed against the inner wall of the cannula 100 by the sidewall of the endoscope 300. At this time, the fluid ejection structure 600 is clamped between the inner wall of the cannula 100 and the sidewall of the endoscope 300, thereby blocking the fluid ejection structure 600 and automatically stopping the ejection of fluid.

[0053] The term "fluid" refers to substances that are fluid, including but not limited to liquids (such as pure liquids, solutions, colloids, suspensions, and turbid liquids), gases, gas-liquid two-phase mixtures, plasmas, fluidized solid particles, etc.

[0054] The following points need to be explained:

[0055] (1) The accompanying drawings of the embodiments of this utility model only involve the structures involved in the embodiments of this utility model. Other structures can be referred to the general design.

[0056] (2) Where there is no conflict, features of the same embodiment and different embodiments of the present invention can be combined with each other.

[0057] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. An access component for receiving an endoscope, characterized in that, include: A cannula having an inner lumen configured to receive the endoscope; A distal seal is configured to provide a sealing connection to the distal end of the sleeve; A fluid inflow channel is configured to receive fluid from a fluid source; as well as A fluid ejection structure, located in the inner cavity and connected to the fluid inflow channel, has a bidirectional nozzle, which includes a first nozzle and a second nozzle. The second nozzle faces the distal seal, and the first nozzle faces away from the second nozzle. The bidirectional nozzle is configured to eject fluid to clean the endoscope and the distal seal.

2. The access component according to claim 1, characterized in that, The fluid ejection structure further includes a fluid channel, the inlet end of which is connected to the fluid inflow channel, and the outlet end of which extends into the inner cavity and is connected to the first nozzle and the second nozzle respectively. In the axial direction of the access component, the first nozzle is located at the distal end of the inlet end of the fluid channel.

3. The access component according to claim 2, characterized in that, The fluid channel includes a main body portion, which is inclined relative to the central axis of the sleeve.

4. The access component according to claim 3, characterized in that, The angle between the main body portion and the cross section perpendicular to the central axis of the sleeve is greater than 30° and less than or equal to 60°.

5. The access component according to claim 1, characterized in that, The fluid ejection structure is located close to the distal seal, and there is a gap between the second nozzle and the distal seal.

6. The access component according to claim 5, characterized in that, The size of the gap is less than half the inner diameter of the sleeve.

7. The access component according to any one of claims 1-6, characterized in that, The central axes of the first nozzle and the second nozzle coincide, and the central axes of the first nozzle and the second nozzle coincide with the central axis of either the sleeve or the distal seal; or, the central axis of the first nozzle coincides with the central axis of the sleeve and the central axis of the second nozzle coincides with the central axis of the distal seal.

8. The access component according to any one of claims 2-4, characterized in that, The fluid ejection structure further includes a first sidewall and a second sidewall, which are respectively disposed on both sides of the fluid channel. The first sidewall and the second sidewall extend from the inner wall of the sleeve to the central axis of the inner cavity, and the bidirectional nozzle is disposed at the intersection of the first sidewall and the second sidewall.

9. The access component according to claim 8, characterized in that, The angle formed by the first sidewall and the second sidewall ranges from 20° to 90°.

10. The access component according to claim 8, characterized in that, A connecting component is provided between the fluid channel and the first sidewall and between the fluid channel and the second sidewall. The thickness of the first sidewall is greater than the thickness of the connecting component, and the thickness of the second sidewall is greater than the thickness of the connecting component. The first sidewall, the second sidewall, and / or the connecting component are made of a soft material.

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