Cavity opening device

Abstract

The cavity opening device of this invention includes a cavity opening mechanism, an outer sheath, a handle grip, and a control mechanism. The cavity opening mechanism includes an opening end and a connecting part; the opening end is located at the distal end of the connecting part, and the proximal end of the connecting part is connected to the control mechanism; the cavity opening mechanism is built into the outer sheath; the handle grip is located at the proximal end of the outer sheath. Before entering the cavity, the opening end is built into the outer sheath; after entering the cavity, the control mechanism controls the opening end to enter and unfold within the cavity through the connecting part, opening the cavity and expanding the field of view during surgery. The opening end is made of medical-grade elastic material, which not only has good strength to ensure the opening effect, but also has deformation capacity. When the force is too great, it can undergo moderate elastic deformation, preventing accidental damage to surrounding tissues due to excessive force or sharp edges, making clinical use safer.

Description

Technical Field

[0001] This invention relates to a surgical instrument, and more particularly to a cavity opening device for use in minimally invasive surgery. Background Technology

[0002] With the increasing development of medical endoscopes and minimally invasive surgery, more and more surgeries can be performed minimally invasively with the help of endoscopes. A prerequisite for minimally invasive endoscopic surgery is sufficient operating space. Therefore, in the body, the operating space can be created by establishing pneumoperitoneum.

[0003] However, for areas like the joint cavity, due to their complex structure and small joint spaces, the surgical field is inherently limited. This is especially true when inflammation leads to fibrosis and sclerosis, causing significant joint space contracture and weakened, less elastic tissue. Since methods like pneumoperitoneum cannot expand the operating space, the common approach is to use joint traction to maintain the surgical field as much as possible. To prevent visual impairment due to local bleeding, saline solution is often injected simultaneously to increase local pressure. However, prolonged high pressure from saline solution can compress nerves, blood vessels, and soft tissues, causing secondary damage. Furthermore, when the injected saline solution contains tranexamic acid or adrenaline, it can lead to changes in heart rate, increased blood pressure, or even thrombosis.

[0004] Therefore, there is a need to design a new type of surgical access device, especially suitable for arthroscopic and other joint surgeries, which can expand the surgical field of view and avoid secondary damage during long surgical procedures. Summary of the Invention

[0005] The cavity expansion device of the present invention can expand the soft tissue around the surgical field of view through the expansion end. The expansion end, made of elastic material, ensures the support effect while avoiding secondary damage to the tissue during long-term surgery, thereby achieving the purpose of safely and effectively expanding the intraoperative observation field of view for a long time.

[0006] The cavity opening device of the present invention is characterized in that: the cavity opening device 100 includes a cavity opening mechanism 1, an outer sheath tube 2, a handle gripping part 3, and a control mechanism 4;

[0007] A. The cavity opening mechanism 1 includes an opening end 11 and a connecting part 12; the opening end 11 is located at the distal end of the connecting part 12, and the proximal end of the connecting part 12 is connected to the control mechanism 4; the opening end 11 can open the cavity and expand the field of view during surgery.

[0008] B. The cavity opening mechanism 1 is built into the outer sheath tube 2; the handle grip part 3 is located at the proximal end of the outer sheath tube 2;

[0009] C. Before entering the cavity, the spreading end 11 is built into the outer sheath tube 2; after entering the cavity, the control mechanism 4 controls the spreading end 11 to enter the cavity and unfold through the connecting part 12, thereby expanding the observation field during surgery.

[0010] The unfolded opening end 11 typically has a smooth, rounded shape, such as an ellipse, without sharp edges or corners, thus avoiding any impact on surrounding tissues during the unfolding process. The connecting part 12 is usually made of a rigid material, and it does not deform during the process of the control mechanism 4 pushing the opening end 11 out of the outer sheath 2, providing good delivery force. The unfolded opening end 11 has sufficient support to expand the cavity, significantly increasing the field of vision during surgery.

[0011] The expansion end 11 is made of medical elastic material. Medical elastic material not only has good support force, but also has deformation ability. It can not only compress the expansion end 11 into the outer sheath tube 2, but also expand it well after being pushed out to expand the tissue. Moreover, it can form elastic support with the tissue. When the tissue is subjected to large external force, it can deform and is not easy to cause secondary damage caused by continuous external force.

[0012] The medical elastic material is medical-grade stainless steel, medical-grade shape memory alloy, medical-grade polymer material, or medical-grade composite material. Medical-grade composite materials are typically made by coating stainless steel or medical-grade shape memory alloy with medical-grade polymer materials such as silicone or TPU. This ensures the supporting force of the extended end 11 while providing a soft surface, making it more flexible in contact with tissue and less likely to cause accidental tissue damage. The applicant has only specifically described the above-mentioned medical elastic materials. In practical applications, those skilled in the art can select other medical elastic materials as needed for manufacturing. The applicant will not provide specific examples here, but all will fall within the scope of protection of this application.

[0013] The expansion end 11 is a component that can be preset into different shapes to adapt to different cavity shapes. The expansion end 11 can be preset into various shapes such as circular, elliptical, petal-shaped, and polygonal to adapt to different cavity shape requirements.

[0014] Preferably, the expansion end 11 is made of medical shape memory alloy. When outside the body, the expansion end 11 is compressed and built into the channel of the outer sheath 2. After entering the cavity, under the action of body temperature, the expansion end 11 automatically unfolds and returns to the preset shape, thus expanding the cavity. When the expansion end 11 is made of shape memory alloy, it can be preset to the required shape through shape memory alloy training. Then, the expansion end 11 is compressed into the channel of the outer sheath 2. After entering the cavity, the expansion end 11 is pushed out by the control mechanism 4 through the connecting part 12. Under the action of body temperature, the expansion end 11 automatically unfolds and returns to the preset shape. It is very convenient to use, and the shape memory alloy has good support and elasticity, with good expansion effect, while not easily causing accidental damage to tissues.

[0015] The shape and size of the opening end 11 can be adjusted in real time by the control mechanism 4. The control mechanism 4 allows for real-time adjustment of the shape and size of the opening end 11 as needed during the surgical procedure.

[0016] The cavity opening mechanism 1 includes at least one opening end 11.

[0017] The support end 11 includes two or more support ends 11.

[0018] The cavity opening mechanism 1 may include multiple opening ends 11, and the opening ends 11 may be designed with different shapes and sizes to adapt to the shape and size requirements of different directions within the cavity.

[0019] The control mechanism 4 can adjust the different opening ends 11 individually. Since the control mechanism 4 can adjust each opening end 11 independently, during surgery, medical personnel can individually control the shape and size of the opening end 11 in each direction according to the actual needs of the surgery, thereby meeting the angular requirements of different cavities in different directions.

[0020] The control mechanism 4 adjusts the space of the cavity by adjusting the extension length of the opening end 11. When the extension length of the opening end 11 is small, the shape of the support end 11 entering the body is smaller, and the support area of ​​the opening end 11 is correspondingly smaller. When the extension length of the opening end 11 is large, the shape of the support end 11 entering the body is correspondingly larger, and the support area of ​​the opening end 11 is correspondingly larger. This control method can be achieved with only very simple pushing and pulling actions, making it very convenient to use during surgery.

[0021] The spreading end 11 has a smooth edge. The smooth edge will not cause damage to the tissue during the unfolding process of the spreading end 11, and during the continuous unfolding process, since there is no sharp edge, there will be no stress concentration, which will not easily lead to long-term compression and ischemia of the tissue or even tissue necrosis.

[0022] The cross-section of the opening end 11 is flat. The flat design can provide better vertical support while reducing the space occupied in the cavity and maximizing the surgical space.

[0023] The cavity opening device 100 also includes a constraint / locking device 5. The constraint / locking device 5 can ensure that the cavity opening mechanism 1 will not be accidentally pushed out when it is compressed and built into the outer sheath tube 2, and can also lock the cavity opening mechanism 1 in the working state to more stably ensure the opening effect of the cavity.

[0024] The cavity opening device 100 also includes a lighting device 6. The lighting device 6 can provide illumination for the surgical space within the cavity.

[0025] The lighting device 6 includes a light source 61, a control system 62, and a power supply / circuit system 63. The light source 61 is connected to and disconnected from the power supply / circuit system 63 via the control system 62. The control system 62 is equipped with a switch 62-1, which controls the connection and disconnection of the power supply / circuit system 63, thereby turning off the operation of the light source 61.

[0026] The color of the light source 61 can be set to different colors as needed, and the control system 62 enables switching between different colors. The control system 62 is equipped with a color mode control button 62-2, which can be set to different colors as needed, such as green fluorescence, eye-protecting blue light, white, etc., to adapt to different surgical environments.

[0027] The light source 61 is an LED light source and is located at the distal end of the outer sheath 2. When the light source 61 is designed as an LED light source, since LED light sources have the advantage of low heat generation, the LED light source can be directly placed at the distal end of the outer sheath 2 near the cavity of the surgical site to directly illuminate the surgical site.

[0028] In clinical use, the handle grip 3 is held, the outer sheath 2 is inserted into the body, and the control mechanism 4 is pushed forward, causing the connecting part 12 to extend the opening end 11. Under the action of elastic recovery force or the shape memory function of shape memory alloy, the opening end 11 unfolds, opening the cavity. During the operation, the degree of unfolding of the opening end 11 is adjusted in real time according to the progress of the operation to ensure the surgical field of vision. After the operation, the control mechanism 4 is pulled back to retract the opening end 11 into the outer sheath 2, and the cavity opening device of the present invention can be removed from the body.

[0029] The cavity opening device of the present invention includes a cavity opening mechanism 1, an outer sheath 2, a handle gripping part 3, and a control mechanism 4. The cavity opening mechanism 1 includes an opening end 11 and a connecting part 12; the opening end 11 is located at the distal end of the connecting part 12, and the proximal end of the connecting part 12 is connected to the control mechanism 4; the cavity opening mechanism 1 is built into the outer sheath 2; the handle gripping part 3 is located at the proximal end of the outer sheath 2. Before entering the cavity, the opening end 11 is built into the outer sheath 2; after entering the cavity, the control mechanism 4 controls the opening end 11 to enter and unfold within the cavity through the connecting part 12, thus opening the cavity and expanding the field of view during surgery. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the cavity expansion device of the present invention in its retracted state.

[0031] Figure 1-1 yes Figure 1 The main view.

[0032] Figure 1-2 yes Figure 1-1 AA sectional view.

[0033] Figure 1-3 yes Figure 1 Exploded view.

[0034] Figure 1-4 yes Figure 1 A schematic diagram of the three-dimensional structure in its fully extended state.

[0035] Figure 1-5 yes Figure 1-4 BB cross-sectional view.

[0036] Figure 1-6 yes Figure 1-4 The main view.

[0037] Figure 1-7 yes Figure 1-6 CC section view.

[0038] Figure 1-8 yes Figure 1A schematic diagram of a three-dimensional structure in a state where the open end is not fully unfolded.

[0039] Figure 1-9 yes Figure 1-8 The main view.

[0040] Figure 1-1 0 is Figure 1-9 DD sectional view.

[0041] Figure 1-1 1 is a schematic diagram of a three-dimensional structure with an open end pre-designed into an irregular shape.

[0042] Figure 1-1 2 is a schematic diagram of the cavity opening device of the present invention with the locking knob in the locked state.

[0043] Figure 1-1 3 is Figure 1-1 EE section view of 2.

[0044] Figure 1-1 4 is Figure 1-1 A schematic diagram of the structure in the loosened state of 2.

[0045] Figure 1-1 5 is Figure 1-1 FF section view of 4.

[0046] Figure 2 This is a three-dimensional structural diagram of the cavity expansion device of the present invention with two expansion ends in the retracted state.

[0047] Figure 2-1 yes Figure 2 The main view.

[0048] Figure 2-2 yes Figure 2-1 GG cross-sectional view.

[0049] Figure 2-3 yes Figure 2 A three-dimensional structural diagram of the unfolded state of the structure.

[0050] Figure 2-4 yes Figure 2-3 The main view.

[0051] Figure 2-5 yes Figure 2-4 HH sectional view.

[0052] Figure 3 This is a three-dimensional structural diagram of the cavity expansion device of the present invention with three expansion ends in the retracted state.

[0053] Figure 3-1 yes Figure 3 The main view.

[0054] Figure 3-2 yes Figure 3-1 Section II.

[0055] Figure 3-3 yes Figure 3 Exploded view.

[0056] Figure 3-4 yes Figure 2 A three-dimensional structural diagram of the unfolded state of the structure.

[0057] Figure 3-5 yes Figure 3-4 The main view.

[0058] Figure 4 This is a schematic diagram of the cavity opening device of the present invention, which includes a lighting device.

[0059] Figure 4-1 yes Figure 4 Enlarged view of point J.

[0060] In the above figure:

[0061] 100 is the cavity opening device of the present invention.

[0062] 1 is the cavity opening mechanism, 2 is the outer sheath tube, 3 is the handle grip, 4 is the control mechanism, 5 is the restraint / locking device, and 6 is the lighting device.

[0063] 11 is the opening end, 12 is the connecting part, 21 is the positioning protrusion, 41 is the limiting point, 51 is the positioning groove, 52 is the locking knob, 61 is the light source, 62 is the control system, and 63 is the power supply / circuit system.

[0064] 52-1 is the locking surface, 62-1 is the switch, and 62-2 is the color mode control button. Detailed Implementation

[0065] Example 1: Cavity opening device of the present invention

[0066] refer to Figures 1 to 1-11 The cavity opening device in this embodiment includes a cavity opening mechanism 1, an outer sheath tube 2, a handle gripping part 3, and a control mechanism 4.

[0067] The cavity opening mechanism 1 includes an opening end 11 and a connecting part 12; the opening end 11 is fixedly disposed at the distal end of the connecting part 12 by injection molding, and the proximal end of the connecting part 12 is integrally injection molded to the control mechanism 4. In practical applications, those skilled in the art can also use various methods such as riveting, bonding, and interference fit to achieve the connection between the opening end 11, the connecting part 12, and the control mechanism 4. The applicant will not give examples here, but none of them depart from the protection scope of this application.

[0068] refer to Figures 1 to 1-2 The cavity opening mechanism 1 is built into the outer sheath tube 2, and the handle grip part 3 is located at the proximal end of the outer sheath tube 2.

[0069] refer to Figures 1-2 to 1-4 In this embodiment, the cavity opening mechanism 1 includes one opening end 11.

[0070] The expansion end 11 is made of medical elastic material. Medical elastic material not only has good support force, but also has deformation ability. It can not only compress the expansion end 11 into the outer sheath tube 2, but also expand it well after being pushed out to expand the tissue. Moreover, it can form elastic support with the tissue. When the tissue is subjected to large external force, it can deform and is not easy to cause secondary damage caused by continuous external force.

[0071] The medical elastic material can be medical stainless steel, medical shape memory alloy, medical polymer material, or medical composite material. Medical composite materials are typically made by coating stainless steel or medical shape memory alloy with medical polymer materials such as silicone or TPU. This ensures the supporting force of the expanded end 11 while providing a soft surface, making it more flexible in contact with tissue and less likely to cause accidental tissue damage. The applicant has only specifically described the above-mentioned medical elastic materials. In practical applications, those skilled in the art can select other medical elastic materials as needed for manufacturing. The applicant will not provide specific examples here, but all will fall within the scope of protection of this application.

[0072] In this embodiment, the expansion end 11 is made of medical shape memory alloy. When outside the body, the expansion end 11 is compressed and built into the channel of the outer sheath 2. After entering the cavity, under the action of body temperature, the expansion end 11 automatically unfolds and returns to the preset shape, thus expanding the cavity. When the expansion end 11 is made of shape memory alloy, it can be preset to the required shape through shape memory alloy training. Then, the expansion end 11 is compressed into the channel of the outer sheath 2 and enters the cavity. The control mechanism 4 pushes the expansion end 11 out through the connecting part 12. Under the action of body temperature, the expansion end 11 automatically unfolds and returns to the preset shape. It is very convenient to use, and the shape memory alloy has good support and elasticity, with good expansion effect, while not easily causing accidental damage to tissues.

[0073] refer to Figure 1-1 1. The expansion end 11 is a component that can be preset into different shapes to adapt to different cavity shapes. The expansion end 11 can be preset into various shapes such as circular, elliptical, petal-shaped, and polygonal to adapt to different cavity shape requirements.

[0074] The shape and size of the opening end 11 can be adjusted in real time by the control mechanism 4. The control mechanism 4 allows for real-time adjustment of the shape and size of the opening end 11 as needed during the surgical procedure.

[0075] refer to Figures 1-4 to 1-10 In this embodiment, the control mechanism 4 adjusts the space of the cavity by adjusting the extension length of the opening end 11. When the extension length of the opening end 11 is small, the shape of the support end 11 entering the body is smaller, and the support area of ​​the opening end 11 is correspondingly smaller. When the extension length of the opening end 11 is large, the shape of the support end 11 entering the body is correspondingly larger, and the support area of ​​the opening end 11 is correspondingly larger. This control method can be achieved with only very simple pushing and pulling actions, making it very convenient to use during surgery.

[0076] refer to Figure 1-5 The spreading end 11 has a smooth edge. The smooth edge will not cause damage to the tissue during the unfolding process of the spreading end 11, and during the continuous unfolding process, since there is no sharp edge, there will be no stress concentration, which will not easily lead to long-term compression and ischemia of the tissue or even tissue necrosis.

[0077] In this embodiment, the cross-section of the expanded end 11 is flat, as shown in the reference. Figure 1-5 The flat design provides better vertical support while reducing the space occupied within the cavity, thus maximizing the surgical space.

[0078] The connecting part 12 is typically made of a rigid material, and it does not deform during the process of the operating mechanism 4 pushing the spreading end 11 out of the outer sheath tube 2, thus having good delivery force.

[0079] In practical applications, the expansion end 11 may include multiple expansion ends 11. Moreover, each expansion end 11 can be designed with different shapes and sizes to adapt to the shape and size requirements of different directions within the cavity.

[0080] refer to Figures 2 to 2-5 The supporting end 11 includes two supporting ends 11.

[0081] refer to Figures 3 to 3-4 The supporting end 11 includes 3 supporting ends 11.

[0082] refer to Figure 2-3 and Figure 3-4The control mechanism 4 can adjust each of the expansion ends 11 individually. Therefore, during the operation, medical staff can control the shape and size of the expansion ends 11 in each direction according to the actual needs of the operation, so as to meet the angle requirements of different cavities in different directions.

[0083] refer to Figure 3 The cavity opening device 100 further includes a restraint / locking device 5. One end of the restraint / locking device 5 is connected to the proximal end of the outer sheath 2, and the other end is connected to the distal end of the control mechanism 4. (Reference) Figure 3-3 The outer sheath 2 has a positioning protrusion 21 at its proximal end, and the control mechanism 4 has a limiting point 41 at its distal end. The constraint / locking device 5 has positioning grooves 51 at both ends. During installation, the positioning groove 51 at the distal end of the constraint / locking device 5 is embedded in the positioning protrusion 21, forming a concave-convex locking connection with the outer sheath 2. The positioning groove 51 at the proximal end of the constraint / locking device 5 covers the outside of the limiting point 41 at the distal end of the control mechanism 4, forming an interference fit connection with the limiting point 41, thereby ensuring that the cavity opening mechanism 1 will not be accidentally pushed out when it is compressed and built into the outer sheath 2.

[0084] refer to Figures 1-12 to 1-15 The constraint / locking device 5 can also be a locking knob 52. The locking knob 52 has a shape that matches the driving connecting part 12. When it is in the locked state, the locking surface 52-1 of the locking knob 52 presses against the outer surface of the connecting part 12, preventing the connecting part 12 from moving. The opening end 11 is locked, stably ensuring the opening effect on the cavity. When the locking knob 52 is in the released state, the locking surface 52-1 separates from the outer surface of the connecting part 12, allowing the connecting part 12 to move, and the opening end 11 can be adjusted or retracted.

[0085] In clinical use, hold the handle grip 3, insert the outer sheath 2 into the body, remove the restraint / locking device 5, and then push the control mechanism 4 forward. This will cause the connecting part 12 to extend the opening end 11. Under the action of elastic recovery force or the shape memory function of the shape memory alloy, the opening end 11 unfolds, opening the cavity. Simultaneously, the unfolded shape of the opening end 11 is adjusted according to the cavity's condition. During the surgery, the degree of unfolding of the opening end 11 is also adjusted in real time according to the surgical progress to ensure a clear surgical field of vision. After the surgery, pull the control mechanism 4 backward to retract the opening end 11 back into the outer sheath 2, thus removing the cavity opening device of this invention from the body.

[0086] In this embodiment, the unfolded opening end 11 typically has a smooth, rounded shape, such as an ellipse, without sharp edges or corners, thus avoiding any impact on surrounding tissues during the unfolding process. The connecting portion 12 is typically made of a rigid material, and during the process of the control mechanism 4 pushing the opening end 11 out of the outer sheath 2, the connecting portion 12 does not deform, providing good delivery force. The unfolded opening end 11 has sufficient support force to expand the cavity, significantly increasing the field of view during surgery. Made of medical elastic material, the opening end 11 not only has good support force but also deformation capability. It can be compressed within the outer sheath 2 and unfolded well after being pushed out, effectively expanding the tissue. Furthermore, it can form elastic support with the tissue, deforming under large external forces, thus reducing the risk of secondary damage caused by sustained external forces.

[0087] Example 2: Cavity opening device of the present invention with lighting device

[0088] refer to Figure 4 and Figure 4-1 The difference between this embodiment and embodiment 1 is that in this embodiment, the cavity opening device 100 also includes a lighting device 6.

[0089] refer to Figure 4 and Figure 4-1 The lighting device 6 includes a light source 61, a control system 62, and a power supply / circuit system 63. The light source 61 is connected to and disconnected from the power supply / circuit system 63 via the control system 62. The control system 62 is equipped with a switch 62-1, which controls the connection and disconnection of the power supply / circuit system 63, thereby turning off the operation of the light source 61.

[0090] The color of the light source 61 can be set to different colors as needed, and the control system 62 enables switching between different colors. The control system 62 is equipped with a color mode control button 62-2, which can be set to different colors as needed, such as green fluorescence, eye-protecting blue light, white, etc., to adapt to different surgical environments.

[0091] The light source 61 is an LED light source and is located at the distal end of the outer sheath 2. When the light source 61 is designed as an LED light source, since LED light sources have the advantage of low heat generation, the LED light source can be directly placed at the distal end of the outer sheath 2 near the cavity of the surgical site to directly illuminate the surgical site.

[0092] In this embodiment, the lighting device 6 can provide illumination in clinical applications, and different light sources can be selected as needed, making clinical use more convenient.

[0093] It should be noted that the structures disclosed and described herein can be replaced by other structures with the same effect, and the embodiments described herein are not the only structures for implementing the present invention. Although preferred embodiments of the present invention have been described and illustrated herein, those skilled in the art will understand that these embodiments are merely illustrative, and those skilled in the art can make numerous variations, modifications, and substitutions without departing from the present invention. Therefore, the scope of protection of the present invention should be defined in accordance with the spirit and scope of the appended claims.

Claims

1. A cavity opening device, characterized in that: The cavity opening device (100) includes a cavity opening mechanism (1), an outer sheath (2), a handle grip (3), and a control mechanism (4). A. The cavity opening mechanism (1) includes an opening end (11) and a connecting part (12); the opening end (11) has a smooth edge, the opening end (11) includes two or more opening ends (11), the opening end (11) is located at the distal end of the connecting part (12), the proximal end of the connecting part (12) is connected to the control mechanism (4), the control mechanism (4) can adjust different opening ends (11) respectively; the opening end (11) can open the cavity and expand the field of view during surgery; B. The cavity opening mechanism (1) is built into the outer sheath (2); the handle grip (3) is located at the proximal end of the outer sheath (2); C. Before entering the cavity, the opening end (11) is built into the outer sheath (2); after entering the cavity, the control mechanism (4) controls the opening end (11) to enter the cavity and unfold through the connecting part (12), opening the cavity and expanding the field of view during surgery.

2. The cavity opening device according to claim 1, characterized in that: The expansion end (11) is made of medical elastic material.

3. The cavity opening device according to claim 2, characterized in that: The medical elastic material is medical stainless steel, medical shape memory alloy, medical polymer material, or medical composite material.

4. The cavity opening device according to claim 3, characterized in that: The expansion end (11) is a component that can be pre-set into different shapes to adapt to different cavity shapes.

5. The cavity opening device according to claim 4, characterized in that: The expansion end (11) is made of medical shape memory alloy. When outside the body, the expansion end (11) is compressed and built into the channel of the outer sheath (2). After entering the cavity, under the action of body temperature, the expansion end (11) automatically unfolds and restores to the preset shape, thus expanding the cavity.

6. The cavity opening device according to claim 1, characterized in that: The shape and size of the extended end (11) can be adjusted in real time by the control mechanism (4).

7. The cavity opening device according to claim 6, characterized in that: The control mechanism (4) adjusts the space of the cavity by adjusting the extension length of the opening end (11).

8. The cavity opening device according to claim 1, characterized in that: The cross-section of the extended end (11) is flat.

9. The cavity opening device according to claim 1, characterized in that: The cavity opening device (100) also includes a constraint / locking device (5).

10. The cavity opening device according to claim 1, characterized in that: The cavity opening device (100) also includes a lighting device (6).

11. The cavity opening device according to claim 10, characterized in that: The lighting device (6) includes a light source (61), a control system (62), and a power supply / circuit system (63); the light source (61) is connected to and disconnected from the power supply / circuit system (63) via the control system (62).

12. The cavity opening device according to claim 11, characterized in that: The color of the light source (61) can be set to different colors as needed, and the switching between different colors can be achieved through the control system (62).

13. The cavity opening device according to claim 11, characterized in that: The light source (61) is an LED light source, which is located at the far end of the outer sheath (2).

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