Object taking bag capable of being opened and closed repeatedly

Abstract

The utility model provides a fetching bag capable of being opened and closed repeatedly, and relates to the technical field of surgical instruments. The object taking bag capable of being opened and closed repeatedly comprises an outer pipe, an inner rod, an opening device and a bag body, the inner rod is arranged in the outer pipe and is in sliding fit with the outer pipe, the opening device is sleeved with a bag opening of the bag body, an extending part is arranged at the position, close to the bag opening, of the bag body, the opening device is provided with a fixing part, and the fixing part and the extending part of the opening device are both connected with the inner rod. The requirement that cut tissue needs to be taken out for multiple times in an operation can be met.

Description

Technical Field

[0001] The present application relates to the technical field of surgical instruments, and in particular to a removable bag that can be opened and closed repeatedly. Background Art

[0002] The retrieval bag is a commonly used medical device, mainly used to remove tissue from the body during laparoscopic surgery. The conventional components of the retrieval bag include an outer tube, an inner rod, an opening device and a bag body. The bag body is installed on the opening device, and the opening device is connected to the inner rod. During laparoscopic surgery, the retrieval bag enters the human body through the puncture device. The doctor pushes the inner rod to push the opening device and the bag body out of the outer tube. The opening device is reset to open the bag mouth, and then the removed tissue is placed into the bag body through other surgical instruments. Then the doctor will pull back the inner rod to close the bag mouth at the outer tube, and finally remove the retrieval bag from the puncture channel to complete the removal of the removed tissue.

[0003] When the inner rod is pulled back, the bag body will be blocked by the outer tube and will not return to the inner tube with the inner rod and the opening device. The bag opening of the bag body is no longer mounted on the opening device, but is gathered at the front end of the opening device to form a closure. If the action of opening the retrieval bag is repeated at this time, the bag opening of the bag body will still gather at the front end of the opening device and cannot be opened autonomously. Therefore, conventional retrieval bags can only be opened and closed once, which cannot meet the need for multiple retrieval of excised tissues during surgery. Utility Model Content

[0004] The purpose of the present application includes, for example, providing a retrieval bag that can be opened and closed repeatedly, which can meet the need of removing excised tissue multiple times during surgery.

[0005] The embodiments of the present application can be implemented as follows:

[0006] An embodiment of the present application provides a removable bag that can be opened and closed repeatedly, comprising an outer tube, an inner rod, an opening device and a bag body, wherein the inner rod is arranged inside the outer tube, and the inner rod and the outer tube are slidably matched, the bag opening of the bag body is sleeved on the opening device, the bag body is provided with an extension portion near the bag opening, the opening device is provided with a fixing portion, and the fixing portion and the extension portion of the opening device are both connected to the inner rod.

[0007] Optionally, a first fixing piece is provided on the inner rod, the fixing portion of the opening device and the extending portion are clamped between the first fixing piece and the inner rod, a pin is provided on the inner rod, a first positioning hole is provided on the extending portion, and the pin passes through the inner rod, the fixing portion of the opening device, the first fixing piece and the first positioning hole at the same time.

[0008] Optionally, a protrusion is provided on the inner rod, and a recess is provided on the first fixing member, and the protrusion cooperates with the recess.

[0009] Optionally, a second positioning hole is formed in the extension portion, a positioning post is arranged on the inner rod, the positioning post is matched with the second positioning hole, and the positioning post penetrates through the first fixing member.

[0010] Optionally, two indicating portions are spaced apart on the inner rod. When the two indicating portions are respectively exposed from the outer tube, the two indicating portions are respectively used to indicate that the bag mouth of the bag body is received into the outer tube and the bag body is received into the outer tube.

[0011] Optionally, the bag body is made of TPU material. When the bag body is located outside the outer tube, the bag body inclines toward the side away from the outer tube.

[0012] Optionally, an outer tube handle is sleeved on the outer tube. A through hole is arranged in the outer tube handle, a sealing member is arranged in the through hole, and the inner rod passes through the sealing member.

[0013] Optionally, a sealing protrusion is arranged inside the sealing member, and the sealing protrusion abuts against the inner rod.

[0014] Optionally, an annular protrusion is arranged in the through hole. A clamping groove is formed between the annular protrusion and the inner wall of the through hole. A clamping portion is arranged on the sealing member, and the clamping groove is clamped with the clamping portion;

[0015] A second fixing member is further arranged in the through hole, and the second fixing member is used to press the sealing member toward the annular protrusion.

[0016] Optionally, a buckle is arranged on the second fixing member, a clamping groove is formed in the inner wall of the through hole, and the buckle is clamped with the clamping groove.

[0017] The beneficial effects of the reusable retrieval bag provided by the embodiments of the present application include, for example: In order to meet the need for multiple removals of excised tissues during surgery, a reusable retrieval bag is designed. The retrieval bag includes an outer tube, an inner rod, an opening device, and a bag body. The inner rod is disposed inside the outer tube and is slidably engaged with the outer tube. The bag mouth of the bag body is sleeved on the opening device, and an extension portion is provided near the bag mouth of the bag body. The opening device has a fixing portion, and both the fixing portion of the opening device and the extension portion are connected to the inner rod. During the use of the retrieval bag, the inner rod is pushed to push the opening device and the bag body out of the outer tube. The opening device resets to open the bag mouth of the bag body so that the excised tissues can be placed inside the bag body. Subsequently, the inner rod is pulled back to retract the opening device with the inner rod into the outer tube. Since both the fixing portion of the opening device and the extension portion of the bag body are connected to the inner rod, the bag mouth of the bag body will always be sleeved on the opening device and will not gather at the front end of the opening device. Therefore, when the inner rod is pushed out again, the opening device resets and still opens the bag mouth of the bag body, meeting the need for multiple removals of excised tissues during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Structural schematic diagram of the retrieval bag in the embodiment of the present application;

[0020] Figure 2 Exploded view of the retrieval bag in the embodiment of the present application;

[0021] Figure 3 Partial exploded structural schematic diagram of the retrieval bag in the embodiment of the present application;

[0022] Figure 4 Structural schematic diagram of the first fixing member in the embodiment of the present application;

[0023] Figure 5 Structural schematic diagram of the inner rod in the embodiment of the present application;

[0024] Figure 6 Exploded structural schematic diagram of the outer tube handle in the embodiment of the present application;

[0025] Figure 7 Cross-sectional view of the seal in the embodiment of the present application;

[0026] Figure 8 Schematic diagram for showing the internal structure of the outer tube handle in the embodiment of the present application;

[0027] Figure 9 This is an exploded view for showing the mating relationship between the inner rod handle and the inner rod in the embodiments of the present application.

[0028] Icons: 100 - outer tube; 110 - second fixing member; 111 - buckle; 200 - inner rod; 210 - first fixing member; 211 - recess; 220 - pin; 230 - assembly plane; 231 - profiling groove; 240 - protrusion; 250 - positioning post; 260 - indicating portion; 270 - guiding groove; 300 - opening device; 310 - fixing portion; 311 - collar; 400 - bag body; 410 - extension; 411 - first positioning hole; 412 - second positioning hole; 500 - outer tube handle; 510 - through hole; 511 - annular protrusion; 512 - card slot; 520 - seal; 521 - sealing protrusion; 522 - clamping portion; 530 - clamping groove; 600 - inner rod handle; 610 - guiding strip. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Generally, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0035] The inventor of the present application found that when the inner rod is pulled back, the bag body will be blocked by the outer tube and will not return to the inner tube with the inner rod and the opening device. The bag mouth of the bag body is no longer set on the opening device, but gathers at the front end of the opening device to form a closure. If the action of opening the bag is repeated at this time, the bag mouth of the bag body will still gather at the front end of the opening device and cannot be opened autonomously. Therefore, the conventional bag can only be opened and closed once, which cannot meet the need of multiple removal of excised tissues during surgery. The embodiment of the present application provides a bag that can be opened and closed repeatedly, at least for solving the above technical problems.

[0036] Please refer to Figures 1 - 4 The embodiment of the present application provides a repeatedly openable and reclosable taking bag including an outer tube 100, an inner rod 200, an opening device 300 and a bag body 400. The inner rod 200 is arranged inside the outer tube 100, and the inner rod 200 and the outer tube 100 are slidably matched. The bag mouth of the bag body 400 is sleeved on the opening device 300. The bag body 400 is provided with an extension part 410 near the bag mouth. The opening device 300 is provided with a fixing part 310. The fixing part 310 and the extension part 410 of the opening device 300 are both connected to the inner rod 200.

[0037] The extension portion 410 is in the shape of a sheet and extends toward one side of the bag body 400; the material of the opening device 300 is a memory metal such as a nickel-titanium alloy, so that even if the opening device 300 is stored in the outer tube 100 for a long time, the opening device 300 can still return to its original shape when it is out of the outer tube 100. When the opening device 300 returns to its original shape, a part of it is elliptical, and the elliptical part opens the bag mouth of the bag body 400 so that the excised tissue can be placed inside the bag body 400.

[0038] When using the retrieval bag, the inner rod 200 is pushed to push the opening device 300 and the bag body 400 out of the outer tube 100, and the opening device 300 is reset to open the bag mouth of the bag body 400 so that the excised tissue can be placed in the bag body 400. Then, the inner rod 200 is pulled back to retract the opening device 300 into the outer tube 100 along with the inner rod 200. Since the fixing portion 310 of the opening device 300 and the extending portion 410 of the bag body 400 are both connected to the inner rod 200, the bag mouth of the bag body 400 is always covered on the opening device 300 and will not gather at the front end of the opening device 300. Therefore, when the inner rod 200 is pushed out again, the opening of the bag body 400 will still be opened when the opening device 300 is reset, thereby meeting the need to remove the excised tissue multiple times during surgery.

[0039] In this embodiment, a first fixing member 210 is provided on the inner rod 200. Both the fixing portion 310 and the extending portion 410 of the opening device 300 are clamped between the first fixing member 210 and the inner rod 200. A pin 220 is provided on the inner rod 200, and a first positioning hole 411 is formed on the extending portion 410. The pin 220 passes through the inner rod 200, the fixing portion 310 of the opening device 300, the first fixing member 210, and the first positioning hole 411 simultaneously.

[0040] It should be noted that a part of the front end of the inner rod 200 is cut off to form an assembly plane 230. Both the fixing portion 310 and the extending portion 410 of the opening device 300 are clamped between the first fixing member 210 and the assembly plane 230 of the inner rod 200. A collar 311 is provided on the fixing portion 310 of the opening device 300. The pin 220 passes through the inner rod 200, the collar 311, the first fixing member 210, and the first positioning hole 411 simultaneously, thereby positioning the bag body 400 so that the bag mouth of the bag body 400 is always sleeved on the opening device 300.

[0041] In this embodiment, a convex portion 240 is provided on the inner rod 200, and a concave portion 211 is provided on the first fixing member 210. The convex portion 240 cooperates with the concave portion 211.

[0042] It should be noted that the convex portion 240 is provided on the assembly plane 230, and the concave portion 211 is provided on the surface of the first fixing member 210 facing the assembly plane 230. The number of the convex portions 240 can be more than two, and the number of the concave portions 211 only needs to match the number of the convex portions 240. For example, when the number of the convex portions 240 is two, the number of the concave portions 211 is also two. The two convex portions 240 cooperate with the two concave portions 211 respectively. The cooperation between the convex portion 240 and the concave portion 211 can effectively clamp the extending portion 410 of the bag body 400 to prevent the extending portion 410 from falling off.

[0043] Contour grooves 231 are formed on both the assembly plane 230 and the surface of the first fixing member 210 facing the assembly plane 230. The contour grooves 231 match the shape of the fixing portion 310 of the opening device 300. The two contour grooves 231 are arranged oppositely to form a cavity for accommodating the fixing portion 310 of the opening device 300.

[0044] In this embodiment, a second positioning hole 412 is formed on the extending portion 410, and a positioning post 250 is provided on the inner rod 200. The positioning post 250 cooperates with the second positioning hole 412, and the positioning post 250 passes through the first fixing member 210.

[0045] The positioning post 250 is arranged on the assembly plane 230. The positioning post 250 cooperates with the second positioning hole 412. Since the pin post 220 also passes through the first positioning hole 411, the bag body 400 is double-positioned, so that the bag mouth of the bag body 400 can always be sleeved on the opening device 300.

[0046] In this embodiment, the bag body 400 is made of TPU material. When the bag body 400 is located outside the outer tube 100, the bag body 400 inclines towards the side away from the outer tube 100.

[0047] The bag body 400 is formed by cutting and heat-sealing TPU material and has a certain deformation recovery ability. When the inner rod 200 is pulled back, the bag body 400 can be deformed and received into the inner part of the outer tube 100. When the inner rod 200 is pushed out and the bag body 400 is located outside the outer tube 100, the bag body 400 returns to its original state under the action of its own deformation recovery force, and the bag body 400 inclines towards the side away from the outer tube 100, which makes it easier for the bag body 400 to be received into the inner part of the outer tube 100.

[0048] In other embodiments, the bag body 400 can also be made of other thin film materials with a certain deformation recovery ability, which is not limited herein.

[0049] Please refer to Figure 5 , in this embodiment, two indicating parts 260 are spacedly arranged on the inner rod 200. When the two indicating parts 260 are respectively exposed outside the outer tube 100, the two indicating parts 260 are respectively used to indicate that the bag mouth of the bag body 400 is received into the outer tube 100 and the bag body 400 is received into the outer tube 100.

[0050] The indicating part 260 is an annular groove. The two annular grooves are spacedly arranged on the inner rod 200 along the length direction of the inner rod 200. During the process of pulling back the inner rod 200, when the annular groove near the tail end of the inner rod 200 is exposed outside the outer tube 100, it indicates that the bag mouth of the bag body 400 is received into the outer tube 100. When the other annular groove is exposed outside the outer tube 100, it indicates that the whole bag body 400 is received into the outer tube 100. At this time, the tissue contained in the bag body 400 is smaller. The two annular grooves play a role in indicating the working state of the bag body 400.

[0051] Please refer to Figures 6 - 8 , in this embodiment, an outer tube handle 500 is sleeved on the outer tube 100. The outer tube handle 500 and the outer tube 100 are bonded together by glue. A through hole 510 is arranged in the outer tube handle 500, and a sealing member 520 is arranged in the through hole 510. The inner rod 200 passes through the sealing member 520.

[0052] It should be noted that laparoscopic surgery often requires the creation of a pneumoperitoneum to create a surgical space and maintain the pneumoperitoneum state during the operation. Since there is a gap between the inner rod 200 and the outer tube 100, after the retrieval bag extends into the human body through the trocar channel, the sealing effect needs to be ensured inside the retrieval bag pipeline to prevent the leakage of the pneumoperitoneum and affect the surgical operation. Therefore, a seal 520 is provided in the through hole 510 of the outer tube handle 500, and the inner rod 200 is passed through the seal 520 to prevent gas leakage from occurring in the gap between the inner rod 200 and the outer tube 100.

[0053] In this embodiment, a sealing protrusion 521 is provided inside the seal 520, and the sealing protrusion 521 abuts against the inner rod 200.

[0054] Both the seal 520 and the sealing protrusion 521 are annular structures. The number of the sealing protrusions 521 is multiple, and the multiple sealing protrusions 521 are arranged at intervals along the length direction of the inner rod 200. Optionally, the number of the sealing protrusions 521 is three or more.

[0055] The shape of any cross-section of a single sealing protrusion 521 along its circumferential direction is triangular. On the one hand, it can ensure the seal between the inner rod 200 and the outer tube 100, and on the other hand, the sealing protrusion 521 will not generate too much frictional force on the inner rod 200, reducing the impact on the doctor's operation.

[0056] In this embodiment, an annular protrusion 511 is provided in the through hole 510. A clamping groove 530 is formed between the annular protrusion 511 and the inner wall of the through hole 510. A clamping portion 522 is provided on the seal 520, and the clamping groove 530 is clamped with the clamping portion 522; a second fixing member 110 is also provided in the through hole 510, and the second fixing member 110 is used to press the seal 520 towards the annular protrusion 511.

[0057] The clamping groove 530 is an annular groove, and the clamping portion 522 is an annular structure. The clamping groove 530 is clamped with the clamping portion 522, and the second fixing member 110 presses the seal 520 towards the annular protrusion 511, making the clamping relationship between the clamping portion 522 and the clamping groove 530 stable, thereby preferably ensuring the sealing performance between the outer tube handle 500 and the seal 520.

[0058] In this embodiment, the seal 520 is made of silicone or rubber material, which can provide better sealing performance.

[0059] In this embodiment, a buckle 111 is provided on the second fixing member 110, and a clamping groove 512 is formed on the inner wall of the through hole 510. The buckle 111 is clamped with the clamping groove 512.

[0060] The second fixing member 110 has a cylindrical structure, and the tail end of the inner rod 200 can pass through the second fixing member 110. When the second fixing member 110 is disposed in the through hole 510, the buckle 111 on the second fixing member 110 is engaged with the card slot 512 on the inner wall of the through hole 510. At this time, the second fixing member 110 can stably press the sealing member 520, so that the engaging portion 522 and the engaging slot 530 maintain a stable engaging relationship, thereby ensuring the sealing performance between the outer tube handle 500 and the sealing member 520.

[0061] In addition, please refer to Figure 9 , in this embodiment, the fetching bag further includes an inner rod handle 600. A guiding groove 270 is provided at the tail end of the inner rod 200, and a guiding strip 610 is provided on the inner rod handle 600. The guiding groove 270 cooperates with the guiding strip 610.

[0062] When installing the inner rod handle 600, the guiding strip 610 is slid into the guiding groove 270, and then the inner rod 200 and the inner rod handle 600 are bonded together with glue, so that the inner rod 200 and the inner rod handle 600 are relatively fixed.

[0063] The fetching bag that can be repeatedly opened and closed provided by the embodiment of the present application has at least the following technical effects: an extension portion 410 is provided at the bag mouth of the bag body 400, and the extension portion 410 is fixed to the inner rod 200. At this time, the bag mouth of the bag body 400 can be repeatedly opened by the opening device 300, and it is not easy to occur that the bag body 400 gathers at the front end of the opening device 300 and cannot be opened. And because the bag mouth of the bag body 400 can be pulled into the outer tube 100, the risk of tissue exposing from the bag mouth is reduced; the bag body 400 is inclined when located outside the outer tube 100, so that the bag body 400 is more easily pulled into the outer tube 100, reducing the obstruction of the bag body 400 itself, so as to realize the multiple opening and closing of the bag body 400; a sealing member 520 is provided in the outer tube handle 500, and a sealing protrusion 521 is provided in the sealing member 520. The sealing protrusion 521 abuts against the inner rod 200, preventing the inner rod 200 from sliding randomly. At the same time, not only the sealing is ensured, but also because the shape of any cross section of the sealing protrusion 521 along its circumferential direction is triangular, the contact surface with the inner rod 200 is small, and excessive friction will not be generated, affecting the operation of the doctor; the two indicating portions 260 provided at intervals on the inner rod 200 can respectively indicate the state in which the bag mouth of the bag body 400 is received into the outer tube 100 and the state in which the bag body 400 is received into the outer tube 100.

[0064] The working principle of the repeatedly openable and reclosable retrieval bag provided in the embodiment of the present application is as follows: when using the retrieval bag, grasp the outer tube handle 500 and push the inner rod handle 600. When the inner rod handle 600 abuts against the outer tube handle 500, the end of the inner rod 200 away from the inner rod handle 600 is substantially flush with the end of the outer tube 100 away from the outer tube handle 500. At this time, the opening device 300 is completely pushed out of the outer tube 100, and the opening device 300 returns to its original state, opening the bag body 400, and putting the excised tissue into the bag. After the bag body 400 is inside, the inner rod handle 600 is pulled back to retract the opening device 300 and the bag opening of the bag body 400 into the outer tube 100. In the case of small tissue, the bag body 400 can be completely retracted into the outer tube 100. Since the extension portion 410 of the bag body 400 is connected to the inner rod 200, when the bag body 400 needs to be opened again, the inner rod handle 600 is pushed again, and when the opening device 300 returns to its original state, the bag opening of the bag body 400 can be opened again, thereby meeting the need for multiple removal of excised tissues during surgery.

[0065] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A removable bag, characterized in that: The bag comprises an outer tube, an inner rod, an opening device and a bag body, wherein the inner rod is arranged inside the outer tube, and the inner rod and the outer tube are slidably matched, the bag mouth of the bag body is sleeved on the opening device, the bag body is provided with an extension part near the bag mouth, the opening device is provided with a fixing part, and the fixing part and the extension part of the opening device are both connected to the inner rod.

2. The re-openable bag according to claim 1, characterized in that: A first fixing piece is provided on the inner rod, the fixing portion of the opening device and the extending portion are clamped between the first fixing piece and the inner rod, a pin is provided on the inner rod, a first positioning hole is provided on the extending portion, and the pin passes through the inner rod, the fixing portion of the opening device, the first fixing piece and the first positioning hole at the same time.

3. The re-openable bag according to claim 2, characterized in that: The inner rod is provided with a protrusion, the first fixing member is provided with a recess, and the protrusion matches with the recess.

4. The re-openable bag according to claim 2, characterized in that: A second positioning hole is formed on the extension portion, and a positioning column is provided on the inner rod. The positioning column matches the second positioning hole, and the positioning column passes through the first fixing member.

5. The repeatedly openable and reclosable bag according to claim 1, characterized in that: Two indicating parts are arranged at intervals on the inner rod. When the two indicating parts are respectively exposed from the outer tube, the two indicating parts are used to indicate that the bag opening of the bag body is received into the outer tube and the bag body is received into the outer tube respectively.

6. The re-openable bag according to claim 1, characterized in that: The bag body is made of TPU material. When the bag body is located outside the outer tube, the bag body is inclined toward a side away from the outer tube.

7. The re-openable bag according to claim 1, characterized in that: An outer tube handle is sleeved on the outer tube, a through hole is arranged in the outer tube handle, a sealing member is arranged in the through hole, and the inner rod passes through the sealing member.

8. The re-openable bag according to claim 7, characterized in that: A sealing protrusion is arranged inside the sealing member, and the sealing protrusion abuts against the inner rod.

9. The re-openable bag according to claim 7, characterized in that: An annular protrusion is provided in the through hole, a clamping groove is formed between the annular protrusion and the inner wall of the through hole, a clamping portion is provided on the sealing member, and the clamping groove is clamped with the clamping portion; A second fixing member is also arranged in the through hole, and the second fixing member is used for pressing the sealing member toward the annular protrusion.

10. The re-openable bag according to claim 9, characterized in that: The second fixing member is provided with a buckle, and the inner wall of the through hole is provided with a clamping groove, and the buckle is clamped with the clamping groove.

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